MFC 调用 Http接口 可用库

libCurl 不稳定。

https://github.com/JelinYao/HttpInterface

获得的字符串 再AsCString即可。

std::wstring ANSI2unicode(const char *psz, const DWORD &codePage)
{
	if (!psz) return std::wstring(L"");

	int nLength, nLen;
	wchar_t *pBuffer;

	nLen = (int)strlen(psz);
	nLength = ::MultiByteToWideChar(codePage, 0, psz, nLen, NULL, 0);
	pBuffer = new wchar_t[nLength + 1];
	memset(pBuffer, 0, (nLength + 1)*sizeof(wchar_t));
	::MultiByteToWideChar(codePage, 0, psz, nLen, (LPWSTR)pBuffer, nLength);
	std::wstring wstr(pBuffer);
	delete[] pBuffer;
	return wstr;
}

std::string unicode2ANSI(const wchar_t *psz, const DWORD &codePage)
{
	if (!psz) return std::string("");
	
	char *pBuffer;
	int nLength;
	int nLen;

	nLen = (int)wcslen(psz);
	nLength = ::WideCharToMultiByte(codePage, 0, psz, nLen, NULL, 0, 0, 0);
	int rc = ::GetLastError();
	pBuffer = new char[nLength + 1];
	memset(pBuffer, 0, (nLength + 1)*sizeof(char));
	::WideCharToMultiByte(codePage, 0, psz, nLen, pBuffer, nLength, 0, 0);
	std::string str(pBuffer);
	delete[] pBuffer;
	return str;
}

CString AsCString(const char *str)
{
	std::wstring wstr;
	if (NULL != str)
		wstr = ANSI2unicode(str, CP_UTF8);
	return wstr.c_str();
}

CString AsCString(std::string str)
{
	return AsCString(str.c_str());
}

std::string AsString(const wchar_t *pszStr)
{
	std::string str;
	if (NULL != pszStr)
		str = unicode2ANSI(pszStr, CP_UTF8);
	return str;
}