C++ HTTP Requests: Send & Receive Guide

In C++, third-party libraries like curlcpp and cpprestsdk can be used to send and receive HTTP requests. Here is an example code using the cpprestsdk library to send an HTTP GET request.

#include <cpprest/http_client.h>
#include <cpprest/filestream.h>

using namespace web;
using namespace web::http;
using namespace web::http::client;

int main() {
    // 创建一个http_client对象
    http_client client(U("http://www.example.com"));

    // 发送一个GET请求
    client.request(methods::GET).then([](http_response response) {
        if (response.status_code() == status_codes::OK) {
            // 将响应消息主体保存到文件中
            concurrency::streams::ofstream::open_ostream(U("response.txt")).then([=](concurrency::streams::ostream output) {
                return response.body().read_to_end(output.streambuf());
            }).then([=](size_t) {
                // 读取完成
                std::wcout << L"File saved" << std::endl;
            }).wait();
        }
    }).wait();

    return 0;
}

The above code uses the cpprestsdk library to send an HTTP GET request to http://www.example.com and saves the response message body to a file named response.txt. You can modify the code as needed to send different types of HTTP requests and handle responses.