IScriptMapInfo：：GetManagedType 方法

擷取要求處理常式的 Managed 型別。

語法

virtual PCWSTR GetManagedType(  
   DWORD* pcchManagedType = NULL  
) const = 0;  

參數

pcchManagedType
接收 Managed 型別長度之緩衝區的指標 DWORD ，以字元為單位。

傳回值

包含 Managed 型別之字串的指標。

備註

方法 GetManagedType 會 type 擷取位於 <handlers> ApplicationHost.config 檔案區段中的要求處理常式屬性。 此屬性包含要求處理常式的.NET Framework命名空間清單。 例如，根據預設，「TraceHandler-Integrated」 要求處理常式具有 type 「System.Web.Handlers.TraceHandler」 的屬性。

範例

下列程式碼範例示範如何使用 IHttpCoNtext：：GetScriptMap 方法來建立 HTTP 模組，以擷取 IScriptMapInfo 介面的指標。 然後，此範例會 GetManagedType 使用 方法來擷取處理目前要求之要求處理常式的 Managed 命名空間。 模組會將 Managed 類型傳回至 Web 用戶端，然後結束。

方法 IScriptMapInfo::GetManagedType 與 IHttpServer：：GetManagedType 方法不同，該方法 IScriptMapInfo::GetManagedType 只會 type 擷取 IScriptMapInfo 介面的屬性，而 IHttpServer::GetManagedType 可以擷取 type 任何虛擬路徑的屬性。

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

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

        // Retrieve the IScriptMapInfo interface.
        IScriptMapInfo * pScriptMapInfo = pHttpContext->GetScriptMap();

        // Create an HRESULT to receive return values from methods.
        HRESULT hr;

        // Test for an error.
        if (NULL != pScriptMapInfo)
        {
            // Create buffers to store the managed type.
            PCWSTR pwszManagedType;
            PSTR   pszManagedType;
            DWORD  cchManagedType = 0;

            // Retrieve the managed type.
            pwszManagedType = pScriptMapInfo->GetManagedType(&cchManagedType);

            // Test for an error.
            if (NULL != pwszManagedType)
            {
                // 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);

                // Test the length of the managed type.
                if (cchManagedType > 0)
                {
                    // Allocate space to store data.
                    pszManagedType =
                        (PSTR) pHttpContext->AllocateRequestMemory
                        (cchManagedType + 1);
                    // Test for an error.
                    if (NULL == pszManagedType)
                    {
                        // 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(pszManagedType,
                        pwszManagedType,cchManagedType);
                }

                // Return the managed type to the client.
                WriteResponseMessage(pHttpContext,"Managed type: ",
                    (cchManagedType>0) ? pszManagedType : "n/a");

                // 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,
        0,
        RQ_MAP_REQUEST_HANDLER
    );
}

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

另請參閱

IScriptMapInfo 介面
IHttpServer：：GetManagedType 方法