/// <summary>
/// Creates a call back with the API call args.
/// </summary>
/// <param name="e">The API call event</param>
protected virtual void OnAPICall(APICallEventArgs e)
{
if (APICall != null)
{
// Invokes the delegates.
APICall(this, e);
}
}
/// <summary>
/// Manage API call event.
/// </summary>
private void OnAPICall(object sender, APICallEventArgs e)
{
DebugTextBox.Text = "";
AppendText(DebugTextBox, "API Call:\n", Color.Brown, true);
AppendText(DebugTextBox, "Url: ", Color.DarkGreen, true);
AppendText(DebugTextBox, e.Url + "\n", Color.Blue, false);
AppendText(DebugTextBox, "Response: ", Color.DarkOrange, true);
AppendText(DebugTextBox, e.Response + "\n", Color.Blue, false);
}
/// <summary>
/// Creates a call back with the API call args.
/// </summary>
/// <param name="e">The API call event</param>
protected void OnAPICall(object sender, APICallEventArgs e)
{
// Fire this event to the next layer
if (APICall != null)
{
// Invokes the delegates.
APICall(this, e);
}
}
/// <summary>
/// Make an HTTP request, with the given query args
/// </summary>
private string MakeRequest(Uri url, HttpVerb httpVerb, List <KeyValuePair <string, string> > args, JSONObject body, ContentType contentType = ContentType.JSON)
{
// Prepare HTTP url
url = PrepareUrl(url, AccessToken, args);
// Set request
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = httpVerb.ToString();
if ((httpVerb == HttpVerb.POST) || (httpVerb == HttpVerb.PUT))
{
// Prepare HTTP body
string postData = EncodeBody(body, contentType);
ASCIIEncoding encoding = new ASCIIEncoding();
byte[] postDataBytes = encoding.GetBytes(postData);
// Set content type & length
if (contentType == ContentType.JSON)
{
request.ContentType = "application/json";
}
else
{
request.ContentType = "application/x-www-form-urlencoded";
}
request.ContentLength = postDataBytes.Length;
// Call API
Stream requestStream = request.GetRequestStream();
requestStream.Write(postDataBytes, 0, postDataBytes.Length);
requestStream.Close();
}
// Resolve the API response
try
{
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
// Read response data
StreamReader reader = new StreamReader(response.GetResponseStream());
string responseBody = reader.ReadToEnd();
// Throw the API call event
APICallEventArgs apiCallEvent = new APICallEventArgs();
if (body != null)
{
apiCallEvent.Body = body.ToString();
}
apiCallEvent.Response = responseBody;
apiCallEvent.Url = url.ToString();
OnAPICall(apiCallEvent);
// Return API response body
return(responseBody);
}
}
catch (WebException e)
{
JSONObject response = null;
try
{
// Try throwing a well-formed api error
Stream stream = e.Response.GetResponseStream();
StreamReader reader = new StreamReader(stream);
response = JSONObject.CreateFromString(reader.ReadToEnd().Trim());
int status = Convert.ToInt16(response.GetJSONStringAttribute("status"));
string error = response.GetJSONStringAttribute("error");
string message = response.GetJSONStringAttribute("message");
// optional: cause
string cause = "";
try
{
cause = response.Dictionary["cause"].Dictionary["message"].String;
}
catch
{ }
throw new RESTAPIException(status, error, message, cause);
}
catch (RESTAPIException restEx)
{
throw restEx; // this is a well-formed error message
}
catch
{
throw new RESTAPIException(999, e.Status.ToString(), e.Message); // this is not a well-formed message
}
}
}
