| title | description | ms.date | ms.assetid |
|---|---|---|---|
IHttpContext::GetResponseHeadersSent Method |
Describes the IHttpContext::GetResponseHeadersSent method and details its syntax, parameters, return value, remarks, code example, and requirements. |
10/07/2016 |
06006ede-2e42-a1c4-6627-3336ac22f636 |
Determines whether the HTTP response headers have been sent to the client.
virtual BOOL GetResponseHeadersSent(
VOID
) const = 0; This method takes no parameters.
true if the HTTP response headers have been sent; otherwise, false.
The GetResponseHeadersSent method determines whether another module has already sent the HTTP response headers to the client (for example, another HTTP module has called the IHttpResponse::Flush method). The GetResponseHeadersSent method is especially useful when you are creating an HTTP module that writes values to the headers, because it enables you to have deterministic control over the information that your HTTP module outputs to a Web client.
The following code example demonstrates how to use the GetResponseHeadersSent method to create an HTTP module that determines whether the headers have been written to the client. The module indicates the result by returning a message to a Web client.
[!code-cppIHttpContextGetResponseHeadersSent#1]
Your module must export the RegisterModule function. You can export this function by creating a module definition (.def) file for your project, or you can compile the module by using the /EXPORT:RegisterModule switch. For more information, see Walkthrough: Creating a Request-Level HTTP Module By Using Native Code.
You can compile the code by using the __stdcall (/Gz) calling convention instead of explicitly declaring the calling convention for each function.
| Type | Description |
|---|---|
| Client | - IIS 7.0 on [!INCLUDEwinvista] - IIS 7.5 on Windows 7 - IIS 8.0 on Windows 8 - IIS 10.0 on Windows 10 |
| Server | - IIS 7.0 on [!INCLUDEwinsrv2008] - IIS 7.5 on Windows Server 2008 R2 - IIS 8.0 on Windows Server 2012 - IIS 8.5 on Windows Server 2012 R2 - IIS 10.0 on Windows Server 2016 |
| Product | - IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0 - [!INCLUDEiisexp75], [!INCLUDEiisexp80], [!INCLUDEiisexp100] |
| Header | Httpserv.h |