lib/dojo/rpc/JsonService.js

   1 /*
   2         Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
   3         Available via Academic Free License >= 2.1 OR the modified BSD license.
   4         see: http://dojotoolkit.org/license for details
   5 */
   6
   7
   8 if(!dojo._hasResource["dojo.rpc.JsonService"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
   9 dojo._hasResource["dojo.rpc.JsonService"] = true;
  10 dojo.provide("dojo.rpc.JsonService");
  11 dojo.require("dojo.rpc.RpcService");
  12
  13 dojo.declare("dojo.rpc.JsonService", dojo.rpc.RpcService, {
  14                 bustCache: false,
  15                 contentType: "application/json-rpc",
  16                 lastSubmissionId: 0,
  17
  18                 callRemote: function(method, params){
  19                         // summary:
  20                         //              call an arbitrary remote method without requiring it to be
  21                         //              predefined with SMD
  22                         //      method: string
  23                         //              the name of the remote method you want to call.
  24                         //      params: array
  25                         //              array of parameters to pass to method
  26
  27                         var deferred = new dojo.Deferred();
  28                         this.bind(method, params, deferred);
  29                         return deferred;
  30                 },
  31
  32                 bind: function(method, parameters, deferredRequestHandler, url){
  33                         //summary:
  34                         //              JSON-RPC bind method. Takes remote method, parameters,
  35                         //              deferred, and a url, calls createRequest to make a JSON-RPC
  36                         //              envelope and passes that off with bind.
  37                         //      method: string
  38                         //              The name of the method we are calling
  39                         //      parameters: array
  40                         //              The parameters we are passing off to the method
  41                         //      deferredRequestHandler: deferred
  42                         //              The Deferred object for this particular request
  43
  44                         var def = dojo.rawXhrPost({
  45                                 url: url||this.serviceUrl,
  46                                 postData: this.createRequest(method, parameters),
  47                                 contentType: this.contentType,
  48                                 timeout: this.timeout,
  49                                 handleAs: "json-comment-optional"
  50                         });
  51                         def.addCallbacks(this.resultCallback(deferredRequestHandler), this.errorCallback(deferredRequestHandler));
  52                 },
  53
  54                 createRequest: function(method, params){
  55                         // summary:
  56                         //      create a JSON-RPC envelope for the request
  57                         //      method: string
  58                         //              The name of the method we are creating the requst for
  59                         //      params: array
  60                         //              The array of parameters for this request;
  61
  62                         var req = { "params": params, "method": method, "id": ++this.lastSubmissionId };
  63                         var data = dojo.toJson(req);
  64                         return data;
  65                 },
  66
  67                 parseResults: function(/*anything*/obj){
  68                         //summary:
  69                         //              parse the result envelope and pass the results back to
  70                         //              the callback function
  71                         //      obj: Object
  72                         //              Object containing envelope of data we recieve from the server
  73
  74                         if(dojo.isObject(obj)){
  75                                 if("result" in obj){
  76                                         return obj.result;
  77                                 }
  78                                 if("Result" in obj){
  79                                         return obj.Result;
  80                                 }
  81                                 if("ResultSet" in obj){
  82                                         return obj.ResultSet;
  83                                 }
  84                         }
  85                         return obj;
  86                 }
  87         }
  88 );
  89
  90 }