Hello DIY Tomcat from a.html

package cn.how2j.diytomcat.util;

import cn.hutool.system.SystemUtil;

import java.io.File;

public class Constant {
    public final static String response_head_202 =
            "HTTP/1.1 200 OK\r\n" +
            "Content-Type: {}\r\n\r\n";

    public final static File webappsFolder = new File(SystemUtil.get("user.dir"),"webapps");
    public final static File rootFolder = new File(webappsFolder,"ROOT");

}

package cn.how2j.diytomcat;

import cn.how2j.diytomcat.http.Request;
import cn.how2j.diytomcat.http.Response;
import cn.how2j.diytomcat.util.Constant;
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.NetUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.core.util.ZipUtil;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Bootstrap {

    public static void main(String[] args) {

        try {
            int port = 18080;

            if(!NetUtil.isUsableLocalPort(port)) {
                System.out.println(port +" 端口已经被占用了，排查并关闭本端口的办法请用：\r\nhttps://how2j.cn/k/tomcat/tomcat-portfix/545.html");
                return;
            }
            ServerSocket ss = new ServerSocket(port);

            while(true) {
                Socket s =  ss.accept();
                Request request = new Request(s);
                System.out.println("浏览器的输入信息： \r\n" + request.getRequestString());
                System.out.println("uri:" + request.getUri());

                Response response = new Response();

                String uri = request.getUri();
                if(null==uri)
                    continue;
                System.out.println(uri);
                if("/".equals(uri)){
                    String html = "Hello DIY Tomcat from how2j.cn";
                    response.getWriter().println(html);
                }
                else{
                    String fileName = StrUtil.removePrefix(uri, "/");
                    File file = FileUtil.file(Constant.rootFolder,fileName);
                    if(file.exists()){
                        String fileContent = FileUtil.readUtf8String(file);
                        response.getWriter().println(fileContent);
                    }
                    else{
                        response.getWriter().println("File Not Found");
                    }
                }
                handle200(s, response);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    private static void handle200(Socket s, Response response) throws IOException {
        String contentType = response.getContentType();
        String headText = Constant.response_head_202;
        headText = StrUtil.format(headText, contentType);
        byte[] head = headText.getBytes();

        byte[] body = response.getBody();

        byte[] responseBytes = new byte[head.length + body.length];
        ArrayUtil.copy(head, 0, responseBytes, 0, head.length);
        ArrayUtil.copy(body, 0, responseBytes, head.length, body.length);

        OutputStream os = s.getOutputStream();
        os.write(responseBytes);
        s.close();
    }
}

package cn.how2j.diytomcat.test;

import cn.how2j.diytomcat.util.MiniBrowser;
import cn.hutool.core.util.NetUtil;
import cn.hutool.core.util.StrUtil;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
 
public class TestTomcat {
    private static int port = 18080;
    private static String ip = "127.0.0.1";
    @BeforeClass
    public static void beforeClass() {
        //所有测试开始前看diy tomcat 是否已经启动了
        if(NetUtil.isUsableLocalPort(port)) {
            System.err.println("请先启动 位于端口: " +port+ " 的diy tomcat，否则无法进行单元测试");
            System.exit(1);
        }
        else {
            System.out.println("检测到 diy tomcat已经启动，开始进行单元测试");
        }
    }

    @Test
    public void testHelloTomcat() {
        String html = getContentString("/");
        Assert.assertEquals(html,"Hello DIY Tomcat from how2j.cn");
    }

    @Test
    public void testaHtml() {
        String html = getContentString("/a.html");
        Assert.assertEquals(html,"Hello DIY Tomcat from a.html");
    }
 
    private String getContentString(String uri) {
        String url = StrUtil.format("http://{}:{}{}", ip,port,uri);
        String content = MiniBrowser.getContentString(url);
        return content;
    }
}