react-native bulit-in tool for image upload

UploadImage.js

export function postData (url, params, fileURL) {
  let data = new FormData()
  if (fileURL) {
    data.append('image', {uri: fileURL, name: 'image.jpg', type: 'image/jpg'})
  }
  _.each(params, (value, key) => {
    if (value instanceof Date) {
      data.append(key, value.toISOString())
    } else {
      data.append(key, String(value))
    }
  })
  const config = {
    method: 'POST',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'multipart/form-data; boundary=6ff46e0b6b5148d984f148b6542e5a5d',
      'Content-Language': React.NativeModules.RNI18n.locale,
      'Authorization': 'Token ABCDEF123457890',
    },
    body: data,
  }
  return fetch(API_URL + url, config)
    .then(checkStatusAndGetJSONResponse)
}