模拟Tomcat服区器(简易版)
模拟Tomcat服区器
原理分析
Get方式
请求行
GET /index.html HTTP/1.1
请求头 key: value
Host: localhost:801 Connection: keep-alive Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3 Accept-Encoding: gzip, deflate, br Accept-Language: zh-CN,zh;q=0.9 Cookie: Idea-905e6cbc=709bfabc-875e-4542-8f0f-5dd05f46e6a4
post方式
请求行 状态码 200 ok 400客户端
请求头
Context—length
空行
请求体
响应之前需要把格式写到网络里面
例如文本类型 编码
响应行 协议版本 状态码 状态英文 要换行
键值对形式存（响应类型context-type）
空行
响应体
Application类
public class Application {
public static void main(String[] args) throws IOException {
//创建服务端
ServerSocket serverSocket = new ServerSocket(9999);
ExecutorService Threadpool = Executors.newCachedThreadPool();
Request request=null;
while (true){
Socket socket = serverSocket.accept();
//把socket转为对象
request = socketto.gterequse(socket);
String filename1 =request.getRequestresourse();///1.txt
Response response = new Response();
String filename=filename1.substring(1);
System.out.println("filename"+filename+"&&&&&&&&");
File file = new File(filename);
if (file.exists()){
response.setStateCode(StateCode.OK);
}else{
response.setStateCode(StateCode.Not_found);
}
String suff=filename.substring(filename.lastIndexOf(".")+1);
response.getMap().put("ContentType: ", FileTypeUtil.map.get(suff));
// System.out.println(response.toString());
// System.out.println(request.toString());
// System.out.println("--------"+suff);
//多线程处理对象
poolAction.getThread(Threadpool,response,socket,filename);
}
}
}
Request
@Data
public class Request implements Serializable {
//设置请求方式
private String requestMethod;
//获取请求的资源
private String requestresourse;
//存放请求的电脑的信息
}
Response
@Data
public class Response implements Serializable{
//响应头
private String argement="HTTP/1.1";
//状态码
private StateCode stateCode;
//响应体的封装
private Map<String,String> map = new HashMap<>();
}
FileTypeUtil
public class FileTypeUtil {
public static Map<String,String> map = null;
static {
map=new HashMap<>();
map.put("txt","text/html,charset =utf-8" );
map.put("html","text/html,charset =utf-8" );
map.put("jpg","image/jpeg,charset =utf-8" );
map.put("pdf","application/pdf,charset =utf-8" );
map.put("png","image/png,charset =utf-8" );
}
}
PoolAction
public class poolAction {
public static void getThread(ExecutorService Threadpool, Response response, Socket socket,String filename){
Threadpool.execute(()->{
try {
StringBuffer stringBuffer=null;
String contexttype=null;
BufferedOutputStream bf = new BufferedOutputStream(socket.getOutputStream());
//System.out.println(filename);
bf.write((response.getArgement()+" ").getBytes());
bf.write((StateCode.OK.getId()+" "+response.getStateCode().toString()+"\r\n").getBytes());
Set<Map.Entry<String, String>> entries = response.getMap().entrySet();
for (Map.Entry e:entries
) {
contexttype= e.getValue()+" "+e.getValue()+"\r\n";
}
bf.write(contexttype.getBytes());
bf.write("\r\n".getBytes() );
FileInputStream fileInputStream = new FileInputStream(filename);
byte [] bytes = new byte[1024];
int hasread=-1;
while ((hasread=fileInputStream.read(bytes))!=-1){
bf.write(bytes,0 ,hasread );
}
fileInputStream.close();
bf.flush();
fileInputStream.close();
socket.shutdownOutput();
} catch (IOException e) {
e.printStackTrace();
}
});
}
}
socketto
public class socketto {
public static Request gterequse(Socket socket) throws IOException {
Request request = new Request();
BufferedReader bReader= new BufferedReader(new InputStreamReader(socket.getInputStream()));
String[] split = bReader.readLine().split(" ");
// System.out.println(Arrays.toString(split));
request.setRequestMethod(split[0]);
request.setRequestresourse(split[1]);
// System.out.println(request.getRequestresourse());
// System.out.println(request.getRequestMethod());
// String hasread =null;
// while((hasread=bReader.readLine())!=null) {
// String[] split1 = hasread.split(": ");
// request.getRequestMap().put(split1[0],split1[1]);
// System.out.println("----------------");
// }
// socket.shutdownInput();
return request;
}
}
StateCode
public enum StateCode {
OK(200, "OK"), Not_found(404, "not_found");
private int id;
private String msg;
private StateCode(int id, String state) {
this.id = id;
this.msg = state;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}
