C++怎么使用WinINet和WinHTTP实现Http访问

使用WinINet实现HTTP访问：

包含头文件：#include <wininet.h> 初始化WinINet：调用InternetOpen函数创建一个会话句柄。HINTERNET hInternet =InternetOpen(L"MyApp", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0); if (hInternet == NULL) { // 处理错误 return; } 打开HTTP连接：调用InternetOpenUrl函数打开一个HTTP连接。HINTERNET hConnect = InternetOpenUrl(hInternet, L"http://www.example.com", NULL, 0, INTERNET_FLAG_RELOAD, 0); if (hConnect == NULL) { // 处理错误 InternetCloseHandle(hInternet); return; } 读取HTTP响应：使用InternetReadFile函数读取HTTP响应内容。char buffer[4096]; DWORD bytesRead; while (InternetReadFile(hConnect, buffer, sizeof(buffer), &bytesRead) && bytesRead >0) { // 处理读取的数据 // ... } 关闭连接和会话：调用InternetCloseHandle函数关闭HTTP连接和会话。InternetCloseHandle(hConnect); InternetCloseHandle(hInternet);

使用WinHTTP实现HTTP访问：

包含头文件：#include <winhttp.h> 初始化WinHTTP：调用WinHttpOpen函数创建一个会话句柄。HINTERNET hSession =WinHttpOpen(L"MyApp", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS,0); if (hSession == NULL) { // 处理错误 return; } 打开HTTP连接：调用WinHttpOpenRequest和WinHttpSendRequest函数打开一个HTTP连接，并发送请求。HINTERNET hConnect =WinHttpOpenRequest(hSession, L"GET", L"/", NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES,0); if (hConnect == NULL) { // 处理错误 WinHttpCloseHandle(hSession); return; } if (!WinHttpSendRequest(hConnect, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0)) { // 处理错误 WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession); return; } 读取HTTP响应：使用WinHttpReadData函数读取HTTP响应内容。char buffer[4096]; DWORD bytesRead; while (WinHttpReadData(hConnect, buffer,sizeof(buffer), &bytesRead) && bytesRead > 0) { // 处理读取的数据 // ...} 关闭连接和会话：调用WinHttpCloseHandle函数关闭HTTP连接和会话。WinHttpCloseHandle(hConnect); WinHttpCloseHandle(hSession);