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/*******************************************************************************
ηMatrix - a browser extension to black/white list requests.
Copyright (C) 2014-2019 The uMatrix/uBlock Origin authors
Copyright (C) 2019-2020 Alessio Vanni
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://libregit.org/heckyel/ematrix
uMatrix Home: https://github.com/gorhill/uMatrix
*/
'use strict';
var EXPORTED_SYMBOLS = ['HTTPRequestHeaders'];
var junkyard = [];
var HTTPRequestHeaders = function (channel) {
this.init(channel);
};
HTTPRequestHeaders.factory = function (channel) {
let entry = junkyard.pop();
if (entry) {
return entry.init(channel);
}
return new HTTPRequestHeaders(channel);
}
HTTPRequestHeaders.prototype.init = function (channel) {
this.channel = channel;
this.headers = new Array();
this.originalHeaderNames = new Array();
channel.visitRequestHeaders({
visitHeader: function (name, value) {
this.headers.push({name: name, value: value});
this.originalHeaderNames.push(name);
}.bind(this)
});
return this;
};
HTTPRequestHeaders.prototype.dispose = function () {
this.channel = null;
this.headers = null;
this.originalHeaderNames = null;
junkyard.push(this);
};
HTTPRequestHeaders.prototype.update = function () {
let newHeaderNames = new Set();
for (let header of this.headers) {
this.setHeader(header.name, header.value, true);
newHeaderNames.add(header.name);
}
//Clear any headers that were removed
for (let name of this.originalHeaderNames) {
if (!newHeaderNames.has(name)) {
this.channel.setRequestHeader(name, '', false);
}
}
};
HTTPRequestHeaders.prototype.getHeader = function (name) {
try {
return this.channel.getRequestHeader(name);
} catch (e) {
// Ignore
}
return '';
};
HTTPRequestHeaders.prototype.setHeader = function (name, newValue, create) {
let oldValue = this.getHeader(name);
if (newValue === oldValue) {
return false;
}
if (oldValue === '' && create !== true) {
return false;
}
this.channel.setRequestHeader(name, newValue, false);
return true;
};
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