HttpSendRequestA为假并返回0

Question

[嗨，我正尝试使用WinInet和Costum用户代理下载某些内容，问题是我在HttpSendRequestA上失败，返回的错误为0我不知道此错误是什么意思，我已经尝试过查找但什么都没有发生我使用std::to_string(GetLastError());收到错误这是代码框[]

std::string GetUrlData(const std::string& resource, const std::string& host)
{
    std::string output = "";
    output.clear();

    HINTERNET hIntSession = InternetOpenA("token", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
    if (!hIntSession) {
        return "ERROR: Session Cannot Start";
    }

    HINTERNET hHttpSession = InternetConnectA(hIntSession, host.c_str(), 80, 0, 0, INTERNET_SERVICE_HTTP, 0, NULL);
    if (!hHttpSession) {
        InternetCloseHandle(hIntSession);
        return "ERROR: Cannot Connect To Internet";
    }

    HINTERNET hHttpRequest = HttpOpenRequestA(hHttpSession, "GET", resource.c_str(), 0, 0, 0, INTERNET_FLAG_RELOAD, 0);
    if (!hHttpRequest) {
        InternetCloseHandle(hHttpSession);
        InternetCloseHandle(hIntSession);
        return "ERROR: Http Request Failed";
    }

   // const char* szHeaders = "User-Agent: Mozzila\r\n";
    if (!HttpSendRequestA(hHttpRequest, NULL, 0, NULL, 0)) {
        InternetCloseHandle(hHttpRequest);
        InternetCloseHandle(hHttpSession);
        InternetCloseHandle(hIntSession);
        return "ERROR: Http Request Failed 2";

    }

    char szBuffer[1024];
    DWORD dwRead = 0;

    do {
        if (!InternetReadFile(hHttpRequest, szBuffer, sizeof(szBuffer), &dwRead)) {
            InternetCloseHandle(hHttpRequest);
            InternetCloseHandle(hHttpSession);
            InternetCloseHandle(hIntSession);
            return "ERROR: Cannot Download";
        }

        if (dwRead == 0)
            break;

        output.append(szBuffer, dwRead);
    }
    while (true);
    return output;
}
我称此功能为std :: stringdata = GetUrlData("http://example.com/", "http://example.com/");

[嗨，我正尝试使用WinInet和Costum用户代理下载某些内容，问题是我在HttpSendRequestA失败，返回的错误是0，我不知道此错误意味着我已经尝试过...

Answer 1

问题在于，您的host参数应仅是主机名，而不是完整的URL。