Grab a web page - Perl example

Intersystem Communications example from a Well House Consultants training course
More on Intersystem Communications [link]

This example is described in the following article(s):
• Perl Socket Programming Examples - [link]

This example references the following resources:
http://www.wellho.net/whc.ico
http://www.wellho.net/whc.ico
http://www.wellho.net/share/diary.html
http://www.wellho.net/horse/
https://lightning.he.net/~wellho/coursebooking/index.php
http://www.wellho.net/resources/privacy.html#copyright

Source code: s1 Module: P224

# Grab a web page - structured programming example

# This example uses structured programming techniques
# where each logical element of the program is written
# as a sub call - a hierarchy of code that's fitted
# together like a pyramid. Why do this?
#
# 1. It makes the code more readable
# 2. It makes the code more re-usable
# 3. It makes the code easier to test
# 4. It makes the code easier to maintain

use myweblib;

# Get a client's connection to the host ...
get_connection("www.wellho.net",80);

# Turn buffering OFF on the socket
sockbuffer(1);

# Have our chat with the server
@response = do_httpd("/course/index.html");

# Turn buffering back on
sockbuffer(0);

# Use what you got!
@linkies = getlinks(@response);
print @linkies;

__END__

Here's how it runs:

Dorothy:ppcsrd08 grahamellis$ perl s1
/bing/C3.css
http://www.wellho.net/whc.ico
http://www.wellho.net/whc.ico
/course/perl.html
/course/python.html
/course/mysql.html
/course/tcl-tk.html
/course/ruby.html
/course/c.html
/course/ubfull.html
/course/java.html
/course/tomcat.html
/course/php.html
/course/lwfull.html
/course/linux.html
/course/index.html?pwidth=wide
/index.html
/resources/mywellho.html?revert=%2Fcourse%2Findex.html
/course/index.html
http://www.wellho.net/share/diary.html
http://www.wellho.net/horse/
/forum/index.html
/resources/index.html
/resources/smap.php?adder=/course
/net/staff.html
/resources/contact.html
/share/melksham.html
http://www.wellhousemanor.co.uk
/course/stc.html
/course/otc.html
pofull.html
lbfull.html
atfull.html
/share/Melksham.html
/course/index.html
/course/ctc.html
https://lightning.he.net/~wellho/coursebooking/index.php
ub.html
yp.html
lp.html
ca.html
rp.html
http://www.wellho.net/resources/privacy.html#copyright
/resources/freephone.html
mailto:info@wellho.net
http://www.wellho.net
callto://wellholisa
Dorothy:ppcsrd08 grahamellis$

Learn about this subject

This module and example are covered on our public Perl Extra course. If you have a group of three or more trainees who need to learn the subject, we can also arrange a private or on site course for you.

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Other Examples

This example comes from our "Intersystem Communications" training module. You'll find a description of the topic and some other closely related examples on the "Intersystem Communications" module index page.

Full description of the source code

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