dl/lib/opal/OpalServerRequestProcessor.js

DreamLab Libs

/**
 * @overview OpalServerRequestProcessor
 * @copyright Dreamlab Onet.pl sp. z. o o 2012
 */

var core = require('core'),
    JsonRpcRequestProcessor = core.jsonrpc.JsonRpcRequestProcessor,
    Types = core.common.Types,
    BinaryData = core.data.BinaryData,
    Request = core.http.Request,
    JsonRpcRequest = core.jsonrpc.JsonRpcRequest,
    qs = require('qs');

/**
 * @class OpalServerRequestProcessor
 * @classdesc OpalServerRequestProcessor
 * @extends JsonRpcRequestProcessor
 *
 * @requires JsonRpcRequestProcessor
 * @requires Types
 * @requires BinaryData
 *
 * @param {Server} server
 * @returns {OpalServerRequestProcessor}
 */
var OpalServerRequestProcessor = function (server) {
    JsonRpcRequestProcessor.call(this, server);

    this._callback = null;
};

OpalServerRequestProcessor.prototype = Object.create(JsonRpcRequestProcessor.prototype);

/**
 * Retrieves jsonrpc request from request body or uri
 * @returns {JsonRpcRequest}
 * @method
 * @private
 */
OpalServerRequestProcessor.prototype._getRequest = function () {
    var req;

    switch (this._request.getMethod()) {
        case Request.GET:
            //opalowy healthcheck GETem
            if (this._request.getPath().toLowerCase() == "/healthcheck") {
                req = new JsonRpcRequest({
                    id: "healthcheck",
                    method: "_healthcheck"
                });
                break;
            }

            var params = (decodeURI(this._request.getQueryString())).substring(1),
                body;

            if (!params) {
                throw new Error("Empty request");
            }

            body = qs.parse(params);

            this._callback = body.callback;

            if (!body.hasOwnProperty('body')) {
                throw new Error("Wrong request");
            }

            req = [new JsonRpcRequest(body.body)];
            break;
        case Request.POST:
            req = JsonRpcRequestProcessor.prototype._getRequest.call(this);
            break;
        default:
            throw new Error("Unsupported method");
            break;
    }

    return req;
};

/**
 * Retrieves body from given JsonRpcResponse
 * In case of JSONP adds wraps response in callback
 * @method
 * @private
 * @param {JsonRpcResponse} response
 * @return {String}
 */
OpalServerRequestProcessor.prototype._getBody = function (response) {
    response = JsonRpcRequestProcessor.prototype._getBody.call(this, response);

    //opalowy healthcheck GETem
    if (this._request.getMethod() == Request.GET && this._request.getPath().toLowerCase() != "/healthcheck") {
        response = this._callback + "(" + response + ");";
    }

    return response;
};


exports.OpalServerRequestProcessor = OpalServerRequestProcessor;