From 8a39eba6b611f2435640d0e8a71919fc8f009d42 Mon Sep 17 00:00:00 2001
From: Miguel Freitas <miguelfreitas@users.noreply.github.com>
Date: Sun, 8 May 2016 13:09:38 -0300
Subject: [PATCH 1/3] initial webtorrent support to display embeded media
 (disabled by default)

---
 css/style.css                |  4 ++
 js/interface_common.js       | 78 +++++++++++++++++++++++++++++++++++-
 js/interface_home.js         | 31 ++++++++++++++
 js/options.js                | 15 +++++++
 js/webtorrent.min.js         |  8 ++++
 options.html                 | 28 +++++++++++++
 theme_nin/css/style.css      |  2 +-
 theme_nin/js/theme_option.js |  1 +
 theme_nin/sass/_tabs.sass    |  1 +
 9 files changed, 166 insertions(+), 2 deletions(-)
 create mode 100644 js/webtorrent.min.js

diff --git a/css/style.css b/css/style.css
index fa38bba..c42a4be 100644
--- a/css/style.css
+++ b/css/style.css
@@ -1301,6 +1301,10 @@ ol.toptrends-list {
     display: block;
     margin: 0 auto 10px auto;
 }
+.image-preview video
+{
+    width: 100%;
+}
 .preview-container
 {
     max-height: 500px;
diff --git a/js/interface_common.js b/js/interface_common.js
index 04dc8f7..d6dfe32 100644
--- a/js/interface_common.js
+++ b/js/interface_common.js
@@ -7,6 +7,7 @@
 
 var twister = {
     URIs: {},  // shortened URIs are cached here after fetching
+    torrentIds: {},  // auto-download torrentIds
     focus: {},  // focused elements are counted here
     html: {
         detached: $('<div>'),  // here elements go to detach themself
@@ -900,6 +901,7 @@ function fetchShortenedURI(req) {
 
 function applyShortenedURI(short, uriAndMimetype) {
     var long = (uriAndMimetype instanceof Array) ? uriAndMimetype[0] : uriAndMimetype;
+    var mimetype = (uriAndMimetype instanceof Array) ? uriAndMimetype[1] : undefined;
     var elems = getElem('.link-shortened[href="' + short + '"]')
         .attr('href', long)
         .removeClass('link-shortened')
@@ -907,7 +909,7 @@ function applyShortenedURI(short, uriAndMimetype) {
         .on('click mouseup', muteEvent)
     ;
     var cropped = (/*$.Options.cropLongURIs &&*/ long.length > 23) ? long.slice(0, 23) + '…' : undefined;
-    for (var i = 0; i < elems.length; i++)
+    for (var i = 0; i < elems.length; i++) {
         if (elems[i].text === short)  // there may be some other text, possibly formatted, so we check it
             if (cropped)
                 $(elems[i])
@@ -917,6 +919,80 @@ function applyShortenedURI(short, uriAndMimetype) {
                 ;
             else
                 elems[i].text = long;
+
+        if (long.lastIndexOf('magnet:?xt=urn:btih:') === 0) {
+            var previewContainer = $(elems[i]).parents(".post-data").find(".preview-container");
+            var fromUser = $(elems[i]).parents(".post-data").attr("data-screen-name");
+            var isMedia = mimetype !== undefined &&
+                          (mimetype.lastIndexOf('video') === 0 ||
+                           mimetype.lastIndexOf('image') === 0 ||
+                           mimetype.lastIndexOf('audio') === 0);
+            if ($.Options.WebTorrent.val === 'enable') {
+                if ($.Options.WebTorrentAutoDownload.val === 'enable' &&
+                    followingUsers.indexOf(fromUser) !==-1) {
+                    twister.torrentIds[long] = true;
+                    $.localStorage.set('torrentIds', twister.torrentIds);
+                    startTorrentDownloadAndPreview(long, previewContainer, isMedia);
+                } else {
+                    // webtorrent enabled but no auto-download. provide a link to start manually.
+                    var startTorrentLink = $('<a href="#">Start WebTorrent download of this media</a>');
+                    startTorrentLink.on('click', function(event) {
+                        event.stopPropagation();
+                        startTorrentDownloadAndPreview(long, previewContainer, isMedia)
+                    });
+                    previewContainer.append(startTorrentLink);
+                }
+            } else {
+                previewContainer.text(polyglot.t('Enable WebTorrent support in options page to display this content'));
+            }
+        }
+    }
+}
+
+function startTorrentDownloadAndPreview(torrentId, previewContainer, isMedia) {
+    var torrent = WebTorrentClient.get(torrentId);
+    if( torrent === null ) 
+        torrent = WebTorrentClient.add(torrentId);
+
+    previewContainer.empty();
+    var speedStatus = $('<span class="post-text"/>');
+    previewContainer.append(speedStatus);
+    function updateSpeed () {
+        var progress = (100 * torrent.progress).toFixed(1)
+        speedStatus[0].innerHTML =
+            '<b>Peers:</b> ' + torrent.numPeers + ' ' +
+            '<b>Progress:</b> ' + progress + '% ' +
+            '<b>Download:</b> ' + torrent.downloadSpeed + '/s ' +
+            '<b>Upload:</b> ' + torrent.uploadSpeed + '/s';
+    }
+    setInterval(updateSpeed, 1000);
+    updateSpeed();
+
+    if( torrent.files.length ) {
+        webtorrentFilePreview(torrent.files[0], previewContainer, isMedia)
+    } else {
+        torrent.on('metadata', function () {
+            webtorrentFilePreview(torrent.files[0], previewContainer, isMedia)
+        });
+    }
+}
+
+function webtorrentFilePreview(file, previewContainer, isMedia) {
+    if (isMedia) {
+        var imagePreview = $('<div class="image-preview" />');
+        previewContainer.append(imagePreview);
+        file.appendTo(imagePreview[0], function (err, elem) {
+            elem.pause();
+        });
+        imagePreview.find("video").removeAttr("autoplay").get(0).pause();
+    } else {
+        file.getBlobURL(function (err, url) {
+            if (err) return console.error(err)
+            var blobLink = $('<a href="' + url + '" download="'+file.name+'">' +
+                'Download ' + file.name + '</a>');
+            previewContainer.append(blobLink);
+        })
+    }
 }
 
 function routeOnClick(event) {
diff --git a/js/interface_home.js b/js/interface_home.js
index f7713dd..6e11d39 100644
--- a/js/interface_home.js
+++ b/js/interface_home.js
@@ -109,6 +109,9 @@ var InterfaceFunctions = function() {
             initTopTrends();
         else
             killInterfaceModule('toptrends');
+
+        if ($.Options.WebTorrent.val === 'enable')
+            initWebTorrent();
     }
 }
 
@@ -302,6 +305,34 @@ function refreshTwistdayReminder() {
     }
 }
 
+function initWebTorrent() {
+    //localStorage.debug = '*'
+    localStorage.removeItem('debug')
+
+    WEBTORRENT_ANNOUNCE = $.Options.WebTorrentTrackers.val.split(/[ ,]+/)
+    $.getScript('js/webtorrent.min.js', function( data, textStatus, jqxhr ) {
+        WebTorrentClient = new WebTorrent();
+        console.log("WebTorrent started")
+        WebTorrentClient.on('error', function (err) {
+            console.error('ERROR: ' + err.message);
+        });
+        WebTorrentClient.on('warning', function (err) {
+            console.error('WARNING: ' + err.message);
+        });
+
+        if ($.localStorage.isSet('torrentIds'))
+            twister.torrentIds = $.localStorage.get('torrentIds');
+        if ($.Options.WebTorrentAutoDownload.val === 'enable') {
+            for (var torrentId in twister.torrentIds) {
+                if( twister.torrentIds[torrentId] === true ) {
+                    console.log("WebTorrent auto-download: " + torrentId);
+                    WebTorrentClient.add(torrentId);
+                }
+            }
+        }
+    });
+}
+
 //***********************************************
 //******************* INIT **************
 //***********************************************
diff --git a/js/options.js b/js/options.js
index 8315252..6906cc5 100644
--- a/js/options.js
+++ b/js/options.js
@@ -280,6 +280,21 @@ function twisterOptions() {
         getMethod: function (val) {return parseFloat(val);},
         tickMethod: function (elem) {$('.volValue').text((elem.value * 100).toFixed());}
     });
+    this.add({
+        name: 'WebTorrent',
+        valDefault: 'disable',
+        tickMethod: function (elem) {
+            $('#WebTorrentCont').css('display', (elem.value === 'enable') ? 'block' : 'none');
+        }
+    });
+    this.add({
+        name: 'WebTorrentTrackers',
+        valDefault: 'wss://tracker.webtorrent.io,wss://tracker.btorrent.xyz,wss://tracker.openwebtorrent.com,wss://tracker.fastcast.nz'
+    });
+    this.add({
+        name: 'WebTorrentAutoDownload',
+        valDefault: 'enable'
+    });
 }
 
 twisterOptions.prototype.add = function (option) {
diff --git a/js/webtorrent.min.js b/js/webtorrent.min.js
new file mode 100644
index 0000000..443cd5b
--- /dev/null
+++ b/js/webtorrent.min.js
@@ -0,0 +1,8 @@
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var t;t="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,t.WebTorrent=e()}}(function(){var e;return function t(e,n,r){function o(s,a){if(!n[s]){if(!e[s]){var c="function"==typeof require&&require;if(!a&&c)return c(s,!0);if(i)return i(s,!0);var u=new Error("Cannot find module '"+s+"'");throw u.code="MODULE_NOT_FOUND",u}var f=n[s]={exports:{}};e[s][0].call(f.exports,function(t){var n=e[s][1][t];return o(n?n:t)},f,f.exports,t,e,n,r)}return n[s].exports}for(var i="function"==typeof require&&require,s=0;s<r.length;s++)o(r[s]);return o}({1:[function(e,t,n){function r(e,t){s.Readable.call(this,t),this.destroyed=!1,this._torrent=e._torrent;var n=t&&t.start||0,r=t&&t.end&&t.end<e.length?t.end:e.length-1,o=e._torrent.pieceLength;this._startPiece=(n+e.offset)/o|0,this._endPiece=(r+e.offset)/o|0,this._piece=this._startPiece,this._offset=n+e.offset-this._startPiece*o,this._missing=r-n+1,this._reading=!1,this._notifying=!1,this._criticalLength=Math.min(1048576/o|0,2)}t.exports=r;var o=e("debug")("webtorrent:file-stream"),i=e("inherits"),s=e("readable-stream");i(r,s.Readable),r.prototype._read=function(){this._reading||(this._reading=!0,this._notify())},r.prototype._notify=function(){var e=this;if(e._reading&&0!==e._missing){if(!e._torrent.bitfield.get(e._piece))return e._torrent.critical(e._piece,e._piece+e._criticalLength);if(!e._notifying){e._notifying=!0;var t=e._piece;e._torrent.store.get(t,function(n,r){if(e._notifying=!1,!e.destroyed){if(n)return e._destroy(n);o("read %s (length %s) (err %s)",t,r.length,n&&n.message),e._offset&&(r=r.slice(e._offset),e._offset=0),e._missing<r.length&&(r=r.slice(0,e._missing)),e._missing-=r.length,o("pushing buffer of length %s",r.length),e._reading=!1,e.push(r),0===e._missing&&e.push(null)}}),e._piece+=1}}},r.prototype.destroy=function(e){this._destroy(null,e)},r.prototype._destroy=function(e,t){this.destroyed||(this.destroyed=!0,this._torrent.destroyed||this._torrent.deselect(this._startPiece,this._endPiece,!0),e&&this.emit("error",e),this.emit("close"),t&&t())}},{debug:64,inherits:72,"readable-stream":99}],2:[function(e,t,n){(function(n){function r(e,t){i.call(this),this._torrent=e,this.name=t.name,this.path=t.path,this.length=t.length,this.offset=t.offset,this.done=!1;var n=t.offset,r=n+t.length-1;this._startPiece=n/this._torrent.pieceLength|0,this._endPiece=r/this._torrent.pieceLength|0,0===this.length&&(this.done=!0,this.emit("done"))}t.exports=r;var o=e("end-of-stream"),i=e("events").EventEmitter,s=e("./file-stream"),a=e("inherits"),c=e("path"),u=e("render-media"),f=e("readable-stream"),d=e("stream-to-blob-url"),h=e("stream-with-known-length-to-buffer");a(r,i),r.prototype.select=function(e){0!==this.length&&this._torrent.select(this._startPiece,this._endPiece,e)},r.prototype.deselect=function(){0!==this.length&&this._torrent.deselect(this._startPiece,this._endPiece,!1)},r.prototype.createReadStream=function(e){var t=this;if(0===this.length){var r=new f.PassThrough;return n.nextTick(function(){r.end()}),r}var i=new s(t,e);return t._torrent.select(i._startPiece,i._endPiece,!0,function(){i._notify()}),o(i,function(){t._torrent.destroyed||t._torrent.deselect(i._startPiece,i._endPiece,!0)}),i},r.prototype.getBuffer=function(e){h(this.createReadStream(),this.length,e)},r.prototype.getBlobURL=function(e){if("undefined"==typeof window)throw new Error("browser-only method");var t=u.mime[c.extname(this.name).toLowerCase()];d(this.createReadStream(),t,e)},r.prototype.appendTo=function(e,t){if("undefined"==typeof window)throw new Error("browser-only method");u.append(this,e,t)},r.prototype.renderTo=function(e,t){if("undefined"==typeof window)throw new Error("browser-only method");u.render(this,e,t)},r.prototype._destroy=function(){this._torrent=null}}).call(this,e("_process"))},{"./file-stream":1,_process:31,"end-of-stream":67,events:27,inherits:72,path:30,"readable-stream":99,"render-media":100,"stream-to-blob-url":130,"stream-with-known-length-to-buffer":133}],3:[function(e,t,n){function r(e,t){var n=this;n.id=e,n.type=t,s("new Peer %s",e),n.addr=null,n.conn=null,n.swarm=null,n.wire=null,n.connected=!1,n.destroyed=!1,n.timeout=null,n.retries=0,n.sentHandshake=!1}function o(){}var i=e("unordered-array-remove"),s=e("debug")("webtorrent:peer"),a=e("bittorrent-protocol"),c=e("./webconn"),u=5e3,f=25e3,d=25e3;n.createWebRTCPeer=function(e,t){var n=new r(e.id,"webrtc");return n.conn=e,n.swarm=t,n.conn.connected?n.onConnect():(n.conn.once("connect",function(){n.onConnect()}),n.conn.once("error",function(e){n.destroy(e)}),n.startConnectTimeout()),n},n.createTCPIncomingPeer=function(e){var t=e.remoteAddress+":"+e.remotePort,n=new r(t,"tcpIncoming");return n.conn=e,n.addr=t,n.onConnect(),n},n.createTCPOutgoingPeer=function(e,t){var n=new r(e,"tcpOutgoing");return n.addr=e,n.swarm=t,n},n.createWebSeedPeer=function(e,t){var n=new r(e,"webSeed");return n.swarm=t,n.conn=new c(e,t),n.onConnect(),n},r.prototype.onConnect=function(){var e=this;if(!e.destroyed){e.connected=!0,s("Peer %s connected",e.id),clearTimeout(e.connectTimeout);var t=e.conn;t.once("end",function(){e.destroy()}),t.once("close",function(){e.destroy()}),t.once("finish",function(){e.destroy()}),t.once("error",function(t){e.destroy(t)});var n=e.wire=new a;n.type=e.type,n.once("end",function(){e.destroy()}),n.once("close",function(){e.destroy()}),n.once("finish",function(){e.destroy()}),n.once("error",function(t){e.destroy(t)}),n.once("handshake",function(t,n){e.onHandshake(t,n)}),e.startHandshakeTimeout(),t.pipe(n).pipe(t),e.swarm&&!e.sentHandshake&&e.handshake()}},r.prototype.onHandshake=function(e,t){var n=this;if(n.swarm){if(n.swarm.destroyed)return n.destroy(new Error("swarm already destroyed"));if(e!==n.swarm.infoHash)return n.destroy(new Error("unexpected handshake info hash for this swarm"));if(t===n.swarm.peerId)return n.destroy(new Error("refusing to connect to ourselves"));s("Peer %s got handshake %s",n.id,e),clearTimeout(n.handshakeTimeout),n.retries=0;var r=n.addr;!r&&n.conn.remoteAddress&&(r=n.conn.remoteAddress+":"+n.conn.remotePort),n.swarm._onWire(n.wire,r),n.swarm&&!n.swarm.destroyed&&(n.sentHandshake||n.handshake())}},r.prototype.handshake=function(){var e=this,t={dht:e.swarm["private"]?!1:!!e.swarm.client.dht};e.wire.handshake(e.swarm.infoHash,e.swarm.client.peerId,t),e.sentHandshake=!0},r.prototype.startConnectTimeout=function(){var e=this;clearTimeout(e.connectTimeout),e.connectTimeout=setTimeout(function(){e.destroy(new Error("connect timeout"))},"webrtc"===e.type?f:u),e.connectTimeout.unref&&e.connectTimeout.unref()},r.prototype.startHandshakeTimeout=function(){var e=this;clearTimeout(e.handshakeTimeout),e.handshakeTimeout=setTimeout(function(){e.destroy(new Error("handshake timeout"))},d),e.handshakeTimeout.unref&&e.handshakeTimeout.unref()},r.prototype.destroy=function(e){var t=this;if(!t.destroyed){t.destroyed=!0,t.connected=!1,s("destroy %s (error: %s)",t.id,e&&(e.message||e)),clearTimeout(t.connectTimeout),clearTimeout(t.handshakeTimeout);var n=t.swarm,r=t.conn,a=t.wire;t.swarm=null,t.conn=null,t.wire=null,n&&a&&i(n.wires,n.wires.indexOf(a)),r&&(r.on("error",o),r.destroy()),a&&a.destroy(),n&&n.removePeer(t.id)}}},{"./webconn":6,"bittorrent-protocol":9,debug:64,"unordered-array-remove":139}],4:[function(e,t,n){function r(e){var t=this;t._torrent=e,t._numPieces=e.pieces.length,t._pieces=[],t._onWire=function(e){t.recalculate(),t._initWire(e)},t._onWireHave=function(e){t._pieces[e]+=1},t._onWireBitfield=function(){t.recalculate()},t._torrent.wires.forEach(function(e){t._initWire(e)}),t._torrent.on("wire",t._onWire),t.recalculate()}function o(){return!0}t.exports=r,r.prototype.getRarestPiece=function(e){e||(e=o);for(var t=[],n=1/0,r=0;r<this._numPieces;++r)if(e(r)){var i=this._pieces[r];i===n?t.push(r):n>i&&(t=[r],n=i)}return t.length>0?t[Math.random()*t.length|0]:-1},r.prototype.destroy=function(){var e=this;e._torrent.removeListener("wire",e._onWire),e._torrent.wires.forEach(function(t){e._cleanupWireEvents(t)}),e._torrent=null,e._pieces=null,e._onWire=null,e._onWireHave=null,e._onWireBitfield=null},r.prototype._initWire=function(e){var t=this;e._onClose=function(){t._cleanupWireEvents(e);for(var n=0;n<this._numPieces;++n)t._pieces[n]-=e.peerPieces.get(n)},e.on("have",t._onWireHave),e.on("bitfield",t._onWireBitfield),e.once("close",e._onClose)},r.prototype.recalculate=function(){var e;for(e=0;e<this._numPieces;++e)this._pieces[e]=0;var t=this._torrent.wires.length;for(e=0;t>e;++e)for(var n=this._torrent.wires[e],r=0;r<this._numPieces;++r)this._pieces[r]+=n.peerPieces.get(r)},r.prototype._cleanupWireEvents=function(e){e.removeListener("have",this._onWireHave),e.removeListener("bitfield",this._onWireBitfield),e._onClose&&e.removeListener("close",e._onClose),e._onClose=null}},{}],5:[function(e,t,n){(function(n,r){function o(e,t,n){p.call(this),this.client=t,this._debugId=this.client.peerId.slice(32),this._debug("new torrent"),this.announce=n.announce,this.urlList=n.urlList,this.path=n.path,this._store=n.store||y,this._getAnnounceOpts=n.getAnnounceOpts,this.strategy=n.strategy||"sequential",this.maxWebConns=n.maxWebConns||4,this._rechokeNumSlots=n.uploads===!1||0===n.uploads?0:+n.uploads||10,this._rechokeOptimisticWire=null,this._rechokeOptimisticTime=0,this._rechokeIntervalId=null,this.ready=!1,this.destroyed=!1,this.paused=!1,this.done=!1,this.metadata=null,this.store=null,this.files=[],this.pieces=[],this._amInterested=!1,this._selections=[],this._critical=[],this.wires=[],this._queue=[],this._peers={},this._peersLength=0,this.received=0,this.uploaded=0,this._downloadSpeed=U(),this._uploadSpeed=U(),this._servers=[],this._fileModtimes=n.fileModtimes,null!==e&&this._onTorrentId(e)}function i(e,t){return 2+Math.ceil(t*e.downloadSpeed()/C.BLOCK_LENGTH)}function s(e,t,n){return 1+Math.ceil(t*e.downloadSpeed()/n)}function a(e){return Math.random()*e|0}function c(){}t.exports=o;var u=e("addr-to-ip-port"),f=e("bitfield"),d=e("chunk-store-stream/write"),h=e("debug")("webtorrent:torrent"),l=e("torrent-discovery"),p=e("events").EventEmitter,m=e("xtend"),g=e("xtend/mutable"),_=e("fs"),y=e("fs-chunk-store"),v=e("immediate-chunk-store"),b=e("inherits"),w=e("multistream"),E=e("net"),k=e("os"),x=e("run-parallel"),S=e("run-parallel-limit"),B=e("parse-torrent"),I=e("path"),A=e("path-exists"),C=e("torrent-piece"),T=e("pump"),L=e("random-iterate"),R=e("simple-sha1"),U=e("speedometer"),P=e("uniq"),O=e("ut_metadata"),M=e("ut_pex"),H=e("./file"),j=e("./peer"),D=e("./rarity-map"),q=e("./server"),N=131072,W=3e4,z=5e3,F=3*C.BLOCK_LENGTH,Y=.5,V=1,G=1e4,$=2,K=2,X=[1e3,5e3,15e3],J="function"==typeof A.sync?I.join(A.sync("/tmp")?"/tmp":k.tmpDir(),"webtorrent"):"/tmp/webtorrent";b(o,p),Object.defineProperty(o.prototype,"timeRemaining",{get:function(){return this.done?0:0===this.downloadSpeed?1/0:(this.length-this.downloaded)/this.downloadSpeed*1e3}}),Object.defineProperty(o.prototype,"downloaded",{get:function(){if(!this.bitfield)return 0;for(var e=0,t=0,n=this.pieces.length;n>t;++t)if(this.bitfield.get(t))e+=t===n-1?this.lastPieceLength:this.pieceLength;else{var r=this.pieces[t];e+=r.length-r.missing}return e}}),Object.defineProperty(o.prototype,"downloadSpeed",{get:function(){return this._downloadSpeed()}}),Object.defineProperty(o.prototype,"uploadSpeed",{get:function(){return this._uploadSpeed()}}),Object.defineProperty(o.prototype,"progress",{get:function(){return this.length?this.downloaded/this.length:0}}),Object.defineProperty(o.prototype,"ratio",{get:function(){return this.uploaded/(this.received||1)}}),Object.defineProperty(o.prototype,"numPeers",{get:function(){return this.wires.length}}),Object.defineProperty(o.prototype,"torrentFileBlobURL",{get:function(){if("undefined"==typeof window)throw new Error("browser-only property");return this.torrentFile?URL.createObjectURL(new Blob([this.torrentFile],{type:"application/x-bittorrent"})):null}}),Object.defineProperty(o.prototype,"_numQueued",{get:function(){return this._queue.length+(this._peersLength-this._numConns)}}),Object.defineProperty(o.prototype,"_numConns",{get:function(){var e=this,t=0;for(var n in e._peers)e._peers[n].connected&&(t+=1);return t}}),Object.defineProperty(o.prototype,"swarm",{get:function(){return console.log("WebTorrent: `torrent.swarm` is deprecated. Use `torrent` directly instead."),this}}),o.prototype._onTorrentId=function(e){var t=this;if(!t.destroyed){var r;try{r=B(e)}catch(o){}r?(t.infoHash=r.infoHash,n.nextTick(function(){t.destroyed||t._onParsedTorrent(r)})):B.remote(e,function(e,n){return t.destroyed?void 0:e?t._destroy(e):void t._onParsedTorrent(n)})}},o.prototype._onParsedTorrent=function(e){var t=this;if(!t.destroyed){if(t._processParsedTorrent(e),!t.infoHash)return t._destroy(new Error("Malformed torrent data: No info hash"));t.path||(t.path=I.join(J,t.infoHash)),t._rechokeIntervalId=setInterval(function(){t._rechoke()},G),t._rechokeIntervalId.unref&&t._rechokeIntervalId.unref(),t.emit("infoHash",t.infoHash),t.destroyed||(t.client.listening?t._onListening():t.client.once("listening",function(){t._onListening()}))}},o.prototype._processParsedTorrent=function(e){this.announce&&(e.announce=e.announce.concat(this.announce)),this.client.tracker&&r.WEBTORRENT_ANNOUNCE&&!this["private"]&&(e.announce=e.announce.concat(r.WEBTORRENT_ANNOUNCE)),this.urlList&&(e.urlList=e.urlList.concat(this.urlList)),P(e.announce),P(e.urlList),g(this,e),this.magnetURI=B.toMagnetURI(e),this.torrentFile=B.toTorrentFile(e)},o.prototype._onListening=function(){function e(e){i._destroy(e)}function t(e){"string"==typeof e&&i.done||i.addPeer(e)}function n(){i.emit("trackerAnnounce"),0===i.numPeers&&i.emit("noPeers","tracker")}function r(){i.emit("dhtAnnounce"),0===i.numPeers&&i.emit("noPeers","dht")}function o(e){i.emit("warning",e)}var i=this;if(!i.discovery&&!i.destroyed){var s={rtcConfig:i.client._rtcConfig,wrtc:i.client._wrtc,getAnnounceOpts:function(){var e={uploaded:i.uploaded,downloaded:i.downloaded,left:Math.max(i.length-i.downloaded,0)};return i._getAnnounceOpts&&(e=m(e,i._getAnnounceOpts())),e}};i.discovery=new l({infoHash:i.infoHash,announce:i.announce,peerId:i.client.peerId,dht:!i["private"]&&i.client.dht,tracker:i.client.tracker&&s,port:i.client.torrentPort}),i.discovery.on("error",e),i.discovery.on("peer",t),i.discovery.on("trackerAnnounce",n),i.discovery.on("dhtAnnounce",r),i.discovery.on("warning",o),i.info&&i._onMetadata(i)}},o.prototype._onMetadata=function(e){var t=this;if(!t.metadata&&!t.destroyed){t._debug("got metadata");var n;if(e&&e.infoHash)n=e;else try{n=B(e)}catch(r){return t._destroy(r)}t._processParsedTorrent(n),t.metadata=t.torrentFile,t.urlList.forEach(function(e){t.addWebSeed(e)}),t._rarityMap=new D(t),t.store=new v(new t._store(t.pieceLength,{torrent:{infoHash:t.infoHash},files:t.files.map(function(e){return{path:I.join(t.path,e.path),length:e.length,offset:e.offset}}),length:t.length})),t.files=t.files.map(function(e){return new H(t,e)}),t._hashes=t.pieces,t.pieces=t.pieces.map(function(e,n){var r=n===t.pieces.length-1?t.lastPieceLength:t.pieceLength;return new C(r)}),t._reservations=t.pieces.map(function(){return[]}),t.bitfield=new f(t.pieces.length),t.wires.forEach(function(e){e.ut_metadata&&e.ut_metadata.setMetadata(t.metadata),t._onWireWithMetadata(e)}),t._debug("verifying existing torrent data"),t._fileModtimes&&t._store===y?t.getFileModtimes(function(e,n){if(e)return t._destroy(e);var r=t.files.map(function(e,r){return n[r]===t._fileModtimes[r]}).every(function(e){return e});if(r){for(var o=0;o<t.pieces.length;o++)t._markVerified(o);t._onStore()}else t._verifyPieces()}):t._verifyPieces(),t.emit("metadata")}},o.prototype.getFileModtimes=function(e){var t=this,n=[];S(t.files.map(function(e,r){return function(o){_.stat(I.join(t.path,e.path),function(e,t){return e&&"ENOENT"!==e.code?o(e):(n[r]=t&&t.mtime.getTime(),void o(null))})}}),K,function(r){t._debug("done getting file modtimes"),e(r,n)})},o.prototype._verifyPieces=function(){var e=this;S(e.pieces.map(function(t,n){return function(t){return e.destroyed?t(new Error("torrent is destroyed")):void e.store.get(n,function(r,o){return r?t(null):void R(o,function(r){if(r===e._hashes[n]){if(!e.pieces[n])return;e._debug("piece verified %s",n),e._markVerified(n)}else e._debug("piece invalid %s",n);t(null)})})}}),K,function(t){return t?e._destroy(t):(e._debug("done verifying"),void e._onStore())})},o.prototype._markVerified=function(e){this.pieces[e]=null,this._reservations[e]=null,this.bitfield.set(e,!0)},o.prototype._onStore=function(){var e=this;e.destroyed||(e._debug("on store"),e.select(0,e.pieces.length-1,!1),e.ready=!0,e.emit("ready"),e._checkDone(),e._updateSelections())},o.prototype.destroy=function(e){var t=this;t._destroy(null,e)},o.prototype._destroy=function(e,t){var n=this;if(!n.destroyed){n.destroyed=!0,n._debug("destroy"),n.client._remove(n),clearInterval(n._rechokeIntervalId),n._rarityMap&&n._rarityMap.destroy();for(var r in n._peers)n.removePeer(r);n.files.forEach(function(e){e instanceof H&&e._destroy()});var o=n._servers.map(function(e){return function(t){e.destroy(t)}});n.discovery&&o.push(function(e){n.discovery.destroy(e)}),n.store&&o.push(function(e){n.store.close(e)}),x(o,t),e&&(0===n.listenerCount("error")?n.client.emit("error",e):n.emit("error",e)),n.emit("close"),n.client=null,n.files=[],n.discovery=null,n.store=null,n._rarityMap=null,n._peers=null,n._servers=null}},o.prototype.addPeer=function(e){var t=this;if(t.destroyed)throw new Error("torrent is destroyed");if(!t.infoHash)throw new Error("addPeer() must not be called before the `infoHash` event");if(t.client.blocked){var n;if("string"==typeof e){var r;try{r=u(e)}catch(o){return t._debug("ignoring peer: invalid %s",e),t.emit("invalidPeer",e),!1}n=r[0]}else"string"==typeof e.remoteAddress&&(n=e.remoteAddress);if(n&&t.client.blocked.contains(n))return t._debug("ignoring peer: blocked %s",e),"string"!=typeof e&&e.destroy(),t.emit("blockedPeer",e),!1}var i=!!t._addPeer(e);return i?t.emit("peer",e):t.emit("invalidPeer",e),i},o.prototype._addPeer=function(e){var t=this;if(t.destroyed)return t._debug("ignoring peer: torrent is destroyed"),"string"!=typeof e&&e.destroy(),null;if("string"==typeof e&&!t._validAddr(e))return t._debug("ignoring peer: invalid %s",e),null;var n=e&&e.id||e;if(t._peers[n])return t._debug("ignoring peer: duplicate (%s)",n),"string"!=typeof e&&e.destroy(),null;if(t.paused)return t._debug("ignoring peer: torrent is paused"),"string"!=typeof e&&e.destroy(),null;t._debug("add peer %s",n);var r;return r="string"==typeof e?j.createTCPOutgoingPeer(e,t):j.createWebRTCPeer(e,t),t._peers[r.id]=r,t._peersLength+=1,"string"==typeof e&&(t._queue.push(r),t._drain()),r},o.prototype.addWebSeed=function(e){if(this.destroyed)throw new Error("torrent is destroyed");if(!/^https?:\/\/.+/.test(e))return this._debug("ignoring invalid web seed %s",e),void this.emit("invalidPeer",e);if(this._peers[e])return this._debug("ignoring duplicate web seed %s",e),void this.emit("invalidPeer",e);this._debug("add web seed %s",e);var t=j.createWebSeedPeer(e,this);this._peers[t.id]=t,this._peersLength+=1,this.emit("peer",e)},o.prototype._addIncomingPeer=function(e){var t=this;return t.destroyed?e.destroy(new Error("torrent is destroyed")):t.paused?e.destroy(new Error("torrent is paused")):(this._debug("add incoming peer %s",e.id),t._peers[e.id]=e,void(t._peersLength+=1))},o.prototype.removePeer=function(e){var t=this,n=e&&e.id||e;e=t._peers[n],e&&(this._debug("removePeer %s",n),delete t._peers[n],t._peersLength-=1,e.destroy(),t._drain())},o.prototype.select=function(e,t,n,r){var o=this;if(o.destroyed)throw new Error("torrent is destroyed");if(e>t||0>e||t>=o.pieces.length)throw new Error("invalid selection ",e,":",t);n=Number(n)||0,o._debug("select %s-%s (priority %s)",e,t,n),o._selections.push({from:e,to:t,offset:0,priority:n,notify:r||c}),o._selections.sort(function(e,t){return t.priority-e.priority}),o._updateSelections()},o.prototype.deselect=function(e,t,n){var r=this;if(r.destroyed)throw new Error("torrent is destroyed");n=Number(n)||0,r._debug("deselect %s-%s (priority %s)",e,t,n);for(var o=0;o<r._selections.length;++o){var i=r._selections[o];if(i.from===e&&i.to===t&&i.priority===n){r._selections.splice(o--,1);break}}r._updateSelections()},o.prototype.critical=function(e,t){var n=this;if(n.destroyed)throw new Error("torrent is destroyed");n._debug("critical %s-%s",e,t);for(var r=e;t>=r;++r)n._critical[r]=!0;n._updateSelections()},o.prototype._onWire=function(e,t){var r=this;if(r._debug("got wire %s (%s)",e._debugId,t||"Unknown"),e.on("download",function(e){r.destroyed||(r.received+=e,r._downloadSpeed(e),r.client._downloadSpeed(e),r.emit("download",e),r.client.emit("download",e))}),e.on("upload",function(e){r.destroyed||(r.uploaded+=e,r._uploadSpeed(e),r.client._uploadSpeed(e),r.emit("upload",e),r.client.emit("upload",e))}),r.wires.push(e),t){var o=u(t);e.remoteAddress=o[0],e.remotePort=o[1]}r.client.dht&&r.client.dht.listening&&e.on("port",function(n){if(!r.destroyed&&!r.client.dht.destroyed){if(!e.remoteAddress)return r._debug("ignoring PORT from peer with no address");if(0===n||n>65536)return r._debug("ignoring invalid PORT from peer");r._debug("port: %s (from %s)",n,t),r.client.dht.addNode({host:e.remoteAddress,port:n})}}),e.on("timeout",function(){r._debug("wire timeout (%s)",t),e.destroy()}),e.setTimeout(W,!0),e.setKeepAlive(!0),e.use(O(r.metadata)),e.ut_metadata.on("warning",function(e){r._debug("ut_metadata warning: %s",e.message)}),r.metadata||(e.ut_metadata.on("metadata",function(e){r._debug("got metadata via ut_metadata"),r._onMetadata(e)}),e.ut_metadata.fetch()),"function"!=typeof M||r["private"]||(e.use(M()),e.ut_pex.on("peer",function(e){r.done||(r._debug("ut_pex: got peer: %s (from %s)",e,t),r.addPeer(e))}),e.ut_pex.on("dropped",function(e){var n=r._peers[e];n&&!n.connected&&(r._debug("ut_pex: dropped peer: %s (from %s)",e,t),r.removePeer(e))}),e.once("close",function(){e.ut_pex.reset()})),r.emit("wire",e,t),r.metadata&&n.nextTick(function(){r._onWireWithMetadata(e)})},o.prototype._onWireWithMetadata=function(e){function t(){r.destroyed||e.destroyed||(r._numQueued>2*(r._numConns-r.numPeers)&&e.amInterested?e.destroy():(o=setTimeout(t,z),o.unref&&o.unref()))}function n(){if(e.peerPieces.length===r.pieces.length){for(;i<r.pieces.length;++i)if(!e.peerPieces.get(i))return;e.isSeeder=!0,e.choke()}}var r=this,o=null,i=0;e.on("bitfield",function(){n(),r._update()}),e.on("have",function(){n(),r._update()}),e.once("interested",function(){e.unchoke()}),e.once("close",function(){clearTimeout(o)}),e.on("choke",function(){clearTimeout(o),o=setTimeout(t,z),o.unref&&o.unref()}),e.on("unchoke",function(){clearTimeout(o),r._update()}),e.on("request",function(t,n,o,i){return o>N?e.destroy():void(r.pieces[t]||r.store.get(t,{offset:n,length:o},i))}),e.bitfield(r.bitfield),e.interested(),e.peerExtensions.dht&&r.client.dht&&r.client.dht.listening&&e.port(r.client.dht.address().port),o=setTimeout(t,z),o.unref&&o.unref(),e.isSeeder=!1,n()},o.prototype._updateSelections=function(){var e=this;e.ready&&!e.destroyed&&(n.nextTick(function(){e._gcSelections()}),e._updateInterest(),e._update())},o.prototype._gcSelections=function(){for(var e=this,t=0;t<e._selections.length;t++){for(var n=e._selections[t],r=n.offset;e.bitfield.get(n.from+n.offset)&&n.from+n.offset<n.to;)n.offset++;r!==n.offset&&n.notify(),n.to===n.from+n.offset&&e.bitfield.get(n.from+n.offset)&&(e._selections.splice(t--,1),n.notify(),e._updateInterest())}e._selections.length||e.emit("idle")},o.prototype._updateInterest=function(){var e=this,t=e._amInterested;e._amInterested=!!e._selections.length,e.wires.forEach(function(t){e._amInterested?t.interested():t.uninterested()}),t!==e._amInterested&&(e._amInterested?e.emit("interested"):e.emit("uninterested"))},o.prototype._update=function(){var e=this;if(!e.destroyed)for(var t,n=L(e.wires);t=n();)e._updateWire(t)},o.prototype._updateWire=function(e){function t(t,n,r,o){return function(i){return i>=t&&n>=i&&!(i in r)&&e.peerPieces.get(i)&&(!o||o(i))}}function n(){if(!e.requests.length)for(var n=a._selections.length;n--;){var r,o=a._selections[n];if("rarest"===a.strategy)for(var i=o.from+o.offset,s=o.to,c=s-i+1,u={},f=0,d=t(i,s,u);c>f&&(r=a._rarityMap.getRarestPiece(d),!(0>r));){if(a._request(e,r,!1))return;u[r]=!0,f+=1}else for(r=o.to;r>=o.from+o.offset;--r)if(e.peerPieces.get(r)&&a._request(e,r,!1))return}}function r(){var t=e.downloadSpeed()||1;if(t>F)return function(){return!0};var n=Math.max(1,e.requests.length)*C.BLOCK_LENGTH/t,r=10,o=0;return function(e){if(!r||a.bitfield.get(e))return!0;for(var i=a.pieces[e].missing;o<a.wires.length;o++){var s=a.wires[o],c=s.downloadSpeed();if(!(F>c)&&!(t>=c)&&s.peerPieces.get(e)&&!((i-=c*n)>0))return r--,!1}return!0}}function o(e){for(var t=e,n=e;n<a._selections.length&&a._selections[n].priority;n++)t=n;var r=a._selections[e];a._selections[e]=a._selections[t],a._selections[t]=r}function s(n){if(e.requests.length>=u)return!0;for(var i=r(),s=0;s<a._selections.length;s++){var c,f=a._selections[s];if("rarest"===a.strategy)for(var d=f.from+f.offset,h=f.to,l=h-d+1,p={},m=0,g=t(d,h,p,i);l>m&&(c=a._rarityMap.getRarestPiece(g),!(0>c));){for(;a._request(e,c,a._critical[c]||n););if(!(e.requests.length<u))return f.priority&&o(s),!0;p[c]=!0,m++}else for(c=f.from+f.offset;c<=f.to;c++)if(e.peerPieces.get(c)&&i(c)){for(;a._request(e,c,a._critical[c]||n););if(!(e.requests.length<u))return f.priority&&o(s),!0}}return!1}var a=this;if(!e.peerChoking){if(!e.downloaded)return n();var c=i(e,Y);if(!(e.requests.length>=c)){var u=i(e,V);s(!1)||s(!0)}}},o.prototype._rechoke=function(){function e(e,t){return e.downloadSpeed!==t.downloadSpeed?t.downloadSpeed-e.downloadSpeed:e.uploadSpeed!==t.uploadSpeed?t.uploadSpeed-e.uploadSpeed:e.wire.amChoking!==t.wire.amChoking?e.wire.amChoking?1:-1:e.salt-t.salt}var t=this;if(t.ready){t._rechokeOptimisticTime>0?t._rechokeOptimisticTime-=1:t._rechokeOptimisticWire=null;var n=[];t.wires.forEach(function(e){e.isSeeder||e===t._rechokeOptimisticWire||n.push({wire:e,downloadSpeed:e.downloadSpeed(),uploadSpeed:e.uploadSpeed(),salt:Math.random(),isChoked:!0})}),n.sort(e);for(var r=0,o=0;o<n.length&&r<t._rechokeNumSlots;++o)n[o].isChoked=!1,n[o].wire.peerInterested&&(r+=1);if(!t._rechokeOptimisticWire&&o<n.length&&t._rechokeNumSlots){var i=n.slice(o).filter(function(e){return e.wire.peerInterested}),s=i[a(i.length)];s&&(s.isChoked=!1,t._rechokeOptimisticWire=s.wire,t._rechokeOptimisticTime=$)}n.forEach(function(e){e.wire.amChoking!==e.isChoked&&(e.isChoked?e.wire.choke():e.wire.unchoke())})}},o.prototype._hotswap=function(e,t){var n=this,r=e.downloadSpeed();if(r<C.BLOCK_LENGTH)return!1;if(!n._reservations[t])return!1;var o=n._reservations[t];if(!o)return!1;var i,s,a=1/0;for(s=0;s<o.length;s++){var c=o[s];if(c&&c!==e){var u=c.downloadSpeed();u>=F||2*u>r||u>a||(i=c,a=u)}}if(!i)return!1;for(s=0;s<o.length;s++)o[s]===i&&(o[s]=null);for(s=0;s<i.requests.length;s++){var f=i.requests[s];f.piece===t&&n.pieces[t].cancel(f.offset/C.BLOCK_LENGTH|0)}return n.emit("hotswap",i,e,t),!0},o.prototype._request=function(e,t,r){function o(){n.nextTick(function(){a._update()})}var a=this,c=e.requests.length,u="webSeed"===e.type;if(a.bitfield.get(t))return!1;var f=u?Math.min(s(e,V,a.pieceLength),a.maxWebConns):i(e,V);if(c>=f)return!1;var d=a.pieces[t],h=u?d.reserveRemaining():d.reserve();if(-1===h&&r&&a._hotswap(e,t)&&(h=u?d.reserveRemaining():d.reserve()),-1===h)return!1;var l=a._reservations[t];l||(l=a._reservations[t]=[]);var p=l.indexOf(null);-1===p&&(p=l.length),l[p]=e;var m=d.chunkOffset(h),g=u?d.chunkLengthRemaining(h):d.chunkLength(h);return e.request(t,m,g,function _(n,r){if(!a.ready)return a.once("ready",function(){_(n,r)});if(l[p]===e&&(l[p]=null),d!==a.pieces[t])return o();if(n)return a._debug("error getting piece %s (offset: %s length: %s) from %s: %s",t,m,g,e.remoteAddress+":"+e.remotePort,n.message),u?d.cancelRemaining(h):d.cancel(h),void o();if(a._debug("got piece %s (offset: %s length: %s) from %s",t,m,g,e.remoteAddress+":"+e.remotePort),!d.set(h,r,e))return o();var i=d.flush();R(i,function(e){if(e===a._hashes[t]){if(!a.pieces[t])return;a._debug("piece verified %s",t),a.pieces[t]=null,a._reservations[t]=null,a.bitfield.set(t,!0),a.store.put(t,i),a.wires.forEach(function(e){e.have(t)}),a._checkDone()}else a.pieces[t]=new C(d.length),a.emit("warning",new Error("Piece "+t+" failed verification"));o()})}),!0},o.prototype._checkDone=function(){var e=this;if(!e.destroyed){e.files.forEach(function(t){if(!t.done){for(var n=t._startPiece;n<=t._endPiece;++n)if(!e.bitfield.get(n))return;t.done=!0,t.emit("done"),e._debug("file done: "+t.name)}});for(var t=!0,n=0;n<e._selections.length;n++){for(var r=e._selections[n],o=r.from;o<=r.to;o++)if(!e.bitfield.get(o)){t=!1;break}if(!t)break}!e.done&&t&&(e.done=!0,e._debug("torrent done: "+e.infoHash),e.discovery.tracker&&e.discovery.tracker.complete(),e.emit("done")),e._gcSelections()}},o.prototype.load=function(e,t){var n=this;if(n.destroyed)throw new Error("torrent is destroyed");if(!n.ready)return n.once("ready",function(){n.load(e,t)});Array.isArray(e)||(e=[e]),t||(t=c);var r=new w(e),o=new d(n.store,n.pieceLength);T(r,o,function(e){return e?t(e):(n.pieces.forEach(function(e,t){n.pieces[t]=null,n._reservations[t]=null,n.bitfield.set(t,!0)}),n._checkDone(),void t(null))})},o.prototype.createServer=function(e){if("function"!=typeof q)throw new Error("node.js-only method");if(this.destroyed)throw new Error("torrent is destroyed");var t=new q(this,e);return this._servers.push(t),t},o.prototype.pause=function(){this.destroyed||(this._debug("pause"),this.paused=!0)},o.prototype.resume=function(){this.destroyed||(this._debug("resume"),this.paused=!1,this._drain())},o.prototype._debug=function(){var e=[].slice.call(arguments);e[0]="["+this._debugId+"] "+e[0],h.apply(null,e)},o.prototype._drain=function(){var e=this;if(this._debug("_drain numConns %s maxConns %s",e._numConns,e.client.maxConns),!("function"!=typeof E.connect||e.destroyed||e.paused||e._numConns>=e.client.maxConns)){this._debug("drain (%s queued, %s/%s peers)",e._numQueued,e.numPeers,e.client.maxConns);var t=e._queue.shift();if(t){this._debug("tcp connect attempt to %s",t.addr);var n=u(t.addr),r={host:n[0],port:n[1]},o=t.conn=E.connect(r);o.once("connect",function(){t.onConnect()}),o.once("error",function(e){t.destroy(e)}),t.startConnectTimeout(),o.on("close",function(){if(!e.destroyed){if(t.retries>=X.length)return void e._debug("conn %s closed: will not re-add (max %s attempts)",t.addr,X.length);var n=X[t.retries];e._debug("conn %s closed: will re-add to queue in %sms (attempt %s)",t.addr,n,t.retries+1);var r=setTimeout(function(){var n=e._addPeer(t.addr);n&&(n.retries=t.retries+1)},n);r.unref&&r.unref()}})}}},o.prototype._validAddr=function(e){var t;try{t=u(e)}catch(n){return!1}var r=t[0],o=t[1];return o>0&&65535>o&&!("127.0.0.1"===r&&o===this.client.torrentPort)}}).call(this,e("_process"),"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"./file":2,"./peer":3,"./rarity-map":4,"./server":22,_process:31,"addr-to-ip-port":7,bitfield:8,"chunk-store-stream/write":46,debug:64,events:27,fs:21,"fs-chunk-store":73,"immediate-chunk-store":71,inherits:72,multistream:74,net:22,os:22,"parse-torrent":75,path:30,"path-exists":22,pump:85,"random-iterate":88,"run-parallel":118,"run-parallel-limit":117,"simple-sha1":127,speedometer:129,"torrent-discovery":136,"torrent-piece":137,uniq:138,ut_metadata:140,ut_pex:22,xtend:145,"xtend/mutable":146}],6:[function(e,t,n){(function(n){function r(e,t){u.call(this),this.url=e,this.webPeerId=c.sync(e),this._torrent=t,this._init()}t.exports=r;var o=e("bitfield"),i=e("debug")("webtorrent:webconn"),s=e("simple-get"),a=e("inherits"),c=e("simple-sha1"),u=e("bittorrent-protocol");a(r,u),r.prototype._init=function(){var e=this;
+e.setKeepAlive(!0),e.once("handshake",function(t,n){if(!e.destroyed){e.handshake(t,e.webPeerId);for(var r=e._torrent.pieces.length,i=new o(r),s=0;r>=s;s++)i.set(s,!0);e.bitfield(i)}}),e.once("interested",function(){i("interested"),e.unchoke()}),e.on("uninterested",function(){i("uninterested")}),e.on("choke",function(){i("choke")}),e.on("unchoke",function(){i("unchoke")}),e.on("bitfield",function(){i("bitfield")}),e.on("request",function(t,n,r,o){i("request pieceIndex=%d offset=%d length=%d",t,n,r),e.httpRequest(t,n,r,o)})},r.prototype.httpRequest=function(e,t,r,o){var a,c=this,u=e*c._torrent.pieceLength,f=u+t,d=f+r-1,h=c._torrent.files;if(h.length<=1)a=[{url:c.url,start:f,end:d}];else{var l=h.filter(function(e){return e.offset<=d&&e.offset+e.length>f});if(l.length<1)return o(new Error("Could not find file corresponnding to web seed range request"));a=l.map(function(e){var t=e.offset+e.length-1,n=c.url+("/"===c.url[c.url.length-1]?"":"/")+e.path;return{url:n,fileOffsetInRange:Math.max(e.offset-f,0),start:Math.max(f-e.offset,0),end:Math.min(t,d-e.offset)}})}var p=0,m=!1;if(a.length>1)var g=new n(r);a.forEach(function(n){var c=n.url,u=n.start,f=n.end;i("Requesting url=%s pieceIndex=%d offset=%d length=%d start=%d end=%d",c,e,t,r,u,f);var d={url:c,method:"GET",headers:{"user-agent":"WebTorrent (http://webtorrent.io)",range:"bytes="+u+"-"+f}};s.concat(d,function(e,t,r){if(!m){if(e)return m=!0,o(e);if(t.statusCode<200||t.statusCode>=300)return m=!0,o(new Error("Unexpected HTTP status code "+t.statusCode));if(i("Got data of length %d",r.length),1===a.length)return o(null,r);r.copy(g,n.fileOffsetInRange),++p===a.length&&o(null,g)}})})},r.prototype.destroy=function(){u.prototype.destroy.call(this),this._torrent=null}}).call(this,e("buffer").Buffer)},{bitfield:8,"bittorrent-protocol":9,buffer:23,debug:64,inherits:72,"simple-get":120,"simple-sha1":127}],7:[function(e,t,n){var r=/^\[?([^\]]+)\]?:(\d+)$/,o={},i=0;t.exports=function(e){if(1e5===i&&t.exports.reset(),!o[e]){var n=r.exec(e);if(!n)throw new Error("invalid addr: "+e);o[e]=[n[1],Number(n[2])],i+=1}return o[e]},t.exports.reset=function(){o={},i=0}},{}],8:[function(e,t,n){(function(e){function n(e,t){return this instanceof n?(0===arguments.length&&(e=0),this.grow=t&&(isFinite(t.grow)&&r(t.grow)||t.grow)||0,"number"!=typeof e&&void 0!==e||(e=new o(r(e)),e.fill&&!e._isBuffer&&e.fill(0)),void(this.buffer=e)):new n(e,t)}function r(e){var t=e>>3;return e%8!==0&&t++,t}var o="undefined"!=typeof e?e:"undefined"!=typeof Int8Array?Int8Array:function(e){for(var t=new Array(e),n=0;e>n;n++)t[n]=0};n.prototype.get=function(e){var t=e>>3;return t<this.buffer.length&&!!(this.buffer[t]&128>>e%8)},n.prototype.set=function(e,t){var n=e>>3;t||1===arguments.length?(this.buffer.length<n+1&&this._grow(Math.max(n+1,Math.min(2*this.buffer.length,this.grow))),this.buffer[n]|=128>>e%8):n<this.buffer.length&&(this.buffer[n]&=~(128>>e%8))},n.prototype._grow=function(e){if(this.buffer.length<e&&e<=this.grow){var t=new o(e);if(t.fill&&t.fill(0),this.buffer.copy)this.buffer.copy(t,0);else for(var n=0;n<this.buffer.length;n++)t[n]=this.buffer[n];this.buffer=t}},"undefined"!=typeof t&&(t.exports=n)}).call(this,e("buffer").Buffer)},{buffer:23}],9:[function(e,t,n){(function(n){function r(e,t,n,r){this.piece=e,this.offset=t,this.length=n,this.callback=r}function o(){return this instanceof o?(l.Duplex.call(this),this._debugId=f(32),this._debug("new wire"),this.peerId=null,this.peerIdBuffer=null,this.type=null,this.amChoking=!0,this.amInterested=!1,this.peerChoking=!0,this.peerInterested=!1,this.peerPieces=new a(0,{grow:p}),this.peerExtensions={},this.requests=[],this.peerRequests=[],this.extendedMapping={},this.peerExtendedMapping={},this.extendedHandshake={},this.peerExtendedHandshake={},this._ext={},this._nextExt=1,this.uploaded=0,this.downloaded=0,this.uploadSpeed=h(),this.downloadSpeed=h(),this._keepAliveInterval=null,this._timeout=null,this._timeoutMs=0,this.destroyed=!1,this._finished=!1,this._parserSize=0,this._parser=null,this._buffer=[],this._bufferSize=0,this.on("finish",this._onFinish),void this._parseHandshake()):new o}function i(e,t,n,r){for(var o=0;o<e.length;o++){var i=e[o];if(i.piece===t&&i.offset===n&&i.length===r)return 0===o?e.shift():e.splice(o,1),i}return null}t.exports=o;var s=e("bencode"),a=e("bitfield"),c=e("debug")("bittorrent-protocol"),u=e("xtend"),f=e("hat"),d=e("inherits"),h=e("speedometer"),l=e("readable-stream"),p=4e5,m=55e3,g=new n("BitTorrent protocol"),_=new n([0,0,0,0]),y=new n([0,0,0,1,0]),v=new n([0,0,0,1,1]),b=new n([0,0,0,1,2]),w=new n([0,0,0,1,3]),E=[0,0,0,0,0,0,0,0],k=[0,0,0,3,9,0,0];d(o,l.Duplex),o.prototype.setKeepAlive=function(e){var t=this;t._debug("setKeepAlive %s",e),clearInterval(t._keepAliveInterval),e!==!1&&(t._keepAliveInterval=setInterval(function(){t.keepAlive()},m))},o.prototype.setTimeout=function(e,t){this._debug("setTimeout ms=%d unref=%s",e,t),this._clearTimeout(),this._timeoutMs=e,this._timeoutUnref=!!t,this._updateTimeout()},o.prototype.destroy=function(){this.destroyed||(this.destroyed=!0,this._debug("destroy"),this.emit("close"),this.end())},o.prototype.end=function(){this._debug("end"),this._onUninterested(),this._onChoke(),l.Duplex.prototype.end.apply(this,arguments)},o.prototype.use=function(e){function t(){}var n=e.prototype.name;if(!n)throw new Error('Extension class requires a "name" property on the prototype');this._debug("use extension.name=%s",n);var r=this._nextExt,o=new e(this);"function"!=typeof o.onHandshake&&(o.onHandshake=t),"function"!=typeof o.onExtendedHandshake&&(o.onExtendedHandshake=t),"function"!=typeof o.onMessage&&(o.onMessage=t),this.extendedMapping[r]=n,this._ext[n]=o,this[n]=o,this._nextExt+=1},o.prototype.keepAlive=function(){this._debug("keep-alive"),this._push(_)},o.prototype.handshake=function(e,t,r){var o,i;if("string"==typeof e?o=new n(e,"hex"):(o=e,e=o.toString("hex")),"string"==typeof t?i=new n(t,"hex"):(i=t,t=i.toString("hex")),20!==o.length||20!==i.length)throw new Error("infoHash and peerId MUST have length 20");this._debug("handshake i=%s p=%s exts=%o",e,t,r);var s=new n(E);s[5]|=16,r&&r.dht&&(s[7]|=1),this._push(n.concat([g,s,o,i])),this._handshakeSent=!0,this.peerExtensions.extended&&!this._extendedHandshakeSent&&this._sendExtendedHandshake()},o.prototype._sendExtendedHandshake=function(){var e=u(this.extendedHandshake);e.m={};for(var t in this.extendedMapping){var n=this.extendedMapping[t];e.m[n]=Number(t)}this.extended(0,s.encode(e)),this._extendedHandshakeSent=!0},o.prototype.choke=function(){this.amChoking||(this.amChoking=!0,this._debug("choke"),this.peerRequests.splice(0,this.peerRequests.length),this._push(y))},o.prototype.unchoke=function(){this.amChoking&&(this.amChoking=!1,this._debug("unchoke"),this._push(v))},o.prototype.interested=function(){this.amInterested||(this.amInterested=!0,this._debug("interested"),this._push(b))},o.prototype.uninterested=function(){this.amInterested&&(this.amInterested=!1,this._debug("uninterested"),this._push(w))},o.prototype.have=function(e){this._debug("have %d",e),this._message(4,[e],null)},o.prototype.bitfield=function(e){this._debug("bitfield"),n.isBuffer(e)||(e=e.buffer),this._message(5,[],e)},o.prototype.request=function(e,t,n,o){return o||(o=function(){}),this._finished?o(new Error("wire is closed")):this.peerChoking?o(new Error("peer is choking")):(this._debug("request index=%d offset=%d length=%d",e,t,n),this.requests.push(new r(e,t,n,o)),this._updateTimeout(),void this._message(6,[e,t,n],null))},o.prototype.piece=function(e,t,n){this._debug("piece index=%d offset=%d",e,t),this.uploaded+=n.length,this.uploadSpeed(n.length),this.emit("upload",n.length),this._message(7,[e,t],n)},o.prototype.cancel=function(e,t,n){this._debug("cancel index=%d offset=%d length=%d",e,t,n),this._callback(i(this.requests,e,t,n),new Error("request was cancelled"),null),this._message(8,[e,t,n],null)},o.prototype.port=function(e){this._debug("port %d",e);var t=new n(k);t.writeUInt16BE(e,5),this._push(t)},o.prototype.extended=function(e,t){if(this._debug("extended ext=%s",e),"string"==typeof e&&this.peerExtendedMapping[e]&&(e=this.peerExtendedMapping[e]),"number"!=typeof e)throw new Error("Unrecognized extension: "+e);var r=new n([e]),o=n.isBuffer(t)?t:s.encode(t);this._message(20,[],n.concat([r,o]))},o.prototype._read=function(){},o.prototype._message=function(e,t,r){var o=r?r.length:0,i=new n(5+4*t.length);i.writeUInt32BE(i.length+o-4,0),i[4]=e;for(var s=0;s<t.length;s++)i.writeUInt32BE(t[s],5+4*s);this._push(i),r&&this._push(r)},o.prototype._push=function(e){return this._finished?void 0:this.push(e)},o.prototype._onKeepAlive=function(){this._debug("got keep-alive"),this.emit("keep-alive")},o.prototype._onHandshake=function(e,t,n){var r=e.toString("hex"),o=t.toString("hex");this._debug("got handshake i=%s p=%s exts=%o",r,o,n),this.peerId=o,this.peerIdBuffer=t,this.peerExtensions=n,this.emit("handshake",r,o,n);var i;for(i in this._ext)this._ext[i].onHandshake(r,o,n);n.extended&&this._handshakeSent&&!this._extendedHandshakeSent&&this._sendExtendedHandshake()},o.prototype._onChoke=function(){for(this.peerChoking=!0,this._debug("got choke"),this.emit("choke");this.requests.length;)this._callback(this.requests.shift(),new Error("peer is choking"),null)},o.prototype._onUnchoke=function(){this.peerChoking=!1,this._debug("got unchoke"),this.emit("unchoke")},o.prototype._onInterested=function(){this.peerInterested=!0,this._debug("got interested"),this.emit("interested")},o.prototype._onUninterested=function(){this.peerInterested=!1,this._debug("got uninterested"),this.emit("uninterested")},o.prototype._onHave=function(e){this.peerPieces.get(e)||(this._debug("got have %d",e),this.peerPieces.set(e,!0),this.emit("have",e))},o.prototype._onBitField=function(e){this.peerPieces=new a(e),this._debug("got bitfield"),this.emit("bitfield",this.peerPieces)},o.prototype._onRequest=function(e,t,n){var o=this;if(!o.amChoking){o._debug("got request index=%d offset=%d length=%d",e,t,n);var s=function(r,s){return a===i(o.peerRequests,e,t,n)?r?o._debug("error satisfying request index=%d offset=%d length=%d (%s)",e,t,n,r.message):void o.piece(e,t,s):void 0},a=new r(e,t,n,s);o.peerRequests.push(a),o.emit("request",e,t,n,s)}},o.prototype._onPiece=function(e,t,n){this._debug("got piece index=%d offset=%d",e,t),this._callback(i(this.requests,e,t,n.length),null,n),this.downloaded+=n.length,this.downloadSpeed(n.length),this.emit("download",n.length),this.emit("piece",e,t,n)},o.prototype._onCancel=function(e,t,n){this._debug("got cancel index=%d offset=%d length=%d",e,t,n),i(this.peerRequests,e,t,n),this.emit("cancel",e,t,n)},o.prototype._onPort=function(e){this._debug("got port %d",e),this.emit("port",e)},o.prototype._onExtended=function(e,t){if(0===e){var n;try{n=s.decode(t)}catch(r){this._debug("ignoring invalid extended handshake: %s",r.message||r)}if(!n)return;this.peerExtendedHandshake=n;var o;if("object"==typeof n.m)for(o in n.m)this.peerExtendedMapping[o]=Number(n.m[o].toString());for(o in this._ext)this.peerExtendedMapping[o]&&this._ext[o].onExtendedHandshake(this.peerExtendedHandshake);this._debug("got extended handshake"),this.emit("extended","handshake",this.peerExtendedHandshake)}else this.extendedMapping[e]&&(e=this.extendedMapping[e],this._ext[e]&&this._ext[e].onMessage(t)),this._debug("got extended message ext=%s",e),this.emit("extended",e,t)},o.prototype._onTimeout=function(){this._debug("request timed out"),this._callback(this.requests.shift(),new Error("request has timed out"),null),this.emit("timeout")},o.prototype._write=function(e,t,r){for(this._bufferSize+=e.length,this._buffer.push(e);this._bufferSize>=this._parserSize;){var o=1===this._buffer.length?this._buffer[0]:n.concat(this._buffer);this._bufferSize-=this._parserSize,this._buffer=this._bufferSize?[o.slice(this._parserSize)]:[],this._parser(o.slice(0,this._parserSize))}r(null)},o.prototype._callback=function(e,t,n){e&&(this._clearTimeout(),this.peerChoking||this._finished||this._updateTimeout(),e.callback(t,n))},o.prototype._clearTimeout=function(){this._timeout&&(clearTimeout(this._timeout),this._timeout=null)},o.prototype._updateTimeout=function(){var e=this;e._timeoutMs&&e.requests.length&&!e._timeout&&(e._timeout=setTimeout(function(){e._onTimeout()},e._timeoutMs),e._timeoutUnref&&e._timeout.unref&&e._timeout.unref())},o.prototype._parse=function(e,t){this._parserSize=e,this._parser=t},o.prototype._onMessageLength=function(e){var t=e.readUInt32BE(0);t>0?this._parse(t,this._onMessage):(this._onKeepAlive(),this._parse(4,this._onMessageLength))},o.prototype._onMessage=function(e){switch(this._parse(4,this._onMessageLength),e[0]){case 0:return this._onChoke();case 1:return this._onUnchoke();case 2:return this._onInterested();case 3:return this._onUninterested();case 4:return this._onHave(e.readUInt32BE(1));case 5:return this._onBitField(e.slice(1));case 6:return this._onRequest(e.readUInt32BE(1),e.readUInt32BE(5),e.readUInt32BE(9));case 7:return this._onPiece(e.readUInt32BE(1),e.readUInt32BE(5),e.slice(9));case 8:return this._onCancel(e.readUInt32BE(1),e.readUInt32BE(5),e.readUInt32BE(9));case 9:return this._onPort(e.readUInt16BE(1));case 20:return this._onExtended(e.readUInt8(1),e.slice(2));default:return this._debug("got unknown message"),this.emit("unknownmessage",e)}},o.prototype._parseHandshake=function(){var e=this;e._parse(1,function(t){var n=t.readUInt8(0);e._parse(n+48,function(t){var r=t.slice(0,n);return"BitTorrent protocol"!==r.toString()?(e._debug("Error: wire not speaking BitTorrent protocol (%s)",r.toString()),void e.end()):(t=t.slice(n),e._onHandshake(t.slice(8,28),t.slice(28,48),{dht:!!(1&t[7]),extended:!!(16&t[5])}),void e._parse(4,e._onMessageLength))})})},o.prototype._onFinish=function(){for(this._finished=!0,this.push(null);this.read(););for(clearInterval(this._keepAliveInterval),this._parse(Number.MAX_VALUE,function(){}),this.peerRequests=[];this.requests.length;)this._callback(this.requests.shift(),new Error("wire was closed"),null)},o.prototype._debug=function(){var e=[].slice.call(arguments);e[0]="["+this._debugId+"] "+e[0],c.apply(null,e)}}).call(this,e("buffer").Buffer)},{bencode:10,bitfield:8,buffer:23,debug:64,hat:70,inherits:72,"readable-stream":99,speedometer:129,xtend:145}],10:[function(e,t,n){var r=t.exports;r.encode=e("./lib/encode"),r.decode=e("./lib/decode"),r.byteLength=r.encodingLength=function(e){return r.encode(e).length}},{"./lib/decode":11,"./lib/encode":13}],11:[function(e,t,n){(function(n){function r(e,t,o,i){return"number"!=typeof t&&null==i&&(i=t,t=void 0),"number"!=typeof o&&null==i&&(i=o,o=void 0),r.position=0,r.encoding=i||null,r.data=n.isBuffer(e)?e.slice(t,o):new n(e),r.bytes=r.data.length,r.next()}var o=e("./dict");r.bytes=0,r.position=0,r.data=null,r.encoding=null,r.next=function(){switch(r.data[r.position]){case 100:return r.dictionary();case 108:return r.list();case 105:return r.integer();default:return r.buffer()}},r.find=function(e){for(var t=r.position,n=r.data.length,o=r.data;n>t;){if(o[t]===e)return t;t++}throw new Error('Invalid data: Missing delimiter "'+String.fromCharCode(e)+'" [0x'+e.toString(16)+"]")},r.dictionary=function(){r.position++;for(var e=new o;101!==r.data[r.position];)e.binarySet(r.buffer(),r.next());return r.position++,e},r.list=function(){r.position++;for(var e=[];101!==r.data[r.position];)e.push(r.next());return r.position++,e},r.integer=function(){var e=r.find(101),t=r.data.toString("ascii",r.position+1,e);return r.position+=e+1-r.position,parseInt(t,10)},r.buffer=function(){var e=r.find(58),t=parseInt(r.data.toString("ascii",r.position,e),10),n=++e+t;return r.position=n,r.encoding?r.data.toString(r.encoding,e,n):r.data.slice(e,n)},t.exports=r}).call(this,e("buffer").Buffer)},{"./dict":12,buffer:23}],12:[function(e,t,n){var r=t.exports=function(){Object.defineProperty(this,"_keys",{enumerable:!1,value:[]})};r.prototype.binaryKeys=function(){return this._keys.slice()},r.prototype.binarySet=function(e,t){this._keys.push(e),this[e]=t}},{}],13:[function(e,t,n){(function(e){function n(t,r,o){var i=[],s=null;return n._encode(i,t),s=e.concat(i),n.bytes=s.length,e.isBuffer(r)?(s.copy(r,o),r):s}n.bytes=-1,n._floatConversionDetected=!1,n._encode=function(t,r){if(e.isBuffer(r))return t.push(new e(r.length+":")),void t.push(r);switch(typeof r){case"string":n.buffer(t,r);break;case"number":n.number(t,r);break;case"object":r.constructor===Array?n.list(t,r):n.dict(t,r);break;case"boolean":n.number(t,r?1:0)}};var r=new e("e"),o=new e("d"),i=new e("l");n.buffer=function(t,n){t.push(new e(e.byteLength(n)+":"+n))},n.number=function(t,r){var o=2147483648,i=r/o<<0,s=r%o<<0,a=i*o+s;t.push(new e("i"+a+"e")),a===r||n._floatConversionDetected||(n._floatConversionDetected=!0,console.warn('WARNING: Possible data corruption detected with value "'+r+'":','Bencoding only defines support for integers, value was converted to "'+a+'"'),console.trace())},n.dict=function(e,t){e.push(o);for(var i,s=0,a=Object.keys(t).sort(),c=a.length;c>s;s++)i=a[s],n.buffer(e,i),n._encode(e,t[i]);e.push(r)},n.list=function(e,t){var o=0,s=t.length;for(e.push(i);s>o;o++)n._encode(e,t[o]);e.push(r)},t.exports=n}).call(this,e("buffer").Buffer)},{buffer:23}],14:[function(e,t,n){(function(n,r){function o(e){function t(e){n.nextTick(function(){a.emit("warning",e)})}var a=this;if(!(a instanceof o))return new o(e);if(s.call(a),e||(e={}),!e.peerId)throw new Error("Option `peerId` is required");if(!e.infoHash)throw new Error("Option `infoHash` is required");if(!e.announce)throw new Error("Option `announce` is required");if(!n.browser&&!e.port)throw new Error("Option `port` is required");a.peerId="string"==typeof e.peerId?e.peerId:e.peerId.toString("hex"),a._peerIdBuffer=new r(a.peerId,"hex"),a._peerIdBinary=a._peerIdBuffer.toString("binary"),a.infoHash="string"==typeof e.infoHash?e.infoHash:e.infoHash.toString("hex"),a._infoHashBuffer=new r(a.infoHash,"hex"),a._infoHashBinary=a._infoHashBuffer.toString("binary"),a._port=e.port,a.destroyed=!1,a._rtcConfig=e.rtcConfig,a._wrtc=e.wrtc,a._getAnnounceOpts=e.getAnnounceOpts,i("new client %s",a.infoHash);var c=!!a._wrtc||"undefined"!=typeof window,u="string"==typeof e.announce?[e.announce]:null==e.announce?[]:e.announce;u=u.map(function(e){return e=e.toString(),"/"===e[e.length-1]&&(e=e.substring(0,e.length-1)),e}),u=d(u),a._trackers=u.map(function(e){var n=h.parse(e).protocol;return"http:"!==n&&"https:"!==n||"function"!=typeof p?"udp:"===n&&"function"==typeof m?new m(a,e):"ws:"!==n&&"wss:"!==n||!c?(t(new Error("Unsupported tracker protocol: "+e)),null):"ws:"===n&&"undefined"!=typeof window&&"https:"===window.location.protocol?(t(new Error("Unsupported tracker protocol: "+e)),null):new g(a,e):new p(a,e)}).filter(Boolean)}t.exports=o;var i=e("debug")("bittorrent-tracker"),s=e("events").EventEmitter,a=e("xtend"),c=e("inherits"),u=e("once"),f=e("run-parallel"),d=e("uniq"),h=e("url"),l=e("./lib/common"),p=e("./lib/client/http-tracker"),m=e("./lib/client/udp-tracker"),g=e("./lib/client/websocket-tracker");c(o,s),o.scrape=function(e,t){if(t=u(t),!e.infoHash)throw new Error("Option `infoHash` is required");if(!e.announce)throw new Error("Option `announce` is required");var n=a(e,{infoHash:Array.isArray(e.infoHash)?e.infoHash[0]:e.infoHash,peerId:new r("01234567890123456789"),port:6881}),i=new o(n);i.once("error",t);var s=Array.isArray(e.infoHash)?e.infoHash.length:1,c={};return i.on("scrape",function(e){if(s-=1,c[e.infoHash]=e,0===s){i.destroy();var n=Object.keys(c);1===n.length?t(null,c[n[0]]):t(null,c)}}),e.infoHash=Array.isArray(e.infoHash)?e.infoHash.map(function(e){return new r(e,"hex")}):new r(e.infoHash,"hex"),i.scrape({infoHash:e.infoHash}),i},o.prototype.start=function(e){var t=this;i("send `start`"),e=t._defaultAnnounceOpts(e),e.event="started",t._announce(e),t._trackers.forEach(function(e){e.setInterval()})},o.prototype.stop=function(e){var t=this;i("send `stop`"),e=t._defaultAnnounceOpts(e),e.event="stopped",t._announce(e)},o.prototype.complete=function(e){var t=this;i("send `complete`"),e||(e={}),e=t._defaultAnnounceOpts(e),e.event="completed",t._announce(e)},o.prototype.update=function(e){var t=this;i("send `update`"),e=t._defaultAnnounceOpts(e),e.event&&delete e.event,t._announce(e)},o.prototype._announce=function(e){var t=this;t._trackers.forEach(function(t){t.announce(e)})},o.prototype.scrape=function(e){var t=this;i("send `scrape`"),e||(e={}),t._trackers.forEach(function(t){t.scrape(e)})},o.prototype.setInterval=function(e){var t=this;i("setInterval %d",e),t._trackers.forEach(function(t){t.setInterval(e)})},o.prototype.destroy=function(e){var t=this;if(!t.destroyed){t.destroyed=!0,i("destroy");var n=t._trackers.map(function(e){return function(t){e.destroy(t)}});f(n,e),t._trackers=[],t._getAnnounceOpts=null}},o.prototype._defaultAnnounceOpts=function(e){var t=this;return e||(e={}),null==e.numwant&&(e.numwant=l.DEFAULT_ANNOUNCE_PEERS),null==e.uploaded&&(e.uploaded=0),null==e.downloaded&&(e.downloaded=0),t._getAnnounceOpts&&(e=a(e,t._getAnnounceOpts())),e}}).call(this,e("_process"),e("buffer").Buffer)},{"./lib/client/http-tracker":22,"./lib/client/udp-tracker":22,"./lib/client/websocket-tracker":16,"./lib/common":17,_process:31,buffer:23,debug:64,events:27,inherits:72,once:19,"run-parallel":118,uniq:138,url:42,xtend:145}],15:[function(e,t,n){function r(e,t){var n=this;o.call(n),n.client=e,n.announceUrl=t,n.interval=null,n.destroyed=!1}t.exports=r;var o=e("events").EventEmitter,i=e("inherits");i(r,o),r.prototype.setInterval=function(e){var t=this;null==e&&(e=t.DEFAULT_ANNOUNCE_INTERVAL),clearInterval(t.interval),e&&(t.interval=setInterval(function(){t.announce(t.client._defaultAnnounceOpts())},e),t.interval.unref&&t.interval.unref())}},{events:27,inherits:72}],16:[function(e,t,n){function r(e,t,n){var r=this;h.call(r,e,t),i("new websocket tracker %s",t),r.peers={},r.socket=null,r.reconnecting=!1,r.retries=0,r.reconnectTimer=null,r._openSocket()}function o(){}t.exports=r;var i=e("debug")("bittorrent-tracker:websocket-tracker"),s=e("xtend"),a=e("hat"),c=e("inherits"),u=e("simple-peer"),f=e("simple-websocket"),d=e("../common"),h=e("./tracker"),l={},p=15e3,m=18e5,g=3e4,_=5e4;c(r,h),r.prototype.DEFAULT_ANNOUNCE_INTERVAL=3e4,r.prototype.announce=function(e){var t=this;if(!t.destroyed&&!t.reconnecting){if(!t.socket.connected)return void t.socket.once("connect",function(){t.announce(e)});var n=s(e,{action:"announce",info_hash:t.client._infoHashBinary,peer_id:t.client._peerIdBinary});if(t._trackerId&&(n.trackerid=t._trackerId),"stopped"===e.event)t._send(n);else{var r=Math.min(e.numwant,5);t._generateOffers(r,function(e){n.numwant=r,n.offers=e,t._send(n)})}}},r.prototype.scrape=function(e){var t=this;if(!t.destroyed&&!t.reconnecting){if(!t.socket.connected)return void t.socket.once("connect",function(){t.scrape(e)});var n=Array.isArray(e.infoHash)&&e.infoHash.length>0?e.infoHash.map(function(e){return e.toString("binary")}):e.infoHash&&e.infoHash.toString("binary")||t.client._infoHashBinary,r={action:"scrape",info_hash:n};t._send(r)}},r.prototype.destroy=function(e){var t=this;if(e||(e=o),t.destroyed)return e(null);t.destroyed=!0,clearInterval(t.interval),clearTimeout(t.reconnectTimer),t.socket&&(t.socket.removeListener("connect",t._onSocketConnectBound),t.socket.removeListener("data",t._onSocketDataBound),t.socket.removeListener("close",t._onSocketCloseBound),t.socket.removeListener("error",t._onSocketErrorBound)),t._onSocketConnectBound=null,t._onSocketErrorBound=null,t._onSocketDataBound=null,t._onSocketCloseBound=null;for(var n in t.peers){var r=t.peers[n];clearTimeout(r.trackerTimeout),r.destroy()}if(t.peers=null,l[t.announceUrl]&&(l[t.announceUrl].consumers-=1),0===l[t.announceUrl].consumers){delete l[t.announceUrl];try{t.socket.on("error",o),t.socket.destroy(e)}catch(i){e(null)}}else e(null);t.socket=null},r.prototype._openSocket=function(){var e=this;e.destroyed=!1,e.peers||(e.peers={}),e._onSocketConnectBound=function(){e._onSocketConnect()},e._onSocketErrorBound=function(t){e._onSocketError(t)},e._onSocketDataBound=function(t){e._onSocketData(t)},e._onSocketCloseBound=function(){e._onSocketClose()},e.socket=l[e.announceUrl],e.socket?l[e.announceUrl].consumers+=1:(e.socket=l[e.announceUrl]=new f(e.announceUrl),e.socket.consumers=1,e.socket.on("connect",e._onSocketConnectBound)),e.socket.on("data",e._onSocketDataBound),e.socket.on("close",e._onSocketCloseBound),e.socket.on("error",e._onSocketErrorBound)},r.prototype._onSocketConnect=function(){var e=this;e.destroyed||e.reconnecting&&(e.reconnecting=!1,e.retries=0,e.announce(e.client._defaultAnnounceOpts()))},r.prototype._onSocketData=function(e){var t=this;if(!t.destroyed){try{e=JSON.parse(e)}catch(n){return void t.client.emit("warning",new Error("Invalid tracker response"))}"announce"===e.action?t._onAnnounceResponse(e):"scrape"===e.action?t._onScrapeResponse(e):t._onSocketError(new Error("invalid action in WS response: "+e.action))}},r.prototype._onAnnounceResponse=function(e){var t=this;if(e.info_hash!==t.client._infoHashBinary)return void i("ignoring websocket data from %s for %s (looking for %s: reused socket)",t.announceUrl,d.binaryToHex(e.info_hash),t.client.infoHash);if(!e.peer_id||e.peer_id!==t.client._peerIdBinary){i("received %s from %s for %s",JSON.stringify(e),t.announceUrl,t.client.infoHash);var n=e["failure reason"];if(n)return t.client.emit("warning",new Error(n));var r=e["warning message"];r&&t.client.emit("warning",new Error(r));var o=e.interval||e["min interval"];o&&t.setInterval(1e3*o);var s=e["tracker id"];s&&(t._trackerId=s),null!=e.complete&&t.client.emit("update",{announce:t.announceUrl,complete:e.complete,incomplete:e.incomplete});var a;if(e.offer&&e.peer_id&&(i("creating peer (from remote offer)"),a=new u({trickle:!1,config:t.client._rtcConfig,wrtc:t.client._wrtc}),a.id=d.binaryToHex(e.peer_id),a.once("signal",function(n){var r={action:"announce",info_hash:t.client._infoHashBinary,peer_id:t.client._peerIdBinary,to_peer_id:e.peer_id,answer:n,offer_id:e.offer_id};t._trackerId&&(r.trackerid=t._trackerId),t._send(r)}),a.signal(e.offer),t.client.emit("peer",a)),e.answer&&e.peer_id){var c=d.binaryToHex(e.offer_id);a=t.peers[c],a?(a.id=d.binaryToHex(e.peer_id),a.signal(e.answer),t.client.emit("peer",a),clearTimeout(a.trackerTimeout),a.trackerTimeout=null,delete t.peers[c]):i("got unexpected answer: "+JSON.stringify(e.answer))}}},r.prototype._onScrapeResponse=function(e){var t=this;e=e.files||{};var n=Object.keys(e);return 0===n.length?void t.client.emit("warning",new Error("invalid scrape response")):void n.forEach(function(n){var r=e[n];t.client.emit("scrape",{announce:t.announceUrl,infoHash:d.binaryToHex(n),complete:r.complete,incomplete:r.incomplete,downloaded:r.downloaded})})},r.prototype._onSocketClose=function(){var e=this;e.destroyed||(e.destroy(),e._startReconnectTimer())},r.prototype._onSocketError=function(e){var t=this;t.destroyed||(t.destroy(),t.client.emit("warning",e),t._startReconnectTimer())},r.prototype._startReconnectTimer=function(){var e=this,t=Math.floor(Math.random()*g)+Math.min(Math.pow(2,e.retries)*p,m);e.reconnecting=!0,clearTimeout(e.reconnectTimer),e.reconnectTimer=setTimeout(function(){e.retries++,e._openSocket()},t),e.reconnectTimer.unref&&e.reconnectTimer.unref(),i("reconnecting socket in %s ms",t)},r.prototype._send=function(e){var t=this;if(!t.destroyed){var n=JSON.stringify(e);i("send %s",n),t.socket.send(n)}},r.prototype._generateOffers=function(e,t){function n(){var e=a(160);i("creating peer (from _generateOffers)");var t=o.peers[e]=new u({initiator:!0,trickle:!1,config:o.client._rtcConfig,wrtc:o.client._wrtc});t.once("signal",function(t){s.push({offer:t,offer_id:d.hexToBinary(e)}),r()}),t.trackerTimeout=setTimeout(function(){i("tracker timeout: destroying peer"),t.trackerTimeout=null,delete o.peers[e],t.destroy()},_),t.trackerTimeout.unref&&t.trackerTimeout.unref()}function r(){s.length===e&&(i("generated %s offers",e),t(s))}var o=this,s=[];i("generating %s offers",e);for(var c=0;e>c;++c)n();r()}},{"../common":17,"./tracker":15,debug:64,hat:70,inherits:72,"simple-peer":123,"simple-websocket":20,xtend:145}],17:[function(e,t,n){(function(t){var r=e("xtend/mutable");n.DEFAULT_ANNOUNCE_PEERS=50,n.MAX_ANNOUNCE_PEERS=82,n.binaryToHex=function(e){return new t(e,"binary").toString("hex")},n.hexToBinary=function(e){return new t(e,"hex").toString("binary")};var o=e("./common-node");r(n,o)}).call(this,e("buffer").Buffer)},{"./common-node":22,buffer:23,"xtend/mutable":146}],18:[function(e,t,n){function r(e,t){function n(){for(var t=new Array(arguments.length),n=0;n<t.length;n++)t[n]=arguments[n];var r=e.apply(this,t),o=t[t.length-1];return"function"==typeof r&&r!==o&&Object.keys(o).forEach(function(e){r[e]=o[e]}),r}if(e&&t)return r(e)(t);if("function"!=typeof e)throw new TypeError("need wrapper function");return Object.keys(e).forEach(function(t){n[t]=e[t]}),n}t.exports=r},{}],19:[function(e,t,n){function r(e){var t=function(){return t.called?t.value:(t.called=!0,t.value=e.apply(this,arguments))};return t.called=!1,t}var o=e("wrappy");t.exports=o(r),r.proto=r(function(){Object.defineProperty(Function.prototype,"once",{value:function(){return r(this)},configurable:!0})})},{wrappy:18}],20:[function(e,t,n){(function(n,r){function o(e,t){var r=this;if(!(r instanceof o))return new o(e,t);t||(t={}),i("new websocket: %s %o",e,t),t.allowHalfOpen=!1,null==t.highWaterMark&&(t.highWaterMark=1048576),a.Duplex.call(r,t),r.url=e,r.connected=!1,r.destroyed=!1,r._maxBufferedAmount=t.highWaterMark,r._chunk=null,r._cb=null,r._interval=null;try{r._ws=new u(r.url)}catch(s){return void n.nextTick(function(){r._onError(s)})}r._ws.binaryType="arraybuffer",r._ws.onopen=function(){r._onOpen()},r._ws.onmessage=function(e){r._onMessage(e)},r._ws.onclose=function(){r._onClose()},r._ws.onerror=function(){r._onError(new Error("connection error to "+r.url))},r.on("finish",function(){r.connected?setTimeout(function(){r._destroy()},100):r.once("connect",function(){setTimeout(function(){r._destroy()},100)})})}t.exports=o;var i=e("debug")("simple-websocket"),s=e("inherits"),a=e("readable-stream"),c=e("ws"),u="undefined"!=typeof window?window.WebSocket:c;s(o,a.Duplex),o.WEBSOCKET_SUPPORT=!!u,o.prototype.send=function(e){var t=this,n=e.length||e.byteLength||e.size;t._ws.send(e),i("write: %d bytes",n)},o.prototype.destroy=function(e){var t=this;t._destroy(null,e)},o.prototype._destroy=function(e,t){var n=this;if(!n.destroyed){if(t&&n.once("close",t),i("destroy (error: %s)",e&&e.message),this.readable=this.writable=!1,n._readableState.ended||n.push(null),n._writableState.finished||n.end(),n.connected=!1,n.destroyed=!0,clearInterval(n._interval),n._interval=null,n._chunk=null,n._cb=null,n._ws){var r=n._ws,o=function(){r.onclose=null,n.emit("close")};if(r.readyState===u.CLOSED)o();else try{r.onclose=o,r.close()}catch(e){o()}r.onopen=null,r.onmessage=null,r.onerror=null}n._ws=null,e&&n.emit("error",e)}},o.prototype._read=function(){},o.prototype._write=function(e,t,n){var r=this;if(r.destroyed)return n(new Error("cannot write after socket is destroyed"));if(r.connected){try{r.send(e)}catch(o){return r._onError(o)}"function"!=typeof c&&r._ws.bufferedAmount>r._maxBufferedAmount?(i("start backpressure: bufferedAmount %d",r._ws.bufferedAmount),r._cb=n):n(null)}else i("write before connect"),r._chunk=e,r._cb=n},o.prototype._onMessage=function(e){var t=this;if(!t.destroyed){var n=e.data;i("read: %d bytes",n.byteLength||n.length),n instanceof ArrayBuffer&&(n=new r(n)),t.push(n)}},o.prototype._onOpen=function(){var e=this;if(!e.connected&&!e.destroyed){if(e.connected=!0,e._chunk){try{e.send(e._chunk)}catch(t){return e._onError(t)}e._chunk=null,i('sent chunk from "write before connect"');var n=e._cb;e._cb=null,n(null)}"function"!=typeof c&&(e._interval=setInterval(function(){if(e._cb&&e._ws&&!(e._ws.bufferedAmount>e._maxBufferedAmount)){i("ending backpressure: bufferedAmount %d",e._ws.bufferedAmount);var t=e._cb;e._cb=null,t(null)}},150),e._interval.unref&&e._interval.unref()),i("connect"),e.emit("connect");
+}},o.prototype._onClose=function(){var e=this;e.destroyed||(i("on close"),e._destroy())},o.prototype._onError=function(e){var t=this;t.destroyed||(i("error: %s",e.message||e),t._destroy(e))}}).call(this,e("_process"),e("buffer").Buffer)},{_process:31,buffer:23,debug:64,inherits:72,"readable-stream":99,ws:22}],21:[function(e,t,n){},{}],22:[function(e,t,n){arguments[4][21][0].apply(n,arguments)},{dup:21}],23:[function(e,t,n){(function(t){"use strict";function r(){try{var e=new Uint8Array(1);return e.foo=function(){return 42},42===e.foo()&&"function"==typeof e.subarray&&0===e.subarray(1,1).byteLength}catch(t){return!1}}function o(){return s.TYPED_ARRAY_SUPPORT?2147483647:1073741823}function i(e,t){if(o()<t)throw new RangeError("Invalid typed array length");return s.TYPED_ARRAY_SUPPORT?(e=new Uint8Array(t),e.__proto__=s.prototype):(null===e&&(e=new s(t)),e.length=t),e}function s(e,t,n){if(!(s.TYPED_ARRAY_SUPPORT||this instanceof s))return new s(e,t,n);if("number"==typeof 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t)n._type=t,"open"===n._mediaSource.readyState?n._createSourceBuffer():n._mediaSource.addEventListener("sourceopen",n._openHandler);else if(null===t._sourceBuffer)t.destroy(),n._type=t._type,n._mediaSource.addEventListener("sourceopen",n._openHandler);else{if(!t._sourceBuffer)throw new Error("The argument to MediaElementWrapper.createWriteStream must be a string or a previous stream returned from that function");t.destroy(),n._type=t._type,n._sourceBuffer=t._sourceBuffer,n._sourceBuffer.addEventListener("updateend",n._flowHandler)}n._elem.addEventListener("timeupdate",n._flowHandler),n.on("error",function(e){n._wrapper.error(e)}),n.on("finish",function(){if(!n.destroyed&&(n._finished=!0,n._allStreams.every(function(e){return e._finished})))try{n._mediaSource.endOfStream()}catch(e){}})}t.exports=r;var i=e("inherits"),s=e("readable-stream"),a=e("to-arraybuffer"),c="undefined"!=typeof window&&window.MediaSource,u=60;r.prototype.createWriteStream=function(e){var t=this;return new o(t,e)},r.prototype.error=function(e){var t=this;t.detailedError||(t.detailedError=e);try{t._mediaSource.endOfStream("decode")}catch(e){}},i(o,s.Writable),o.prototype._onSourceOpen=function(){var e=this;e.destroyed||(e._mediaSource.removeEventListener("sourceopen",e._openHandler),e._createSourceBuffer())},o.prototype.destroy=function(e){var t=this;t.destroyed||(t.destroyed=!0,t._allStreams.splice(t._allStreams.indexOf(t),1),t._mediaSource.removeEventListener("sourceopen",t._openHandler),t._elem.removeEventListener("timeupdate",t._flowHandler),t._sourceBuffer&&(t._sourceBuffer.removeEventListener("updateend",t._flowHandler),"open"===t._mediaSource.readyState&&t._sourceBuffer.abort()),e&&t.emit("error",e),t.emit("close"))},o.prototype._createSourceBuffer=function(){var e=this;if(!e.destroyed)if(c.isTypeSupported(e._type)){if(e._sourceBuffer=e._mediaSource.addSourceBuffer(e._type),e._sourceBuffer.addEventListener("updateend",e._flowHandler),e._cb){var t=e._cb;e._cb=null,t()}}else 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0>a&&(a=0),a}},{inherits:72,"readable-stream":99,"to-arraybuffer":104}],104:[function(e,t,n){arguments[4][41][0].apply(n,arguments)},{buffer:23,dup:41}],105:[function(e,t,n){(function(n){function r(e){var t=this;a.call(t),t._tracks=[],t._fragmentSequence=1,t._file=e,t._decoder=null,t._findMoov(0)}function o(e,t){var n=this;n._entries=e,n._countName=t||"count",n._index=0,n._offset=0,n.value=n._entries[0]}function i(){return{version:0,flags:0,entries:[]}}var s=e("binary-search"),a=e("events").EventEmitter,c=e("inherits"),u=e("mp4-stream"),f=e("mp4-box-encoding"),d=e("range-slice-stream");t.exports=r,c(r,a),r.prototype._findMoov=function(e){var t=this;t._decoder&&t._decoder.destroy(),t._decoder=u.decode();var n=t._file.createReadStream({start:e});n.pipe(t._decoder),t._decoder.once("box",function(r){"moov"===r.type?t._decoder.decode(function(e){n.destroy();try{t._processMoov(e)}catch(r){r.message="Cannot parse mp4 file: 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x=d.stsc.entries[v],S=d.stsz.entries[m],B=w.value.duration,I=E?E.value.compositionOffset:0,A=!0;if(d.stss&&(A=d.stss.entries[k]===m+1),p.push({size:S,duration:B,dts:b,presentationOffset:I,sync:A,offset:y+d.stco.entries[_]}),m++,m>=d.stsz.entries.length)break;if(g++,y+=S,g>=x.samplesPerChunk){g=0,y=0,_++;var C=d.stsc.entries[v+1];C&&_+1>=C.firstChunk&&v++}b+=B,w.inc(),E&&E.inc(),A&&k++}u.mdia.mdhd.duration=0,u.tkhd.duration=0;var T=x.sampleDescriptionId,L={type:"moov",mvhd:e.mvhd,traks:[{tkhd:u.tkhd,mdia:{mdhd:u.mdia.mdhd,hdlr:u.mdia.hdlr,elng:u.mdia.elng,minf:{vmhd:u.mdia.minf.vmhd,smhd:u.mdia.minf.smhd,dinf:u.mdia.minf.dinf,stbl:{stsd:d.stsd,stts:i(),ctts:i(),stsc:i(),stsz:i(),stco:i(),stss:i()}}}}],mvex:{mehd:{fragmentDuration:e.mvhd.duration},trexs:[{trackId:u.tkhd.trackId,defaultSampleDescriptionIndex:T,defaultSampleDuration:0,defaultSampleSize:0,defaultSampleFlags:0}]}};t._tracks.push({trackId:u.tkhd.trackId,timeScale:u.mdia.mdhd.timeScale,samples:p,currSample:null,currTime:null,moov:L,mime:c})}if(0===t._tracks.length)return void t.emit("error",new Error("no playable tracks"));e.mvhd.duration=0,t._ftyp={type:"ftyp",brand:"iso5",brandVersion:0,compatibleBrands:["iso5"]};var R=f.encode(t._ftyp),U=t._tracks.map(function(e){var t=f.encode(e.moov);return{mime:e.mime,init:n.concat([R,t])}});t.emit("ready",U)},r.prototype.seek=function(e){var t=this;if(!t._tracks)throw new Error("Not ready yet; wait for 'ready' event");t._fileStream&&(t._fileStream.destroy(),t._fileStream=null);var n=-1;if(t._tracks.map(function(r,o){function i(e){s.destroyed||s.box(e.moof,function(n){if(n)return t.emit("error",n);if(!s.destroyed){var a=r.inStream.slice(e.ranges);a.pipe(s.mediaData(e.length,function(e){if(e)return t.emit("error",e);if(!s.destroyed){var n=t._generateFragment(o);return n?void i(n):s.finalize()}}))}})}r.outStream&&r.outStream.destroy(),r.inStream&&(r.inStream.destroy(),r.inStream=null);var s=r.outStream=u.encode(),a=t._generateFragment(o,e);return a?((-1===n||a.ranges[0].start<n)&&(n=a.ranges[0].start),void i(a)):s.finalize()}),n>=0){var r=t._fileStream=t._file.createReadStream({start:n});t._tracks.forEach(function(e){e.inStream=new d(n),r.pipe(e.inStream)})}return t._tracks.map(function(e){return e.outStream})},r.prototype._findSampleBefore=function(e,t){var n=this,r=n._tracks[e],o=Math.floor(r.timeScale*t),i=s(r.samples,o,function(e,t){var n=e.dts+e.presentationOffset;return n-t});for(-1===i?i=0:0>i&&(i=-i-2);!r.samples[i].sync;)i--;return i};var h=1;r.prototype._generateFragment=function(e,t){var n,r=this,o=r._tracks[e];if(n=void 0!==t?r._findSampleBefore(e,t):o.currSample,n>=o.samples.length)return null;for(var i=o.samples[n].dts,s=0,a=[],c=n;c<o.samples.length;c++){var u=o.samples[c];if(u.sync&&u.dts-i>=o.timeScale*h)break;s+=u.size;var f=a.length-1;0>f||a[f].end!==u.offset?a.push({start:u.offset,end:u.offset+u.size}):a[f].end+=u.size}return o.currSample=c,{moof:r._generateMoof(e,n,c),ranges:a,length:s}},r.prototype._generateMoof=function(e,t,n){for(var r=this,o=r._tracks[e],i=[],s=t;n>s;s++){var a=o.samples[s];i.push({sampleDuration:a.duration,sampleSize:a.size,sampleFlags:a.sync?33554432:16842752,sampleCompositionTimeOffset:a.presentationOffset})}var c={type:"moof",mfhd:{sequenceNumber:r._fragmentSequence++},trafs:[{tfhd:{flags:131072,trackId:o.trackId},tfdt:{baseMediaDecodeTime:o.samples[t].dts},trun:{flags:3841,dataOffset:8,entries:i}}]};return c.trafs[0].trun.dataOffset+=f.encodingLength(c),c}}).call(this,e("buffer").Buffer)},{"binary-search":106,buffer:23,events:27,inherits:72,"mp4-box-encoding":109,"mp4-stream":113,"range-slice-stream":115}],106:[function(e,t,n){t.exports=function(e,t,n,r,o){var i,s;if(void 0===r)r=0;else if(r=0|r,0>r||r>=e.length)throw new RangeError("invalid lower bound");if(void 0===o)o=e.length-1;else if(o=0|o,r>o||o>=e.length)throw new RangeError("invalid upper bound");for(;o>=r;)if(i=r+(o-r>>1),s=+n(e[i],t,i,e),0>s)r=i+1;else{if(!(s>0))return i;o=i-1}return~r}},{}],107:[function(e,t,n){(function(t){function r(e,t,n){for(var r=t;n>r;r++)e[r]=0}function o(e,t,n){t.writeUInt32BE(Math.floor((e.getTime()+g)/1e3),n)}function i(e,t,n){t.writeUInt16BE(Math.floor(e)%65536,n),t.writeUInt16BE(Math.floor(256*e*256)%65536,n+2)}function s(e,t,n){t[n]=Math.floor(e)%256,t[n+1]=Math.floor(256*e)%256}function a(e,t,n){e||(e=[0,0,0,0,0,0,0,0,0]);for(var r=0;r<e.length;r++)i(e[r],t,n+4*r)}function c(e,n,r){var o=new t(e,"utf8");o.copy(n,r),n[r+o.length]=0}function u(e){for(var t=new Array(e.length/4),n=0;n<t.length;n++)t[n]=d(e,4*n);return t}function f(e,t){return new Date(1e3*e.readUInt32BE(t)-g)}function d(e,t){return e.readUInt16BE(t)+e.readUInt16BE(t+2)/65536}function h(e,t){return e[t]+e[t+1]/256}function l(e,t,n){var r;for(r=0;n>r&&0!==e[t+r];r++);return e.toString("utf8",t,t+r)}var p=e("./index"),m=e("./descriptor"),g=20828448e5;n.fullBoxes={};var _=["mvhd","tkhd","mdhd","vmhd","smhd","stsd","esds","stsz","stco","stss","stts","ctts","stsc","dref","elst","hdlr","mehd","trex","mfhd","tfhd","tfdt","trun"];_.forEach(function(e){n.fullBoxes[e]=!0}),n.ftyp={},n.ftyp.encode=function(e,r,o){r=r?r.slice(o):new t(n.ftyp.encodingLength(e));var i=e.compatibleBrands||[];r.write(e.brand,0,4,"ascii"),r.writeUInt32BE(e.brandVersion,4);for(var s=0;s<i.length;s++)r.write(i[s],8+4*s,4,"ascii");return n.ftyp.encode.bytes=8+4*i.length,r},n.ftyp.decode=function(e,t){e=e.slice(t);for(var n=e.toString("ascii",0,4),r=e.readUInt32BE(4),o=[],i=8;i<e.length;i+=4)o.push(e.toString("ascii",i,i+4));return{brand:n,brandVersion:r,compatibleBrands:o}},n.ftyp.encodingLength=function(e){return 8+4*(e.compatibleBrands||[]).length},n.mvhd={},n.mvhd.encode=function(e,c,u){return c=c?c.slice(u):new t(96),o(e.ctime||new Date,c,0),o(e.mtime||new Date,c,4),c.writeUInt32BE(e.timeScale||0,8),c.writeUInt32BE(e.duration||0,12),i(e.preferredRate||0,c,16),s(e.preferredVolume||0,c,20),r(c,22,32),a(e.matrix,c,32),c.writeUInt32BE(e.previewTime||0,68),c.writeUInt32BE(e.previewDuration||0,72),c.writeUInt32BE(e.posterTime||0,76),c.writeUInt32BE(e.selectionTime||0,80),c.writeUInt32BE(e.selectionDuration||0,84),c.writeUInt32BE(e.currentTime||0,88),c.writeUInt32BE(e.nextTrackId||0,92),n.mvhd.encode.bytes=96,c},n.mvhd.decode=function(e,t){return e=e.slice(t),{ctime:f(e,0),mtime:f(e,4),timeScale:e.readUInt32BE(8),duration:e.readUInt32BE(12),preferredRate:d(e,16),preferredVolume:h(e,20),matrix:u(e.slice(32,68)),previewTime:e.readUInt32BE(68),previewDuration:e.readUInt32BE(72),posterTime:e.readUInt32BE(76),selectionTime:e.readUInt32BE(80),selectionDuration:e.readUInt32BE(84),currentTime:e.readUInt32BE(88),nextTrackId:e.readUInt32BE(92)}},n.mvhd.encodingLength=function(e){return 96},n.tkhd={},n.tkhd.encode=function(e,i,s){return i=i?i.slice(s):new t(80),o(e.ctime||new Date,i,0),o(e.mtime||new Date,i,4),i.writeUInt32BE(e.trackId||0,8),r(i,12,16),i.writeUInt32BE(e.duration||0,16),r(i,20,28),i.writeUInt16BE(e.layer||0,28),i.writeUInt16BE(e.alternateGroup||0,30),i.writeUInt16BE(e.volume||0,32),a(e.matrix,i,36),i.writeUInt32BE(e.trackWidth||0,72),i.writeUInt32BE(e.trackHeight||0,76),n.tkhd.encode.bytes=80,i},n.tkhd.decode=function(e,t){return e=e.slice(t),{ctime:f(e,0),mtime:f(e,4),trackId:e.readUInt32BE(8),duration:e.readUInt32BE(16),layer:e.readUInt16BE(28),alternateGroup:e.readUInt16BE(30),volume:e.readUInt16BE(32),matrix:u(e.slice(36,72)),trackWidth:e.readUInt32BE(72),trackHeight:e.readUInt32BE(76)}},n.tkhd.encodingLength=function(e){return 80},n.mdhd={},n.mdhd.encode=function(e,r,i){return r=r?r.slice(i):new t(20),o(e.ctime||new Date,r,0),o(e.mtime||new Date,r,4),r.writeUInt32BE(e.timeScale||0,8),r.writeUInt32BE(e.duration||0,12),r.writeUInt16BE(e.language||0,16),r.writeUInt16BE(e.quality||0,18),n.mdhd.encode.bytes=20,r},n.mdhd.decode=function(e,t){return e=e.slice(t),{ctime:f(e,0),mtime:f(e,4),timeScale:e.readUInt32BE(8),duration:e.readUInt32BE(12),language:e.readUInt16BE(16),quality:e.readUInt16BE(18)}},n.mdhd.encodingLength=function(e){return 20},n.vmhd={},n.vmhd.encode=function(e,r,o){r=r?r.slice(o):new t(8),r.writeUInt16BE(e.graphicsMode||0,0);var i=e.opcolor||[0,0,0];return r.writeUInt16BE(i[0],2),r.writeUInt16BE(i[1],4),r.writeUInt16BE(i[2],6),n.vmhd.encode.bytes=8,r},n.vmhd.decode=function(e,t){return e=e.slice(t),{graphicsMode:e.readUInt16BE(0),opcolor:[e.readUInt16BE(2),e.readUInt16BE(4),e.readUInt16BE(6)]}},n.vmhd.encodingLength=function(e){return 8},n.smhd={},n.smhd.encode=function(e,o,i){return o=o?o.slice(i):new t(4),o.writeUInt16BE(e.balance||0,0),r(o,2,4),n.smhd.encode.bytes=4,o},n.smhd.decode=function(e,t){return e=e.slice(t),{balance:e.readUInt16BE(0)}},n.smhd.encodingLength=function(e){return 4},n.stsd={},n.stsd.encode=function(e,r,o){r=r?r.slice(o):new t(n.stsd.encodingLength(e));var i=e.entries||[];r.writeUInt32BE(i.length,0);for(var s=4,a=0;a<i.length;a++){var c=i[a];p.encode(c,r,s),s+=p.encode.bytes}return n.stsd.encode.bytes=s,r},n.stsd.decode=function(e,t,n){e=e.slice(t);for(var r=e.readUInt32BE(0),o=new Array(r),i=4,s=0;r>s;s++){var a=p.decode(e,i,n);o[s]=a,i+=a.length}return{entries:o}},n.stsd.encodingLength=function(e){var t=4;if(!e.entries)return t;for(var n=0;n<e.entries.length;n++)t+=p.encodingLength(e.entries[n]);return t},
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t,n;try{var o=e.toString(),i=o.indexOf("ee")+2;t=r.decode(o.substring(0,i)),n=e.slice(i)}catch(s){return}switch(t.msg_type){case 0:this._onRequest(t.piece);break;case 1:this._onData(t.piece,n,t.total_size);break;case 2:this._onReject(t.piece)}},t.prototype.fetch=function(){this._metadataComplete||(this._fetching=!0,this._metadataSize&&this._requestPieces())},t.prototype.cancel=function(){this._fetching=!1},t.prototype.setMetadata=function(e){if(this._metadataComplete)return!0;i("set metadata");try{var t=r.decode(e).info;t&&(e=r.encode(t))}catch(n){}return this._infoHash&&this._infoHash!==c.sync(e)?!1:(this.cancel(),this.metadata=e,this._metadataComplete=!0,this._metadataSize=this.metadata.length,this._wire.extendedHandshake.metadata_size=this._metadataSize,this.emit("metadata",r.encode({info:r.decode(this.metadata)})),!0)},t.prototype._send=function(e,t){var o=r.encode(e);n.isBuffer(t)&&(o=n.concat([o,t])),this._wire.extended("ut_metadata",o)},t.prototype._request=function(e){this._send({msg_type:0,piece:e})},t.prototype._data=function(e,t,n){var r={msg_type:1,piece:e};"number"==typeof n&&(r.total_size=n),this._send(r,t)},t.prototype._reject=function(e){this._send({msg_type:2,piece:e})},t.prototype._onRequest=function(e){if(!this._metadataComplete)return void this._reject(e);var t=e*d,n=t+d;n>this._metadataSize&&(n=this._metadataSize);var r=this.metadata.slice(t,n);this._data(e,r,this._metadataSize)},t.prototype._onData=function(e,t,n){t.length>d||(t.copy(this.metadata,e*d),this._bitfield.set(e),this._checkDone())},t.prototype._onReject=function(e){this._remainingRejects>0&&this._fetching?(this._request(e),this._remainingRejects-=1):this.emit("warning",new Error('Peer sent "reject" too much'))},t.prototype._requestPieces=function(){this.metadata=new n(this._metadataSize);for(var e=0;e<this._numPieces;e++)this._request(e)},t.prototype._checkDone=function(){for(var e=!0,t=0;t<this._numPieces;t++)if(!this._bitfield.get(t)){e=!1;break}if(e){var n=this.setMetadata(this.metadata);n||this._failedMetadata()}},t.prototype._failedMetadata=function(){this._bitfield=new o(0,{grow:f}),this._remainingRejects-=this._numPieces,this._remainingRejects>0?this._requestPieces():this.emit("warning",new Error("Peer sent invalid metadata"))},t}}).call(this,e("buffer").Buffer)},{bencode:141,bitfield:8,buffer:23,debug:64,events:27,inherits:72,"simple-sha1":127}],141:[function(e,t,n){arguments[4][10][0].apply(n,arguments)},{"./lib/decode":142,"./lib/encode":144,dup:10}],142:[function(e,t,n){arguments[4][11][0].apply(n,arguments)},{"./dict":143,buffer:23,dup:11}],143:[function(e,t,n){arguments[4][12][0].apply(n,arguments)},{dup:12}],144:[function(e,t,n){arguments[4][13][0].apply(n,arguments)},{buffer:23,dup:13}],145:[function(e,t,n){function r(){for(var e={},t=0;t<arguments.length;t++){var n=arguments[t];for(var r in n)o.call(n,r)&&(e[r]=n[r])}return e}t.exports=r;var o=Object.prototype.hasOwnProperty},{}],146:[function(e,t,n){function r(e){for(var t=1;t<arguments.length;t++){var n=arguments[t];for(var r in n)o.call(n,r)&&(e[r]=n[r])}return e}t.exports=r;var o=Object.prototype.hasOwnProperty},{}],147:[function(e,t,n){t.exports=function r(e,t,n){return void 0===t?function(t,n){return r(e,t,n)}:(void 0===n&&(n="0"),e-=t.toString().length,e>0?new Array(e+(/\./.test(t)?2:1)).join(n)+t:t+"")}},{}],148:[function(e,t,n){t.exports={version:"0.92.0"}},{}],149:[function(e,t,n){(function(n,r,o){function i(e){function t(){s.destroyed||(s.ready=!0,s.emit("ready"))}var s=this;return s instanceof i?(d.call(s),e||(e={}),s.peerId="string"==typeof e.peerId?e.peerId:(e.peerId||new o(B+l(48))).toString("hex"),s.peerIdBuffer=new o(s.peerId,"hex"),s.nodeId="string"==typeof e.nodeId?e.nodeId:e.nodeId&&e.nodeId.toString("hex")||l(160),s.nodeIdBuffer=new o(s.nodeId,"hex"),s.destroyed=!1,s.listening=!1,s.torrentPort=e.torrentPort||0,s.dhtPort=e.dhtPort||0,s.tracker=void 0!==e.tracker?e.tracker:!0,s.torrents=[],s.maxConns=Number(e.maxConns)||55,s._rtcConfig=e.rtcConfig,s._wrtc=e.wrtc||r.WRTC,"function"==typeof E?s._tcpPool=new E(s):n.nextTick(function(){s._onListening()}),s._downloadSpeed=b(),s._uploadSpeed=b(),e.dht!==!1&&"function"==typeof f?(s.dht=new f(h({nodeId:s.nodeId},e.dht)),s.dht.once("error",function(e){s._destroy(e)}),s.dht.once("listening",function(){var e=s.dht.address();e&&(s.dhtPort=e.port)}),s.dht.setMaxListeners(0),s.dht.listen(s.dhtPort)):s.dht=!1,u("new webtorrent (peerId %s, nodeId %s)",s.peerId,s.nodeId),void("function"==typeof m?m(e.blocklist,{headers:{"user-agent":"WebTorrent/"+x+" (http://webtorrent.io)"}},function(e,n){return e?s.error("Failed to load blocklist: "+e.message):(s.blocked=n,void t())}):n.nextTick(t))):new i(e)}function s(e){return"object"==typeof e&&null!=e&&"function"==typeof e.pipe}t.exports=i;var a=e("simple-concat"),c=e("create-torrent"),u=e("debug")("webtorrent"),f=e("bittorrent-dht/client"),d=e("events").EventEmitter,h=e("xtend"),l=e("hat"),p=e("inherits"),m=e("load-ip-set"),g=e("run-parallel"),_=e("parse-torrent"),y=e("path"),v=e("simple-peer"),b=e("speedometer"),w=e("zero-fill"),E=e("./lib/tcp-pool"),k=e("./lib/torrent"),x=e("./package.json").version,S=x.match(/([0-9]+)/g).slice(0,2).map(w(2)).join(""),B="-WW"+S+"-";p(i,d),i.WEBRTC_SUPPORT=v.WEBRTC_SUPPORT,Object.defineProperty(i.prototype,"downloadSpeed",{get:function(){return this._downloadSpeed()}}),Object.defineProperty(i.prototype,"uploadSpeed",{get:function(){return this._uploadSpeed()}}),Object.defineProperty(i.prototype,"progress",{get:function(){var e=this.torrents.filter(function(e){return 1!==e.progress}),t=e.reduce(function(e,t){return e+t.downloaded},0),n=e.reduce(function(e,t){return e+(t.length||0)},0)||1;return t/n}}),Object.defineProperty(i.prototype,"ratio",{get:function(){var e=this.torrents.reduce(function(e,t){return e+t.uploaded},0),t=this.torrents.reduce(function(e,t){return e+t.received},0)||1;return e/t}}),i.prototype.get=function(e){var t,n,r=this,o=r.torrents.length;if(e instanceof k){for(t=0;o>t;t++)if(n=r.torrents[t],n===e)return n}else{var i;try{i=_(e)}catch(s){}if(!i)return null;if(!i.infoHash)throw new Error("Invalid torrent identifier");for(t=0;o>t;t++)if(n=r.torrents[t],n.infoHash===i.infoHash)return n}return null},i.prototype.download=function(e,t,n){return console.warn("WebTorrent: client.download() is deprecated. Use client.add() instead"),this.add(e,t,n)},i.prototype.add=function(e,t,n){function r(){if(!s.destroyed)for(var e=0,t=s.torrents.length;t>e;e++){var n=s.torrents[e];if(n.infoHash===a.infoHash&&n!==a)return void a._destroy(new Error("Cannot add duplicate torrent "+a.infoHash))}}function o(){s.destroyed||("function"==typeof n&&n(a),s.emit("torrent",a))}function i(){a.removeListener("infoHash",r),a.removeListener("ready",o),a.removeListener("close",i)}var s=this;if(s.destroyed)throw new Error("client is destroyed");if("function"==typeof t)return s.add(e,null,t);u("add"),t=t?h(t):{};var a=new k(e,s,t);return s.torrents.push(a),a.once("infoHash",r),a.once("ready",o),a.once("close",i),a},i.prototype.seed=function(e,t,n){function r(e){var t=[function(t){e.load(f,t)}];i.dht&&t.push(function(t){e.once("dhtAnnounce",t)}),g(t,function(t){return i.destroyed?void 0:t?e._destroy(t):void o(e)})}function o(e){u("on seed"),"function"==typeof n&&n(e),i.emit("seed",e)}var i=this;if(i.destroyed)throw new Error("client is destroyed");if("function"==typeof t)return i.seed(e,null,t);u("seed"),t=t?h(t):{},"string"==typeof e&&(t.path=y.dirname(e)),t.createdBy||(t.createdBy="WebTorrent/"+S),i.tracker||(t.announce=[]);var f,d=i.add(null,t,r);return Array.isArray(e)||(e=[e]),g(e.map(function(e){return function(t){s(e)?a(e,t):t(null,e)}}),function(e,n){return i.destroyed?void 0:e?d._destroy(e):void c.parseInput(n,t,function(e,r){if(!i.destroyed){if(e)return d._destroy(e);f=r.map(function(e){return e.getStream}),c(n,t,function(e,t){if(!i.destroyed){if(e)return d._destroy(e);var n=i.get(t);n?d._destroy(new Error("Cannot add duplicate torrent "+n.infoHash)):d._onTorrentId(t)}})}})}),d},i.prototype.remove=function(e,t){u("remove");var n=this.get(e);if(!n)throw new Error("No torrent with id "+e);this._remove(e,t)},i.prototype._remove=function(e,t){var n=this.get(e);n&&(this.torrents.splice(this.torrents.indexOf(n),1),n.destroy(t))},i.prototype.address=function(){return this.listening?this._tcpPool?this._tcpPool.server.address():{address:"0.0.0.0",family:"IPv4",port:0}:null},i.prototype.destroy=function(e){if(this.destroyed)throw new Error("client already destroyed");this._destroy(null,e)},i.prototype._destroy=function(e,t){var n=this;u("client destroy"),n.destroyed=!0;var r=n.torrents.map(function(e){return function(t){e.destroy(t)}});n._tcpPool&&r.push(function(e){n._tcpPool.destroy(e)}),n.dht&&r.push(function(e){n.dht.destroy(e)}),g(r,t),e&&n.emit("error",e),n.torrents=[],n._tcpPool=null,n.dht=null},i.prototype._onListening=function(){if(this.listening=!0,this._tcpPool){var e=this._tcpPool.server.address();e&&(this.torrentPort=e.port)}this.emit("listening")}}).call(this,e("_process"),"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{},e("buffer").Buffer)},{"./lib/tcp-pool":22,"./lib/torrent":5,"./package.json":148,_process:31,"bittorrent-dht/client":22,buffer:23,"create-torrent":47,debug:64,events:27,hat:70,inherits:72,"load-ip-set":22,"parse-torrent":75,path:30,"run-parallel":118,"simple-concat":119,"simple-peer":123,speedometer:129,xtend:145,"zero-fill":147}]},{},[149])(149)});
diff --git a/options.html b/options.html
index afe49c5..3ce1711 100644
--- a/options.html
+++ b/options.html
@@ -60,6 +60,8 @@
       <label for="t-5" class="tabs selectable_theme theme_nin">Appearance</label>
       <input id="t-6" name="option_tab" type="radio" class="selectable_theme theme_nin" />
       <label for="t-6" class="tabs selectable_theme theme_nin">Users</label>
+      <input id="t-7" name="option_tab" type="radio" class="selectable_theme theme_nin" />
+      <label for="t-7" class="tabs selectable_theme theme_nin">WebTorrent</label>
 
       <div class="tab-content">
 
@@ -450,6 +452,32 @@
           </div>
         </div>
 
+        <div class="webtorrent">
+          <div class="module">
+            <p class="label label-h"> WebTorrent </p>
+            <div class="container">
+              <form>
+                <p class="label">WebTorrent support to display shortened URL media</p>
+                <select id="WebTorrent" class="container">
+                  <option value="enable">Enable</option>
+                  <option value="disable">Disable</option>
+                </select>
+              </form>
+            </div>
+            <div id="WebTorrentCont" class="container">
+              <form>
+                <p class="label">WebTorrent default trackers to use (announce list)</p>
+                <input type="text" id="WebTorrentTrackers" size="80" class="container"/>
+                <p class="label">Auto start download from users we follow</p>
+                <select id="WebTorrentAutoDownload" class="container">
+                  <option value="enable">Enable</option>
+                  <option value="disable">Disable</option>
+                </select>
+              </form>
+            </div>
+          </div>
+        </div>
+
       </div><!-- /tab-content -->
     </div><!-- /options -->
   </div><!-- /options -->
diff --git a/theme_nin/css/style.css b/theme_nin/css/style.css
index 035d3c0..fbea4da 100644
--- a/theme_nin/css/style.css
+++ b/theme_nin/css/style.css
@@ -1480,7 +1480,7 @@ button:disabled:hover, button.disabled:hover, .mini-profile-actions span.disable
   visibility: hidden;
 }
 /* line 42, ../sass/_tabs.sass */
-.options input#tab_language:checked ~ .tab-content .language, .options input#t-2:checked ~ .tab-content .theme, .options input#t-3:checked ~ .tab-content .notifications, .options input#t-4:checked ~ .tab-content .keys, .options input#t-5:checked ~ .tab-content .appearance, .options input#t-6:checked ~ .tab-content .users {
+.options input#tab_language:checked ~ .tab-content .language, .options input#t-2:checked ~ .tab-content .theme, .options input#t-3:checked ~ .tab-content .notifications, .options input#t-4:checked ~ .tab-content .keys, .options input#t-5:checked ~ .tab-content .appearance, .options input#t-6:checked ~ .tab-content .users, .options input#t-7:checked ~ .tab-content .webtorrent {
   position: relative;
   z-index: 10;
   opacity: 1;
diff --git a/theme_nin/js/theme_option.js b/theme_nin/js/theme_option.js
index 56f686f..fdcb3a5 100644
--- a/theme_nin/js/theme_option.js
+++ b/theme_nin/js/theme_option.js
@@ -59,5 +59,6 @@ function localizeLabels() {
     $("label[for=t-4]").text(polyglot.t("Keys"));
     $("label[for=t-5]").text(polyglot.t("Appearance"));
     $("label[for=t-6]").text(polyglot.t("Users"));
+    $("label[for=t-7]").text(polyglot.t("WebTorrent"));
 }
 
diff --git a/theme_nin/sass/_tabs.sass b/theme_nin/sass/_tabs.sass
index 6d3e306..c403c22 100644
--- a/theme_nin/sass/_tabs.sass
+++ b/theme_nin/sass/_tabs.sass
@@ -47,6 +47,7 @@
     &#t-4:checked ~ .tab-content .keys,
     &#t-5:checked ~ .tab-content .appearance,
     &#t-6:checked ~ .tab-content .users
+    &#t-7:checked ~ .tab-content .webtorrent
       position: relative
       z-index: 10
       opacity: 1

From d6da99863579bb1812b71e73713dfd023d103d11 Mon Sep 17 00:00:00 2001
From: Miguel Freitas <miguelfreitas@users.noreply.github.com>
Date: Sun, 8 May 2016 16:31:54 -0300
Subject: [PATCH 2/3] guess media type by filename extension when mimetype is
 missing

---
 js/interface_common.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/js/interface_common.js b/js/interface_common.js
index d6dfe32..1039600 100644
--- a/js/interface_common.js
+++ b/js/interface_common.js
@@ -978,6 +978,11 @@ function startTorrentDownloadAndPreview(torrentId, previewContainer, isMedia) {
 }
 
 function webtorrentFilePreview(file, previewContainer, isMedia) {
+    if (!isMedia) {
+        // try guessing by filename extension
+        isMedia = /^[^?]+\.(?:jpe?g|gif|png|mp4|webm|mp3|ogg|wav|)$/i.test(file.name)
+    }
+    
     if (isMedia) {
         var imagePreview = $('<div class="image-preview" />');
         previewContainer.append(imagePreview);

From ca911842c1739e5f29eb50086a9904b113ecebc7 Mon Sep 17 00:00:00 2001
From: Miguel Freitas <miguelfreitas@users.noreply.github.com>
Date: Sun, 8 May 2016 23:28:32 -0300
Subject: [PATCH 3/3] experimental attachment support using webtorrent. persist
 attached file (local added torrents) using indexedDB/localForage lib.

---
 home.html              |  3 ++
 js/interface_common.js | 12 ++++---
 js/interface_home.js   | 80 +++++++++++++++++++++++++++++++++++++-----
 js/localforage.min.js  |  7 ++++
 4 files changed, 90 insertions(+), 12 deletions(-)
 create mode 100644 js/localforage.min.js

diff --git a/home.html b/home.html
index cc36a8d..dd21bfd 100644
--- a/home.html
+++ b/home.html
@@ -126,6 +126,9 @@
           <form class="post-area-new">
             <textarea placeholder="New Post..."></textarea>
             <div class="post-area-extras">
+              <div class="post-area-attach" style="display: none;">
+                <input type="file" id="fileInputAttach" style="font-size: 10px;/>
+              </div>
               <span class="post-area-remaining">140</span>
               <button class="undo-unicode disabled" disabled="disabled">undo</button>
               <button class="post-submit disabled" disabled="disabled">post</button>
diff --git a/js/interface_common.js b/js/interface_common.js
index 1039600..9febd0d 100644
--- a/js/interface_common.js
+++ b/js/interface_common.js
@@ -930,8 +930,10 @@ function applyShortenedURI(short, uriAndMimetype) {
             if ($.Options.WebTorrent.val === 'enable') {
                 if ($.Options.WebTorrentAutoDownload.val === 'enable' &&
                     followingUsers.indexOf(fromUser) !==-1) {
-                    twister.torrentIds[long] = true;
-                    $.localStorage.set('torrentIds', twister.torrentIds);
+                    if(!(long in twister.torrentIds)) {
+                        twister.torrentIds[long] = true;
+                        $.localStorage.set('torrentIds', twister.torrentIds);
+                    }
                     startTorrentDownloadAndPreview(long, previewContainer, isMedia);
                 } else {
                     // webtorrent enabled but no auto-download. provide a link to start manually.
@@ -987,9 +989,11 @@ function webtorrentFilePreview(file, previewContainer, isMedia) {
         var imagePreview = $('<div class="image-preview" />');
         previewContainer.append(imagePreview);
         file.appendTo(imagePreview[0], function (err, elem) {
-            elem.pause();
+            if ('pause' in elem) {
+                elem.pause();
+            }
         });
-        imagePreview.find("video").removeAttr("autoplay").get(0).pause();
+        imagePreview.find("video").removeAttr("autoplay");
     } else {
         file.getBlobURL(function (err, url) {
             if (err) return console.error(err)
diff --git a/js/interface_home.js b/js/interface_home.js
index 6e11d39..4e5c421 100644
--- a/js/interface_home.js
+++ b/js/interface_home.js
@@ -310,7 +310,7 @@ function initWebTorrent() {
     localStorage.removeItem('debug')
 
     WEBTORRENT_ANNOUNCE = $.Options.WebTorrentTrackers.val.split(/[ ,]+/)
-    $.getScript('js/webtorrent.min.js', function( data, textStatus, jqxhr ) {
+    $.getScript('js/webtorrent.min.js', function() {
         WebTorrentClient = new WebTorrent();
         console.log("WebTorrent started")
         WebTorrentClient.on('error', function (err) {
@@ -322,14 +322,78 @@ function initWebTorrent() {
 
         if ($.localStorage.isSet('torrentIds'))
             twister.torrentIds = $.localStorage.get('torrentIds');
-        if ($.Options.WebTorrentAutoDownload.val === 'enable') {
-            for (var torrentId in twister.torrentIds) {
-                if( twister.torrentIds[torrentId] === true ) {
-                    console.log("WebTorrent auto-download: " + torrentId);
-                    WebTorrentClient.add(torrentId);
+
+        $.getScript('js/localforage.min.js', function() {
+            localforage.setDriver([localforage.INDEXEDDB,localforage.WEBSQL]).then(function() {
+                for (var torrentId in twister.torrentIds) {
+                    if( twister.torrentIds[torrentId] ) {
+                        if (typeof(twister.torrentIds[torrentId]) === "string") {
+                            // get blob file to restart seeding this file
+                            var onGetItem = function(torrentId, err, data) {
+                                console.log("onget:", torrentId, err, data)
+                                if (err || data === null) {
+                                    // error reading blob, just add torrentId
+                                    console.log("WebTorrent auto-download: " + torrentId + 
+                                                " (previously seeded as: " + twister.torrentIds[torrentId] + ")" );
+                                    WebTorrentClient.add(torrentId);
+                                } else {
+                                    var fileBlob = new File([data], twister.torrentIds[torrentId]);
+                                    console.log('WebTorrent seeding: "' + twister.torrentIds[torrentId] +
+                                                '" size: ' + data.size);
+                                    WebTorrentClient.seed(fileBlob);
+                                }
+                            }
+                            localforage.getItem(torrentId, onGetItem.bind(null, torrentId));
+                        } else if ($.Options.WebTorrentAutoDownload.val === 'enable') {
+                            console.log("WebTorrent auto-download: " + torrentId);
+                            WebTorrentClient.add(torrentId);
+                        }
+                    }
                 }
-            }
-        }
+
+                // setup attach button
+                $(".post-area-attach").show();
+                var fileInput = $("#fileInputAttach");
+                fileInput.on('change', function(event) {
+                    var file = fileInput[0].files[0];
+                    var seedingTorrent = undefined;
+                    for (var i = 0; i < WebTorrentClient.torrents.length; i++) {
+                        var torrent = WebTorrentClient.torrents[i];
+                        if (torrent.length === file.size &&
+                            torrent.files[0].name === file.name) {
+                            seedingTorrent = torrent;
+                        }
+                    }
+                    var saveBlobFile = function(infoHash,file) {
+                        var magnetLink = "magnet:?xt=urn:btih:" + infoHash
+                        var blobFile = new Blob([file]);
+                        localforage.setItem(magnetLink, blobFile);
+                        twister.torrentIds[magnetLink] = file.name;
+                        $.localStorage.set('torrentIds', twister.torrentIds);
+                        return magnetLink;
+                    }
+                    if (seedingTorrent) {
+                        var magnetLink = saveBlobFile(seedingTorrent.infoHash,file);
+                        console.log('Already seeding ' + magnetLink);
+                        shortenMagnetLink(event,magnetLink);
+                    } else {
+                        WebTorrentClient.seed(file, function (torrent) {
+                            var magnetLink = saveBlobFile(torrent.infoHash,file);
+                            console.log('Client is seeding ' + magnetLink);
+                            shortenMagnetLink(event,magnetLink);
+                        });
+                    }
+                });
+            });
+        });
+    });
+}
+
+function shortenMagnetLink(event,magnetLink) {
+    var uri = prompt(polyglot.t('shorten_URI_enter_link'), magnetLink);
+    var textArea = $(event.target).closest('form').find('textarea');
+    newShortURI(uri, function(long,short) {
+        textArea.append(short);
     });
 }
 
diff --git a/js/localforage.min.js b/js/localforage.min.js
new file mode 100644
index 0000000..ffd0863
--- /dev/null
+++ b/js/localforage.min.js
@@ -0,0 +1,7 @@
+/*!
+    localForage -- Offline Storage, Improved
+    Version 1.4.0
+    https://mozilla.github.io/localForage
+    (c) 2013-2015 Mozilla, Apache License 2.0
+*/
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