175 lines
7.0 KiB
C#
175 lines
7.0 KiB
C#
/*
|
|
* Copyright (c) Contributors, http://opensimulator.org/
|
|
* See CONTRIBUTORS.TXT for a full list of copyright holders.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of the OpenSimulator Project nor the
|
|
* names of its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
using System;
|
|
using System.IO;
|
|
using System.Net;
|
|
using System.Reflection;
|
|
using System.Text;
|
|
using System.Xml;
|
|
using System.Xml.Serialization;
|
|
using log4net;
|
|
|
|
namespace OpenSim.Framework.Servers.HttpServer
|
|
{
|
|
public class AsynchronousRestObjectRequester
|
|
{
|
|
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
|
|
|
|
/// <summary>
|
|
/// Perform an asynchronous REST request.
|
|
/// </summary>
|
|
/// <param name="verb">GET or POST</param>
|
|
/// <param name="requestUrl"></param>
|
|
/// <param name="obj"></param>
|
|
/// <param name="action"></param>
|
|
/// <returns></returns>
|
|
///
|
|
/// <exception cref="System.Net.WebException">Thrown if we encounter a
|
|
/// network issue while posting the request. You'll want to make
|
|
/// sure you deal with this as they're not uncommon</exception>
|
|
//
|
|
public static void MakeRequest<TRequest, TResponse>(string verb,
|
|
string requestUrl, TRequest obj, Action<TResponse> action)
|
|
{
|
|
// m_log.DebugFormat("[ASYNC REQUEST]: Starting {0} {1}", verb, requestUrl);
|
|
|
|
Type type = typeof (TRequest);
|
|
|
|
WebRequest request = WebRequest.Create(requestUrl);
|
|
WebResponse response = null;
|
|
TResponse deserial = default(TResponse);
|
|
XmlSerializer deserializer = new XmlSerializer(typeof (TResponse));
|
|
|
|
request.Method = verb;
|
|
|
|
if (verb == "POST")
|
|
{
|
|
request.ContentType = "text/xml";
|
|
|
|
MemoryStream buffer = new MemoryStream();
|
|
|
|
XmlWriterSettings settings = new XmlWriterSettings();
|
|
settings.Encoding = Encoding.UTF8;
|
|
|
|
using (XmlWriter writer = XmlWriter.Create(buffer, settings))
|
|
{
|
|
XmlSerializer serializer = new XmlSerializer(type);
|
|
serializer.Serialize(writer, obj);
|
|
writer.Flush();
|
|
}
|
|
|
|
int length = (int) buffer.Length;
|
|
request.ContentLength = length;
|
|
|
|
request.BeginGetRequestStream(delegate(IAsyncResult res)
|
|
{
|
|
Stream requestStream = request.EndGetRequestStream(res);
|
|
|
|
requestStream.Write(buffer.ToArray(), 0, length);
|
|
|
|
request.BeginGetResponse(delegate(IAsyncResult ar)
|
|
{
|
|
response = request.EndGetResponse(ar);
|
|
|
|
try
|
|
{
|
|
deserial = (TResponse) deserializer.Deserialize(
|
|
response.GetResponseStream());
|
|
}
|
|
catch (System.InvalidOperationException)
|
|
{
|
|
}
|
|
|
|
action(deserial);
|
|
}, null);
|
|
}, null);
|
|
|
|
return;
|
|
}
|
|
|
|
request.BeginGetResponse(delegate(IAsyncResult res2)
|
|
{
|
|
try
|
|
{
|
|
// If the server returns a 404, this appears to trigger a System.Net.WebException even though that isn't
|
|
// documented in MSDN
|
|
response = request.EndGetResponse(res2);
|
|
|
|
try
|
|
{
|
|
deserial = (TResponse)deserializer.Deserialize(response.GetResponseStream());
|
|
}
|
|
catch (System.InvalidOperationException)
|
|
{
|
|
}
|
|
}
|
|
catch (WebException e)
|
|
{
|
|
if (e.Status == WebExceptionStatus.ProtocolError)
|
|
{
|
|
if (e.Response is HttpWebResponse)
|
|
{
|
|
HttpWebResponse httpResponse = (HttpWebResponse)e.Response;
|
|
|
|
if (httpResponse.StatusCode != HttpStatusCode.NotFound)
|
|
{
|
|
// We don't appear to be handling any other status codes, so log these feailures to that
|
|
// people don't spend unnecessary hours hunting phantom bugs.
|
|
m_log.DebugFormat(
|
|
"[ASYNC REQUEST]: Request {0} {1} failed with unexpected status code {2}",
|
|
verb, requestUrl, httpResponse.StatusCode);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m_log.ErrorFormat("[ASYNC REQUEST]: Request {0} {1} failed with exception {2}", verb, requestUrl, e);
|
|
}
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
m_log.ErrorFormat("[ASYNC REQUEST]: Request {0} {1} failed with exception {2}", verb, requestUrl, e);
|
|
}
|
|
|
|
// m_log.DebugFormat("[ASYNC REQUEST]: Received {0}", deserial.ToString());
|
|
|
|
try
|
|
{
|
|
action(deserial);
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
m_log.ErrorFormat(
|
|
"[ASYNC REQUEST]: Request {0} {1} callback failed with exception {2}", verb, requestUrl, e);
|
|
}
|
|
|
|
}, null);
|
|
}
|
|
}
|
|
}
|