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Four Other .NET Web Frameworks in Less Than an Hour
Christian Horsdal@chr_horsdal
http://horsdal.blogspot.com/
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Lead Software Architect @ Mjølner Informatics Husband and Father Some who enjoys
Clean code TDD’ing When ’GF wins Simplicity Whisky
Who Am I?
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There are alternatives to ASP.NET Know them!
Style matters
Tradeoffs, tradeoffs, tradeoffs Conventions <-> explicitness DRY <-> separation of concerns Abstract <-> concrete
Why?
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Run anywhere
IoC/DI to the bone
Embrace HTTP
OSS and community driven
Why?
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A taste of some alternatives
FubuMVC
OpenRasta
Nancy
Frank
What will you learn?
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Sample
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One Model In One Model Out Aka OMIOMO Aka Russian Doll
Convention over Configuration
Really cool built-in diagnostics
Everything is POCOs
FubuMVC – At a glance
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GET “/”
• No params
HomeController.get_Home
• Returns HomeViewModel
HomeView.cshtml
• Takes HomeViewModel
FubuMVC – ShortUrl Overview
POST “/”
• UrlShorteningModel
HomeController.post_Home
• Takes UrlShorteningModel
• Returns UrlShorteningViewModel
UrlShortenedView.cshtml• Takes
UrlShorteningViewModel
GET “/42”
• ShortenedUrlModel
HomeController.post_Home
• Takes ShortenedUrlMode• Returns FubuContinuation
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FubuMVC – ShortUrl – Serving the FORM
public class HomeController{ public HomeController(UrlStore urlStore) { this.urlStore = urlStore; }
public HomeViewModel get_home() { return new HomeViewModel(); } …}
public class HomeViewModel { }
@model ShortUrlInFubuMvc.HomeViewModel@{ Layout = null;} <!DOCTYPE html><html> <body> <form method="post" action="home"> <label>Url: </label> <input type="text" name="url"/> <input type="submit" value="shorten"/> </form> </body></html>
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FubuMVC – ShortUrl – POST the FORM
public UrlShorteningViewModel post_home(UrlShorteningModel input) { var shortenedUrl = input.Url.GetHashCode().ToString(); urlStore.SaveUrl(input.Url, shortenedUrl);
return new UrlShorteningViewModel { Host = "localhost:51862", HashCode = shortenedUrl }; }
public class UrlShorteningModel { public string Url { get; set; } }
public class UrlShorteningViewModel{ public string Host { get; set; } public string HashCode { get; set; }}
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FubuMVC – ShortUrl - Redirecting
public FubuContinuation get_Url(ShortenedUrlModel input) { var longUrl = urlStore.GetUrlFor(input.Url) ?? "/notfound/"; return FubuContinuation.RedirectTo(longUrl); }
public class ShortenedUrlModel { public string Url { get; set; } }
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Three things: Resources Handlers Codecs
Automatic conneg
Everything is POCOs
OpenRasta– At a glance
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Resource: “/” “/{shortenedUrl}” Home
Handler HomeHandler
“Codecs” WebForms viewengine Form data
Home resourceHomeHandler
GET “/” POST “/” GET “/42”
OpenRasta – Shorturl Overview
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OpenRasta– ShortUrl – Serving the FORM
public class HomeHandler { public HomeHandler(IRequest request, UrlStore urlStore) { this.request = request; this.urlStore = urlStore; }
public Home Get() { return new Home(); } …}
public class Home{ public string LongUrl { get; set; } public string ShortUrl { get; set; } public string Host { get; set; }}
public class Configuration : IConfigurationSource { public void Configure() { using (OpenRastaConfiguration.Manual) { ResourceSpace.Has .ResourcesOfType<Home>() .AtUri("/").And.AtUri("/home") .And.AtUri("/{shortenedUrl}") .HandledBy<HomeHandler>() .RenderedByAspx("~/Views/Home.aspx");
ResourceSpace.Uses .Resolver.AddDependencyInstance<UrlStore>(new MongoUrlStore("mongodb://localhost:27010/short_url")); } } }
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OpenRasta– ShortUrl – POST the FORM
public Home Post(Home input) { input.ShortUrl = input.LongUrl.GetHashCode().ToString(); input.Host = request.Uri.Host + ":" + request.Uri.Port;
urlStore.SaveUrl(input.LongUrl, input.ShortUrl);
return input; }
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OpenRasta– ShortUrl - Redirecting
public OperationResult Get(string shortenedUrl) { var longUrl = urlStore.GetUrlFor(shortenedUrl); if (longUrl != null) return new OperationResult.SeeOther { RedirectLocation = new Uri(longUrl) }; else return new OperationResult.NotFound(); }
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Lightweight, low ceremony Just works But easily swappable
DSLs
Built in diagnostics
Testability is first class
Nancy– At a glance
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Modules ShortUrlModule
Routes Get[“/”] Post[“/”] Get[“/{shortenedUrl}”]
A lambda for each
HTTP request Routes Handler
functionRespons
e
Nancy – Shorturl Overview
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Nancy– ShortUrl – Serving the FORM
public class ShortUrlModule : NancyModule{ public ShortUrlModule(UrlStore urlStore) { Get["/"] = _ => View["index.html"]; … } …}
<!DOCTYPE html><html> <body> <form method="post" action="home"> <label>Url: </label> <input type="text" name="url"/> <input type="submit" value="shorten"/> </form> </body></html>
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Nancy– ShortUrl – POST the FORM
public class ShortUrlModule : NancyModule{ public ShortUrlModule(UrlStore urlStore) { Get["/"] = _ => View["index.html"]; Post["/"] = _ => ShortenUrl(urlStore); … } private Response ShortenUrl(UrlStore urlStore) { string longUrl = Request.Form.url; var shortUrl = longUrl.GetHashCode().ToString(); urlStore.SaveUrl(longUrl, shortUrl); return View["shortened_url", new { Request.Headers.Host, ShortUrl = shortUrl }]; } …}
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Nancy– ShortUrl - Redirecting
public class ShortUrlModule : NancyModule{ public ShortUrlModule(UrlStore urlStore) { Get["/"] = _ => View["index.html"]; Post["/"] = _ => ShortenUrl(urlStore); Get["/{shorturl}"] = param => { string shortUrl = param.shorturl; return Response.AsRedirect(urlStore.GetUrlFor(shortUrl.ToString())); }; }…}
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F#
Bare bones approach to HTTP services
Leverage WebAPI
Compositional
Frank– At a glance
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Frank– ShortUrl – Serving the FORM
let urlShortenerView = @"<!doctype html><meta charset=utf-8> <title>Hello</title> <p>Hello, world! <form action=""/"" method=""post"" enctype=""multipart/form-data""> <input type=""input"" name=""longUrl"" value=""long url""> <input type=""submit"">"
let urlShortenerForm request = async { return respond HttpStatusCode.OK (new StringContent(urlShortenerView, System.Text.Encoding.UTF8, "text/html")) <| ``Content-Type`` "text/html"}
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Frank– ShortUrl – POST the FORM
let createShortUrl (request: HttpRequestMessage) = async { let! value = request.Content.AsyncReadAsMultipart() let longUrl = value.FirstDispositionNameOrDefault("longUrl") .ReadAsStringAsync().Result; let urlKey = longUrl.GetHashCode().ToString()
urlStore.Add(urlKey, longUrl) let shortUrl = baseUri + "/" + longUrl.GetHashCode().ToString() return respond HttpStatusCode.OK (new StringContent(shortUrlCreatedView(shortUrl), System.Text.Encoding.UTF8, "text/html")) <| ``Content-Type`` "text/html"}
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Frank– ShortUrl - Redirecting
let getShortUrl (request: HttpRequestMessage) = async { let urlKey = request .RequestUri .Segments.[request.RequestUri.Segments.Length - 1] let longUrl = urlStore.[urlKey] return respond HttpStatusCode.Redirect (new EmptyContent()) <| Location (new Uri(longUrl))}
let rootResource = routeResource "/" [ get urlShortenerForm <|> post createShortUrl ]let redirectReource = routeResource "/{shortUrl}" [ get getShortUrl ]
let app = merge [ rootResource; redirectReource ]
let config = new HttpSelfHostConfiguration(baseUri)config.Register app
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Why, again?
There are alternatives to ASP.NET Know them!
Style matters
Tradeoffs, tradeoffs, tradeoffs
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FubuMVC OMIOMU
OpenRasta Resources, Handlers, Codecs
Nancy DSL
Frank F#
What might you have learned?
A taste of some altenatives
WHEN, WHAT, WHERE?FubuMVC, OpenRasta, Nancy, Frank
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Evaluation page: http://bit.ly/cd2012b2Please fill in! ‘kthxbai
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