CODEWITHSUNDEEP
reactjsfetchreact-nativenative
Lukas
Lukas

Reputation: 340

React Native Expo fetch() error Network request failed

I try to fetch data from an external server using fetsh() in React Native. My query looks like this:

fetch('https://xxx.xx/login.php', {
  method: 'POST',
  headers: {
    Accept: 'application/json',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    email: email,
    password: password
  })
}).then((response) => response.json())
  .then((responseJson) => {
   if(responseJson === 'Data Matched'){
     this.props.navigation.navigate('Second', { Email: email});
    }else{
     Alert.alert(responseJson);
    }
  }).catch((error) => {
    console.error(error);
    return error;
  });

during the execution on my Android Device I get the following error:

  Network request failed
  Stack trace:
  node_modules\whatwg-fetch\dist\fetch.umd.js:505:17 in setTimeout$argument_0
  node_modules\react-native\Libraries\Core\Timers\JSTimers.js:135:14 in _callTimer
  node_modules\react-native\Libraries\Core\Timers\JSTimers.js:387:16 in callTimers
  node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:425:19 in __callFunction
  node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:112:6 in __guard$argument_0
  node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:373:10 in __guard
  node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:111:4 in callFunctionReturnFlushedQueue
  [native code]:null in callFunctionReturnFlushedQueue
  ...

When I open the file in the browser, everything works without problems.

I am glad about your help. Thanks a lot in advance. Lukas

Upvotes: 1

Views: 4250

Answers (1)

Lukas
Lukas

Reputation: 340

after a long search I have now found the solution. Through a test on https://www.ssllabs.com/ssltest of my certificate I have received the following message:

This server's certificate chain is incomplete. Grade capped to B.

I uploaded my Certificate to https://certificatechain.io/ and added the .crt file to my SSL Configuration on my webserver. Now all works fine for me.

Hope I can help you with this.

Upvotes: 2

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