Why does a pdf file download result in varying bytes logged, all with sc-status 200

Posted by Pat James on Server Fault See other posts from Server Fault or by Pat James
Published on 2010-04-14T05:25:05Z Indexed on 2010/04/14 5:33 UTC
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I have a mojoportal CMS installation on an IIS7 server where users are reporting problems downloading a pdf file. It always downloads fine for me and most others, either displaying in browser or in Adobe Reader.

Using logparser to query the IIS logs, all the responses are status 200 (OK) or 304 (Not modified), but the bytes sent vary quite a bit. Sometimes zero, some 211, some about half the full file size of 27059, and lots in between. Plenty show the full size of 27059.

Do these other entries for smaller byte counts represent errors of some kind, correlating with the problems reported? Is this likely to be a browser/client issue or a server side problem?

If there is any other info that would be helpful let me know. This is a shared hosting server though so I am somewhat limited in what I can dig into on the server.

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