gb2
/* gb2.java
*
* Version 2.0
* Copyright(C) 1996 by Bill Giel
*
* E-mail: rvdi@usa.nai.net
* WWW: http://www.nai.net/~rvdi/home.htm
*
***************************************************************************
* Abstract
* --------
* A simple SMTP mail sender with a guest book interface.
*
* Version 2.0a adds preferredSize and minimumSize Methods to logoPanel class
*
***************************************************************************
* THE AUTHOR MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY
* OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. THE AUTHOR SHALL NOT BE LIABLE
* FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
***************************************************************************/
/* Documentation addendum from Version 1
*
* NOTE: TO RECEIVE GUEST BOOK ENTRIES, YOU MUST SPECIFY YOUR E-MAIL
* ADDRESS AS THE 'RECEIVER' PARAMETER IN THE APPLETS HTML TAG.
*
* YOUR LOCAL HOST MUST SUPPORT SMTP MESSAGES ON PORT 25
*
*
* ADDENDUM TO DOCUMENTATION (7 Feb 1996) - Some of you have been
* unable to get your guestbook applets to work on your own home
* pages, while others have been successful.
*
* If you have a chance to study the code of the mailMessage method
* of the 'send' class, you'll see that guestbook first establishes
* a socket with the 'mailhost' at port 25, in accordance with
* TCP/SMTP specs (see RFC 821).
*
* Then, guestbook waits for the 220 'service ready' message transmission
* over the socket. After successfully receiving 220, it then obtains the
* 'helohost' domain name from the server and transmits the HELO <domain>
* command over the socket. If accepted, the receiver-SMTP returns a 250
* (OK) reply.
*
* Following that , guestbook sends MAIL FROM: <sender>, then RECPT TO:
* <receiver>, expecting 250 replies after each. Note that in guestbook,
* the sender and receiver addresses are the same.
*
* It then sends the DATA command, and expects 354 intermediate reply from
* the SMTP server. All that follows DATA is the standard text message in
* the format defined in RFC 822, with a standard 'Subject:' field, followed
* by a blank line. What follows the blank line is the actual text (your guest's
* optional name, optional email address and comments or suggestions.)
*
* After the message is transmitted, guestbook transmits a single '\r\n . \r\n',
* signifying end of message, waits for a 250 (OK) reply, then transmits a final
* QUIT command, and anticipates receipt of 221, indicating the server is closing
* the SMTP channel.
*
* The mailMessage method then closes the socket before returning true, only if
* all of the above were successful. mailMessage returns false on any errors, or
* if the receiver parameter is null.
*
* Guestbook should work just fine on your homepage, so long as your www host
* supports the above SMTP protocol. You may otherwise have to experiment
* to get guestbook to work with custom settings. That could actually be
* fun... but since guestbook works as-is on my www server, I have no need
* to mess with it :-(
*
* Please let me know if you manage to get guestbook working by revising it
* for conditions other than those it is designed for.
*
* I hope this additional information is helpful.
* ----------------------------------------------------------------------------
* smtpSend class built up from code demonstated in sendmail.java
* by Godmar Back, University of Utah, Computer Systems Lab, 1996
* (a simple applet that sends you mail when your page is accessed)
* ----------------------------------------------------------------------------
*/
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;
import java.util.*;
class smtpSend
{
static final short PORT = 25;
String lastline;
DataInputStream in;
PrintStream p;
String mailhost, receiver, sender;
TextArea scroller = null;
Socket socket = null;
smtpSend( String mailhost, String receiver)
{
this.mailhost = mailhost;
this.receiver = receiver;
this.sender = receiver;
}
public void setScroller(TextArea scroller)
{
this.scroller = scroller;
}
void expect(String expected, String errorMsg)
throws Exception
{
lastline = in.readLine();
if (!lastline.startsWith(expected))
throw new Exception("Error: " + errorMsg + " (Expected " + expected + ")");
while (lastline.startsWith(expected + "-"))
lastline = in.readLine();
}
private void scrollOK()
{
scroller.appendText("OK");
}
private void openSocket()
throws Exception
{
display("Connecting to " + mailhost + "...");
try{
socket = new Socket(mailhost, PORT);
} catch (Exception e){
throw new Exception("Socket Error: Can't connect!");
}
scrollOK();
}
private void openInputStream()
throws Exception
{
display("Opening input stream" + "...");
try{
in = new DataInputStream(socket.getInputStream());
}catch (Exception e){
throw new Exception("Connection Error: Cannot open for input.");
}
scrollOK();
}
private PrintStream openOutputStream()
throws Exception
{
display("Opening output stream" + "...");
try{
p = new PrintStream(socket.getOutputStream());
}catch (Exception e){
throw new Exception("Connection Error: Cannot open for output.");
}
scrollOK();
return p;
}
private String getHeloHost()
throws Exception
{
String helohost;
display("Getting Local Host Name" + "...");
try{
helohost = InetAddress.getLocalHost().toString();
}catch (Exception e){
throw new Exception("Network Error: Unknown Local Host.");
}
scrollOK();
display("Local Host: " + helohost + "\r\n");
return helohost;
}
private void display(String string)
{
if (null != scroller)
scroller.appendText("\r\n" + string);
System.out.println(string);
}
private void sendData(String subject, String message)
throws Exception
{
try{
String helohost = getHeloHost();
p.print("HELO " + helohost + "\r\n");
expect("250", "HELO");
int pos;
String hello = "Hello ";
if ((pos = lastline.indexOf(hello)) != -1) {
helohost = lastline.substring(pos + hello.length());
helohost = helohost.substring(0, helohost.indexOf(' '));
}
p.print("MAIL FROM: " + sender + "\r\n");
expect("250", "MAIL FROM:");
p.print("RCPT TO: " + receiver + "\r\n");
expect("250", "RCPT TO:");
p.print("DATA\r\n");
expect("354", "DATA");
p.print("Subject: " + subject);
p.print(" (" + helohost + ")");
p.print("\r\n\r\n");
DataInputStream is = new DataInputStream(new StringBufferInputStream(message));
while (is.available() > 0) {
String ln = is.readLine();
if (ln.equals("."))
ln = "..";
p.println(ln);
}
p.print(new Date().toGMTString());
p.print("\r\n.\r\n");
expect("250", "end of data");
p.print("QUIT\r\n");
expect("221", "QUIT");
}catch(Exception e){
throw e;
}
}
public void mailMessage(String subject,String message)
throws Exception
{
if(null==receiver)throw new Exception("Parameter Error: No RECEIVER");
try{
openSocket();
openOutputStream();
openInputStream();
expect("220", "No greeting");
display("Sending message via SMTP...");
sendData(subject,message);
} catch(Exception e){
throw e;
}finally{
try {
if(socket != null)socket.close();
} catch(Exception e){}
}
scrollOK();
display("Message Sent - Thank You!");
display("Press 'Quit' to close this window.");
}
}
class logoPanel extends Canvas
{
Image image = null;
boolean threeD;
int iWidth, iHeight;
logoPanel(Image image, boolean threeD)
{
this.image = image;
this.threeD = threeD;
if(null != image){
iWidth=image.getWidth(this);
iHeight=image.getHeight(this);
}
else{
iWidth=400;
iHeight=100;
}
if(threeD)
resize(iWidth+4,iHeight+4);
else
resize(iWidth,iHeight);
}
public void paint(Graphics g)
{
int x,y;
g.setColor(Color.lightGray);
if(threeD){
x=y=2;
g.fill3DRect(0,0,size().width,size().height,false);
}
else{
x=y=0;
g.fillRect(0,0,size().width,size().height);
}
if(null != image)
g.drawImage(image,x,y,this);
}
public Dimension minimumSize()
{
if(threeD)
return(new Dimension(iWidth+4,iHeight+4));
else
return(new Dimension(iWidth,iHeight));
}
public Dimension preferredSize()
{
return this.minimumSize();
}
}
class gbFrame extends tFrame
{
static final String COPYRIGHT = "Guestbook II Copyright (C) 1996 by Bill Giel";
TextField tf1,tf2;
TextArea ta1, ta2;
tButton sendButton;
smtpSend smtp;
gbFrame(String title, smtpSend smtp, Image image, boolean threeD)
{
super(title);
this.smtp=smtp;
setFont(new Font("System",Font.PLAIN,14));
GridBagLayout gridbag=new GridBagLayout();
GridBagConstraints c=new GridBagConstraints();
setLayout(gridbag);
if(null != image){
c.insets=new Insets(5,5,8,5);
c.weightx=1;c.weighty=1;
c.fill=GridBagConstraints.NONE;
c.gridwidth=GridBagConstraints.REMAINDER;
logoPanel lp=new logoPanel(image, threeD);
gridbag.setConstraints(lp,c);
add(lp);
}
c.weightx=1;c.weighty=1;
c.insets=new Insets(3,5,0,0);
c.gridwidth=1;
c.fill=GridBagConstraints.NONE;
c.anchor=GridBagConstraints.EAST;
Label label = new Label(" Your Name (optional): ");
gridbag.setConstraints(label,c);
add(label);
c.insets=new Insets(3,0,0,5);
c.fill=GridBagConstraints.NONE;
c.anchor=GridBagConstraints.WEST;
c.gridwidth=GridBagConstraints.REMAINDER;
tf1=new TextField("",32);
gridbag.setConstraints(tf1,c);
add(tf1);
c.insets=new Insets(3,5,0,0);
c.gridwidth=1;
c.fill=GridBagConstraints.NONE;
c.anchor=GridBagConstraints.EAST;
label = new Label(" Your Email (optional): ");
gridbag.setConstraints(label,c);
add(label);
c.insets=new Insets(3,0,0,5);
c.gridwidth=GridBagConstraints.REMAINDER;
c.fill=GridBagConstraints.NONE;
c.anchor=GridBagConstraints.WEST;
tf2=new TextField("",32);
gridbag.setConstraints(tf2,c);
add(tf2);
c.insets=new Insets(8,5,0,5);
c.gridwidth=GridBagConstraints.REMAINDER;
c.fill=GridBagConstraints.NONE;
c.anchor=GridBagConstraints.CENTER;
label = new Label(" Any comments or suggestions are welcome! ");
gridbag.setConstraints(label,c);
add(label);
c.insets=new Insets(3,5,3,5);
c.gridwidth=GridBagConstraints.REMAINDER;;
c.fill=GridBagConstraints.BOTH;
ta1=new TextArea("",6,66);
gridbag.setConstraints(ta1,c);
add(ta1);
c.insets=new Insets(3,5,3,0);
c.gridwidth=2;
c.fill=GridBagConstraints.HORIZONTAL;
sendButton =new tButton("Send");
gridbag.setConstraints(sendButton,c);
add(sendButton);
c.insets=new Insets(3,0,3,0);
tButton b=new tButton("Clear");
gridbag.setConstraints(b,c);
add(b);
c.insets=new Insets(3,0,3,5);
c.gridwidth=GridBagConstraints.REMAINDER;
b=new tButton("Quit");
gridbag.setConstraints(b,c);
add(b);
c.insets=new Insets(3,5,3,5);
c.gridwidth=GridBagConstraints.REMAINDER;;
c.fill=GridBagConstraints.BOTH;
ta2=new TextArea("Ready.",3,66);
gridbag.setConstraints(ta2,c);
add(ta2,false);
ta2.setEditable(false);
validate();
smtp.setScroller(ta2);
setBackground(Color.lightGray);
System.out.println(COPYRIGHT);
}
private void clearText()
{
tf1.setText("");
tf2.setText("");
ta1.setText("");
ta2.setText("Ready.");
}
public void show()
{
pack();
//resize(preferredSize());
sendButton.enable();
clearText();
Dimension screenSize = getToolkit().getScreenSize();
move((screenSize.width - size().width)/2,
(screenSize.height - size().height)/2);
super.show();
}
public boolean action(Event e, Object arg)
{
String NOT_SENT = "Message NOT sent.";
String NO_DATA = "Nothing to send.";
if(arg.equals("Quit")){
hide();
return true;
}
else if(arg.equals("Clear")){
clearText();
return true;
}
else if (arg.equals("Send")){
if(tf1.getText().length() + tf2.getText().length() + ta1.getText().length() == 0){
ta2.appendText("\r\n" + NO_DATA);
System.out.println(NO_DATA);
}
else{
sendButton.disable();
String message="Guest: " + tf1.getText() + "\n" +
"Address: " + tf2.getText() + "\n\n" +
ta1.getText() ;
try{
smtp.mailMessage("Guestbook Entry!",message);
}catch (Exception exception){
String errMsg=exception.toString();
ta2.appendText("\r\n" + errMsg.substring(errMsg.indexOf(":")+2, errMsg.length()));
System.out.println(errMsg.substring(errMsg.indexOf(":")+2, errMsg.length()));
ta2.appendText("\r\n" + NOT_SENT);
System.out.println(NOT_SENT);
sendButton.enable();
}
}
}
return false;
}
}
public class gb2 extends Applet
{
static final String COPYRIGHT = "(C) 1996 by W.Giel";
static final String IMAGE_LOAD = "Loading Images...wait.";
static final String VERSION = "Guest Book II v2.0a (4 July 1996)";
static final String TITLE = "Guest Book II";
int width,height;
tFrame window=null;
smtpSend smtp = null;
String szButton;
String szReceiver;
String szTitle;
String szAppletImage;
String szLogoImage;
int imageCount = 0;
imageLoader il=null;
Image images[];
boolean threeD;
Color bgColor;
Color fgColor;
Button button;
public void init()
{
String szColor;
szReceiver = getParameter("receiver");
if(null==(szTitle=getParameter("title")))
szTitle=TITLE;
if(null==(szButton=getParameter("button")))
szButton=TITLE;
if(null==(szColor=getParameter("bgcolor")))
bgColor=Color.lightGray;
else bgColor = parseColorString(szColor);
if(null==(szColor=getParameter("fgcolor")))
fgColor=Color.black;
else fgColor = parseColorString(szColor);
String param=getParameter("3d_logo");
if(null != param && Integer.valueOf(param).intValue() > 0)threeD=true;
else threeD=false;
add (button=new Button(szButton));
width=size().width; height=size().height;
button.move((width-button.size().width)/2,
(width-button.size().width)/2);
if(null != (szAppletImage = getParameter("applet_image")))imageCount++;
if(null != (szLogoImage = getParameter("logo_image")))imageCount++;
if(imageCount > 0){
int index=0;
String szImage[] = new String[imageCount];
if(null != szAppletImage)szImage[index++]=szAppletImage;
if(null != szLogoImage)szImage[index]=szLogoImage;
il=new imageLoader(this, szImage, imageCount, null);
il.start();
images=new Image[imageCount];
}
}
private Color parseColorString(String colorString)
{
if(colorString.length()==6){
int R = Integer.valueOf(colorString.substring(0,2),16).intValue();
int G = Integer.valueOf(colorString.substring(2,4),16).intValue();
int B = Integer.valueOf(colorString.substring(4,6),16).intValue();
return new Color(R,G,B);
}
else return Color.lightGray;
}
public void paint(Graphics g)
{
Color color=g.getColor();
FontMetrics fm=g.getFontMetrics();
if(il != null){
g.drawString(IMAGE_LOAD,(size().width-fm.stringWidth(IMAGE_LOAD))/2,size().height-fm.getMaxDescent()-3);
while(null == (images = il.retrieveImages()));
il.stop();
il=null;
}
g.setColor(bgColor);
g.fill3DRect(0,0,size().width,size().height,true);
g.setColor(fgColor);
if(null != szAppletImage && null != images)
g.drawImage(images[0], (size().width-images[0].getWidth(this))/2, button.size().height
+(size().height-images[0].getHeight(this)-button.size().height)/3,this);
g.drawString(COPYRIGHT,(size().width-fm.stringWidth(COPYRIGHT))/2,size().height-fm.getMaxDescent()-3);
g.setColor(color);
}
public boolean action(Event evt, Object arg)
{
if(arg.equals(szButton)){
if (null == smtp)
smtp=new smtpSend(getCodeBase().getHost(),szReceiver);
if(null == window)
window=new gbFrame(szTitle, smtp, (null != szLogoImage && null != images)? images[imageCount-1] : null, threeD);
window.show();
return true;
}
else return false;
}
///////////////////////////////////////////////////
//Applet parameters - pretty much self-explanatory
///////////////////////////////////////////////////
public String[][] getParameterInfo()
{
String[][] info = {
{"width","int","width of the applet, in pixels"},
{"height","int","height of the applet, in pixels"},
{"receiver","string","SMTP 'RCPT TO:' parameter <null>"},
{"applet_image","string","GIF file to display on applet panel <null>"},
{"logo_image","string","GIF file to display on message dialog <null>"},
{"3d_logo","int","Non-zero produces an inletted logo image <0>"},
{"bgcolor","String","RGB hex triplet for applet panel background <lightGray>"},
{"fgcolor","String","RGB hex triplet for applet panel foreground <black>"},
{"title","string","title for popup window <Guest Book II>"},
{"button","string","Label to appear in applet's button <Guest Book II>"}
};
return info;
}
/////////////////////////////////////
//Applet name, author and info lines
/////////////////////////////////////
public String getAppletInfo()
{
return ( VERSION + " - simulates a guest log\n" +
"by E-mailing guest data to page owner, by Bill Giel\n" +
"http://www.nai.net/~rvdi/home.htm or rvdi@usa.nai.net\n" +
"Copyright 1996 by William Giel.");
}
}
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