Httpclient response null when calling Java Servlet

Niels Van Haren Published at Dev

Niels Van Haren

I'm having some difficulty figuring out why im getting a null response in angular when i try to do a post to a httpservlet (java) in a WAS environment.

What im trying to do is call an api to login. I would like to receive the response headers, but im getting a null response, making it impossible to do anything with the response.

I tried to send my parameters as form data with the content-type application/x-www-form-urlencoded;charset=UTF-8 and as query parameters with no content-type defined.

In both situations im able to login and im getting a 200 response with header information in my browser.

this is my call

    return this.http.post(this.contextRoot.getHost() + 'osa-kantoor-ws/api/auth/login?' + param1 + "&" + param2,null, this.httpOptions).map((res : Response) => {
      localStorage.setItem('currentUser', JSON.stringify(username));
      return res;
    });

My header info now is

  httpOptions = {
    headers: new HttpHeaders({'Content-Type' : 'application/json', 'Accept':  'application/text'}),
    params: {}
  };

the localstorage item is set, but the response information is null.

this is my subscribe

 login() {
    this.loginService.login(this.loginForm.value.userName,this.loginForm.value.password)
      .subscribe(
        data => {
          console.log(data);
          this.router.navigate([this.returnUrl]);
        },
        error => {
          console.log(error);
          this.loginfail = true;
        });
  }

When im checking the browser info on my response header i get the following info

can anyone tell me what im missing?

below is the original method

 login(username: string, password: string) {
    let param1: string = encodeURIComponent('userName') + '=' + encodeURIComponent(username);
    let param2: string = encodeURIComponent('password') + '=' + encodeURIComponent(password);
    let formParams: string = param1 + '&' + param2;
    return this.http.post(this.contextRoot.getHost() + 'osa-kantoor-ws/api/auth/login', formParams, this.httpOptions).map(response=> {
      localStorage.setItem('currentUser', JSON.stringify(username));
      console.log(response);
      return response;
    });
  }

Niels Van Haren

thank you AJT_82,

adding observe: 'response' to the config is the solution.

response is now what i expect. the default response is observe: 'body' apparently.

My HTTP config is now

  httpOptions = {
    headers: new HttpHeaders({'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8','Accept':  'application/xml'}),
    observe: 'response'
  };

and my response is now

Collected from the Internet

Please contact [email protected] to delete if infringement.

edited at2020-10-28

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