我正在尝试将post api的标题设置为application.json
let options: { headers?: {'Content-Type':'application/json'} }
但没有设定。
答案 0 :(得分:13)
要使用新的 HttpClient 类定义内容类型,您需要:
@angular/common/http
导入(而不是从当前标记为已弃用的@angular/http
导入)import { HttpClient, HttpHeaders } from '@angular/common/http';
HttpClient
:constructor(private http: HttpClient) { }
headers
以定义所需的内容类型,并options
来准备您将在通话中使用的对象:private options = { headers: new HttpHeaders().set('Content-Type', 'application/json') };
this.http.post('your target url', yourBodyObject, this.options)
其中'your target url'
和yourBodyObject
仅用作示例,需要替换为您的真实数据。
答案 1 :(得分:6)
Angular文档中有一节内容 - 最近可能会添加:
import { HttpHeaders } from '@angular/common/http';
const httpOptions = {
headers: new HttpHeaders({
'Content-Type': 'application/json',
'Authorization': 'my-auth-token'
})
};
当我尝试使用上述格式向httpOptions添加响应类型时,TypeScript给了我警告,所以我成功使用了以下内容:
let headers = new HttpHeaders({
'Content-Type': 'application/text'
});
return this.http.get(url, { responseType: 'text', headers })
文档link
答案 2 :(得分:3)
检查一下,
import {Http, Response, Headers, RequestOptions} from "@angular/http";
和
let headers = new Headers({ 'Content-Type': 'application/json'});
let options = new RequestOptions({headers: headers});
用于Http通话。
答案 3 :(得分:2)
在此处尝试此代码=>
let header = {'Content-Type':'application/json'}
答案 4 :(得分:1)
以下是一个例子:
public _funName( _params ): Observable<void> {
const headers = new Headers( { 'Content-Type': 'application/json' } // set your header);
/* The option withCredentials: true in the code bellow is used with the CORS variables, that is when the REST functions are on another server then Node.js and the Angular2 development application. */
const options = new RequestOptions( { headers: headers, withCredentials: true } );
return this.http.post( _yourLink, _params, options )
.map( this.extractData )
.catch( this.handleError );
}
public extractData( res: Response ) {
const body = res.json();
// const body = res;
return body || {};
}
public handleError( error: Response | any ) {
let errMsg: string;
if ( error instanceof Response ) {
const body = error.json() || '';
const err = body.error || JSON.stringify( body );
errMsg = `${error.status} - ${error.statusText || ''} ${err}`;
} else {
errMsg = error.message ? error.message : error.toString();
}
console.error( errMsg );
return Observable.throw( errMsg );
}
我希望这会对你有所帮助。
答案 5 :(得分:0)
let hdr = {
'Content-Type': 'application/json'
};
let options = { headers: hdr };
this.httpClient.post(url, payloadData, options);
答案 6 :(得分:0)
OP代码段:
let options: { headers?: {'Content-Type':'application/json'} }
定义了 type { headers?: {'Content-Type':'application/json'} }
类型的选项变量,该变量是有效的,但不是您想要的变量。将:
更改为=
以使其成为赋值,并删除了?
,这对赋值无效。这是合法的,与OP所尝试的最接近,并且应该起作用:
let options = { headers: {'Content-Type':'application/json'} };
答案 7 :(得分:0)
如果您使用的是http.put()
,请使用以下代码并接收json /纯文本:
const httpOpt = {
headers: new HttpHeaders({
'Content-Type': 'application/json',
'Accept': 'application/json, text/plain'
})
};
this.http.put('http://localhost:8080/bookapi/api/book/'+id, JSON.stringify(requestObj), httpOpt);
答案 8 :(得分:0)
这是我在user.service.ts中获取用户详细信息的方式
导入:
import {HttpClient, HttpHeaders} from '@angular/common/http';
import {Observable} from 'rxjs/Observable';
import {Injectable} from '@angular/core';
在类内声明变量:
@Injectable()
export class UserService {
private httpHeaders = new HttpHeaders().set('Content-Type','application/json');
protected options = {headers: this.httpHeaders,
search:{}
};
constructor(private http: HttpClient) {
}
/**
* getting user details
* @returns {Observable<any>}
*/
getUser(): Observable<any>{
return this.http.get('userApi/').catch(err => this.errorHandler(err));
}
/**
*
* @param error
* @returns {any}
*/
errorHandler(error: any): any {
if (error.status < 400) {
return Observable.throw(new Error(error.status));
}
}
}
答案 9 :(得分:0)
我们可以通过创建新的 HttpHeaders 对象来定义请求标头。
HttpHeaders对象本质上是不可变的。因此,请在同一行中设置所有标头详细信息。
getUser(name: string, age: string) {
const params = new HttpParams().set('name', name).set('age', age);
const headers = new HttpHeaders()
.set('Content-Type', 'application/json')
.set('Authorization', 'my token');
return this.http
.get(`${endPoint}/user`, {
params,
headers
});
}