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uBlock/platform/chromium/vapi-webrequest.js

272 lines
8.8 KiB
JavaScript

/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2017-2018 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';
/******************************************************************************/
vAPI.net = {
onBeforeRequest: {},
onBeforeMaybeSpuriousCSPReport: {},
onHeadersReceived: {},
nativeCSPReportFiltering: false
};
vAPI.net.registerListeners = function() {
var µb = µBlock,
µburi = µb.URI,
wrApi = chrome.webRequest;
// https://bugs.chromium.org/p/chromium/issues/detail?id=410382
// Between Chromium 38-48, plug-ins' network requests were reported as
// type "other" instead of "object".
var is_v38_48 = /\bChrom[a-z]+\/(?:3[89]|4[0-8])\.[\d.]+\b/.test(navigator.userAgent);
// legacy Chromium understands only these network request types.
var validTypes = {
main_frame: true,
sub_frame: true,
stylesheet: true,
script: true,
image: true,
object: true,
xmlhttprequest: true,
other: true
};
// modern Chromium/WebExtensions: more types available.
if ( wrApi.ResourceType ) {
(function() {
for ( var typeKey in wrApi.ResourceType ) {
if ( wrApi.ResourceType.hasOwnProperty(typeKey) ) {
validTypes[wrApi.ResourceType[typeKey]] = true;
}
}
})();
}
var 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']
]);
var denormalizeTypes = function(aa) {
if ( aa.length === 0 ) {
return Object.keys(validTypes);
}
var out = [];
var i = aa.length,
type,
needOther = true;
while ( i-- ) {
type = aa[i];
if ( validTypes[type] ) {
out.push(type);
}
if ( type === 'other' ) {
needOther = false;
}
}
if ( needOther ) {
out.push('other');
}
return out;
};
var headerValue = function(headers, name) {
var i = headers.length;
while ( i-- ) {
if ( headers[i].name.toLowerCase() === name ) {
return headers[i].value.trim();
}
}
return '';
};
var normalizeRequestDetails = 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.tabId = vAPI.anyTabId;
details.documentUrl = details.initiator;
}
var 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.
var path = µburi.pathFromURI(details.url),
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;
}
}
// https://github.com/chrisaljoudi/uBlock/issues/862
// If no transposition possible, transpose to `object` as per
// Chromium bug 410382
// https://code.google.com/p/chromium/issues/detail?id=410382
if ( is_v38_48 ) {
details.type = 'object';
}
};
var onBeforeRequestClient = this.onBeforeRequest.callback;
var onBeforeRequest = function(details) {
normalizeRequestDetails(details);
return onBeforeRequestClient(details);
};
// This is needed for Chromium 49-55.
var onBeforeSendHeaders = validTypes.csp_report
// modern Chromium/WebExtensions: type 'csp_report' is supported
? null
// legacy Chromium
: function(details) {
if ( details.type !== 'ping' || details.method !== 'POST' ) { return; }
var type = headerValue(details.requestHeaders, 'content-type');
if ( type === '' ) { return; }
if ( type.endsWith('/csp-report') ) {
details.type = 'csp_report';
return onBeforeRequestClient(details);
}
};
var onHeadersReceivedClient = this.onHeadersReceived.callback,
onHeadersReceivedClientTypes = this.onHeadersReceived.types.slice(0),
onHeadersReceivedTypes = denormalizeTypes(onHeadersReceivedClientTypes);
var onHeadersReceived = function(details) {
normalizeRequestDetails(details);
if (
onHeadersReceivedClientTypes.length !== 0 &&
onHeadersReceivedClientTypes.indexOf(details.type) === -1
) {
return;
}
return onHeadersReceivedClient(details);
};
var urls, types;
if ( onBeforeRequest ) {
urls = this.onBeforeRequest.urls || ['<all_urls>'];
types = this.onBeforeRequest.types || undefined;
if (
(validTypes.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://*/*');
}
}
wrApi.onBeforeRequest.addListener(
onBeforeRequest,
{ urls: urls, types: types },
this.onBeforeRequest.extra
);
}
// https://github.com/gorhill/uBlock/issues/3140
this.nativeCSPReportFiltering = validTypes.csp_report;
if (
this.nativeCSPReportFiltering &&
typeof this.onBeforeMaybeSpuriousCSPReport.callback === 'function'
) {
wrApi.onBeforeRequest.addListener(
this.onBeforeMaybeSpuriousCSPReport.callback,
{
urls: [ 'http://*/*', 'https://*/*' ],
types: [ 'csp_report' ]
},
[ 'blocking', 'requestBody' ]
);
}
// Chromium 48 and lower does not support `ping` type.
// Chromium 56 and higher does support `csp_report` stype.
if ( onBeforeSendHeaders ) {
wrApi.onBeforeSendHeaders.addListener(
onBeforeSendHeaders,
{
'urls': [ '<all_urls>' ],
'types': [ 'ping' ]
},
[ 'blocking', 'requestHeaders' ]
);
}
if ( onHeadersReceived ) {
urls = this.onHeadersReceived.urls || ['<all_urls>'];
types = onHeadersReceivedTypes;
wrApi.onHeadersReceived.addListener(
onHeadersReceived,
{ urls: urls, types: types },
this.onHeadersReceived.extra
);
}
};
/******************************************************************************/