c++ 实现发送http请求

以下是两种C++实现发送HTTP请求的例子：

1. 使用WinINet库发送HTTP请求

#include <windows.h>
#include <wininet.h>

void urlopen(_TCHAR* url) {
    HINTERNET hSession = InternetOpen(L"HTTP Example", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
    if (hSession != NULL) {
        HINTERNET hConnect = InternetOpenUrl(hSession, url, NULL, 0, INTERNET_FLAG_RELOAD, 0);
        if (hConnect != NULL) {
            char buffer[MAXSIZE];
            DWORD bytesRead;
            while (InternetReadFile(hConnect, buffer, sizeof(buffer), &bytesRead) && bytesRead > 0) {
                // 处理接收到的数据
            }
            InternetCloseHandle(hConnect);
        }
        InternetCloseHandle(hSession);
    }
}

int main() {
    _TCHAR* url = L"http://coderzh.cnblogs.com";
    urlopen(url);
    return 0;
}

2. 使用WinHTTP库发送HTTP请求

#include <windows.h>
#include <winhttp.h>

void urlopen(_TCHAR* url) {
    HINTERNET hSession = WinHttpOpen(L"HTTP Example", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);
    if (hSession != NULL) {
        HINTERNET hConnect = WinHttpOpenRequest(hSession, L"GET", url, NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, 0);
        if (hConnect != NULL) {
            if (WinHttpSendRequest(hConnect, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0)) {
                if (WinHttpReceiveResponse(hConnect, NULL)) {
                    char buffer[MAXSIZE];
                    DWORD bytesRead;
                    while (WinInternetReadFile(hConnect, buffer, sizeof(buffer), &bytesRead) && bytesRead > 0) {
                        // 处理接收到的数据
                    }
                }
            }
            WinHttpCloseHandle(hConnect);
        }
        WinHttpCloseHandle(hSession);
    }
}

int main() {
    _TCHAR* url = L"http://coderzh.cnblogs.com";
    urlopen(url);
    return 0;
}