在C++中，使用WinHttp库处理HTTP重定向的方法如下：
首先，包含必要的头文件并链接到WinHttp库。#include<iostream>#include<windows.h>#include <winhttp.h>#pragma comment(lib, "winhttp.lib")BOOL HandleRedirection(HINTERNET hRequest, LPCWSTR url) { // 发送请求 BOOL bResults = WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0); if (!bResults) { std::cerr << "Error sending request: "<< GetLastError()<< std::endl; return FALSE; } // 接收响应 bResults = WinHttpReceiveResponse(hRequest, NULL); if (!bResults) { std::cerr << "Error receiving response: "<< GetLastError()<< std::endl; return FALSE; } // 获取响应状态码 DWORD dwStatusCode = 0; DWORD dwSize = sizeof(dwStatusCode); bResults = WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_STATUS_CODE | WINHTTP_QUERY_FLAG_NUMBER, NULL, &dwStatusCode, &dwSize, NULL); if (!bResults) { std::cerr << "Error querying headers: "<< GetLastError()<< std::endl; return FALSE; } // 检查是否为重定向状态码 if (dwStatusCode >= 300 && dwStatusCode < 400) { // 获取重定向URL WCHAR redirectUrl[2048]; DWORD redirectUrlSize = sizeof(redirectUrl); bResults = WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_LOCATION, NULL, redirectUrl, &redirectUrlSize, NULL); if (!bResults) { std::cerr << "Error querying location header: "<< GetLastError()<< std::endl; return FALSE; } // 关闭当前请求 WinHttpCloseHandle(hRequest); // 递归处理重定向 return HandleRedirection(hRequest, redirectUrl); } // 非重定向状态码，处理响应 // ... return TRUE;}HandleRedirection函数。int main() { // 初始化WinHttp HINTERNET hSession = WinHttpOpen(L"MyUserAgent", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0); if (!hSession) { std::cerr << "Error opening session: "<< GetLastError()<< std::endl; return 1; } // 连接到服务器 HINTERNET hConnect = WinHttpConnect(hSession, L"example.com", INTERNET_DEFAULT_HTTPS_PORT, 0); if (!hConnect) { std::cerr << "Error connecting to server: "<< GetLastError()<< std::endl; WinHttpCloseHandle(hSession); return 1; } // 创建请求 HINTERNET hRequest = WinHttpOpenRequest(hConnect, L"GET", L"/path/to/resource", NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, WINHTTP_FLAG_SECURE); if (!hRequest) { std::cerr << "Error opening request: "<< GetLastError()<< std::endl; WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return 1; } // 处理重定向 BOOL bResults = HandleRedirection(hRequest, L"https://example.com/path/to/resource"); if (!bResults) { std::cerr << "Error handling redirection: "<< GetLastError()<< std::endl; WinHttpCloseHandle(hRequest); WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return 1; } // 关闭句柄 WinHttpCloseHandle(hRequest); WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return 0;}这个示例展示了如何使用WinHttp库处理HTTP重定向。请注意，这个示例仅适用于简单的重定向场景。对于更复杂的场景，可能需要根据实际需求进行相应的修改。
