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dist | ||
test-dest | ||
example/log | ||
example/snaplets/fay/devel.cfg | ||
example/snaplets/fay/js | ||
|
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:set -isrc | ||
:set -hide-package MonadCatchIO-mtl | ||
:set -hide-package monads-fd | ||
:set -XOverloadedStrings |
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Name: example | ||
Version: 0.1 | ||
Synopsis: Project Synopsis Here | ||
Description: Project Description Here | ||
License: AllRightsReserved | ||
Author: Author | ||
Maintainer: maintainer@example.com | ||
Stability: Experimental | ||
Category: Web | ||
Build-type: Simple | ||
Cabal-version: >=1.2 | ||
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Flag development | ||
Description: Whether to build the server in development (interpreted) mode | ||
Default: False | ||
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Executable example | ||
hs-source-dirs: src | ||
main-is: Main.hs | ||
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Build-depends: | ||
base >= 4 && < 5, | ||
bytestring >= 0.9.1 && < 0.10, | ||
data-lens >= 2.0.1 && < 2.11, | ||
data-lens-template >= 2.1 && < 2.2, | ||
heist >= 0.8 && < 0.9, | ||
MonadCatchIO-transformers >= 0.2.1 && < 0.4, | ||
mtl >= 2 && < 3, | ||
snap == 0.9.*, | ||
snap-core == 0.9.*, | ||
snap-server == 0.9.*, | ||
snap-loader-static == 0.9.*, | ||
snaplet-fay == 0.1.0.0, | ||
text >= 0.11 && < 0.12, | ||
time >= 1.1 && < 1.5, | ||
xmlhtml >= 0.1 | ||
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if flag(development) | ||
build-depends: | ||
snap-loader-dynamic == 0.9.* | ||
cpp-options: -DDEVELOPMENT | ||
-- In development mode, speed is already going to suffer, so skip | ||
-- the fancy optimization flags. Additionally, disable all | ||
-- warnings. The hint library doesn't give an option to execute | ||
-- compiled code when there were also warnings, so disabling | ||
-- warnings allows quicker workflow. | ||
ghc-options: -threaded -w | ||
else | ||
if impl(ghc >= 6.12.0) | ||
ghc-options: -threaded -Wall -fwarn-tabs -funbox-strict-fields -O2 | ||
-fno-warn-orphans -fno-warn-unused-do-bind | ||
else | ||
ghc-options: -threaded -Wall -fwarn-tabs -funbox-strict-fields -O2 | ||
-fno-warn-orphans |
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{-# LANGUAGE EmptyDataDecls #-} | ||
{-# LANGUAGE NoImplicitPrelude #-} | ||
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module Dom where | ||
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data Element | ||
instance Foreign Element | ||
data Event | ||
instance Foreign Event | ||
data Global | ||
instance Foreign Global | ||
data Document | ||
instance Foreign Document | ||
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head :: [a] -> a | ||
head (x:_) = x | ||
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getBody :: Fay Element | ||
getBody = firstByTag "body" | ||
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getWindow :: Fay Global | ||
getWindow = ffi "window" | ||
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getDocument :: Fay Document | ||
getDocument = ffi "document" | ||
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firstByTag :: String -> Fay Element | ||
firstByTag tag = byTag tag >>= (return . head) | ||
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byTag :: String -> Fay [Element] | ||
byTag = ffi "document.getElementsByTagName(%1)" | ||
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byId :: String -> Fay Element | ||
byId = ffi "document.getElementById(%1)" | ||
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addEvent :: Foreign f => Element -> String -> (Event -> Fay f) -> Fay () | ||
addEvent = ffi "%1.addEventListener(%2,%3)" | ||
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addOnload :: Foreign f => Fay f -> Fay () | ||
addOnload = ffi "window.addEventListener(\"load\", %1)" | ||
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stopProp :: Event -> Fay () | ||
stopProp = ffi "%1.stopPropagation()" | ||
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preventDefault :: Event -> Fay () | ||
preventDefault = ffi "%1.preventDefault()" | ||
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createElement :: String -> Fay Element | ||
createElement = ffi "document.createElement(%1)" | ||
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setInnerHtml :: Element -> String -> Fay () | ||
setInnerHtml = ffi "%1.innerHTML = %2" | ||
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appendChild :: Element -> Element -> Fay () | ||
appendChild = ffi "%1.appendChild(%2)" | ||
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printS :: String -> Fay () | ||
printS = ffi "console.log(%1)" | ||
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print :: Foreign f => f -> Fay () | ||
print = ffi "console.log(%1)" |
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module Index where | ||
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import Dom | ||
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main :: Fay () | ||
main = addOnload onload | ||
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onload :: Fay () | ||
onload = do | ||
contents <- byId "content" | ||
div <- createElement "div" | ||
setInnerHtml div "This element was created by Fay through an onload handler!" | ||
appendChild contents div | ||
return () |
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<html> | ||
<head> | ||
<title>Snap web server</title> | ||
<link rel="stylesheet" type="text/css" href="/screen.css"/> | ||
</head> | ||
<body> | ||
<div id="content"> | ||
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<content/> | ||
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</div> | ||
</body> | ||
</html> |
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<html> | ||
<head> | ||
<title>Snaplet Fay Example Application</title> | ||
<link rel="stylesheet" type="text/css" href="/screen.css"/> | ||
<script src="/fay/Index.js"></script> | ||
</head> | ||
<body> | ||
<div id="content"> | ||
<h1>Snaplet Fay Example Application</h1> | ||
</div> | ||
</body> | ||
</html> |
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{-# LANGUAGE TemplateHaskell #-} | ||
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------------------------------------------------------------------------------ | ||
-- | This module defines our application's state type and an alias for its | ||
-- handler monad. | ||
module Application where | ||
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------------------------------------------------------------------------------ | ||
import Data.Lens.Template | ||
import Snap.Snaplet | ||
import Snap.Snaplet.Heist | ||
import Snap.Snaplet.Fay | ||
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------------------------------------------------------------------------------ | ||
data App = App | ||
{ _heist :: Snaplet (Heist App) | ||
, _fay :: Snaplet Fay | ||
} | ||
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makeLens ''App | ||
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instance HasHeist App where | ||
heistLens = subSnaplet heist | ||
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------------------------------------------------------------------------------ | ||
type AppHandler = Handler App App | ||
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{-# LANGUAGE CPP #-} | ||
{-# LANGUAGE TemplateHaskell #-} | ||
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module Main where | ||
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------------------------------------------------------------------------------ | ||
import Control.Exception (SomeException, try) | ||
import qualified Data.Text as T | ||
import Snap.Http.Server | ||
import Snap.Snaplet | ||
import Snap.Snaplet.Config | ||
import Snap.Core | ||
import System.IO | ||
import Site | ||
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#ifdef DEVELOPMENT | ||
import Snap.Loader.Dynamic | ||
#else | ||
import Snap.Loader.Static | ||
#endif | ||
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------------------------------------------------------------------------------ | ||
-- | This is the entry point for this web server application. It supports | ||
-- easily switching between interpreting source and running statically compiled | ||
-- code. | ||
-- | ||
-- In either mode, the generated program should be run from the root of the | ||
-- project tree. When it is run, it locates its templates, static content, and | ||
-- source files in development mode, relative to the current working directory. | ||
-- | ||
-- When compiled with the development flag, only changes to the libraries, your | ||
-- cabal file, or this file should require a recompile to be picked up. | ||
-- Everything else is interpreted at runtime. There are a few consequences of | ||
-- this. | ||
-- | ||
-- First, this is much slower. Running the interpreter takes a significant | ||
-- chunk of time (a couple tenths of a second on the author's machine, at this | ||
-- time), regardless of the simplicity of the loaded code. In order to | ||
-- recompile and re-load server state as infrequently as possible, the source | ||
-- directories are watched for updates, as are any extra directories specified | ||
-- below. | ||
-- | ||
-- Second, the generated server binary is MUCH larger, since it links in the | ||
-- GHC API (via the hint library). | ||
-- | ||
-- Third, and the reason you would ever want to actually compile with | ||
-- development mode, is that it enables a faster development cycle. You can | ||
-- simply edit a file, save your changes, and hit reload to see your changes | ||
-- reflected immediately. | ||
-- | ||
-- When this is compiled without the development flag, all the actions are | ||
-- statically compiled in. This results in faster execution, a smaller binary | ||
-- size, and having to recompile the server for any code change. | ||
-- | ||
main :: IO () | ||
main = do | ||
-- Depending on the version of loadSnapTH in scope, this either enables | ||
-- dynamic reloading, or compiles it without. The last argument to | ||
-- loadSnapTH is a list of additional directories to watch for changes to | ||
-- trigger reloads in development mode. It doesn't need to include source | ||
-- directories, those are picked up automatically by the splice. | ||
(conf, site, cleanup) <- $(loadSnapTH [| getConf |] | ||
'getActions | ||
["snaplets/heist/templates"]) | ||
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_ <- try $ httpServe conf site :: IO (Either SomeException ()) | ||
cleanup | ||
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------------------------------------------------------------------------------ | ||
-- | This action loads the config used by this application. The loaded config | ||
-- is returned as the first element of the tuple produced by the loadSnapTH | ||
-- Splice. The type is not solidly fixed, though it must be an IO action that | ||
-- produces the same type as 'getActions' takes. It also must be an instance of | ||
-- Typeable. If the type of this is changed, a full recompile will be needed to | ||
-- pick up the change, even in development mode. | ||
-- | ||
-- This action is only run once, regardless of whether development or | ||
-- production mode is in use. | ||
getConf :: IO (Config Snap AppConfig) | ||
getConf = commandLineAppConfig defaultConfig | ||
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------------------------------------------------------------------------------ | ||
-- | This function generates the the site handler and cleanup action from the | ||
-- configuration. In production mode, this action is only run once. In | ||
-- development mode, this action is run whenever the application is reloaded. | ||
-- | ||
-- Development mode also makes sure that the cleanup actions are run | ||
-- appropriately before shutdown. The cleanup action returned from loadSnapTH | ||
-- should still be used after the server has stopped handling requests, as the | ||
-- cleanup actions are only automatically run when a reload is triggered. | ||
-- | ||
-- This sample doesn't actually use the config passed in, but more | ||
-- sophisticated code might. | ||
getActions :: Config Snap AppConfig -> IO (Snap (), IO ()) | ||
getActions conf = do | ||
(msgs, site, cleanup) <- runSnaplet | ||
(appEnvironment =<< getOther conf) app | ||
hPutStrLn stderr $ T.unpack msgs | ||
return (site, cleanup) |
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{-# LANGUAGE OverloadedStrings #-} | ||
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------------------------------------------------------------------------------ | ||
-- | This module is where all the routes and handlers are defined for your | ||
-- site. The 'app' function is the initializer that combines everything | ||
-- together and is exported by this module. | ||
module Site | ||
( app | ||
) where | ||
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------------------------------------------------------------------------------ | ||
import Control.Applicative | ||
import Data.ByteString (ByteString) | ||
import Data.Maybe | ||
import qualified Data.Text as T | ||
import Snap.Core | ||
import Snap.Snaplet | ||
import Snap.Snaplet.Heist | ||
import Snap.Snaplet.Fay | ||
import Snap.Util.FileServe | ||
import Text.Templating.Heist | ||
------------------------------------------------------------------------------ | ||
import Application | ||
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------------------------------------------------------------------------------ | ||
-- | The application's routes. | ||
routes :: [(ByteString, Handler App App ())] | ||
routes = [ ("fay", with fay fayServe) | ||
, ("", serveDirectory "static") | ||
] | ||
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------------------------------------------------------------------------------ | ||
-- | The application initializer. | ||
app :: SnapletInit App App | ||
app = makeSnaplet "app" "An snaplet example application." Nothing $ do | ||
h <- nestSnaplet "" heist $ heistInit "templates" | ||
f <- nestSnaplet "fay" fay $ initFay | ||
addRoutes routes | ||
return $ App h f |
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html { | ||
padding: 0; | ||
margin: 0; | ||
background-color: #ffffff; | ||
font-family: Verdana, Helvetica, sans-serif; | ||
} | ||
body { | ||
padding: 0; | ||
margin: 0; | ||
} | ||
a { | ||
text-decoration: underline; | ||
} | ||
a :hover { | ||
cursor: pointer; | ||
text-decoration: underline; | ||
} | ||
img { | ||
border: none; | ||
} | ||
#content { | ||
padding-left: 1em; | ||
} | ||
#info { | ||
font-size: 60%; | ||
} |