Adds rudimentary Zeroconf support to Zotero (a.k.a. "Z(ot)eroconf")

- Inspired by Dan Chudnov's Python/MODS-based Zeroconf demo at THATcamp
- Enabled by extensions.zotero.zeroconf.enabled (off by default)
- Currently supports only OS X (tested on Leopard, not sure about earlier versions)
- Uses Apple's dns-sd and mDNS command-client clients, but should be able to be extended to other clients, though a native library would be far superior
- Discovery is on-demand for now via Actions menu ("Search for Shared Libraries")
- Includes rudimentary web server (code copied from integration.js) that serves items as sync XML -- no authentication yet!
- Only supports top-level items
- Remote libraries show up in left pane (under remote computer name, for now)
- Items can be dragged into collections (but not the library yet, for some reason)
- On first run, might cause a long pause and the "This file was downloaded from the Internet" message on Leopard -- can't manage to get around the quarantine for the script file that we need to access stdout from Firefox
- Needs a lot of work, and without a real JS (or otherwise Mozilla-native) Zeroconf library we can't do proper discovery without intermittent polling
- But it works, at least for me

Also includes some data/sync-layer changes that I needed along the way (and that we'll need for shared collections of any type)

chrome/content/zotero/itemPane.js

@@ -70,7 +70,7 @@ var ZoteroItemPane = new function() {
 	/*
 	 * Loads an item 
 	 */
-	function viewItem(thisItem) {
+	function viewItem(thisItem, mode) {
 		//Zotero.debug('Viewing item');
 		
 		// Force blur() when clicking off a textbox to another item in middle
@@ -100,11 +100,11 @@ var ZoteroItemPane = new function() {
 		_itemBeingEdited = thisItem;
 		_loaded = {};
 		
-		loadPane(_tabs.selectedIndex);
+		loadPane(_tabs.selectedIndex, mode);
 	}
 	
 	
-	function loadPane(index) {
+	function loadPane(index, mode) {
 		//Zotero.debug('Loading item pane ' + index);
 		
 		// Clear the tab index when switching panes
@@ -121,7 +121,14 @@ var ZoteroItemPane = new function() {
 		// Info pane
 		if (index == 0) {
 			var itembox = document.getElementById('zotero-editpane-item-box');
-			itembox.mode = 'edit';
+			// Hack to allow read-only mode in right pane -- probably a better
+			// way to allow access to this
+			if (mode) {
+				itembox.mode = mode;
+			}
+			else {
+				itembox.mode = 'edit';
+			}
 			itembox.item = _itemBeingEdited;
 		}
 		

chrome/content/zotero/overlay.js

@@ -788,7 +788,12 @@ var ZoteroPane = new function()
 			if(item.ref.isNote())
 			{
 				var noteEditor = document.getElementById('zotero-note-editor');
-				noteEditor.mode = 'edit';
+				if (this.itemsView.readOnly) {
+					noteEditor.mode = 'view';
+				}
+				else {
+					noteEditor.mode = 'edit';
+				}
 				
 				// If loading new or different note, disable undo while we repopulate the text field
 				// so Undo doesn't end up clearing the field. This also ensures that Undo doesn't
@@ -953,7 +958,7 @@ var ZoteroPane = new function()
 			}
 			else
 			{
-				ZoteroItemPane.viewItem(item.ref);
+				ZoteroItemPane.viewItem(item.ref, this.itemsView.readOnly ? 'view' : false);
 				document.getElementById('zotero-item-pane-content').selectedIndex = 1;
 			}
 		}
@@ -1056,7 +1061,8 @@ var ZoteroPane = new function()
 					var noPrompt = true;
 				}
 				// Do nothing in search view
-				else if (this.itemsView._itemGroup.isSearch()) {
+				else if (this.itemsView._itemGroup.isSearch() ||
+						this.itemsView._itemGroup.isShare()) {
 					return;
 				}
 			}
@@ -1465,7 +1471,14 @@ var ZoteroPane = new function()
 		
 		var enable = [], disable = [], show = [], hide = [], multiple = '';
 		
-		if (this.itemsView && this.itemsView.selection.count > 0) {
+		// TODO: implement menu for remote items
+		if (this.itemsView.readOnly) {
+			for each(var pos in m) {
+				disable.push(pos);
+			}
+		}
+		
+		else if (this.itemsView && this.itemsView.selection.count > 0) {
 			enable.push(m.showInLibrary, m.addNote, m.attachSnapshot, m.attachLink,
 				m.sep2, m.duplicateItem, m.deleteItem, m.deleteFromLibrary,
 				m.exportItems, m.createBib, m.loadReport);
@@ -1607,6 +1620,10 @@ var ZoteroPane = new function()
 				}
 			}
 			else if (tree.id == 'zotero-items-tree') {
+				if (this.itemsView.readOnly) {
+					return;
+				}
+				
 				if (this.itemsView && this.itemsView.selection.currentIndex > -1) {
 					var item = this.getSelectedItems()[0];
 					if (item && item.isNote()) {

chrome/content/zotero/overlay.xul

@@ -124,6 +124,8 @@
 								<menuitem id="zotero-tb-actions-import" label="&zotero.toolbar.import.label;" oncommand="Zotero_File_Interface.importFile();"/>
 								<menuitem id="zotero-tb-actions-export" label="&zotero.toolbar.export.label;" oncommand="Zotero_File_Interface.exportFile();"/>
 								<menuseparator id="zotero-tb-actions-utilities-separator"/>
+								<menuitem id="zotero-tb-actions-zeroconf-update" label="Search for Shared Libraries"
+									oncommand="Zotero.Zeroconf.findInstances()"/>
 								<menuitem id="zotero-tb-actions-timeline" label="&zotero.toolbar.timeline.label;" oncommand="Zotero_Timeline_Interface.loadTimeline()"/>
 								<menuseparator id="zotero-tb-actions-sync-separator"/>
 								<menuitem label="Clear Server Data" oncommand="Zotero.Sync.Server.clear()"/>

chrome/content/zotero/xpcom/collectionTreeView.js

@@ -36,7 +36,7 @@ Zotero.CollectionTreeView = function()
 	this._treebox = null;
 	this.itemToSelect = null;
 	this._highlightedRows = {};
-	this._unregisterID = Zotero.Notifier.registerObserver(this, ['collection', 'search']);
+	this._unregisterID = Zotero.Notifier.registerObserver(this, ['collection', 'search', 'share']);
 }
 
 /*
@@ -107,6 +107,13 @@ Zotero.CollectionTreeView.prototype.refresh = function()
 		}
 	}
 	
+	var shares = Zotero.Zeroconf.instances;
+	if (shares) {
+		for each(var share in shares) {
+			this._showItem(new Zotero.ItemGroup('share', share), 0, this._dataItems.length); //itemgroup ref, level, beforeRow
+		}
+	}
+	
 	this._refreshHashMap();
 	
 	// Update the treebox's row count
@@ -162,8 +169,16 @@ Zotero.CollectionTreeView.prototype.notify = function(action, type, ids)
 	
 	var madeChanges = false;
 	
-	if(action == 'delete')
-	{
+	if (action == 'refresh') {
+		switch (type) {
+			case 'share':
+				this.reload();
+				this.rememberSelection(savedSelection);
+				break;
+		}
+	}
+	
+	else if(action == 'delete') {
 		//Since a delete involves shifting of rows, we have to do it in order
 		
 		//sort the ids by row
@@ -672,6 +687,16 @@ Zotero.CollectionTreeView.prototype.canDrop = function(row, orient)
 			}
 			return false;
 		}
+		else if (dataType == 'zotero/item-xml') {
+			var xml = new XML(data.data);
+			for each(var xmlNode in xml.items.item) {
+				var item = Zotero.Sync.Server.Data.xmlToItem(xmlNode);
+				if (item.isRegularItem() || !item.getSource()) {
+					return true;
+				}
+			}
+			return false;
+		}
 		else if (dataType == 'text/x-moz-url'
 				|| dataType == 'application/x-moz-file') {
 			if (this._getItemAtRow(row).isSearch()) {
@@ -733,6 +758,25 @@ Zotero.CollectionTreeView.prototype.drop = function(row, orient)
 			this._getItemAtRow(row).ref.addItems(toAdd);
 		}
 	}
+	else if (dataType == 'zotero/item-xml') {
+		Zotero.DB.beginTransaction();
+		var xml = new XML(data.data);
+		var toAdd = [];
+		for each(var xmlNode in xml.items.item) {
+			var item = Zotero.Sync.Server.Data.xmlToItem(xmlNode, false, true);
+			if (item.isRegularItem() || !item.getSource()) {
+				var id = item.save();
+				toAdd.push(id);
+			}
+		}
+		if (toAdd.length > 0) {
+			this._getItemAtRow(row).ref.addItems(toAdd);
+		}
+		
+		Zotero.DB.commitTransaction();
+		
+		return;
+	}
 	else if (dataType == 'text/x-moz-url' || dataType == 'application/x-moz-file') {
 		if (this._getItemAtRow(row).isCollection()) {
 			var parentCollectionID = this._getItemAtRow(row).ref.id;
@@ -820,6 +864,7 @@ Zotero.CollectionTreeView.prototype.getSupportedFlavours = function ()
 	var flavors = new FlavourSet();
 	flavors.appendFlavour("zotero/collection");
 	flavors.appendFlavour("zotero/item");
+	flavors.appendFlavour("zotero/item-xml");
 	flavors.appendFlavour("text/x-moz-url");
 	flavors.appendFlavour("application/x-moz-file", "nsIFile");
 	return flavors; 
@@ -884,6 +929,11 @@ Zotero.ItemGroup.prototype.isSearch = function()
 	return this.type == 'search';
 }
 
+Zotero.ItemGroup.prototype.isShare = function()
+{
+	return this.type == 'share';
+}
+
 Zotero.ItemGroup.prototype.getName = function()
 {
 	if (this.isCollection()) {
@@ -895,6 +945,9 @@ Zotero.ItemGroup.prototype.getName = function()
 	else if (this.isSearch()) {
 		return this.ref.name;
 	}
+	else if (this.isShare()) {
+		return this.ref.name;
+	}
 	else {
 		return "";
 	}
@@ -902,6 +955,11 @@ Zotero.ItemGroup.prototype.getName = function()
 
 Zotero.ItemGroup.prototype.getChildItems = function()
 {
+	// Fake results if this is a shared library
+	if (this.isShare()) {
+		return this.ref.getAll();
+	}
+	
 	var s = this.getSearchObject();
 	try {
 		var ids = s.search();
@@ -970,6 +1028,11 @@ Zotero.ItemGroup.prototype.getSearchObject = function() {
  * Returns all the tags used by items in the current view
  */
 Zotero.ItemGroup.prototype.getChildTags = function() {
+	// TODO: implement?
+	if (this.isShare()) {
+		return false;
+	}
+	
 	var s = this.getSearchObject();
 	return Zotero.Tags.getAllWithinSearch(s);
 }

chrome/content/zotero/xpcom/data/item.js

@@ -1765,6 +1765,10 @@ Zotero.Item.prototype.getNoteTitle = function() {
 		return this._noteTitle;
 	}
 	
+	if (!this.id) {
+		return '';
+	}
+	
 	var sql = "SELECT title FROM itemNotes WHERE itemID=?";
 	var title = Zotero.DB.valueQuery(sql, this.id);
 	
@@ -1782,10 +1786,6 @@ Zotero.Item.prototype.getNote = function() {
 		throw ("getNote() can only be called on notes and attachments");
 	}
 	
-	if (!this.id) {
-		return '';
-	}
-	
 	// Store access time for later garbage collection
 	this._noteAccessTime = new Date();
 	
@@ -1793,6 +1793,10 @@ Zotero.Item.prototype.getNote = function() {
 		return this._noteText;
 	}
 	
+	if (!this.id) {
+		return '';
+	}
+	
 	var sql = "SELECT note FROM itemNotes WHERE itemID=" + this.id;
 	var note = Zotero.DB.valueQuery(sql);
 	

chrome/content/zotero/xpcom/data/tags.js

@@ -163,7 +163,8 @@ Zotero.Tags = new function() {
 			var tmpTable = search.search(true);
 		}
 		catch (e) {
-			if (e.match(/Saved search [0-9]+ does not exist/)) {
+			if (typeof e == 'string'
+					&& e.match(/Saved search [0-9]+ does not exist/)) {
 				Zotero.DB.rollbackTransaction();
 				Zotero.debug(e, 2);
 			}

chrome/content/zotero/xpcom/dataServer.js

@@ -0,0 +1,271 @@
+Zotero.DataServer = new function () {
+	this.init = init;
+	this.handleHeader = handleHeader;
+	
+	// TODO: assign dynamically
+	this.__defineGetter__('port', function () {
+		return 22030;
+	});
+	
+	var _onlineObserverRegistered;
+	
+	
+	/*
+	 * initializes a very rudimentary web server used for SOAP RPC
+	 */
+	function init() {
+		// Use Zeroconf pref for now
+		if (!Zotero.Prefs.get("zeroconf.server.enabled")) {
+			Zotero.debug("Not initializing data HTTP server");
+			return;
+		}
+		
+		if (Zotero.Utilities.HTTP.browserIsOffline()) {
+			Zotero.debug('Browser is offline -- not initializing data HTTP server');
+			_registerOnlineObserver()
+			return;
+		}
+		
+		// start listening on socket
+		var serv = Components.classes["@mozilla.org/network/server-socket;1"]
+					.createInstance(Components.interfaces.nsIServerSocket);
+		try {
+			serv.init(this.port, false, -1);
+			serv.asyncListen(Zotero.DataServer.SocketListener);
+			
+			Zotero.debug("Data HTTP server listening on 127.0.0.1:" + serv.port);
+		}
+		catch(e) {
+			Zotero.debug("Not initializing data HTTP server");
+		}
+		
+		_registerOnlineObserver()
+	}
+	
+	/*
+	 * handles an HTTP request
+	 */
+	function handleHeader(header) {
+		// get first line of request (all we care about for now)
+		var method = header.substr(0, header.indexOf(" "));
+		
+		if (!method) {
+			return _generateResponse("400 Bad Request");
+		}
+		
+		if (method != "POST") {
+			return _generateResponse("501 Method Not Implemented");
+		}
+		
+		// Parse request URI
+		var matches = header.match("^[A-Z]+ (\/.*) HTTP/1.[01]");
+		if (!matches) {
+			return _generateResponse("400 Bad Request");
+		}
+		
+		var response = _handleRequest(matches[1]);
+		
+		// return OK
+		return _generateResponse("200 OK", 'text/xml; charset="UTF-8"', response);
+	}
+	
+	
+	function _handleRequest(uri) {
+		var s = new Zotero.Search();
+		s.addCondition('noChildren', 'true');
+		var ids = s.search();
+		
+		if (!ids) {
+			ids = [];
+		}
+		
+		var uploadIDs = {
+			updated: {
+				items: ids
+			},
+			/* TODO: fix buildUploadXML to ignore missing */
+			deleted: {}
+		};
+		return Zotero.Sync.Server.Data.buildUploadXML(uploadIDs);
+	}
+	
+	
+	/*
+	 * generates the response to an HTTP request
+	 */
+	function _generateResponse(status, contentType, body) {
+		var response = "HTTP/1.0 "+status+"\r\n";
+		
+		if(body) {
+			if(contentType) {
+				response += "Content-Type: "+contentType+"\r\n";
+			}
+			response += "\r\n"+body;
+		} else {
+			response += "Content-Length: 0\r\n\r\n"
+		}
+		
+		return response;
+	}
+	
+	
+	function _registerOnlineObserver() {
+		if (_onlineObserverRegistered) {
+			return;
+		}
+		
+		// Observer to enable the integration when we go online
+		var observer = {
+			observe: function(subject, topic, data) {
+				if (data == 'online') {
+					Zotero.Integration.init();
+				}
+			}
+		};
+		
+		var observerService =
+			Components.classes["@mozilla.org/observer-service;1"]
+				.getService(Components.interfaces.nsIObserverService);
+		observerService.addObserver(observer, "network:offline-status-changed", false);
+		
+		_onlineObserverRegistered = true;
+	}
+}
+
+
+Zotero.DataServer.SocketListener = new function() {
+	this.onSocketAccepted = onSocketAccepted;
+	
+	/*
+	 * called when a socket is opened
+	 */
+	function onSocketAccepted(socket, transport) {
+		// get an input stream
+		var iStream = transport.openInputStream(0, 0, 0);
+		var oStream = transport.openOutputStream(0, 0, 0);
+		
+		var dataListener = new Zotero.DataServer.DataListener(iStream, oStream);
+		var pump = Components.classes["@mozilla.org/network/input-stream-pump;1"]
+							 .createInstance(Components.interfaces.nsIInputStreamPump);
+		pump.init(iStream, -1, -1, 0, 0, false);
+		pump.asyncRead(dataListener, null);
+	}
+}
+
+/*
+ * handles the actual acquisition of data
+ */
+Zotero.DataServer.DataListener = function(iStream, oStream) {
+	this.header = "";
+	this.headerFinished = false;
+	
+	this.body = "";
+	this.bodyLength = 0;
+	
+	this.iStream = iStream;
+	this.oStream = oStream;
+	this.sStream = Components.classes["@mozilla.org/scriptableinputstream;1"]
+	                         .createInstance(Components.interfaces.nsIScriptableInputStream);
+	this.sStream.init(iStream);
+	
+	this.foundReturn = false;
+}
+
+/*
+ * called when a request begins (although the request should have begun before
+ * the DataListener was generated)
+ */
+Zotero.DataServer.DataListener.prototype.onStartRequest = function(request, context) {}
+
+/*
+ * called when a request stops
+ */
+Zotero.DataServer.DataListener.prototype.onStopRequest = function(request, context, status) {
+	this.iStream.close();
+	this.oStream.close();
+}
+
+/*
+ * called when new data is available
+ */
+Zotero.DataServer.DataListener.prototype.onDataAvailable = function(request, context,
+                                                             inputStream, offset, count) {
+	var readData = this.sStream.read(count);
+	
+	// Read header
+	if (!this.headerFinished) {
+		// see if there's a magic double return
+		var lineBreakIndex = readData.indexOf("\r\n\r\n");
+		if (lineBreakIndex != -1) {
+			if (lineBreakIndex != 0) {
+				this.header += readData.substr(0, lineBreakIndex+4);
+			}
+			
+			this._headerFinished();
+			return;
+		}
+		
+		var lineBreakIndex = readData.indexOf("\n\n");
+		if (lineBreakIndex != -1) {
+			if (lineBreakIndex != 0) {
+				this.header += readData.substr(0, lineBreakIndex+2);
+			}
+			
+			this._headerFinished();
+			return;
+		}
+		
+		if (this.header && this.header[this.header.length-1] == "\n" &&
+				(readData[0] == "\n" || readData[0] == "\r")) {
+			if (readData.length > 1 && readData[1] == "\n") {
+				this.header += readData.substr(0, 2);
+			}
+			else {
+				this.header += readData[0];
+			}
+			
+			this._headerFinished();
+			return;
+		}
+		
+		this.header += readData;
+	}
+}
+
+/*
+ * processes an HTTP header and decides what to do
+ */
+Zotero.DataServer.DataListener.prototype._headerFinished = function() {
+	this.headerFinished = true;
+	var output = Zotero.DataServer.handleHeader(this.header);
+	this._requestFinished(output);
+}
+
+/*
+ * returns HTTP data from a request
+ */
+Zotero.DataServer.DataListener.prototype._requestFinished = function(response) {
+	// close input stream
+	this.iStream.close();
+	
+	// open UTF-8 converter for output stream	
+	var intlStream = Components.classes["@mozilla.org/intl/converter-output-stream;1"]
+							   .createInstance(Components.interfaces.nsIConverterOutputStream);
+	
+	// write
+	try {
+		intlStream.init(this.oStream, "UTF-8", 1024, "?".charCodeAt(0));
+		
+		Zotero.debug('Writing response to stream:\n\n' + response);
+		
+		// write response
+		intlStream.writeString(response);
+	} catch(e) {
+		Zotero.debug("An error occurred.");
+		Zotero.debug(e);
+	} finally {
+		Zotero.debug('Closing stream');
+		intlStream.close();
+	}
+}
+

chrome/content/zotero/xpcom/itemTreeView.js

@@ -47,7 +47,7 @@ Zotero.ItemTreeView = function(itemGroup, sourcesOnly)
 	this._dataItems = [];
 	this.rowCount = 0;
 	
-	this._unregisterID = Zotero.Notifier.registerObserver(this, ['item', 'collection-item']);
+	this._unregisterID = Zotero.Notifier.registerObserver(this, ['item', 'collection-item', 'share-items']);
 }
 
 
@@ -229,6 +229,13 @@ Zotero.ItemTreeView.prototype.refresh = function()
 }
 
 
+Zotero.ItemTreeView.prototype.__defineGetter__('readOnly', function () {
+	if (this._itemGroup.isShare()) {
+		return true;
+	}
+	return false;
+});
+
 /*
  *  Called by Zotero.Notifier on any changes to items in the data layer
  */
@@ -251,7 +258,12 @@ Zotero.ItemTreeView.prototype.notify = function(action, type, ids, extraData)
 	
 	// If refreshing a single item, just unselect and reselect it
 	if (action == 'refresh') {
-		if (savedSelection.length == 1 && savedSelection[0] == ids[0]) {
+		if (type == 'share-items') {
+			if (this._itemGroup.isShare()) {
+				this.refresh();
+			}
+		}
+		else if (savedSelection.length == 1 && savedSelection[0] == ids[0]) {
 			this.selection.clearSelection();
 			this.rememberSelection(savedSelection);
 		}
@@ -259,6 +271,10 @@ Zotero.ItemTreeView.prototype.notify = function(action, type, ids, extraData)
 		return;
 	}
 	
+	if (this._itemGroup.isShare()) {
+		return;
+	}
+	
 	this.selection.selectEventsSuppressed = true;
 	
 	// See if we're in the active window
@@ -1502,7 +1518,22 @@ Zotero.ItemTreeCommandController.prototype.onEvent = function(evt)
  *  Begin a drag
  */
 Zotero.ItemTreeView.prototype.onDragStart = function (evt,transferData,action)
-{ 
+{
+	// Quick implementation of dragging of XML item format
+	if (this.readOnly) {
+		var items = this.getSelectedItems();
+		
+		var xml = <data/>;
+		for (var i=0; i<items.length; i++) {
+			var xmlNode = Zotero.Sync.Server.Data.itemToXML(items[i]);
+			xml.items.item += xmlNode;
+		}
+		Zotero.debug(xml.toXMLString());
+		transferData.data = new TransferData();
+		transferData.data.addDataForFlavour("zotero/item-xml", xml.toXMLString());
+		return;
+	}
+	
 	transferData.data = new TransferData();
 	transferData.data.addDataForFlavour("zotero/item", this.saveSelection());
 	
@@ -1783,6 +1814,7 @@ Zotero.ItemTreeView.prototype.getSupportedFlavours = function ()
 { 
 	var flavors = new FlavourSet();
 	flavors.appendFlavour("zotero/item");
+	flavors.appendFlavour("zotero/item-xml");
 	flavors.appendFlavour("text/x-moz-url");
 	flavors.appendFlavour("application/x-moz-file", "nsIFile");
 	return flavors; 
@@ -1878,8 +1910,7 @@ Zotero.ItemTreeView.prototype.canDrop = function(row, orient)
 	// Highlight the rows correctly on drag
 	
 	var rowItem = this._getItemAtRow(row).ref; //the item we are dragging over
-	if (dataType == 'zotero/item')
-	{
+	if (dataType == 'zotero/item') {
 		// Directly on a row
 		if (orient == 0)
 		{

chrome/content/zotero/xpcom/notifier.js

@@ -24,7 +24,7 @@ Zotero.Notifier = new function(){
 	var _observers = new Zotero.Hash();
 	var _disabled = false;
 	var _types = [
-		'collection', 'creator', 'search', 'item',
+		'collection', 'creator', 'search', 'share', 'share-items', 'item',
 		'collection-item', 'item-tag', 'tag'
 	];
 	var _inTransaction;

chrome/content/zotero/xpcom/sync.js

@@ -1073,7 +1073,6 @@ Zotero.Sync.Server.Data = new function() {
 	
 	default xml namespace = '';
 	
-	
 	function processUpdatedXML(xml, lastLocalSyncDate, uploadIDs) {
 		if (xml.children().length() == 0) {
 			Zotero.debug('No changes received from server');
@@ -1636,11 +1635,11 @@ Zotero.Sync.Server.Data = new function() {
 	 *
 	 * @param	object	xmlItem		E4X XML node with item data
 	 * @param	object	item			(Optional) Existing Zotero.Item to update
-	 * @param	bool		newID		(Optional) Ignore passed itemID and choose new one
+	 * @param	bool	skipPrimary		(Optional) Ignore passed primary fields (except itemTypeID)
 	 */
-	function xmlToItem(xmlItem, item, newID) {
+	function xmlToItem(xmlItem, item, skipPrimary) {
 		if (!item) {
-			if (newID) {
+			if (skipPrimary) {
 				item = new Zotero.Item(null);
 			}
 			else {
@@ -1653,19 +1652,21 @@ Zotero.Sync.Server.Data = new function() {
 				*/
 			}
 		}
-		else if (newID) {
-			_error("Cannot use new id with existing item in "
+		else if (skipPrimary) {
+			_error("Cannot use skipPrimary with existing item in "
 					+ "Zotero.Sync.Server.Data.xmlToItem()");
 		}
 		
 		// TODO: add custom item types
 		
 		var data = {
-			itemTypeID: Zotero.ItemTypes.getID(xmlItem.@itemType.toString()),
-			dateAdded: xmlItem.@dateAdded.toString(),
-			dateModified: xmlItem.@dateModified.toString(),
-			key: xmlItem.@key.toString()
+			itemTypeID: Zotero.ItemTypes.getID(xmlItem.@itemType.toString())
 		};
+		if (!skipPrimary) {
+			data.dateAdded = xmlItem.@dateAdded.toString();
+			data.dateModified = xmlItem.@dateModified.toString();
+			data.key = xmlItem.@key.toString();
+		}
 		
 		var changedFields = {};
 		
@@ -1780,11 +1781,11 @@ Zotero.Sync.Server.Data = new function() {
 	 *
 	 * @param	object	xmlCollection	E4X XML node with collection data
 	 * @param	object	item		(Optional) Existing Zotero.Collection to update
-	 * @param	bool	newID		(Optional) Ignore passed collectionID and choose new one
+	 * @param	bool	skipPrimary		(Optional) Ignore passed primary fields (except itemTypeID)
 	 */
-	function xmlToCollection(xmlCollection, collection, newID) {
+	function xmlToCollection(xmlCollection, collection, skipPrimary) {
 		if (!collection) {
-			if (newID) {
+			if (skipPrimary) {
 				collection = new Zotero.Collection(null);
 			}
 			else {
@@ -1797,16 +1798,19 @@ Zotero.Sync.Server.Data = new function() {
 				*/
 			}
 		}
-		else if (newID) {
-			_error("Cannot use new id with existing collection in "
+		else if (skipPrimary) {
+			_error("Cannot use skipPrimary with existing collection in "
 					+ "Zotero.Sync.Server.Data.xmlToCollection()");
 		}
 		
 		collection.name = xmlCollection.@name.toString();
-		collection.parent = xmlCollection.@parent.toString() ?
-			parseInt(xmlCollection.@parent) : false;
-		collection.dateModified = xmlCollection.@dateModified.toString();
-		collection.key = xmlCollection.@key.toString();
+		if (!skipPrimary) {
+			collection.parent = xmlCollection.@parent.toString() ?
+				parseInt(xmlCollection.@parent) : false;
+			collection.dateAdded = xmlCollection.@dateAdded.toString();
+			collection.dateModified = xmlCollection.@dateModified.toString();
+			collection.key = xmlCollection.@key.toString();
+		}
 		
 		// Subcollections
 		var str = xmlCollection.collections.toString();
@@ -1855,11 +1859,11 @@ Zotero.Sync.Server.Data = new function() {
 	 *
 	 * @param	object	xmlCreator	E4X XML node with creator data
 	 * @param	object	item		(Optional) Existing Zotero.Creator to update
-	 * @param	bool	newID		(Optional) Ignore passed creatorID and choose new one
+	 * @param	bool	skipPrimary	(Optional) Ignore passed primary fields (except itemTypeID)
 	 */
-	function xmlToCreator(xmlCreator, creator, newID) {
+	function xmlToCreator(xmlCreator, creator, skipPrimary) {
 		if (!creator) {
-			if (newID) {
+			if (skipPrimary) {
 				creator = new Zotero.Creator(null);
 			}
 			else {
@@ -1872,16 +1876,19 @@ Zotero.Sync.Server.Data = new function() {
 				*/
 			}
 		}
-		else if (newID) {
-			_error("Cannot use new id with existing creator in "
+		else if (skipPrimary) {
+			_error("Cannot use skipPrimary with existing creator in "
 					+ "Zotero.Sync.Server.Data.xmlToCreator()");
 		}
 		
 		var data = {
-			dateModified: xmlCreator.@dateModified.toString(),
-			key: xmlCreator.@key.toString(),
 			birthYear: xmlCreator.birthYear.toString()
 		};
+		if (!skipPrimary) {
+			data.dateAdded = xmlCreator.@dateAdded.toString();
+			data.dateModified = xmlCreator.@dateModified.toString();
+			data.key = xmlCreator.@key.toString();
+		}
 		
 		if (xmlCreator.fieldMode == 1) {
 			data.firstName = '';
@@ -1935,11 +1942,11 @@ Zotero.Sync.Server.Data = new function() {
 	 *
 	 * @param	object	xmlSearch	E4X XML node with search data
 	 * @param	object	item		(Optional) Existing Zotero.Search to update
-	 * @param	bool	newID		(Optional) Ignore passed searchID and choose new one
+	 * @param	bool	skipPrimary		(Optional) Ignore passed primary fields (except itemTypeID)
 	 */
-	function xmlToSearch(xmlSearch, search, newID) {
+	function xmlToSearch(xmlSearch, search, skipPrimary) {
 		if (!search) {
-			if (newID) {
+			if (skipPrimary) {
 				search = new Zotero.Search(null);
 			}
 			else {
@@ -1952,14 +1959,17 @@ Zotero.Sync.Server.Data = new function() {
 				*/
 			}
 		}
-		else if (newID) {
+		else if (skipPrimary) {
 			_error("Cannot use new id with existing search in "
 					+ "Zotero.Sync.Server.Data.xmlToSearch()");
 		}
 		
 		search.name = xmlSearch.@name.toString();
-		search.dateModified = xmlSearch.@dateModified.toString();
-		search.key = xmlSearch.@key.toString();
+		if (!skipPrimary) {
+			search.dateAdded = xmlSearch.@dateAdded.toString();
+			search.dateModified = xmlSearch.@dateModified.toString();
+			search.key = xmlSearch.@key.toString();
+		}
 		
 		var conditionID = -1;
 		

chrome/content/zotero/xpcom/zeroconf.js

@@ -0,0 +1,348 @@
+Zotero.Zeroconf = new function () {
+	this.init = init;
+	this.registerService = registerService;
+	this.findInstances = findInstances;
+	this.findInstancesCallback = findInstancesCallback;
+	this.unregisterService = unregisterService;
+	this.getScript = getScript;
+	
+	this.clientEnabled = true;
+	this.serverEnabled = true;
+	
+	this.__defineGetter__('clientPath', function () {
+		return '/usr/bin/dns-sd';
+	});
+	
+	this.__defineGetter__('displayName', function () {
+		var dnsService = Components.classes["@mozilla.org/network/dns-service;1"].
+			getService(Components.interfaces.nsIDNSService);
+		var hostname = dnsService.myHostName;
+		
+		return hostname;
+	});
+	
+	this.__defineGetter__('port', function () {
+		return Zotero.DataServer.port;
+	});
+	
+	this.__defineGetter__('instances', function () {
+		var instances = {};
+		for (var instance in _instances) {
+			instances[instance] = new Zotero.Zeroconf.RemoteLibrary(instance);
+		}
+		return instances;
+	});
+	
+	var _instances = [];
+	var _browseCacheFile = '/tmp/zoteroconf_instances';
+	var scriptsLoaded = false;
+	
+	function init() {
+		if (!Zotero.Prefs.get("zeroconf.server.enabled")) {
+			this.clientEnabled = false;
+			this.serverEnabled = false;
+		}
+		
+		// OS X only, for now
+		if (!Zotero.isMac) {
+			this.clientEnabled = false;
+			this.serverEnabled = false;
+		}
+		
+		// Make sure we have the client executable
+		var file = Components.classes["@mozilla.org/file/local;1"].
+				createInstance(Components.interfaces.nsILocalFile);
+		file.initWithPath(this.clientPath);
+		
+		if (!file.exists()) {
+			Zotero.debug('Not enabling Z(ot)eroconf -- executable not found');
+			this.clientEnabled = false;
+			this.serverEnabled = false;
+			return;
+		}
+		
+		if (!this.serverEnabled) {
+			Zotero.debug('Not enabling Z(ot)eroconf');
+			return;
+		}
+		
+		var registered = this.registerService();
+		if (!registered) {
+			return;
+		}
+		
+		var observerService = Components.classes["@mozilla.org/observer-service;1"]
+			.getService(Components.interfaces.nsIObserverService);
+		observerService.addObserver({
+			observe: function(subject, topic, data) {
+				Zotero.Zeroconf.unregisterService();
+			}
+		}, "quit-application", false);
+	}
+	
+	
+	function registerService() {
+		var file = Components.classes["@mozilla.org/file/local;1"].
+				createInstance(Components.interfaces.nsILocalFile);
+		file.initWithPath(this.clientPath);
+		
+		var process = Components.classes["@mozilla.org/process/util;1"].
+				createInstance(Components.interfaces.nsIProcess);
+		process.init(file);
+		
+		var args = ["-R", this.displayName, "_zotero._tcp", "local.", this.port];
+		
+		Zotero.debug("Registering Z(ot)eroconf on port " + this.port);
+		process.run(false, args, args.length);
+		
+		return true;
+	}
+	
+	
+	function findInstances(callback) {
+		if (!this.clientEnabled) {
+			return;
+		}
+		
+		Zotero.debug("Browsing for Z(ot)eroconf instances");
+		var file = this.getScript('find_instances');
+		
+		var process = Components.classes["@mozilla.org/process/util;1"].
+				createInstance(Components.interfaces.nsIProcess);
+		process.init(file);
+		var args = ['find_instances'];
+		process.run(false, args, args.length);
+		
+		// Wait half a second for browse before proceeding
+		setTimeout(function () {
+			Zotero.Zeroconf.findInstancesCallback(callback);
+		}, 500);
+	}
+	
+	
+	function findInstancesCallback(callback) {
+		var file = Zotero.Zeroconf.getScript('kill_find_instances');
+		
+		var process = Components.classes["@mozilla.org/process/util;1"].
+				createInstance(Components.interfaces.nsIProcess);
+		process.init(file);
+		var args = ['kill_find_instances'];
+		process.run(false, args, args.length);
+		
+		var file = Components.classes["@mozilla.org/file/local;1"].
+				createInstance(Components.interfaces.nsILocalFile);
+		file.initWithPath(_browseCacheFile);
+		
+		if (!file.exists()) {
+			Zotero.debug(_browseCacheFile + " doesn't exist", 2);
+			_instances = {};
+			return;
+		}
+		
+		var browseCache = Zotero.File.getContents(file);
+		Zotero.debug(browseCache);
+		file.remove(null);
+		
+		// Parse browse output
+		var lines = browseCache.split(/\n/);
+		var newInstances = {};
+		for each(var line in lines) {
+			var matches = line.match(/([a-zA-Z\.]+) +_zotero\._tcp\. +(.+)/);
+			if (matches) {
+				var domain = matches[1];
+				var name = matches[2];
+				// Skip local host
+				if (name == this.displayName) {
+					continue;
+				}
+				newInstances[name] = true;
+			}
+		}
+		
+		// Remove expired instances
+		for (var instance in _instances) {
+			if (!newInstances[instance]) {
+				delete _instances[instance];
+			}
+		}
+		
+		// Add new instances
+		for (var instance in newInstances) {
+			_instances[instance] = true;
+		}
+		
+		Zotero.Notifier.trigger('refresh', 'share', 'all');
+		
+		if (callback) {
+			callback();
+		}
+	}
+	
+	
+	function unregisterService() {
+		Zotero.debug("Unregistering Zeroconf service");
+		var file = Zotero.Zeroconf.getScript('kill_service');
+		
+		var process = Components.classes["@mozilla.org/process/util;1"].
+				createInstance(Components.interfaces.nsIProcess);
+		process.init(file);
+		var args = ['kill_service'];
+		var ret = process.run(false, args, args.length);
+		
+		if (ret != 0) {
+			Zotero.debug("Zeroconf client not stopped!", 2);
+		}
+		
+		// Remove any zoteroconf files remaining in tmp directory
+		var file = Components.classes["@mozilla.org/file/local;1"].
+				createInstance(Components.interfaces.nsILocalFile);
+		file.initWithPath('/tmp');
+		if (!file.exists() || !file.isDirectory()) {
+			return;
+		}
+		try {
+			var files = file.directoryEntries;
+			while (files.hasMoreElements()) {
+				var tmpFile = files.getNext();
+				tmpFile.QueryInterface(Components.interfaces.nsILocalFile);
+				if (tmpFile.leafName.indexOf('zoteroconf') != -1) {
+					tmpFile.remove(null);
+				}
+			}
+		}
+		catch (e) {
+			Zotero.debug(e);
+		}
+	}
+	
+	
+	function getScript() {
+		var file = Components.classes["@mozilla.org/extensions/manager;1"]
+					.getService(Components.interfaces.nsIExtensionManager)
+					.getInstallLocation(ZOTERO_CONFIG['GUID'])
+					.getItemLocation(ZOTERO_CONFIG['GUID']);
+		file.append('scripts');
+		file.append('zoteroconf.sh');
+		
+		// The first time we load the script, do some checks
+		if (!scriptsLoaded) {
+			if (!file.exists()) {
+				throw ('zoteroconf.sh not found in Zotero.Zeroconf.getScript()');
+			}
+			
+			// Make sure the file is executable
+			if (file.permissions != 33261) {
+				try {
+					file.permissions = 33261;
+				}
+				catch (e) {
+					throw ('Cannot make zoteroconf.sh executable in Zotero.Zeroconf.getScript()');
+				}
+			}
+		}
+		
+		return file;
+	}
+}
+
+
+
+Zotero.Zeroconf.RemoteLibrary = function (name) {
+	default xml namespace = '';
+	
+	this.name = name;
+	
+	this._host;
+	this._port;
+	this._items = [];
+	this._tmpFile = '/tmp/zoteroconf_info_' + Zotero.randomString(6);
+	//this.search = new Zotero.Zeroconf.RemoteLibrary.Search(this);
+}
+
+Zotero.Zeroconf.RemoteLibrary.prototype.load = function () {
+	Zotero.debug("Getting service info for " + this.name);
+	
+	var file = Zotero.Zeroconf.getScript('get_info');
+	
+	var process = Components.classes["@mozilla.org/process/util;1"].
+			createInstance(Components.interfaces.nsIProcess);
+	process.init(file);
+	var args = ['get_info', this.name, this._tmpFile];
+	process.run(false, args, args.length);
+	
+	var self = this;
+	
+	setTimeout(function () {
+		var file = Zotero.Zeroconf.getScript('kill_get_info');
+		
+		var process = Components.classes["@mozilla.org/process/util;1"].
+				createInstance(Components.interfaces.nsIProcess);
+		process.init(file);
+		var args = ['kill_get_info'];
+		process.run(false, args, args.length);
+		
+		var file = Components.classes["@mozilla.org/file/local;1"].
+				createInstance(Components.interfaces.nsILocalFile);
+		file.initWithPath(self._tmpFile);
+		
+		var infoCache = Zotero.File.getContents(file);
+		Zotero.debug(infoCache);
+		file.remove(null);
+		
+		var lines = infoCache.split(/\n/);
+		for each(var line in lines) {
+			var matches = line.match(/can be reached at +([^ ]+) *:([0-9]+)/);
+			if (matches) {
+				self._host = matches[1];
+				self._port = matches[2];
+				break;
+			}
+		}
+		
+		if (self._host) {
+			self.loadItems(self);
+		}
+	}, 250);
+}
+
+Zotero.Zeroconf.RemoteLibrary.prototype.loadItems = function (self, noNotify) {
+	var url = "http://" + this._host + ':' + this._port;
+	Zotero.Utilities.HTTP.doPost(url, '', function (xmlhttp) {
+		Zotero.debug(xmlhttp.responseText);
+		
+		self._items = [];
+		var xml = new XML(xmlhttp.responseText);
+		for each(var xmlNode in xml.items.item) {
+			var obj = Zotero.Sync.Server.Data.xmlToItem(xmlNode, false, true);
+			self._items.push(obj);
+		}
+		
+		Zotero.debug("Retrieved " + self._items.length +
+				" item" + (self._items.length == 1 ? '' : 's'));
+		
+		if (!noNotify) {
+			Zotero.Notifier.trigger('refresh', 'share-items', 'all');
+		}
+	});
+}
+
+Zotero.Zeroconf.RemoteLibrary.prototype.getAll = function () {
+	if (!this._host) {
+		this.load();
+		return [];
+	}
+	
+	this.loadItems(this, true);
+	
+	return this._items;
+}
+
+/*
+Zotero.Zeroconf.RemoteLibrary.Search = function (library) {
+	this.library = library;
+}
+
+Zotero.Zeroconf.RemoteLibrary.Search.prototype = function () {
+	
+}
+*/

chrome/content/zotero/xpcom/zotero.js

@@ -253,6 +253,10 @@ var Zotero = new function(){
 		Zotero.Integration.SOAP.init();
 		Zotero.Integration.init();
 		
+		// Initialize data web server
+		Zotero.DataServer.init();
+		Zotero.Zeroconf.init();
+		
 		Zotero.Sync.init();
 		
 		this.initialized = true;

components/zotero-service.js

@@ -16,11 +16,11 @@ var ZoteroWrapped = this;
 
 var xpcomFiles = [ 'zotero',
 	'annotate', 'attachments', 'cite', 'cite_compat', 'collectionTreeView',
-	'data_access', 'data/item', 'data/items', 'data/collection', 'data/collections',
+	'dataServer', 'data_access', 'data/item', 'data/items', 'data/collection', 'data/collections',
 	'data/cachedTypes', 'data/creator', 'data/creators', 'data/itemFields',
 	'data/notes', 'data/tags', 'db', 'file', 'fulltext', 'id', 'ingester', 'integration',
 	'itemTreeView', 'mime', 'notifier',  'progressWindow', 'quickCopy', 'report',
-	'schema', 'search', 'sync', 'timeline', 'translate', 'utilities'];
+	'schema', 'search', 'sync', 'timeline', 'translate', 'utilities', 'zeroconf'];
 
 for (var i=0; i<xpcomFiles.length; i++) {
 	Cc["@mozilla.org/moz/jssubscript-loader;1"]

defaults/preferences/zotero.js

@@ -68,6 +68,9 @@ pref("extensions.zotero.export.quickCopy.setting", 'bibliography=http://www.zote
 // Integration settings
 pref("extensions.zotero.integration.autoRegenerate", -1);	// -1 = ask; 0 = no; 1 = yes
 
+// Zeroconf
+pref("extensions.zotero.zeroconf.server.enabled", false);
+
 // Annotation settings
 pref("extensions.zotero.annotations.warnOnClose", true);
 

scripts/zoteroconf.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+if [ ! "$1" ]; then
+	echo "Action not specified"
+	exit 1
+fi
+
+if [ $1 = "find_instances" ]; then
+	dns-sd -B _zotero._tcp local. > /tmp/zoteroconf_instances &
+
+elif [ $1 = "kill_find_instances" ]; then
+	PIDs=`ps x | grep "dns-sd -B" | grep _zotero._tcp | sed -E 's/ *([0-9]+).*/\1/' | xargs`
+	if [ "$PIDs" ]; then
+		kill $PIDs
+	fi
+
+elif [ $1 = "get_info" ]; then
+	if [ ! "$2" ]; then
+		echo "Service name not specified"
+		exit 1
+	fi
+	
+	if [ ! "$3" ]; then
+		echo "Temp file path not specified"
+		exit 1
+	fi
+	
+	#dns-sd -L "$2" _zotero._tcp local. > $3 &
+	mDNS -L "$2" _zotero._tcp local. > $3 &
+
+elif [ $1 = "kill_get_info" ]; then
+	#PIDs=`ps x | grep "dns-sd -L" | grep _zotero._tcp | sed -E 's/ *([0-9]+).*/\1/' | xargs`
+	PIDs=`ps x | grep "mDNS -L" | grep _zotero._tcp | sed -E 's/ *([0-9]+).*/\1/' | xargs`
+	if [ "$PIDs" ]; then
+		kill $PIDs
+	fi
+
+elif [ $1 = "kill_service" ]; then
+	PIDs=`ps x | grep dns-sd | grep '_zotero._tcp' | sed -E 's/ *([0-9]+).*/\1/' | xargs`
+	if [ "$PIDs" ]; then
+		kill $PIDs
+	fi
+fi