Browser download complete event
We\'ve been looking for a while for an answer to this, but haven\'t found a solution.
We have a web server, which allows the user to download files (pdfs), which a
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User cancelling can sometimes be detected in a servlet. Using Tomcat for example, try to stream a large file to the client, and then cancel the download. You can see the stacktrace of the exception in logs/catalona.out. I'm not sure, however, that this can be handled in servlet itself or a lower level (inside catalina).
There is a preloading approach (sure with event listener facility) usually used to download images. It's up to the browser to download the whole PDF or not if it detects it as an unsupported image, but it worths giving a try. Here is an example.
Another solution would be to implicitly download the PDF using
ortags, and using their onload event listener. Not that this only works if an ActiveX or some sort of PDF file association is done in the browser, and probably won't work if user doesn't have a PDF viewer. Here is an example demonstrating this (see assisted solution: 11/21/04 08:22 AM, ID: 12638846).Mohsen
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