2009/2/15 Aryeh Gregor <[email protected]<simetrical%[email protected]> >
> On Sat, Feb 14, 2009 at 12:04 PM, Tar Dániel <[email protected]> wrote: > > I'm maintaining many bots on Hungarian Wikipedia, they are written in C# > > using DotNetWikiBot. > > Lately I randomly get 417 errors from the server (for example at login, > at > > saving pages). If I repeat the request caused 417 again a sec later, it > > probably works. (Formerly there were no problems at all.) The problem > exists > > using cable connection at home, and the university's network. > > I haven't found any useful information about 417 on the net, how to avoid > > it. > > AFAIK, a new version of Squid is partially rolled out, and this new > version appears to reject Expect headers. From the HTTP/1.1 standard: > > "A server that does not understand or is unable to comply with any of > the expectation values in the Expect field of a request MUST respond > with appropriate error status. The server MUST respond with a 417 > (Expectation Failed) status if any of the expectations cannot be met > or, if there are other problems with the request, some other 4xx > status. > > "This header field is defined with extensible syntax to allow for > future extensions. If a server receives a request containing an Expect > field that includes an expectation-extension that it does not support, > it MUST respond with a 417 (Expectation Failed) status. " > > It might be something like: Squid doesn't understand any Expect > headers, so the new version returns 417 errors whenever an Expect > header is sent. Stop sending Expect headers and the problem will go > away. > After your great description, I've found the answer (it sended 100-continue expectation in the header, I had to change the ProtocolVersion to prevent this). I'll contact the author of DotNetWikiBot with the fix. Thanks again! Dani _______________________________________________ Wikitech-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikitech-l
