揭秘浏览器键入URI到页面显示的过程: 浏览器键入URI，到页面显示，中间发生什么？

package main
import (

"fmt"

"net"

"net/http"

"time"

)
func main() {

// 用户输入的URI

uri := "https://www.example.com"
// 解析URI获取主机名和端口
host, port, err := net.SplitHostPort(uri)
if err != nil {
	fmt.Println("Error:", err)
	return
}

// 建立TCP连接
conn, err := net.DialTimeout("tcp", net.JoinHostPort(host, port), 5*time.Second)
if err != nil {
	fmt.Println("Error:", err)
	return
}
defer conn.Close()

// 发起HTTP请求
request, err := http.NewRequest("GET", uri, nil)
if err != nil {
	fmt.Println("Error:", err)
	return
}

client := &http.Client{}
response, err := client.Do(request)
if err != nil {
	fmt.Println("Error:", err)
	return
}
defer response.Body.Close()

// 读取和处理响应数据
// 这里可以根据实际需要对响应数据进行处理，比如解析HTML内容等
// ...

}

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

public class Main {

public static void main(String[] args) throws IOException {

// 用户输入的URI

String uri = "https://www.example.com";
    // 创建URL对象
    URL url = new URL(uri);

    // 打开HTTP连接
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();

    // 配置连接属性
    connection.setRequestMethod("GET");
    connection.setConnectTimeout(5000);
    connection.setReadTimeout(5000);

    // 发起请求
    int responseCode = connection.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String line;
        StringBuilder content = new StringBuilder();
        while ((line = reader.readLine()) != null) {
            content.append(line);
        }
        reader.close();

        // 处理响应数据
        // 这里可以根据实际需要对响应数据进行处理，比如解析HTML内容等
        // ...
    } else {
        System.out.println("HTTP Request failed with response code: " + responseCode);
    }
}

}

import socket

import ssl

import requests

def main():

# 用户输入的URI

uri = "https://www.example.com"
# 解析URI获取主机名和路径
parsed_uri = requests.utils.urlparse(uri)
host = parsed_uri.netloc
path = parsed_uri.path if parsed_uri.path else "/"

# 建立TCP连接并进行SSL握手
context = ssl.create_default_context()
with socket.create_connection((host, 443)) as sock:
    with context.wrap_socket(sock, server_hostname=host) as ssock:
        request = f"GET {path} HTTP/1.1\r\nHost: {host}\r\n\r\n"
        ssock.sendall(request.encode())

        response = ssock.recv(4096)
        response = response.decode("utf-8")

        # 处理响应数据
        # 这里可以根据实际需要对响应数据进行处理，比如解析HTML内容等
        # ...

if name == "main":

main()