Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / xsp / System / Web / DataAccess / SqlConnectionHelper.cs / 1 / SqlConnectionHelper.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Web.DataAccess {
using System;
using System.Globalization;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections.Specialized;
using System.Web.Util;
using System.Web.Hosting;
using System.Web.Configuration;
using System.Security.Permissions;
using System.IO;
using System.Web.Management;
using System.Threading;
using System.Configuration.Provider;
using System.Diagnostics;
using System.Data;
///
///
internal static class SqlConnectionHelper
{
internal const string s_strDataDir = "DataDirectory";
internal const string s_strUpperDataDirWithToken = "|DATADIRECTORY|";
internal const string s_strSqlExprFileExt = ".MDF";
internal const string s_strUpperUserInstance = "USER INSTANCE";
private static object s_lock = new object();
///
///
internal static SqlConnectionHolder GetConnection ( string connectionString, bool revertImpersonation)
{
string strTempConnection = connectionString.ToUpperInvariant();
if (strTempConnection.Contains(s_strUpperDataDirWithToken))
EnsureSqlExpressDBFile( connectionString );
SqlConnectionHolder holder = new SqlConnectionHolder(connectionString);
bool closeConn = true;
try
{
try
{
holder.Open(null, revertImpersonation);
closeConn = false;
}
finally
{
if (closeConn)
{
holder.Close();
holder = null;
}
}
}
catch
{
throw;
}
return holder;
}
///
///
internal static string GetConnectionString (string specifiedConnectionString, bool lookupConnectionString, bool appLevel)
{
System.Web.Util.Debug.Assert((specifiedConnectionString != null) && (specifiedConnectionString.Length != 0));
if (specifiedConnectionString == null || specifiedConnectionString.Length < 1)
return null;
string connectionString = null;
/////////////////////////////////////////
// Step 1: Check config section for this connection string
if (lookupConnectionString)
{
RuntimeConfig config = (appLevel) ? RuntimeConfig.GetAppConfig() : RuntimeConfig.GetConfig();
ConnectionStringSettings connObj = config.ConnectionStrings.ConnectionStrings[specifiedConnectionString];
if (connObj != null)
connectionString = connObj.ConnectionString;
if (connectionString == null)
return null;
//HandlerBase.CheckAndReadRegistryValue (ref connectionString, true);
}
else
{
connectionString = specifiedConnectionString;
}
return connectionString;
}
[PermissionSet(SecurityAction.Assert, Unrestricted = true)]
internal static string GetDataDirectory()
{
if (HostingEnvironment.IsHosted)
return Path.Combine(HttpRuntime.AppDomainAppPath, HttpRuntime.DataDirectoryName);
string dataDir = AppDomain.CurrentDomain.GetData(s_strDataDir) as string;
if( string.IsNullOrEmpty(dataDir))
{
string appPath = null;
#if !FEATURE_PAL // FEATURE_PAL does not support ProcessModule
Process p = Process.GetCurrentProcess();
ProcessModule pm = ( p != null ? p.MainModule : null );
string exeName = ( pm != null ? pm.FileName : null);
if (!string.IsNullOrEmpty(exeName))
appPath = Path.GetDirectoryName( exeName );
#endif // !FEATURE_PAL
if (string.IsNullOrEmpty(appPath))
appPath = Environment.CurrentDirectory;
dataDir = Path.Combine(appPath, HttpRuntime.DataDirectoryName);
AppDomain.CurrentDomain.SetData(s_strDataDir, dataDir, new FileIOPermission(FileIOPermissionAccess.PathDiscovery, dataDir));
}
return dataDir;
}
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
private static void EnsureSqlExpressDBFile(string connectionString)
{
string partialFileName = null;
string fullFileName = null;
string dataDir = GetDataDirectory();
bool lookingForDataDir = true;
bool lookingForDB = true;
string[] splitedConnStr = connectionString.Split(new char[] {';'}, StringSplitOptions.RemoveEmptyEntries);
bool lookingForUserInstance = true;
bool lookingForTimeout = true;
foreach( string str in splitedConnStr )
{
string strUpper = str.ToUpper(CultureInfo.InvariantCulture).Trim();
if (lookingForDataDir && strUpper.Contains(s_strUpperDataDirWithToken))
{
lookingForDataDir = false;
// Replace the AttachDBFilename part with "Pooling=false"
connectionString = connectionString.Replace(str, "Pooling=false");
// Extract the filenames
int startPos = strUpper.IndexOf(s_strUpperDataDirWithToken, StringComparison.Ordinal) + s_strUpperDataDirWithToken.Length;
partialFileName = strUpper.Substring(startPos).Trim();
while(partialFileName.StartsWith("\\", StringComparison.Ordinal))
partialFileName = partialFileName.Substring(1);
if (partialFileName.Contains("..")) // don't allow it to traverse-up
partialFileName = null;
else
fullFileName = Path.Combine(dataDir, partialFileName);
if (!lookingForDB)
break; // done
}
else if (lookingForDB && (strUpper.StartsWith( "INITIAL CATALOG", StringComparison.Ordinal ) || strUpper.StartsWith( "DATABASE", StringComparison.Ordinal )))
{
lookingForDB = false;
connectionString = connectionString.Replace(str, "Database=master" );
if (!lookingForDataDir)
break; // done
}
else if (lookingForUserInstance && strUpper.StartsWith(s_strUpperUserInstance, StringComparison.Ordinal))
{
lookingForUserInstance = false;
int pos = strUpper.IndexOf('=');
if (pos < 0)
return;
string strTemp = strUpper.Substring(pos + 1).Trim();
if (strTemp != "TRUE")
return;
} else if (lookingForTimeout && strUpper.StartsWith("CONNECT TIMEOUT", StringComparison.Ordinal)) {
lookingForTimeout = false;
}
}
if (lookingForUserInstance)
return;
if (fullFileName == null)
throw new ProviderException(SR.GetString(SR.SqlExpress_file_not_found_in_connection_string));
if (File.Exists(fullFileName))
return;
if (!HttpRuntime.HasAspNetHostingPermission(AspNetHostingPermissionLevel.High))
throw new ProviderException(SR.GetString(SR.Provider_can_not_create_file_in_this_trust_level));
if (!connectionString.Contains("Database=master"))
connectionString += ";Database=master";
if (lookingForTimeout)
connectionString += ";Connect Timeout=45";
using (new ApplicationImpersonationContext())
lock (s_lock)
if (!File.Exists(fullFileName))
CreateMdfFile(fullFileName, dataDir, connectionString);
}
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
[PermissionSet(SecurityAction.Assert, Unrestricted = true)]
private static void CreateMdfFile(string fullFileName, string dataDir, string connectionString)
{
bool creatingDir = false;
string databaseName = null;
HttpContext context = HttpContext.Current;
string tempFileName = null;
try {
if (!Directory.Exists(dataDir)) {
creatingDir = true;
Directory.CreateDirectory( dataDir );
creatingDir = false;
try {
if(context != null )
HttpRuntime.RestrictIISFolders(context);
} catch {}
}
fullFileName = fullFileName.ToUpper(CultureInfo.InvariantCulture);
char [] strippedFileNameChars = Path.GetFileNameWithoutExtension(fullFileName).ToCharArray();
for (int iter = 0; iter < strippedFileNameChars.Length; iter++)
if (!char.IsLetterOrDigit(strippedFileNameChars[iter]))
strippedFileNameChars[iter] = '_';
string strippedFileName = new string(strippedFileNameChars);
if (strippedFileName.Length > 30)
databaseName = strippedFileName.Substring(0, 30) + "_" + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
else
databaseName = strippedFileName + "_" + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
tempFileName = Path.Combine(Path.GetDirectoryName(fullFileName), strippedFileName + "_TMP" + s_strSqlExprFileExt);
// Auto create the temporary database
SqlServices.Install( databaseName, tempFileName, connectionString );
DetachDB(databaseName, connectionString);
try {
File.Move(tempFileName, fullFileName);
} catch {
if (!File.Exists(fullFileName)) {
File.Copy(tempFileName, fullFileName);
try {
File.Delete(tempFileName);
} catch{}
}
}
try {
File.Delete(tempFileName.Replace("_TMP.MDF", "_TMP_log.LDF"));
} catch { }
} catch( Exception e ) {
if (context == null || context.IsCustomErrorEnabled)
throw;
HttpException httpExec = new HttpException(e.Message, e);
if (e is UnauthorizedAccessException)
httpExec.SetFormatter(new SqlExpressConnectionErrorFormatter(creatingDir ? DataConnectionErrorEnum.CanNotCreateDataDir : DataConnectionErrorEnum.CanNotWriteToDataDir));
else
httpExec.SetFormatter(new SqlExpressDBFileAutoCreationErrorFormatter(e));
throw httpExec;
}
}
private static void DetachDB(string databaseName, string connectionString)
{
SqlConnection connection = new SqlConnection(connectionString);
try {
connection.Open();
SqlCommand command = new SqlCommand("USE master", connection);
command.ExecuteNonQuery();
command = new SqlCommand("sp_detach_db", connection);
command.CommandType = CommandType.StoredProcedure;
command.Parameters.AddWithValue("@dbname", databaseName);
command.Parameters.AddWithValue("@skipchecks", "true");
command.ExecuteNonQuery();
} catch {
} finally {
connection.Close();
}
}
}
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
internal sealed class SqlConnectionHolder
{
internal SqlConnection _Connection;
private bool _Opened;
internal SqlConnection Connection
{
get{ return _Connection; }
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
internal SqlConnectionHolder ( string connectionString )
{
try
{
_Connection = new SqlConnection( connectionString );
System.Web.Util.Debug.Assert( _Connection != null );
}
catch( ArgumentException e )
{
throw new ArgumentException(SR.GetString(SR.SqlError_Connection_String), "connectionString", e);
}
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
internal void Open (HttpContext context, bool revertImpersonate)
{
if (_Opened)
return; // Already opened
if (revertImpersonate) {
using (new ApplicationImpersonationContext()) {
Connection.Open();
}
}
else {
Connection.Open();
}
_Opened = true; // Open worked!
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
internal void Close ()
{
if (!_Opened) // Not open!
return;
// Close connection
Connection.Close ();
_Opened = false;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Web.DataAccess {
using System;
using System.Globalization;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections.Specialized;
using System.Web.Util;
using System.Web.Hosting;
using System.Web.Configuration;
using System.Security.Permissions;
using System.IO;
using System.Web.Management;
using System.Threading;
using System.Configuration.Provider;
using System.Diagnostics;
using System.Data;
///
///
internal static class SqlConnectionHelper
{
internal const string s_strDataDir = "DataDirectory";
internal const string s_strUpperDataDirWithToken = "|DATADIRECTORY|";
internal const string s_strSqlExprFileExt = ".MDF";
internal const string s_strUpperUserInstance = "USER INSTANCE";
private static object s_lock = new object();
///
///
internal static SqlConnectionHolder GetConnection ( string connectionString, bool revertImpersonation)
{
string strTempConnection = connectionString.ToUpperInvariant();
if (strTempConnection.Contains(s_strUpperDataDirWithToken))
EnsureSqlExpressDBFile( connectionString );
SqlConnectionHolder holder = new SqlConnectionHolder(connectionString);
bool closeConn = true;
try
{
try
{
holder.Open(null, revertImpersonation);
closeConn = false;
}
finally
{
if (closeConn)
{
holder.Close();
holder = null;
}
}
}
catch
{
throw;
}
return holder;
}
///
///
internal static string GetConnectionString (string specifiedConnectionString, bool lookupConnectionString, bool appLevel)
{
System.Web.Util.Debug.Assert((specifiedConnectionString != null) && (specifiedConnectionString.Length != 0));
if (specifiedConnectionString == null || specifiedConnectionString.Length < 1)
return null;
string connectionString = null;
/////////////////////////////////////////
// Step 1: Check config section for this connection string
if (lookupConnectionString)
{
RuntimeConfig config = (appLevel) ? RuntimeConfig.GetAppConfig() : RuntimeConfig.GetConfig();
ConnectionStringSettings connObj = config.ConnectionStrings.ConnectionStrings[specifiedConnectionString];
if (connObj != null)
connectionString = connObj.ConnectionString;
if (connectionString == null)
return null;
//HandlerBase.CheckAndReadRegistryValue (ref connectionString, true);
}
else
{
connectionString = specifiedConnectionString;
}
return connectionString;
}
[PermissionSet(SecurityAction.Assert, Unrestricted = true)]
internal static string GetDataDirectory()
{
if (HostingEnvironment.IsHosted)
return Path.Combine(HttpRuntime.AppDomainAppPath, HttpRuntime.DataDirectoryName);
string dataDir = AppDomain.CurrentDomain.GetData(s_strDataDir) as string;
if( string.IsNullOrEmpty(dataDir))
{
string appPath = null;
#if !FEATURE_PAL // FEATURE_PAL does not support ProcessModule
Process p = Process.GetCurrentProcess();
ProcessModule pm = ( p != null ? p.MainModule : null );
string exeName = ( pm != null ? pm.FileName : null);
if (!string.IsNullOrEmpty(exeName))
appPath = Path.GetDirectoryName( exeName );
#endif // !FEATURE_PAL
if (string.IsNullOrEmpty(appPath))
appPath = Environment.CurrentDirectory;
dataDir = Path.Combine(appPath, HttpRuntime.DataDirectoryName);
AppDomain.CurrentDomain.SetData(s_strDataDir, dataDir, new FileIOPermission(FileIOPermissionAccess.PathDiscovery, dataDir));
}
return dataDir;
}
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
private static void EnsureSqlExpressDBFile(string connectionString)
{
string partialFileName = null;
string fullFileName = null;
string dataDir = GetDataDirectory();
bool lookingForDataDir = true;
bool lookingForDB = true;
string[] splitedConnStr = connectionString.Split(new char[] {';'}, StringSplitOptions.RemoveEmptyEntries);
bool lookingForUserInstance = true;
bool lookingForTimeout = true;
foreach( string str in splitedConnStr )
{
string strUpper = str.ToUpper(CultureInfo.InvariantCulture).Trim();
if (lookingForDataDir && strUpper.Contains(s_strUpperDataDirWithToken))
{
lookingForDataDir = false;
// Replace the AttachDBFilename part with "Pooling=false"
connectionString = connectionString.Replace(str, "Pooling=false");
// Extract the filenames
int startPos = strUpper.IndexOf(s_strUpperDataDirWithToken, StringComparison.Ordinal) + s_strUpperDataDirWithToken.Length;
partialFileName = strUpper.Substring(startPos).Trim();
while(partialFileName.StartsWith("\\", StringComparison.Ordinal))
partialFileName = partialFileName.Substring(1);
if (partialFileName.Contains("..")) // don't allow it to traverse-up
partialFileName = null;
else
fullFileName = Path.Combine(dataDir, partialFileName);
if (!lookingForDB)
break; // done
}
else if (lookingForDB && (strUpper.StartsWith( "INITIAL CATALOG", StringComparison.Ordinal ) || strUpper.StartsWith( "DATABASE", StringComparison.Ordinal )))
{
lookingForDB = false;
connectionString = connectionString.Replace(str, "Database=master" );
if (!lookingForDataDir)
break; // done
}
else if (lookingForUserInstance && strUpper.StartsWith(s_strUpperUserInstance, StringComparison.Ordinal))
{
lookingForUserInstance = false;
int pos = strUpper.IndexOf('=');
if (pos < 0)
return;
string strTemp = strUpper.Substring(pos + 1).Trim();
if (strTemp != "TRUE")
return;
} else if (lookingForTimeout && strUpper.StartsWith("CONNECT TIMEOUT", StringComparison.Ordinal)) {
lookingForTimeout = false;
}
}
if (lookingForUserInstance)
return;
if (fullFileName == null)
throw new ProviderException(SR.GetString(SR.SqlExpress_file_not_found_in_connection_string));
if (File.Exists(fullFileName))
return;
if (!HttpRuntime.HasAspNetHostingPermission(AspNetHostingPermissionLevel.High))
throw new ProviderException(SR.GetString(SR.Provider_can_not_create_file_in_this_trust_level));
if (!connectionString.Contains("Database=master"))
connectionString += ";Database=master";
if (lookingForTimeout)
connectionString += ";Connect Timeout=45";
using (new ApplicationImpersonationContext())
lock (s_lock)
if (!File.Exists(fullFileName))
CreateMdfFile(fullFileName, dataDir, connectionString);
}
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
[PermissionSet(SecurityAction.Assert, Unrestricted = true)]
private static void CreateMdfFile(string fullFileName, string dataDir, string connectionString)
{
bool creatingDir = false;
string databaseName = null;
HttpContext context = HttpContext.Current;
string tempFileName = null;
try {
if (!Directory.Exists(dataDir)) {
creatingDir = true;
Directory.CreateDirectory( dataDir );
creatingDir = false;
try {
if(context != null )
HttpRuntime.RestrictIISFolders(context);
} catch {}
}
fullFileName = fullFileName.ToUpper(CultureInfo.InvariantCulture);
char [] strippedFileNameChars = Path.GetFileNameWithoutExtension(fullFileName).ToCharArray();
for (int iter = 0; iter < strippedFileNameChars.Length; iter++)
if (!char.IsLetterOrDigit(strippedFileNameChars[iter]))
strippedFileNameChars[iter] = '_';
string strippedFileName = new string(strippedFileNameChars);
if (strippedFileName.Length > 30)
databaseName = strippedFileName.Substring(0, 30) + "_" + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
else
databaseName = strippedFileName + "_" + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
tempFileName = Path.Combine(Path.GetDirectoryName(fullFileName), strippedFileName + "_TMP" + s_strSqlExprFileExt);
// Auto create the temporary database
SqlServices.Install( databaseName, tempFileName, connectionString );
DetachDB(databaseName, connectionString);
try {
File.Move(tempFileName, fullFileName);
} catch {
if (!File.Exists(fullFileName)) {
File.Copy(tempFileName, fullFileName);
try {
File.Delete(tempFileName);
} catch{}
}
}
try {
File.Delete(tempFileName.Replace("_TMP.MDF", "_TMP_log.LDF"));
} catch { }
} catch( Exception e ) {
if (context == null || context.IsCustomErrorEnabled)
throw;
HttpException httpExec = new HttpException(e.Message, e);
if (e is UnauthorizedAccessException)
httpExec.SetFormatter(new SqlExpressConnectionErrorFormatter(creatingDir ? DataConnectionErrorEnum.CanNotCreateDataDir : DataConnectionErrorEnum.CanNotWriteToDataDir));
else
httpExec.SetFormatter(new SqlExpressDBFileAutoCreationErrorFormatter(e));
throw httpExec;
}
}
private static void DetachDB(string databaseName, string connectionString)
{
SqlConnection connection = new SqlConnection(connectionString);
try {
connection.Open();
SqlCommand command = new SqlCommand("USE master", connection);
command.ExecuteNonQuery();
command = new SqlCommand("sp_detach_db", connection);
command.CommandType = CommandType.StoredProcedure;
command.Parameters.AddWithValue("@dbname", databaseName);
command.Parameters.AddWithValue("@skipchecks", "true");
command.ExecuteNonQuery();
} catch {
} finally {
connection.Close();
}
}
}
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
internal sealed class SqlConnectionHolder
{
internal SqlConnection _Connection;
private bool _Opened;
internal SqlConnection Connection
{
get{ return _Connection; }
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
internal SqlConnectionHolder ( string connectionString )
{
try
{
_Connection = new SqlConnection( connectionString );
System.Web.Util.Debug.Assert( _Connection != null );
}
catch( ArgumentException e )
{
throw new ArgumentException(SR.GetString(SR.SqlError_Connection_String), "connectionString", e);
}
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
internal void Open (HttpContext context, bool revertImpersonate)
{
if (_Opened)
return; // Already opened
if (revertImpersonate) {
using (new ApplicationImpersonationContext()) {
Connection.Open();
}
}
else {
Connection.Open();
}
_Opened = true; // Open worked!
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
internal void Close ()
{
if (!_Opened) // Not open!
return;
// Close connection
Connection.Close ();
_Opened = false;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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