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Dan
Asked: 2010-02-23 16:16:45 +0800 CST

How do I upload large (30MB) files via a web interface?

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Because I'm stumped...

The client needs to be able to upload large images to a library but the upload fails after 5-6MB (over my poor connection). It seems to be timing out as the filesize at fail isn't consistent.

The setup is a form which is accepted by PHP. I've googled and played with php.ini and everything is set for big uploads and long timeouts. Platform is a dedicated windows server at GoDaddy.

What's going wrong?

php upload iis php.ini

3 Answers

  1. Ensure these two settings in PHP are set:

    • upload_max_filesize - should be a little larger then the biggest file you expect
    • post_max_size - this needs to be larger then upload_max_filesize
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  2. Problem solved!

    After TWO YEARS of on-and-off wrestling with this server I discovered that the app pool was set to time out at 5 minutes. Now I get a 500 error when the file finishes but I'm better equipped to deal with that.

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  3. Dpeending on what version of windows you are running (IIS 7), you may also need to adjust the request filtering module.

    By default it cuts off at 5 MB or so. To change open an administrative command prompt:

    C:\Windows\System32\inetsrv>appcmd set config -section:requestFiltering -requestLimits.maxAllowedContentLength:1048576

    The size is in bytes.

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