IHttpContext::GetScriptName 方法
检索当前请求的 URL。
语法
virtual PCWSTR GetScriptName(
DWORD* pcchScriptName = NULL
) const = 0;
parameters
pcchScriptName
指向接收返回字符串长度的 DWORD 值的指针。
返回值
指向包含当前脚本名称的字符串的指针。
备注
方法 GetScriptName
用于检索指向包含当前请求 URL 的缓冲区的指针。
注意
服务器拥有此指针的生存期。
示例
下面的代码示例演示如何使用 GetScriptName
方法创建检索当前脚本名称的 HTTP 模块。 该模块会将该信息返回给 Web 客户端,然后退出。
#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 );
// Create pointers for the script information.
PCWSTR pwszScriptName;
char* pszScriptName;
// Create a DWORD for the buffer size.
DWORD cbScriptName = 0;
// Retrieve the script information.
pwszScriptName = pHttpContext->GetScriptName(&cbScriptName);
// Test for an error.
if ((pwszScriptName != NULL) && (cbScriptName > 0))
{
// Create a non-unicode buffer for the script information.
pszScriptName = (char*) pHttpContext->AllocateRequestMemory(
(DWORD) wcslen(pwszScriptName)+1 );
// Test for an error.
if (pszScriptName != NULL)
{
// Send the script information to the client.
wcstombs(pszScriptName,pwszScriptName,wcslen(pwszScriptName));
WriteResponseMessage(pHttpContext,
"Script Name: ",pszScriptName);
// 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
);
}
模块必须导出 RegisterModule 函数。 可以通过为项目创建模块定义 (.def) 文件导出此函数,也可以使用 开关编译模块 /EXPORT:RegisterModule
。 有关详细信息,请参阅 演练:使用本机代码创建Request-Level HTTP 模块。
可以选择使用调用约定编译代码, __stdcall (/Gz)
而不是为每个函数显式声明调用约定。
要求
类型 | 说明 |
---|---|
客户端 | - 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 |
服务器 | - 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 |
产品 | - 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 |
Header | Httpserv.h |
另请参阅
IHttpContext 接口
IHttpContext::GetScriptMap 方法
IHttpContext::GetScriptTranslated 方法