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Add basic auth example to pokedex deployment.
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examples/pokedex/app/Page/BasicAuth.elm
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134
examples/pokedex/app/Page/BasicAuth.elm
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module Page.BasicAuth exposing (Data, Model, Msg, page)
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import Base64
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import DataSource exposing (DataSource)
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import Head
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import Html exposing (div, text)
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import Page exposing (Page, PageWithState, StaticPayload)
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import Pages.PageUrl exposing (PageUrl)
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import Server.Request as Request exposing (Request)
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import Server.Response as Response exposing (Response)
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import Shared
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import View exposing (View)
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type alias Model =
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{}
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type alias Msg =
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()
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type alias RouteParams =
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{}
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page : Page RouteParams Data
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page =
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Page.serverRender
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{ head = head
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, data = data
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}
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|> Page.buildNoState { view = view }
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type alias Data =
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{ greeting : String
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}
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data : RouteParams -> Request (DataSource (Response Data))
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data routeParams =
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withBasicAuth
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(\{ username, password } ->
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(username == "asdf" && password == "qwer")
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|> DataSource.succeed
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)
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(Data "Login success!"
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|> Response.render
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|> DataSource.succeed
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)
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head :
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StaticPayload Data RouteParams
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-> List Head.Tag
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head static =
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[]
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view :
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Maybe PageUrl
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-> Shared.Model
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-> StaticPayload Data RouteParams
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-> View Msg
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view maybeUrl sharedModel static =
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{ title = "Basic Auth Test"
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, body =
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[ text "Basic Auth Test"
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, div []
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[ text static.data.greeting
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]
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]
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}
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parseAuth : String -> Maybe { username : String, password : String }
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parseAuth base64Auth =
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case
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base64Auth
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|> String.dropLeft 6
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|> Base64.toString
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|> Maybe.map (String.split ":")
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of
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Just [ username, password ] ->
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Just
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{ username = username
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, password = password
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}
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_ ->
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Nothing
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withBasicAuth :
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({ username : String, password : String } -> DataSource Bool)
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-> DataSource (Response data)
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-> Request (DataSource (Response data))
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withBasicAuth checkAuth successResponse =
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Request.oneOf
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[ Request.expectHeader "authorization"
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|> Request.map
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(\base64Auth ->
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case parseAuth base64Auth of
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Just userPass ->
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checkAuth userPass
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|> DataSource.andThen
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(\authSucceeded ->
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if authSucceeded then
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successResponse
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else
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requireBasicAuth |> DataSource.succeed
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)
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Nothing ->
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requireBasicAuth
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|> DataSource.succeed
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)
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, requireBasicAuth
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|> DataSource.succeed
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|> Request.succeed
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]
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requireBasicAuth : Response data
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requireBasicAuth =
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Response.customResponse
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{ headers = []
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, body = Nothing
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, statusCode = 401
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, isBase64Encoded = False
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}
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|> Response.withHeader "WWW-Authenticate" "Basic"
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