Cannot add images when 'multiple images per item' is checked

[KoenHeye]

For testing purposes, I created a basic module with 2 fields (title and description) and checked 'multiple images per item' before generating the module.

I then installed the module on a clean Fork CMS 3.6.6 installation and tried adding an item with image.
Unfortunately the image doesn't seem to get uploaded at all. The page shows a javascript error:

[FineUploader] Error when attempting to parse xhr response text (SyntaxError: Unexpected token <) util.js:146
qq.log util.js:146
qq.FineUploaderBasic.log uploader.basic.js:120
qq.UploadHandler.log uploader.basic.js:254
parseResponse handler.xhr.js:215
onComplete handler.xhr.js:259
(anonymous function) handler.xhr.js:293

Ajax call that gets triggered: POST /backend/ajax.php?fork%5Bmodule%5D=basic_module&fork%5Baction%5D=upload&qqpartindex=0&qqpartbyteoffset=0&qqchunksize=637&qqtotalparts=1&qqtotalfilesize=637&qqfilename=secondarytile.png&qquuid=205660c6-700d-4363-b8ea-6f4aae19826b&qqfile=secondarytile.png HTTP/1.1

Note: In a module with a separate image field, the upload works. But I really need multiple images!

[WouterSioen]

Can you add the response of the ajax upload? In Google Chrome, you can find it by going to your network tab, and adding an image. A new entry should appear. If you click on it, you can choose too watch the response. This could help me a lot in debugging the source of the issue.

[KoenHeye]

Complete response: https://gist.github.com/KoenHeye/2f2b8e79b937d7b6aec6

A SpoonThumbnailException occurs
Trace: File C:\wamp\www\modulemaker366/backend\modules\basic_module\ajax\upload.php
Line 89
Class SpoonThumbnail
Function __construct
Argument(s)
array (size=3)
0 => string 'C:\wamp\www\modulemaker366\app/../frontend/files/basic_module/uploaded_images/source/1393537440851_57fbcfd3a4bbac8e44e2331aa63ab0e4.png' (length=135)
1 => int 100
2 => int 100

[WouterSioen]

Thx, I'll look at it this weekend.

[WouterSioen]

@KoenHeye I can't reproduce this on my machine. Is the image you sent smaller then 100x100 pixels?

It could also be a Windows issue. Have you ever had trouble with SpoonThumbnail on a Windows machine?

[KoenHeye]

Hello @WouterSioen, I just found some time to do more tests. So my apologies for the late response.
Images are not smaller than 100x100px. It will definitely be a Windows issue (I haven't used SpoonThumbnail before).

The response mentioned previously, was for a file of 40kb. When uploading a larger file (> 1MB), I got the response: {"error":"Server error. Uploads directory isn't writable or executable.","num":6,"index":0}

I checked out possible access restrictions on the uploads directory frontend\files\basic_module but everything looked ok.

I noticed that the error gets generated in qqFileUploader.php (library\external\qqFileUploader.php).
The method is_writable($uploadDirectory) and is_writable($chunksFolder) are used. But it seems that that method is unreliable in Windows environments: http://stackoverflow.com/questions/15888673/fine-uploader-implementation

Perhaps use another version for the qqFileUploader.php: https://github.com/Widen/fine-uploader-server/blob/master/php/traditional/handler.php
Check out the comment of the method isInaccessible.

I'll test this out in my Windows environment.