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#54 Expect: 100-continue header results in 417 Error with proxy
open-fixed
7
2009-01-06
2008-09-08
No
Our ISP Melsa Net proxy rejects HTTP POST request by SyncEvolution that contains "Expect: 100-continue" by returning 417 Expectation Failed.
Please remove this "Expect" header.
See for more info:
http://curl.haxx.se/mail/archive-2005-11/0129.html
That'll have to be be changed in the client library. I can bring it up and provide a patch, but Funambol is currently migrating their source code to SVN. It'll be a while before I can release an update (perhaps a month from now).
Okey... let me know if I can help.
Information:
Ubuntu 8.04.1
Evolution 2.22
SyncEvolution 0.8
Our company proxy (squid 2.7) also produce 417 error on "Expect: 100-continue"
I can't sync my contacts :(
I have a patch for this and will it use in the upcoming 0.8.1 (if all goes well, due this week or the next).
The patch currently is here:
http://github.com/pohly/funambol-cpp-client-api/commit/a42b7f79dc720ad2becdb760f413c033366c2a00
Patch also included upstream.
Hi,
I installed the latest SyncEvolution deb package from http://www.estamos.de/download/apt (Package syncevolution-evolution, version 1:0.8.1-2) but I think I am still seeing this error. I'm running Ubuntu Intrepid.
$ syncevolution --version
SyncEvolution 0.8.1
using libedataserver-1.2.so.11
using libebook-1.2.so.9
using libecal-1.2.so.7
My client.log shows the following:
...
[DEBUG] header out: User-Agent: SyncEvolution
[DEBUG] header out: Host: [snip]
[DEBUG] header out: Accept: */*
[DEBUG] header out: Content-Type: application/vnd.syncml+xml
[DEBUG] header out: Content-Length: 2019
[DEBUG] header out: Expect: 100-continue
[DEBUG] header out:
20:57:05 GMT [DEBUG] header in: HTTP/1.1 417 Expectation Failed
20:57:05 GMT [DEBUG] header in: Connection: close
20:57:05 GMT [DEBUG] header in: Content-Length: 0
20:57:05 GMT [DEBUG] header in: Date: Thu, 01 Jan 2009 20:57:05 GMT
20:57:05 GMT [DEBUG] header in: Server: lighttpd/1.4.18
20:57:05 GMT [DEBUG] header in:
20:57:05 GMT [DEBUG] libcurl info: Closing connection #0
...
Do I need to install from source to get the fix for this? I took a look at the source for syncevolution-0.8.1 and the file src/client-api/src/c++/posix/http/CurlTransportAgent.cpp still has a reference to the Expect header in line 81:
slist = curl_slist_append(NULL, "Expect:");
Any ideas?
Richard
> I took a look
> at the source for syncevolution-0.8.1 and the file
> src/client-api/src/c++/posix/http/CurlTransportAgent.cpp still has a
> reference to the Expect header in line 81:
> slist = curl_slist_append(NULL, "Expect:");
That is the fix. Listing the value explicitly with no value suppresses generating the "Expect: 100". It worked with libcurl 7.15.5-1etch1 (Debian Etch), but now that you have mentioned it, I also checked with libcurl7.18.0-1ubuntu2 (Ubuntu 8.04) and there I can reproduce that the problem is back.
I need to check whether that is a regression in libcurl and how this can be worked around.
I'm no longer sure whether the "fix" ever worked. The explicit "Expect:" header was overwritten later on. I fixed the issue properly this time around. Not sure why I missed it when testing the first patch - sorry! :-/
Richard, I'm not sure when I'll be able to put out new binaries. In the meantime please compile from source after applying the attached patch: in the src/client-api directory use "patch -p1 < 'name of patch file'"
File Added: curl-expect-II.patch
Awesome, that's fixed it for me. I thought it made more sense to set the header values in sendMessage() than in the constructor. Thanks for the quick fix.