Jira REST API Oauth signature invalid on POST, but GET has no problems

[Test Monkey]

I'm using DevDefined.Oauth to get my Oauth header. It works perfectly fine for my GET request, but when I use it for POST requests it returns oauth_problem=oauth_signature invalid.

private static String GetDevDefinedOauthHeader(String consumerKey, String consumerSecret, IToken accessToken, Uri requestUri, AsymmetricAlgorithm jKey, String restMethod)
{
OAuthConsumerContext consumerContext = new OAuthConsumerContext
{

ConsumerKey = consumerKey,
SignatureMethod = SignatureMethod.RsaSha1,
ConsumerSecret = consumerSecret,
UseHeaderForOAuthParameters = true,
Key = jKey
};

OAuthSession oSession = new OAuthSession(consumerContext)
{
AccessToken = new TokenBase
{
Token = accessToken.Token,
ConsumerKey = accessToken.ConsumerKey,
TokenSecret = accessToken.TokenSecret,
SessionHandle = accessToken.SessionHandle
}
};
IConsumerRequest consumerRequest = oSession.Request();
consumerRequest = ConsumerRequestExtensions.ForMethod(consumerRequest, restMethod);
consumerRequest = ConsumerRequestExtensions.ForUri(consumerRequest, requestUri);
consumerRequest = consumerRequest.SignWithToken();
 return consumerRequest.Context.GenerateOAuthParametersForHeader();
}

This is my GET request:

String oauthHeader = GetDevDefinedOauthHeader(consumerKey, consumerSecret, sessionAccessToken, new Uri(baseUrl + "/rest/api/latest/issue/" + issueKey), key, "GET");

 String newHeader = header.Split(' ')[1];

hClient.DefaultRequestHeaders.Accept.Clear();
hClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

hClient.SetAuthorization("OAuth", newHeader);

HttpResponseMessage response = await hClient.GetAsync("/rest/api/latest/issue/HW-1");

This is my POST request:

String oauthHeader = GetDevDefinedOauthHeader(consumerKey, consumerSecret, sessionAccessToken, new Uri(baseUrl + "/rest/api/latest/issue/" + issueKey), key, "POST");

 String newHeader = header.Split(' ')[1];

hClient.DefaultRequestHeaders.Accept.Clear();
hClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

hClient.SetAuthorization("OAuth", newHeader);

HttpResponseMessage response = await hClient.PostAsJsonAsync("/rest/api/latest/version", versionObject);

[Test Monkey]

UPADTE:

realized my issue was the url I was passing to the GetDevDefinedOauthHeader() method. It wasn't getting the right URL passed to it. So instead of baseUrl, I passed the baseUrl + endpointUrl and it worked like a charm.

[Ristei Georgian]

Hi,

Could please post here an example showing how the jKey is generated ?

Thank you.