HttpClient, the server committed a protocol violation Section = ResponseHeader Detail = CR must follow LF
I am using HttpClient to communicate with my GoPro camera over Wi-Fi, but I am getting the following error. " The server has detected a protocol violation. The = ResponseHeader Detail = CR section must be followed by an LF " Although I have notified them, I cannot change the GoPro web server, so I need to allow / ignore this on the client side. When I make this call using Fiddler as a proxy, Fiddler fixes the problem and my application works as expected. But without the fiddler, I get a protocol violation message.
From a search I did, it can be solved by adding <httpWebRequest useUnsafeHeaderParsing = "true"/>
(see HttpWebRequestElement.UseUnsafeHeaderParsing Property ), but this is Windows 8 and no config file.
One option is to write a custom handler and inject it into the HttpClient ctor, but I'm not sure where to start with my own handler, and this seems like a lot of effort to be inlined.
Is there a simple solution?
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I haven't tried it myself, but maybe you can change the item by code like this http://social.msdn.microsoft.com/Forums/en-US/ff098248-551c-4da9-8ba5-358a9f8ccc57/how-do- i-enable-useunsafeheaderparsing-from-code-net-20
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Unfortunately, writing your own handler doesn't work either because the system HttpClientHandler
is called before your custom handler when the response is returned.
For Windows Store apps, you can use MessageWebSocket
: I tried something similar for Windows Phone 8.1 Silverlight using StreamSocket
; see How can I accept "insecure" HTTP response headers in a Windows Phone / Store app?
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