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SimpleHTTPServer.java Brut
1package rocks.zipcode;
2
3import java.io.IOException;
4import java.net.ServerSocket;
5import java.net.Socket;
6import java.util.Date;
7
8
9// Show how Sockets work. Lower level than Main class.
10class SimpleHTTPServer {
11 public static void main(String args[]) throws IOException {
12 ServerSocket server = new ServerSocket(8001);
13 System.out.println("Listening for connection on port 8080 ....");
14 while (true) {
15 try (Socket socket = server.accept()) {
16 Date today = new Date();
17 String httpResponse = "HTTP/1.1 200 OK\r\n\r\n" + today;
18 socket.getOutputStream().write(httpResponse.getBytes("UTF-8"));
19 }
20 }
21 }
22}
23
WebClient.java Brut
1package rocks.zipcode;
2
3import java.io.IOException;
4import java.io.InputStream;
5import java.net.URL;
6import java.net.URLConnection;
7import java.util.Scanner;
8
9public class WebClient {
10 public static void main(String[] args) throws IOException {
11 String url = "http://localhost:8000";
12 if (args.length == 0) {
13 Scanner scanner = new Scanner(System.in);
14 System.out.print("Enter a URL: ");
15 url = scanner.nextLine();
16 } else {
17 url = args[0];
18 }
19 try {
20 URLConnection connection = new URL(url).openConnection();
21 InputStream response = connection.getInputStream();
22 Scanner scanner = new Scanner(response);
23 String responseBody = scanner.useDelimiter("\\A").next();
24 System.out.println(responseBody);
25 } catch (IOException e) {
26 System.out.println("Error fetching URL: " + e.getMessage());
27 }
28 }
29}
ZipWebServer.java Brut
1package rocks.zipcode;
2
3import java.io.IOException;
4import java.io.OutputStream;
5import java.net.InetSocketAddress;
6
7import com.sun.net.httpserver.HttpExchange;
8import com.sun.net.httpserver.HttpHandler;
9import com.sun.net.httpserver.HttpServer;
10
11public class ZipWebServer {
12 static final int port = 8000;
13
14 public static void main(String[] args) throws Exception {
15 HttpServer server = HttpServer.create(new InetSocketAddress(ZipWebServer.port), 0);
16 server.createContext("/", new RootHandler());
17 server.createContext("/test", new TestHandler());
18 server.createContext("/foo", new FooHandler());
19 server.createContext("/bar", new BarHandler());
20 // server.setExecutor(null); // creates a default executor
21 // server.setExecutor(java.util.concurrent.Executors.newCachedThreadPool());
22 server.setExecutor(java.util.concurrent.Executors.newFixedThreadPool(5));
23 server.start();
24 }
25
26 static class RootHandler implements HttpHandler {
27 @Override
28 public void handle(HttpExchange t) throws IOException {
29 if (t.getRequestMethod().equals("GET") ) {
30 String response = "Zip Code Rocks!";
31 t.sendResponseHeaders(200, response.length());
32 OutputStream os = t.getResponseBody();
33 os.write(response.getBytes());
34 os.close();
35 } else {
36 String response = "No GET!";
37 t.sendResponseHeaders(404, response.length());
38 OutputStream os = t.getResponseBody();
39 os.write(response.getBytes());
40 os.close();
41 }
42 }
43 }
44 static class TestHandler implements HttpHandler {
45 @Override
46 public void handle(HttpExchange t) throws IOException {
47 String response = "Testing! Testing! Zip Code Rocks!";
48 t.sendResponseHeaders(200, response.length());
49 OutputStream os = t.getResponseBody();
50 os.write(response.getBytes());
51 os.close();
52 }
53 }
54 static class FooHandler implements HttpHandler {
55 @Override
56 public void handle(HttpExchange t) throws IOException {
57 String response = "<HTML><BODY><h1>HTML</h1><p>This is a proper paragraph of text.</p></BODY></HTML>";
58 t.sendResponseHeaders(200, response.length());
59 OutputStream os = t.getResponseBody();
60 os.write(response.getBytes());
61 os.close();
62 }
63 }
64
65 static class BarHandler implements HttpHandler {
66 @Override
67 public void handle(HttpExchange t) throws IOException {
68 String response = MakeBody();
69 t.sendResponseHeaders(200, response.length());
70 OutputStream os = t.getResponseBody();
71 os.write(response.getBytes());
72 os.close();
73 }
74 }
75
76 static String MakeBody() {
77 StringBuilder sb = new StringBuilder();
78 String css = "body { font-family: Arial, sans-serif; line-height: 1.6; color: #222; " +
79 "max-width: 40rem; padding: 2rem; margin: auto; background: #fafafa; }" +
80 "a { color: #2ECC40; } h1, h2, strong { color: #111; }";
81
82 sb.append("<HTML>");
83 sb.append("<style>");
84 sb.append(css);
85 sb.append("</style>");
86 sb.append("<BODY><h1>Level One Header</h1>");
87 sb.append("<p>");
88 for(int i = 0; i<10; i++) {
89 sb.append("This is a proper paragraph of text. ");
90 }
91 sb.append("</p>");
92 sb.append("<h2>Header Level 2</h2>");
93 sb.append("<p><em>");
94 for(int i = 0; i<2; i++) {
95 sb.append("How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth? We know that he did not come through the door, the window, or the chimney. We also know that he could not have been concealed in the room, as there is no concealment possible. When, then, did he come?. <br/> ");
96 }
97 sb.append("</em></p>");
98
99 // do a bunch SQL queries here
100 // sb.append("<p>SELECT * FROM users WHERE username = 'admin';</p>");
101
102 sb.append("<h3>Header Level 3</h3>");
103 sb.append("<p>");
104 for(int i = 0; i<5; i++) {
105 sb.append("Experience is the teacher of all things.\n");
106 }
107 sb.append("</p>");
108
109 sb.append("</BODY></HTML>");
110
111 return sb.toString();
112 }
113
114}
115

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