1 files changed, 295 insertions, 0 deletions

diff --git a/OpenSim/Framework/Servers/HttpServer/RestSessionService.cs b/OpenSim/Framework/Servers/HttpServer/RestSessionService.cs
new file mode 100644
index 0000000..ad69cd2
--- /dev/null
+++ b/OpenSim/Framework/Servers/HttpServer/RestSessionService.cs
@@ -0,0 +1,295 @@
+/*
+ * 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 RestSessionObject<TRequest>
+    {
+        private string sid;
+        private string aid;
+        private TRequest request_body;
+
+        public string SessionID
+        {
+            get { return sid; }
+            set { sid = value; }
+        }
+
+        public string AvatarID
+        {
+            get { return aid; }
+            set { aid = value; }
+        }
+
+        public TRequest Body
+        {
+            get { return request_body; }
+            set { request_body = value; }
+        }
+    }
+
+    public class SynchronousRestSessionObjectPoster<TRequest, TResponse>
+    {
+        public static TResponse BeginPostObject(string verb, string requestUrl, TRequest obj, string sid, string aid)
+        {
+            RestSessionObject<TRequest> sobj = new RestSessionObject<TRequest>();
+            sobj.SessionID = sid;
+            sobj.AvatarID = aid;
+            sobj.Body = obj;
+
+            Type type = typeof(RestSessionObject<TRequest>);
+
+            WebRequest request = WebRequest.Create(requestUrl);
+            request.Method = verb;
+            request.ContentType = "text/xml";
+            request.Timeout = 20000;
+
+            using (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, sobj);
+                    writer.Flush();
+                }
+
+                int length = (int)buffer.Length;
+                request.ContentLength = length;
+
+                using (Stream requestStream = request.GetRequestStream())
+                    requestStream.Write(buffer.ToArray(), 0, length);
+            }
+
+            TResponse deserial = default(TResponse);
+            using (WebResponse resp = request.GetResponse())
+            {
+                XmlSerializer deserializer = new XmlSerializer(typeof(TResponse));
+
+                using (Stream respStream = resp.GetResponseStream())
+                    deserial = (TResponse)deserializer.Deserialize(respStream);
+            }
+
+            return deserial;
+        }
+    }
+
+    public class RestSessionObjectPosterResponse<TRequest, TResponse>
+    {
+        public ReturnResponse<TResponse> ResponseCallback;
+
+        public void BeginPostObject(string requestUrl, TRequest obj, string sid, string aid)
+        {
+            BeginPostObject("POST", requestUrl, obj, sid, aid);
+        }
+
+        public void BeginPostObject(string verb, string requestUrl, TRequest obj, string sid, string aid)
+        {
+            RestSessionObject<TRequest> sobj = new RestSessionObject<TRequest>();
+            sobj.SessionID = sid;
+            sobj.AvatarID = aid;
+            sobj.Body = obj;
+
+            Type type = typeof(RestSessionObject<TRequest>);
+
+            WebRequest request = WebRequest.Create(requestUrl);
+            request.Method = verb;
+            request.ContentType = "text/xml";
+            request.Timeout = 10000;
+
+            using (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, sobj);
+                    writer.Flush();
+                }
+
+                int length = (int)buffer.Length;
+                request.ContentLength = length;
+
+                using (Stream requestStream = request.GetRequestStream())
+                    requestStream.Write(buffer.ToArray(), 0, length);
+            }
+
+            // IAsyncResult result = request.BeginGetResponse(AsyncCallback, request);
+            request.BeginGetResponse(AsyncCallback, request);
+        }
+
+        private void AsyncCallback(IAsyncResult result)
+        {
+            WebRequest request = (WebRequest)result.AsyncState;
+            using (WebResponse resp = request.EndGetResponse(result))
+            {
+                TResponse deserial;
+                XmlSerializer deserializer = new XmlSerializer(typeof(TResponse));
+                Stream stream = resp.GetResponseStream();
+
+                // This is currently a bad debug stanza since it gobbles us the response...
+                //                StreamReader reader = new StreamReader(stream);
+                //                m_log.DebugFormat("[REST OBJECT POSTER RESPONSE]: Received {0}", reader.ReadToEnd());
+
+                deserial = (TResponse)deserializer.Deserialize(stream);
+                if (stream != null)
+                    stream.Close();
+
+                if (deserial != null && ResponseCallback != null)
+                {
+                    ResponseCallback(deserial);
+                }
+            }
+        }
+    }
+
+    public delegate bool CheckIdentityMethod(string sid, string aid);
+
+    public class RestDeserialiseSecureHandler<TRequest, TResponse> : BaseOutputStreamHandler, IStreamHandler
+        where TRequest : new()
+    {
+        private static readonly ILog m_log
+            = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        private RestDeserialiseMethod<TRequest, TResponse> m_method;
+        private CheckIdentityMethod m_smethod;
+
+        public RestDeserialiseSecureHandler(
+             string httpMethod, string path,
+             RestDeserialiseMethod<TRequest, TResponse> method, CheckIdentityMethod smethod)
+            : base(httpMethod, path)
+        {
+            m_smethod = smethod;
+            m_method = method;
+        }
+
+        protected override void ProcessRequest(string path, Stream request, Stream responseStream,
+                           IOSHttpRequest httpRequest, IOSHttpResponse httpResponse)
+        {
+            RestSessionObject<TRequest> deserial = default(RestSessionObject<TRequest>);
+            bool fail = false;
+
+            using (XmlTextReader xmlReader = new XmlTextReader(request))
+            {
+                try
+                {
+                    XmlSerializer deserializer = new XmlSerializer(typeof(RestSessionObject<TRequest>));
+                    deserial = (RestSessionObject<TRequest>)deserializer.Deserialize(xmlReader);
+                }
+                catch (Exception e)
+                {
+                    m_log.Error("[REST]: Deserialization problem. Ignoring request. " + e);
+                    fail = true;
+                }
+            }
+
+            TResponse response = default(TResponse);
+            if (!fail && m_smethod(deserial.SessionID, deserial.AvatarID))
+            {
+                response = m_method(deserial.Body);
+            }
+
+            using (XmlWriter xmlWriter = XmlTextWriter.Create(responseStream))
+            {
+                XmlSerializer serializer = new XmlSerializer(typeof(TResponse));
+                serializer.Serialize(xmlWriter, response);
+            }
+        }
+    }
+
+    public delegate bool CheckTrustedSourceMethod(IPEndPoint peer);
+
+    public class RestDeserialiseTrustedHandler<TRequest, TResponse> : BaseOutputStreamHandler, IStreamHandler
+        where TRequest : new()
+    {
+        private static readonly ILog m_log
+            = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        /// <summary>
+        /// The operation to perform once trust has been established.
+        /// </summary>
+        private RestDeserialiseMethod<TRequest, TResponse> m_method;
+
+        /// <summary>
+        /// The method used to check whether a request is trusted.
+        /// </summary>
+        private CheckTrustedSourceMethod m_tmethod;
+
+        public RestDeserialiseTrustedHandler(string httpMethod, string path, RestDeserialiseMethod<TRequest, TResponse> method, CheckTrustedSourceMethod tmethod)
+            : base(httpMethod, path)
+        {
+            m_tmethod = tmethod;
+            m_method = method;
+        }
+
+        protected override void ProcessRequest(string path, Stream request, Stream responseStream,
+                           IOSHttpRequest httpRequest, IOSHttpResponse httpResponse)
+        {
+            TRequest deserial = default(TRequest);
+            bool fail = false;
+
+            using (XmlTextReader xmlReader = new XmlTextReader(request))
+            {
+                try
+                {
+                    XmlSerializer deserializer = new XmlSerializer(typeof(TRequest));
+                    deserial = (TRequest)deserializer.Deserialize(xmlReader);
+                }
+                catch (Exception e)
+                {
+                    m_log.Error("[REST]: Deserialization problem. Ignoring request. " + e);
+                    fail = true;
+                }
+            }
+
+            TResponse response = default(TResponse);
+            if (!fail && m_tmethod(httpRequest.RemoteIPEndPoint))
+            {
+                response = m_method(deserial);
+            }
+
+            using (XmlWriter xmlWriter = XmlTextWriter.Create(responseStream))
+            {
+                XmlSerializer serializer = new XmlSerializer(typeof(TResponse));
+                serializer.Serialize(xmlWriter, response);
+            }
+        }
+    }   
+}
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