Web UI code optimization and clean up

src/tracker/qtracker.cpp

@@ -30,6 +30,7 @@
 
 #include <QHttpRequestHeader>
 #include <QTcpSocket>
+#include <QUrl>
 
 #include <libtorrent/bencode.hpp>
 #include <libtorrent/entry.hpp>
@@ -86,27 +87,36 @@ void QTracker::readRequest()
   QTcpSocket *socket = static_cast<QTcpSocket*>(sender());
   QByteArray input = socket->readAll();
   //qDebug("QTracker: Raw request:\n%s", input.data());
-  HttpRequestParser parser;
-  parser.write(input);
-  if(!parser.isValid()) {
-    qDebug("QTracker: Invalid HTTP Request:\n %s", qPrintable(parser.toString()));
+  QHttpRequestHeader http_request(input);
+  if(!http_request.isValid()) {
+    qDebug("QTracker: Invalid HTTP Request:\n %s", qPrintable(http_request.toString()));
     respondInvalidRequest(socket, 100, "Invalid request type");
     return;
   }
   //qDebug("QTracker received the following request:\n%s", qPrintable(parser.toString()));
   // Request is correct, is it a GET request?
-  if(parser.method() != "GET") {
-    qDebug("QTracker: Unsupported HTTP request: %s", qPrintable(parser.method()));
+  if(http_request.method() != "GET") {
+    qDebug("QTracker: Unsupported HTTP request: %s", qPrintable(http_request.method()));
     respondInvalidRequest(socket, 100, "Invalid request type");
     return;
   }
-  if(!parser.url().startsWith("/announce", Qt::CaseInsensitive)) {
-    qDebug("QTracker: Unrecognized path: %s", qPrintable(parser.url()));
+  if(!http_request.path().startsWith("/announce", Qt::CaseInsensitive)) {
+    qDebug("QTracker: Unrecognized path: %s", qPrintable(http_request.path()));
     respondInvalidRequest(socket, 100, "Invalid request type");
     return;
   }
+
   // OK, this is a GET request
-  respondToAnnounceRequest(socket, parser);
+  // Parse GET parameters
+  QHash<QString, QString> get_parameters;
+  QUrl url = QUrl::fromEncoded(http_request.path().toAscii());
+  QListIterator<QPair<QString, QString> > i(url.queryItems());
+  while (i.hasNext()) {
+    QPair<QString, QString> pair = i.next();
+    get_parameters[pair.first] = pair.second;
+  }
+
+  respondToAnnounceRequest(socket, get_parameters);
 }
 
 void QTracker::respondInvalidRequest(QTcpSocket *socket, int code, QString msg)
@@ -117,18 +127,19 @@ void QTracker::respondInvalidRequest(QTcpSocket *socket, int code, QString msg)
   socket->disconnectFromHost();
 }
 
-void QTracker::respondToAnnounceRequest(QTcpSocket *socket, const HttpRequestParser& parser)
+void QTracker::respondToAnnounceRequest(QTcpSocket *socket,
+                                        const QHash<QString, QString>& get_parameters)
 {
   TrackerAnnounceRequest annonce_req;
   // IP
   annonce_req.peer.ip = socket->peerAddress().toString();
   // 1. Get info_hash
-  if(parser.get("info_hash").isNull()) {
+  if(!get_parameters.contains("info_hash")) {
     qDebug("QTracker: Missing info_hash");
     respondInvalidRequest(socket, 101, "Missing info_hash");
     return;
   }
-  annonce_req.info_hash = parser.get("info_hash");
+  annonce_req.info_hash = get_parameters.value("info_hash");
   // info_hash cannot be longer than 20 bytes
   /*if(annonce_req.info_hash.toAscii().length() > 20) {
     qDebug("QTracker: Info_hash is not 20 byte long: %s (%d)", qPrintable(annonce_req.info_hash), annonce_req.info_hash.toAscii().length());
@@ -136,12 +147,12 @@ void QTracker::respondToAnnounceRequest(QTcpSocket *socket, const HttpRequestPar
     return;
   }*/
   // 2. Get peer ID
-  if(parser.get("peer_id").isNull()) {
+  if(!get_parameters.contains("peer_id")) {
     qDebug("QTracker: Missing peer_id");
     respondInvalidRequest(socket, 102, "Missing peer_id");
     return;
   }
-  annonce_req.peer.peer_id = parser.get("peer_id");
+  annonce_req.peer.peer_id = get_parameters.value("peer_id");
   // peer_id cannot be longer than 20 bytes
   /*if(annonce_req.peer.peer_id.length() > 20) {
     qDebug("QTracker: peer_id is not 20 byte long: %s", qPrintable(annonce_req.peer.peer_id));
@@ -149,13 +160,13 @@ void QTracker::respondToAnnounceRequest(QTcpSocket *socket, const HttpRequestPar
     return;
   }*/
   // 3. Get port
-  if(parser.get("port").isNull()) {
+  if(!get_parameters.contains("port")) {
     qDebug("QTracker: Missing port");
     respondInvalidRequest(socket, 103, "Missing port");
     return;
   }
   bool ok = false;
-  annonce_req.peer.port = parser.get("port").toInt(&ok);
+  annonce_req.peer.port = get_parameters.value("port").toInt(&ok);
   if(!ok || annonce_req.peer.port < 1 || annonce_req.peer.port > 65535) {
     qDebug("QTracker: Invalid port number (%d)", annonce_req.peer.port);
     respondInvalidRequest(socket, 103, "Missing port");
@@ -163,14 +174,14 @@ void QTracker::respondToAnnounceRequest(QTcpSocket *socket, const HttpRequestPar
   }
   // 4.  Get event
   annonce_req.event = "";
-  if(!parser.get("event").isNull()) {
-    annonce_req.event = parser.get("event");
+  if(get_parameters.contains("event")) {
+    annonce_req.event = get_parameters.value("event");
     qDebug("QTracker: event is %s", qPrintable(annonce_req.event));
   }
   // 5. Get numwant
   annonce_req.numwant = 50;
-  if(!parser.get("numwant").isNull()) {
-    int tmp = parser.get("numwant").toInt();
+  if(get_parameters.contains("numwant")) {
+    int tmp = get_parameters.value("numwant").toInt();
     if(tmp > 0) {
       qDebug("QTracker: numwant=%d", tmp);
       annonce_req.numwant = tmp;
@@ -178,7 +189,7 @@ void QTracker::respondToAnnounceRequest(QTcpSocket *socket, const HttpRequestPar
   }
   // 6. no_peer_id (extension)
   annonce_req.no_peer_id = false;
-  if(parser.hasKey("no_peer_id")) {
+  if(get_parameters.contains("no_peer_id")) {
     annonce_req.no_peer_id = true;
   }
   // 7. TODO: support "compact" extension

src/tracker/qtracker.h

@@ -35,7 +35,6 @@
 #include <QHttpResponseHeader>
 #include <QHash>
 
-#include "httprequestparser.h"
 #include "trackerannouncerequest.h"
 #include "qpeer.h"
 
@@ -63,7 +62,7 @@ protected slots:
   void readRequest();
   void handlePeerConnection();
   void respondInvalidRequest(QTcpSocket *socket, int code, QString msg);
-  void respondToAnnounceRequest(QTcpSocket *socket, const HttpRequestParser& parser);
+  void respondToAnnounceRequest(QTcpSocket *socket, const QHash<QString, QString>& get_parameters);
   void ReplyWithPeerList(QTcpSocket *socket, const TrackerAnnounceRequest &annonce_req);
 
 private:

src/webui/httpconnection.cpp

@@ -91,7 +91,7 @@ void HttpConnection::read() {
     m_generator.setStatusLine(400, "Bad Request");
     write();
   } else {
-    if (m_parser.isParsable())
+    if (!m_parser.isError())
       respond();
   }
 }
@@ -129,7 +129,6 @@ void HttpConnection::translateDocument(QString& data) {
           ++context_index;
         } while(translation == word && context_index < 15);
       }
-
       // Remove keyboard shortcuts
       translation.replace(mnemonic, "");
 
@@ -153,7 +152,7 @@ void HttpConnection::respond() {
       write();
       return;
     }
-    QString auth = m_parser.value("Authorization");
+    QString auth = m_parser.header().value("Authorization");
     if(auth.isEmpty()) {
       // Return unauthorized header
       qDebug("Auth is Empty...");
@@ -164,7 +163,7 @@ void HttpConnection::respond() {
     }
     //qDebug("Auth: %s", qPrintable(auth.split(" ").first()));
     if (QString::compare(auth.split(" ").first(), "Digest", Qt::CaseInsensitive) != 0
-        || !m_httpserver->isAuthorized(auth.toLocal8Bit(), m_parser.method())) {
+        || !m_httpserver->isAuthorized(auth.toLocal8Bit(), m_parser.header().method())) {
       // Update failed attempt counter
       m_httpserver->increaseNbFailedAttemptsForIp(peer_ip);
       qDebug("client IP: %s (%d failed attempts)", qPrintable(peer_ip), nb_fail);
@@ -567,19 +566,16 @@ void HttpConnection::respondCommand(const QString& command) {
     return;
   }
   if(command == "recheck"){
-    recheckTorrent(m_parser.post("hash"));
+    QBtSession::instance()->recheckTorrent(m_parser.post("hash"));
     return;
   }
 }
 
-void HttpConnection::recheckTorrent(const QString& hash) {
-  QBtSession::instance()->recheckTorrent(hash);
-}
-
-void HttpConnection::decreaseTorrentsPriority(const QStringList &hashes)
-{
+void HttpConnection::decreaseTorrentsPriority(const QStringList &hashes) {
   qDebug() << Q_FUNC_INFO << hashes;
-  std::priority_queue<QPair<int, QTorrentHandle>, std::vector<QPair<int, QTorrentHandle> >, std::less<QPair<int, QTorrentHandle> > > torrent_queue;
+  std::priority_queue<QPair<int, QTorrentHandle>,
+      std::vector<QPair<int, QTorrentHandle> >,
+      std::less<QPair<int, QTorrentHandle> > > torrent_queue;
   // Sort torrents by priority
   foreach(const QString &hash, hashes) {
     try {
@@ -602,7 +598,9 @@ void HttpConnection::decreaseTorrentsPriority(const QStringList &hashes)
 void HttpConnection::increaseTorrentsPriority(const QStringList &hashes)
 {
   qDebug() << Q_FUNC_INFO << hashes;
-  std::priority_queue<QPair<int, QTorrentHandle>, std::vector<QPair<int, QTorrentHandle> >, std::greater<QPair<int, QTorrentHandle> > > torrent_queue;
+  std::priority_queue<QPair<int, QTorrentHandle>,
+      std::vector<QPair<int, QTorrentHandle> >,
+      std::greater<QPair<int, QTorrentHandle> > > torrent_queue;
   // Sort torrents by priority
   foreach(const QString &hash, hashes) {
     try {

src/webui/httpconnection.h

@@ -65,7 +65,6 @@ protected slots:
   void respondNotFound();
   void processDownloadedFile(const QString& url, const QString& file_path);
   void handleDownloadFailure(const QString& url, const QString& reason);
-  void recheckTorrent(const QString& hash);
   void decreaseTorrentsPriority(const QStringList& hashes);
   void increaseTorrentsPriority(const QStringList& hashes);
 

src/webui/httprequestparser.cpp

@@ -33,8 +33,7 @@
 #include <QUrl>
 #include <QDebug>
 
-HttpRequestParser::HttpRequestParser(): m_headerDone(false),
-  m_messageDone(false), m_error(false)
+HttpRequestParser::HttpRequestParser(): m_error(false)
 {
 }
 
@@ -42,11 +41,6 @@ HttpRequestParser::~HttpRequestParser()
 {
 }
 
-bool HttpRequestParser::isParsable() const {
-  return !m_error && m_headerDone && isValid()
-      && (m_messageDone || !hasContentLength() || contentLength() == 0);
-}
-
 bool HttpRequestParser::isError() const {
   return m_error;
 }
@@ -56,9 +50,7 @@ QString HttpRequestParser::url() const {
 }
 
 QByteArray HttpRequestParser::message() const {
-  if (isParsable())
   return m_data;
-	return QByteArray();
 }
 
 QString HttpRequestParser::get(const QString& key) const {
@@ -73,40 +65,32 @@ QByteArray HttpRequestParser::torrent() const {
   return m_torrentContent;
 }
 
-void HttpRequestParser::write(QByteArray ba) {
+void HttpRequestParser::write(const QByteArray& ba) {
+  int end_of_header = ba.indexOf("\r\n\r\n");
+  if (end_of_header < 0) {
+    qWarning() << "Could not find HTTP header: " << ba.constData();
+    m_error = true;
+    return;
+  }
+
   // Parse header
-  while (!m_headerDone && !ba.isEmpty()) {
-    const int index = ba.indexOf('\n') + 1;
-    if(index == 0) {
-      m_data += ba;
-      ba.clear();
-    } else {
-      m_data += ba.left(index);
-      ba.remove(0, index);
-      if(m_data.right(4) == "\r\n\r\n") {
-        QHttpRequestHeader::operator=(QHttpRequestHeader(m_data));
-        m_headerDone = true;
-        m_data.clear();
-				QUrl url = QUrl::fromEncoded(QHttpRequestHeader::path().toAscii());
+  m_header = QHttpRequestHeader(ba.left(end_of_header));
+  QUrl url = QUrl::fromEncoded(m_header.path().toAscii());
   m_path = url.path();
 
+  // Parse GET parameters
   QListIterator<QPair<QString, QString> > i(url.queryItems());
   while (i.hasNext()) {
     QPair<QString, QString> pair = i.next();
     m_getMap[pair.first] = pair.second;
   }
-			}
-		}
-	}
-  // Parse message
-  if(!m_messageDone && !ba.isEmpty()) {
-    if(hasContentLength()) {
-      m_data += ba;
-      if(m_data.size() >= (int) contentLength()) {
-        m_data.resize(contentLength());
-        m_messageDone = true;
-				//parse POST data
-        if(contentType() == "application/x-www-form-urlencoded") {
+
+  // Parse message content
+  if (m_header.hasContentLength()) {
+    m_data = ba.mid(end_of_header + 4, m_header.contentLength()); // +4 to skip "\r\n\r\n"
+
+    // Parse POST data
+    if(m_header.contentType() == "application/x-www-form-urlencoded") {
       QUrl url;
       url.setEncodedQuery(m_data);
       QListIterator<QPair<QString, QString> > i(url.queryItems());
@@ -114,13 +98,11 @@ void HttpRequestParser::write(QByteArray ba) {
         QPair<QString, QString> pair = i.next();
         m_postMap[pair.first] = pair.second;
       }
-				}
-        if(contentType() == "multipart/form-data") {
+    } else {
+      // Parse form data (torrent file)
+      if(m_header.contentType() == "multipart/form-data") {
         m_torrentContent = m_data.right(m_data.size()-m_data.indexOf("\r\n\r\n")-QByteArray("\r\n\r\n").size());
       }
     }
-    }	else {
-      m_error = true;
-    }
   }
 }

src/webui/httprequestparser.h

@@ -34,23 +34,22 @@
 
 #include<QHttpRequestHeader>
 
-class HttpRequestParser : public QHttpRequestHeader {
+class HttpRequestParser {
 
 public:
   HttpRequestParser();
   ~HttpRequestParser();
-  bool isParsable() const;
   bool isError() const;
   QString url() const;
   QByteArray message() const;
   QString get(const QString& key) const;
   QString post(const QString& key) const;
   QByteArray torrent() const;
-  void write(QByteArray ba);
+  void write(const QByteArray& ba);
+  inline QHttpRequestHeader& header() { return m_header; }
 
 private:
-  bool m_headerDone;
-  bool m_messageDone;
+  QHttpRequestHeader m_header;
   bool m_error;
   QByteArray m_data;
   QString m_path;