Programming Python, 3rd Edition

16.1. "Oh What a Tangled Web We Weave" This chapter is the fourth part of our look at Python Internet programming. In the last three chapters, we explored sockets and basic client-side programming interfaces such as FTP and email. In...

16.2. What's a Server-Side CGI Script? Simply put, CGI scripts implement much of the interaction you typically experience on the Web. They are a standard and widely used mechanism for programming web-based systems and web site interaction. Th...

16.3. Running Server-Side Examples Like GUIs, web-based systems are highly interactive, and the best way to get a feel for some of these examples is to test-drive them live. Before we get into some code, let's get set up to run the e...

16.4. Climbing the CGI Learning Curve Now that we've looked at setup issues, it's time to get into concrete programming details. This section is a tutorial that introduces CGI coding one step at a timefrom simple, noninteractive scripts to larger ...

16.5. Saving State Information in CGI Scripts One of the most unusual aspects of the basic CGI model, and one of its starkest contrasts to the GUI programming techniques we studied in the prior part of this book, is that CGI scripts are st...

16.6. The Hello World Selector Let's get back to writing some code again. It's time for something a bit more useful than the examples we've seen so far (well, more entertaining, at least). This section presents a program that disp...

16.7. Refactoring Code for Maintainability Let's step back from coding details for just a moment to gain some design perspective. As we've seen, Python code, by and large, automatically lends itself to systems that are easy to read and mai...

16.8. More on HTML and URL Escapes Perhaps the subtlest change in the last section's rewrite is that, for robustness, this version's reply script (Example 16-23) also calls cgi.escape for the language name, not just for the language's c...

16.9. Transferring Files to Clients and Servers It's time to explain a bit of HTML code we've been keeping in the shadows. Did you notice those hyperlinks on the language selector example's main page for showing the CGI script'...