java用socket来做http服务器（2）

╰+哭是因爲堅強的太久メ 2024-02-19 16:37 53阅读 0赞

## 服务端代码： ##

import java.io.BufferedReader;
    import java.io.BufferedWriter;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.OutputStream;
    import java.io.OutputStreamWriter;
    import java.io.PrintWriter;
    import java.net.ServerSocket;
    import java.net.Socket;
    
    public class HTTPServer {
    
    	public static void main(String[] args) {
    		try {
    			System.out.println("服务器开启");
    			ServerSocket ss = new ServerSocket(8889);
    			while (true) {
    				Socket socket = ss.accept();
    		        System.out.println("接收到一个请求，请求地址:"+  
    		                socket.getInetAddress()+":"+socket.getPort()); 
    				BufferedReader bd = new BufferedReader(new InputStreamReader(
    						socket.getInputStream(), "UTF-8"));
    
    				/**
    				 * 接受HTTP请求
    				 */
    				String requestHeader;
    				int contentLength = 0;
    				while ((requestHeader = bd.readLine()) != null
    						&& !requestHeader.isEmpty()) {
    					System.out.println("报文头数据:" + requestHeader);
    					if (requestHeader.startsWith("POST")) {
    						System.out.println("该请求为POST请求");
    					}
    					if (requestHeader.startsWith("GET")) {
    						System.out.println("该请求为GET请求");
    					}
    					if (requestHeader.startsWith("Content-Length")) {//只有Post请求会有这个信息
    						int begin = requestHeader.indexOf("Content-Lengh:")
    								+ "Content-Length:".length();//判断报文头参数Content-Length的起始位置
    						String postParamterLength = requestHeader.substring(
    								begin + 1).trim();//获取报文头参数信息的长度
    						contentLength = Integer.parseInt(postParamterLength);
    						System.out.println("POST参数长度是："
    								+ Integer.parseInt(postParamterLength));
    					}
    				}
    
    				StringBuffer sb = new StringBuffer();
    				if (contentLength > 0) {//如果是Post请求，打印客户端数据
    					for (int i = 0; i < contentLength; i++) {
    						sb.append((char) bd.read());
    					}
    					System.out.println("http服务端接收客户端数据：" + sb.toString());
    				}
    
    				System.out.println("发送回执");
    				// 发送回执
    				OutputStream out = socket.getOutputStream();
    				StringBuffer pw = new StringBuffer();
    				pw.append("HTTP/1.1 200 OK" + "\r\n");
    				pw.append("Content-type:text/html" + "\r\n");
    				pw.append("\r\n");
    				// 返回客户端的数据
    				String resJson = "server return value";
    				System.out.println("http服务器返回客户端数据：" + resJson);
    				pw.append(resJson);
    				String ResMsg = pw.toString();
    				out.write(ResMsg.getBytes("GBK"));
    
    				socket.close();
    			}
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    	}
    }

## 测试： ##

可以写一个http客户端代码，也可以直接用浏览器访问，地址：[http://localhost:8889/XXX][http_localhost_8889_XXX]

## 测试结果： ##

#### 客户端代码访问结果： ####

服务器开启
    接收到一个请求，请求地址:/127.0.0.1:58122
    报文头数据:POST /SSM_HTTPS HTTP/1.1
    该请求为POST请求
    报文头数据:Charset: UTF-8
    报文头数据:Content-Type: application/json; charset=UTF-8
    报文头数据:accept: application/json
    报文头数据:Cache-Control: no-cache
    报文头数据:Pragma: no-cache
    报文头数据:User-Agent: Java/1.6.0_45
    报文头数据:Host: localhost:8889
    报文头数据:Connection: keep-alive
    报文头数据:Content-Length: 16
    POST参数长度是：16
    http服务端接收客户端数据：1234567890098765
    发送回执
    http服务器返回客户端数据：server return value

#### 浏览器访问结果： ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc_size_16_color_FFFFFF_t_70][]

————————————————————————————————————————————————————————

接收到一个请求，请求地址:/0:0:0:0:0:0:0:1:58330
    报文头数据:GET /XXX HTTP/1.1
    该请求为GET请求
    报文头数据:Accept: image/gif, image/jpeg, image/pjpeg, application/x-ms-application, application/xaml+xml, application/x-ms-xbap, */*
    报文头数据:Accept-Language: zh-CN
    报文头数据:User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729)
    报文头数据:Accept-Encoding: gzip, deflate
    报文头数据:Host: localhost:8889
    报文头数据:Connection: Keep-Alive
    发送回执
    http服务器返回客户端数据：server return value

[http_localhost_8889_XXX]: http://localhost:8889/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0RHSDI0MzAyODQ4MTc_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/e0d705bfe1e242709f94857c29b3a4f9.png