回显主页和favicon
找一个图片
写index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>主页</title>
</head>
<body>
<h1>主页</h1>
<hr>
</body>
</html>
写一个Request类
package web;
/**
* 请求类
*/
public class Request {
private String method;
private String uri;
public String getMethod() {
return method;
}
public void setMethod(String method) {
this.method = method;
}
public String getUri() {
return uri;
}
public void setUri(String uri) {
this.uri = uri;
}
}
package web;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class MyHttpServer {
private static int count = 1;
private static char arr[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
public static void main(String[] args) throws IOException {
byte b = 0x3f;
byte2(b);
ServerSocket server = new ServerSocket(8080);
System.out.println("服务器已经启动，监听端口在8080...");
while (true){
Socket socket = server.accept();
InputStream is = socket.getInputStream();
OutputStream os = socket.getOutputStream();
byte[] buf = new byte[1024*1024];
new Thread(new Runnable() {
@Override
public void run() {
int len = 0;
try {
len = is.read(buf);
if (len == -1) return;
System.out.println("读到的字节数量是："+len);
String hexMsg = bytes2(buf, len);
System.out.println(hexMsg);
String s = new String(buf,0,len);
System.out.println(s);
Request request = parseRequest(s);
// HTTP1.1协议 状态码200 正确 回车换行
String line1 = "HTTP/1.1 200 OK\r\n";
// 内容的类型是普通文本，回车换行
String line2 = "Content-Type:text/plain\r\n";
// 回车换行
final String line3 = "\r\n";
String file = null;
if (request.getUri().equals("/") || request.getUri().equals("/index.html")){
line2 = "Content-Type:text/html\r\n";
file = "index.html";
}else if (request.getUri().equals("/favicon.ico")){
line2 = "Content-Type: image/x-icon\r\n";
file = "favicon.ico";
}
// 固定的响应三行
os.write(line1.getBytes());
os.write(line2.getBytes());
os.write(line3.getBytes());
// 如果file不为空，说明需要回文件给浏览器
if (file != null){
FileInputStream fis = new FileInputStream(file);
while ((len=fis.read(buf)) !=-1){
os.write(buf,0,len);
}
}else {
// 返回浏览器的文本内容
os.write((""+count).getBytes());
count++;
}
// 主动刷新一次
os.flush();
} catch (IOException e) {
e.printStackTrace();
}finally {
if (socket != null){
try {
// 关闭资源
socket.close();
}catch (IOException e){
e.printStackTrace();
}
}
}
}
}).start();
}
}
/**
* 解析封装为Request对象
* @param
* @return
*/
private static Request parseRequest(String s){
Request req = new Request();
String[] split = s.split("\r\n");
String[] spl = split[0].split(" ");
req.setMethod(spl[0]);
req.setUri(spl[1]);
return req;
}
private static String bytes2(byte[] buf,int len){
StringBuffer sBuffer = new StringBuffer();
StringBuffer sb1 = new StringBuffer();
StringBuffer sb2 = new StringBuffer();
int cnt = 0;
for(int i=0;i<len;i++){
sb1.append(byte2(buf[i]) + " ");
if (buf[i] >= 0x20 && buf[i] <= 0x7e){
sb2.append((char)buf[i]);
}else {
sb2.append(".");
}
cnt++;
if (cnt % 8 == 0) sb1.append(" ");
if (cnt % 16 == 0) {
sBuffer.append(sb1).append(sb2).append("\r\n");
sb1 = new StringBuffer();
sb2 = new StringBuffer();
cnt = 0;
}
}
if (cnt != 0) sBuffer.append(sb1).append(" ").append(sb2).append("\r\n");
return sBuffer.toString();
}
private static String byte2(byte bt){
int lo = bt & 0b00001111;
int hi = (bt & 0b11110000) >> 4;//位移运算符 移四位，得到四个1
char clo = arr[lo];
char chi = arr[hi];
return chi+ "" + clo;
}
}
标签：回显,String,主页,os,len,favicon,new,buf,public From： https://www.cnblogs.com/yu3304/p/17276211.html