カスタムURLスキームでエクスプローラーを起動してフォルダを開く msiビルド全手順

#include <windows.h>

#include <iostream>

#include <string>

#include <stdio.h>

static std::string urldecode(const char * url) {
  int ln = 0;
  std::string conv;
  const char * pt = url;
  while ( * pt) {
    if ( * pt == '%') {
      char bf[3];
      bf[0] = pt[1];
      bf[1] = pt[2];
      bf[2] = '\0';
      int ch;
      ch = strtol(bf, NULL, 16);
      conv += ch;
      pt += 3;
    } else if ( * pt == '+') {
      conv += ' ';
      pt++;
    } else {
      conv += * pt;
      pt++;
    }
    ln++;
  }
  return conv;
}

std::wstring utf8tounicode(const char * utf) {
  const unsigned char * src = (const unsigned char * ) utf;
  unsigned char * uni = new unsigned char[strlen((const char * ) utf) * 2 + 2];
  unsigned char * dst = uni;
  while ( * src) {
    if ( * src <= 0xc0) { //	1 byte
      dst[1] = 0;
      dst[0] = src[0];
      dst += 2;
      src += 1;
    } else if ( * src <= 0xe0) { //	2 bytes
      dst[1] = (src[0] >> 2) & 0x07;
      dst[0] = ((src[0] << 6) & 0xc0) | (src[1] & 0x3f);
      dst += 2;
      src += 2;
    } else if ( * src <= 0xf8) { //	3 bytes
      dst[1] = ((src[0] << 4) & 0xf0) | ((src[1] >> 2) & 0x0f);
      dst[0] = ((src[1] << 6) & 0xc0) | ((src[2]) & 0x3f);
      if (dst[1] == 0x30 && dst[0] == 0x1c) {
        dst[1] = 0xff;
        dst[0] = 0x5e;
      }
      dst += 2;
      src += 3;
    } else { //	4 bytes
      dst[3] = 0;
      dst[2] = ((src[0] << 2) & 0x1c) | ((src[1] >> 4) & 0x03);
      dst[1] = ((src[1] << 4) & 0xf0) | ((src[2] >> 2) & 0x0f);
      dst[0] = ((src[2] << 6) & 0xc0) | ((src[2] >> 2) & 0x0f);
      dst += 4;
      src += 4;
    }
  }
  dst[0] = 0;
  dst[1] = 0;
  std::wstring result = (WCHAR * ) uni;
  return result;
}

std::wstring rtrim(const std::wstring & str,
  const std::wstring & charlist) {
  if (str.empty()) return str;
  WCHAR * bf = _wcsdup(str.c_str());
  WCHAR * ed = bf + wcslen(bf) - 1;
  while (ed != bf) {
    if (!wcschr(charlist.c_str(), * ed)) break;
    * ed = 0;
    ed--;
  }
  std::wstring result = bf;
  free(bf);
  return result;
}

void put_log(LPCTSTR form, ...) {
  char str[2048];
  va_list args;
  va_start(args, form);
  vsprintf_s(str, sizeof(str), form, args);
  char temp[MAX_PATH];::GetTempPath(sizeof(temp), temp);
  std::string path = std::string(temp) + "ExplorerProtocolHandler.log";
  HANDLE hFile;
  hFile = ::CreateFile(path.c_str(),
    GENERIC_WRITE,
    FILE_SHARE_READ,
    NULL,
    OPEN_ALWAYS,
    FILE_ATTRIBUTE_ARCHIVE,
    0);
  if (hFile != INVALID_HANDLE_VALUE) {
    ::SetFilePointer(hFile, 0, NULL, FILE_END);

    SYSTEMTIME tm;::GetLocalTime( & tm);
    char dt[1024];
    sprintf_s(dt, sizeof(dt), "[%4d/%02d/%02d %02d:%02d:%02d.%03d] %s\r\n",
      tm.wYear, tm.wMonth, tm.wDay, tm.wHour, tm.wMinute, tm.wSecond, tm.wMilliseconds,
      str);
    DWORD wl;::WriteFile(hFile, dt, strlen(dt), & wl, NULL);::CloseHandle(hFile);
  }
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
  char * cmd = ::GetCommandLie();
  put_log("(%d): %s", __LINE__, cmd);//%USERPROFILE%\AppData\Local\Tempにログ出力
  //ExplorerProtocolHandler.log
  //[2022/02/08 23:10:39.788] (140): "C:\Users\admin\AppData\Local\ExplorerProtocolHandler\ExplorerProtocolHandler.exe" "diropen://NAS1/admin/ExplorerProtocolHandler/"
  //[2022/02/08 23:10:39.788] (152): //NAS1/admin/ExplorerProtocolHandler/"
  if (cmd[0] == '\"') {
    cmd = strchr(cmd + 1, '\"') + 2;//コマンドラインからカスタムURL文字列開始位置を返す（exeの呼び出しが"で囲まれている場合。）
  } else {
    cmd = strchr(cmd, ' ') + 1;//コマンドラインからカスタムURLの位置を返す（exeの呼び出しが"で囲まれていない場合。）
  }
  std::wstring dir = utf8tounicode(urldecode(cmd).c_str());//URLデコード→UTF8→Unicode
  int pos = dir.find(L':');//:の位置
  if (pos != std::string::npos) {//:が有る場合
    dir = dir.substr(pos + 1);//:の後ろの部分取り出し //NAS1...
  }
  ::ShellExecuteW(NULL, NULL, L"explorer.exe", (L"file:" + dir).c_str(), NULL, SW_SHOWNORMAL);//file://NAS1...を引数にしてエクスプローラ起動。Unicodeのため、Lプレフィックス
}