HTTP Status 417: Expectation Failed

Question

Hi,

Hope someone knows the solution to this problem as it's driving me insane !

I have Visual Studio Pro 2005 installed.  I do NOT have the local MSDN installed.   I want to use online version only.

Whenver I go to the help I get "Information not found".   Document explorer is configured to use "Online first, then local".

If I hit the search button and enter a search string I get the error message below:
Search Failed.
The request failed with HTTP Status 417: Expectation failed.

If I try to 'download provider list' in the help options I get error message :
Unable to retrieve resources from the MSDN service.

The start page loads the MSDN without problem - as does my web browser.

I have proxy configuration script - have tried some suggestions on here for that but they don't seem to be related to this error message.

Any ideas anyone ??

Answer 1

I am experiencing the same problem. If you find a solution, please let me know.

Answer 2

Can you describe your proxy environment, i.e. whether it is ISA or Squid or something else? Also, does it require authentication when browsing in IE?

--
Regards,
Saurabh

Answer 3

Researching on the internet, it seems that some ad-blocking/SOAP blocking proxies result in the HTTP 417 errors. Following is an example of it.

http://support.sourcegear.com/viewtopic.php?p=373#373

Is it possible that proxies you are using are using one of blocking mechanisms? Help Search using Web Service calls and will fail if SOAP message is blocked.

--
Regards,
Saurabh

 

Answer 4

Hi,

It seems that this error can also occur on some proxies that don't support "100 continue" expectation. The workaround is to add the following to the dexplore.exe.config file.

<configuration>

<system.net>

<settings>

            <servicePointManager expect100Continue="false" />

</settings>

</system.net>

</configuration>

 

--

Regards,

Saurabh

Answer 5

That works perfectly!   Many thaks again Saurabh.

Answer 6

Now my MSDN C# 2005 Explorer is faster.

But I cannot download the provider list. A messagebox displays : "Error getting Codezone Community sites. Configuration Sytsem Failed to inizialize."

 

Help me