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Perl module P405
Web Service - Our Own Client
Exercises, examples and other material relating to training module P405. This topic is presented on public course Perl Extra

Many CPAN modules exist to allow you to connect to common network services, and usually it's much better to use these modules than to roll your own. Sometimes, though, you'll want to program network servers or clients for your own protocols or to meet special requirements. This module shows you how, using the HTTP protocol as an example. We've included both servers and clients to show you both ends of the link.


Articles and tips on this subjectupdated
2402Automated Browsing in Perl
I'm reminded on today's Perl course just how powerful some of the modules are, and how much you can do in so little code. LWP::UserAgent turns your Perl into an automated browser .. the following four lines reading the robots.txt off my web site. use LWP::UserAgent; $connex = new LWP::UserAgent("agent" ...
2009-09-11
(short)
2229Do not re-invent the wheel - use a Perl module
"If you think 'surely someone has done this before', you're probably right ... and in Perl, you'll find the resource you need available as a module on your system, or if it's not quite to common, on the CPAN". I was reminded of this advise today, when I got involved with web site checking ... and rather ...
2009-06-12
 
Examples from our training material
cgiwebclient   CGI script to fetch page from another server
get_courses   Script to call an OO module that grabs a web page
grablunch   Command line program to access webpage object
pg1   LWP - simplest test
pg2   LWP - sets own User Agent
pwebclient   Stand alone program to use web_fetch module to find links
pwebserver   Perl server - low level socket programming - HTTP protocol tool
wclient   Simple web client - collect all links
web_fetch.pm   Simple web client subroutine - connect via HTTP and get a page
webpage.pm   Module to connect to a web server and grab a page
wtserv   Web server in Perl to expose file system
xmx   Parsing an XML feed which we get off a web server
Background information
Some modules are available for download as a sample of our material or under an Open Training Notes License for free download from http://www.training-notes.co.uk.
Topics covered in this module
Our own "web server".
Writing our own client.
Another example in which a web page is an object.
Rules for designing clients.
Complete learning
If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule page.

Well House Consultants specialise in training courses in Python, Perl, PHP, and MySQL. We run Private Courses throughout the UK (and beyond for longer courses), and Public Courses at our training centre in Melksham, Wiltshire, England. It's surprisingly cost effective to come on our public courses - even if you live in a different country or continent to us.

We have a technical library of over 700 books on the subjects on which we teach. These books are available for reference at our training centre. Also available is the Opentalk Forum for discussion of technical questions.


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