uBlock/platform/chromium/vapi-webrequest.js

153 lines
5.2 KiB
JavaScript

/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2017-present Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
// For background page
'use strict';
/******************************************************************************/
(function() {
const extToTypeMap = new Map([
['eot','font'],['otf','font'],['svg','font'],['ttf','font'],['woff','font'],['woff2','font'],
['mp3','media'],['mp4','media'],['webm','media'],
['gif','image'],['ico','image'],['jpeg','image'],['jpg','image'],['png','image'],['webp','image']
]);
// https://www.reddit.com/r/uBlockOrigin/comments/9vcrk3/bug_in_ubo_1173_betas_when_saving_files_hosted_on/
// Some types can be mapped from 'other', thus include 'other' if and
// only if the caller is interested in at least one of those types.
const denormalizeTypes = function(aa) {
if ( aa.length === 0 ) {
return Array.from(vAPI.net.validTypes);
}
const out = new Set();
let i = aa.length;
while ( i-- ) {
const type = aa[i];
if ( vAPI.net.validTypes.has(type) ) {
out.add(type);
}
}
if ( out.has('other') === false ) {
for ( const type of extToTypeMap.values() ) {
if ( out.has(type) ) {
out.add('other');
break;
}
}
}
return Array.from(out);
};
const headerValue = function(headers, name) {
let i = headers.length;
while ( i-- ) {
if ( headers[i].name.toLowerCase() === name ) {
return headers[i].value.trim();
}
}
return '';
};
const parsedURL = new URL('https://www.example.org/');
vAPI.net.normalizeDetails = function(details) {
// Chromium 63+ supports the `initiator` property, which contains
// the URL of the origin from which the network request was made.
if (
details.tabId === vAPI.noTabId &&
typeof details.initiator === 'string' &&
details.initiator !== 'null'
) {
details.tabId = vAPI.anyTabId;
details.documentUrl = details.initiator;
}
let type = details.type;
// https://github.com/gorhill/uBlock/issues/1493
// Chromium 49+/WebExtensions support a new request type: `ping`,
// which is fired as a result of using `navigator.sendBeacon`.
if ( type === 'ping' ) {
details.type = 'beacon';
return;
}
if ( type === 'imageset' ) {
details.type = 'image';
return;
}
// The rest of the function code is to normalize type
if ( type !== 'other' ) { return; }
// Try to map known "extension" part of URL to request type.
parsedURL.href = details.url;
const path = parsedURL.pathname,
pos = path.indexOf('.', path.length - 6);
if ( pos !== -1 && (type = extToTypeMap.get(path.slice(pos + 1))) ) {
details.type = type;
return;
}
// Try to extract type from response headers if present.
if ( details.responseHeaders ) {
type = headerValue(details.responseHeaders, 'content-type');
if ( type.startsWith('font/') ) {
details.type = 'font';
return;
}
if ( type.startsWith('image/') ) {
details.type = 'image';
return;
}
if ( type.startsWith('audio/') || type.startsWith('video/') ) {
details.type = 'media';
return;
}
}
};
vAPI.net.denormalizeFilters = function(filters) {
const urls = filters.urls || [ '<all_urls>' ];
let types = filters.types;
if ( Array.isArray(types) ) {
types = denormalizeTypes(types);
}
if (
(vAPI.net.validTypes.has('websocket')) &&
(types === undefined || types.indexOf('websocket') !== -1) &&
(urls.indexOf('<all_urls>') === -1)
) {
if ( urls.indexOf('ws://*/*') === -1 ) {
urls.push('ws://*/*');
}
if ( urls.indexOf('wss://*/*') === -1 ) {
urls.push('wss://*/*');
}
}
return { types, urls };
};
})();
/******************************************************************************/