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WINHTTP_REQUEST_STATS structure (winhttp.h)

  • Article

The WINHTTP_REQUEST_STATS structure contains a variety of statistics for a request.

Syntax

typedef struct _WINHTTP_REQUEST_STATS {
  ULONGLONG ullFlags;
  ULONG     ulIndex;
  ULONG     cStats;
  ULONGLONG rgullStats[WinHttpRequestStatMax];
} WINHTTP_REQUEST_STATS, *PWINHTTP_REQUEST_STATS;

Members

ullFlags

Flags containing details on how the request was made. The following flags are available.

Value Meaning
WINHTTP_REQUEST_STAT_FLAG_TCP_FAST_OPEN TCP Fast Open occurred.
WINHTTP_REQUEST_STAT_FLAG_TLS_SESSION_RESUMPTION TLS Session Resumption occurred.
WINHTTP_REQUEST_STAT_FLAG_TLS_FALSE_START TLS False Start occurred.
WINHTTP_REQUEST_STAT_FLAG_PROXY_TLS_SESSION_RESUMPTION TLS Session Resumption occurred for the proxy connection.
WINHTTP_REQUEST_STAT_FLAG_PROXY_TLS_FALSE_START TLS False Start occurred for the proxy connection.
WINHTTP_REQUEST_STAT_FLAG_FIRST_REQUEST This is the first request on the connection.

ulIndex

The index of the request on the connection. This indicates how many prior requests were sent over the shared connection.

cStats

Unsigned long integer value that contains the number of statistics to retrieve. This should generally be set to WinHttpRequestStatLast.

rgullStats[WinHttpRequestStatMax]

Array of unsigned long long integer values that will contain the returned statistics, indexed by WINHTTP_REQUEST_STAT_ENTRY.

Remarks

This structure is used with WinHttpQueryOption to retrieve statistics for a request by specifying the WINHTTP_OPTION_REQUEST_STATS flag.

Requirements

Requirement Value
Minimum supported client Windows 10, version 1903 [desktop apps only]
Minimum supported server Windows Server 2019 [desktop apps only]
Header winhttp.h

See also

WinHttpQueryOption