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twister-html
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fix of post formatting: turn on `[]()` syntax for link, now with checking for injections

master
Simon Grim 9 years ago
parent
5519d01359
commit
928688bdac
1 changed files with 63 additions and 26 deletions
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  1. 89
      js/twister_formatpost.js

89
js/twister_formatpost.js
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@ -425,33 +425,71 @@ function htmlFormatMsg(msg, mentions) { @@ -425,33 +425,71 @@ function htmlFormatMsg(msg, mentions) {
}
var mentionsChars = 'abcdefghijklmnopqrstuvwxyz_0123456789';
var stopCharsTrailing = '/\\*~_-`.,:;?!%\'"[](){}^|«»…\u201C\u201D\u2026\u2014\u4E00\u3002\uFF0C\uFF1A\uFF1F\uFF01\u3010\u3011';
var stopCharsTrailing = '/\\*~_-`.,:;?!%\'"[](){}^|«»…\u201C\u201D\u2026\u2014\u4E00\u3002\uFF0C\uFF1A\uFF1F\uFF01\u3010\u3011\u2047\u2048\u2049';
var stopCharsTrailingUrl = stopCharsTrailing.slice(1);
var whiteSpaces = ' \f\n\r\t\v​\u00A0\u1680\u180E\u2000​\u2001\u2002​\u2003\u2004\u2005\u2006​\u2007\u2008​\u2009\u200A\u2028\u2029​\u202F\u205F\u3000';
var whiteSpacesUrl = '\'\"' + whiteSpaces;
var stopCharsLeft = '<' + whiteSpaces;
var stopCharsRight = '>' + whiteSpaces;
var stopCharsRightHashtags = '>/\\.,:;?!%\'"[](){}^|«»…\u201C\u201D\u2026\u2014\u4E00\u3002\uFF0C\uFF1A\uFF1F\uFF01\u3010\u3011' // same as stopCharsTrailing but without '*~_-`' plus '>'
var stopCharsRightHashtags = '>/\\.,:;?!%\'"[](){}^|«»…\u201C\u201D\u2026\u2014\u4E00\u3002\uFF0C\uFF1A\uFF1F\uFF01\u3010\u3011\u2047\u2048\u2049' // same as stopCharsTrailing but without '*~_-`' plus '>'
+ whiteSpaces;
var stopCharsMarkDown = '/\\*~_-`.,:;?!%+=&\'"[](){}^|«»…\u201C\u201D\u2026\u2014\u4E00\u3002\uFF0C\uFF1A\uFF1F\uFF01\u3010\u3011';
var stopCharsMarkDown = '/\\*~_-`.,:;?!%+=&\'"[](){}^|«»…\u201C\u201D\u2026\u2014\u4E00\u3002\uFF0C\uFF1A\uFF1F\uFF01\u3010\u3011\u2047\u2048\u2049';
var i, j, k, str, strEncoded;
var html = [];
msg = markdown(escapeHtmlEntities(msg),
'`', 'samp'); // kind of monospace, sequence of chars inside will be escaped from markup
for (i = 0; i < msg.length - 7; i++) {
var htmlPiece = undefined;
var msgSliceIdx;
if (msg.slice(i, i + 2) === '](') {
// FIXME there can be text with [] inside [] or links with () wee need to handle it too
j = getStrStart(msg, i - 1, '[', true, '');
if (j < i) {
k = getStrEnd(msg, i + 2, ')', true, '');
if (k > i + 1) {
var a = $('#external-page-link-template')[0].cloneNode();
a.href = proxyURL(msg.slice(i + 2, k + 1));
a.text = msg.slice(j, i);
htmlPiece = a.outerHTML;
msgSliceIdx = [j - 1, k + 2];
j = getStrStart(msg, i - 2, '[', true, '');
if (j < i - 1) {
k = getStrEnd(msg, i + 3, ')', true, whiteSpaces);
if (k > i + 2) {
strEncoded = msg.slice(j, i); // just temporary storage for name of possiible link
for (i += 2; i < k; i++) {
if (whiteSpacesUrl.indexOf(msg[i]) === -1) // drop whitespaces and ' and " // apostrophes and quotes to prevent injection of js events
break;
}
if (i < k) {
// check for injections like [href=(' or ")]('#' or 'javascript' or 'data')[:] // () and [] here just to explain somehow an idea, it's not about markup syntax
if (msg[i] === '#' || msg.slice(i, i + 10).toLowerCase() === 'javascript'
|| msg.slice(i, i + 4).toLowerCase() === 'data') {
html.push('…<br><b><i>' + polyglot.t('busted_oh') + '</i> '
+ polyglot.t('busted_avowal') + ':</b><br><samp>'
+ msg.slice(i, k + 1)
.replace(/&(?!lt;|gt;)/g, '&amp;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&apos;')
+ '</samp><br>'
);
} else {
if (getStrEnd(msg, i + 1, whiteSpacesUrl, false, '') < k) // use only first word as href target, others drop silently
k = getStrEnd(msg, i + 1, whiteSpacesUrl, false, '');
html.push($('#external-page-link-template')[0].outerHTML
.replace(/\bid\s*=\s*"[^]*?"+/ig, '') // $().removeAttr('id')
//.replace(/\bhref\s*=\s*"[^]*?"+/ig, '') // $().removeAttr('href')
.replace(/<a\s+/ig, '<a href="' + proxyURL(msg.slice(i, k + 1)) + '" ') // $().closest('a').attr('href', proxyURL(url))
.replace(/(<a\s+[^]*?>)[^]*?(<\/a>)/ig, '$1'
+ unpackHtml(
markdown(markdown(markdown(markdown(strEncoded, // name of link, see above
'*', 'b'), // bold
'~', 'i'), // italic
'_', 'u'), // underlined
'-', 's') // striketrough
.replace(/&(?!lt;|gt;)/g, '&amp;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&apos;')
)
+ '$2') // $().closest('a').text(url)
);
}
strEncoded = '>' + (html.length - 1).toString() + '<';
msg = msg.slice(0, j - 1) + strEncoded + msg.slice(getStrEnd(msg, k + 1, ')', true, '') + 2);
i = j + strEncoded.length - 1;
} // else
// i = just no
}
}
} else if (msg.slice(i, i + 4).toLowerCase() === 'http') {
@ -461,34 +499,32 @@ function htmlFormatMsg(msg, mentions) { @@ -461,34 +499,32 @@ function htmlFormatMsg(msg, mentions) {
str = msg.slice(i, j + 1);
// FIXME we're trying to not interact with DOM, coz' we want to run really fast [to hell of RegExps]
// FIXME actually we should avoid it by dropping a template idea and construct html right here
htmlPiece = $('#external-page-link-template')[0].outerHTML
html.push($('#external-page-link-template')[0].outerHTML
.replace(/\bid\s*=\s*"[^]*?"+/ig, '') // $().removeAttr('id')
//.replace(/\bhref\s*=\s*"[^]*?"+/ig, '') // $().removeAttr('href')
.replace(/<a\s+/ig, '<a href="' + proxyURL(str) + '" ') // $().closest('a').attr('href', proxyURL(url))
.replace(/(<a\s+[^]*?>)[^]*?(<\/a>)/ig, '$1' + str + '$2') // $().closest('a').text(url)
;
msgSliceIdx = [i, i + str.length];
);
strEncoded = '>' + (html.length - 1).toString() + '<';
msg = msg.slice(0, i) + strEncoded + msg.slice(i + str.length);
i = i + strEncoded.length - 1;
}
} else if (msg.slice(i + 4, i + 8).toLowerCase() === 's://' && stopCharsRight.indexOf(msg[i + 8]) === -1) {
j = getStrEnd(msg, i + 8, stopCharsRight, false, stopCharsTrailingUrl);
if (j > i + 7) {
str = msg.slice(i, j + 1);
htmlPiece = $('#external-page-link-template')[0].outerHTML
html.push($('#external-page-link-template')[0].outerHTML
.replace(/\bid\s*=\s*"[^]*?"+/ig, '') // $().removeAttr('id')
//.replace(/\bhref\s*=\s*"[^]*?"+/ig, '') // $().removeAttr('href')
.replace(/<a\s+/ig, '<a href="' + proxyURL(str) + '" ') // $().closest('a').attr('href', proxyURL(url))
.replace(/(<a\s+[^]*?>)[^]*?(<\/a>)/ig, '$1' + str + '$2') // $().closest('a').text(url)
;
msgSliceIdx = [i, i + str.length];
);
strEncoded = '>' + (html.length - 1).toString() + '<';
msg = msg.slice(0, i) + strEncoded + msg.slice(i + str.length);
i = i + strEncoded.length - 1;
}
}
}
if (htmlPiece) {
html.push(htmlPiece)
strEncoded = '>' + (html.length - 1).toString() + '<';
msg = msg.slice(0, msgSliceIdx[0]) + strEncoded + msg.slice(msgSliceIdx[1]);
i = i + strEncoded.length - 1;
}
}
for (i = 1; i < msg.length - 1; i++) {
@ -605,3 +641,4 @@ function reverseHtmlEntities(str) { @@ -605,3 +641,4 @@ function reverseHtmlEntities(str) {
.replace(/&amp;/g, '&');
}

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