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Http server学习版以及通过代理服务器认证

作者：文章来源：
访问次数：1次加入时间：2005年01月01日

一、Http Server的最简单版本

这个版本不能在简单了，有助于学习

import java.io.*;
import java.net.*;
import java.util.*;
public class httpd extends Thread {
public static final int HTTP_PORT = 8999;
protected ServerSocket listen;
public static void main (String args[]) throws IOException {
System.out.println("Starting Server...");
new httpd();
System.out.println("Http Server Started,OK!");
}
public httpd () {
try {
listen = new ServerSocket(HTTP_PORT);
} catch (IOException e) {
System.out.println("Error in creating server socket");
}
this.start();
}
public void run () {
try {
while (true) {
Socket client = listen.accept();
Connect cc = new Connect(client);
}
} catch (IOException e) {
}
}
}
/**
* socket连接
*/
class Connect extends Thread {
Socket client;
DataInputStream is;
public OutputStream rawOut = null;
public DataOutputStream out = null;
public Connect (Socket s) {
client = s;
try {
is = new DataInputStream(client.getInputStream());
rawOut = client.getOutputStream();
out = new DataOutputStream(rawOut);
} catch (IOException e) {
try {
client.close();
} catch (IOException ex) {
}
}
this.start();
}
public void run () {
try {
String request = is.readUTF();
System.out.println("请求：" + request);
StringTokenizer st = new StringTokenizer(request);
if ((st.countTokens() >= 2) && st.nextToken().equals("GET")) {
if ((request = st.nextToken()).startsWith("/"))
request = request.substring(1).trim();
if (request.endsWith("/") || request.equals(""))
request = request + "index.html";
File f = new File(request.trim());
shipDocument(out, f);
} else {
out.writeBytes("400 Bad Request");
}
client.close();
System.out.println("关闭：" + client.getPort());
} catch (IOException ex1) {
}
}
synchronized public static void shipDocument (DataOutputStream out, File f) {
DataInputStream in = null;
try {
in = new DataInputStream(new FileInputStream(f));
int len = (int) f.length();
byte buf[] = new byte[8192];
System.out.println("web文件名:" + f.getName() + " length:" + f.length());
FileInputStream file = new FileInputStream(f);
out.writeBytes("HTTP/1.1 200 OK ");
out.writeBytes("Content-Length:" + buf.length + " ");
out.writeBytes("Content-Type:texthtml ");
for (int i = 0; i < len; i += 8192) {
int bytesRead = file.read(buf);
out.write(buf, 0, bytesRead);
}
out.writeBytes(" ");
out.flush();
in.close();
file.close();
} catch (FileNotFoundException ex) {
try {
out.writeBytes("404 not found!");
} catch (IOException e) {
}
} catch (IOException e) {
System.out.println("err");
}
}
}

二、代理服务器认证的实现
扩展JR开源项目的网络蚂蚁，通过代理服务器，弹出认证窗口。

import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class URLPassword extends Frame {
private TextField tf = new TextField();
private TextArea ta = new TextArea();
public URLPassword () {
super("URL Password");
// 安装 Authenticator
MyAuthenticator myAuth = new MyAuthenticator();
Authenticator.setDefault(myAuth);
// 设置屏幕
add(tf, BorderLayout.NORTH);
ta.setEditable(false);
add(ta, BorderLayout.CENTER);
tf.addActionListener(new ActionListener() {
public void actionPerformed (ActionEvent e) {
String s = tf.getText();
if (s.length() != 0)
ta.setText(fetchURL(s));
}
});
addWindowListener(new WindowAdapter() {
public void windowClosing (WindowEvent e) {
dispose();
System.exit(0);
}
});
}
private String fetchURL (String urlString) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
try {
URL url = new URL(urlString);
InputStream content = (InputStream) url.getContent();
BufferedReader in =
new BufferedReader(new InputStreamReader(content));
String line;
while ((line = in.readLine()) != null) {
pw.println(line);
}
} catch (MalformedURLException e) {
pw.println("Invalid URL");
} catch (IOException e) {
pw.println("Error reading URL");
}
return sw.toString();
}
public static void main (String args[]) {
Properties systemSettings = System.getProperties();
systemSettings.put("proxySet", "true");
systemSettings.put("proxyHost", "202.112.209.106");
systemSettings.put("proxyPort", "8888");
System.setProperties(systemSettings);
Frame f = new URLPassword();
f.setSize(300, 300);
f.setVisible(true);
}
class MyAuthenticator extends Authenticator {
protected PasswordAuthentication getPasswordAuthentication () {
final Dialog jd = new Dialog(URLPassword.this, "Enter password", true);
jd.setLayout(new GridLayout(0, 1));
Label jl = new Label(getRequestingPrompt());
jd.add(jl);
TextField username = new TextField();
username.setBackground(Color.lightGray);
jd.add(username);
TextField password = new TextField();
password.setEchoChar('*');
password.setBackground(Color.lightGray);
jd.add(password);
Button jb = new Button("OK");
jd.add(jb);
jb.addActionListener(new ActionListener() {
public void actionPerformed (ActionEvent e) {
jd.dispose();
}
});
jd.pack();
jd.setVisible(true);
return new PasswordAuthentication(username.getText(), password.getText().toCharArray());
}
}
}