我试图将localhost：4200上的Angular4数据发布到localhost：8000上的API.我和Postman合作得很好,但是和Angular不一样.然后我得到：
无法加载资源：服务器响应状态为422(不可处理的实体)
这是发布到api的服务：
@Injectable()
export class ApiService {
constructor(private http: Http) { }
login(username: string,password: string): Observable<Response>{
const url = 'http://localhost:8000/login';
const json = JSON.stringify({username: username,password: password});
const headers: Headers = new Headers();
headers.append('Content-Type','application/json; charset=UTF-8');
return this.http.post(url,json,headers )
.map(res => res.json());
}
}
logIn(user: string,password: string){
this.apiService.login(user,password).subscribe(
data => console.log(data),error => console.log(error)
);
}
解决方法
The 422 (Unprocessable Entity) status code means the server
understands the content type of the request entity (hence a
415(Unsupported Media Type) status code is inappropriate),and the
Syntax of the request entity is correct (thus a 400 (Bad Request)
status code is inappropriate) but was unable to process the contained
instructions.
