Sending Data to Server using Express(Node.js)

[Sumit]

I am new in angular2-Nativescript when i am sending data to server which is in Express(Node.js). Some function are able to send data to server but some function is not working.

Working Code

login(user: User) {
    let headers = new Headers();
    headers.append("Content-Type", "application/json");
    return this._http.post(
      Config.apiUrl + "login",
      JSON.stringify({
        email: user.email,
        password: user.password
      }),
      { headers: headers }
    )
      .map(response => response.json())
      .map((response) => {
        if (response.authentication == true) {
          alert('Login Successful');
          console.log("returning result = ", JSON.stringify(response.result));
          console.log("response == ", JSON.stringify(response.result));
          localStorage.setItem('userInfo1', JSON.stringify(response.result));
        } else {
          alert(response.message);
        }
      })
      .catch(this.handleErrors);
  }

 

Not Working Code

verify(user: User) {
    console.log(JSON.stringify({ user }));
    let headers = new Headers();
    headers.append("Content-Type", "application/json");
    return this._http.post(
      Config.apiUrl + "verify",
      JSON.stringify({
        verificationCode: user.verificationCode
      }),
      { headers: headers }
    )
      .map(response => response.json())
      .map((response) => { })
      .catch(this.handleErrors);
  }

I am facing this issue in ios

[Nick Iliev]

Hello Sumit,

I have examed your code, still without a detail on what is the output behaviour I can not guide you to a reasonable solution. We will need the error you are receiving or/and the behaviour you are expecting and what is really happening after you try to execute the verify function in your application.

However, there is some possible reason for your code not to work in iOS (of course, the following are just a suggestions).

One thing is that on iOS you can not make the request to HTTP but by default only to HTTPS. You will receive transport protocol security error if you try that. Another possible issue is when you are receiving the response as JSON you are not actually working with it.
response) => { }
Is that the expected behaviour!? 
Or maybe you need to log the response and further parse the response data like this

fetch("https://httpbin.org/post", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ username: this.user , password: this.pass })
}).then(response => {
    return response.json();
}).then(res => {
    var jsonObjectBody = JSON.parse(res.data); // parse the data need to JSON
    this.message = "Data successfully send by user " + jsonObjectBody.username;
}).catch(err => {
    // Error
});

We will wait for your error log and detailed description the issue to help you out further.

Regards,
Nikolay Iliev
Telerik by Progress