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Revert "Change links in webUI to rewrite misleading links (#11426)" (#11500)

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This reverts commit b31b232edf.
This commit is contained in:
Eugen Rochko
2019-08-06 12:09:28 +02:00
committed by GitHub
parent 111a0628fc
commit 1d8d553d8b
3 changed files with 10 additions and 101 deletions
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90
app/javascript/mastodon/components/status_content.js
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@@ -8,71 +8,9 @@ import classnames from 'classnames';
import PollContainer from 'mastodon/containers/poll_container';
import Icon from 'mastodon/components/icon';
import { autoPlayGif } from 'mastodon/initial_state';
import { decode as decodeIDNA } from 'mastodon/utils/idna';
const MAX_HEIGHT = 642; // 20px * 32 (+ 2px padding at the top)
// Regex matching what "looks like a link", that is, something that starts with
// an optional "http://" or "https://" scheme and then what could look like a
// domain main, that is, at least two sequences of characters not including spaces
// and separated by "." or an homoglyph. The idea is not to match valid URLs or
// domain names, but what could be confused for a valid URL or domain name,
// especially to the untrained eye.
const h_confusables = 'h\u13c2\u1d58d\u1d4f1\u1d691\u0068\uff48\u1d525\u210e\u1d489\u1d629\u0570\u1d4bd\u1d65d\u1d421\u1d5c1\u1d5f5\u04bb\u1d559';
const t_confusables = 't\u1d42d\u1d5cd\u1d531\u1d565\u1d4c9\u1d669\u1d4fd\u1d69d\u0074\u1d461\u1d601\u1d495\u1d635\u1d599';
const p_confusables = 'p\u0440\u03c1\u1d52d\u1d631\u1d665\u1d429\uff50\u1d6e0\u1d45d\u1d561\u1d595\u1d71a\u1d699\u1d78e\u2ca3\u1d754\u1d6d2\u1d491\u1d7c8\u1d746\u1d4c5\u1d70c\u1d5c9\u0070\u1d780\u03f1\u1d5fd\u2374\u1d7ba\u1d4f9';
const s_confusables = 's\u1d530\u118c1\u1d494\u1d634\u1d4c8\u1d668\uabaa\u1d42c\u1d5cc\u1d460\u1d600\ua731\u0073\uff53\u1d564\u0455\u1d598\u1d4fc\u1d69c\u10448\u01bd';
const column_confusables = ':\u0903\u0a83\u0703\u1803\u05c3\u0704\u0589\u1809\ua789\u16ec\ufe30\u02d0\u2236\u02f8\u003a\uff1a\u205a\ua4fd';
const slash_confusables = '/\u2041\u2f03\u2044\u2cc6\u27cb\u30ce\u002f\u2571\u31d3\u3033\u1735\u2215\u29f8\u1d23a\u4e3f';
const dot_confusables = '.\u002e\u0660\u06f0\u0701\u0702\u2024\ua4f8\ua60e\u10a50\u1d16d';
const linkRegex = new RegExp(`^\\s*(([${h_confusables}][${t_confusables}][${t_confusables}][${p_confusables}][${s_confusables}]?[${column_confusables}][${slash_confusables}][${slash_confusables}]))?[^:/\\n ]+([${dot_confusables}][^:/\\n ]+)+`);
const isLinkMisleading = (link) => {
let linkTextParts = [];
// Reconstruct visible text, as we do not have much control over how links
// from remote software look, and we can't rely on `innerText` because the
// `invisible` class does not set `display` to `none`.
const walk = (node) => {
switch (node.nodeType) {
case Node.TEXT_NODE:
linkTextParts.push(node.textContent);
break;
case Node.ELEMENT_NODE:
if (node.classList.contains('invisible')) return;
const children = node.childNodes;
for (let i = 0; i < children.length; i++) {
walk(children[i]);
}
break;
}
};
walk(link);
const linkText = linkTextParts.join('');
const targetURL = new URL(link.href);
// The following may not work with international domain names
if (linkText === targetURL.origin || linkText === targetURL.host || 'www.' + linkText === targetURL.host || linkText.startsWith(targetURL.origin + '/') || linkText.startsWith(targetURL.host + '/')) {
return false;
}
// The link hasn't been recognized, maybe it features an international domain name
const hostname = decodeIDNA(targetURL.hostname);
const host = targetURL.host.replace(targetURL.hostname, hostname);
const origin = targetURL.origin.replace(targetURL.host, host);
if (linkText === origin || linkText === host || linkText.startsWith(origin + '/') || linkText.startsWith(host + '/')) {
return false;
}
// If the link text looks like an URL or auto-generated link, it is misleading
return linkRegex.test(linkText);
};
export default class StatusContent extends React.PureComponent {
static contextTypes = {
@@ -118,34 +56,6 @@ export default class StatusContent extends React.PureComponent {
} else {
link.setAttribute('title', link.href);
link.classList.add('unhandled-link');
if (isLinkMisleading(link)) {
while (link.firstChild) {
link.removeChild(link.firstChild);
}
const prefix = (link.href.match(/https?:\/\/(www\.)?/) || [''])[0];
const text = link.href.substr(prefix.length, 30);
const suffix = link.href.substr(prefix.length + 30);
const cutoff = !!suffix;
const prefixTag = document.createElement('span');
prefixTag.classList.add('invisible');
prefixTag.textContent = prefix;
link.appendChild(prefixTag);
const textTag = document.createElement('span');
if (cutoff) {
textTag.classList.add('ellipsis');
}
textTag.textContent = text;
link.appendChild(textTag);
const suffixTag = document.createElement('span');
suffixTag.classList.add('invisible');
suffixTag.textContent = suffix;
link.appendChild(suffixTag);
}
}
link.setAttribute('target', '_blank');

11
app/javascript/mastodon/features/status/components/card.js
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@@ -2,9 +2,18 @@ import React from 'react';
import PropTypes from 'prop-types';
import Immutable from 'immutable';
import ImmutablePropTypes from 'react-immutable-proptypes';
import punycode from 'punycode';
import classnames from 'classnames';
import Icon from 'mastodon/components/icon';
import { decode as decodeIDNA } from 'mastodon/utils/idna';
const IDNA_PREFIX = 'xn--';
const decodeIDNA = domain => {
return domain
.split('.')
.map(part => part.indexOf(IDNA_PREFIX) === 0 ? punycode.decode(part.slice(IDNA_PREFIX.length)) : part)
.join('.');
};
const getHostname = url => {
const parser = document.createElement('a');

10
app/javascript/mastodon/utils/idna.js
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@@ -1,10 +0,0 @@
import punycode from 'punycode';
const IDNA_PREFIX = 'xn--';
export const decode = domain => {
return domain
.split('.')
.map(part => part.indexOf(IDNA_PREFIX) === 0 ? punycode.decode(part.slice(IDNA_PREFIX.length)) : part)
.join('.');
};