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  

Answer 7

its work for me
great thank you

Answer 8

Thanks for this worked for me also. What I don't understand is why this is necessary when I've not changed my proxy settings in any way whatsoever...? Is it possibly due to a Windows patch, I'm still on good old WinXP SP3.

Anyway thanks for the assistance. Rob

Answer 9

Thanks for the answer. Its worked fine

Answer 10

thanks a lot, this solved the error still confuse about working. well  at least working

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Sachin Kalra

Answer 11

Thanks for the answer. Its worked fine

Answer 12

Hi. I added these lines to the web.config of my WCF project but the services still give me the 417 protocol error.

Answer 13

Hi Saurabh,

I have tried above solution and also tried to modify devenv.exe.config file with:

<defaultProxy useDefaultCredentials="true" enabled="true">         
   <proxy usesystemdefault="True" />       
  </defaultProxy>

For my problems I do not see either of them are working. I am using VS2010 SP1 REL on Windows7. I am facing similar two issues:

1) Could not search in online Galary in Extension Manage, error says "Cannot search for online extensions becuase an error occured while trying to contact the server.", though I am on firewall with restrictions enforced by windows authentication.

2) On the Start Page (VS2010) in Latest News section, I amnot able to browse on of the RSS feed. I have alos check with different RSS provided on asp.net website. also I have tried setting up diffrent options in Tools-Options-Environment-Startup etc. but no luck.

I hope to hear from you soon. Thanks!

 

Answer 14

KB 910804 explains where to find the dexplore.exe.config file, although it doesn't seem to know about 64-bit versions, so the path may need appropriate changes to compensate for this.

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Answering policy: see profile.

Answer 15

For Visual Studio 2008, the file you must change is the devenv.exe.config - then insert the <servicePointManager expect100Continue="false" /> under the <system.net> and <settings> tags.