PHP文件上传无法使用超过65KB

Question

I have a VB.NET software that uploads files using an HTTP request to PHP. This worked fine until May but now it fails when uploading files over 65KB. I can not tell when it stops to work exactly. Even though, I don't think it is relevant. So to be clear, uploading a file under 65KB works correctly.

I looked with my hoster and he doesn't see any error neither do I on the server (the part I have access). VB.NET doesn't give me a pertinent error, but using WireShark, I've been able to get either a 500 or a 400 error. But it didn't give me clues on what is failing.

I verified this question which is not solved, though the things said there are OK on the server too. PHP not uploading file over 55 kb

I have another option to fix it: splitting my files in chunks of 50KB and rejoining them via PHP. Though, I rather understand what is happening because this can happen again even with chunks of 50KB.

Server is Apache/2.4.28 (Unix)

EDIT 1 I have new conditions: I now have my own server running on Windows + Apache 2.4 + PHP 5.6.

Now it goes a little farther. I have an error when using move_uploaded_file function that gives me: Error #3: The uploaded file was only partially uploaded. It is coherent with the file being stopped to be sent near the end. So I now receive an HTTP 200 response but a failure after ward even though I suspect not being there.

• I can certify I did not stop my VB.NET software that is uploading the file.
• I tested changing KeepAlive to Off/False on both sides. No luck :(
• Tried to add header ("Connection: close"); in my main file (that is used for all transactions with this VB.NET software). No luck.
• Even though, it is not currently an issue, I changed (PHP configs) the upload_max_filesize to 256M and post_max_size to 300M (because it will be a problem if a can figure out this one).

I got those suggestions from : https://wordpress.stackexchange.com/questions/176465/failed-media-upload-the-uploaded-file-was-only-partially-uploaded

The only one I could not try is replacing an apache/php module which doesn't seem to exist on Windows.

Answer 1

Depending on your server's configuration, when an error 500 is returned an error_log is written. The problem is with the error 400. Which according to wikipedia's list of HTTP codes is actually a BAD REQUEST . Some output from your error_log when the attempt is being made might put us in the right direction.