[Elphel-support] Elphel / C#
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Wed Oct 3 10:52:30 PDT 2012
Shane,
Thank you for the feedback on the camera image server (imgsrv - http://elphel.cvs.sourceforge.net/viewvc/elphel/elphel353-8.0/apps/web/imgsrv/imgsrv.c?view=markup ). It will be very helpful if you can isolate the exact problem that .NET "does not like" in the server response - I tried to make it standard and we never had problems with other client software.
I do not have .NET, so this is the server response I get with wget:
------------------------------------------
$ wget -S "http://192.168.0.12:8081/bimg"
--2012-10-03 11:00:26-- http://192.168.0.12:8081/bimg
Connecting to 192.168.0.12:8081... connected.
HTTP request sent, awaiting response...
HTTP/1.0 200 OK
Server: Elphel Imgsrv
Expires: 0
Pragma: no-cache
Content-Type: image/jpeg
Content-Disposition: inline; filename="elphelimg_229674.jpeg"
Content-Length: 230723
Length: 230723 (225K) [image/jpeg]
Saving to: `bimg'
100%[==================================================================================================================================================================>] 230,723 --.-K/s in 0.02s
2012-10-03 11:00:26 (9.25 MB/s) - `bimg' saved [230723/230723]
-----------------------------------------
Andrey
---- On Tue, 02 Oct 2012 19:23:04 -0700 <shane.sanford at concurrent.us> wrote ----
Thanks for the responses...
I did manage to fix the problem and thought I would report it here in case any one runs across it in the future.
The error seems to be using any .NET application in my case C#. Specifically when asking for the response from the camera
System.Net.WebResponse _WebResponse = _HttpWebRequest.GetResponse();
the following error is thrown "The server committed a protocol violation. Section=ResponseStatusLine".
After doing some research and trying multiple solutions it appears .NET has extremely strict expectations on header responses from the camera (could be a extra or missing space or captilization etc...). The following solution relaxes .NET header requirement for server responses
If added to the app.config, it would be:
1: <!-- after the applicationSettings --> 2: <system.net> 3: <settings> 4: <httpWebRequest useUnsafeHeaderParsing ="true"/> 5: </settings> 6: </system.net>
Now everything works as expected...
Shane
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