mirror of
https://github.com/gorhill/uBlock.git
synced 2024-09-20 13:03:56 +02:00
This commit is contained in:
parent
9a209c33c6
commit
427d0fd0ff
3 changed files with 2 additions and 137 deletions
|
@ -46,7 +46,6 @@ var µBlock = (function() { // jshint ignore:line
|
|||
autoUpdatePeriod: 7,
|
||||
ignoreRedirectFilters: false,
|
||||
ignoreScriptInjectFilters: false,
|
||||
streamScriptInjectFilters: false,
|
||||
manualUpdateAssetFetchPeriod: 500,
|
||||
popupFontSize: 'unset',
|
||||
suspendTabsUntilReady: false,
|
||||
|
|
|
@ -517,16 +517,7 @@ var onMessage = function(request, sender, callback) {
|
|||
request.entity = µb.URI.entityFromDomain(request.domain);
|
||||
response.specificCosmeticFilters =
|
||||
µb.cosmeticFilteringEngine.retrieveDomainSelectors(request, response);
|
||||
// If response body filtering is supported, than the scriptlets have
|
||||
// already been injected.
|
||||
if (
|
||||
µb.canFilterResponseBody === false ||
|
||||
µb.hiddenSettings.streamScriptInjectFilters !== true ||
|
||||
µb.textEncode === undefined ||
|
||||
µb.textEncode.normalizeCharset(request.charset) === undefined
|
||||
) {
|
||||
response.scriptlets = µb.scriptletFilteringEngine.retrieve(request);
|
||||
}
|
||||
if ( request.isRootFrame && µb.logger.isEnabled() ) {
|
||||
µb.logCosmeticFilters(tabId);
|
||||
}
|
||||
|
|
|
@ -572,41 +572,24 @@ var reMediaContentTypes = /^(?:audio|image|video)\//;
|
|||
|
||||
The response body filterer is responsible for:
|
||||
|
||||
- Scriptlet filtering
|
||||
- HTML filtering
|
||||
|
||||
In the spirit of efficiency, the response body filterer works this way:
|
||||
|
||||
If:
|
||||
- HTML filtering: no.
|
||||
- Scriptlet filtering: no.
|
||||
Then:
|
||||
No response body filtering is initiated.
|
||||
|
||||
If:
|
||||
- HTML filtering: no.
|
||||
- Scriptlet filtering: yes.
|
||||
Then:
|
||||
Inject scriptlets before first chunk of response body data reported
|
||||
then immediately disconnect response body data listener.
|
||||
|
||||
If:
|
||||
- HTML filtering: yes.
|
||||
- Scriptlet filtering: no/yes.
|
||||
Then:
|
||||
Assemble all response body data into a single buffer. Once all the
|
||||
response data has been received, create a document from it. Then:
|
||||
- Inject scriptlets in the resulting DOM.
|
||||
- Remove all DOM elements matching HTML filters.
|
||||
Then serialize the resulting modified document as the new response
|
||||
body.
|
||||
|
||||
This way, the overhead is minimal for when only scriptlets need to be
|
||||
injected.
|
||||
|
||||
If the platform does not support response body filtering, the scriptlets
|
||||
will be injected the old way, through the content script.
|
||||
|
||||
**/
|
||||
|
||||
var filterDocument = (function() {
|
||||
|
@ -658,85 +641,6 @@ var filterDocument = (function() {
|
|||
}
|
||||
};
|
||||
|
||||
// Purpose of following helper is to disconnect from watching the stream
|
||||
// if all the following conditions are fulfilled:
|
||||
// - Only need to inject scriptlets.
|
||||
// - Charset of resource is utf-8.
|
||||
// - A well-formed doc type declaration is found at the top.
|
||||
//
|
||||
// When all the conditions are fulfilled, then the scriptlets are safely
|
||||
// injected after the doc type declaration, and the stream listener is
|
||||
// disconnected, thus removing overhead from future streaming data.
|
||||
//
|
||||
// If at least one of the condition is not fulfilled and scriptlets need
|
||||
// to be injected, it will be done the longer way when the whole stream
|
||||
// has been collated in memory.
|
||||
|
||||
var streamJobDone = function(filterer, responseBytes) {
|
||||
if (
|
||||
filterer.scriptlets === undefined ||
|
||||
filterer.selectors !== undefined ||
|
||||
filterer.charset === undefined
|
||||
) {
|
||||
return false;
|
||||
}
|
||||
// We need to insert after DOCTYPE, or else the browser may fall into
|
||||
// quirks mode.
|
||||
if ( responseBytes.byteLength < 256 ) { return false; }
|
||||
var bb = new Uint8Array(responseBytes, 0, 256),
|
||||
i = 0, b;
|
||||
// Skip BOM if present.
|
||||
if ( bb[0] === 0xEF && bb[1] === 0xBB && bb[2] === 0xBF ) { i += 3; }
|
||||
// Scan for '<'
|
||||
for (;;) {
|
||||
b = bb[i++];
|
||||
if ( b === 0x3C /* '<' */ ) { break; }
|
||||
if ( b > 0x20 || i > 240 ) { return false; }
|
||||
}
|
||||
// Case insensitively test for '!doctype'.
|
||||
if (
|
||||
bb[i+0] === 0x21 /* '!' */ &&
|
||||
( bb[i+1] | 0x20 ) === 0x64 /* 'd' */ &&
|
||||
( bb[i+2] | 0x20 ) === 0x6F /* 'o' */ &&
|
||||
( bb[i+3] | 0x20 ) === 0x63 /* 'c' */ &&
|
||||
( bb[i+4] | 0x20 ) === 0x74 /* 't' */ &&
|
||||
( bb[i+5] | 0x20 ) === 0x79 /* 'y' */ &&
|
||||
( bb[i+6] | 0x20 ) === 0x70 /* 'p' */ &&
|
||||
( bb[i+7] | 0x20 ) === 0x65 /* 'e' */
|
||||
) {
|
||||
i += 8;
|
||||
}
|
||||
// Case insensitively test for 'html'.
|
||||
else if (
|
||||
( bb[i+0] | 0x20 ) === 0x68 /* 'h' */ &&
|
||||
( bb[i+1] | 0x20 ) === 0x74 /* 't' */ &&
|
||||
( bb[i+2] | 0x20 ) === 0x6D /* 'm' */ &&
|
||||
( bb[i+3] | 0x20 ) === 0x6C /* 'l' */
|
||||
) {
|
||||
i += 4;
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
// Scan for '>'.
|
||||
var qcount = 0;
|
||||
for (;;) {
|
||||
b = bb[i++];
|
||||
if ( b === 0x3E /* '>' */ ) { break; }
|
||||
if ( b === 0x22 /* '"' */ || b === 0x27 /* "'" */ ) { qcount += 1; }
|
||||
if ( b > 0x7F || i > 240 ) { return false; }
|
||||
}
|
||||
// Bail out if mismatched quotes.
|
||||
if ( (qcount & 1) !== 0 ) { return false; }
|
||||
// We found a valid insertion point.
|
||||
if ( textEncoder === undefined ) { textEncoder = new TextEncoder(); }
|
||||
filterer.stream.write(new Uint8Array(responseBytes, 0, i));
|
||||
filterer.stream.write(
|
||||
textEncoder.encode('<script>' + filterer.scriptlets + '</script>')
|
||||
);
|
||||
filterer.stream.write(new Uint8Array(responseBytes, i));
|
||||
return true;
|
||||
};
|
||||
|
||||
var streamClose = function(filterer, buffer) {
|
||||
if ( buffer !== undefined ) {
|
||||
filterer.stream.write(buffer);
|
||||
|
@ -773,11 +677,6 @@ var filterDocument = (function() {
|
|||
// confirmed, there is nothing which can be done uBO-side to reduce
|
||||
// overhead.
|
||||
if ( filterer.buffer === null ) {
|
||||
if ( streamJobDone(filterer, ev.data) ) {
|
||||
filterers.delete(this);
|
||||
this.disconnect();
|
||||
return;
|
||||
}
|
||||
filterer.buffer = new Uint8Array(ev.data);
|
||||
return;
|
||||
}
|
||||
|
@ -855,11 +754,6 @@ var filterDocument = (function() {
|
|||
modified = true;
|
||||
}
|
||||
}
|
||||
if ( filterer.scriptlets !== undefined ) {
|
||||
if ( µb.scriptletFilteringEngine.apply(doc, filterer) ) {
|
||||
modified = true;
|
||||
}
|
||||
}
|
||||
|
||||
if ( modified === false ) {
|
||||
return streamClose(filterer);
|
||||
|
@ -909,32 +803,13 @@ var filterDocument = (function() {
|
|||
domain: domain,
|
||||
entity: µb.URI.entityFromDomain(domain),
|
||||
selectors: undefined,
|
||||
scriptlets: undefined,
|
||||
buffer: null,
|
||||
mime: 'text/html',
|
||||
charset: undefined
|
||||
};
|
||||
|
||||
request.selectors = µb.htmlFilteringEngine.retrieve(request);
|
||||
|
||||
// https://github.com/gorhill/uBlock/issues/3526
|
||||
// https://github.com/uBlockOrigin/uAssets/issues/1492
|
||||
// Two distinct issues, but both are arising as a result of
|
||||
// injecting scriptlets through stream filtering. So falling back
|
||||
// to "slow" scriplet injection for the time being. Stream filtering
|
||||
// (`##^`) should be used for when scriptlets are defeated by early
|
||||
// script tags on a page.
|
||||
//
|
||||
if ( µb.hiddenSettings.streamScriptInjectFilters ) {
|
||||
request.scriptlets = µb.scriptletFilteringEngine.retrieve(request);
|
||||
}
|
||||
|
||||
if (
|
||||
request.selectors === undefined &&
|
||||
request.scriptlets === undefined
|
||||
) {
|
||||
return;
|
||||
}
|
||||
if ( request.selectors === undefined ) { return; }
|
||||
|
||||
var headers = details.responseHeaders,
|
||||
contentType = headerValueFromName('content-type', headers);
|
||||
|
|
Loading…
Reference in a new issue