_WinHttpWebProxyDataBuilder.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Net / System / Net / _WinHttpWebProxyDataBuilder.cs / 1 / _WinHttpWebProxyDataBuilder.cs
                        
                        
                            using System; 
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
 
namespace System.Net
{ 
    internal sealed class WinHttpWebProxyBuilder : WebProxyDataBuilder 
    {
        protected override void BuildInternal() 
        {
            GlobalLog.Enter("WinHttpWebProxyBuilder#" + ValidationHelper.HashString(this) + "::BuildInternal()");

            UnsafeNclNativeMethods.WinHttp.WINHTTP_CURRENT_USER_IE_PROXY_CONFIG ieProxyConfig = 
                new UnsafeNclNativeMethods.WinHttp.WINHTTP_CURRENT_USER_IE_PROXY_CONFIG();
 
            if (UnsafeNclNativeMethods.WinHttp.WinHttpGetIEProxyConfigForCurrentUser(ref ieProxyConfig)) 
            {
                string proxy = null; 
                string proxyByPass = null;
                string autoConfigUrl = null;
                try
                { 
                    proxy = Marshal.PtrToStringUni(ieProxyConfig.Proxy);
                    proxyByPass = Marshal.PtrToStringUni(ieProxyConfig.ProxyBypass); 
                    autoConfigUrl = Marshal.PtrToStringUni(ieProxyConfig.AutoConfigUrl); 

                    // note that ieProxyConfig.Proxy will be null if "use a proxy server" flag is turned off, even if 
                    // the user specified a proxy address. When we read directly from the Registry we need to check
                    // for ProxyTypeFlags.PROXY_TYPE_PROXY. WinHttp does this for us and if the flag is not set,
                    // ieProxyConfig.Proxy will be null.
                    SetProxyAndBypassList(proxy, proxyByPass); 

                    SetAutoDetectSettings(ieProxyConfig.AutoDetect); 
 
                    // similar to comment above: ieProxyConfig.AutoConfigUrl will only be set if "automatically detect
                    // settings" flag is set. We don't need to check ProxyTypeFlags.PROXY_TYPE_AUTO_PROXY_URL; WinHttp 
                    // takes care of it and sets AutoConfigUrl to null if the flag is not set, regardless of the actual
                    // config script string.
                    SetAutoProxyUrl(autoConfigUrl);
                } 
                finally
                { 
                    FreeStr(ieProxyConfig.Proxy); 
                    FreeStr(ieProxyConfig.ProxyBypass);
                    FreeStr(ieProxyConfig.AutoConfigUrl); 
                }
            }
            else
            { 
                int errorCode = Marshal.GetLastWin32Error();
 
                if (errorCode == Microsoft.Win32.NativeMethods.ERROR_NOT_ENOUGH_MEMORY) 
                {
                    throw new OutOfMemoryException(); 
                }

                // if API call fails, rely on automatic detection
                SetAutoDetectSettings(true); 
            }
 
            GlobalLog.Leave("WinHttpWebProxyBuilder#" + ValidationHelper.HashString(this) + "::BuildInternal()"); 
        }
 
        private void FreeStr(IntPtr intPtr)
        {
            if (intPtr != IntPtr.Zero)
            { 
                Marshal.FreeHGlobal(intPtr);
            } 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
using System; 
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
 
namespace System.Net
{ 
    internal sealed class WinHttpWebProxyBuilder : WebProxyDataBuilder 
    {
        protected override void BuildInternal() 
        {
            GlobalLog.Enter("WinHttpWebProxyBuilder#" + ValidationHelper.HashString(this) + "::BuildInternal()");

            UnsafeNclNativeMethods.WinHttp.WINHTTP_CURRENT_USER_IE_PROXY_CONFIG ieProxyConfig = 
                new UnsafeNclNativeMethods.WinHttp.WINHTTP_CURRENT_USER_IE_PROXY_CONFIG();
 
            if (UnsafeNclNativeMethods.WinHttp.WinHttpGetIEProxyConfigForCurrentUser(ref ieProxyConfig)) 
            {
                string proxy = null; 
                string proxyByPass = null;
                string autoConfigUrl = null;
                try
                { 
                    proxy = Marshal.PtrToStringUni(ieProxyConfig.Proxy);
                    proxyByPass = Marshal.PtrToStringUni(ieProxyConfig.ProxyBypass); 
                    autoConfigUrl = Marshal.PtrToStringUni(ieProxyConfig.AutoConfigUrl); 

                    // note that ieProxyConfig.Proxy will be null if "use a proxy server" flag is turned off, even if 
                    // the user specified a proxy address. When we read directly from the Registry we need to check
                    // for ProxyTypeFlags.PROXY_TYPE_PROXY. WinHttp does this for us and if the flag is not set,
                    // ieProxyConfig.Proxy will be null.
                    SetProxyAndBypassList(proxy, proxyByPass); 

                    SetAutoDetectSettings(ieProxyConfig.AutoDetect); 
 
                    // similar to comment above: ieProxyConfig.AutoConfigUrl will only be set if "automatically detect
                    // settings" flag is set. We don't need to check ProxyTypeFlags.PROXY_TYPE_AUTO_PROXY_URL; WinHttp 
                    // takes care of it and sets AutoConfigUrl to null if the flag is not set, regardless of the actual
                    // config script string.
                    SetAutoProxyUrl(autoConfigUrl);
                } 
                finally
                { 
                    FreeStr(ieProxyConfig.Proxy); 
                    FreeStr(ieProxyConfig.ProxyBypass);
                    FreeStr(ieProxyConfig.AutoConfigUrl); 
                }
            }
            else
            { 
                int errorCode = Marshal.GetLastWin32Error();
 
                if (errorCode == Microsoft.Win32.NativeMethods.ERROR_NOT_ENOUGH_MEMORY) 
                {
                    throw new OutOfMemoryException(); 
                }

                // if API call fails, rely on automatic detection
                SetAutoDetectSettings(true); 
            }
 
            GlobalLog.Leave("WinHttpWebProxyBuilder#" + ValidationHelper.HashString(this) + "::BuildInternal()"); 
        }
 
        private void FreeStr(IntPtr intPtr)
        {
            if (intPtr != IntPtr.Zero)
            { 
                Marshal.FreeHGlobal(intPtr);
            } 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
_WinHttpWebProxyDataBuilder.cs source code in C# .NET

Source code for the .NET framework in C#

Code:

Link Menu
