The error "TypeError: Cannot read property 'match' of undefined" occurs when trying to access the match property on an undefined value

Question

The error "TypeError: Cannot read property 'match' of undefined" occurs when trying to access the match property on an undefined value

Just a few minutes back, I set up a new project in the latest version of Ionic. I included

import { HTTP } from '@ionic-native/http'

and then proceeded to send a GET request to my backend application.

meetingsUrl: 'http://localhost:8080/test/all';
 this.http.useBasicAuth('login','password');
    this.http.get(this.meetingsUrl,{}, {'Content-Type':'application/json'})
      .then(data => {
        console.log(data);
      })
      .catch(error => {
        console.log(error);
      });

I'm using the 'ionic cordova run browser' command. I also attempted to run it on an android device, but encountered the same issue.

Unfortunately, in both scenarios, I encountered the following error:

TypeError: Cannot read property 'match' of undefined
    at getMatchingHostHeaders (advanced-http.js:118)
    at getMergedHeaders (advanced-http.js:126)
    at Object.get (advanced-http.js:210)
    at callCordovaPlugin (plugin.js:110)
    at plugin.js:136
    at util.js:22
    at new t (polyfills.js:3)
    at tryNativePromise (util.js:21)
    at getPromise (util.js:29)
    at wrapPromise (plugin.js:119)

angular cordova typescript ionic-framework ionic3

Answer 1

Answer №1

You made a mistake. Make sure to configure the headers properly.

Refer to the documentation

get(url, parameters, headers)

Here is an example from the documentation:

    this.http.get('https://google.com/', {
      id: 12,
      message: 'test'
    }, { Authorization: 'OAuth2: token' }).then(data => {
       console.log(data.status);
       console.log(data.data); // data received by server
       console.log(data.headers);
  })
  .catch(error => {
      console.log(error.status);
      console.log(error.error); // error message as string
      console.log(error.headers);
  });

Answer 2

You made a mistake. Make sure to configure the headers properly.

Refer to the documentation

get(url, parameters, headers)

Here is an example from the documentation:

    this.http.get('https://google.com/', {
      id: 12,
      message: 'test'
    }, { Authorization: 'OAuth2: token' }).then(data => {
       console.log(data.status);
       console.log(data.data); // data received by server
       console.log(data.headers);
  })
  .catch(error => {
      console.log(error.status);
      console.log(error.error); // error message as string
      console.log(error.headers);
  });

Answer 3

Answer №2

Here's an example of a LogIn request using the AppSignIn URL, which can be found at http://www.example.com/

public signInRequest(login:Login):Promise<OAuth> {
        let params:URLSearchParams = new URLSearchParams();
        params.set('userId', login.userId.toString());
        params.set('password', login.password.toString());
        let requestOption:RequestOptionsArgs = {
            search: params
        };
        return this.http
            .get(AppSignIn, requestOption)
            .toPromise()
            .then(this.extractData)
      }

Answer 4

Here's an example of a LogIn request using the AppSignIn URL, which can be found at http://www.example.com/

public signInRequest(login:Login):Promise<OAuth> {
        let params:URLSearchParams = new URLSearchParams();
        params.set('userId', login.userId.toString());
        params.set('password', login.password.toString());
        let requestOption:RequestOptionsArgs = {
            search: params
        };
        return this.http
            .get(AppSignIn, requestOption)
            .toPromise()
            .then(this.extractData)
      }

Answer 5

Answer №3

Give it a shot:

attemptLogin(){

   let encodedCredentials = this.http.generateBasicAuthHeader("username", "password"); // returns an object like {Authorization: "Basic encodedUsernameAndPassword" } 

   this.http.fetch("url", {}, encodedCredentials).then((response)=>{
      //handling success 
      console.log(response); 
   }).catch((error)=>{
      //handling error 
      console.log(error); 
   }); 

}

Answer 6

Give it a shot:

attemptLogin(){

   let encodedCredentials = this.http.generateBasicAuthHeader("username", "password"); // returns an object like {Authorization: "Basic encodedUsernameAndPassword" } 

   this.http.fetch("url", {}, encodedCredentials).then((response)=>{
      //handling success 
      console.log(response); 
   }).catch((error)=>{
      //handling error 
      console.log(error); 
   }); 

}

The error "TypeError: Cannot read property 'match' of undefined" occurs when trying to access the match property on an undefined value

Answer №1

Answer №2

Answer №3

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