void FetchJSON(HttpsRequest request, Action<JsonValue> completion, Action<Exception> errorHandler, CancellationToken token)
{
var op = System.ComponentModel.AsyncOperationManager.CreateOperation(null);
request.UserAgent = "FlashcardsWP7/0.1 (" + Environment.OSVersion + "; .NET " + Environment.Version + ")";
try {
token.Register(delegate { throw new OperationCanceledException(); });
ThreadPool.QueueUserWorkItem(
_ => {
Exception error;
try {
var client = new HttpsClient(Host.Host, Host.Port, Configuration.VerifyCertificates);
var response = client.MakeRequest(request);
var text = response.DecodeTextBody();
if (response.StatusCode == 204) {
op.PostOperationCompleted(delegate { completion(null); }, null);
return;
}
var json = JsonValue.Parse(new StringReader(text));
if (response.StatusCode / 100 != 2) {
var dict = (JsonDictionary) json;
var errorCode = new JsonContext().FromJson<string>(dict.Items["error"]);
var errorText = new JsonContext().FromJson<string>(dict.Items["error_description"]);
if (errorCode != null && errorText != null) {
// TODO: find error code for needing password
if (errorCode == "invalid_access")
throw new AccessDeniedException(errorText);
if (errorCode == "item_not_found")
throw new ItemNotFoundException(errorText);
if (errorCode == "item_deleted")
throw new ItemDeletedException(errorText);
throw new QuizletException(errorText);
}
throw new QuizletException("The Quizlet request failed (HTTP error " + response.StatusCode.ToString(CultureInfo.InvariantCulture) + ").");
}
op.PostOperationCompleted(delegate { completion(json); }, null);
return;
}
catch (QuizletException e) {
error = e;
}
catch (OperationCanceledException e) {
error = e;
}
catch (HttpException e) {
error = e;
}
catch (System.Net.Sockets.SocketException e) {
error = e;
}
catch (IOException e) {
error = e;
}
catch (ArgumentException e) {
error = e;
}
catch (InvalidOperationException e) {
error = e;
}
catch (NotSupportedException e) {
error = e;
}
catch (FormatException e) {
error = new QuizletException("The Quizlet server returned an invalid document.", e);
}
catch (JsonConvertException e) {
error = new QuizletException("The Quizlet server returned an invalid document.", e);
}
catch (InvalidCastException e) {
error = new QuizletException("The Quizlet server returned an invalid document.", e);
}
catch (KeyNotFoundException e) {
error = new QuizletException("The Quizlet server returned an invalid document.", e);
}
op.PostOperationCompleted(delegate { errorHandler(error); }, null);
});
} catch (OperationCanceledException e) {
errorHandler(e);
}
}
void FetchJSON(HttpsRequest request, Action <JsonValue> completion, Action <Exception> errorHandler, CancellationToken token)
{
var op = System.ComponentModel.AsyncOperationManager.CreateOperation(null);
request.UserAgent = "FlashcardsWP7/0.1 (" + Environment.OSVersion + "; .NET " + Environment.Version + ")";
try {
token.Register(delegate { throw new OperationCanceledException(); });
ThreadPool.QueueUserWorkItem(
_ => {
Exception error;
try {
var client = new HttpsClient(Host.Host, Host.Port, Configuration.VerifyCertificates);
var response = client.MakeRequest(request);
var text = response.DecodeTextBody();
if (response.StatusCode == 204)
{
op.PostOperationCompleted(delegate { completion(null); }, null);
return;
}
var json = JsonValue.Parse(new StringReader(text));
if (response.StatusCode / 100 != 2)
{
var dict = (JsonDictionary)json;
var errorCode = new JsonContext().FromJson <string>(dict.Items["error"]);
var errorText = new JsonContext().FromJson <string>(dict.Items["error_description"]);
if (errorCode != null && errorText != null)
{
// TODO: find error code for needing password
if (errorCode == "invalid_access")
{
throw new AccessDeniedException(errorText);
}
if (errorCode == "item_not_found")
{
throw new ItemNotFoundException(errorText);
}
if (errorCode == "item_deleted")
{
throw new ItemDeletedException(errorText);
}
throw new QuizletException(errorText);
}
throw new QuizletException("The Quizlet request failed (HTTP error " + response.StatusCode.ToString(CultureInfo.InvariantCulture) + ").");
}
op.PostOperationCompleted(delegate { completion(json); }, null);
return;
}
catch (QuizletException e) {
error = e;
}
catch (OperationCanceledException e) {
error = e;
}
catch (HttpException e) {
error = e;
}
catch (System.Net.Sockets.SocketException e) {
error = e;
}
catch (IOException e) {
error = e;
}
catch (ArgumentException e) {
error = e;
}
catch (InvalidOperationException e) {
error = e;
}
catch (NotSupportedException e) {
error = e;
}
catch (FormatException e) {
error = new QuizletException("The Quizlet server returned an invalid document.", e);
}
catch (JsonConvertException e) {
error = new QuizletException("The Quizlet server returned an invalid document.", e);
}
catch (InvalidCastException e) {
error = new QuizletException("The Quizlet server returned an invalid document.", e);
}
catch (KeyNotFoundException e) {
error = new QuizletException("The Quizlet server returned an invalid document.", e);
}
op.PostOperationCompleted(delegate { errorHandler(error); }, null);
});
} catch (OperationCanceledException e) {
errorHandler(e);
}
}
