240 lines
9.4 KiB
C#
240 lines
9.4 KiB
C#
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namespace Nwc.XmlRpc
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{
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using System;
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using System.Collections;
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using System.IO;
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using System.Net;
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using System.Net.Sockets;
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using System.Text;
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using System.Threading;
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using System.Xml;
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/// <summary>A restricted HTTP server for use with XML-RPC.</summary>
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/// <remarks>It only handles POST requests, and only POSTs representing XML-RPC calls.
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/// In addition to dispatching requests it also provides a registry for request handlers.
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/// </remarks>
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public class XmlRpcServer : IEnumerable
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{
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#pragma warning disable 0414 // disable "private field assigned but not used"
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const int RESPONDER_COUNT = 10;
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private TcpListener _myListener;
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private int _port;
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private IPAddress _address;
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private IDictionary _handlers;
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private XmlRpcSystemObject _system;
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private WaitCallback _wc;
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#pragma warning restore 0414
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///<summary>Constructor with port and address.</summary>
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///<remarks>This constructor sets up a TcpListener listening on the
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///given port and address. It also calls a Thread on the method StartListen().</remarks>
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///<param name="address"><c>IPAddress</c> value of the address to listen on.</param>
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///<param name="port"><c>Int</c> value of the port to listen on.</param>
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public XmlRpcServer(IPAddress address, int port)
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{
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_port = port;
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_address = address;
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_handlers = new Hashtable();
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_system = new XmlRpcSystemObject(this);
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_wc = new WaitCallback(WaitCallback);
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}
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///<summary>Basic constructor.</summary>
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///<remarks>This constructor sets up a TcpListener listening on the
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///given port. It also calls a Thread on the method StartListen(). IPAddress.Any
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///is assumed as the address here.</remarks>
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///<param name="port"><c>Int</c> value of the port to listen on.</param>
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public XmlRpcServer(int port) : this(IPAddress.Any, port) { }
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/// <summary>Start the server.</summary>
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public void Start()
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{
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try
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{
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Stop();
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//start listing on the given port
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// IPAddress addr = IPAddress.Parse("127.0.0.1");
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lock (this)
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{
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_myListener = new TcpListener(IPAddress.Any, _port);
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_myListener.Start();
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//start the thread which calls the method 'StartListen'
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Thread th = new Thread(new ThreadStart(StartListen));
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th.Start();
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}
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}
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catch (Exception e)
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{
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Logger.WriteEntry("An Exception Occurred while Listening :" + e.ToString(), LogLevel.Error);
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}
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}
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/// <summary>Stop the server.</summary>
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public void Stop()
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{
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try
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{
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if (_myListener != null)
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{
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lock (this)
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{
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_myListener.Stop();
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_myListener = null;
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}
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}
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}
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catch (Exception e)
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{
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Logger.WriteEntry("An Exception Occurred while stopping :" +
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e.ToString(), LogLevel.Error);
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}
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}
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/// <summary>Get an enumeration of my XML-RPC handlers.</summary>
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/// <returns><c>IEnumerable</c> the handler enumeration.</returns>
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public IEnumerator GetEnumerator()
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{
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return _handlers.GetEnumerator();
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}
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/// <summary>Retrieve a handler by name.</summary>
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/// <param name="name"><c>String</c> naming a handler</param>
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/// <returns><c>Object</c> that is the handler.</returns>
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public Object this[String name]
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{
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get { return _handlers[name]; }
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}
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///<summary>
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///This method Accepts new connections and dispatches them when appropriate.
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///</summary>
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public void StartListen()
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{
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while (true && _myListener != null)
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{
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//Accept a new connection
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XmlRpcResponder responder = new XmlRpcResponder(this, _myListener.AcceptTcpClient());
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ThreadPool.QueueUserWorkItem(_wc, responder);
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}
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}
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///<summary>
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///Add an XML-RPC handler object by name.
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///</summary>
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///<param name="name"><c>String</c> XML-RPC dispatch name of this object.</param>
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///<param name="obj"><c>Object</c> The object that is the XML-RPC handler.</param>
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public void Add(String name, Object obj)
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{
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_handlers.Add(name, obj);
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}
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///<summary>Return a C# object.method name for and XML-RPC object.method name pair.</summary>
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///<param name="methodName">The XML-RPC object.method.</param>
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///<returns><c>String</c> of form object.method for the underlying C# method.</returns>
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public String MethodName(String methodName)
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{
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int dotAt = methodName.LastIndexOf('.');
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if (dotAt == -1)
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{
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throw new XmlRpcException(XmlRpcErrorCodes.SERVER_ERROR_METHOD,
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XmlRpcErrorCodes.SERVER_ERROR_METHOD_MSG + ": Bad method name " + methodName);
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}
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String objectName = methodName.Substring(0, dotAt);
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Object target = _handlers[objectName];
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if (target == null)
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{
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throw new XmlRpcException(XmlRpcErrorCodes.SERVER_ERROR_METHOD,
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XmlRpcErrorCodes.SERVER_ERROR_METHOD_MSG + ": Object " + objectName + " not found");
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}
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return target.GetType().FullName + "." + methodName.Substring(dotAt + 1);
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}
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///<summary>Invoke a method described in a request.</summary>
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///<param name="req"><c>XmlRpcRequest</c> containing a method descriptions.</param>
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/// <seealso cref="XmlRpcSystemObject.Invoke"/>
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/// <seealso cref="XmlRpcServer.Invoke(String,String,IList)"/>
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public Object Invoke(XmlRpcRequest req)
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{
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return Invoke(req.MethodNameObject, req.MethodNameMethod, req.Params);
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}
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///<summary>Invoke a method on a named handler.</summary>
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///<param name="objectName"><c>String</c> The name of the handler.</param>
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///<param name="methodName"><c>String</c> The name of the method to invoke on the handler.</param>
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///<param name="parameters"><c>IList</c> The parameters to invoke the method with.</param>
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/// <seealso cref="XmlRpcSystemObject.Invoke"/>
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public Object Invoke(String objectName, String methodName, IList parameters)
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{
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Object target = _handlers[objectName];
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if (target == null)
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{
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throw new XmlRpcException(XmlRpcErrorCodes.SERVER_ERROR_METHOD,
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XmlRpcErrorCodes.SERVER_ERROR_METHOD_MSG + ": Object " + objectName + " not found");
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}
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return XmlRpcSystemObject.Invoke(target, methodName, parameters);
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}
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/// <summary>The method the thread pool invokes when a thread is available to handle an HTTP request.</summary>
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/// <param name="responder">TcpClient from the socket accept.</param>
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public void WaitCallback(object responder)
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{
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XmlRpcResponder resp = (XmlRpcResponder)responder;
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if (resp.HttpReq.HttpMethod == "POST")
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{
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try
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{
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resp.Respond();
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}
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catch (Exception e)
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{
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Logger.WriteEntry("Failed on post: " + e, LogLevel.Error);
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}
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}
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else
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{
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Logger.WriteEntry("Only POST methods are supported: " + resp.HttpReq.HttpMethod +
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" ignored", LogLevel.Error);
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}
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resp.Close();
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}
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/// <summary>
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/// This function send the Header Information to the client (Browser)
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/// </summary>
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/// <param name="sHttpVersion">HTTP Version</param>
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/// <param name="sMIMEHeader">Mime Type</param>
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/// <param name="iTotBytes">Total Bytes to be sent in the body</param>
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/// <param name="sStatusCode"></param>
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/// <param name="output">Socket reference</param>
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static public void HttpHeader(string sHttpVersion, string sMIMEHeader, long iTotBytes, string sStatusCode, TextWriter output)
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{
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String sBuffer = "";
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// if Mime type is not provided set default to text/html
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if (sMIMEHeader.Length == 0)
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{
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sMIMEHeader = "text/html"; // Default Mime Type is text/html
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}
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sBuffer += sHttpVersion + sStatusCode + "\r\n";
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sBuffer += "Connection: close\r\n";
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if (iTotBytes > 0)
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sBuffer += "Content-Length: " + iTotBytes + "\r\n";
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sBuffer += "Server: XmlRpcServer \r\n";
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sBuffer += "Content-Type: " + sMIMEHeader + "\r\n";
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sBuffer += "\r\n";
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output.Write(sBuffer);
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}
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}
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}
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