Apply fix to #264

src/android/src/main/java/com/RNFetchBlob/RNFetchBlobReq.java

@@ -500,11 +500,32 @@ private void done(Response resp) {
  // It uses customized response body which is able to report download progress
  // and write response data to destination path.
  resp.body().bytes();
+
  } catch (Exception ignored) {
 // ignored.printStackTrace();
  }
  this.destPath = this.destPath.replace("?append=true", "");
- callback.invoke(null, RNFetchBlobConst.RNFB_RESPONSE_PATH, this.destPath);
+
+ try {
+ long expectedLength = resp.body().contentLength();
+ // when response contains Content-Length, check if the stream length is correct
+ if(expectedLength > 0) {
+ long actualLength = new File(this.destPath).length();
+ if(actualLength != expectedLength) {
+ callback.invoke("RNFetchBlob failed to write data to storage : expected " + expectedLength + " bytes but got " + actualLength + " bytes", null);
+ }
+ else {
+ callback.invoke(null, RNFetchBlobConst.RNFB_RESPONSE_PATH, this.destPath);
+ }
+ }
+ else {
+ callback.invoke(null, RNFetchBlobConst.RNFB_RESPONSE_PATH, this.destPath);
+ }
+ }
+ catch (Exception err) {
+ callback.invoke(err.getMessage());
+ err.printStackTrace();
+ }
  break;
  default:
  try {