// // URLtimestable class // part of the set of documents known as Java no sugar. // Copyright (c) 1996 Sunil Gupta, sunil@magnetic.demon.co.uk // placed into the public domain by the author // import java.awt.*; import java.io.*; import java.net.*; import java.applet.*; import java.util.*; import UrlPostConnection; import Document; public class URLtimestable extends Applet { //******************************************************************* // instance variables //******************************************************************* static final String HOSTPARAM = "HOSTNAME"; static final String PORTPARAM = "PORTNAME"; TextArea textarea; TextField txt_number, txt_count; Button btn_doit; //******************************************************************* // applet methods //******************************************************************* public void init() { GridBagConstraints c; GridBagLayout layout; Label label; //--------BUILD THE USER INTERFACE------------------------- layout = new GridBagLayout(); this.setLayout( layout ); //--------------------------------------------------------- label = new Label("Number"); c = new GridBagConstraints(); c.gridx = 0; c.gridy = 0; c.gridwidth=1; c.gridheight=1; c.fill = GridBagConstraints.HORIZONTAL; layout.setConstraints(label,c); this.add(label); label = new Label("Count"); c = new GridBagConstraints(); c.gridx = 0; c.gridy = 1; c.gridwidth=1; c.gridheight=1; c.fill = GridBagConstraints.HORIZONTAL; layout.setConstraints(label,c); this.add(label); //--------------------------------------------------------- txt_number = new TextField(); c = new GridBagConstraints(); c.gridx = 1; c.gridy = 0; c.gridwidth=1; c.gridheight=1; c.fill = GridBagConstraints.HORIZONTAL; layout.setConstraints(txt_number,c); this.add(txt_number); txt_count = new TextField(); c = new GridBagConstraints(); c.gridx = 1; c.gridy = 1; c.gridwidth=1; c.gridheight=1; c.fill = GridBagConstraints.HORIZONTAL; layout.setConstraints(txt_count,c); this.add(txt_count); //--------------------------------------------------------- textarea = new TextArea(); c = new GridBagConstraints(); c.gridx = 0; c.gridy = 2; c.gridwidth=2; c.gridheight=2; c.fill = GridBagConstraints.BOTH; layout.setConstraints(textarea,c); this.add(textarea); //------------------------add button-------------------- btn_doit = new Button("Do it"); c = new GridBagConstraints(); c.gridx = 2; c.gridy = 0; c.gridwidth=1; c.gridheight=1; c.fill = GridBagConstraints.HORIZONTAL; layout.setConstraints(btn_doit,c); this.add(btn_doit); } public boolean action(Event event, Object arg) { if (event.target == btn_doit) { do_times_url(); return true; } return (false) ; } // // date is a safe choice since most httpd's implement this // private void do_times_url() throws NumberFormatException { URL applet_url; String protocol, data_line; String num,count; DataInputStream in_stream; PrintStream out_stream; UrlPostConnection connection; String script = "/cgi-bin/timestable.pl"; String hostname, port_string; int port; Document document; Enumeration result_data; //------------------------------------------------------------------ // clear out any text // textarea.setText(""); //------------------------------------------------------------------ // make sure applet is running from httpd // applet_url = this.getDocumentBase(); protocol = applet_url.getProtocol(); if ( ! protocol.equals("http") ) { textarea.appendText( "This applet isnt being run from a server\n" + "and will not work unless you switch off the security\n" + "restrictions on your browser\n" ); hostname = getParameter(HOSTPARAM); if (hostname == null) { textarea.appendText("You need to supply a hostname in the " + HOSTPARAM + " paramater\n"); return; } port_string = getParameter(PORTPARAM); if ( port_string == null) port = 80; else port = Integer.parseInt(port_string); } else { textarea.appendText("Applet is on a server\n"); hostname = applet_url.getHost(); port = applet_url.getPort(); } //------------------------------------------------------------------ // BUILD URL netscape doesnt support POST so have to use a custom class. // connection = new UrlPostConnection(hostname, port, script); connection.setProperty("number", txt_number.getText() ); connection.setProperty("count", txt_count.getText() ); textarea.appendText( "Attempting to use URL " + connection.toString()+ "\n"); try { document = connection.sendData(); } catch (IOException e) { textarea.appendText("unable to connect to \n " + e +"\n"); return; } //------------------------------------------------------------------ // All was well if this point was reached, display string data" // result_data = document.body(); while (result_data.hasMoreElements()) { data_line = (String) result_data.nextElement(); textarea.appendText(data_line +"\n"); } } }
file: /Techref/language/java/nosugar/comms/code/URLtimestable.java, 5KB, , updated: 1996/10/10 11:08, local time: 2024/8/26 12:22,
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