dl/lib/cdf/CdfApplicationContainer.js

DreamLab Libs

var Class   = require('core').Class;
var CdfPage = require('./CdfPage.js').CdfPage;
var CdfBlocks = require('./CdfBlocks.js').CdfBlocks;
var Request = require('core').http.Request;
var Loader  = require('core').http.Loader;

var OpalCredentialsProvider = require('../opal/OpalCredentialsProvider.js').OpalCredentialsProvider;

var CdfApplicationContainer = function () {
    this.initialize = function (name) {
        this._applications = {};
        this._revDeps = {};
        this._name = name;
    };
    
    this.add = function (application) {
        var block = application.name;
        this._applications[block] = application;
        this._revDeps[application.src] = application.name; //megahack
    };
    
    this.get = function (block) {
        if (this._applications.hasOwnProperty(block)) {
            return this._applications[block];
        } else {
            return null;
        }
    };
    
    this.getApplications = function () {
        var applications = [];
        for (var i in this._applications) {
            if (this._applications.hasOwnProperty(i)) {
                applications.push(this._applications[i]);
            }
        }
        return applications;
    };
    
    this.getName = function () {
        return this._name;
    };
    
    this.getUrl = function () {
        for (var application in this._applications) {
            if (this._applications.hasOwnProperty(application)) {
                return this._applications[application].controller;
            }
        }
        throw 'Add some application to CdfApplicationContainer then request for URL';
    };

    this.getCredential = function () {
        for (var application in this._applications) {
            if (this._applications.hasOwnProperty(application)) {
                return this._applications[application].credential;
            }
        }
        return null;
    };

    this.fetchApplication = function (request, logger, cb) {
        this.callback = cb;
        var that = this,
            req = new Request(request),
            loader = new Loader();

        var loaderTimeStart = 0;
        
        var onError = function (e)  {
            var loaderTimeEnd = Date.now() - loaderTimeStart;
            console.info('ES/CdfApplicationContainer/BACKEND: tt=%s code=%s len=%s method=%s host=%s url=%s', loaderTimeEnd, 0, 0, req.getMethod(), req.getHeader('host'), req.getUrl());
            cb(e, null);
        };

        req.setUrl(this.getUrl());
        req.setHost(req.getConnectionHost());

        if (Object.keys(req.getQuery()).length == 0) {
            req.setQuery(request.getQuery());
        }

        req.removeHeader("accept-encoding");
        req.removeHeader("if-modified-since");
        req.removeHeader("if-none-match");
        req.removeHeader("x-onet-regenerate");
        req.removeHeader('range');
        req.setCookie("onet_nolajtredir=1");
        
        if (process.env['OPAL_IDENTITY']) {
            req.setHeader('x-onet-app', process.env['OPAL_IDENTITY'], true);
        }
        
        // oznaczamy ze request poszedl z CDFApplication
        var userAgent = req.getHeader('user-agent');
        if (userAgent) {
            req.setHeader('user-agent', userAgent + ' CDF_APP', true);
        } else {
            req.setHeader('user-agent', 'CDF_APP', true);
        }        
        
        loader.addEventListener(
                Loader.Event.LOADED,
                function (e) {
                    var response = e.data,
                        content = response.getHeader('content-type');
                    
                    var loaderTimeEnd = Date.now() - loaderTimeStart;
                    console.info('ES/CdfApplicationContainer/BACKEND: tt=%s code=%s len=%s method=%s host=%s url=%s', loaderTimeEnd, response.getStatusCode(), response.getBody().length(), req.getMethod(), req.getHeader('host'), req.getUrl());
                    
                    if (logger) {
                        logger.parse(response.getHeaders(), "CdfApplication(" + that.getUrl()+')');
                    } 
                    if (content && content.indexOf('text/html') > -1 && response.getStatusCode() == 200)  {
                        var body = e.data.getBody(), page;
                        try {
                            page = new (require('./CdfPage.js').CdfPage)(body.toUTF8String());
                        } catch (e) {
                            console.error('Unable to parse page', e);
                            cb(null, response);
                            return;
                        }
                        var blocks = page.blocks._models, newBlocks = new CdfBlocks();
                        if (blocks.length) {
                            for (var i=0,max=blocks.length; i<max; i++) { // magia, podmieniamy tutaj tokeny i nazwy dla bloków
                                var appname = that._revDeps[blocks[i].name];
                                var app = that._applications[appname];
                                if (!app) {
                                    continue; 
                                }
                                blocks[i].name = app.name;
                                blocks[i].token = app.token;
                                //blocks[i].cache = app.cache;
                                app.cache = blocks[i].cache;
                                newBlocks.add(blocks[i]);
                            }
                            cb(null, newBlocks);
                        } else {
                            cb(null, response);
                        }
                    } else {
                        cb(null, response);
                    }
                }
        );
        loader.addEventListener(Loader.Event.ERROR, onError);
        loader.setFollowRedirects(false);
        loader.setTimeout(10000);

        this._handleAuthorization(this.getCredential(), req, function (error) {
            //error ? onError(error) : loader.load(req);
            if (error) {
                onError(error);
            } else {
                loaderTimeStart = Date.now();
                loader.load(req);
            }            
        });
    };

    this._handleAuthorization = function (credential, request, callback) {
        if (!credential) {
            callback(null);
            return;
        }
        
        this._credentialProvider = new OpalCredentialsProvider(credential, process.env.OPAL_IDENTITY);
        this._credentialProvider.get(function (error, cred) {
            if (error) {
                callback(error);
            } else {
                if (cred.type == 'Basic') {
                    var auth_string   = [cred.login, cred.password].join(':');
                    var authorization = [cred.type, (new Buffer(auth_string).toString('base64'))].join(' ');
                    request.setHeader('authorization', authorization, true);
                }
                callback(null);
            }
        });
    };
};

CdfApplicationContainer = new Class(new CdfApplicationContainer());
exports.CdfApplicationContainer = CdfApplicationContainer;