WebPositive has trouble with attachments

[andrew.pennebaker@…]

I'm trying to upload an attachment to GHC Trac (​http://hackage.haskell.org/trac/ghc/) using Haiku OS's (​http://www.haiku-os.org/) web browser, WebPositive (​http://webpositive.haiku-os.org/).

On the GHC Trac, when I upload an attachment, I get an error popup about serialized data, but the upload is actually successful. Since I got an error message, I tried the upload again and ended up with two duplicate attachments. GHC Trac uses Trac 0.11.6.

On the Trac 0.12 demo page (​http://trac.edgewall.org/demo-0.12), I wanted to find out if GHC Trac's configuration was to blame, or if the problem was limited to Trac/WebPositive.

It looks like Trac and/or WebPositive are to blame: when I try to upload an attachment to the Trac 0.12 demo with WebPositive, I don't see an error message, just a blank page, and forcibly revisiting the ticket page, I find there is no attachment listed.

[Remy Blank]

Can you please provide the exact error message you get, and if possible the headers sent by the browser and the headers returned by the server?

I see your requests in the logs of the demo demo-0.12 instance, and the requests for adding an attachment result in an error "417 Expectation Failed", which means:

The expectation given in an Expect request-header field (see ​section 14.20) could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could not be met by the next-hop server.

So the Expect: header sent by your browser would be particularly interesting. I assume the browser is trying to use "100-continue" before sending the whole attachment body, and our server probably doesn't support that.

[Christian Boos]

no feedback, closing.