How to upload file to server using react-native

There is file uploading built into React Native.

Example from React Native code:

var photo = {
    uri: uriFromCameraRoll,
    type: 'image/jpeg',
    name: 'photo.jpg',
};

var body = new FormData();
body.append('authToken', 'secret');
body.append('photo', photo);
body.append('title', 'A beautiful photo!');

var xhr = new XMLHttpRequest();
xhr.open('POST', serverURL);
xhr.send(body);