dl/lib/opal/OpalLoader.js

DreamLab Libs

var OpalResponse = require('./OpalResponse.js').OpalResponse;
var Event = require("core").event.Event;
var ErrorEvent = require("core").event.ErrorEvent;
var Class = require("core").Class;
var Loader = require("core").http.Loader;
var Response = require("core").http.Response;
var JsonRpcResponse = require("core").jsonrpc.JsonRpcResponse;
var JsonRpcBatchResponse = require("core").jsonrpc.JsonRpcBatchResponse;

/**
 * @class OpalLoader
 * @extends EventDispatcher
 * @requires Class
 * @requires OpalRequest
 * @requires Event
 * @requires ErrorEvent
 * @requires EventDispatcher
 * @requires http
 *
 * @param {OpalRequest} request
 */
var OpalLoader = function(){

    /** @ignore */
    this.Extends = Loader;
    
    this.initialize = function(request){
        this.parent(request);
    };

    this._createResponse = function(data) {
        var result = [];
        if (Array.isArray(data)) {
            result = new JsonRpcBatchResponse(data);
        }
        else {
            result = new JsonRpcResponse(data);
        }
        return result;
    };
    this._parseResponse = function(response){
        var isJson = response.headers.hasOwnProperty('content-type') && response.headers['content-type'].indexOf('application/json') !== -1, data, body;

        if(isJson){
            var json = this._buffer.toString();

            try {
                body = this._createResponse(JSON.parse(json));

            } catch(err) {
                this.dispatchEvent(new ErrorEvent(Loader.Event.ERROR, {json: json, error: (err.message || err)}, -4, 'JSON parse error'));
                return false;
            }
        }else if(response.statusCode!=200){
            this.dispatchEvent(new ErrorEvent(Loader.Event.ERROR, {statusCode: response.statusCode}, -5, 'opal error, status code != 200 -> '+ response.statusCode));
            return false;
        }else{
            body = new Response(this._buffer);
        }
        
        data = new OpalResponse({
            "statusCode": response.statusCode,
            "headers": response.headers,
            "httpVersion": response.httpVersion,
            "body": body
        });

        if(isJson){
            this.dispatchEvent(new Event(OpalLoader.Event.JSON_RESPONSE, data));
        }else{
            this.dispatchEvent(new Event(OpalLoader.Event.HTTP_RESPONSE, data));
        }

        //zwracamy "blad" aby Loader oszukac dispatch Loader.Event.LOADED
        return false;
    };
};

OpalLoader = new Class(new OpalLoader());

OpalLoader.Event = {};
OpalLoader.Event.JSON_RESPONSE = 'OpalLoader_JSON_RESPONSE';
OpalLoader.Event.HTTP_RESPONSE = 'OpalLoader_HTTP_RESPONSE';

exports.OpalLoader = OpalLoader;