C# OSHttpResponse.FreeContext方法代码示例

//.........这里部分代码省略.........
            OSD llsdRequest = null;
            OSD llsdResponse = null;
            
            bool LegacyLLSDLoginLibOMV = (requestBody.Contains("passwd") && requestBody.Contains("mac") && requestBody.Contains("viewer_digest"));
            
            if (requestBody.Length == 0)
            // Get Request
            {
                requestBody = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><llsd><map><key>request</key><string>get</string></map></llsd>"; 
            }
            try
            {
                llsdRequest = OSDParser.Deserialize(requestBody);
            }
            catch (Exception ex)
            {
                m_log.Warn("[HTTPD]: Error - " + ex.Message);
            }

            if (llsdRequest != null)// && m_defaultLlsdHandler != null)
            {

                LLSDMethod llsdhandler = null;

                if (TryGetLLSDHandler(request.RawUrl, out llsdhandler) && !LegacyLLSDLoginLibOMV)
                {
                    // we found a registered llsd handler to service this request
                    llsdResponse = llsdhandler(request.RawUrl, llsdRequest, request.RemoteIPEndPoint.ToString());
                }
                else
                {
                    // we didn't find a registered llsd handler to service this request
                    // check if we have a default llsd handler

                    if (m_defaultLlsdHandler != null)
                    {
                        // LibOMV path
                        llsdResponse = m_defaultLlsdHandler(llsdRequest, request.RemoteIPEndPoint);
                    }
                    else
                    {
                        // Oops, no handler for this..   give em the failed message
                        llsdResponse = GenerateNoLLSDHandlerResponse();
                    }
                }

            }
            else
            {
                llsdResponse = GenerateNoLLSDHandlerResponse();
            }
            byte[] buffer = new byte[0];
            if (llsdResponse.ToString() == "shutdown404!")
            {
                response.ContentType = "text/plain";
                response.StatusCode = 404;
                response.StatusDescription = "Not Found";
                response.ProtocolVersion = "HTTP/1.0";
                buffer = Encoding.UTF8.GetBytes("Not found");
            }
            else
            {
                // Select an appropriate response format
                buffer = BuildLLSDResponse(request, response, llsdResponse);
            }

            response.SendChunked = false;
            response.ContentLength64 = buffer.Length;
            response.ContentEncoding = Encoding.UTF8;
            response.KeepAlive = true;

            try
            {
                response.OutputStream.Write(buffer, 0, buffer.Length);
            }
            catch (Exception ex)
            {
                m_log.Warn("[HTTPD]: Error - " + ex.Message);
            }
            finally
            {
                //response.OutputStream.Close();
                try
                {
                    response.Send();
                    response.OutputStream.Flush();
                    response.FreeContext();
                    //response.OutputStream.Close();
                }
                catch (IOException e)
                {
                    m_log.DebugFormat("[BASE HTTP SERVER] LLSD IOException {0}.", e);                    
                }
                catch (SocketException e)
                {
                    // This has to be here to prevent a Linux/Mono crash
                    m_log.WarnFormat("[BASE HTTP SERVER] LLSD issue {0}.\nNOTE: this may be spurious on Linux.", e);
                }
            }
        }

//.........这里部分代码省略.........

                        using (MemoryStream memoryStream = new MemoryStream())
                        {
                            streamHandler.Handle(path, request.InputStream, memoryStream, request, response);
                            memoryStream.Flush();
                            buffer = memoryStream.ToArray();
                        }
                    }

                    request.InputStream.Close();
                    
                    // HTTP IN support. The script engine taes it from here
                    // Nothing to worry about for us.
                    //
                    if (buffer == null)
                        return;

                    if (!response.SendChunked)
                        response.ContentLength64 = buffer.LongLength;

                    try
                    {
                        response.OutputStream.Write(buffer, 0, buffer.Length);
                        //response.OutputStream.Close();
                    }
                    catch (HttpListenerException)
                    {
                        m_log.WarnFormat("[BASE HTTP SERVER]: HTTP request abnormally terminated.");
                    }
                    //response.OutputStream.Close();
                    try
                    {
                        response.Send();
                        response.FreeContext();
                    }
                    catch (SocketException e)
                    {
                        // This has to be here to prevent a Linux/Mono crash
                        m_log.WarnFormat("[BASE HTTP SERVER] XmlRpcRequest issue {0}.\nNOTE: this may be spurious on Linux.", e);
                    }
                    catch (IOException e)
                    {
                        m_log.Warn("[BASE HTTP SERVER] XmlRpcRequest issue: " + e.Message);
                    }
                    return;
                }

                if (request.AcceptTypes != null && request.AcceptTypes.Length > 0)
                {
                    foreach (string strAccept in request.AcceptTypes)
                    {
                        if (strAccept.Contains("application/llsd+xml") ||
                            strAccept.Contains("application/llsd+json"))
                        {
                            //m_log.Info("[Debug BASE HTTP SERVER]: Found an application/llsd+xml accept header");
                            HandleLLSDRequests(request, response);
                            return;
                        }
                    }
                }

                switch (request.ContentType)
                {
                    case null:
                    case "text/html":
                        //m_log.Info("[Debug BASE HTTP SERVER]: found a text/html content type");

        internal void DoHTTPGruntWork(Hashtable responsedata, OSHttpResponse response)
        {
            //m_log.Info("[BASE HTTP SERVER]: Doing HTTP Grunt work with response");
            int responsecode = (int)responsedata["int_response_code"];
            string responseString = (string)responsedata["str_response_string"];
            string contentType = (string)responsedata["content_type"];


            if (responsedata.ContainsKey("error_status_text"))
            {
                response.StatusDescription = (string)responsedata["error_status_text"];
            }
            if (responsedata.ContainsKey("http_protocol_version"))
            {
                response.ProtocolVersion = (string)responsedata["http_protocol_version"];
            }

            if (responsedata.ContainsKey("keepalive"))
            {
                bool keepalive = (bool)responsedata["keepalive"];
                response.KeepAlive = keepalive;

            }

            if (responsedata.ContainsKey("reusecontext"))
                response.ReuseContext = (bool) responsedata["reusecontext"];

            //Even though only one other part of the entire code uses HTTPHandlers, we shouldn't expect this
            //and should check for NullReferenceExceptions
            
            if (string.IsNullOrEmpty(contentType))
            {
                contentType = "text/html";
            }

            // The client ignores anything but 200 here for web login, so ensure that this is 200 for that

            response.StatusCode = responsecode;

            if (responsecode == (int)OSHttpStatusCode.RedirectMovedPermanently)
            {
                response.RedirectLocation = (string)responsedata["str_redirect_location"];
                response.StatusCode = responsecode;
            }

            response.AddHeader("Content-Type", contentType);

            byte[] buffer;

            if (!(contentType.Contains("image") 
                || contentType.Contains("x-shockwave-flash") 
                || contentType.Contains("application/x-oar")))
            {
                // Text
                buffer = Encoding.UTF8.GetBytes(responseString);
            }
            else
            {
                // Binary!
                buffer = Convert.FromBase64String(responseString);
            }

            response.SendChunked = false;
            response.ContentLength64 = buffer.Length;
            response.ContentEncoding = Encoding.UTF8;

            try
            {
                response.OutputStream.Write(buffer, 0, buffer.Length);
            }
            catch (Exception ex)
            {
                m_log.Warn("[HTTPD]: Error - " + ex.Message);
            }
            finally
            {
                //response.OutputStream.Close();
                try
                {
                    response.OutputStream.Flush();
                    response.Send();
                    
                    if (!response.KeepAlive && response.ReuseContext)
                        response.FreeContext();
                }
                catch (SocketException e)
                {
                    // This has to be here to prevent a Linux/Mono crash
                    m_log.WarnFormat("[BASE HTTP SERVER] XmlRpcRequest issue {0}.\nNOTE: this may be spurious on Linux.", e);
                }
                catch (IOException e)
                {
                    m_log.Warn("[BASE HTTP SERVER] XmlRpcRequest issue: " + e.Message);
                }
            }            
        }

        public void SendHTML500(OSHttpResponse response)
        {
            // I know this statuscode is dumb, but the client doesn't respond to 404s and 500s
            response.StatusCode = (int)OSHttpStatusCode.SuccessOk;
            response.AddHeader("Content-type", "text/html");

            string responseString = GetHTTP500();
            byte[] buffer = Encoding.UTF8.GetBytes(responseString);

            response.SendChunked = false;
            response.ContentLength64 = buffer.Length;
            response.ContentEncoding = Encoding.UTF8;
            try
            {
                response.OutputStream.Write(buffer, 0, buffer.Length);
            }
            catch (Exception ex)
            {
                m_log.Warn("[HTTPD]: Error - " + ex.Message);
            }
            finally
            {
                //response.OutputStream.Close();
                try
                {
                    response.Send();
                    response.FreeContext();
                }
                catch (SocketException e)
                {
                    // This has to be here to prevent a Linux/Mono crash
                    m_log.WarnFormat("[BASE HTTP SERVER] XmlRpcRequest issue {0}.\nNOTE: this may be spurious on Linux.", e);
                }
            }
        }

        /// <summary>
        /// A specific agent handler was provided. Such a handler is expecetd to have an
        /// intimate, and highly specific relationship with the client. Consequently,
        /// nothing is done here.
        /// </summary>
        /// <param name="handler"></param>
        /// <param name="request"></param>
        /// <param name="response"></param>

        private bool HandleAgentRequest(IHttpAgentHandler handler, OSHttpRequest request, OSHttpResponse response)
        {
            // In the case of REST, then handler is responsible for ALL aspects of
            // the request/response handling. Nothing is done here, not even encoding.

            try
            {
                return handler.Handle(request, response);
            }
            catch (Exception e)
            {
                // If the handler did in fact close the stream, then this will blow
                // chunks. So that that doesn't disturb anybody we throw away any
                // and all exceptions raised. We've done our best to release the
                // client.
                try
                {
                    m_log.Warn("[HTTP-AGENT]: Error - " + e.Message);
                    response.SendChunked   = false;
                    response.KeepAlive     = true;
                    response.StatusCode    = (int)OSHttpStatusCode.ServerErrorInternalError;
                    //response.OutputStream.Close();
                    try
                    {
                        response.Send();
                        response.FreeContext();
                    }
                    catch (SocketException f)
                    {
                        // This has to be here to prevent a Linux/Mono crash
                        m_log.WarnFormat(
                            "[BASE HTTP SERVER]: XmlRpcRequest issue {0}.\nNOTE: this may be spurious on Linux.", f);
                    }
                }
                catch(Exception)
                {
                }
            }

            // Indicate that the request has been "handled"

            return true;

        }