How to make a HTTP request in C++ code, give me 2 examples using pure C++ and using external library, which is more efficient?
user
To make an HTTP request in C++, you can either write the code yourself using only the standard C++ libraries, or use an external library that provides a higher-level API.

Here are two examples of making an HTTP request using pure C++:

c

#include <iostream>
#include <string>
#include <sstream>
#include <fstream>
#include <streambuf>
#include <algorithm>
#include <unordered_map>
#include <curl/curl.h>

std::string get_url(const std::string& url)
{
    CURL* curl = curl_easy_init();
    if (!curl) {
        return "";
    }

    std::stringstream ss;
    curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, [&](char* data, std::size_t size, std::size_t nmemb, void* userp) -> std::size_t {
        ss.write(data, size * nmemb);
        return size * nmemb;
    });
    curl_easy_perform(curl);
    curl_easy_cleanup(curl);

    return ss.str();
}

int main()
{
    std::string response = get_url("https://www.example.com");
    std::cout << response << std::endl;

    return 0;
}
And here's an example using an external library, such as libcurl:

c

#include <iostream>
#include <string>
#include <sstream>
#include <fstream>
#include <streambuf>
#include <algorithm>
#include <unordered_map>
#include <curl/curl.h>

std::string get_url(const std::string& url)
{
    CURL* curl = curl_easy_init();
    if (!curl) {
        return "";
    }

    std::stringstream ss;
    curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, [&](char* data, std::size_t size, std::size_t nmemb, void* userp) -> std::size_t {
        ss.write(data, size * nmemb);
        return size * nmemb;
    });
    curl_easy_perform(curl);
    curl_easy_cleanup(curl);

    return ss.str();
}

int main()
{
    std::string response = get_url("https://www.example.com");
    std::cout << response << std::endl;

    return 0;
}
As for efficiency, using an external library such as libcurl can be more efficient because it provides a higher-level API that abstracts away much of the low-level details involved in making an HTTP request. This makes it easier to write code that is more concise and less error-prone, and also eliminates the
assistant
Please complete the last paragraph.
user
This makes it easier to write code that is more concise and less error-prone, and also eliminates the need to manually handle the details of setting up and managing an HTTP request. Additionally, using an external library can also provide additional features such as connection pooling, request retries, and more, which can help improve the performance of your application.
assistant