如果代理服务器 Winhttp 认证失败

Question

#include <windows.h>
#include <winhttp.h>
#include <stdio.h>
#pragma comment(lib, "winhttp.lib")
int main()
{   
    static BOOL bRet = FALSE;
    TCHAR szHostName[MAX_PATH] = L"www.google.com";
    HINTERNET hSession = NULL;
    HINTERNET hConnect = NULL;
    HINTERNET hRequest = NULL;
    const TCHAR BROWSER_INFO[] = L"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 1.1.4322; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";
    const WCHAR *WWIZHTTP_TYPES[] = { L"Accept: image/gif", L"image/x-xbitmap", L"image/jpeg", L"image/pjpeg", L"application/x-shockwave-flash", L"application/x-ms-application", L"application/x-ms-xbap", L"application/vnd.ms-xpsdocument", L"application/xaml+xml", L"application/msword", L"application/vnd.ms-excel", L"application/x-cabinet-win32-x86", L"application/x-pe-win32-x86", L"application/octet-stream", L"application/x-setupscript", L"*//*", NULL };

    hSession = WinHttpOpen(BROWSER_INFO, WINHTTP_ACCESS_TYPE_NAMED_PROXY, L"172.168.1.196:808", L"<local>", 0);

    if (hSession)
    {
        hConnect = WinHttpConnect(hSession, szHostName, INTERNET_DEFAULT_HTTP_PORT, 0);
    }
    if (hConnect)
    {
        hRequest = WinHttpOpenRequest(hConnect, L"GET", NULL, NULL, WINHTTP_NO_REFERER, WWIZHTTP_TYPES, 0);
    }
    if (hRequest)
    {

        //provide username and password

        WinHttpSetCredentials(hRequest, WINHTTP_AUTH_TARGET_PROXY, WINHTTP_AUTH_SCHEME_BASIC, L"abc", L"abc", NULL);

        // Send a request.
        bRet = WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0);

        // End the request.         
        if (bRet)
            bRet = WinHttpReceiveResponse(hRequest, NULL);

        if (bRet)
        {
            DWORD dwStatusCode = 0;
            DWORD dwTemp = sizeof(dwStatusCode);
            WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_STATUS_CODE | WINHTTP_QUERY_FLAG_NUMBER, NULL, &dwStatusCode, &dwTemp, NULL);
            if ((dwStatusCode >= HTTP_STATUS_CONTINUE) && (dwStatusCode < HTTP_STATUS_BAD_REQUEST))
            {
                bRet = TRUE;
            }
            else
            {
                bRet = FALSE;
            }
        }
        if (bRet == TRUE)
            MessageBox(NULL, L"HIT", L"",0);
    }
    return 0;
}

在上面的代码中，当为代理服务器设置了用户名密码时，WinHttpQueryHeaders() 的返回值为 407。这里 WinHttpSetCredentials() 用于提供用户名和密码，但 dwStatusCode 的返回值仍然是 407。如果代理服务器是 如果没有用户名密码，则上面的代码按要求工作，即dwStatusCode 的返回值为 200。但在身份验证的情况下，此代码将失败。

我在这个示例中使用CCProxy version 8.0。请指导正确的解决方案。

Answer 1

请注意this document 中的示例，如果响应了代理身份验证质询，请在每个SendRequest 之前重置这些凭据，因为代理可能需要在响应后重新进行身份验证。

如果仍然无法正常工作，您可能需要使用WinHttpSetOption 而不是WinHttpSetCredentials 来设置代理身份验证， 示例：

if (!WinHttpSetOption(session, WINHTTP_OPTION_PROXY_USERNAME, proxy_username, proxy_username_len)) 
{
    //do error operation.
}
if (!WinHttpSetOption(session, WINHTTP_OPTION_PROXY_PASSWORD, proxy_password, proxy_password_len)) 
{
    //do error operation.
}