我在执行POST请求时无法更改标头。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 = 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
let options = new RequestOptions({
headers: headers
});
this._http.post('http://mybackend.local/api/auth', body, options)
.subscribe(
data => { console.log(data); },
err => { console.log(err); },
{} => { console.log('complete'); }
);
}
两者都不起作用。我没有忘记导入任何类。
我正在使用Google Chrome。所以我检查了“网络”标签,我的请求就在那里,它说我的Content-Type是text / plain。
这是一个错误还是我做错了什么?
更新 我忘了从Angular2 / http:
导入Headers类import {Headers} from 'angular2/http';
答案 0 :(得分:21)
我认为你正在以正确的方式使用Angular2的HTTP支持。看到这个工作的plunkr:https://plnkr.co/edit/Y777Dup3VnxHjrGSbsr3?p=preview。
也许,您忘记导入Headers
课程。我前一段时间犯了这个错误,JavaScript控制台没有错误,但我试图设置的标题实际上没有设置。例如,关于Content-Type
标题,我有text/plain
而不是application/json
。您可以通过在导入中对Headers
进行评论来在我提供给您的plunkr中重现此内容。
这是一个完整的工作样本(包括导入):
import {Component} from 'angular2/core';
import {Http,Headers} from 'angular2/http';
import 'rxjs/Rx';
@Component({
selector: 'my-app',
template: `
<div (click)="executeHttp()">
Execute HTTP
</div>
`
})
export class AppComponent {
constructor(private http:Http) {
}
createAuthorizationHeader(headers:Headers) {
headers.append('Authorization', 'Basic ' +
btoa('a20e6aca-ee83-44bc-8033-b41f3078c2b6:c199f9c8-0548-4be79655-7ef7d7bf9d20'));
}
executeHttp() {
var headers = new Headers();
this.createAuthorizationHeader(headers);
headers.append('Content-Type', 'application/json');
var content = JSON.stringify({
name: 'my name'
});
return this.http.post(
'https://angular2.apispark.net/v1/companies/', content, {
headers: headers
}).map(res => res.json()).subscribe(
data => { console.log(data); },
err => { console.log(err); }
);
}
}
希望它可以帮到你, 亨利