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Improve `no-xhr-if` scriptlet 

Related issue:
https://github.com/uBlockOrigin/uBlock-issues/issues/2518
This commit is contained in:
Raymond Hill 2023-12-10 15:21:29 -05:00
parent afcefb4b35
commit d01ad24291
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GPG Key ID: 25E1490B761470C2
1 changed files with 73 additions and 37 deletions
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110
assets/resources/scriptlets.js
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@ -2351,12 +2351,18 @@ function noXhrIf(
const propNeedles = parsePropertiesToMatch(propsToMatch, 'url');
const log = propNeedles.size === 0 ? console.log.bind(console) : undefined;
const warOrigin = scriptletGlobals.get('warOrigin');
const headers = {
'date': '',
'content-type': '',
'content-length': '',
};
self.XMLHttpRequest = class extends self.XMLHttpRequest {
open(method, url, ...args) {
if ( log !== undefined ) {
log(`uBO: xhr.open(${method}, ${url}, ${args.join(', ')})`);
return super.open(method, url, ...args);
}
xhrInstances.delete(this);
if ( warOrigin !== undefined && url.startsWith(warOrigin) ) {
return super.open(method, url, ...args);
}
@ -2364,6 +2370,7 @@ function noXhrIf(
if ( matchObjectProperties(propNeedles, haystack) ) {
xhrInstances.set(this, haystack);
}
haystack.headers = Object.assign({}, headers);
return super.open(method, url, ...args);
}
send(...args) {
@ -2371,6 +2378,7 @@ function noXhrIf(
if ( haystack === undefined ) {
return super.send(...args);
}
haystack.headers['date'] = (new Date()).toUTCString();
let promise = Promise.resolve({
xhr: this,
directive,
@ -2385,53 +2393,81 @@ function noXhrIf(
},
});
switch ( this.responseType ) {
case 'arraybuffer':
promise = promise.then(details => {
details.props.response.value = new ArrayBuffer(0);
case 'arraybuffer':
promise = promise.then(details => {
details.props.response.value = new ArrayBuffer(0);
return details;
});
haystack.headers['content-type'] = 'application/octet-stream';
break;
case 'blob':
promise = promise.then(details => {
details.props.response.value = new Blob([]);
return details;
});
haystack.headers['content-type'] = 'application/octet-stream';
break;
case 'document': {
promise = promise.then(details => {
const parser = new DOMParser();
const doc = parser.parseFromString('', 'text/html');
details.props.response.value = doc;
details.props.responseXML.value = doc;
return details;
});
haystack.headers['content-type'] = 'text/html';
break;
}
case 'json':
promise = promise.then(details => {
details.props.response.value = {};
details.props.responseText.value = '{}';
return details;
});
haystack.headers['content-type'] = 'application/json';
break;
default:
if ( directive === '' ) { break; }
promise = promise.then(details => {
return generateContentFn(details.directive).then(text => {
details.props.response.value = text;
details.props.responseText.value = text;
return details;
});
break;
case 'blob':
promise = promise.then(details => {
details.props.response.value = new Blob([]);
return details;
});
break;
case 'document': {
promise = promise.then(details => {
const parser = new DOMParser();
const doc = parser.parseFromString('', 'text/html');
details.props.response.value = doc;
details.props.responseXML.value = doc;
return details;
});
break;
}
case 'json':
promise = promise.then(details => {
details.props.response.value = {};
details.props.responseText.value = '{}';
return details;
});
break;
default:
if ( directive === '' ) { break; }
promise = promise.then(details => {
return generateContentFn(details.directive).then(text => {
details.props.response.value = text;
details.props.responseText.value = text;
return details;
});
});
break;
});
haystack.headers['content-type'] = 'text/plain';
break;
}
promise.then(details => {
haystack.headers['content-length'] = `${details.props.response.value}`.length;
Object.defineProperties(details.xhr, details.props);
details.xhr.dispatchEvent(new Event('readystatechange'));
details.xhr.dispatchEvent(new Event('load'));
details.xhr.dispatchEvent(new Event('loadend'));
});
}
getResponseHeader(headerName) {
const haystack = xhrInstances.get(this);
if ( haystack === undefined || this.readyState < this.HEADERS_RECEIVED ) {
return super.getResponseHeader(headerName);
}
const value = haystack.headers[headerName.toLowerCase()];
if ( value !== undefined && value !== '' ) { return value; }
return null;
}
getAllResponseHeaders() {
const haystack = xhrInstances.get(this);
if ( haystack === undefined || this.readyState < this.HEADERS_RECEIVED ) {
return super.getAllResponseHeaders();
}
const out = [];
for ( const [ name, value ] of Object.entries(haystack.headers) ) {
if ( !value ) { continue; }
out.push(`${name}: ${value}`);
}
if ( out.length !== 0 ) { out.push(''); }
return out.join('\r\n');
}
};
}