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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 OpenSimulator 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.Linq;
- using System.Net;
- using System.Net.Mail;
- using System.Net.Security;
- using System.Reflection;
- using System.Text;
- using System.Threading;
- using System.Security.Cryptography.X509Certificates;
- using log4net;
- using Nini.Config;
- using OpenMetaverse;
- using OpenSim.Framework;
- using OpenSim.Framework.Servers;
- using OpenSim.Framework.Servers.HttpServer;
- using OpenSim.Region.Framework.Interfaces;
- using OpenSim.Region.Framework.Scenes;
- using Mono.Addins;
- /*****************************************************
- *
- * 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
- * it's 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 response size?
- * Configurable
- *
- * **************************************************/
- namespace OpenSim.Region.CoreModules.Scripting.HttpRequest
- {
- [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "HttpRequestModule")]
- public class HttpRequestModule : ISharedRegionModule, IHttpRequestModule
- {
- private object HttpListLock = new object();
- private int httpTimeout = 30000;
- private string m_name = "HttpScriptRequests";
- private string m_proxyurl = "";
- private string m_proxyexcepts = "";
- // <request id, HttpRequestClass>
- private Dictionary<UUID, HttpRequestClass> m_pendingRequests;
- private Scene m_scene;
- // private Queue<HttpRequestClass> rpcQueue = new Queue<HttpRequestClass>();
- public HttpRequestModule()
- {
- ServicePointManager.ServerCertificateValidationCallback +=ValidateServerCertificate;
- }
- public static bool ValidateServerCertificate(
- object sender,
- X509Certificate certificate,
- X509Chain chain,
- SslPolicyErrors sslPolicyErrors)
- {
- // If this is a web request we need to check the headers first
- // We may want to ignore SSL
- if (sender is HttpWebRequest)
- {
- HttpWebRequest Request = (HttpWebRequest)sender;
- ServicePoint sp = Request.ServicePoint;
- // We don't case about encryption, get out of here
- if (Request.Headers.Get("NoVerifyCert") != null)
- {
- return true;
- }
- // If there was an upstream cert verification error, bail
- if ((((int)sslPolicyErrors) & ~4) != 0)
- return false;
- // Check for policy and execute it if defined
- if (ServicePointManager.CertificatePolicy != null)
- {
- return ServicePointManager.CertificatePolicy.CheckValidationResult (sp, certificate, Request, 0);
- }
- return true;
- }
- // If it's not HTTP, trust .NET to check it
- if ((((int)sslPolicyErrors) & ~4) != 0)
- return false;
- return true;
- }
- #region IHttpRequestModule Members
- public UUID MakeHttpRequest(string url, string parameters, string body)
- {
- return UUID.Zero;
- }
- public UUID StartHttpRequest(uint localID, UUID itemID, string url, List<string> parameters, Dictionary<string, string> headers, string body)
- {
- UUID reqID = UUID.Random();
- HttpRequestClass htc = new HttpRequestClass();
- // Partial implementation: support for parameter flags needed
- // see http://wiki.secondlife.com/wiki/LlHTTPRequest
- //
- // Parameters are expected in {key, value, ... , key, value}
- if (parameters != null)
- {
- string[] parms = parameters.ToArray();
- for (int i = 0; i < parms.Length; i += 2)
- {
- switch (Int32.Parse(parms[i]))
- {
- case (int)HttpRequestConstants.HTTP_METHOD:
- htc.HttpMethod = parms[i + 1];
- break;
- case (int)HttpRequestConstants.HTTP_MIMETYPE:
- htc.HttpMIMEType = parms[i + 1];
- break;
- case (int)HttpRequestConstants.HTTP_BODY_MAXLENGTH:
- // TODO implement me
- break;
- case (int)HttpRequestConstants.HTTP_VERIFY_CERT:
- htc.HttpVerifyCert = (int.Parse(parms[i + 1]) != 0);
- break;
- case (int)HttpRequestConstants.HTTP_VERBOSE_THROTTLE:
- // TODO implement me
- break;
- case (int)HttpRequestConstants.HTTP_CUSTOM_HEADER:
- //Parameters are in pairs and custom header takes
- //arguments in pairs so adjust for header marker.
- ++i;
- //Maximum of 8 headers are allowed based on the
- //Second Life documentation for llHTTPRequest.
- for (int count = 1; count <= 8; ++count)
- {
- //Not enough parameters remaining for a header?
- if (parms.Length - i < 2)
- break;
- //Have we reached the end of the list of headers?
- //End is marked by a string with a single digit.
- //We already know we have at least one parameter
- //so it is safe to do this check at top of loop.
- if (Char.IsDigit(parms[i][0]))
- break;
- if (htc.HttpCustomHeaders == null)
- htc.HttpCustomHeaders = new List<string>();
- htc.HttpCustomHeaders.Add(parms[i]);
- htc.HttpCustomHeaders.Add(parms[i+1]);
- i += 2;
- }
- break;
- case (int)HttpRequestConstants.HTTP_PRAGMA_NO_CACHE:
- htc.HttpPragmaNoCache = (int.Parse(parms[i + 1]) != 0);
- break;
- }
- }
- }
- htc.LocalID = localID;
- htc.ItemID = itemID;
- htc.Url = url;
- htc.ReqID = reqID;
- htc.HttpTimeout = httpTimeout;
- htc.OutboundBody = body;
- htc.ResponseHeaders = headers;
- htc.proxyurl = m_proxyurl;
- htc.proxyexcepts = m_proxyexcepts;
- lock (HttpListLock)
- {
- m_pendingRequests.Add(reqID, htc);
- }
- htc.Process();
- return reqID;
- }
- public void StopHttpRequestsForScript(UUID id)
- {
- if (m_pendingRequests != null)
- {
- List<UUID> keysToRemove = null;
- lock (HttpListLock)
- {
- foreach (HttpRequestClass req in m_pendingRequests.Values)
- {
- if (req.ItemID == id)
- {
- req.Stop();
- if (keysToRemove == null)
- keysToRemove = new List<UUID>();
- keysToRemove.Add(req.ReqID);
- }
- }
- if (keysToRemove != null)
- keysToRemove.ForEach(keyToRemove => m_pendingRequests.Remove(keyToRemove));
- }
- }
- }
- /*
- * 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
- * finished. I thought about setting up a queue for this, but
- * it will need some refactoring and this works 'enough' right now
- */
- public IServiceRequest GetNextCompletedRequest()
- {
- lock (HttpListLock)
- {
- foreach (HttpRequestClass req in m_pendingRequests.Values)
- {
- if (req.Finished)
- return req;
- }
- }
- return null;
- }
- public void RemoveCompletedRequest(UUID id)
- {
- lock (HttpListLock)
- {
- HttpRequestClass tmpReq;
- if (m_pendingRequests.TryGetValue(id, out tmpReq))
- {
- tmpReq.Stop();
- tmpReq = null;
- m_pendingRequests.Remove(id);
- }
- }
- }
- #endregion
- #region ISharedRegionModule Members
- public void Initialise(IConfigSource config)
- {
- m_proxyurl = config.Configs["Startup"].GetString("HttpProxy");
- m_proxyexcepts = config.Configs["Startup"].GetString("HttpProxyExceptions");
- m_pendingRequests = new Dictionary<UUID, HttpRequestClass>();
- }
- public void AddRegion(Scene scene)
- {
- m_scene = scene;
- m_scene.RegisterModuleInterface<IHttpRequestModule>(this);
- }
- public void RemoveRegion(Scene scene)
- {
- scene.UnregisterModuleInterface<IHttpRequestModule>(this);
- if (scene == m_scene)
- m_scene = null;
- }
- public void PostInitialise()
- {
- }
- public void RegionLoaded(Scene scene)
- {
- }
- public void Close()
- {
- }
- public string Name
- {
- get { return m_name; }
- }
- public Type ReplaceableInterface
- {
- get { return null; }
- }
- #endregion
- }
- public class HttpRequestClass: IServiceRequest
- {
- // private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
- // Constants for parameters
- // public const int HTTP_BODY_MAXLENGTH = 2;
- // public const int HTTP_METHOD = 0;
- // public const int HTTP_MIMETYPE = 1;
- // public const int HTTP_VERIFY_CERT = 3;
- // public const int HTTP_VERBOSE_THROTTLE = 4;
- // public const int HTTP_CUSTOM_HEADER = 5;
- // public const int HTTP_PRAGMA_NO_CACHE = 6;
- private bool _finished;
- public bool Finished
- {
- get { return _finished; }
- }
- // public int HttpBodyMaxLen = 2048; // not implemented
- // Parameter members and default values
- public string HttpMethod = "GET";
- public string HttpMIMEType = "text/plain;charset=utf-8";
- public int HttpTimeout;
- public bool HttpVerifyCert = true;
- //public bool HttpVerboseThrottle = true; // not implemented
- public List<string> HttpCustomHeaders = null;
- public bool HttpPragmaNoCache = true;
- // Request info
- private UUID _itemID;
- public UUID ItemID
- {
- get { return _itemID; }
- set { _itemID = value; }
- }
- private uint _localID;
- public uint LocalID
- {
- get { return _localID; }
- set { _localID = value; }
- }
- public DateTime Next;
- public string proxyurl;
- public string proxyexcepts;
- public string OutboundBody;
- private UUID _reqID;
- public UUID ReqID
- {
- get { return _reqID; }
- set { _reqID = value; }
- }
- public WebRequest Request;
- public string ResponseBody;
- public List<string> ResponseMetadata;
- public Dictionary<string, string> ResponseHeaders;
- public int Status;
- public string Url;
- public void Process()
- {
- SendRequest();
- }
- public void SendRequest()
- {
- try
- {
- Request = WebRequest.Create(Url);
- Request.Method = HttpMethod;
- Request.ContentType = HttpMIMEType;
- if (!HttpVerifyCert)
- {
- // We could hijack Connection Group Name to identify
- // a desired security exception. But at the moment we'll use a dummy header instead.
- // Request.ConnectionGroupName = "NoVerify";
- Request.Headers.Add("NoVerifyCert", "true");
- }
- // else
- // {
- // Request.ConnectionGroupName="Verify";
- // }
- if (!HttpPragmaNoCache)
- {
- Request.Headers.Add("Pragma", "no-cache");
- }
- if (HttpCustomHeaders != null)
- {
- for (int i = 0; i < HttpCustomHeaders.Count; i += 2)
- Request.Headers.Add(HttpCustomHeaders[i],
- HttpCustomHeaders[i+1]);
- }
- if (!string.IsNullOrEmpty(proxyurl))
- {
- if (!string.IsNullOrEmpty(proxyexcepts))
- {
- string[] elist = proxyexcepts.Split(';');
- Request.Proxy = new WebProxy(proxyurl, true, elist);
- }
- else
- {
- Request.Proxy = new WebProxy(proxyurl, true);
- }
- }
- if (ResponseHeaders != null)
- {
- foreach (KeyValuePair<string, string> entry in ResponseHeaders)
- if (entry.Key.ToLower().Equals("user-agent") && Request is HttpWebRequest)
- ((HttpWebRequest)Request).UserAgent = entry.Value;
- else
- Request.Headers[entry.Key] = entry.Value;
- }
- // Encode outbound data
- if (!string.IsNullOrEmpty(OutboundBody))
- {
- byte[] data = Util.UTF8.GetBytes(OutboundBody);
- Request.ContentLength = data.Length;
- Stream bstream = Request.GetRequestStream();
- bstream.Write(data, 0, data.Length);
- bstream.Close();
- }
- try
- {
- IAsyncResult result = (IAsyncResult)Request.BeginGetResponse(ResponseCallback, null);
- ThreadPool.RegisterWaitForSingleObject(
- result.AsyncWaitHandle, new WaitOrTimerCallback(TimeoutCallback), null, HttpTimeout, true);
- }
- catch (WebException e)
- {
- if (e.Status != WebExceptionStatus.ProtocolError)
- {
- throw;
- }
- HttpWebResponse response = (HttpWebResponse)e.Response;
- Status = (int)response.StatusCode;
- ResponseBody = response.StatusDescription;
- _finished = true;
- }
- }
- catch (Exception e)
- {
- // m_log.Debug(
- // string.Format("[SCRIPTS HTTP REQUESTS]: Exception on request to {0} for {1} ", Url, ItemID), e);
- Status = (int)OSHttpStatusCode.ClientErrorJoker;
- ResponseBody = e.Message;
- _finished = true;
- }
- }
- private void ResponseCallback(IAsyncResult ar)
- {
- HttpWebResponse response = null;
- try
- {
- try
- {
- response = (HttpWebResponse)Request.EndGetResponse(ar);
- }
- catch (WebException e)
- {
- if (e.Status != WebExceptionStatus.ProtocolError)
- {
- throw;
- }
- response = (HttpWebResponse)e.Response;
- }
- Status = (int)response.StatusCode;
- using (Stream stream = response.GetResponseStream())
- {
- StreamReader reader = new StreamReader(stream, Encoding.UTF8);
- ResponseBody = reader.ReadToEnd();
- }
- }
- catch (Exception e)
- {
- Status = (int)OSHttpStatusCode.ClientErrorJoker;
- ResponseBody = e.Message;
- // m_log.Debug(
- // string.Format("[SCRIPTS HTTP REQUESTS]: Exception on response to {0} for {1} ", Url, ItemID), e);
- }
- finally
- {
- if (response != null)
- response.Close();
- _finished = true;
- }
- }
- private void TimeoutCallback(object state, bool timedOut)
- {
- if (timedOut)
- Request.Abort();
- }
- public void Stop()
- {
- // m_log.DebugFormat("[SCRIPTS HTTP REQUESTS]: Stopping request to {0} for {1} ", Url, ItemID);
- if (Request != null)
- Request.Abort();
- }
- }
- }
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