/// <summary>
/// Begins a async operation to get location info of the specified IP address.
/// </summary>
/// <param name="ip"></param>
/// <param name="proxy"></param>
/// <param name="callback"></param>
/// <param name="userState"></param>
/// <returns></returns>
/// <exception cref="System.ArgumentException"><paramref name="ip"/> not represents a valid IP address.</exception>
public static IAsyncResult BeginGetLocation(string ip, IWebProxy proxy, AsyncCallback callback, object userState)
{
HttpWebRequest request = CreateGetLocationRequest(ip, proxy);
AsyncResult <IEnumerable <string> > result = new AsyncResult <IEnumerable <string> >(callback, userState);
NetworkRequestAsyncTimeout.RegisterRequest(request.BeginGetResponse((ar) => {
IEnumerable <string> locations = null;
try {
locations = ParseGetLocationResponse(request, (HttpWebResponse)((HttpWebRequest)ar.AsyncState).EndGetResponse(ar));
} catch (Exception ex) {
result.MarkCompleted(ex, false);
return;
}
result.MarkCompleted(null, locations);
}, request), request, TIMEOUT);
return(result);
}
/// <summary>
/// Begins a async operation to post data to a HTTP resource.
/// </summary>
/// <param name="request">A HttpWebRequest object.</param>
/// <param name="serializer">A FormValuesSerializer object to serialize data to HTTP request stream.</param>
/// <param name="data">The data to post.</param>
/// <param name="name">If data is not complex type, use to name it.</param>
/// <param name="callback">The callback mehtod to invoke when async operation has completed.</param>
/// <param name="userState">A user specified data.</param>
/// <returns></returns>
/// <remarks>If you want to upload a file, <paramref name="data"/> must has a member of HttpPostingFile type.</remarks>
public static IAsyncResult BeginPostRequest(HttpWebRequest request, FormValuesSerializer serializer, object data, string name, AsyncCallback callback, object userState)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
string boundary = null;
serializer = serializer ?? new FormValuesSerializer();
bool needEncode = FormValuesSerializer.CheckEncodeRequirement(data);
AsyncResult <HttpWebResponse> result = new AsyncResult <HttpWebResponse>(callback, userState);
request.Method = WebRequestMethods.Http.Post;
if (needEncode)
{
request.ContentType = "application/x-www-form-urlencoded";
}
else
{
request.ContentType = string.Format("multipart/form-data; boundary={0}", boundary = GetRandomBoundary());
}
if (data != null)
{
NetworkRequestAsyncTimeout.RegisterRequest(request.BeginGetRequestStream((streamResult) => {
HttpWebRequest httpRequest = (HttpWebRequest)streamResult.AsyncState;
try {
using (Stream writer = httpRequest.EndGetRequestStream(streamResult)) {
if (needEncode)
{
serializer.Serialize(data, name, writer);
}
else
{
serializer.Serialize(data, name, boundary, writer);
}
}
NetworkRequestAsyncTimeout.RegisterRequest(httpRequest.BeginGetResponse((responseResult) => {
Exception exception = null;
HttpWebResponse response = null;
try {
response = (HttpWebResponse)((HttpWebRequest)responseResult.AsyncState).EndGetResponse(responseResult);
} catch (Exception ex) {
exception = ex;
}
result.MarkCompleted(exception, response);
}, httpRequest), httpRequest, httpRequest.Timeout);
} catch (WebException ex) {
result.MarkCompleted(ex, (HttpWebResponse)ex.Response);
} catch (Exception ex) {
result.MarkCompleted(ex);
}
}, request), request, request.Timeout);
}
else
{
//avoid sending 411 server error
request.ContentLength = 0;
NetworkRequestAsyncTimeout.RegisterRequest(request.BeginGetResponse((responseResult) => {
Exception exception = null;
HttpWebResponse response = null;
try {
response = (HttpWebResponse)((HttpWebRequest)responseResult.AsyncState).EndGetResponse(responseResult);
} catch (Exception ex) {
exception = ex;
}
result.MarkCompleted(exception, response);
}, request), request, request.Timeout);
}
return(result);
}
