PostQuerypublic class PostQuery extends Applet implements ActionListener| Simple demonstration of posting to a query form cgi on a Web server. |
| Fields Summary |
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| protected Button | goButton | | protected URLConnection | conn | | protected PrintWriter | ps | | protected BufferedReader | is |
| Constructors Summary |
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public PostQuery()
add(goButton = new Button("Go for it!"));
goButton.addActionListener(this);
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| Methods Summary |
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| public void | actionPerformed(java.awt.event.ActionEvent evt)
try {
URL myNewURL;
String serverURL = getParameter("serverURL");
if (serverURL == null)
serverURL = "http://server/cgi-bin/test-cgi.pl";
showStatus("Building URL " + serverURL);
myNewURL = new URL(serverURL);
showStatus("Connecting to " + myNewURL);
// Try to open the connection...
conn = myNewURL.openConnection();
showStatus("Connected! to " + myNewURL);
conn.setDoOutput(true);
conn.setUseCaches(false); // ensure response always from server
ps = new PrintWriter(
new OutputStreamWriter(conn.getOutputStream()));
showStatus("Sending...");
ps.println(URLEncoder.encode("key") + "=" +
URLEncoder.encode("some value"));
ps.println(URLEncoder.encode("key 2") + "=" +
URLEncoder.encode("another value"));
ps.close();
conn.setDoInput(true);
is = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
showStatus("Receiving...");
String newReq;
while ((newReq = is.readLine()) != null) {
System.out.println("Response = " + newReq);
}
showStatus("Look for results in the console window");
is.close();
} catch (Exception err) {
showStatus("Error, look in Java Console for details!");
System.err.println("Error!\n" + err);
}
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