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  • Checking for an incomplete multipart upload?

    I've been implementing an upload feature which is driven by a third party applet to provide an easy way to upload multiple files. One thing I have come across is that as the applet has a "Cancel" button, a user can easily stop a post midway through and the Commons resolver will successfully parse the incomplete submission without a murmur. This could very well be because the applet is "tidying up" the interrupted post.

    The content-length will of course be wrong, but this doesn't appear to matter to FileUpload.

    The result is a set of files with one truncated at the point the cancellation occurred. Obviously I might need to speak with the Applet maintainer, but I was curious if there were servlet solution.

    My first thought was comparing the resulting uploaded data against the content-length, but this feels like a very brittle approach. For one thing, content-length != sum of file sizes, but also includes extraneous fields which do not have a rigid format.

    What would you reccomend I request the maintainer of the applet do to have a robust method? Perhaps cancel should elicit another get or post which just informs the server of the user event?

  • #2
    Sorry, this is an old post... have you resolved the issue yet? What are you trying to do with the information? Database? Store a picture?

    Let me know if you still need help

    Steve O