status: work-in-progress, non-functional

fleshing out OSHttpRequestPump code.

1 files changed, 156 insertions, 0 deletions

diff --git a/OpenSim/Framework/Servers/OSHttpRequestPump.cs b/OpenSim/Framework/Servers/OSHttpRequestPump.cs
index 6214ab0..f04134c 100644
--- a/OpenSim/Framework/Servers/OSHttpRequestPump.cs
+++ b/OpenSim/Framework/Servers/OSHttpRequestPump.cs
@@ -26,6 +26,13 @@
  */
 
 using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Net;
+using System.Reflection;
+using System.Text.RegularExpressions;
+using System.Threading;
+using log4net;
 using HttpServer;
 
 namespace OpenSim.Framework.Servers
@@ -39,11 +46,29 @@ namespace OpenSim.Framework.Servers
     /// </summary>
     public class OSHttpRequestPump
     {
+        private static readonly ILog _log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
         protected OSHttpServer _server;
         protected OSHttpRequestQueue _queue;
+        protected Thread _engine;
 
+        private int _id;
+        
+        public string EngineID
+        {
+            get { return String.Format("{0}-{1}", _server.EngineID, _id); }
+        }
+
+        
         public OSHttpRequestPump()
         {
+            _engine = new Thread(new ThreadStart(Engine));
+            _engine.Name = EngineID;
+            _engine.IsBackground = true;
+            _engine.Start();
+
+            ThreadTracker.Add(_engine);
+
         }
 
         public static OSHttpRequestPump[] Pumps(OSHttpServer server, OSHttpRequestQueue queue, int poolSize)
@@ -53,9 +78,140 @@ namespace OpenSim.Framework.Servers
             {
                 pumps[i]._server = server;
                 pumps[i]._queue = queue;
+                pumps[i]._id = i;
             }
 
             return pumps;
         }
+
+        public void Start()
+        {
+            _engine = new Thread(new ThreadStart(Engine));
+            _engine.Name = EngineID;
+            _engine.IsBackground = true;
+            _engine.Start();
+
+            ThreadTracker.Add(_engine);
+        }
+
+        public void Engine()
+        {
+            OSHttpRequest req = null;
+            
+            try {
+                while (true)
+                {
+                    // get job to do
+                    req = _queue.Dequeue();
+
+                    // get list of registered handlers
+                    List<OSHttpHandler> handlers = _server.OSHttpHandlers;
+
+                    // prune list and sort from most specific to least
+                    // specific
+                    handlers = MatchHandlers(req, handlers);
+
+                    // process req
+                    foreach(OSHttpHandler h in handlers)
+                    {
+                        OSHttpHandlerResult rc = h.Process(req);
+                        // handler did not process the request, try
+                        // next handler
+                        if (OSHttpHandlerResult.Pass == rc) continue;
+                        // handler is taking over processing of
+                        // request, we are done
+                        if (OSHttpHandlerResult.Detached == rc) break;
+                        
+                        // request was handled, we need to clean up
+                        // TODO: cleanup :-)
+                        
+                        break;
+                    }
+                    
+                }
+            }
+            catch (Exception e)
+            {
+                _log.DebugFormat("[{0}] something went wrong: {1}", EngineID, e.ToString());
+                _log.ErrorFormat("[{0}] something went wrong: {1}, terminating this pump", EngineID, e.Message);
+            }
+        }
+
+        protected List<OSHttpHandler> MatchHandlers(OSHttpRequest req, List<OSHttpHandler> handlers)
+        {
+            Dictionary<OSHttpHandler, int> scoredHandlers = new Dictionary<OSHttpHandler, int>();
+
+            foreach (OSHttpHandler h in handlers)
+            {
+                Regex pathRegex = h.Path;
+                Dictionary<string, Regex> headerRegexs = h.Headers;
+                Regex endPointsRegex = h.IPEndPointWhitelist;
+
+                int pathMatch = 0;
+                int headersMatch = 0;
+
+                // first, check whether IPEndPointWhitelist applies
+                // and, if it does, whether client is on that white
+                // list.
+                if (null != endPointsRegex)
+                {
+                    // TODO: following code requires code changes to
+                    // HttpServer.HttpRequest
+
+                    // IPEndPoint remote = HttpServer.HttpRequest.RemoteIPEndPoint;
+                    // Match epm = endPointsRegex.Match(remote.ToString());
+                    // if (!epm.Success) continue;
+                }
+
+                // whitelist ok, now check path
+                if (null != pathRegex)
+                {
+                    Match m = pathRegex.Match(req.HttpRequest.Uri.AbsolutePath);
+                    if (!m.Success) continue;
+
+                    scoredHandlers[h] = m.ToString().Length;
+                }
+
+                // whitelist & path ok, now check headers
+                if (null != headerRegexs)
+                {
+                    // go through all header Regexs and evaluate
+                    // match: 
+                    //     if header field not present or does not match: 
+                    //         remove handler from scoredHandlers 
+                    //         continue
+                    //     else: 
+                    //         add increment headersMatch
+                    NameValueCollection headers = req.HttpRequest.Headers;
+                    foreach (string tag in headerRegexs.Keys)
+                    {
+                        if (null != headers[tag])
+                        {
+                            Match hm = headerRegexs[tag].Match(headers[tag]);
+                            if (hm.Success) {
+                                headersMatch++;
+                                continue;
+                            }
+                        }
+
+                        scoredHandlers.Remove(h);
+                        break;
+                    }
+                    // check whether h got kicked out
+                    if (!scoredHandlers.ContainsKey(h)) continue;
+
+                    scoredHandlers[h] +=  headersMatch;
+                }
+            }
+            
+            List<OSHttpHandler> matchingHandlers = new List<OSHttpHandler>(scoredHandlers.Keys);
+            matchingHandlers.Sort(delegate(OSHttpHandler x, OSHttpHandler y)
+                                  {
+                                      return scoredHandlers[x] - scoredHandlers[y];
+                                  });
+
+            return matchingHandlers;
+        }
+        
     }
 }