298 lines
7.4 KiB
JavaScript
298 lines
7.4 KiB
JavaScript
/*
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***** BEGIN LICENSE BLOCK *****
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Copyright © 2009 Center for History and New Media
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George Mason University, Fairfax, Virginia, USA
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http://zotero.org
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This file is part of Zotero.
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Zotero is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Zotero is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with Zotero. If not, see <http://www.gnu.org/licenses/>.
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***** END LICENSE BLOCK *****
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*/
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Zotero.DataServer = new function () {
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this.init = init;
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this.handleHeader = handleHeader;
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// TODO: assign dynamically
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this.__defineGetter__('port', function () {
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return 22030;
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});
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var _onlineObserverRegistered;
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/*
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* initializes a very rudimentary web server used for SOAP RPC
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*/
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function init() {
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// Use Zeroconf pref for now
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if (!Zotero.Prefs.get("zeroconf.server.enabled")) {
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Zotero.debug("Not initializing data HTTP server");
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return;
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}
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if (Zotero.HTTP.browserIsOffline()) {
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Zotero.debug('Browser is offline -- not initializing data HTTP server');
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_registerOnlineObserver()
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return;
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}
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// start listening on socket
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var serv = Components.classes["@mozilla.org/network/server-socket;1"]
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.createInstance(Components.interfaces.nsIServerSocket);
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try {
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serv.init(this.port, false, -1);
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serv.asyncListen(Zotero.DataServer.SocketListener);
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Zotero.debug("Data HTTP server listening on 127.0.0.1:" + serv.port);
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}
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catch(e) {
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Zotero.debug("Not initializing data HTTP server");
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}
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_registerOnlineObserver()
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}
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/*
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* handles an HTTP request
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*/
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function handleHeader(header) {
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// get first line of request (all we care about for now)
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var method = header.substr(0, header.indexOf(" "));
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if (!method) {
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return _generateResponse("400 Bad Request");
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}
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if (method != "POST") {
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return _generateResponse("501 Method Not Implemented");
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}
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// Parse request URI
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var matches = header.match("^[A-Z]+ (\/.*) HTTP/1.[01]");
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if (!matches) {
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return _generateResponse("400 Bad Request");
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}
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var response = _handleRequest(matches[1]);
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// return OK
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return _generateResponse("200 OK", 'text/xml; charset="UTF-8"', response);
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}
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function _handleRequest(uri) {
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var s = new Zotero.Search();
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s.addCondition('noChildren', 'true');
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var ids = s.search();
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if (!ids) {
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ids = [];
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}
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var uploadIDs = {
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updated: {
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items: ids
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},
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/* TODO: fix buildUploadXML to ignore missing */
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deleted: {}
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};
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return Zotero.Sync.Server.Data.buildUploadXML(uploadIDs);
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}
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/*
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* generates the response to an HTTP request
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*/
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function _generateResponse(status, contentType, body) {
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var response = "HTTP/1.0 "+status+"\r\n";
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if(body) {
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if(contentType) {
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response += "Content-Type: "+contentType+"\r\n";
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}
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response += "\r\n"+body;
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} else {
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response += "Content-Length: 0\r\n\r\n"
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}
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return response;
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}
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function _registerOnlineObserver() {
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if (_onlineObserverRegistered) {
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return;
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}
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// Observer to enable the integration when we go online
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var observer = {
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observe: function(subject, topic, data) {
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if (data == 'online') {
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Zotero.Integration.init();
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}
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}
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};
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var observerService =
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Components.classes["@mozilla.org/observer-service;1"]
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.getService(Components.interfaces.nsIObserverService);
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observerService.addObserver(observer, "network:offline-status-changed", false);
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_onlineObserverRegistered = true;
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}
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}
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Zotero.DataServer.SocketListener = new function() {
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this.onSocketAccepted = onSocketAccepted;
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/*
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* called when a socket is opened
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*/
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function onSocketAccepted(socket, transport) {
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// get an input stream
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var iStream = transport.openInputStream(0, 0, 0);
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var oStream = transport.openOutputStream(0, 0, 0);
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var dataListener = new Zotero.DataServer.DataListener(iStream, oStream);
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var pump = Components.classes["@mozilla.org/network/input-stream-pump;1"]
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.createInstance(Components.interfaces.nsIInputStreamPump);
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pump.init(iStream, -1, -1, 0, 0, false);
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pump.asyncRead(dataListener, null);
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}
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}
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/*
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* handles the actual acquisition of data
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*/
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Zotero.DataServer.DataListener = function(iStream, oStream) {
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this.header = "";
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this.headerFinished = false;
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this.body = "";
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this.bodyLength = 0;
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this.iStream = iStream;
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this.oStream = oStream;
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this.sStream = Components.classes["@mozilla.org/scriptableinputstream;1"]
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.createInstance(Components.interfaces.nsIScriptableInputStream);
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this.sStream.init(iStream);
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this.foundReturn = false;
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}
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/*
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* called when a request begins (although the request should have begun before
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* the DataListener was generated)
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*/
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Zotero.DataServer.DataListener.prototype.onStartRequest = function(request, context) {}
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/*
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* called when a request stops
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*/
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Zotero.DataServer.DataListener.prototype.onStopRequest = function(request, context, status) {
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this.iStream.close();
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this.oStream.close();
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}
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/*
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* called when new data is available
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*/
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Zotero.DataServer.DataListener.prototype.onDataAvailable = function(request, context,
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inputStream, offset, count) {
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var readData = this.sStream.read(count);
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// Read header
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if (!this.headerFinished) {
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// see if there's a magic double return
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var lineBreakIndex = readData.indexOf("\r\n\r\n");
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if (lineBreakIndex != -1) {
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if (lineBreakIndex != 0) {
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this.header += readData.substr(0, lineBreakIndex+4);
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}
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this._headerFinished();
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return;
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}
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var lineBreakIndex = readData.indexOf("\n\n");
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if (lineBreakIndex != -1) {
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if (lineBreakIndex != 0) {
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this.header += readData.substr(0, lineBreakIndex+2);
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}
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this._headerFinished();
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return;
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}
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if (this.header && this.header[this.header.length-1] == "\n" &&
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(readData[0] == "\n" || readData[0] == "\r")) {
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if (readData.length > 1 && readData[1] == "\n") {
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this.header += readData.substr(0, 2);
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}
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else {
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this.header += readData[0];
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}
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this._headerFinished();
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return;
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}
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this.header += readData;
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}
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}
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/*
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* processes an HTTP header and decides what to do
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*/
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Zotero.DataServer.DataListener.prototype._headerFinished = function() {
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this.headerFinished = true;
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var output = Zotero.DataServer.handleHeader(this.header);
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this._requestFinished(output);
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}
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/*
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* returns HTTP data from a request
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*/
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Zotero.DataServer.DataListener.prototype._requestFinished = function(response) {
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// close input stream
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this.iStream.close();
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// open UTF-8 converter for output stream
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var intlStream = Components.classes["@mozilla.org/intl/converter-output-stream;1"]
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.createInstance(Components.interfaces.nsIConverterOutputStream);
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// write
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try {
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intlStream.init(this.oStream, "UTF-8", 1024, "?".charCodeAt(0));
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Zotero.debug('Writing response to stream:\n\n' + response);
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// write response
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intlStream.writeString(response);
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} catch(e) {
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Zotero.debug("An error occurred.");
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Zotero.debug(e);
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} finally {
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Zotero.debug('Closing stream');
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intlStream.close();
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}
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}
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