AytchTeeTeePee.md · 1.4 KiB · Markdown Orginalformat

AytchTeeTeePee

Verrrrry simple HTTP server in Java. Well, not as simple as golang or python, but well, because java.

in python3

bash$ python3 -m http.server 9000

(seriously, will start serving files from CWD)

in golang

package main

import (
    "net/http"
)

// create a handler struct
type HttpHandler struct{}

// implement `ServeHTTP` method on `HttpHandler` struct
func (h HttpHandler) ServeHTTP(res http.ResponseWriter, req *http.Request) {
    // create response binary data
    data := []byte("Hello World!") // slice of bytes
    // write `data` to response
    res.Write(data)
}

func main() {

    // create a new handler
    handler := HttpHandler{}

    // listen and serve
    http.ListenAndServe(":9000", handler)

}

or again in go

package main

import (
	"fmt"
	"io"
	"log"
	"net"
	"net/http"
	"os"
)

func main() {
	http.HandleFunc("/hello", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprint(w, "Hello, playground")
	})

	log.Println("Starting server...")
	l, err := net.Listen("tcp", "localhost:8080")
	if err != nil {
		log.Fatal(err)
	}
	go func() {
		log.Fatal(http.Serve(l, nil))
	}()

	log.Println("Sending request...")
	res, err := http.Get("http://localhost:8080/hello")
	if err != nil {
		log.Fatal(err)
	}

	log.Println("Reading response...")
	if _, err := io.Copy(os.Stdout, res.Body); err != nil {
		log.Fatal(err)
	}
}

httpjava.java · 3.2 KiB · Java Orginalformat

package rocks.zipcode; import java.io.IOException; import java.io.OutputStream; import java.net.InetSocketAddress; import com.sun.net.httpserver.HttpExchange; import com.sun.net.httpserver.HttpHandler; import com.sun.net.httpserver.HttpServer; public class Main { static final int port = 8000; public static void main(String[] args) throws Exception { HttpServer server = HttpServer.create(new InetSocketAddress(Main.port), 0); server.createContext("/", new RootHandler()); server.createContext("/test", new TestHandler()); server.createContext("/foo", new FooHandler()); server.createContext("/bar", new BarHandler()); // server.setExecutor(null); // creates a default executor // server.setExecutor(java.util.concurrent.Executors.newCachedThreadPool()); server.setExecutor(java.util.concurrent.Executors.newFixedThreadPool(5)); server.start(); } static class RootHandler implements HttpHandler { @Override public void handle(HttpExchange t) throws IOException { String response = "Zip Code Rocks!"; t.sendResponseHeaders(200, response.length()); OutputStream os = t.getResponseBody(); os.write(response.getBytes()); os.close(); } } static class TestHandler implements HttpHandler { @Override public void handle(HttpExchange t) throws IOException { String response = "Testing! Testing! Zip Code Rocks!"; t.sendResponseHeaders(200, response.length()); OutputStream os = t.getResponseBody(); os.write(response.getBytes()); os.close(); } } static class FooHandler implements HttpHandler { @Override public void handle(HttpExchange t) throws IOException { String response = "<HTML><BODY><h1>HTML</h1><p>This is a proper paragraph of text.</p></BODY></HTML>"; t.sendResponseHeaders(200, response.length()); OutputStream os = t.getResponseBody(); os.write(response.getBytes()); os.close(); } } static class BarHandler implements HttpHandler { @Override public void handle(HttpExchange t) throws IOException { String response = MakeBody(); t.sendResponseHeaders(200, response.length()); OutputStream os = t.getResponseBody(); os.write(response.getBytes()); os.close(); } } static String MakeBody() { StringBuilder sb = new StringBuilder(); String css = "body { font-family: Arial, sans-serif; line-height: 1.6; color: #222; " + "max-width: 40rem; padding: 2rem; margin: auto; background: #fafafa; }" + "a { color: #2ECC40; } h1, h2, strong { color: #111; }"; sb.append("<HTML>"); sb.append("<style>"); sb.append(css); sb.append("</style>"); sb.append("<BODY><h1>HTML Title</h1>"); sb.append("<p>"); for(int i = 0; i<10; i++) { sb.append("This is a proper paragraph of text. "); } sb.append("</p>"); sb.append("</BODY></HTML>"); return sb.toString(); } }

1	package rocks.zipcode;
2
3	import java.io.IOException;
4	import java.io.OutputStream;
5	import java.net.InetSocketAddress;
6
7	import com.sun.net.httpserver.HttpExchange;
8	import com.sun.net.httpserver.HttpHandler;
9	import com.sun.net.httpserver.HttpServer;
10
11	public class Main {
12	static final int port = 8000;
13	public static void main(String[] args) throws Exception {
14	HttpServer server = HttpServer.create(new InetSocketAddress(Main.port), 0);
15	server.createContext("/", new RootHandler());
16	server.createContext("/test", new TestHandler());
17	server.createContext("/foo", new FooHandler());
18	server.createContext("/bar", new BarHandler());
19	// server.setExecutor(null); // creates a default executor
20	// server.setExecutor(java.util.concurrent.Executors.newCachedThreadPool());
21	server.setExecutor(java.util.concurrent.Executors.newFixedThreadPool(5));
22	server.start();
23	}
24
25	static class RootHandler implements HttpHandler {
26	@Override
27	public void handle(HttpExchange t) throws IOException {
28	String response = "Zip Code Rocks!";
29	t.sendResponseHeaders(200, response.length());
30	OutputStream os = t.getResponseBody();
31	os.write(response.getBytes());
32	os.close();
33	}
34	}
35	static class TestHandler implements HttpHandler {
36	@Override
37	public void handle(HttpExchange t) throws IOException {
38	String response = "Testing! Testing! Zip Code Rocks!";
39	t.sendResponseHeaders(200, response.length());
40	OutputStream os = t.getResponseBody();
41	os.write(response.getBytes());
42	os.close();
43	}
44	}
45	static class FooHandler implements HttpHandler {
46	@Override
47	public void handle(HttpExchange t) throws IOException {
48	String response = "<HTML><BODY><h1>HTML</h1><p>This is a proper paragraph of text.</p></BODY></HTML>";
49	t.sendResponseHeaders(200, response.length());
50	OutputStream os = t.getResponseBody();
51	os.write(response.getBytes());
52	os.close();
53	}
54	}
55
56	static class BarHandler implements HttpHandler {
57	@Override
58	public void handle(HttpExchange t) throws IOException {
59	String response = MakeBody();
60	t.sendResponseHeaders(200, response.length());
61	OutputStream os = t.getResponseBody();
62	os.write(response.getBytes());
63	os.close();
64	}
65	}
66
67	static String MakeBody() {
68	StringBuilder sb = new StringBuilder();
69	String css = "body { font-family: Arial, sans-serif; line-height: 1.6; color: #222; " +
70	"max-width: 40rem; padding: 2rem; margin: auto; background: #fafafa; }" +
71	"a { color: #2ECC40; } h1, h2, strong { color: #111; }";
72
73	sb.append("<HTML>");
74	sb.append("<style>");
75	sb.append(css);
76	sb.append("</style>");
77	sb.append("<BODY><h1>HTML Title</h1>");
78	sb.append("<p>");
79	for(int i = 0; i<10; i++) {
80	sb.append("This is a proper paragraph of text. ");
81	}
82	sb.append("</p>");
83	sb.append("</BODY></HTML>");
84
85	return sb.toString();
86	}
87
88	}
89