Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / HttpDebugHandler.cs / 1 / HttpDebugHandler.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * Handler for DEBUG verb * * Copyright (c) 2000 Microsoft Corporation */ namespace System.Web { using System.Configuration; using System.Globalization; using System.IO; using System.Runtime.InteropServices; using System.Text; using System.Web.Configuration; using System.Web.Hosting; using System.Web.Util; /* This is just a temporary code to get some timings for the Http Debug request. To enable it, add the following to the app's "web.config" file:*/ using System.Collections; #if PERF internal class HttpDebugHandlerTimeLog { private static int initialTick = 0; private static int isEnabled = -1; private static StreamWriter writer = null; private static FileStream fstream = null; private HttpDebugHandlerTimeLog() { } private static bool IsEnabled { get { if (isEnabled == -1) { // Else check to see if config settings enables it Hashtable h = (Hashtable) WebConfigurationManager.GetWebApplicationSection("httpDebug"); if (h != null) { string s = (string) h["enable"]; if ((s != null) && (s == "1")) { // Open file handle if needed try { string filename = (string) h["path"]; if (filename != null) { fstream = new FileStream(filename, FileMode.Create, FileAccess.ReadWrite, FileShare.Read); writer = new StreamWriter(fstream); isEnabled = 1; } } catch { isEnabled = 0; Close(); } } } // If still undecided here, then it's off if (isEnabled == -1) { isEnabled = 0; } } return (isEnabled == 1) ? true : false; } } internal static void Close() { if (writer != null) { writer.Flush(); writer.Close(); writer = null; } if (fstream != null) { fstream.Close(); fstream = null; } } internal static void PrintTickDelta(string s) { if (! IsEnabled) { return; } if (initialTick == 0) { initialTick = Environment.TickCount; SafeNativeMethods.OutputDebugString(s + " : " + initialTick + " (HttpDebugHandler + 0)\n"); if (writer != null) { writer.WriteLine(s + " : " + initialTick + " (HttpDebugHandler + 0)"); } } else { int curTick = Environment.TickCount; SafeNativeMethods.OutputDebugString(s + " : " + curTick + " (HttpDebugHandler + " + (curTick - initialTick) + ")\n"); if (writer != null) { writer.WriteLine(s + " : " + curTick + " (HttpDebugHandler + " + (curTick - initialTick) + ")"); } } } } #endif /// /// internal class HttpDebugHandler : IHttpHandler { private static string[] validClsIds = {"{70f65411-fe8c-4248-bcff-701c8b2f4529}", "{62a78ac2-7d9a-4377-b97e-6965919fdd02}", "{cc23651f-4574-438f-b4aa-bcb28b6b3ecf}", "{dbfdb1d0-04a4-4315-b15c-f874f6b6e90b}", "{a4fcb474-2687-4924-b0ad-7caf331db826}", "{beb261f6-d5f0-43ba-baf4-8b79785fffaf}", "{8e2f5e28-d4e2-44c0-aa02-f8c5beb70cac}", "{08100915-0f41-4ccf-9564-ebaa5d49446c}"}; internal HttpDebugHandler () { } ///Handler for debugging operations. ////// public void ProcessRequest(HttpContext context) { // Debugging must be enabled try { #if PERF HttpDebugHandlerTimeLog.PrintTickDelta("Entered HttpDebugHandler"); #endif if (!HttpRuntime.DebuggingEnabled) { context.Response.Write(SR.GetString(SR.Debugging_forbidden, context.Request.Path)); context.Response.StatusCode = 403; return; } // Check to see if it's a valid debug command. string command = context.Request.Headers["Command"]; if (command == null) { Debug.Trace("AutoAttach", "No debug command!!"); context.Response.Write(SR.GetString(SR.Invalid_Debug_Request)); context.Response.StatusCode = 500; return; } Debug.Trace("AutoAttach", "Debug command: " + command); if (StringUtil.EqualsIgnoreCase(command, "stop-debug")) { context.Response.Write("OK"); return; } if (!StringUtil.EqualsIgnoreCase(command, "start-debug")) { context.Response.Write(SR.GetString(SR.Invalid_Debug_Request)); context.Response.StatusCode = 500; return; } // Request must be NTLM authenticated string authType = context.WorkerRequest.GetServerVariable("AUTH_TYPE"); // go the metal string logonUser = context.WorkerRequest.GetServerVariable("LOGON_USER"); Debug.Trace("AutoAttach", "Authentication type string: " + ((authType != null) ? authType : "NULL")); Debug.Trace("AutoAttach", "Logon user string: " + ((logonUser != null) ? logonUser : "NULL")); if (String.IsNullOrEmpty(logonUser) || String.IsNullOrEmpty(authType) || StringUtil.EqualsIgnoreCase(authType, "basic")) { Debug.Trace("AutoAttach", "Invalid logon_user or auth_type string."); context.Response.Write(SR.GetString(SR.Debug_Access_Denied, context.Request.Path)); context.Response.StatusCode = 401; return; } // Get the session ID String sessId = context.Request.Form["DebugSessionID"]; Debug.Trace("AutoAttach", "DebugSessionID: " + ((sessId != null) ? sessId : "NULL")); if (String.IsNullOrEmpty(sessId)) { context.Response.Write(SR.GetString(SR.Invalid_Debug_ID)); context.Response.StatusCode = 500; return; } string s = sessId.Replace(';', '&'); HttpValueCollection valCol = new HttpValueCollection(s, true, true, Encoding.UTF8); string clsId = (string) valCol["autoattachclsid"]; // Verify clsId bool isClsIdOk = false; if (clsId != null) { for (int i = 0; i < validClsIds.Length; i++) { if (StringUtil.EqualsIgnoreCase(clsId, validClsIds[i])) { isClsIdOk = true; break; } } } if (isClsIdOk == false) { context.Response.Write(SR.GetString(SR.Debug_Access_Denied, context.Request.Path)); context.Response.StatusCode = 401; Debug.Trace("AutoAttach", "Debug attach not attempted because of invalid CLSID."); return; } // Attach the debugger #if PERF HttpDebugHandlerTimeLog.PrintTickDelta("About to call into MDM"); #endif int rc = UnsafeNativeMethods.AttachDebugger(clsId, sessId, context.WorkerRequest.GetUserToken()); #if PERF HttpDebugHandlerTimeLog.PrintTickDelta("Returned from call to MDM"); #endif // If it's not S_OK, then we got a problem if (rc != 0) { Debug.Trace("AutoAttach", "Debug attach failed! Return code: " + rc); context.Response.Write(SR.GetString(SR.Error_Attaching_with_MDM, "0x" + rc.ToString("X8", CultureInfo.InvariantCulture))); context.Response.StatusCode = 500; return; } Debug.Trace("AutoAttach", "Debug attach successful!"); // Everything ok -- increment counter, return something (not 204) PerfCounters.IncrementCounter(AppPerfCounter.DEBUGGING_REQUESTS); context.Response.Write("OK"); } finally { Debug.Trace("AutoAttach","Http Debug attach done!"); #if PERF HttpDebugHandlerTimeLog.PrintTickDelta("Leaving HttpDebugHandler"); HttpDebugHandlerTimeLog.Close(); #endif } } ///Drives web processing execution. ////// public bool IsReusable { get { return true; } } } }Indicates whether an HttpDebugHandler instance can be recycled and used for /// another request. ///
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