在 C++ 中，使用 WinHTTP 库处理 HTTP 响应头的方法如下：
首先，确保已经包含了必要的头文件并链接到了winhttp.lib 库。#include<iostream>#include<windows.h>#include <winhttp.h>#pragma comment(lib, "winhttp.lib")使用 WinHttpOpen()、WinHttpConnect() 和 WinHttpOpenRequest() 函数初始化 HTTP 请求。
使用 WinHttpSendRequest() 函数发送 HTTP 请求。
使用 WinHttpReceiveResponse() 函数接收 HTTP 响应。
使用 WinHttpQueryHeaders() 函数查询和处理响应头。
以下是一个完整的示例代码：
#include<iostream>#include<windows.h>#include <winhttp.h>#pragma comment(lib, "winhttp.lib")int main() { // 初始化 HTTP 会话 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 HTTP session."<< 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."<< std::endl; WinHttpCloseHandle(hSession); return -1; } // 打开 HTTP 请求 HINTERNET hRequest = WinHttpOpenRequest(hConnect, L"GET", L"/path", NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, WINHTTP_FLAG_SECURE); if (!hRequest) { std::cerr << "Error opening request."<< std::endl; WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return -1; } // 发送 HTTP 请求 BOOL bResult = WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0); if (!bResult) { std::cerr << "Error sending request."<< std::endl; WinHttpCloseHandle(hRequest); WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return -1; } // 接收 HTTP 响应 bResult = WinHttpReceiveResponse(hRequest, NULL); if (!bResult) { std::cerr << "Error receiving response."<< std::endl; WinHttpCloseHandle(hRequest); WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return -1; } // 查询和处理响应头 DWORD dwSize = 0; WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_RAW_HEADERS_CRLF, WINHTTP_HEADER_NAME_BY_INDEX, NULL, &dwSize, WINHTTP_NO_HEADER_INDEX); std::wstring headers(dwSize / sizeof(wchar_t), L'\0'); bResult = WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_RAW_HEADERS_CRLF, WINHTTP_HEADER_NAME_BY_INDEX, &headers[0], &dwSize, WINHTTP_NO_HEADER_INDEX); if (!bResult) { std::cerr << "Error querying headers."<< std::endl; WinHttpCloseHandle(hRequest); WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return -1; } std::wcout << L"Response headers:"<< std::endl<< headers<< std::endl; // 关闭句柄 WinHttpCloseHandle(hRequest); WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return 0;}这个示例代码将连接到 example.com 服务器，发送一个 GET 请求，然后输出响应头。注意，你需要根据实际情况修改服务器地址和请求路径。
