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Using Perl on the Web - training course
CGI, mod-Perl, and other standards. Sessions, cookies, content management, etc.
Duration: 2 days • Price: £790.00 +VAT (with hotel room), or £650.00 +VAT (without room), • Venue: Melksham, Wiltshire


COURSE START DATES
Usually scheduled to meet customer needs or run as a private course. Please email for details
DESCRIPTION
This advanced course takes the Perl programmer through to making full use of Perl on the Web.

The course starts with a short revision of Perl, allowing trainees the opportunity to brush up on fundamental topics if they wish. Web and networking topics then follow.

Quite early in the course, you'll be writing simple Web-based applications, allowing your Web site visitors to look up data in text files, for example. Other topics, such as more complex forms, state and cookies will be studied so that you know how to write applications that consist of a series of forms, and allow information to be saved onto the server. Security aspects, such as ensuring that different users' data don't get mixed up and password issues, etc., are also covered.

We then cover the use of Perl to automate network tasks such as FTP and Telnet, and we show you how you can write your own clients and servers.

The course includes many examples using resources that are available for free on the CPAN or elsewhere, such as standard Perl modules and modPerl, SSI and PerlScript within ASP.

This course covers version 5 of Perl (the current version), with footnotes where appropriate to tell you about Perl 6. Our plans for Perl 6 training are described on a separate page.

PREREQUISITES
Knowledge of the Perl programming language, as taught on our Learning to program in Perl courses. A knowledge of the fundamentals of HTML is useful, but not mandatory.

Getting the most from your Well House Consultants course [Link]
SUBJECT BACKGROUND
When internet applications took off, Perl was especially suitable as the language in which they should be written. It interfaces well to web applications and servers, has a quick development cycle, and it's open source so that are no complex licensing issues. Many web applications are written in Perl to thid day, although languages such as PHP (which was designed specifically for the web use) and Ruby are strong and often used alternatives.
COURSE CONTENT
Course Summary: [Link]
 
A quick review of the fundamentals
Perl Review (module P251) For experienced Perl programmers starting on an advanced course. The logistics. Basic program structure. Variables. Operators. The environment. Blocks, conditionals and loops. Regular expressions. Lists and hashes. Subroutines. References. Objects. Special variables. Standard modules. Input and output.
A Quick Look Ahead (module P770) Other facilities in Perl - further modules, objects, tieing. Databases, Relational Databases, XML, XSLT and Data Munging. Writing distributable modules. Perl/Tk, embedding Perl in your application and your application in Perl. Uses of Perl on a network - Web-page interaction, clients and servers. Uses of Perl for portable system administration tasks. Using Perl to glue other applications together (including databases).
Perl on the Network (module P252) How Perl can be used on a network. Network structure. Programming for networks. Server embedded applications. Client side applications. Data Munging for the Web.
Anatomy of Networking (module P401) Routing, IP addresses and TCP. Clients and servers. DNS Name resolutions.
Commercial and Legal Aspects (module A213) Why discuss this on a technical course? Data Protection. Privacy and credit card security. Unsolicited commercial emailing and mailing lists. Accessability. Marketing and visibility. Cookie law.
 
Using Perl for server side programming
HTML - An Overview (module Q624) Tags. Structure of a page. Special characters and new lines. Some common tags. Lists, tables, frames, forms, applets, images, etc. Which HTML standard?
HTML for Web Application Authors (module Q625) Frames and Images. Style Sheets. Applets and other Objects.
The Common Gateway Interface (module P403) The mechanism of the Web. The need for server-side programming. Web server structure. Your first CGI program. Error handling. Checking with your ISP or webmaster. Forms. URL encoding. Encoding the returned page.
Extending Flexibility Using CGI (module P404) Returning a location. Writing a document to the server. Forms with multiple fields. Get v post. The CGI program environment. Other types of form element.
More CGI Programs and Facilities (module P406) Sending email from a CGI program. Recognising the browser. Uploading and downloading files. Multipart documents; server push and client pull. Server Side Includes.
State and Cookies (module P407) The need for non-transient data. Multiple users. Hidden fields. Shopping carts. State diagrams. Central database example. Persistent cookies.
Standard Web Modules (module P408) CGI.pm. CGI-Lite.pm. LWP - User Agent. CGI::Cookie. Legal and security issues with cookies and other people's content.
Using CGI.pm (module P412) Introduction. What does CGI.pm provide? Object and procedural interfaces. Cautionary notes. HTML element support. Form support. Reading from a form. Debug tools. State and cookies via CGI.pm. Shopping cart example. Handling multiple select fields. File uploads via CGI.pm. Further uses of header. Introduction to the LWP module.
Good CGI scripting. (module P774) Planning your application. State diagrams and the six step process. Read form, read session, finish, start, save session, send response. Sticky fields and sanitising user inputs. Templating, Web helpers. Cleaning up old carts. Business logic. Putting it all together in the 4 layer model. Should you use sessions or hidden fields? Sample Quiz question system using these techniques.
 
The wider user of Perl on your network
Writing Your Own Simple Client and Server (module P402) Checking protocols using telnet. RFC868 - time protocol. Low-level client network access. Using the socket module. Using name services. Running network commands directly. Writing a time server. Byte order and end-of-line considerations. Buffering. Finger client example.
FTP and Telnet Modules (module P616) Net::FTP, First example: Creating object; login; navigation; put and get. Net::FTP, modes, enquiries, automated search example, other facilities. Net::Telnet, connecting and logging in. Running remote commands. Logging out. Using Net::Telnet to access other net protocols (http example)
Robots, Crawlers and Spiders (module P608) Retrieving pages automatically. Checking links. Checking and analysing a site. Providing a Web frontend for these facilities. Retrieving a site for later viewing. Acceptable and unacceptable behaviour of automated clients.
Searching (module P409) The science of searching. Local search using ISINDEX. Other ways of searching a small local area. How do you decide what's a match? How do you rank the matches? Searching a larger site - building an index. Wider searches - commercial products. Finding sites and information by crawling. Leaving enquiries running. Robotic searches.
Automated Email Answering (module P410) Cron, at and batch. Can I find the user's name? Mailing modules from the CPAN. Using SMTP directly - RFC 821 and 822. Reading email via POP3. Automatic processing of emails. An email responder. Using autosend / autoreceive to pass firewalls.
Alternatives to CGI (module P623) Hello mod_perl world. Apache Module Structure. Maintaining state and authentication with mod_perl. Customisation and the use of other request phases. Overview of alternatives to CGI and mod_perl. Active Server Pages (ASP). Server Side Includes (SSI). Apache modules. Servelets and JSPs. PHP. Directly written servers.
Using Perl for Web Site Management (module P604) Regular expressions - some tips for handling HTML. Using a template page to create a Web site. Checking for broken links. Extracting descriptions and keywords. Automated index pages. Analysing the server log files.

TUTOR and COURSE AUTHOR
Graham Ellis - graham@wellho.net [email]  [about Graham]
VENUE
Melksham, Wiltshire
Public courses run at Well House Manor - our own purpose fitted training centre and business hotel / conference centre in Melksham.
• Download Melksham Map - [pdf file (750k)] • Google Map - [Link]
PRICE
1 student   2 students   3 students   For 4 or more students
from the same company,
please consider a private course.
 With hotel room
£790.00
(£948.00 inc VAT)
Without room
£650.00
(£780.00 inc VAT) 
 With hotel rooms
£1530.00
(£1836.00 inc VAT)
Without rooms
£1250.00
(£1500.00 inc VAT) 
 With hotel rooms
£2270.00
(£2724.00 inc VAT)
Without rooms
£1850.00
(£2220.00 inc VAT) 
 
Notes:
• Multiple discount applies to bookings for second and subsequent delegates on the same running of a course, and on same order.
• Hotel rooms are available for arrival the night before the course starts, for departure after the end of the course on the last day.
FOLLOW UPS
If you're working with a larger application, you might wish to attend our other advanced Perl course - Perl for Larger Projects.
Other advanced material, not covered on regular public courses, is available through a Perl Extra day.

Upon completion of your course, you'll have online access to the source code of all the examples from the course, and you'll have access to the "Ask the Tutor" forum where you can raise questions. We also encourage you to email the tutor, and to visit us again to use our library as appropriate.

Certification? - [Link]
FOR FURTHER INFORMATION
Public (scheduled) courses -- http://www.wellho.net/course/ctc.html
For more information about our public courses in general, such as class size, course times, materials provided, special requests, accommodation list, finding our centre, etc.
Terms and Conditions -- http://www.wellho.net/net/terms.html
Covering topics such as delegate substitution, payment, cancellation policy and other matters.

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