Originally from: http://nahidulkibria.blogspot.com/2009/06/how-to-fix-wcf-error-remote-server.html
Few day’s ago one of our project(using wpf and wcf ) going live and we are start getting lots of weird error one of is 417 the remote server return unexpected response.
after some investigation and we found its only occur when client are behind a proxy in our case its squid(http://www.squid-cache.org/) and has a configuration like following in squid.conf
#This option makes Squid ignore any Expect: 100-continue header present
#in the request. Note: Enabling this is a HTTP protocol violation, but some #client may not handle it well.. #Default:
ignore_expect_100 off
we are solving this problem can be solved by changing squid configuration
ignore_expect_100 on
the following settings on the app.config also solved the problem
but if you have control over your proxy server settings change that. if you do not have chance to change proxy settings and handle this with changing app.config may be facing problem upload large amount of file
for more information you can check this
http://msdn.microsoft.com/en-us/library/system.net.servicepointmanager.expect100continue.aspx
0 Responses
Stay in touch with the conversation, subscribe to the RSS feed for comments on this post.