Metode IMapPathProvider::GetPhysicalPath

Mengambil jalur fisik untuk permintaan saat ini.

Sintaksis

virtual PCWSTR GetPhysicalPath(  
) const = 0;

Parameter-parameternya

Metode ini tidak mengambil parameter.

Mengembalikan Nilai

Penunjuk ke string yang berisi jalur fisik.

Komentar

Metode mengambil GetPhysicalPath jalur untuk permintaan saat ini ketika modul HTTP memproses peristiwa CHttpModule::OnMapPath .

Nota

Jalur yang dikembalikan oleh GetPhysicalPath metode tidak diterjemahkan ke jalur fisik yang memberikan respons aktual. Misalnya, jika halaman beranda default untuk situs Web Default.asp, permintaan untuk http://example.com/ akan mengembalikan C:\Inetpub\Wwwroot, dan bukan C:\Inetpub\Wwwroot\Default.asp.

Contoh

Contoh kode berikut menunjukkan cara menggunakan GetPhysicalPath metode untuk membuat modul HTTP yang mengambil jalur fisik untuk permintaan saat ini dan mengembalikan jalur ke klien Web.

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

// Create the module class.
class MyHttpModule : public CHttpModule
{
public:
    REQUEST_NOTIFICATION_STATUS
    OnMapPath(
        IN IHttpContext * pHttpContext,
        IN IMapPathProvider * pProvider
    )
    {
        // Create an HRESULT to receive return values from methods.
        HRESULT hr;

        // Set the initial return status flag to false.
        fReturnInformation = false;

        // Buffer to store the translated path.
        char* pszPhysicalPath;

        // Retrieve a pointer to the physical path.
        PCWSTR pwszPhysicalPath = pProvider->GetPhysicalPath();

        // Test for an error.
        if (NULL != pwszPhysicalPath)
        {
            // Length of the returned path.
            DWORD cbPhysicalPath = (DWORD) wcslen(pwszPhysicalPath);
            // Allocate space to store the path.
            pszPhysicalPath  =
                (PSTR) pHttpContext->AllocateRequestMemory(cbPhysicalPath + 1);
            // Test for an error.
            if (pszPhysicalPath==NULL)
            {
                // Set the error status.
                hr = HRESULT_FROM_WIN32(ERROR_NOT_ENOUGH_MEMORY);
                pProvider->SetErrorStatus( hr );
                // End additional processing.
                return RQ_NOTIFICATION_FINISH_REQUEST;
            }

            // Convert the WCHAR string to a CHAR string.
            wcstombs(pszPhysicalPath,pwszPhysicalPath,cbPhysicalPath);
            
            // Clear the existing response.
            pHttpContext->GetResponse()->Clear();
            // Set the MIME type to plain text.
            pHttpContext->GetResponse()->SetHeader(
                HttpHeaderContentType,"text/plain",
                (USHORT)strlen("text/plain"),TRUE);
            
            // Return the path information.
            WriteResponseMessage(pHttpContext,
                "Physical path: ",pszPhysicalPath);

            // Set the flag that the module will return information.
            fReturnInformation = true;

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

    REQUEST_NOTIFICATION_STATUS
    OnPreExecuteRequestHandler(
        IN IHttpContext *                       pHttpContext,
        IN IHttpEventProvider *             pProvider
    )
    {
        UNREFERENCED_PARAMETER( pHttpContext );
        UNREFERENCED_PARAMETER( pProvider );

        // Check the return status.
        if (fReturnInformation == true)
        {
            // End additional processing.
            return RQ_NOTIFICATION_FINISH_REQUEST;
        }
        // Return processing to the pipeline.
        return RQ_NOTIFICATION_CONTINUE;
    }

private:

    // Create boolean variable to track the return status.
    bool fReturnInformation;

    // 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_MAP_PATH | RQ_PRE_EXECUTE_REQUEST_HANDLER,
        0
    );
}

Modul Anda harus mengekspor fungsi RegisterModule . Anda dapat mengekspor fungsi ini dengan membuat file definisi modul (.def) untuk proyek Anda, atau Anda dapat mengkompilasi modul dengan menggunakan sakelar /EXPORT:RegisterModule . Untuk informasi selengkapnya, lihat Panduan: Membuat Modul HTTP Request-Level Dengan Menggunakan Kode Asli.

Anda dapat secara opsional mengkompilasi kode dengan menggunakan __stdcall (/Gz) konvensi panggilan alih-alih secara eksplisit mendeklarasikan konvensi panggilan untuk setiap fungsi.

Persyaratan

Tipe	Deskripsi
Klien	- IIS 7.0 di Windows Vista - IIS 7.5 di Windows 7 - IIS 8.0 di Windows 8 - IIS 10.0 di Windows 10
pelayan	- IIS 7.0 di Windows Server 2008 - IIS 7.5 di Windows Server 2008 R2 - IIS 8.0 di Windows Server 2012 - IIS 8.5 di Windows Server 2012 R2 - IIS 10.0 di Windows Server 2016
Produk	- 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
Kepala Halaman	Httpserv.h

Lihat Juga

Antarmuka IMapPathProvider

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Last updated on 2025-06-18