Developing Web Apps with Haskell and Yesod. Safety-Driven Web Development. 2nd Edition - Helion

ebook

Autor: Michael Snoyman
ISBN: 978-14-919-1555-4
stron: 396, Format: ebook
Data wydania: 2015-02-17
Księgarnia: Helion

Cena książki: 109,65 zł (poprzednio: 127,50 zł)
Oszczędzasz: 14% (-17,85 zł)

Osoby, które kupiły tę książkę, wybierały także »

Tagi: Inne | Technologie webowe

This fast-moving guide introduces web application development with Haskell and Yesod, a potent language/framework combination that supports high-performing applications that are modular, type-safe, and concise. Fully updated for Yesod 1.4, this second edition shows you how Yesod handles widgets, forms, persistence, and RESTful content. Author Michael Snoyman also introduces various Haskell tools to supplement your basic knowledge of the language.

By the time you finish this book, you’ll create a production-quality web application with Yesod’s ready-to-use scaffolding. You’ll also examine several real-world examples, including a blog, a wiki, a JSON web service, and a Sphinx search server.

Build a simple application to learn Yesod’s foundation datatype and Web Application Interface (WAI)
Output HTML, CSS, and Javascript with Shakespearean template languages
Get an indepth look at Yesod’s core monads for producing cleaner, more modular code
Probe Yesod’s internal workings: learn the request handling process for a typical application
Build forms on top of widgets by implementing the yesod-form declarative API
Learn how Yesod and Haskell handle persistence and session data
Serve an HTML page and a machine-friendly JSON page from the same URL

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Spis treści

Developing Web Apps with Haskell and Yesod. Safety-Driven Web Development. 2nd Edition eBook -- spis treści

Preface
- Who This Book Is For
- Conventions Used in This Book
- Using Code Examples
- Safari Books Online
- How to Contact Us
- Acknowledgments
I. Basics
1. Introduction
- Type Safety
- Concise Code
- Performance
- Modularity
- A Solid Foundation
2. Haskell
- Terminology
- Tools
- Language Pragmas
- Overloaded Strings
- Type Families
- Template Haskell
- QuasiQuotes
- API Documentation
- Summary
3. Basics
- Hello, World
- Routing
- Handler Function
- The Foundation
- Running
- Resources and Type-Safe URLs
- Non-HTML Responses
- The Scaffolded Site
- Development Server
- Summary
4. Shakespearean Templates
- Synopsis
  - Hamlet (HTML)
  - Lucius (CSS)
  - Cassius (CSS)
  - Julius (JavaScript)
- Types
  - Type-Safe URLs
- Syntax
  - Hamlet Syntax
    - Tags
    - Interpolation
    - Attributes
    - Conditionals
    - maybe
    - forall
    - case
    - with
    - doctype
  - Lucius Syntax
  - Cassius Syntax
  - Julius Syntax
- Calling Shakespeare
  - Alternative Hamlet Types
- Other Shakespeare
- General Recommendations
5. Widgets
- Synopsis
- Whats in a Widget?
- Constructing Widgets
- Combining Widgets
- Generating IDs
- whamlet
  - Types
- Using Widgets
- Using Handler Functions
- Summary
6. The Yesod Typeclass
- Rendering and Parsing URLs
  - joinPath
  - cleanPath
- defaultLayout
  - getMessage
- Custom Error Pages
- External CSS and JavaScript
- Smarter Static Files
- Authentication/Authorization
- Some Simple Settings
- Summary
7. Routing and Handlers
- Route Syntax
  - Pieces
    - Types of pieces
    - Overlap checking
  - Resource Name
  - Handler Specification
- Dispatch
  - Return Type
    - Handler monad
    - Html
  - Arguments
- The Handler Functions
  - Application Information
  - Request Information
  - Short-Circuiting
  - Response Headers
- I/O and Debugging
- Query String and Hash Fragments
- Summary
8. Forms
- Synopsis
- Kinds of Forms
- Types
- Converting
- Creating AForms
  - Optional Fields
- Validation
- More Sophisticated Fields
- Running Forms
- i18n
- Monadic Forms
- Input Forms
- Custom Fields
- Values That Dont Come from the User
- Summary
9. Sessions
- clientsession
- Controlling Sessions
- Session Operations
- Messages
- Ultimate Destination
- Summary
10. Persistent
- Synopsis
- Solving the Boundary Issue
  - Types
  - Code Generation
  - PersistStore
- Migrations
- Uniqueness
- Queries
  - Fetching by ID
  - Fetching by Unique Constraint
  - Select Functions
    - SelectOpt
- Manipulation
  - Insert
  - Update
  - Delete
- Attributes
- Relations
- A Closer Look at Types
  - More Complicated, More Generic
- Custom Fields
- Persistent: Raw SQL
- Integration with Yesod
- More Complex SQL
- Something Besides SQLite
- Summary
11. Deploying Your Web App
- Keter
- Compiling
- Files to Deploy
- SSL and Static Files
- Warp
  - Nginx Configuration
  - Server Process
- Nginx + FastCGI
- Desktop
- CGI on Apache
- FastCGI on lighttpd
- CGI on lighttpd
II. Advanced
12. RESTful Content
- Request Methods
- Representations
  - JSON Conveniences
  - New Data Types
- Other Request Headers
- Summary
13. Yesods Monads
- Monad Transformers
- The Three Transformers
- Example: Database-Driven Navbar
- Example: Request Information
- Performance and Error Messages
- Adding a New Monad Transformer
- Summary
14. Authentication and Authorization
- Overview
- Authenticate Me
- Email
- Authorization
- Summary
15. Scaffolding and the Site Template
- How to Scaffold
- File Structure
  - Cabal File
  - Routes and Entities
  - Foundation and Application Modules
  - Import
  - Handler Modules
- widgetFile
- defaultLayout
- Static Files
- Summary
16. Internationalization
- Synopsis
- Overview
- Message Files
  - Specifying Types
- RenderMessage typeclass
- Interpolation
- Phrases, Not Words
17. Creating a Subsite
- Hello, World
18. Understanding a Request
- Handlers
  - Layers
  - Content
  - Short-Circuit Responses
- Dispatch
  - toWaiApp, toWaiAppPlain, and warp
  - Generated Code
  - Complete Code
- Summary
19. SQL Joins
- Multiauthor Blog
- Database Queries in Widgets
- Joins
- Esqueleto
- Streaming
- Summary
20. Yesod for Haskellers
- Hello, Warp
- What About Yesod?
- The HandlerT Monad Transformer
  - (To)Content, (To)TypedContent
  - HasContentType and Representations
  - Convenience warp Function
- Writing Handlers
  - Getting Request Parameters
  - Short-Circuiting
  - Streaming
- Dynamic Parameters
- Routing with Template Haskell
  - LiteApp
- Shakespeare
  - The URL Rendering Function
- Widgets
- Details We Wont Cover
III. Examples
21. Initializing Data in the Foundation Data Type
- Step 1: Define Your Foundation
- Step 2: Use the Foundation
- Step 3: Create the Foundation Value
- Summary
22. Blog: i18n, Authentication, Authorization, and Database
23. Wiki: Markdown, Chat Subsite, Event Source
- Subsite: Data
- Subsite: Handlers
- Subsite: Widget
- Master Site: Data
- Master Site: Instances
- Master Site: Wiki Handlers
- Master Site: Running
- Summary
24. JSON Web Service
- Server
- Client
25. Case Study: Sphinx-Based Search
- Sphinx Setup
- Basic Yesod Setup
- Searching
- Streaming xmlpipe Output
- Full Code
26. Visitor Counter
27. Single-Process Pub/Sub
- Foundation Data Type
- Allocate a Job
- Fork Our Background Job
- View Progress
- Complete Application
28. Environment Variables for Configuration
29. Route Attributes
- Alternative Approach: Hierarchical Routes
IV. Appendices
A. monad-control
- Overview
- Intuition
- Types
  - MonadTransControl
  - MonadControlIO
- Real-Life Examples
- Lost State
- More Complicated Cases
B. Web Application Interface
- The Interface
  - Response Body
  - Request Body
- Hello, World
- Resource Allocation
- Streaming Response
- Middleware
C. Settings Types
D. http-conduit
- Synopsis
- Concepts
- Request
- Manager
- Response
- http and httpLbs
E. xml-conduit
- Synopsis
- Types
  - The Four Types of Nodes
  - Documents
  - Events
- Text.XML
  - A Note About File Paths
- Cursor
- xml-hamlet
- xml2html
Index