IXMLHTTPRequest2Callback::OnHeadersAvailable method (msxml6.h)
Occurs after an HTTP request has been sent to the server and the server has responded with response headers.
Syntax
HRESULT OnHeadersAvailable(
[in, optional] IXMLHTTPRequest2 *pXHR,
[in] DWORD dwStatus,
[in] const WCHAR *pwszStatus
);
Parameters
[in, optional] pXHR
The initial HTTP request object that returns the headers.
[in] dwStatus
The status code for the request.
Note Possible values for this parameter also include the HTTP_STATUS_* values defined by winhttp.h for desktop apps.
[in] pwszStatus
The status code for the request appearing in human-readable form as a null-terminated string.
Return value
Returns S_OK on success.
Note This callback function must not throw exceptions.
Remarks
To view an individual response header, call the GetResponseHeader method on the IXMLHTTPRequest2 interface. To view all response headers, call the GetAllResponseHeaders method. To cancel the request, call the Abort method On the pXHR object.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 8 [desktop apps | UWP apps],MSXML 6.0 and later |
| Minimum supported server | Windows Server 2012 [desktop apps | UWP apps] |
| Target Platform | Windows |
| Header | msxml6.h |