Using WebRequest to POST parameters and data to TestFlight

Question

I'm trying to TestFlight's upload API to automate builds. Here's their documentation: https://testflightapp.com/api/doc/

This is the minimalist curl command-line request that I've tested and had working:

.\curl.exe http://testflightapp.com/api/builds.json 
  -F file=@MyFileName.ipa
  -F api_token='myapitoken' -F team_token='myteamtoken' 
  -F notes='curl test'

I've tried converting that into C# like this:

var uploadRequest = WebRequest.Create("http://testflightapp.com/api/builds.json") as HttpWebRequest;
uploadRequest.Method = "POST";
uploadRequest.ContentType = "multipart/form-data";

var postParameters = string.Format("api_token={0}&team_token={1}&notes=autobuild&file=", TESTFLIGHT_API_TOKEN, TESTFLIGHT_TEAM_TOKEN);
var byteParameters = Encoding.UTF8.GetBytes(postParameters);

var ipaData = File.ReadAllBytes(IPA_PATH);

uploadRequest.ContentLength = byteParameters.Length + ipaData.Length;
var requestStream = uploadRequest.GetRequestStream();
requestStream.Write(byteParameters, 0, byteParameters.Length);
requestStream.Write(ipaData, 0, ipaData.Length);
requestStream.Close();

var uploadResponse = uploadRequest.GetResponse();

Unfortunately at GetResponse() I get a (500) Internal Server Error and no more info.

I'm not sure if the data in my postParameters should be wrapped by 's or not -- I've tried it both ways. I also don't know if my content type is right. I've also tried application/x-www-form-urlencoded but that didn't have any effect.

Any help greatly appreciated.

This might help you http://stackoverflow.com/questions/219827/multipart-forms-from-c-sharp-client You need to distinguish the parts, since it is a multipart request — Adrian Iftode, May 08 '12 at 17:12
Thanks -- following your link trail took me to restsharp, http://restsharp.org/, which allowed me to implement the request in 13 whitespaced lines! — tenpn, May 09 '12 at 08:16

score 2 · Accepted Answer · edited May 23 '17 at 12:27

Thanks to Adrian Iftode's comment, I found RestSharp, which allowed me to implement the request like this:

var testflight = new RestClient("http://testflightapp.com");

var uploadRequest = new RestRequest("api/builds.json", Method.POST);

uploadRequest.AddParameter("api_token", TESTFLIGHT_API_TOKEN);
uploadRequest.AddParameter("team_token", TESTFLIGHT_TEAM_TOKEN);
uploadRequest.AddParameter("notes", "autobuild");

uploadRequest.AddFile("file", IPA_PATH);

var response = testflight.Execute(uploadRequest);
System.Diagnostics.Debug.Assert(response.StatusCode == HttpStatusCode.OK, 
            "Build not uploaded, testflight returned error " + response.StatusDescription);

If you're making a UI app, RestSharp can also do asyncronous execution. Check the docs at the link above!

Using WebRequest to POST parameters and data to TestFlight

1 Answers1