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| import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.activation.MimetypesFileTypeMap;
public class HttpServer {
public static void main(String[] args) {
if ( args.length==0 ) {
int port = 8088;
Path path = Paths.get(System.getProperty("user.dir"));
launch(port, path);
}
else if ( args.length==1 ) {
int port = Integer.parseInt(args[0]);
Path path = Paths.get("");
launch(port, path);
}
else {
int port = Integer.parseInt(args[0]);
Path path = Paths.get(args[1]);
if ( Files.isDirectory(path)) {
launch(port, path);
}
else {
System.err.println("Directory not found: " + path);
}
}
}
private static void launch(int port, Path path) {
HttpServer server = new HttpServer(port, path);
Runtime.getRuntime().addShutdownHook(new Thread(()->server.stop()));
try {
server.start();
} catch (IOException e) {
e.printStackTrace();
}
}
private final int httpPort;
private final Path path;
private boolean started;
private ServerThread serverThread;
public HttpServer(int httpPort, Path path) {
this.httpPort=httpPort;
this.path=path;
}
public synchronized void start() throws IOException {
if ( !started ) {
started = true;
serverThread = new ServerThread(httpPort);
serverThread.start();
}
}
public synchronized void stop() {
if ( started ) {
serverThread.stopThread();
started=false;
}
}
private class ServerThread extends Thread {
private final ServerSocket server;
private volatile boolean running;
private ExecutorService executor;
public ServerThread(int port) throws IOException {
super("Http server thread ("+port+")");
this.server = new ServerSocket(port);
}
@Override
public synchronized void start() {
running=true;
try {
super.start();
}
catch(IllegalStateException e) {
running=false;
}
}
@Override
public void run() {
executor = Executors.newSingleThreadExecutor();
while(running) {
try {
Socket accepted = server.accept();
executor.execute(()-> processAccepted(accepted));
} catch (IOException e) {
if ( running ) {
e.printStackTrace();
running=false;
}
}
}
executor.shutdown();
}
private void processAccepted(Socket accepted) {
try(BufferedReader reader = new BufferedReader(new InputStreamReader(accepted.getInputStream()))) {
// simplifié à l'extrême
String line = reader.readLine();
String filename = line.split(" ")[1];
if ( "/".equals(filename) ) {
filename = "/index.html";
}
Path fullpath = path.resolve(filename.substring(1));
if ( Files.exists(fullpath) ) {
String mimetype = MimetypesFileTypeMap.getDefaultFileTypeMap().getContentType(filename);
respond(accepted, mimetype, fullpath, filename);
}
else {
respondError(accepted, "Not found: " + filename);
}
} catch (IOException e) {
e.printStackTrace();
}
}
public void stopThread() {
running=false;
try {
server.close();
} catch (IOException e) {
e.printStackTrace();
}
interrupt();
}
}
private void respond(Socket accepted, String mimetype, Path fullpath, String reason) throws IOException {
try(OutputStream outputStream = accepted.getOutputStream();
PrintStream printStream = new PrintStream(outputStream);) {
printStream.print("HTTP-Version 1.0 Status-Code "+200+" \r\n");
printHeader(printStream,"Content-type", mimeType);
printHeader(printStream,"Content-length", Files.size(fullpath));
printStream.print("\r\n");
try(InputStream inputStream = new BufferedInputStream(Files.newInputStream(fullpath))) {
byte[] buffer = new byte[2048];
for(int read = inputStream.read(buffer); read!=-1; read = inputStream.read(buffer)) {
outputStream.write(buffer, 0, read);
}
}
}
}
private void respondError(Socket accepted, String string) throws IOException {
StringBuilder sb = new StringBuilder();
sb.append("<html><body>");
sb.append(string);
sb.append("</body></html>");
respond(accepted, 500, sb, string);
}
private void respond(Socket accepted, int code, StringBuilder sb, String reason) throws IOException {
try(PrintStream printStream = new PrintStream(accepted.getOutputStream())) {
printStream.print("HTTP-Version 1.0 Status-Code "+code+" "+reason+"\r\n");
printHeader(printStream,"Content-type", "text/html");
printHeader(printStream,"Content-length", sb.length());
printStream.print("\r\n");
printStream.print(sb);
}
}
private void printHeader(PrintStream printStream, String name, Object value) {
printStream.print(name);
printStream.print(": " );
printStream.print(value);
printStream.print("\r\n");
}
} |
