OpenSimMirror/Common/OpenSim.Servers/BaseHttpServer.cs

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/*
* Copyright (c) Contributors, http://www.openmetaverse.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 OpenSim 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.
*
*/
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using System;
using System.Collections.Generic;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
//using OpenSim.CAPS;
using Nwc.XmlRpc;
using System.Collections;
using OpenSim.Framework.Console;
namespace OpenSim.Servers
{
public class BaseHttpServer
{
protected class RestMethodEntry
{
private string m_path;
public string Path
{
get { return m_path; }
}
private RestMethod m_restMethod;
public RestMethod RestMethod
{
get { return m_restMethod; }
}
public RestMethodEntry(string path, RestMethod restMethod)
{
m_path = path;
m_restMethod = restMethod;
}
}
protected Thread m_workerThread;
protected HttpListener m_httpListener;
protected Dictionary<string, RestMethodEntry> m_restHandlers = new Dictionary<string, RestMethodEntry>();
protected Dictionary<string, XmlRpcMethod> m_rpcHandlers = new Dictionary<string, XmlRpcMethod>();
protected int m_port;
protected bool firstcaps = true;
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public BaseHttpServer(int port)
{
m_port = port;
}
public bool AddRestHandler(string method, string path, RestMethod handler)
{
Console.WriteLine("adding new REST handler for path " + path);
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string methodKey = String.Format("{0}: {1}", method, path);
if (!this.m_restHandlers.ContainsKey(methodKey))
{
this.m_restHandlers.Add(methodKey, new RestMethodEntry(path, handler));
return true;
}
//must already have a handler for that path so return false
return false;
}
public bool RemoveRestHandler(string method, string path)
{
string methodKey = String.Format("{0}: {1}", method, path);
if (this.m_restHandlers.ContainsKey(methodKey))
{
this.m_restHandlers.Remove(methodKey);
return true;
}
return false;
}
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public bool AddXmlRPCHandler(string method, XmlRpcMethod handler)
{
if (!this.m_rpcHandlers.ContainsKey(method))
{
this.m_rpcHandlers.Add(method, handler);
return true;
}
//must already have a handler for that path so return false
return false;
}
protected virtual string ProcessXMLRPCMethod(string methodName, XmlRpcRequest request)
{
XmlRpcResponse response;
XmlRpcMethod method;
if (this.m_rpcHandlers.TryGetValue(methodName, out method))
{
response = method(request);
}
else
{
response = new XmlRpcResponse();
Hashtable unknownMethodError = new Hashtable();
unknownMethodError["reason"] = "XmlRequest"; ;
unknownMethodError["message"] = "Unknown Rpc request";
unknownMethodError["login"] = "false";
response.Value = unknownMethodError;
}
return XmlRpcResponseSerializer.Singleton.Serialize(response);
}
protected virtual string ParseREST(string request, string path, string method)
{
string response;
string requestKey = String.Format("{0}: {1}", method, path);
string bestMatch = String.Empty;
foreach (string currentKey in m_restHandlers.Keys)
{
if (requestKey.StartsWith(currentKey))
{
if (currentKey.Length > bestMatch.Length)
{
bestMatch = currentKey;
}
}
}
RestMethodEntry restMethodEntry;
if (m_restHandlers.TryGetValue(bestMatch, out restMethodEntry))
{
RestMethod restMethod = restMethodEntry.RestMethod;
string param = path.Substring(restMethodEntry.Path.Length);
response = restMethod(request, path, param);
}
else
{
response = String.Empty;
}
return response;
}
protected virtual string ParseLLSDXML(string requestBody)
{
// dummy function for now - IMPLEMENT ME!
Console.WriteLine("LLSD request "+requestBody);
string resp = "";
if (firstcaps)
{
resp = "<llsd><map><key>MapLayer</key><string>http://127.0.0.1:9000/CAPS/</string></map></llsd>";
firstcaps = false;
}
return resp;
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}
protected virtual string ParseXMLRPC(string requestBody)
{
string responseString = String.Empty;
try
{
XmlRpcRequest request = (XmlRpcRequest)(new XmlRpcRequestDeserializer()).Deserialize(requestBody);
string methodName = request.MethodName;
responseString = ProcessXMLRPCMethod(methodName, request);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
return responseString;
}
public virtual void HandleRequest(Object stateinfo)
{
try
{
HttpListenerContext context = (HttpListenerContext)stateinfo;
HttpListenerRequest request = context.Request;
HttpListenerResponse response = context.Response;
response.KeepAlive = false;
response.SendChunked = false;
System.IO.Stream body = request.InputStream;
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
System.IO.StreamReader reader = new System.IO.StreamReader(body, encoding);
string requestBody = reader.ReadToEnd();
body.Close();
reader.Close();
//Console.WriteLine(request.HttpMethod + " " + request.RawUrl + " Http/" + request.ProtocolVersion.ToString() + " content type: " + request.ContentType);
//Console.WriteLine(requestBody);
string responseString = "";
Console.WriteLine("new request " + request.ContentType +" at "+ request.RawUrl);
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switch (request.ContentType)
{
case "text/xml":
// must be XML-RPC, so pass to the XML-RPC parser
responseString = ParseXMLRPC(requestBody);
responseString = Regex.Replace(responseString, "utf-16", "utf-8");
response.AddHeader("Content-type", "text/xml");
break;
case "application/xml":
// probably LLSD we hope, otherwise it should be ignored by the parser
// responseString = ParseLLSDXML(requestBody);
responseString = ParseREST(requestBody, request.RawUrl, request.HttpMethod);
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response.AddHeader("Content-type", "application/xml");
break;
case "application/octet-stream":
// probably LLSD we hope, otherwise it should be ignored by the parser
// responseString = ParseLLSDXML(requestBody);
responseString = ParseREST(requestBody, request.RawUrl, request.HttpMethod);
response.AddHeader("Content-type", "application/xml");
break;
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case "application/x-www-form-urlencoded":
// a form data POST so send to the REST parser
responseString = ParseREST(requestBody, request.RawUrl, request.HttpMethod);
response.AddHeader("Content-type", "text/html");
break;
case null:
// must be REST or invalid crap, so pass to the REST parser
responseString = ParseREST(requestBody, request.RawUrl, request.HttpMethod);
response.AddHeader("Content-type", "text/html");
break;
}
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);
System.IO.Stream output = response.OutputStream;
response.SendChunked = false;
response.ContentLength64 = buffer.Length;
output.Write(buffer, 0, buffer.Length);
output.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
public void Start()
{
OpenSim.Framework.Console.MainLog.Instance.WriteLine(LogPriority.LOW, "BaseHttpServer.cs: Starting up HTTP Server");
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m_workerThread = new Thread(new ThreadStart(StartHTTP));
m_workerThread.IsBackground = true;
m_workerThread.Start();
}
private void StartHTTP()
{
try
{
OpenSim.Framework.Console.MainLog.Instance.WriteLine(LogPriority.LOW, "BaseHttpServer.cs: StartHTTP() - Spawned main thread OK");
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m_httpListener = new HttpListener();
m_httpListener.Prefixes.Add("http://+:" + m_port + "/");
m_httpListener.Start();
HttpListenerContext context;
while (true)
{
context = m_httpListener.GetContext();
ThreadPool.QueueUserWorkItem(new WaitCallback(HandleRequest), context);
}
}
catch (Exception e)
{
OpenSim.Framework.Console.MainLog.Instance.WriteLine(LogPriority.MEDIUM, e.Message);
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}
}
}
}