Function DoBlockingHttpCall

3rdparty/rainterface/RA_Interface.cpp:365–567

typedef size_t (DownloadFunc)(char* pData, size_t nDataSize, void* pUserData, DWORD* pStatusCode);

static BOOL DoBlockingHttpCall(const char* sHostUrl, const char* sRequestedPage, const char* sPostData,
  DownloadFunc fnDownload, void* pDownloadUserData, DWORD* pBytesRead, DWORD* pStatusCode, IProgressDialog* pProgressDialog)
{
    BOOL bResults = FALSE, bSuccess = FALSE;
    HINTERNET hSession = nullptr, hConnect = nullptr, hRequest = nullptr;
    size_t nHostnameLen;

    WCHAR wBuffer[1024];
    size_t nTemp;
    DWORD nBytesAvailable = 0;
    DWORD nBytesToRead = 0;
    DWORD nBytesFetched = 0;
    (*pBytesRead) = 0;

    INTERNET_PORT nPort = INTERNET_DEFAULT_HTTP_PORT;
    const char* sHostName = sHostUrl;
    if (_strnicmp(sHostName, "http://", 7) == 0)
    {
        sHostName += 7;
    }
    else if (_strnicmp(sHostName, "https://", 8) == 0)
    {
        sHostName += 8;
        nPort = INTERNET_DEFAULT_HTTPS_PORT;
    }

    const char* sPort = strchr(sHostName, ':');
    if (sPort)
    {
        nHostnameLen = sPort - sHostName;
        nPort = atoi(sPort + 1);
    }
    else
    {
        nHostnameLen = strlen(sHostName);
    }

    // Use WinHttpOpen to obtain a session handle.
    hSession = WinHttpOpen(L"RetroAchievements Client Bootstrap",
        WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
        WINHTTP_NO_PROXY_NAME,
        WINHTTP_NO_PROXY_BYPASS, 0);

    // Specify an HTTP server.
    if (hSession == nullptr)
    {
        *pStatusCode = GetLastError();
    }
    else
    {
#if defined(_MSC_VER) && _MSC_VER >= 1400
        mbstowcs_s(&nTemp, wBuffer, sizeof(wBuffer) / sizeof(wBuffer[0]), sHostName, nHostnameLen);
#else
        nTemp = mbstowcs(wBuffer, sHostName, nHostnameLen);
        if (nTemp > 0)
            wBuffer[nTemp] = '\0';
#endif