How to add SockJS into Angular 2 project?
Solution 1
In new version of angular2 CLI https://cli.angular.io/ it is simple to add library.
If you want to add only sockjs_client
1) npm i --save sockjs-client
2) In typings.d.ts add this declaration declare module 'sockjs-client';
But I would recommend to use STOMP-Over-WebSocket Service for angular 2
Install this npm packages
npm i --save stompjs
npm i --save sockjs-client
npm i --save ng2-stomp-service
In typings.d.ts
Add stompjs
and sockjs-client
module declaration
declare module 'stompjs';
declare module 'sockjs-client';
In app.module.ts
import { StompService } from 'ng2-stomp-service';
@NgModule({
...
providers: [StompService]
})
In app.components.ts
import { StompService } from 'ng2-stomp-service';
private wsConf = {
host:'test.com'
}
constructor(stomp: StompService) {
stomp.configure(this.wsConf);
stomp.startConnect().then(() => {
console.log('connected');
});
}
source https://github.com/devsullo/ng2-STOMP-Over-WebSocket
Solution 2
I found a solution to this problem.
The issue is that: npm install sockjs-client
downloads sockjs-node instead of client. I hope they will fix it soon.
In your project you're pointing to vendor/sockjs-client/lib/entry.js
instead you should download this file http://cdn.jsdelivr.net/sockjs/1/sockjs.min.js
put it in your project and point to it in system-config.ts
.
Solution 3
In Angular2, the easiest way to import sockjs is to use:
import 'your_path/sockjs-1.1.1.js'
but before you import, please modify part of the code in first line of 'sockjs-1.1.1.js'.
if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.SockJS=e()}
replace the code above to:
window.SockJS = e()
after then SockJS
could be access from anywhere because now it's a property of window in browser.Also you need to tell typescript SockJS is an ambient variable by adding:
declare let SockJS: any
janetsmith
Updated on June 15, 2022Comments
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janetsmith almost 2 years
I use angular-cli to generate a new project. Now I want to add socketJs to the project, but keep getting errors in browser console:
GET http://localhost:4200/url-parse 404 (Not Found) GET http://localhost:4200/inherits 404 (Not Found) Unhandled Promise rejection: Error: XHR error (404 Not Found) loading http://localhost:4200/url-parse at XMLHttpRequest.wrapFn [as _onreadystatechange] (http://localhost:4200/vendor/zone.js/dist/zone.js:769:30) at ZoneDelegate.invokeTask (http://localhost:4200/vendor/zone.js/dist/zone.js:356:38) at Zone.runTask (http://localhost:4200/vendor/zone.js/dist/zone.js:256:48) at XMLHttpRequest.ZoneTask.invoke (http://localhost:4200/vendor/zone.js/dist/zone.js:423:34) Error loading http://localhost:4200/url-parse as "url-parse" from http://localhost:4200/vendor/sockjs-client/lib/main.js ; Zone: <root> ; Task: Promise.then ; Value: Error: Error: XHR error (404 Not Found) loading http://localhost:4200/url-parse(…) Error: Uncaught (in promise): Error: Error: XHR error (404 Not Found) loading http://localhost:4200/url-parse(…) GET http://localhost:4200/json3 404 (Not Found) GET http://localhost:4200/debug 404 (Not Found) GET http://localhost:4200/events 404 (Not Found) GET http://localhost:4200/eventsource 404 (Not Found) GET http://localhost:4200/crypto 404 (Not Found) GET http://localhost:4200/json3 404 (Not Found) GET http://localhost:4200/url-parse 404 (Not Found) GET http://localhost:4200/debug 404 (Not Found) GET http://localhost:4200/inherits 404 (Not Found) Assertion failed: loading or loaded GET http://localhost:4200/events 404 (Not Found) Assertion failed: loading or loaded GET http://localhost:4200/faye-websocket 404 (Not Found) Assertion failed: loading or loaded GET http://localhost:4200/eventsource 404 (Not Found) Assertion failed: loading or loaded GET http://localhost:4200/http 404 (Not Found) GET http://localhost:4200/https 404 (Not Found)
This is my steps and configuration:
typings install sockjs-client --save --ambient
angular-cli-build.js
var Angular2App = require('angular-cli/lib/broccoli/angular2-app'); module.exports = function(defaults) { return new Angular2App(defaults, { vendorNpmFiles: [ 'systemjs/dist/system-polyfills.js', 'systemjs/dist/system.src.js', 'zone.js/dist/**/*.+(js|js.map)', 'es6-shim/es6-shim.js', 'reflect-metadata/**/*.+(ts|js|js.map)', 'rxjs/**/*.+(js|js.map)', '@angular/**/*.+(js|js.map)', 'sockjs-client/**/*.+(js)' ] }); };
system-config.ts
/** Map relative paths to URLs. */ const map: any = { 'sockjs-client': 'vendor/sockjs-client/lib/entry.js' }; /** User packages configuration. */ const packages: any = { 'vendor/sockjs-client/lib': { 'format': 'cjs', 'defaultExtension': 'js' } };
My custom service class:
import { Injectable } from '@angular/core'; import * as SockJS from 'sockjs-client'; import BaseEvent = __SockJSClient.BaseEvent; import SockJSClass = __SockJSClient.SockJSClass; @Injectable() export class WebsocketService { private sockJs: SockJSClass; constructor() { console.log('constuctor'); this.sockJs = new SockJS('/hello'); } }
Please let me know how to fix it, thanks a lot!
I can, however, eliminate some error by including the missing lib by adding them one by one in system-config.ts. But I doubt this is the right approach.
const map: any = { 'sockjs-client': 'vendor/sockjs-client/lib/entry.js', 'json3': 'vendor/sockjs-client/node_modules/json3/lib/json3.js', 'url-parse': 'vendor/sockjs-client/node_modules/url-parse/index.js', 'inherits': 'vendor/sockjs-client/node_modules/inherits/inherits.js', 'debug': 'vendor/sockjs-client/node_modules/debug/debug.js', ... };
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Devsullo about 7 yearsWhat about now?
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Baum mit Augen about 7 yearsLooks better now, thanks. (Not my downvote btw, I lack domain knowledge to vote on this.)