HttpParams不工作在角获取502号误差

Question

我用的是角8

• I使用HttpParams通过Post方法
• 向服务器发送数据我得到502状态码错误< code >E29，通过HttpPramsH 210F 211发送数据

误差

HttpErrorResponse {headers: HttpHeaders，status: 502，statusText：“坏网关”，url："http://central-portal-app-alb-1565375077.ap-south-1.elb.amazonaws.com/api/v1/user/login"，ok: false，…} headers: HttpHeaders {normalizedNames: Map(0)，lazyUpdate: null，lazyInit:ƒ} status: 502 statusText：“坏网关”

这是我的服务文件代码

service.ts

@Injectable()
export class RestService {
  baseUrl = environment.baseUrl;
  login =  this.baseUrl + 'user/login';


  constructor(private http: HttpClient) {

  }

userlogin(userid, smpassword) {

const params = new HttpParams()
.set('user_id', userid)
.set('sm_password', smpassword);

console.log(params);


return this.http.post(this.baseUrl + 'user/login',  params.toString(),
{
  headers: new HttpHeaders({
   'Content-Type' : 'application/json'
  })
}
);

login.component.ts

@Component({
  selector: 'app-login',
  templateUrl: './login.component.html',
  styleUrls: ['./login.component.css']
})
export class LoginComponent implements OnInit {

  Userlogin: FormGroup;

  constructor(private route: Router , private fb: FormBuilder , private rest: RestService) {
        this.Userlogin = this.fb.group({
          email : ['', [Validators.required , Validators.pattern('^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+.[a-zA-Z0-9-.]+$') ]],
          password : ['', [Validators.required , Validators.minLength(5) ] ]
        });
  }

  // , Validators.required

  ngOnInit() { }


  login() {

    const email =  this.Userlogin.get('email').value;
    const password = this.Userlogin.get('password').value;
    this.rest.userlogin(email, password).subscribe(
      result => {
        console.log(result);
      }
    );

    //  this.route.navigateByUrl('/pendingapproval');

  }

Answer 1

尝试在浏览器上访问api端点，检查URL是否正确，并可能在标头中包括访问控制允许原点

Answer 2

我不确定，但请检查一下.

这应该是您的服务文件代码

userlogin(userid, smpassword) {
const params = new HttpParams()
.set('user_id', userid)
.set('sm_password', smpassword);
console.log(params);    
return this.http.post(this.baseUrl+'user/login',JSON.stringify(params)).pipe(map((res) => {
  return res;
}));

}

这应该是你的login.component.ts

     login() {
        const email =  this.Userlogin.get('email').value;
        const password = this.Userlogin.get('password').value;
        this.rest.userlogin(email, password).subscribe((result)=> {
        result = JSON.Parse(result)
            console.log(result);
          }
        );