Protocol Violation Exception

[abarrafo]

There is one problem with the sample application at CSharp.GitHub / CSharp.GitHub.MVC 3 Example / Controllers / GitHubController.cs:

if (accessGrant != null)
        {
            //Until explict GitHub endpoints have API bindings, the following
            //method can be employed to consume GitHub endpoints
            var gitHubClient = _gitHubProvider.GetApi(accessGrant.AccessToken);
            var result = gitHubClient.RestOperations.GetForObject<JsonValue>("https://api.github.com/user/repos");

            ViewBag.AccessToken = accessGrant.AccessToken;
            ViewBag.ResultText = result.ToString();

            return View();
        }

This is throwing the following Exception:

"System.Net.WebException: The server committed a protocol violation. Section=ResponseStatusLine"

This is happening because GitHub requires a User-Agent header along with the request. To solve this problem is very easy.

1. I upgraded to the latest Spring.Social.Core package, which is 4.3.0 as of this writing.

2. I then modified the above code to an exchange() rather than a GetForObject()

       if(accessGrant != null)
       {
           HttpHeaders headers = new HttpHeaders();
           headers.Set("User-Agent", "{Some agent name}");
           HttpEntity entity = new HttpEntity(headers);
           var gitHubClient = _gitHubProvider.GetApi(accessGrant.AccessToken);
           var result = gitHubClient.RestOperations.Exchange<JsonValue>("https://api.github.com/user", HttpMethod.GET, entity);
           ViewBag.AccessToken = accessGrant.AccessToken;
           ViewBag.ResultText = result.ToString();
   
           return View();
   
       }