title: URL generated by Firebase Storage does not allow access to the file
body: <p>I can't retrieve my images in Firebase Storage, when I try to access the Url of the image, shows this message: <em>"the X-Goog-Upload-Command header, which is not a valid X-Goog file"</em>. I can not access the files stored in Storage through the download URL. I ask for help, and the code bellow is how I'm uploading my files to the Storage and Database!</p>
  
  <pre><code>    if (pmcUri != null){
  
          // show the progress Dialog
          pmcProgress = new ProgressDialog(this);
          pmcProgress.setTitle("Creating your Feed");
          pmcProgress.setMessage("...");
          pmcProgress.show();
  
          final StorageReference mChildStorage = pmcStorage.child("feedPhotos")
                  .child(pmcUri.getLastPathSegment());
          mChildStorage.putFile(pmcUri).addOnSuccessListener(new OnSuccessListener&lt;UploadTask.TaskSnapshot&gt;() {
              @Override
              public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                  final Uri downloadUri = taskSnapshot.getUploadSessionUri();
  
                  FirebaseDatabase database = FirebaseDatabase.getInstance();
  
  
                  mChildStorage.getDownloadUrl();
                  // save infos in Database with user ID as a Reference
                  final DatabaseReference myRef = database.getReference("feeds").child(uid.getUid());
                  myRef.child("feed").setValue(setName);
                  assert downloadUri != null;
                  myRef.child("feedimg").setValue(downloadUri.toString());
                  myRef.child("feedkey").setValue(uid.getUid());
  
  
                  pmcProgress.dismiss();
  
                  Intent intent = new Intent(create_feed.this, glime.class);
                  startActivity(intent);
              }
          });
  
      }
  </code></pre>