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

OpenSim/Region/Environment/Interfaces/IHttpRequests.cs

@@ -27,11 +27,16 @@
 */
 
 using libsecondlife;
+using OpenSim.Region.Environment.Modules;
+using System.Collections.Generic;
 
 namespace OpenSim.Region.Environment.Interfaces
 {
     public interface IHttpRequests
     {
-        LLUUID MakeHttpRequest(string url, string type, string body);
+        LLUUID MakeHttpRequest(string url, string parameters, string body);
+        LLUUID StartHttpRequest(uint localID, LLUUID itemID, string url, List<string> parameters, string body);
+        void StopHttpRequest(uint m_localID, LLUUID m_itemID);
+        HttpRequestClass GetNextCompletedRequest();
     }
 }

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) { }
+        }
+    }
+
+ }

OpenSim/Region/Environment/Modules/XMLRPCModule.cs

@@ -121,7 +121,7 @@ namespace OpenSim.Region.Environment.Modules
 
         public bool IsSharedModule
         {
-            get { return false; }
+            get { return true; }
         }
 
         /**********************************************

OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands_Interface.cs

@@ -614,7 +614,7 @@ namespace OpenSim.Region.ScriptEngine.Common
         int llGetRegionFlags();
         //wiki: string llXorBase64StringsCorrect(string str1, string str2)
         string llXorBase64StringsCorrect(string str1, string str2);
-        void llHTTPRequest(string url, List<string> parameters, string body);
+        string llHTTPRequest(string url, List<string> parameters, string body);
         //wiki: llResetLandBanList()
         void llResetLandBanList();
         //wiki: llResetLandPassList()

OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/LSL/LSL_BaseClass.cs

@@ -1759,9 +1759,9 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.LSL
             return m_LSL_Functions.llXorBase64StringsCorrect(str1, str2);
         }
 
-        public void llHTTPRequest(string url, List<string> parameters, string body)
+        public string llHTTPRequest(string url, List<string> parameters, string body)
         {
-            m_LSL_Functions.llHTTPRequest(url, parameters, body);
+            return m_LSL_Functions.llHTTPRequest(url, parameters, body);
         }
 
         public void llResetLandBanList()

OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/Server_API/LSL_BuiltIn_Commands.cs

@@ -2451,9 +2451,18 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler
             return llStringToBase64(ret);
         }
 
-        public void llHTTPRequest(string url, List<string> parameters, string body)
+        public string llHTTPRequest(string url, List<string> parameters, string body)
         {
-            m_ScriptEngine.m_LSLLongCmdHandler.StartHttpRequest(m_localID, m_itemID, url, parameters, body);
+            IHttpRequests httpScriptMod =
+                m_ScriptEngine.World.RequestModuleInterface<IHttpRequests>();
+
+            LLUUID reqID = httpScriptMod.
+                    StartHttpRequest(m_localID, m_itemID, url, parameters, body);
+
+            if( reqID != null )
+                return reqID.ToString();
+            else
+                return null;
         }
 
         public void llResetLandBanList()

OpenSim/Region/ScriptEngine/DotNetEngine/LSLLongCmdHandler.cs

@@ -110,7 +110,9 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
             // Remove from: Timers
             UnSetTimerEvents(localID, itemID);
             // Remove from: HttpRequest
-            StopHttpRequest(localID, itemID);
+            IHttpRequests iHttpReq =
+                m_ScriptEngine.World.RequestModuleInterface<IHttpRequests>();
+            iHttpReq.StopHttpRequest(localID, itemID);
         }
 
         #region TIMER
@@ -198,115 +200,43 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
 
         #region HTTP REQUEST
 
-        //
-        // HTTP REAQUEST
-        //
-        private class HttpClass
-        {
-            public uint localID;
-            public LLUUID itemID;
-            public string url;
-            public List<string> parameters;
-            public string body;
-            public DateTime next;
-
-            public string response_request_id;
-            public int response_status;
-            public List<string> response_metadata;
-            public string response_body;
-
-            public void SendRequest()
-            {
-                // TODO: SEND REQUEST!!!
-            }
-
-            public void Stop()
-            {
-                // TODO: Cancel any ongoing request
-            }
-
-            public bool CheckResponse()
-            {
-                // TODO: Check if we got a response yet, return true if so -- false if not
-                return true;
-
-                // TODO: If we got a response, set the following then return true
-                //response_request_id
-                //response_status
-                //response_metadata
-                //response_body
-            }
-        }
-
-        private List<HttpClass> HttpRequests = new List<HttpClass>();
-        private object HttpListLock = new object();
-
-        public void StartHttpRequest(uint localID, LLUUID itemID, string url, List<string> parameters, string body)
-        {
-            Console.WriteLine("StartHttpRequest");
-
-            HttpClass htc = new HttpClass();
-            htc.localID = localID;
-            htc.itemID = itemID;
-            htc.url = url;
-            htc.parameters = parameters;
-            htc.body = body;
-            lock (HttpListLock)
-            {
-                //ADD REQUEST
-                HttpRequests.Add(htc);
-            }
-        }
-
-        public void StopHttpRequest(uint m_localID, LLUUID m_itemID)
-        {
-            // Remove from list
-            lock (HttpListLock)
-            {
-                List<HttpClass> NewHttpList = new List<HttpClass>();
-                foreach (HttpClass ts in HttpRequests)
-                {
-                    if (ts.localID != m_localID && ts.itemID != m_itemID)
-                    {
-                        // Keeping this one
-                        NewHttpList.Add(ts);
-                    }
-                    else
-                    {
-                        // Shutting this one down
-                        ts.Stop();
-                    }
-                }
-                HttpRequests.Clear();
-                HttpRequests = NewHttpList;
-            }
-        }
-
         public void CheckHttpRequests()
         {
-            // Nothing to do here?
+            IHttpRequests iHttpReq = 
-            if (HttpRequests.Count == 0)
+                m_ScriptEngine.World.RequestModuleInterface<IHttpRequests>();
-                return;
 
-            lock (HttpListLock)
+            HttpRequestClass httpInfo = null;
+
+            if( iHttpReq != null )
+                httpInfo = iHttpReq.GetNextCompletedRequest();
+
+            while ( httpInfo != null )
             {
-                foreach (HttpClass ts in HttpRequests)
+                
+                Console.WriteLine("PICKED HTTP REQ:" + httpInfo.response_body + httpInfo.status);
+
+                // Deliver data to prim's remote_data handler
+                //
+                // TODO: Returning null for metadata, since the lsl function
+                // only returns the byte for HTTP_BODY_TRUNCATED, which is not
+                // implemented here yet anyway.  Should be fixed if/when maxsize
+                // is supported
+                
+                object[] resobj = new object[]
                     {
-                    if (ts.CheckResponse() == true)
+                        httpInfo.reqID.ToString(), httpInfo.status, null, httpInfo.response_body
-                    {
+                    };
-                        // Add it to event queue
+
-                        //key request_id, integer status, list metadata, string body
+                m_ScriptEngine.m_EventQueueManager.AddToScriptQueue(
-                        object[] resobj =
+                    httpInfo.localID, httpInfo.itemID, "http_response", resobj
-                            new object[]
+                    );
-                                {ts.response_request_id, ts.response_status, ts.response_metadata, ts.response_body};
+
-                        m_ScriptEngine.m_EventQueueManager.AddToScriptQueue(ts.localID, ts.itemID, "http_response",
+                httpInfo.Stop();
-                                                                            resobj);
+                httpInfo = null;
-                        // Now stop it
+
-                        StopHttpRequest(ts.localID, ts.itemID);
+                httpInfo = iHttpReq.GetNextCompletedRequest();
             }
         }
-            } // lock
-        }
 
         #endregion
 
@@ -314,6 +244,8 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
         {
             IXMLRPC xmlrpc = m_ScriptEngine.World.RequestModuleInterface<IXMLRPC>();
 
+            if (xmlrpc != null)
+            {
                 while (xmlrpc.hasRequests())
                 {
                     RPCRequestInfo rInfo = xmlrpc.GetNextRequest();
@@ -330,6 +262,7 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
                         );
                 }
             }
+        }
 
         public void CheckListeners()
         {
@@ -338,7 +271,6 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
             while (comms.HasMessages())
             {
                 ListenerInfo lInfo = comms.GetNextMessage();
-                Console.WriteLine("PICKED LISTENER");
 
                 //Deliver data to prim's listen handler
                 object[] resobj = new object[]