iTP Active Transaction Pages (iTP ATP) Programmer's Guide

ATP Web Page and Script Structure
iTP Active Transaction Pages (iTP ATP) Programmer’s Guide—522292-002
3-17
Using TCP/IP Sockets from JavaScript
The script in Example 3-10 consists of a call to a function called sendMail, which in
turn calls other functions defined earlier in the script. The order of operations is typical
for a sockets application:
Example 3-10. Code for TCP/IP Sockets Script - Function Call
// Send a mail message ...
function sendmail (smtphost, from, fromHost, to, toHost, subject,
message) {
var rc;
// Create a socket connection .....
var s=new atp.socket (smtphost, 25);
handleErrors (s, 'constructor');
// Get started ....
s.write ("HELLO " + fromHost + "\n");
handleErrors (s, 'HELLO write');
rc = handleReply (s, 'HELLO reply');
// Write the sender ....
s.write ("MAIL FROM: " + from + '@' + fromHost+ "\n");
handleErrors (s, 'MAIL FROM write');
rc = handleReply (s, 'MAIL FROM reply');
// Write the recipient ....
s.write ("RCPT TO: " + to + '@' + toHost+ "\n");
handleErrors (s, 'RCPT TO write');
rc = handleReply (s, 'RCPT TO reply');
// Write the data header ...
s.write ("DATA\n");
handleErrors (s, 'DATA write');
rc = handleReply (s, 'DATA reply', 354);
// Write the subject ....
s.write ("SUBJECT: " + subject + "\n");
handleErrors (s, 'SUBJECT write');
// Write the message body ...
if (message.indexOf('\n',message.length-1) == message.length-1)
message += '.\n';
else
message += '\n.\n';
s.write (message);
handleErrors (s, 'message body write');
rc = handleReply (s, 'message body reply');
// Finish off ...
s.write ("QUIT\n");
handleErrors (s, 'QUIT write');
rc = handleReply (s, 'QUIT reply');
// Close the TCP/IP socket
s.close ();
atp.print ('<br>Message sent.<br>\n');
return;
}