properly fail when response status code is not 20*

ImageCacheProvider.js

@@ -119,11 +119,16 @@ function downloadImage(fromUrl, toFile, headers = {}) {
  RNFatchBlob
  .config({path: toFile})
  .fetch('GET', fromUrl, headers)
- .then(res => resolve(toFile))
- .catch(err =>
- deleteFile(toFile)
- .then(() => reject(err))
- )
+ .then(res => {
+ if (Math.floor(res.respInfo.status / 100) !== 2) {
+ throw new Error('Failed to successfully download image');
+ }
+ resolve(toFile);
+ })
+ .catch(err => {
+ return deleteFile(toFile)
+ .then(() => reject(err));
+ })
  .finally(() => {
  // cleanup
  delete activeDownloads[toFile];
@@ -153,6 +158,8 @@ function runPrefetchTask(prefetcher, options) {
  return getCachedImagePath(url, options)
  // if not found download
  .catch(() => cacheImage(url, options))
+ // allow prefetch task to fail without terminating other prefetch tasks
+ .catch(_.noop)
  // then run next task
  .then(() => runPrefetchTask(prefetcher, options));
  }