localhostに接続しようとしたときに、ブラウザーの要求を表示するマルチスレッドサーバープログラムを作成しています。
WindowsではIE9のみが期待どおりに機能しますが、Firefox 19、Chrome、Operaは機能しません。私のプログラムの応答を待つためにただそこに座っているだけです。
私が逃したものは？
import java.io.*;
import java.net.*;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.logging.Level;
import java.util.logging.Logger;
public class HTTPEchoServer {
private static final String serverName = "HTTPEchoServer";
private static final int port = 80;
private static final String CRLF = "\r\n";
private static final Logger logger = Logger.getLogger(serverName);
private static void printHeader(PrintWriter out) {
out.println("HTTP/1.0 200 OK\r\n" + "Server: " + serverName + CRLF
+ "Content-Type: text/html" + CRLF + CRLF
+ "<!DOCTYPE HTML PUBLIC "
+ "\"-//W3C//DTD HTML 4.0 Transitional//EN\">\n"
+ "<HTML>\n"
+ "<HEAD>\n"
+ " <TITLE>" + "HTTP Echo Server Result</TITLE>\n"
+ "</HEAD>\n"
+ "<H1>HTML Received from HTTP Echo Server</H1>\n"
+ "<B>Here is the request sent by your browser:</B>\n"
+ "<PRE>");
}
private static void printTrailer(PrintWriter out) {
out.println("</PRE>\n" + "</BODY>\n" + "</HTML>\n");
}
static class ClientHandler extends Thread {
Socket socket = null;
public ClientHandler(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
logger.log(Level.INFO, "Accepted client {0}:{1}",
new Object[]{socket.getInetAddress(), socket.getPort()});
try {
InputStream is = socket.getInputStream();
OutputStream os = socket.getOutputStream();
try (PrintWriter writer = new PrintWriter(os, true)) {
synchronized (this) {
printHeader(writer);
writer.flush();
BufferedReader reader = new BufferedReader
(new InputStreamReader(is));
String line;
while ((line = reader.readLine()) != null) {
writer.println(line);
writer.flush();
}
printTrailer(writer);
writer.flush();
writer.close();
}
}
socket.close();
} catch (IOException ex) {
logger.log(Level.SEVERE, null, ex);
}
logger.log(Level.INFO, "Disconnected client {0}:{1}",
new Object[]{socket.getInetAddress(), socket.getPort()});
}
}
public static void main(String[] args) {
try {
ServerSocket server = new ServerSocket(port);
logger.log(Level.INFO, "Server started, listening at port {0} ...", port);
ExecutorService executor = Executors.newCachedThreadPool();
while (true) {
Socket socket = server.accept();
ClientHandler handler = new ClientHandler(socket);
executor.execute(handler);
}
} catch (IOException ex) {
logger.log(Level.SEVERE, null, ex);
}
}
}
また、ポートを8080に変更しない限り、このプログラムをOSXで実行できないことがわかりました。OSX10.8.2コンピューターでファイアウォールを既に無効にしています。私が得るエラーは次のとおりです。
<pre>
java.net.BindException: Permission denied
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:376)
at java.net.ServerSocket.bind(ServerSocket.java:376)
at java.net.ServerSocket.<init>(ServerSocket.java:237)
at java.net.ServerSocket.<init>(ServerSocket.java:128)
at HTTPEcho.HTTPEchoServer.main(HTTPEchoServer.java:80)
</pre>