1. new in this version
2. build a web 2.0 app in happstack
3. why happstack is cool
4. getting started with happstack
5. prerequisites
6. cabal install me
7. first shot at happstack
8. url handling
9. basic HTML inclusion
10. templates
11. stringtemplate basics
12. debugging
13. form data: get and post
14. form data: file uploads
15. cookies
16. introduction to macid
17. first steps with macid
18. scaling with multimaster
19. using macid safely
20. macid dummy data
21. changing the data model
22. macid stress test
23. limitations of macid
24. foreign characters
25. IxSets
26. cron jobs
27. thanks
28. appendix (floundering in ghci)

Basic HTML inclusion

Happstack is completely agnostic as to the source of the HTML served. There is no required templating system. We'll be looking at a few simple ways to include HTML in your application:

• HtmlString
• Text.Html
• HStringTemplate

HtmlString

We've already seen the use of HtmlString, from the happstack-helpers package, in the ControllerBasic.hs file. You can include your HTML as String literals wrapped with a HtmlString constructor and the ToMessage instance for HtmlString will take care of the rest.

Text.Html

I won't be providing a tutorial on using Text.Html, but I want to point out that there is a ToMessage instance for Html. This means that anything built from the combinators included in Text.Html will display correctly.

HStringTemplate

Lets move on to the next couple of chapters, which will cover the use HStringTemplate in some depth.