ホーム › Networking.HttpServer › HttpQueryRequestProperty

HttpQueryRequestProperty

関数

個々のHTTPリクエストのプロパティを取得する。

DLLHTTPAPI.dll呼出規約winapi

シグネチャ

// HTTPAPI.dll
#include <windows.h>

DWORD HttpQueryRequestProperty(
    HANDLE RequestQueueHandle,
    ULONGLONG Id,
    HTTP_REQUEST_PROPERTY PropertyId,
    const void* Qualifier,   // optional
    DWORD QualifierSize,
    void* Output,   // optional
    DWORD OutputBufferSize,
    DWORD* BytesReturned,   // optional
    OVERLAPPED* Overlapped   // optional
);

パラメーター

名前	型	方向	説明
RequestQueueHandle	HANDLE	in	対象要求キューのハンドル。
Id	ULONGLONG	in	プロパティを問い合わせる対象の要求ID。
PropertyId	HTTP_REQUEST_PROPERTY	in	取得する要求プロパティの種別(HTTP_REQUEST_PROPERTY)。
Qualifier	void*	inoptional	問い合わせを絞り込む修飾情報へのポインター。不要ならNULL。
QualifierSize	DWORD	in	Qualifierバッファーのバイト数。
Output	void*	outoptional	取得したプロパティ値を受け取る出力バッファー。
OutputBufferSize	DWORD	in	Output出力バッファーのバイト数。
BytesReturned	DWORD*	outoptional	実際に書き込まれたバイト数を受け取る変数へのポインター。
Overlapped	OVERLAPPED*	inoptional	非同期処理用のOVERLAPPED構造体へのポインター。同期ならNULL。

戻り値の型: DWORD

各言語での呼び出し定義

// HTTPAPI.dll
#include <windows.h>

DWORD HttpQueryRequestProperty(
    HANDLE RequestQueueHandle,
    ULONGLONG Id,
    HTTP_REQUEST_PROPERTY PropertyId,
    const void* Qualifier,   // optional
    DWORD QualifierSize,
    void* Output,   // optional
    DWORD OutputBufferSize,
    DWORD* BytesReturned,   // optional
    OVERLAPPED* Overlapped   // optional
);

[DllImport("HTTPAPI.dll", ExactSpelling = true)]
static extern uint HttpQueryRequestProperty(
    IntPtr RequestQueueHandle,   // HANDLE
    ulong Id,   // ULONGLONG
    int PropertyId,   // HTTP_REQUEST_PROPERTY
    IntPtr Qualifier,   // void* optional
    uint QualifierSize,   // DWORD
    IntPtr Output,   // void* optional, out
    uint OutputBufferSize,   // DWORD
    IntPtr BytesReturned,   // DWORD* optional, out
    IntPtr Overlapped   // OVERLAPPED* optional
);

<DllImport("HTTPAPI.dll", ExactSpelling:=True)>
Public Shared Function HttpQueryRequestProperty(
    RequestQueueHandle As IntPtr,   ' HANDLE
    Id As ULong,   ' ULONGLONG
    PropertyId As Integer,   ' HTTP_REQUEST_PROPERTY
    Qualifier As IntPtr,   ' void* optional
    QualifierSize As UInteger,   ' DWORD
    Output As IntPtr,   ' void* optional, out
    OutputBufferSize As UInteger,   ' DWORD
    BytesReturned As IntPtr,   ' DWORD* optional, out
    Overlapped As IntPtr   ' OVERLAPPED* optional
) As UInteger
End Function

' RequestQueueHandle : HANDLE
' Id : ULONGLONG
' PropertyId : HTTP_REQUEST_PROPERTY
' Qualifier : void* optional
' QualifierSize : DWORD
' Output : void* optional, out
' OutputBufferSize : DWORD
' BytesReturned : DWORD* optional, out
' Overlapped : OVERLAPPED* optional
Declare PtrSafe Function HttpQueryRequestProperty Lib "httpapi" ( _
    ByVal RequestQueueHandle As LongPtr, _
    ByVal Id As LongLong, _
    ByVal PropertyId As Long, _
    ByVal Qualifier As LongPtr, _
    ByVal QualifierSize As Long, _
    ByVal Output As LongPtr, _
    ByVal OutputBufferSize As Long, _
    ByVal BytesReturned As LongPtr, _
    ByVal Overlapped As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

HttpQueryRequestProperty = ctypes.windll.httpapi.HttpQueryRequestProperty
HttpQueryRequestProperty.restype = wintypes.DWORD
HttpQueryRequestProperty.argtypes = [
    wintypes.HANDLE,  # RequestQueueHandle : HANDLE
    ctypes.c_ulonglong,  # Id : ULONGLONG
    ctypes.c_int,  # PropertyId : HTTP_REQUEST_PROPERTY
    ctypes.POINTER(None),  # Qualifier : void* optional
    wintypes.DWORD,  # QualifierSize : DWORD
    ctypes.POINTER(None),  # Output : void* optional, out
    wintypes.DWORD,  # OutputBufferSize : DWORD
    ctypes.POINTER(wintypes.DWORD),  # BytesReturned : DWORD* optional, out
    ctypes.c_void_p,  # Overlapped : OVERLAPPED* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('HTTPAPI.dll')
HttpQueryRequestProperty = Fiddle::Function.new(
  lib['HttpQueryRequestProperty'],
  [
    Fiddle::TYPE_VOIDP,  # RequestQueueHandle : HANDLE
    -Fiddle::TYPE_LONG_LONG,  # Id : ULONGLONG
    Fiddle::TYPE_INT,  # PropertyId : HTTP_REQUEST_PROPERTY
    Fiddle::TYPE_VOIDP,  # Qualifier : void* optional
    -Fiddle::TYPE_INT,  # QualifierSize : DWORD
    Fiddle::TYPE_VOIDP,  # Output : void* optional, out
    -Fiddle::TYPE_INT,  # OutputBufferSize : DWORD
    Fiddle::TYPE_VOIDP,  # BytesReturned : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # Overlapped : OVERLAPPED* optional
  ],
  -Fiddle::TYPE_INT)

#[link(name = "httpapi")]
extern "system" {
    fn HttpQueryRequestProperty(
        RequestQueueHandle: *mut core::ffi::c_void,  // HANDLE
        Id: u64,  // ULONGLONG
        PropertyId: i32,  // HTTP_REQUEST_PROPERTY
        Qualifier: *const (),  // void* optional
        QualifierSize: u32,  // DWORD
        Output: *mut (),  // void* optional, out
        OutputBufferSize: u32,  // DWORD
        BytesReturned: *mut u32,  // DWORD* optional, out
        Overlapped: *mut OVERLAPPED  // OVERLAPPED* optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("HTTPAPI.dll")]
public static extern uint HttpQueryRequestProperty(IntPtr RequestQueueHandle, ulong Id, int PropertyId, IntPtr Qualifier, uint QualifierSize, IntPtr Output, uint OutputBufferSize, IntPtr BytesReturned, IntPtr Overlapped);
"@
$api = Add-Type -MemberDefinition $sig -Name 'HTTPAPI_HttpQueryRequestProperty' -Namespace Win32 -PassThru
# $api::HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped)

#uselib "HTTPAPI.dll"
#func global HttpQueryRequestProperty "HttpQueryRequestProperty" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; HttpQueryRequestProperty RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, varptr(BytesReturned), varptr(Overlapped)   ; 戻り値は stat
; RequestQueueHandle : HANDLE -> "sptr"
; Id : ULONGLONG -> "sptr"
; PropertyId : HTTP_REQUEST_PROPERTY -> "sptr"
; Qualifier : void* optional -> "sptr"
; QualifierSize : DWORD -> "sptr"
; Output : void* optional, out -> "sptr"
; OutputBufferSize : DWORD -> "sptr"
; BytesReturned : DWORD* optional, out -> "sptr"
; Overlapped : OVERLAPPED* optional -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

出力引数:

#uselib "HTTPAPI.dll"
#cfunc global HttpQueryRequestProperty "HttpQueryRequestProperty" sptr, int64, int, sptr, int, sptr, int, var, var
; res = HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped)
; RequestQueueHandle : HANDLE -> "sptr"
; Id : ULONGLONG -> "int64"
; PropertyId : HTTP_REQUEST_PROPERTY -> "int"
; Qualifier : void* optional -> "sptr"
; QualifierSize : DWORD -> "int"
; Output : void* optional, out -> "sptr"
; OutputBufferSize : DWORD -> "int"
; BytesReturned : DWORD* optional, out -> "var"
; Overlapped : OVERLAPPED* optional -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。#uselib "HTTPAPI.dll"
#cfunc global HttpQueryRequestProperty "HttpQueryRequestProperty" sptr, int64, int, sptr, int, sptr, int, sptr, sptr
; res = HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, varptr(BytesReturned), varptr(Overlapped))
; RequestQueueHandle : HANDLE -> "sptr"
; Id : ULONGLONG -> "int64"
; PropertyId : HTTP_REQUEST_PROPERTY -> "int"
; Qualifier : void* optional -> "sptr"
; QualifierSize : DWORD -> "int"
; Output : void* optional, out -> "sptr"
; OutputBufferSize : DWORD -> "int"
; BytesReturned : DWORD* optional, out -> "sptr"
; Overlapped : OVERLAPPED* optional -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

出力引数:

; DWORD HttpQueryRequestProperty(HANDLE RequestQueueHandle, ULONGLONG Id, HTTP_REQUEST_PROPERTY PropertyId, void* Qualifier, DWORD QualifierSize, void* Output, DWORD OutputBufferSize, DWORD* BytesReturned, OVERLAPPED* Overlapped)
#uselib "HTTPAPI.dll"
#cfunc global HttpQueryRequestProperty "HttpQueryRequestProperty" intptr, int64, int, intptr, int, intptr, int, var, var
; res = HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped)
; RequestQueueHandle : HANDLE -> "intptr"
; Id : ULONGLONG -> "int64"
; PropertyId : HTTP_REQUEST_PROPERTY -> "int"
; Qualifier : void* optional -> "intptr"
; QualifierSize : DWORD -> "int"
; Output : void* optional, out -> "intptr"
; OutputBufferSize : DWORD -> "int"
; BytesReturned : DWORD* optional, out -> "var"
; Overlapped : OVERLAPPED* optional -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; DWORD HttpQueryRequestProperty(HANDLE RequestQueueHandle, ULONGLONG Id, HTTP_REQUEST_PROPERTY PropertyId, void* Qualifier, DWORD QualifierSize, void* Output, DWORD OutputBufferSize, DWORD* BytesReturned, OVERLAPPED* Overlapped)
#uselib "HTTPAPI.dll"
#cfunc global HttpQueryRequestProperty "HttpQueryRequestProperty" intptr, int64, int, intptr, int, intptr, int, intptr, intptr
; res = HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, varptr(BytesReturned), varptr(Overlapped))
; RequestQueueHandle : HANDLE -> "intptr"
; Id : ULONGLONG -> "int64"
; PropertyId : HTTP_REQUEST_PROPERTY -> "int"
; Qualifier : void* optional -> "intptr"
; QualifierSize : DWORD -> "int"
; Output : void* optional, out -> "intptr"
; OutputBufferSize : DWORD -> "int"
; BytesReturned : DWORD* optional, out -> "intptr"
; Overlapped : OVERLAPPED* optional -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	httpapi = windows.NewLazySystemDLL("HTTPAPI.dll")
	procHttpQueryRequestProperty = httpapi.NewProc("HttpQueryRequestProperty")
)

// RequestQueueHandle (HANDLE), Id (ULONGLONG), PropertyId (HTTP_REQUEST_PROPERTY), Qualifier (void* optional), QualifierSize (DWORD), Output (void* optional, out), OutputBufferSize (DWORD), BytesReturned (DWORD* optional, out), Overlapped (OVERLAPPED* optional)
r1, _, err := procHttpQueryRequestProperty.Call(
	uintptr(RequestQueueHandle),
	uintptr(Id),
	uintptr(PropertyId),
	uintptr(Qualifier),
	uintptr(QualifierSize),
	uintptr(Output),
	uintptr(OutputBufferSize),
	uintptr(BytesReturned),
	uintptr(Overlapped),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function HttpQueryRequestProperty(
  RequestQueueHandle: THandle;   // HANDLE
  Id: UInt64;   // ULONGLONG
  PropertyId: Integer;   // HTTP_REQUEST_PROPERTY
  Qualifier: Pointer;   // void* optional
  QualifierSize: DWORD;   // DWORD
  Output: Pointer;   // void* optional, out
  OutputBufferSize: DWORD;   // DWORD
  BytesReturned: Pointer;   // DWORD* optional, out
  Overlapped: Pointer   // OVERLAPPED* optional
): DWORD; stdcall;
  external 'HTTPAPI.dll' name 'HttpQueryRequestProperty';

result := DllCall("HTTPAPI\HttpQueryRequestProperty"
    , "Ptr", RequestQueueHandle   ; HANDLE
    , "Int64", Id   ; ULONGLONG
    , "Int", PropertyId   ; HTTP_REQUEST_PROPERTY
    , "Ptr", Qualifier   ; void* optional
    , "UInt", QualifierSize   ; DWORD
    , "Ptr", Output   ; void* optional, out
    , "UInt", OutputBufferSize   ; DWORD
    , "Ptr", BytesReturned   ; DWORD* optional, out
    , "Ptr", Overlapped   ; OVERLAPPED* optional
    , "UInt")   ; return: DWORD

●HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped) = DLL("HTTPAPI.dll", "dword HttpQueryRequestProperty(void*, qword, int, void*, dword, void*, dword, void*, void*)")
# 呼び出し: HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped)
# RequestQueueHandle : HANDLE -> "void*"
# Id : ULONGLONG -> "qword"
# PropertyId : HTTP_REQUEST_PROPERTY -> "int"
# Qualifier : void* optional -> "void*"
# QualifierSize : DWORD -> "dword"
# Output : void* optional, out -> "void*"
# OutputBufferSize : DWORD -> "dword"
# BytesReturned : DWORD* optional, out -> "void*"
# Overlapped : OVERLAPPED* optional -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。

const std = @import("std");

extern "httpapi" fn HttpQueryRequestProperty(
    RequestQueueHandle: ?*anyopaque, // HANDLE
    Id: u64, // ULONGLONG
    PropertyId: i32, // HTTP_REQUEST_PROPERTY
    Qualifier: ?*anyopaque, // void* optional
    QualifierSize: u32, // DWORD
    Output: ?*anyopaque, // void* optional, out
    OutputBufferSize: u32, // DWORD
    BytesReturned: [*c]u32, // DWORD* optional, out
    Overlapped: [*c]OVERLAPPED // OVERLAPPED* optional
) callconv(std.os.windows.WINAPI) u32;

proc HttpQueryRequestProperty(
    RequestQueueHandle: pointer,  # HANDLE
    Id: uint64,  # ULONGLONG
    PropertyId: int32,  # HTTP_REQUEST_PROPERTY
    Qualifier: pointer,  # void* optional
    QualifierSize: uint32,  # DWORD
    Output: pointer,  # void* optional, out
    OutputBufferSize: uint32,  # DWORD
    BytesReturned: ptr uint32,  # DWORD* optional, out
    Overlapped: ptr OVERLAPPED  # OVERLAPPED* optional
): uint32 {.importc: "HttpQueryRequestProperty", stdcall, dynlib: "HTTPAPI.dll".}

pragma(lib, "httpapi");
extern(Windows)
uint HttpQueryRequestProperty(
    void* RequestQueueHandle,   // HANDLE
    ulong Id,   // ULONGLONG
    int PropertyId,   // HTTP_REQUEST_PROPERTY
    void* Qualifier,   // void* optional
    uint QualifierSize,   // DWORD
    void* Output,   // void* optional, out
    uint OutputBufferSize,   // DWORD
    uint* BytesReturned,   // DWORD* optional, out
    OVERLAPPED* Overlapped   // OVERLAPPED* optional
);

ccall((:HttpQueryRequestProperty, "HTTPAPI.dll"), stdcall, UInt32,
      (Ptr{Cvoid}, UInt64, Int32, Ptr{Cvoid}, UInt32, Ptr{Cvoid}, UInt32, Ptr{UInt32}, Ptr{OVERLAPPED}),
      RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped)
# RequestQueueHandle : HANDLE -> Ptr{Cvoid}
# Id : ULONGLONG -> UInt64
# PropertyId : HTTP_REQUEST_PROPERTY -> Int32
# Qualifier : void* optional -> Ptr{Cvoid}
# QualifierSize : DWORD -> UInt32
# Output : void* optional, out -> Ptr{Cvoid}
# OutputBufferSize : DWORD -> UInt32
# BytesReturned : DWORD* optional, out -> Ptr{UInt32}
# Overlapped : OVERLAPPED* optional -> Ptr{OVERLAPPED}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t HttpQueryRequestProperty(
    void* RequestQueueHandle,
    uint64_t Id,
    int32_t PropertyId,
    void* Qualifier,
    uint32_t QualifierSize,
    void* Output,
    uint32_t OutputBufferSize,
    uint32_t* BytesReturned,
    void* Overlapped);
]]
local httpapi = ffi.load("httpapi")
-- httpapi.HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped)
-- RequestQueueHandle : HANDLE
-- Id : ULONGLONG
-- PropertyId : HTTP_REQUEST_PROPERTY
-- Qualifier : void* optional
-- QualifierSize : DWORD
-- Output : void* optional, out
-- OutputBufferSize : DWORD
-- BytesReturned : DWORD* optional, out
-- Overlapped : OVERLAPPED* optional
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('HTTPAPI.dll');
const HttpQueryRequestProperty = lib.func('__stdcall', 'HttpQueryRequestProperty', 'uint32_t', ['void *', 'uint64_t', 'int32_t', 'void *', 'uint32_t', 'void *', 'uint32_t', 'uint32_t *', 'void *']);
// HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped)
// RequestQueueHandle : HANDLE -> 'void *'
// Id : ULONGLONG -> 'uint64_t'
// PropertyId : HTTP_REQUEST_PROPERTY -> 'int32_t'
// Qualifier : void* optional -> 'void *'
// QualifierSize : DWORD -> 'uint32_t'
// Output : void* optional, out -> 'void *'
// OutputBufferSize : DWORD -> 'uint32_t'
// BytesReturned : DWORD* optional, out -> 'uint32_t *'
// Overlapped : OVERLAPPED* optional -> 'void *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("HTTPAPI.dll", {
  HttpQueryRequestProperty: { parameters: ["pointer", "u64", "i32", "pointer", "u32", "pointer", "u32", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped)
// RequestQueueHandle : HANDLE -> "pointer"
// Id : ULONGLONG -> "u64"
// PropertyId : HTTP_REQUEST_PROPERTY -> "i32"
// Qualifier : void* optional -> "pointer"
// QualifierSize : DWORD -> "u32"
// Output : void* optional, out -> "pointer"
// OutputBufferSize : DWORD -> "u32"
// BytesReturned : DWORD* optional, out -> "pointer"
// Overlapped : OVERLAPPED* optional -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t HttpQueryRequestProperty(
    void* RequestQueueHandle,
    uint64_t Id,
    int32_t PropertyId,
    void* Qualifier,
    uint32_t QualifierSize,
    void* Output,
    uint32_t OutputBufferSize,
    uint32_t* BytesReturned,
    void* Overlapped);
C, "HTTPAPI.dll");
// $ffi->HttpQueryRequestProperty(RequestQueueHandle, Id, PropertyId, Qualifier, QualifierSize, Output, OutputBufferSize, BytesReturned, Overlapped);
// RequestQueueHandle : HANDLE
// Id : ULONGLONG
// PropertyId : HTTP_REQUEST_PROPERTY
// Qualifier : void* optional
// QualifierSize : DWORD
// Output : void* optional, out
// OutputBufferSize : DWORD
// BytesReturned : DWORD* optional, out
// Overlapped : OVERLAPPED* optional
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Httpapi extends StdCallLibrary {
    Httpapi INSTANCE = Native.load("httpapi", Httpapi.class);
    int HttpQueryRequestProperty(
        Pointer RequestQueueHandle,   // HANDLE
        long Id,   // ULONGLONG
        int PropertyId,   // HTTP_REQUEST_PROPERTY
        Pointer Qualifier,   // void* optional
        int QualifierSize,   // DWORD
        Pointer Output,   // void* optional, out
        int OutputBufferSize,   // DWORD
        IntByReference BytesReturned,   // DWORD* optional, out
        Pointer Overlapped   // OVERLAPPED* optional
    );
}

@[Link("httpapi")]
lib LibHTTPAPI
  fun HttpQueryRequestProperty = HttpQueryRequestProperty(
    RequestQueueHandle : Void*,   # HANDLE
    Id : UInt64,   # ULONGLONG
    PropertyId : Int32,   # HTTP_REQUEST_PROPERTY
    Qualifier : Void*,   # void* optional
    QualifierSize : UInt32,   # DWORD
    Output : Void*,   # void* optional, out
    OutputBufferSize : UInt32,   # DWORD
    BytesReturned : UInt32*,   # DWORD* optional, out
    Overlapped : OVERLAPPED*   # OVERLAPPED* optional
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef HttpQueryRequestPropertyNative = Uint32 Function(Pointer<Void>, Uint64, Int32, Pointer<Void>, Uint32, Pointer<Void>, Uint32, Pointer<Uint32>, Pointer<Void>);
typedef HttpQueryRequestPropertyDart = int Function(Pointer<Void>, int, int, Pointer<Void>, int, Pointer<Void>, int, Pointer<Uint32>, Pointer<Void>);
final HttpQueryRequestProperty = DynamicLibrary.open('HTTPAPI.dll')
    .lookupFunction<HttpQueryRequestPropertyNative, HttpQueryRequestPropertyDart>('HttpQueryRequestProperty');
// RequestQueueHandle : HANDLE -> Pointer<Void>
// Id : ULONGLONG -> Uint64
// PropertyId : HTTP_REQUEST_PROPERTY -> Int32
// Qualifier : void* optional -> Pointer<Void>
// QualifierSize : DWORD -> Uint32
// Output : void* optional, out -> Pointer<Void>
// OutputBufferSize : DWORD -> Uint32
// BytesReturned : DWORD* optional, out -> Pointer<Uint32>
// Overlapped : OVERLAPPED* optional -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function HttpQueryRequestProperty(
  RequestQueueHandle: THandle;   // HANDLE
  Id: UInt64;   // ULONGLONG
  PropertyId: Integer;   // HTTP_REQUEST_PROPERTY
  Qualifier: Pointer;   // void* optional
  QualifierSize: DWORD;   // DWORD
  Output: Pointer;   // void* optional, out
  OutputBufferSize: DWORD;   // DWORD
  BytesReturned: Pointer;   // DWORD* optional, out
  Overlapped: Pointer   // OVERLAPPED* optional
): DWORD; stdcall;
  external 'HTTPAPI.dll' name 'HttpQueryRequestProperty';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "HttpQueryRequestProperty"
  c_HttpQueryRequestProperty :: Ptr () -> Word64 -> Int32 -> Ptr () -> Word32 -> Ptr () -> Word32 -> Ptr Word32 -> Ptr () -> IO Word32
-- RequestQueueHandle : HANDLE -> Ptr ()
-- Id : ULONGLONG -> Word64
-- PropertyId : HTTP_REQUEST_PROPERTY -> Int32
-- Qualifier : void* optional -> Ptr ()
-- QualifierSize : DWORD -> Word32
-- Output : void* optional, out -> Ptr ()
-- OutputBufferSize : DWORD -> Word32
-- BytesReturned : DWORD* optional, out -> Ptr Word32
-- Overlapped : OVERLAPPED* optional -> Ptr ()
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let httpqueryrequestproperty =
  foreign "HttpQueryRequestProperty"
    ((ptr void) @-> uint64_t @-> int32_t @-> (ptr void) @-> uint32_t @-> (ptr void) @-> uint32_t @-> (ptr uint32_t) @-> (ptr void) @-> returning uint32_t)
(* RequestQueueHandle : HANDLE -> (ptr void) *)
(* Id : ULONGLONG -> uint64_t *)
(* PropertyId : HTTP_REQUEST_PROPERTY -> int32_t *)
(* Qualifier : void* optional -> (ptr void) *)
(* QualifierSize : DWORD -> uint32_t *)
(* Output : void* optional, out -> (ptr void) *)
(* OutputBufferSize : DWORD -> uint32_t *)
(* BytesReturned : DWORD* optional, out -> (ptr uint32_t) *)
(* Overlapped : OVERLAPPED* optional -> (ptr void) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library httpapi (t "HTTPAPI.dll"))
(cffi:use-foreign-library httpapi)

(cffi:defcfun ("HttpQueryRequestProperty" http-query-request-property :convention :stdcall) :uint32
  (request-queue-handle :pointer)   ; HANDLE
  (id :uint64)   ; ULONGLONG
  (property-id :int32)   ; HTTP_REQUEST_PROPERTY
  (qualifier :pointer)   ; void* optional
  (qualifier-size :uint32)   ; DWORD
  (output :pointer)   ; void* optional, out
  (output-buffer-size :uint32)   ; DWORD
  (bytes-returned :pointer)   ; DWORD* optional, out
  (overlapped :pointer))   ; OVERLAPPED* optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $HttpQueryRequestProperty = Win32::API::More->new('HTTPAPI',
    'DWORD HttpQueryRequestProperty(HANDLE RequestQueueHandle, UINT64 Id, int PropertyId, LPVOID Qualifier, DWORD QualifierSize, LPVOID Output, DWORD OutputBufferSize, LPVOID BytesReturned, LPVOID Overlapped)');
# my $ret = $HttpQueryRequestProperty->Call($RequestQueueHandle, $Id, $PropertyId, $Qualifier, $QualifierSize, $Output, $OutputBufferSize, $BytesReturned, $Overlapped);
# RequestQueueHandle : HANDLE -> HANDLE
# Id : ULONGLONG -> UINT64
# PropertyId : HTTP_REQUEST_PROPERTY -> int
# Qualifier : void* optional -> LPVOID
# QualifierSize : DWORD -> DWORD
# Output : void* optional, out -> LPVOID
# OutputBufferSize : DWORD -> DWORD
# BytesReturned : DWORD* optional, out -> LPVOID
# Overlapped : OVERLAPPED* optional -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

HttpQueryRequestProperty

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