.NET/ASP.NET/C#/VB.NET PDF Document SDK

In this section we re going to look at how you can use just two random standard libraries (net/http and OpenStruct), so that you re prepared for using and working with other libraries in later chapters, where you ll be using many other standard libraries in a similar way. A list of all the standard libraries, including documentation, is available at http:// www.ruby-doc.org/stdlib/, although a sizable number of them are covered in more detail in 16 of this book.

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down, particularly if using a preinstalled version of Ruby. However, if you installed Ruby from source, all the demonstrations in this section should work.

HTTP stands for HyperText Transfer Protocol, and it s the main protocol that makes the World Wide Web work, as it provides the mechanism by which Web pages, files, and other media can be sent between Web servers and clients.

FIGURE 8-37 A click of a button automatically formats the slides and adds the same foundation graphic

Ruby provides basic support for HTTP via the net/http library. For example, it s trivial to write a Ruby script that can download and print out the contents of a particular Web page:

if name == 'Ralph Auldus Melish': print 'Welcome!' elif name == 'Enid': # Not finished yet... elif name == 'Bill Gates': print 'Access Denied' This code won t run because an empty block is illegal in Python. To fix this, simply add a pass statement to the middle block: if name == 'Ralph Auldus Melish': print 'Welcome!' elif name == 'Enid': # Not finished yet... pass elif name == 'Bill Gates': print 'Access Denied'

require 'net/http' Net::HTTP.get_print('www.rubyinside.com', '/')

You don t know what you have until you see it, and that s especially true with graphics. That s why you should create a range of options for yourself before you decide what to do with the design of your slides. When a professional design rm starts a job for a client, it s common practice to present the client with three design options. From the perspective of the rm, this gives designers a free hand to express their creativity by trying three completely different treatments. From the perspective of clients, this gives a range of options that they can review and select from based on what works for them. From the perspectives of both parties, this provides a way of stepping back from the emotional attachment anyone has to the different designs and gives a point of reference and comparison that can be used in deciding which design direction to take. This time-tested method will serve you well when you design your PowerPoint storyboard. Select the sketches for the Key Point slides from the presentation you ve created, and try three completely different design treatments. Show the design treatments to your team, and test them on people unfamiliar with the presentation and ask for feedback. When you re satis ed with a design that will work for the audience, extend that design across all of the slides in the presentation.

If you ran this code, after a few seconds many pages of HTML code should fly past on your screen. The first line loads the net/http library into the current program, and the second line calls a class method on the Net::HTTP class (where Net is a module defining the Net namespace, and HTTP is a subclass) that gets and prints (hence get_print) the Web page at http://www.rubyinside.com/. It s just as easy to put the contents of any Web page into a string, for further manipulation by your program:

require 'net/http' url = URI.parse('http://www.rubyinside.com/') response = Net::HTTP.start(url.host, url.port) do |http| http.get(url.path) end content = response.body

If you have the resources, invite a professional designer to help you design your slides and storyboard. Bring the designer in early if possible, while you write the story template so that the designer can absorb and learn from your thinking process. Working with the designer from the start avoids the frustration that graphic designers

Note An alternative to the combination of a comment and a pass statement is to simply insert a string. This is especially useful for unfinished functions (see 6) and classes (see 7) because they will then act as docstrings (explained in 6).