fixing exception when RestPlugin not configured. refactors RestRegionPlugin, adds error checking.

OpenSim/ApplicationPlugins/Rest/Regions/GETRestRegionPlugin.cs

@@ -0,0 +1,184 @@
+/*
+* 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.Threading;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Net;
+using System.Reflection;
+using System.Text.RegularExpressions;
+using System.Timers;
+using System.Xml;
+using System.Xml.Serialization;
+using libsecondlife;
+using Mono.Addins;
+using Nwc.XmlRpc;
+using Nini.Config;
+using OpenSim.Framework;
+using OpenSim.Framework.Console;
+using OpenSim.Framework.Servers;
+using OpenSim.Framework.Communications;
+using OpenSim.Region.Environment.Scenes;
+using OpenSim.ApplicationPlugins.Rest;
+
+namespace OpenSim.ApplicationPlugins.Rest.Regions
+{
+
+    public partial class RestRegionPlugin : RestPlugin
+    {
+        #region GET methods
+        public string GetHandler(string request, string path, string param)
+        {
+            m_log.DebugFormat("{0} GET path {1} param {2}", MsgID, path, param);
+            
+            try
+            {
+                // param empty: regions list
+                if (String.IsNullOrEmpty(param)) return GetHandlerRegions();
+
+                // param not empty: specific region
+                return GetHandlerRegion(param);
+            }
+            catch (Exception e) 
+            {
+                return Failure("GET", e);
+            }
+        }
+
+        public string GetHandlerRegions()
+        {
+            XmlWriter.WriteStartElement(String.Empty, "regions", String.Empty);
+            foreach (Scene s in App.SceneManager.Scenes)
+            {
+                XmlWriter.WriteStartElement(String.Empty, "uuid", String.Empty);
+                XmlWriter.WriteString(s.RegionInfo.RegionID.ToString());
+                XmlWriter.WriteEndElement();
+            }
+            XmlWriter.WriteEndElement();
+            
+            return XmlWriterResult;
+        }
+
+        protected string ShortRegionInfo(string key, string value)
+        {
+            if (String.IsNullOrEmpty(value) ||
+                String.IsNullOrEmpty(key)) return null;
+
+            XmlWriter.WriteStartElement(String.Empty, "region", String.Empty);
+            XmlWriter.WriteStartElement(String.Empty, key, String.Empty);
+            XmlWriter.WriteString(value);
+            XmlWriter.WriteEndDocument();
+
+            return XmlWriterResult;
+        }
+
+        public string GetHandlerRegion(string param)
+        {
+            // be resilient and don't get confused by a terminating '/'
+            param = param.TrimEnd(new char[]{'/'});
+            string[] comps = param.Split('/');
+            LLUUID regionID = (LLUUID)comps[0];
+
+            m_log.DebugFormat("{0} GET region UUID {1}", MsgID, regionID.ToString());
+
+            if (LLUUID.Zero == regionID) throw new Exception("missing region ID");
+
+            Scene scene = null;
+            App.SceneManager.TryGetScene(regionID, out scene);
+            if (null == scene) return Failure("GET", "cannot find region");
+
+            RegionDetails details = new RegionDetails(scene.RegionInfo);
+
+            // m_log.DebugFormat("{0} GET comps {1}", MsgID, comps.Length);
+            // for (int i = 0; i < comps.Length; i++)  m_log.DebugFormat("{0} GET comps[{1}] >{2}<", MsgID, i, comps[i]);
+
+            if (1 == comps.Length)
+            {
+                // complete region details requested
+                XmlSerializer xs = new XmlSerializer(typeof(RegionDetails));
+                xs.Serialize(XmlWriter, details);
+                return XmlWriterResult;
+            }
+
+            if (2 == comps.Length) {
+                string resp = ShortRegionInfo(comps[1], details[comps[1]]);
+                if (null != resp) return resp;
+
+                // m_log.DebugFormat("{0} GET comps advanced: >{1}<", MsgID, comps[1]);
+
+                // check for {terrain,stats,prims}
+                switch (comps[1].ToLower()) 
+                {
+                case "terrain":
+                    return RegionTerrain(scene);
+
+                case "stats":
+                    return RegionStats(scene);
+
+                case "prims":
+                    return RegionPrims(scene);
+                }
+            }
+            return Failure("GET", "too many parameters");
+        }
+        #endregion GET methods
+
+        protected string RegionTerrain(Scene scene)
+        {
+            return Failure("GET", "terrain not implemented");
+        }
+
+        protected string RegionStats(Scene scene)
+        {
+            int users = scene.GetAvatars().Count;
+            int objects = scene.Entities.Count - users;
+
+            XmlWriter.WriteStartElement(String.Empty, "region", String.Empty);
+            XmlWriter.WriteStartElement(String.Empty, "stats", String.Empty);
+
+            XmlWriter.WriteStartElement(String.Empty, "users", String.Empty);
+            XmlWriter.WriteString(users.ToString());
+            XmlWriter.WriteEndElement();
+                
+            XmlWriter.WriteStartElement(String.Empty, "objects", String.Empty);
+            XmlWriter.WriteString(objects.ToString());
+            XmlWriter.WriteEndElement();
+
+            XmlWriter.WriteEndDocument();
+            
+            return XmlWriterResult;
+        }
+
+        protected string RegionPrims(Scene scene)
+        {
+            return Failure("GET", "prims not implemented");
+        }
+    }
+}

OpenSim/ApplicationPlugins/Rest/Regions/RegionDetails.cs

@@ -68,5 +68,35 @@ namespace OpenSim.ApplicationPlugins.Rest.Regions
                 region_owner = String.Format("{0} {1}", regInfo.MasterAvatarFirstName, 
                                              regInfo.MasterAvatarLastName);
         }
+
+        public string this[string idx]
+        {
+            get 
+            {
+                switch(idx.ToLower())
+                {
+                case "name": 
+                    return region_name;
+                case "id": 
+                    return region_id;
+                case "location": 
+                    return String.Format("<x>{0}</x><y>{1}</y>", region_x, region_y);
+                case "owner": 
+                    return region_owner;
+                case "owner_id": 
+                    return region_owner_id;
+                case "http_port": 
+                    return region_http_port.ToString();
+                case "server_uri": 
+                    return region_server_uri;
+                case "external_hostname":
+                case "hostname": 
+                    return region_external_hostname;
+
+                default: 
+                    return null;
+                }
+            }
+        }
     }
 }

OpenSim/ApplicationPlugins/Rest/Regions/RestRegionPlugin.cs

@@ -55,11 +55,8 @@ namespace OpenSim.ApplicationPlugins.Rest.Regions
 {
 
     [Extension("/OpenSim/Startup")]
-    public class RestRegionPlugin : RestPlugin
+    public partial class RestRegionPlugin : RestPlugin
     {
-        private static readonly log4net.ILog  _log =
-            log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
-
         #region overriding properties
         public override string Name 
         { 
@@ -86,18 +83,20 @@ namespace OpenSim.ApplicationPlugins.Rest.Regions
             try
             {
                 base.Initialise(openSim);
-                if (IsEnabled)
+                if (!IsEnabled)                     
-                    m_log.InfoFormat("{0} Rest Plugins Enabled", MsgID);
+                {
-                else
                     m_log.WarnFormat("{0} Rest Plugins are disabled", MsgID);
+                    return;
+                }
+                m_log.InfoFormat("{0} REST region plugin enabled", MsgID);
 
                 // add REST method handlers
                 AddRestStreamHandler("GET", "/regions/", GetHandler);
             }
             catch (Exception e)
             {
-                _log.WarnFormat("{0} Initialization failed: {1}", MsgID, e.Message);
+                m_log.WarnFormat("{0} Initialization failed: {1}", MsgID, e.Message);
-                _log.DebugFormat("{0} Initialization failed: {1}", MsgID, e.ToString());
+                m_log.DebugFormat("{0} Initialization failed: {1}", MsgID, e.ToString());
             }
         }
 
@@ -105,58 +104,5 @@ namespace OpenSim.ApplicationPlugins.Rest.Regions
         {
         }
         #endregion overriding methods
-
-        #region methods
-        public string GetHandler(string request, string path, string param)
-        {
-            m_log.DebugFormat("{0} GET path {1} param {2}", MsgID, path, param);
-
-            // param empty: regions list
-            if (String.IsNullOrEmpty(param)) return GetHandlerRegions();
-
-            return GetHandlerRegion(param);
-        }
-
-        public string GetHandlerRegions()
-        {
-            StringWriter sw = new StringWriter();
-            XmlTextWriter xw = new XmlTextWriter(sw);
-            xw.Formatting = Formatting.Indented;
-
-            xw.WriteStartElement(String.Empty, "regions", String.Empty);
-            foreach (Scene s in App.SceneManager.Scenes)
-            {
-                xw.WriteStartElement(String.Empty, "uuid", String.Empty);
-                xw.WriteString(s.RegionInfo.RegionID.ToString());
-                xw.WriteEndElement();
-            }
-            xw.WriteEndElement();
-            xw.Close();
-
-            return sw.ToString();
-        }
-
-        public string GetHandlerRegion(string param)
-        {
-            string[] comps = param.Split('/');
-            LLUUID regionID = (LLUUID)comps[0];
-            _log.DebugFormat("{0} region UUID {1}", MsgID, regionID.ToString());
-
-            if (LLUUID.Zero == regionID) throw new Exception("missing region ID");
-
-            Scene scene = null;
-            App.SceneManager.TryGetScene(regionID, out scene);
-
-            XmlSerializer xs = new XmlSerializer(typeof(RegionDetails));
-            StringWriter sw = new StringWriter();
-            XmlTextWriter xw = new XmlTextWriter(sw);
-            xw.Formatting = Formatting.Indented;
-
-            xs.Serialize(xw, new RegionDetails(scene.RegionInfo));
-            xw.Close();
-
-            return sw.ToString();
-        }
-        #endregion methods
     }
 }

OpenSim/ApplicationPlugins/Rest/RestPlugin.cs

@@ -30,9 +30,11 @@ using System;
 using System.Threading;
 using System.Collections;
 using System.Collections.Generic;
+using System.IO;
 using System.Net;
 using System.Reflection;
 using System.Timers;
+using System.Xml;
 using libsecondlife;
 using Mono.Addins;
 using Nwc.XmlRpc;
@@ -61,7 +63,11 @@ namespace OpenSim.ApplicationPlugins.Rest
         private IConfig        _pluginConfig; // Configuration source: Plugin specific
         private OpenSimMain    _app;          // The 'server'
         private BaseHttpServer _httpd;        // The server's RPC interface
-        private string         _prefix;       // URL prefix below which all REST URLs are living
+        private string         _prefix;       // URL prefix below
+                                              // which all REST URLs
+                                              // are living
+        private StringWriter _sw = null;
+        private XmlTextWriter _xw = null;
 
         private string _godkey;
         private int    _reqk;
@@ -147,6 +153,29 @@ namespace OpenSim.ApplicationPlugins.Rest
         /// Return the config section name
         /// </summary>
         public abstract string ConfigName { get; }
+
+        public XmlTextWriter XmlWriter
+        {
+            get { 
+                if (null == _xw)
+                {
+                    _sw = new StringWriter();
+                    _xw = new XmlTextWriter(_sw);
+                    _xw.Formatting = Formatting.Indented;
+                }
+                return _xw; }
+        }
+
+        public string XmlWriterResult
+        {
+            get
+            {
+                _xw.Flush();
+                _xw = null;
+
+                return _sw.ToString();
+            }
+        }
         #endregion properties
 
 
@@ -188,6 +217,7 @@ namespace OpenSim.ApplicationPlugins.Rest
                 // Get plugin specific config
                 _pluginConfig = openSim.ConfigSource.Configs[ConfigName];
 
+                
                 m_log.InfoFormat("{0} Rest Plugins Enabled", MsgID);
             }
             catch (Exception e)
@@ -214,6 +244,8 @@ namespace OpenSim.ApplicationPlugins.Rest
 
         public void AddRestStreamHandler(string httpMethod, string path, RestMethod method)
         {
+            if (!IsEnabled) return;
+
             if (!path.StartsWith(_prefix)) 
             {
                 path = String.Format("{0}{1}", _prefix, path);
@@ -227,9 +259,11 @@ namespace OpenSim.ApplicationPlugins.Rest
         }
 
         
-        public bool VerifyGod(string key)
+        protected bool VerifyGod(string key)
         {
             if (String.IsNullOrEmpty(key)) return false;
+            if (!IsEnabled) return false;
+
             return key == _godkey;
         }
 
@@ -241,6 +275,20 @@ namespace OpenSim.ApplicationPlugins.Rest
             }
             _handlers = null;
         }
+
+        protected string Failure(string method, string message)
+        {
+            m_log.ErrorFormat("{0} {1} failed: {2}", MsgID, method, message);
+            return String.Format("<error>{0}</error>", message);
+        }
+
+        public string Failure(string method, Exception e)
+        {
+            m_log.DebugFormat("{0} {1} failed: {2}", MsgID, method, e.ToString());
+            m_log.ErrorFormat("{0} {1} failed: {2}", MsgID, method, e.Message);
+
+            return String.Format("<error>{0}</error>", e.Message);
+        }
         #endregion methods
     }
 }