public IAsyncResult BeginQuery(string query, AsyncCallback callback, object state)
{
string uri = ConstructQueryUri(query);
HttpWebRequest req = WebRequest.Create(uri) as HttpWebRequest;
req.Accept = "application/json";
ADResult fbResult = new ADResult(state);
fbResult.InnerResult = req.BeginGetResponse(
(result) =>
{
if (callback != null)
callback(fbResult);
},
req);
return fbResult;
}
public IAsyncResult BeginQuery(string query, AsyncCallback callback, object state)
{
string uri = ConstructQueryUri(query);
HttpWebRequest req = WebRequest.Create(uri) as HttpWebRequest;
req.Accept = "application/json";
ADResult fbResult = new ADResult(state);
fbResult.InnerResult = req.BeginGetResponse(
(result) =>
{
if (callback != null)
{
callback(fbResult);
}
},
req);
return(fbResult);
}
public IEnumerable <ADQueryResult> EndQuery(IAsyncResult result)
{
if (!result.IsCompleted)
{
result.AsyncWaitHandle.WaitOne();
}
ADResult fbResult = result as ADResult;
if (fbResult == null)
{
throw new ArgumentException(InvalidAsyncResult, "result");
}
WebRequest req = fbResult.InnerResult.AsyncState as WebRequest;
if (req == null)
{
throw new ArgumentException(InvalidAsyncResult, "result");
}
JObject jObject = null;
try
{
using (WebResponse resp = req.EndGetResponse(fbResult.InnerResult))
using (Stream stream = resp.GetResponseStream())
using (StreamReader reader = new StreamReader(stream))
{
string json = reader.ReadToEnd();
jObject = JObject.Parse(json);
}
}
catch (WebException ex)
{
// if this is a web exception (400 or 500 HTTP status codes), try
// to retrieve any error messages in the json payload
HttpWebResponse response = ex.Response as HttpWebResponse;
if (response != null)
{
if (response.ContentType.ToLower().Contains("json"))
{
using (Stream stream = response.GetResponseStream())
using (StreamReader reader = new StreamReader(stream))
{
string json = reader.ReadToEnd();
jObject = JObject.Parse(json);
}
}
else
{
throw;
}
}
else
{
throw;
}
}
var errors = jObject["error"] as JObject;
if (errors != null)
{
string message = errors.ToString();
int errorCode = 0;
int.TryParse(errors.Value <string>("code"), out errorCode);
switch (errorCode)
{
case 190:
message = "Facebook authentication failed - need to renew token";
break;
case 1190:
message = "Directory authentication failed - need to renew token";
break;
}
throw new ApplicationException(
String.Format(
"AD Graph service errors were returned: message: {0}; code: {1}",
message,
errorCode),
new ApplicationException(errorCode.ToString()));
}
var d = jObject["d"] as JObject;
var data = d["results"] as JArray;
if (data != null)
{
foreach (var queryResult in data)
{
var jobjResult = queryResult as JObject;
yield return(new ADQueryResult(jobjResult));
}
}
}