我在前端使用Angular2 webapp项目,后端使用Vertex3。
使用Sockjs,我正在创建websocket (在客户端),以便在前端和后端之间创建一个通信通道。
我已经使用npm安装了sockjs-客户端:
npm安装sockjs-client
当我在LoginService.ts文件中导入sockjs时:
从‘’导入*作为SockJS;
export class LoginService {
URL: string = 'http://localhost:8082/eventbus';
sock: SockJS;
handlers = {};
private _opened: boolean = false;
public open(): void {
if (!this._opened) {
this.sock = new SockJS(this.URL);
this.sock.onopen = (e) => {
this.callHandlers('open', e);
}
this.sock.onmessage = (e) => {
this.messageReceived(e);
}
this.sock.onclose = (e) => {
this.callHandlers('close', e);
}
this._opened = true;
}
public isOpen(): boolean {
return this._opened;
}
public close(): void {
if (this._opened) {
this.sock.close();
delete this.sock;
this._opened = false;
}
}
private messageReceived (e) {
var msg = JSON.parse(e.data);
this.callHandlers('message', msg.type, msg.originator, msg.data);
}
private callHandlers (type: string, ...params: any[]) {
if (this.handlers[type]) {
this.handlers[type].forEach(function(cb) {
cb.apply(cb, params);
});
}
}
public send (type: string, data: any) {
if (this._opened) {
var msg = JSON.stringify({
type: type,
data: data
});
this.sock.send(msg);
}
}
}运行angular2 webapp项目时,使用
npm运行服务器
但是在客户端没有创建websocket连接。因为我已经使用顶点vertex.createHttpServer (托管在:http://localhost:8082上)创建了服务器。
所以我有两个问题:
1.无法在angular2 webapp中导入sockjs客户端,因此无法创建websocket连接。
2.将angular2 webapp项目构建为“sockjs”时,在node_modules中找不到错误(奇怪的是,它存在于node_modules中)
我遗漏了什么吗?
提前谢谢!
发布于 2016-12-22 15:13:24
找到了一种在angular2中集成套接字而不使用typings的方法。
使用以下步骤:
sockjs-event.js和sockjs-client.js中的index.html <!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>MyApp</title>
<script src="/sockjs-client.js"></script>
<script src="/sockjs-event.js"> </script>
......
</head>
<body>
<my-app>Loading...</my-app>
</body>
</html>myapp.service.ts declare var EventBus: any;
@Injectable()
export class ConsoleService {
URL: string = 'http://localhost:8082/eventbus';
handlers = {};
eventBus: any;
private _opened: boolean = false;
public open(): void {
if (!this._opened) {
this.eventBus = new EventBus(this.URL);
this.eventBus.onopen = (e) => {
this._opened = true;
console.log("open connection");
this.callHandlers('open', e);
this.eventBus.publish("http://localhost:8082", "USER LOGIN INFO");
this.eventBus.registerHandler("http://localhost:8081/pushNotification", function (error, message) {
console.log(message.body);
//$("<div title='Basic dialog'>Test message</div>").dialog();
});
}
this.eventBus.onclose = (e) => {
this.callHandlers('close', e);
}
}
}
public isOpen(): boolean {
return this._opened;
}
public close(): void {
if (this._opened) {
this.eventBus.close();
delete this.eventBus;
this._opened = false;
}
}
.......
public send (type: string, data: any) {
if (this._opened) {
var msg = JSON.stringify({
type: type,
data: data
});
this.eventBus.publish("http://localhost:8082",msg);
}
}
};
export default ConsoleService;app.module.ts ),并在角引导中加载您的服务myapp.service.ts import { AppComponent } from './app.component';
....
import { ConsoleService } from 'services/myapp.service';
@NgModule({
imports: [
....
],
providers: [ ConsoleService ],
declarations: [
AppComponent,
...
],
bootstrap: [AppComponent]
})4.从起始组件
app.component.ts调用打开的websocket
import { Component } from '@angular/core';
import 'style/app.scss';
import { ConsoleService } from 'services/globalConsole.service';
@Component({
selector: 'my-app', // <my-app></my-app>
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss']
})
export class AppComponent {
constructor (private consoleService: ConsoleService) {
consoleService.onOpen((e) => {
consoleService.send('message', "xyz");
});
consoleService.open();
}
}EventBus在任何.ts文件中使用ConsoleService和registerHandler。我希望这会有所帮助:)
https://stackoverflow.com/questions/41208297
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