相关疑难解决方法(0)

所以,我正在通过打字稿在他们的网站上关注角度2指南,并且我陷入了http api集成.我正在尝试创建一个简单的应用程序,可以通过soundcloud api搜索一首歌,但是我很难实现和理解如何开始,而且在线资源以很多不同的方式完成它(我相信快速的角度2语法更改)早些时候).

所以目前我的项目看起来像这样

app
  components
    home
      home.component.ts
      ...
    search
      search.component.ts
      ...
    app.ts
    ...
  services
    soundcloud.ts
  bootstrap.ts
index.html

在示例中没有任何花哨的东西,主要文件将是

app.ts

import {Component, View} from 'angular2/core';
import {RouteConfig, ROUTER_DIRECTIVES} from 'angular2/router';

import {HomeComponent} from './home/home.component';
import {SearchComponent} from './search/search.component';

@Component({
    selector: 'app',
    templateUrl: 'app/components/app.html',
    directives: [ROUTER_DIRECTIVES]
})

@RouteConfig([
  {path: '/home', name: 'Home', component: HomeComponent, useAsDefault: true},
  {path: '/search', name: 'Search', component: SearchComponent}
])

export class App { }

bootstrap.ts

    import {App}     from './components/app';
import {bootstrap}        from 'angular2/platform/browser';
import {ROUTER_PROVIDERS} from 'angular2/router'; …

在执行POST请求时我无法更改标头.我尝试了几件事:

简单的课程:

export class HttpService {
    constructor(http: Http) {
        this._http = http;
    }
}

我试过了:

testCall() {
    let body = JSON.stringify(
        { "username": "test", "password": "abc123" }
    )

    let headers = new Headers();
    headers.append('Content-Type', 'application/json'); // also tried other types to test if its working with other types, but no luck

    this._http.post('http://mybackend.local/api/auth', body, { 
        headers: headers 
    })
    .subscribe(
        data => { console.log(data); },
        err => { console.log(err); },
        {} => { console.log('complete'); }
    );
}

2:

testCall() {
    let body …

我正在使用Angular2从Java Spring后端应用程序获取访问令牌.我可以通过CURL获取令牌,但不能通过Angular形式获取.

 curl localhost:8085/uaa/oauth/token --data "grant_type=password&scope=write&username=MY-USERNAME&password=MY-PASSWORD" --user user:pwd

我在这样的Java后端启用了Cors:

 public void doFilter(ServletRequest servletRequest, ServletResponse   servletResponse, FilterChain chain) throws IOException, ServletException {
    final HttpServletResponse response = (HttpServletResponse) servletResponse;
    response.setHeader("Access-Control-Allow-Origin", "*");
    response.setHeader("Access-Control-Allow-Credentials", "true");
    response.setHeader("Access-Control-Allow-Methods", "POST, PUT, DELETE, GET, HEAD, OPTIONS");
    response.setHeader("Access-Control-Allow-Headers", "Origin, Accept, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers, If-Modified-Since");
    chain.doFilter(servletRequest, servletResponse);
}

我的Angular代码如下所示:

import {Injectable, Component} from 'angular2/core';
import {Observable} from 'rxjs/Rx';
import {Http, HTTP_PROVIDERS, Headers} from 'angular2/http';

@Component({
   viewProviders: [HTTP_PROVIDERS]
})

@Injectable()
export class Authentication {
  token:string;
  http:Http;

  constructor(http:Http) {
    this.token = …