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https://github.com/EGroupware/egroupware.git
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384 lines
13 KiB
JavaScript
384 lines
13 KiB
JavaScript
/*
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Copyright (c) 2003-2004 Jan-Klaas Kollhof
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This file is part of the JavaScript o lait library(jsolait).
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jsolait is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This software 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this software; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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Provides an JSON-RPC imlementation.
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*/
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Module("jsonrpc", "0.3.2", function(mod){
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var lang = importModule("lang");
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var tokens = lang.tokens;
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var ObjectBuffer=Class("ObjectBuffer", function(publ, supr){
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publ.init=function(){
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this.data="";
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}
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publ.getObjects=function(data){
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this.data += data;
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var t = new lang.Tokenizer(this.data);
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var brCnt= 0;
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var objects = [];
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var readCnt = 0
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while(! t.finished()){
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var n = t.next();
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if(n.type != tokens.ERR){
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if(n.value == "{"){
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brCnt+=1;
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}else if(n.value == "}"){
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brCnt-=1;
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if(brCnt==0){
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var s = this.data.slice(readCnt, n.pos+1);
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readCnt += s.length;
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objects.push(s);
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}
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}
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}else{
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break;
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}
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}
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this.data = this.data.slice(readCnt);
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return objects;
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}
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})
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var nameAllowed=function(name){
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return name.match(/^[a-zA-Z]\w*$/) != null;
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}
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var getMethodByName=function(obj, name){
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try{//to get a method by asking the service
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obj = obj._getMethodByName(name)
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}catch(e){
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var names = name.split(".");
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for(var i=0;i<names.length;i++){
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name = names[i];
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if(nameAllowed(name)){
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obj = obj[name];
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}
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}
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}
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return obj;
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}
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var Response=Class("Response", function(publ, supr){
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publ.init=function(id, result, error){
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this.id=id;
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this.result = result;
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this.error = error;
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}
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publ._toJSON=function(){
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var p = [lang.objToJson(this.id), lang.objToJson(this.result),lang.objToJson(this.error)];
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return '{"id":' + p[0] + ', "result":' + p[1] + ', "error":' + p[2] + "}";
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}
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})
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var Request=Class("Request", function(publ, supr){
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publ.init=function(id, method, params){
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this.id=id;
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this.method = method;
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this.params = params;
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}
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publ._toJSON=function(){
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var p = [lang.objToJson(this.id), lang.objToJson(this.method),lang.objToJson(this.params)];
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return '{"id":' + p[0] + ', "method":' + p[1] + ', "params":' + p[2] + "}";
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}
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})
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var Notification=Class("Notification", function(publ, supr){
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publ.init=function(method, params){
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this.method = method;
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this.params = params;
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}
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publ._toJSON=function(){
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var p = [lang.objToJson(this.method),lang.objToJson(this.params)];
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return '{"method":' + p[0] + ', "params":' + p[1] + "}";
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}
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})
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var ResponseHandler=Class("ResponseHandler", function(publ, supr){
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publ.init=function(callback){
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this.callback=callback;
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}
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publ.handleResponse=function(resp){
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this.callback(resp.result, resp.error);
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}
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})
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var RPCLib = Class("RPCLib", function(publ, supr){
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})
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var BaseConnectionHandler = Class("BaseConnectionHandler", function(publ, supr){
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publ.init=function(service){
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this.service = service;
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this.jsonParser = new lang.JSONParser();
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this.jsonParser.addLib(new RPCLib(), "rpc", []);
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this.respHandlers = [];
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this.objBuffer = new ObjectBuffer();
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}
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publ.addResponseHandler=function(cb){
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var id=1;
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while(this.respHandlers[""+id] ){
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id+=1;
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}
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id="" + id;
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this.respHandlers[id] = new ResponseHandler(cb);
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return id;
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}
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publ.send = function(data){
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}
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publ.sendNotify = function(name, args){
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var n = new Notification(name, args);
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n = this.jsonParser.objToJson(n);
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this.send(n)
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}
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publ.sendRequest = function(name, args, callback){
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var id = this.addResponseHandler(callback);
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var r = new Request(id, name, args);
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r = this.jsonParser.objToJson(r);
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this.send(r);
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}
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publ.sendResponse = function(id, result, error){
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var r = new Response(id, result, error);
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r = this.jsonParser.objToJson(r);
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this.send(r);
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}
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publ.handleRequest = function(req){
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var name = req.method;
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var params = req.params;
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var id=req.id;
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if(this.service[name]){
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try{
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var rslt = this.service[name].apply(this.service,params);
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this.sendResponse(id, rslt, null)
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}catch(e){
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this.sendResponse(id, null, new ApplicationError("" + e))
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}
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}else{
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this.sendResponse(id, null, new MethodNotFound());
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}
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}
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publ.handleNotification = function(notif){
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if(this.service[notif.method]){
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try{
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this.service[notif.method].apply(this.service, notif.params);
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}catch(e){
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}
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}
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}
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publ.handleResponse = function(resp){
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var id=resp.id;
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var h = this.respHandlers[id];
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h.handleResponse(resp)
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delete this.respHandlers[id]
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}
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publ.handleData = function(data){
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var objs = this.objBuffer.getObjects(data);
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for(var i=0;i<objs.length;i++){
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try{
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var obj = this.jsonParser.jsonToObj(objs[i]);
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}catch(e){
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throw "Not well formed";
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}
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if(obj.method != null){
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if(obj.id != null){
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this.handleRequest(new Request(obj.id, obj.method, obj.params));
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}else{
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this.handleNotification(new Notification(obj.method, obj.params));
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}
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}else if(obj.id != null){
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this.handleResponse(new Response(obj.id, obj.result, obj.error));
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}else{
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throw "Unknown Data";
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}
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}
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}
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})
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var SocketConnectionHandler = Class("SocketConnectionHandler", BaseConnectionHandler, function(publ, supr){
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publ.init=function(socket, localService){
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this.socket = socket;
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socket.addEventListener("connectionData", this, false);
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supr(this).init( localService);
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}
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publ.handleEvent=function(evt){
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this.handleData(evt.data);
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}
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publ.send=function(data){
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this.socket.send(data);
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}
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publ.close=function(data){
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this.socket.close();
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}
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})
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var HTTPConnectionHandler = Class("HTTPConnectionHandler", BaseConnectionHandler, function(publ, supr){
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var urllib;
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publ.init=function(url, localService){
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urllib=importModule("urllib");
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this.url = url;
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supr(this).init( localService);
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}
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publ.handleData = function(data){
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try{
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var obj = this.jsonParser.jsonToObj(data);
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}catch(e){
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throw "Not well formed";
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}
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if(obj.id != null){
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return obj;
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}else{
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throw "Unknown Data (No id property found)";
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}
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}
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publ.sendRequest = function(name, args, callback){
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var sync = false;
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if(typeof callback != "function"){//see if it is sync
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args.push(callback);
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sync=true;
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}
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var data = new Request("httpReq", name, args);
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data = this.jsonParser.objToJson(data);
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if(sync){
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var rsp = urllib.postURL(this.url, data, [["Content-Type", "text/plain"]]);
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rsp = this.handleData(rsp.responseText);
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if(rsp.error){
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throw rsp.error;
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}else{
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return rsp.result;
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}
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}else{//async connection uses the respHandler to handle the repsonse
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var self = this;
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urllib.postURL(this.url, data, [["Content-Type", "text/plain"]], function(rsp){
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try{
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rsp = self.handleData(rsp.responseText);
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}catch(e){
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callback(null,e);
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return;
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}
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callback(rsp.result, rsp.error);
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});
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}
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}
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publ.sendNotify = function(name, args){
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var data = new Notification(name, args);
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data = this.jsonParser.objToJson(data);
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urllib.postURL(this.url, data, [["Content-Type", "text/plain"]], function(rsp){});
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}
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})
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var PeerObject=Class("PeerObject", function(publ, supr){
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publ.init=function(name, conn){
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var fn=function(){
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var args=[];
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for(var i=0;i<arguments.length;i++){
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args[i] = arguments[i];
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}
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var cb=args.pop();
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return conn.sendRequest(name, args, cb);
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}
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return fn;
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}
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})
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var PeerNotifyObject=Class("PeerNotifyObject", function(publ, supr){
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publ.init=function(name, conn){
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var fn=function(){
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var args=[];
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for(var i=0;i<arguments.length;i++){
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args[i] = arguments[i];
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}
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conn.sendNotify(name, args);
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}
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return fn;
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}
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})
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var BasePeer = Class("BasePeer", function(publ, supr){
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publ.init=function(conn, methodNames){
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this._conn = conn;
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this.notify = new PeerObject("notify", conn);
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this._add(methodNames);
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}
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var setupPeerMethod=function(root, methodName, conn, MethClass){
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var names = methodName.split(".");
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var obj = root;
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for(var n=0;n<names.length-1;n++){
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var name = names[n];
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if(obj[name]){
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obj = obj[name];
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}else{
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obj[name] = new Object();
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obj = obj[name];
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}
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}
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var name = names[names.length-1];
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if(obj[name]){
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}else{
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var mth = new MethClass(methodName, conn);
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obj[name] = mth;
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}
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}
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publ._add = function(methodNames){
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for(var i=0;i<methodNames.length;i++){
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setupPeerMethod(this, methodNames[i], this._conn, PeerObject);
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setupPeerMethod(this.notify, methodNames[i], this._conn, PeerNotifyObject);
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}
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}
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})
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mod.ServiceProxy = Class("ServiceProxy", BasePeer, function(publ, supr){
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publ.init = function(url, methodNames, localService){
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var n = url.match(/^jsonrpc:\/\/(.*:\d*)$/);
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if(n!=null){//is it json-rpc over TCP protocoll
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var hostaddr = n[1];
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try{
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var socket = createConnection();
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}catch(e){
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throw "Can't create a socket connection."
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}
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socket.connect(hostaddr);
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supr(this).init( new SocketConnectionHandler(socket, localService), methodNames);
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}else{//or is it json-rpc over http
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supr(this).init( new HTTPConnectionHandler(url, localService), methodNames);
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}
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}
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})
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})
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