From Michael Osias (IBM)

This patch implements the llHttpRequest function via a region module,
HttpScriptsRequest.  There were bits and peices in LSLLong_cmd_handler,
which I moved into the region module, and just check for completed
requests and dispatch the http_response callback event instead.

works for me as of r2674

1 files changed, 317 insertions, 2 deletions

diff --git a/OpenSim/Region/Environment/Modules/ScriptsHttpRequests.cs b/OpenSim/Region/Environment/Modules/ScriptsHttpRequests.cs
index 5ac0b39..dc4ef35 100644
--- a/OpenSim/Region/Environment/Modules/ScriptsHttpRequests.cs
+++ b/OpenSim/Region/Environment/Modules/ScriptsHttpRequests.cs
@@ -26,9 +26,324 @@
 * 
 */
 
+using System;
+using System.IO;
+using System.Net;
+using System.Text;
+using OpenSim.Region.Environment.Interfaces;
+using OpenSim.Region.Environment.Scenes;
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading;
+using libsecondlife;
+using Nini.Config;
+using Nwc.XmlRpc;
+using OpenSim.Framework.Servers;
+
+/*****************************************************
+ *
+ * ScriptsHttpRequests
+ * 
+ * Implements the llHttpRequest and http_response
+ * callback.
+ * 
+ * Some stuff was already in LSLLongCmdHandler, and then
+ * there was this file with a stub class in it.  So,
+ * I am moving some of the objects and functions out of
+ * LSLLongCmdHandler, such as the HttpRequestClass, the
+ * start and stop methods, and setting up pending and 
+ * completed queues.  These are processed in the 
+ * LSLLongCmdHandler polling loop.  Similiar to the 
+ * XMLRPCModule, since that seems to work.
+ * 
+ * //TODO
+ * 
+ * This probably needs some throttling mechanism but
+ * its wide open right now.  This applies to both
+ * number of requests and data volume.
+ * 
+ * Linden puts all kinds of header fields in the requests.
+ * Not doing any of that:
+ * User-Agent
+ * X-SecondLife-Shard
+ * X-SecondLife-Object-Name
+ * X-SecondLife-Object-Key
+ * X-SecondLife-Region
+ * X-SecondLife-Local-Position
+ * X-SecondLife-Local-Velocity
+ * X-SecondLife-Local-Rotation
+ * X-SecondLife-Owner-Name
+ * X-SecondLife-Owner-Key
+ * 
+ * HTTPS support
+ * 
+ * Configurable timeout?
+ * Configurable max repsonse size?
+ * Configurable
+ * 
+ * **************************************************/
+
 namespace OpenSim.Region.Environment.Modules
 {
-    internal class ScriptsHttpRequests
+   public class ScriptHTTPRequests : IRegionModule, IHttpRequests
+   {
+       private Scene m_scene;
+       private Queue<HttpRequestClass> rpcQueue = new Queue<HttpRequestClass>();
+       private object HttpListLock = new object();
+       private string m_name = "HttpScriptRequests";
+       private int httpTimeout = 300;
+
+       // <request id, HttpRequestClass>
+       private Dictionary<LLUUID, HttpRequestClass> m_pendingRequests;
+
+       public ScriptHTTPRequests()
+       {
+       }
+
+       public void Initialise(Scene scene, IConfigSource config)
+       {
+           m_scene = scene;
+
+           m_scene.RegisterModuleInterface<IHttpRequests>(this);
+
+           m_pendingRequests = new Dictionary<LLUUID, HttpRequestClass>();
+       }
+
+       public void PostInitialise()
+       {
+       }
+
+       public void Close()
+       {
+       }
+
+       public string Name
+       {
+           get { return m_name; }
+       }
+
+       public bool IsSharedModule
+       {
+           get { return true; }
+       }
+
+       public LLUUID MakeHttpRequest(string url, string parameters, string body) {
+           return LLUUID.Zero;
+       }
+
+       public LLUUID StartHttpRequest(uint localID, LLUUID itemID, string url, List<string> parameters, string body)
+       {
+           LLUUID reqID = LLUUID.Random();
+           HttpRequestClass htc = new HttpRequestClass();
+
+           // Parameters are expected in {key, value, ... , key, value}
+           if( parameters != null )
+           {
+               string[] parms = parameters.ToArray();
+               for (int i = 0; i < parms.Length / 2; i += 2)
+                {
+                    switch( Int32.Parse(parms[i]) )
+                    {
+                        case HttpRequestClass.HTTP_METHOD:
+
+                           htc.httpMethod = parms[i + 1];
+                           break;
+
+                        case HttpRequestClass.HTTP_MIMETYPE:
+                           
+                           htc.httpMIMEType = parms[i + 1];
+                           break;
+
+                        case HttpRequestClass.HTTP_BODY_MAXLENGTH:
+                           
+                           // TODO implement me
+                           break;
+
+                        case HttpRequestClass.HTTP_VERIFY_CERT:
+                           
+                           // TODO implement me
+                           break;
+                    }
+                }
+           }
+
+           htc.localID = localID;
+           htc.itemID = itemID;
+           htc.url = url;
+           htc.reqID = reqID;
+           htc.httpTimeout = httpTimeout;
+           htc.outbound_body = body;
+
+           lock (HttpListLock)
+           {
+               m_pendingRequests.Add(reqID, htc);
+           }
+
+           htc.process();
+
+           return reqID;
+       }
+
+       public void StopHttpRequest(uint m_localID, LLUUID m_itemID)
+       {
+           lock (HttpListLock)
+           {
+
+               HttpRequestClass tmpReq;
+               if (m_pendingRequests.TryGetValue(m_itemID, out tmpReq))
+               {
+                   tmpReq.Stop();
+                   m_pendingRequests.Remove(m_itemID);
+               }
+           }
+       }
+
+       /*
+        * TODO
+        * Not sure how important ordering is is here - the next first
+        * one completed in the list is returned, based soley on its list
+        * position, not the order in which the request was started or
+        * finsihed.  I thought about setting up a queue for this, but
+        * it will need some refactoring and this works 'enough' right now
+        */
+       public HttpRequestClass GetNextCompletedRequest()
+       {
+           lock (HttpListLock)
+           {
+                foreach (LLUUID luid in m_pendingRequests.Keys)
+                {
+                    HttpRequestClass tmpReq;
+
+                    if (m_pendingRequests.TryGetValue(luid, out tmpReq))
+                    {
+                        if (tmpReq.finished)
+                        {
+                            m_pendingRequests.Remove(luid);
+                            return tmpReq;
+                        }
+                    }
+                }
+            }
+            return null;
+       }
+
+
+   }
+
+   //
+   // HTTP REAQUEST
+   // This class was originally in LSLLongCmdHandler
+   //
+   // TODO: setter/getter methods, maybe pass some in
+   // constructor
+   //
+
+    public class HttpRequestClass
     {
+        // Constants for parameters
+        public const int HTTP_METHOD = 0;
+        public const int HTTP_MIMETYPE = 1;
+        public const int HTTP_BODY_MAXLENGTH = 2;
+        public const int HTTP_VERIFY_CERT = 3;
+
+        // Parameter members and default values
+        public string httpMethod = "GET";
+        public string httpMIMEType = "text/plain;charset=utf-8";
+        public int httpBodyMaxLen = 2048; // not implemented
+        public bool httpVerifyCert = true; // not implemented
+
+        // Request info
+        public uint localID;
+        public LLUUID itemID;
+        public LLUUID reqID;
+        public int httpTimeout;
+        public string url;
+        public string outbound_body;
+        public DateTime next;
+        public int status;
+        public bool finished;
+        public List<string> response_metadata;
+        public string response_body;
+        public HttpWebRequest request;
+        private Thread httpThread;
+
+        public void process()
+        {
+            httpThread = new Thread(SendRequest);
+            httpThread.Name = "HttpRequestThread";
+            httpThread.Priority = ThreadPriority.BelowNormal;
+            httpThread.IsBackground = true;
+            httpThread.Start();
+        }
+
+        /*
+         * TODO: More work on the response codes.  Right now
+         * returning 200 for success or 499 for exception
+         */
+        public void SendRequest()
+        {
+
+            HttpWebResponse response = null;
+            StringBuilder sb = new StringBuilder();
+            byte[] buf = new byte[8192];
+            string tempString = null;
+            int count = 0;
+
+            try
+            {
+                request = (HttpWebRequest)
+                    WebRequest.Create(url);
+                request.Method = httpMethod;
+                request.ContentType = httpMIMEType;
+
+                request.Timeout = httpTimeout;
+                // execute the request
+                response = (HttpWebResponse)
+                    request.GetResponse();
+
+                Stream resStream = response.GetResponseStream();
+
+                do
+                {
+                    // fill the buffer with data
+                    count = resStream.Read(buf, 0, buf.Length);
+
+                    // make sure we read some data
+                    if (count != 0)
+                    {
+                        // translate from bytes to ASCII text
+                        tempString = Encoding.ASCII.GetString(buf, 0, count);
+
+                        // continue building the string
+                        sb.Append(tempString);
+                    }
+                }
+                while (count > 0); // any more data to read?
+
+                response_body = sb.ToString();
+
+            }
+            catch (Exception e)
+            {
+                status = 499;
+                response_body = e.Message;
+                finished = true;
+                return;
+            }
+
+            status = 200;
+            finished = true;
+
+        }
+
+        public void Stop()
+        {
+            try
+            {
+                httpThread.Abort();
+            }
+            catch (Exception e) { }
+        }
     }
-}
\ No newline at end of file
+
+ }
\ No newline at end of file