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/*
* 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 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.
*/
using System;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
namespace OpenSim.Framework.Servers
{
/// <sumary>
/// Any OSHttpHandler must return one of the following results:
/// <list type = "table">
/// <listheader>
/// <term>result code</term>
/// <description>meaning</description>
/// </listheader>
/// <item>
/// <term>Pass</term>
/// <description>handler did not process the request</request>
/// </item>
/// <item>
/// <term>Done</term>
/// <description>handler did process the request, OSHttpServer
/// can clean up and close the request</request>
/// </item>
/// </list>
/// </summary>
public enum OSHttpHandlerResult
{
Unprocessed,
Pass,
Done,
}
/// <summary>
/// An OSHttpHandler that matches on the "content-type" header can
/// supply an OSHttpContentTypeChecker delegate which will be
/// invoked by the request matcher in OSHttpRequestPump.
/// </summary>
/// <returns>true if the handler is interested in the content;
/// false otherwise</returns>
public delegate bool OSHttpContentTypeChecker(OSHttpRequest req);
public abstract class OSHttpHandler
{
/// <summary>
/// Regular expression used to match against method of
/// the incoming HTTP request. If you want to match any string
/// either use '.*' or null. To match on the empty string use
/// '^$'.
/// </summary>
public virtual Regex Method
{
get { return _method; }
}
protected Regex _method;
/// <summary>
/// Regular expression used to match against path of the
/// incoming HTTP request. If you want to match any string
/// either use '.*' or null. To match on the emtpy string use
/// '^$'.
/// </summary>
public virtual Regex Path
{
get { return _path; }
}
protected Regex _path;
/// <summary>
/// Dictionary of (header name, regular expression) tuples,
/// allowing us to match on HTTP header fields.
/// </summary>
public virtual Dictionary<string, Regex> Headers
{
get { return _headers; }
}
protected Dictionary<string, Regex> _headers;
/// <summary>
/// Dictionary of (header name, regular expression) tuples,
/// allowing us to match on HTTP header fields.
/// </summary>
/// <remarks>
/// This feature is currently not implemented as it requires
/// (trivial) changes to HttpServer.HttpListener that have not
/// been implemented.
/// </remarks>
public virtual Regex IPEndPointWhitelist
{
get { return _ipEndPointRegex; }
}
protected Regex _ipEndPointRegex;
/// <summary>
/// An OSHttpHandler that matches on the "content-type" header can
/// supply an OSHttpContentTypeChecker delegate which will be
/// invoked by the request matcher in OSHttpRequestPump.
/// </summary>
/// <returns>true if the handler is interested in the content;
/// false otherwise</returns>
internal virtual OSHttpContentTypeChecker ContentTypeChecker
{
get { return null; }
}
/// <summary>
/// Base class constructor.
/// </summary>
/// <param name="path">null or path regex</param>
/// <param name="headers">null or dictionary of header
/// regexs</param>
/// <param name="contentType">null or content type
/// regex</param>
/// <param name="whitelist">null or IP address regex</param>
public OSHttpHandler(Regex method, Regex path, Dictionary<string, Regex> headers, Regex contentType, Regex whitelist)
{
_method = method;
_path = path;
_ipEndPointRegex = whitelist;
if (null == _headers && null != contentType)
{
_headers = new Dictionary<string, Regex>();
_headers.Add("content-type", contentType);
}
}
/// <summary>
/// Process an incoming OSHttpRequest that matched our
/// requirements.
/// </summary>
/// <returns>
/// OSHttpHandlerResult.Pass if we are after all not
/// interested in the request; OSHttpHandlerResult.Done if we
/// did process the request.
/// </returns>
public abstract OSHttpHandlerResult Process(OSHttpRequest request);
public override string ToString()
{
StringWriter sw = new StringWriter();
sw.WriteLine("{0}", base.ToString());
sw.WriteLine(" method regex {0}", null == Method ? "null" : Method.ToString());
sw.WriteLine(" path regex {0}", null == Path ? "null": Path.ToString());
foreach (string tag in Headers.Keys)
{
sw.WriteLine(" header {0} : {1}", tag, Headers[tag].ToString());
}
sw.WriteLine(" IP whitelist {0}", null == IPEndPointWhitelist ? "null" : IPEndPointWhitelist.ToString());
sw.WriteLine();
sw.Close();
return sw.ToString();
}
}
}
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