IHttpCoNtext：：GetPhysicalPath 方法

擷取目前要求的實體路徑。

語法

virtual PCWSTR GetPhysicalPath(  
   DWORD* pcchPhysicalPath = NULL  
) = 0;  

參數

pcchPhysicalPath
的 DWORD 指標，其中包含 所 GetPhysicalPath 傳回之字串的長度。

傳回值

包含路徑之字串的指標。

備註

您可以使用 GetPhysicalPath 方法來擷取所要求目前檔案的實體路徑。 例如，如果已對網站首頁提出要求， GetPhysicalPath 此方法可能會傳回 SystemDrive\Inetpub\Wwwroot\Default.htm。

範例

下列程式碼範例示範如何使用 GetPhysicalPath 方法來建立 HTTP 模組，以擷取目前要求的完整路徑。

#define _WINSOCKAPI_
#include <windows.h>
#include <sal.h>
#include <httpserv.h>

// Create the module class.
class MyHttpModule : public CHttpModule
{
public:
    REQUEST_NOTIFICATION_STATUS
    OnSendResponse(
        IN IHttpContext * pHttpContext,
        IN ISendResponseProvider * pProvider
    )
    {
        UNREFERENCED_PARAMETER( pProvider );

        // Buffers for string variables.
        PCWSTR pwszPhysicalPath = NULL;
        char*  pszPhysicalPath = NULL;
        // Length of the string returned.
        DWORD  cchPhysicalPath = 0;

        // Retrieve the physical path.
        pwszPhysicalPath = pHttpContext->GetPhysicalPath(&cchPhysicalPath);

        // Test for an error.
        if (NULL != pwszPhysicalPath)
        {
            // Clear the existing buffer.
            pHttpContext->GetResponse()->Clear();
            // Check if the path string is empty.
            if (cchPhysicalPath > 0)
            {
                // Convert the physical path string.
                pszPhysicalPath = (char*) pHttpContext->AllocateRequestMemory( (DWORD) wcslen(pwszPhysicalPath)+1 );
                wcstombs(pszPhysicalPath,pwszPhysicalPath,wcslen(pwszPhysicalPath));
                // Output the path information.
                WriteResponseMessage(pHttpContext,
                    "Physical Path: ",pszPhysicalPath);
                // End additional processing.
                return RQ_NOTIFICATION_FINISH_REQUEST;
            }
        }

        // Return processing to the pipeline.
        return RQ_NOTIFICATION_CONTINUE;
    }

private:

    // Create a utility method that inserts a name/value pair into the response.
    HRESULT WriteResponseMessage(
        IHttpContext * pHttpContext,
        PCSTR pszName,
        PCSTR pszValue
    )
    {
        // Create an HRESULT to receive return values from methods.
        HRESULT hr;
        
        // Create a data chunk.
        HTTP_DATA_CHUNK dataChunk;
        // Set the chunk to a chunk in memory.
        dataChunk.DataChunkType = HttpDataChunkFromMemory;
        // Buffer for bytes written of data chunk.
        DWORD cbSent;

        // Set the chunk to the first buffer.
        dataChunk.FromMemory.pBuffer =
            (PVOID) pszName;
        // Set the chunk size to the first buffer size.
        dataChunk.FromMemory.BufferLength =
            (USHORT) strlen(pszName);
        // Insert the data chunk into the response.
        hr = pHttpContext->GetResponse()->WriteEntityChunks(
            &dataChunk,1,FALSE,TRUE,&cbSent);
        // Test for an error.
        if (FAILED(hr))
        {
            // Return the error status.
            return hr;
        }

        // Set the chunk to the second buffer.
        dataChunk.FromMemory.pBuffer =
            (PVOID) pszValue;
        // Set the chunk size to the second buffer size.
        dataChunk.FromMemory.BufferLength =
            (USHORT) strlen(pszValue);
        // Insert the data chunk into the response.
        hr = pHttpContext->GetResponse()->WriteEntityChunks(
            &dataChunk,1,FALSE,TRUE,&cbSent);
        // Test for an error.
        if (FAILED(hr))
        {
            // Return the error status.
            return hr;
        }

        // Return a success status.
        return S_OK;
    }
};

// Create the module's class factory.
class MyHttpModuleFactory : public IHttpModuleFactory
{
public:
    HRESULT
    GetHttpModule(
        OUT CHttpModule ** ppModule, 
        IN IModuleAllocator * pAllocator
    )
    {
        UNREFERENCED_PARAMETER( pAllocator );

        // Create a new instance.
        MyHttpModule * pModule = new MyHttpModule;

        // Test for an error.
        if (!pModule)
        {
            // Return an error if the factory cannot create the instance.
            return HRESULT_FROM_WIN32( ERROR_NOT_ENOUGH_MEMORY );
        }
        else
        {
            // Return a pointer to the module.
            *ppModule = pModule;
            pModule = NULL;
            // Return a success status.
            return S_OK;
        }            
    }

    void Terminate()
    {
        // Remove the class from memory.
        delete this;
    }
};

// Create the module's exported registration function.
HRESULT
__stdcall
RegisterModule(
    DWORD dwServerVersion,
    IHttpModuleRegistrationInfo * pModuleInfo,
    IHttpServer * pGlobalInfo
)
{
    UNREFERENCED_PARAMETER( dwServerVersion );
    UNREFERENCED_PARAMETER( pGlobalInfo );

    // Set the request notifications and exit.
    return pModuleInfo->SetRequestNotifications(
        new MyHttpModuleFactory,
        RQ_SEND_RESPONSE,
        0
    );
}

您的模組必須匯出 RegisterModule 函式 。 您可以為專案建立模組定義 (.def) 檔案，或使用 參數編譯模組 /EXPORT:RegisterModule 來匯出此函式。 如需詳細資訊，請參閱逐步解說 ：使用機器碼建立Request-Level HTTP 模組。

您可以選擇性地使用呼叫慣例編譯器代碼， __stdcall (/Gz) 而不是明確宣告每個函式的呼叫慣例。

規格需求

類型	描述
Client	- Windows Vista 上的 IIS 7.0 - Windows 7 上的 IIS 7.5 - Windows 8 上的 IIS 8.0 - Windows 10上的 IIS 10.0
伺服器	- Windows Server 2008 上的 IIS 7.0 - Windows Server 2008 R2 上的 IIS 7.5 - Windows Server 2012 上的 IIS 8.0 - Windows Server 2012 R2 上的 IIS 8.5 - Windows Server 2016上的 IIS 10.0
產品	- IIS 7.0、IIS 7.5、IIS 8.0、IIS 8.5、IIS 10.0 - IIS Express 7.5、IIS Express 8.0、IIS Express 10.0
標頭	Httpserv.h

另請參閱

IHttpCoNtext 介面