Run a Twain app on Port using the given environment.

If a PORT environment variable is set, it will take precendence.

twain 8080 "My App" $ do
  middleware logger
  get "/" $ do
    appTitle <- env
    send $ text ("Hello from " <> appTitle)
  get "/greetings/:name"
    name <- param "name"
    send $ text ("Hello, " <> name)
  notFound $ do
    send $ status status404 $ text "Not Found"

Run a Twain app passing Warp Settings.

Create a WAI Application from a Twain app and environment.

Use the given middleware. The first declared is the outermost middleware (it has first access to request and last action on response).

Add a route if nothing else is found. This matches any request, so it should go last.

Render a Response on exceptions.

Add a route matching Method (optional) and PathPattern.

Get the app environment.

Get a parameter. Looks in query, path, cookie, and body (in that order).

If no parameter is found, or parameter fails to parse, next is called which passes control to subsequent routes and middleware.

Get a parameter or error if missing or parse failure.

Get an optional parameter. Nothing is returned for missing parameter or parse failure.

Get all parameters from query, path, cookie, and body (in that order).

Get uploaded FileInfo.

Get all uploaded files.

Get the value of a request Header. Header names are case-insensitive.

Get the request headers.

Get the WAI Request.

Send a Response.

send $ text "Hello, World!"

Send an html response:

send $ html "<h1>Hello, World!</h1>"

Modify the status:

send $ status status404 $ text "Not Found"

Send a response withHeader:

send $ withHeader (hServer, "Twain + Warp") $ text "Hello"

Send a response withCookie:

send $ withCookie "key" "val" $ text "Hello"

Pass control to the next route or middleware.

Create a redirect response with 301 status (Moved Permanently).

Create a redirect response with 302 status (Found).

Create a redirect response 303 status (See Other).

Construct a Text response.

Sets the Content-Type and Content-Length headers.

Construct an HTML response.

Sets the Content-Type and Content-Length headers.

Construct a JSON response using ToJSON.

Sets the Content-Type and Content-Length headers.

Construct an XML response.

Sets the Content-Type and Content-Length headers.

Construct a raw response from a lazy ByteString.

Set the Status for a Response.

Add a Header to response.

Add a cookie to the response with the given key and value.

Note: This uses defaultSetCookie.

Add a SetCookie to the response.

Add a header to expire (unset) a cookie with the given key.