Merge pull request #3 from telia-oss/graphql-proxy-fix

Configure http client through context

backend/plugins/github_graphql/impl/impl.go

@@ -158,28 +158,28 @@ func (p GithubGraphql) PrepareTaskData(taskCtx plugin.TaskContext, options map[s
 	src := oauth2.StaticTokenSource(
 		&oauth2.Token{AccessToken: connection.GetToken()},
 	)
-	httpClient := oauth2.NewClient(taskCtx.GetContext(), src)
+
+	oauthContext := taskCtx.GetContext()
 	proxy := connection.GetProxy()
 	if proxy != "" {
 		pu, err := url.Parse(proxy)
 		if err != nil {
 			return nil, errors.Convert(err)
 		}
 		if pu.Scheme == "http" || pu.Scheme == "socks5" {
-			if oauthTransport, ok := httpClient.Transport.(*oauth2.Transport); ok {
-				if httpTransport, ok := oauthTransport.Base.(*http.Transport); ok {
-					httpTransport.Proxy = http.ProxyURL(pu)
-				} else {
-					return nil, errors.Default.New("unable to set proxy for oauth transport")
-				}
-			} else if httpTransport, ok := httpClient.Transport.(*http.Transport); ok {
-				httpTransport.Proxy = http.ProxyURL(pu)
-			} else {
-				return nil, errors.Default.New("unable to set proxy for http transport")
+			proxyClient := http.Client{
+				Transport: &http.Transport{Proxy: http.ProxyURL(pu)},
 			}
+			oauthContext = context.WithValue(
+				taskCtx.GetContext(),
+				oauth2.HTTPClient,
+				proxyClient,
+			)
 		}
 	}
 
+	httpClient := oauth2.NewClient(oauthContext, src)
+
 	endpoint, err := errors.Convert01(url.JoinPath(connection.Endpoint, `graphql`))
 	if err != nil {
 		return nil, errors.BadInput.Wrap(err, fmt.Sprintf("malformed connection endpoint supplied: %s", connection.Endpoint))