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![Example
val duplicate: PartialFunction[Any,Any] = {
case s: String => s + s
case i: Int => i * 2
}
duplicate(3) // 6
duplicate("yuk") // "yukyuk”
duplicate(4.3) // MatchError](https://image.slidesharecdn.com/unfiltered-the-unframework-121031121657-phpapp01/85/Unfiltered-Unveiled-13-320.jpg)
![Scalate
Templates for Scala
SSP
<% val decks: List[Decks] %> SCAML
<html>
<body>
Mustache
<ul> …
<% for (deck <- decks) { %>
<li><%= deck.name%></li>
<% } %> -@ val decks: List[Decks]
</ul> %html
</body> <html> %body
</html> <body> %ul
<ul> - for (deck <- decks)
{{#decks}} %li= deck.name
<li>{{name}}</li>
{{/decks}}](https://image.slidesharecdn.com/unfiltered-the-unframework-121031121657-phpapp01/85/Unfiltered-Unveiled-19-320.jpg)
![Extractors ③
HttpRequest[A] → { case … => … }
object DotJson {
unapply[A](req: HttpRequest[A]) =
req.uri.endsWith(".json")
}
case DotJson() => ResponseString("Json!")](https://image.slidesharecdn.com/unfiltered-the-unframework-121031121657-phpapp01/85/Unfiltered-Unveiled-23-320.jpg)
Uploaded byWilfred Springer
Unfiltered Unveiled
This document provides an overview of the Unfiltered web framework for Scala. It discusses how Unfiltered allows defining HTTP services through pattern matching on HTTP requests and building responses. It provides examples of matching on different request properties and composing response parts. Key advantages highlighted are simplicity, control, production usage, and extensibility through custom policies defined via types and patterns.
More Related Content
Unfiltered Unveiled
- 1. Unfiltered Unveiled THEUNFRAMEWORK
- 2. Whoami Code / trainScala for a living Lately for a NYC startup Using Unfiltered Currently freelancer Former Xebia Former TomTom Former Sun Microstems Former ...
- 3. HTTP → GET / HTTP/1.1 Host: nxt.flotsam.nl ← HTTP/1.1 200 OK Date: Mon, 29 Oct 2012 … Last-Modified: Wed, 17 Accept: text/html … ETag: "4ce43eb8b40a4f…" Content-Type: text/html Content-Length: 9636 Server: AmazonS3
- 4.
- 5.
- 6. Toolkit Loosely coupled components thatcan be composed to solve Simple problems ☺ different problems Complex problems ☺
- 7. HTTP Stuff Stuff
- 8. HTTP Request Response
- 9. Web Appl. Request Response Request’Response’ Request’’ Response’’ Request’’’ Response’’’
- 10. That rings abell … match { case … => … case … => … case … => … case … => …
- 11. Pattern matching objmatch { case i: Int => i * 2 case s: String => s + s }
- 12. Partial Function { case … => … case … => … case … => … case … => …
- 13. Example val duplicate: PartialFunction[Any,Any]= { case s: String => s + s case i: Int => i * 2 } duplicate(3) // 6 duplicate("yuk") // "yukyuk” duplicate(4.3) // MatchError
- 14. Unfiltered { Intent case _ => ResponseString(“yay”) } GET / HTTP/ HTTP/1.1 200 OK Content-Length: 3
- 15. Hitting the road import unfiltered.filter._ import unfiltered.jetty._ import unfiltered.response._ Http(8090).filter(Planify { case _ => ResponseString("Ok") }).run
- 16. ResponseFunction ① case… => … case … => … ~> … ~> … Ok Html(…) NotFound Html5(…) ResponseString(…) JsonContent Json(…) TextXmlContent ResponseWriter(…) Redirect(…)
- 17. ResponseFunction ② Ok~> PlainTextContent ~> ResponseString("foo") Ok→ resp.setStatus(SC_OK) PlainTextContent→ resp.setContextType("text/plain") RepsonseString("foo")→ resp.setCharacterEncoding("UTF-8") val writer = resp.getWriter() writer.print("foo") writer.close
- 18. ResponseFunction ③ Ok~> PlainTextContent ~> ResponseString("foo") NotFound ~> HtmlContent ~> Html(<html> <body>Not found</body> </html>) Redirect("/index.html")
- 19. Scalate Templates for Scala SSP <% val decks: List[Decks] %> SCAML <html> <body> Mustache <ul> … <% for (deck <- decks) { %> <li><%= deck.name%></li> <% } %> -@ val decks: List[Decks] </ul> %html </body> <html> %body </html> <body> %ul <ul> - for (deck <- decks) {{#decks}} %li= deck.name <li>{{name}}</li> {{/decks}}
- 20. SCAML In a Nutshell !!! <!DOCTYPE html PUBLIC "-//… %html <html> %body <body> .masthead <div class="masthead"/> #main <div id="main"/> %p(onclick="") YES <p onclick="">YES</p> :javascript <script language="javascript"/> :markdown *Nice* <p><em>Nice</em></p> </body> </html>
- 21. Extractors ① case … => … case … & … & … => … GET(…) Accept(…) POST(…) UserAgent(…) DELETE(…) Host(…) PUT(…) IfModifiedSince(…) Path(…) Referer(…)
- 22. Extractors ② case GET(_) caseGET(Path(path)) case Path(Seg("give","me",something :: Nil)) (Matches "/give/me/money", setting something to "money".) case Path("/") & Params(params) case Accept("application/json")
- 23. Extractors ③ HttpRequest[A] →{ case … => … } object DotJson { unapply[A](req: HttpRequest[A]) = req.uri.endsWith(".json") } case DotJson() => ResponseString("Json!")
- 24. QParams ☣ MONAD ALERT import unfiltered.request.QParams._ case req @ Params(params) => val expected = for { lat <- lookup("lat") is required("missing") lon <- lookup("lon") is required("missing") } yield { Ok ~> PlainTextContent ~> ResponseString("%s, %s".format(lat.get, lon.get)) } expected(params) orFail { failures => BadRequest ~> ResponseString(failures.mkString)
- 25. But wait, there's more - OAuth - Secure switch - Upload - Routing kit - Netty binding - Basic authentication - Web Sockets
- 26. Key takeaways Simple ☺ Retaincontrol ☺ Used for real apps ☺ Hit the ground running ☺ Encode your own policies ☺ The source code is the documentation ⚇ Typesafe & extensible ☺☺☺ Vibe ☹
- 27. Questions? fl Wilfred Springer wilfred@flotsam.nl http://nxt.flotsam.nl/