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HttpWebSocketReceive

関数
WebSocket接続でデータを受信する。
DLLWININET.dll呼出規約winapi

シグネチャ

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

BOOL HttpWebSocketReceive(
    void* hWebSocket,
    void* pvBuffer,
    DWORD dwBufferLength,
    DWORD* pdwBytesRead,
    HTTP_WEB_SOCKET_BUFFER_TYPE* pBufferType
);

パラメーター

名前方向説明
hWebSocketvoid*in受信に使うWebSocketハンドル。
pvBuffervoid*out受信データを格納するバッファへのポインタ。
dwBufferLengthDWORDinpvBufferのサイズ(バイト)、すなわち最大受信量。
pdwBytesReadDWORD*inout実際に受信したバイト数を受け取るDWORDへのポインタ。
pBufferTypeHTTP_WEB_SOCKET_BUFFER_TYPE*out受信データの種別を受け取るHTTP_WEB_SOCKET_BUFFER_TYPE列挙へのポインタ。

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL HttpWebSocketReceive(
    void* hWebSocket,
    void* pvBuffer,
    DWORD dwBufferLength,
    DWORD* pdwBytesRead,
    HTTP_WEB_SOCKET_BUFFER_TYPE* pBufferType
);
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll", ExactSpelling = true)]
static extern bool HttpWebSocketReceive(
    IntPtr hWebSocket,   // void*
    IntPtr pvBuffer,   // void* out
    uint dwBufferLength,   // DWORD
    ref uint pdwBytesRead,   // DWORD* in/out
    out int pBufferType   // HTTP_WEB_SOCKET_BUFFER_TYPE* out
);
<DllImport("WININET.dll", ExactSpelling:=True)>
Public Shared Function HttpWebSocketReceive(
    hWebSocket As IntPtr,   ' void*
    pvBuffer As IntPtr,   ' void* out
    dwBufferLength As UInteger,   ' DWORD
    ByRef pdwBytesRead As UInteger,   ' DWORD* in/out
    <Out> ByRef pBufferType As Integer   ' HTTP_WEB_SOCKET_BUFFER_TYPE* out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
' hWebSocket : void*
' pvBuffer : void* out
' dwBufferLength : DWORD
' pdwBytesRead : DWORD* in/out
' pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out
Declare PtrSafe Function HttpWebSocketReceive Lib "wininet" ( _
    ByVal hWebSocket As LongPtr, _
    ByVal pvBuffer As LongPtr, _
    ByVal dwBufferLength As Long, _
    ByRef pdwBytesRead As Long, _
    ByRef pBufferType As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。
import ctypes
from ctypes import wintypes

HttpWebSocketReceive = ctypes.windll.wininet.HttpWebSocketReceive
HttpWebSocketReceive.restype = wintypes.BOOL
HttpWebSocketReceive.argtypes = [
    ctypes.POINTER(None),  # hWebSocket : void*
    ctypes.POINTER(None),  # pvBuffer : void* out
    wintypes.DWORD,  # dwBufferLength : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pdwBytesRead : DWORD* in/out
    ctypes.c_void_p,  # pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
HttpWebSocketReceive = Fiddle::Function.new(
  lib['HttpWebSocketReceive'],
  [
    Fiddle::TYPE_VOIDP,  # hWebSocket : void*
    Fiddle::TYPE_VOIDP,  # pvBuffer : void* out
    -Fiddle::TYPE_INT,  # dwBufferLength : DWORD
    Fiddle::TYPE_VOIDP,  # pdwBytesRead : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out
  ],
  Fiddle::TYPE_INT)
#[link(name = "wininet")]
extern "system" {
    fn HttpWebSocketReceive(
        hWebSocket: *mut (),  // void*
        pvBuffer: *mut (),  // void* out
        dwBufferLength: u32,  // DWORD
        pdwBytesRead: *mut u32,  // DWORD* in/out
        pBufferType: *mut i32  // HTTP_WEB_SOCKET_BUFFER_TYPE* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll")]
public static extern bool HttpWebSocketReceive(IntPtr hWebSocket, IntPtr pvBuffer, uint dwBufferLength, ref uint pdwBytesRead, out int pBufferType);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_HttpWebSocketReceive' -Namespace Win32 -PassThru
# $api::HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType)
#uselib "WININET.dll"
#func global HttpWebSocketReceive "HttpWebSocketReceive" sptr, sptr, sptr, sptr, sptr
; HttpWebSocketReceive hWebSocket, pvBuffer, dwBufferLength, varptr(pdwBytesRead), varptr(pBufferType)   ; 戻り値は stat
; hWebSocket : void* -> "sptr"
; pvBuffer : void* out -> "sptr"
; dwBufferLength : DWORD -> "sptr"
; pdwBytesRead : DWORD* in/out -> "sptr"
; pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> "sptr"
; ※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 "WININET.dll"
#cfunc global HttpWebSocketReceive "HttpWebSocketReceive" sptr, sptr, int, var, var
; res = HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType)
; hWebSocket : void* -> "sptr"
; pvBuffer : void* out -> "sptr"
; dwBufferLength : DWORD -> "int"
; pdwBytesRead : DWORD* in/out -> "var"
; pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> "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。
出力引数:
; BOOL HttpWebSocketReceive(void* hWebSocket, void* pvBuffer, DWORD dwBufferLength, DWORD* pdwBytesRead, HTTP_WEB_SOCKET_BUFFER_TYPE* pBufferType)
#uselib "WININET.dll"
#cfunc global HttpWebSocketReceive "HttpWebSocketReceive" intptr, intptr, int, var, var
; res = HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType)
; hWebSocket : void* -> "intptr"
; pvBuffer : void* out -> "intptr"
; dwBufferLength : DWORD -> "int"
; pdwBytesRead : DWORD* in/out -> "var"
; pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> "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。
import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procHttpWebSocketReceive = wininet.NewProc("HttpWebSocketReceive")
)

// hWebSocket (void*), pvBuffer (void* out), dwBufferLength (DWORD), pdwBytesRead (DWORD* in/out), pBufferType (HTTP_WEB_SOCKET_BUFFER_TYPE* out)
r1, _, err := procHttpWebSocketReceive.Call(
	uintptr(hWebSocket),
	uintptr(pvBuffer),
	uintptr(dwBufferLength),
	uintptr(pdwBytesRead),
	uintptr(pBufferType),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL
function HttpWebSocketReceive(
  hWebSocket: Pointer;   // void*
  pvBuffer: Pointer;   // void* out
  dwBufferLength: DWORD;   // DWORD
  pdwBytesRead: Pointer;   // DWORD* in/out
  pBufferType: Pointer   // HTTP_WEB_SOCKET_BUFFER_TYPE* out
): BOOL; stdcall;
  external 'WININET.dll' name 'HttpWebSocketReceive';
result := DllCall("WININET\HttpWebSocketReceive"
    , "Ptr", hWebSocket   ; void*
    , "Ptr", pvBuffer   ; void* out
    , "UInt", dwBufferLength   ; DWORD
    , "Ptr", pdwBytesRead   ; DWORD* in/out
    , "Ptr", pBufferType   ; HTTP_WEB_SOCKET_BUFFER_TYPE* out
    , "Int")   ; return: BOOL
●HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType) = DLL("WININET.dll", "bool HttpWebSocketReceive(void*, void*, dword, void*, void*)")
# 呼び出し: HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType)
# hWebSocket : void* -> "void*"
# pvBuffer : void* out -> "void*"
# dwBufferLength : DWORD -> "dword"
# pdwBytesRead : DWORD* in/out -> "void*"
# pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> "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 "wininet" fn HttpWebSocketReceive(
    hWebSocket: ?*anyopaque, // void*
    pvBuffer: ?*anyopaque, // void* out
    dwBufferLength: u32, // DWORD
    pdwBytesRead: [*c]u32, // DWORD* in/out
    pBufferType: [*c]i32 // HTTP_WEB_SOCKET_BUFFER_TYPE* out
) callconv(std.os.windows.WINAPI) i32;
proc HttpWebSocketReceive(
    hWebSocket: pointer,  # void*
    pvBuffer: pointer,  # void* out
    dwBufferLength: uint32,  # DWORD
    pdwBytesRead: ptr uint32,  # DWORD* in/out
    pBufferType: ptr int32  # HTTP_WEB_SOCKET_BUFFER_TYPE* out
): int32 {.importc: "HttpWebSocketReceive", stdcall, dynlib: "WININET.dll".}
pragma(lib, "wininet");
extern(Windows)
int HttpWebSocketReceive(
    void* hWebSocket,   // void*
    void* pvBuffer,   // void* out
    uint dwBufferLength,   // DWORD
    uint* pdwBytesRead,   // DWORD* in/out
    int* pBufferType   // HTTP_WEB_SOCKET_BUFFER_TYPE* out
);
ccall((:HttpWebSocketReceive, "WININET.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{Cvoid}, UInt32, Ptr{UInt32}, Ptr{Int32}),
      hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType)
# hWebSocket : void* -> Ptr{Cvoid}
# pvBuffer : void* out -> Ptr{Cvoid}
# dwBufferLength : DWORD -> UInt32
# pdwBytesRead : DWORD* in/out -> Ptr{UInt32}
# pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> Ptr{Int32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
int32_t HttpWebSocketReceive(
    void* hWebSocket,
    void* pvBuffer,
    uint32_t dwBufferLength,
    uint32_t* pdwBytesRead,
    int32_t* pBufferType);
]]
local wininet = ffi.load("wininet")
-- wininet.HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType)
-- hWebSocket : void*
-- pvBuffer : void* out
-- dwBufferLength : DWORD
-- pdwBytesRead : DWORD* in/out
-- pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out
-- 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('WININET.dll');
const HttpWebSocketReceive = lib.func('__stdcall', 'HttpWebSocketReceive', 'int32_t', ['void *', 'void *', 'uint32_t', 'uint32_t *', 'int32_t *']);
// HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType)
// hWebSocket : void* -> 'void *'
// pvBuffer : void* out -> 'void *'
// dwBufferLength : DWORD -> 'uint32_t'
// pdwBytesRead : DWORD* in/out -> 'uint32_t *'
// pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> 'int32_t *'
// 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("WININET.dll", {
  HttpWebSocketReceive: { parameters: ["pointer", "pointer", "u32", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType)
// hWebSocket : void* -> "pointer"
// pvBuffer : void* out -> "pointer"
// dwBufferLength : DWORD -> "u32"
// pdwBytesRead : DWORD* in/out -> "pointer"
// pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> "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
int32_t HttpWebSocketReceive(
    void* hWebSocket,
    void* pvBuffer,
    uint32_t dwBufferLength,
    uint32_t* pdwBytesRead,
    int32_t* pBufferType);
C, "WININET.dll");
// $ffi->HttpWebSocketReceive(hWebSocket, pvBuffer, dwBufferLength, pdwBytesRead, pBufferType);
// hWebSocket : void*
// pvBuffer : void* out
// dwBufferLength : DWORD
// pdwBytesRead : DWORD* in/out
// pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out
// 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 Wininet extends StdCallLibrary {
    Wininet INSTANCE = Native.load("wininet", Wininet.class);
    boolean HttpWebSocketReceive(
        Pointer hWebSocket,   // void*
        Pointer pvBuffer,   // void* out
        int dwBufferLength,   // DWORD
        IntByReference pdwBytesRead,   // DWORD* in/out
        IntByReference pBufferType   // HTTP_WEB_SOCKET_BUFFER_TYPE* out
    );
}
@[Link("wininet")]
lib LibWININET
  fun HttpWebSocketReceive = HttpWebSocketReceive(
    hWebSocket : Void*,   # void*
    pvBuffer : Void*,   # void* out
    dwBufferLength : UInt32,   # DWORD
    pdwBytesRead : UInt32*,   # DWORD* in/out
    pBufferType : Int32*   # HTTP_WEB_SOCKET_BUFFER_TYPE* out
  ) : Int32
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 HttpWebSocketReceiveNative = Int32 Function(Pointer<Void>, Pointer<Void>, Uint32, Pointer<Uint32>, Pointer<Int32>);
typedef HttpWebSocketReceiveDart = int Function(Pointer<Void>, Pointer<Void>, int, Pointer<Uint32>, Pointer<Int32>);
final HttpWebSocketReceive = DynamicLibrary.open('WININET.dll')
    .lookupFunction<HttpWebSocketReceiveNative, HttpWebSocketReceiveDart>('HttpWebSocketReceive');
// hWebSocket : void* -> Pointer<Void>
// pvBuffer : void* out -> Pointer<Void>
// dwBufferLength : DWORD -> Uint32
// pdwBytesRead : DWORD* in/out -> Pointer<Uint32>
// pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function HttpWebSocketReceive(
  hWebSocket: Pointer;   // void*
  pvBuffer: Pointer;   // void* out
  dwBufferLength: DWORD;   // DWORD
  pdwBytesRead: Pointer;   // DWORD* in/out
  pBufferType: Pointer   // HTTP_WEB_SOCKET_BUFFER_TYPE* out
): BOOL; stdcall;
  external 'WININET.dll' name 'HttpWebSocketReceive';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "HttpWebSocketReceive"
  c_HttpWebSocketReceive :: Ptr () -> Ptr () -> Word32 -> Ptr Word32 -> Ptr Int32 -> IO CInt
-- hWebSocket : void* -> Ptr ()
-- pvBuffer : void* out -> Ptr ()
-- dwBufferLength : DWORD -> Word32
-- pdwBytesRead : DWORD* in/out -> Ptr Word32
-- pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> Ptr Int32
-- 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 httpwebsocketreceive =
  foreign "HttpWebSocketReceive"
    ((ptr void) @-> (ptr void) @-> uint32_t @-> (ptr uint32_t) @-> (ptr int32_t) @-> returning int32_t)
(* hWebSocket : void* -> (ptr void) *)
(* pvBuffer : void* out -> (ptr void) *)
(* dwBufferLength : DWORD -> uint32_t *)
(* pdwBytesRead : DWORD* in/out -> (ptr uint32_t) *)
(* pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> (ptr int32_t) *)
(* 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 wininet (t "WININET.dll"))
(cffi:use-foreign-library wininet)

(cffi:defcfun ("HttpWebSocketReceive" http-web-socket-receive :convention :stdcall) :int32
  (h-web-socket :pointer)   ; void*
  (pv-buffer :pointer)   ; void* out
  (dw-buffer-length :uint32)   ; DWORD
  (pdw-bytes-read :pointer)   ; DWORD* in/out
  (p-buffer-type :pointer))   ; HTTP_WEB_SOCKET_BUFFER_TYPE* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $HttpWebSocketReceive = Win32::API::More->new('WININET',
    'BOOL HttpWebSocketReceive(LPVOID hWebSocket, LPVOID pvBuffer, DWORD dwBufferLength, LPVOID pdwBytesRead, LPVOID pBufferType)');
# my $ret = $HttpWebSocketReceive->Call($hWebSocket, $pvBuffer, $dwBufferLength, $pdwBytesRead, $pBufferType);
# hWebSocket : void* -> LPVOID
# pvBuffer : void* out -> LPVOID
# dwBufferLength : DWORD -> DWORD
# pdwBytesRead : DWORD* in/out -> LPVOID
# pBufferType : HTTP_WEB_SOCKET_BUFFER_TYPE* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

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