Add protobuf parsing (et. al)
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25
format.proto
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25
format.proto
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@ -0,0 +1,25 @@
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syntax = "proto3";
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package AviaryFormat;
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enum Format {
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WEBP = 0;
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AVIF = 1;
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JPG = 2;
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PNG = 3;
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GIF = 4;
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}
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message Image {
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bytes key = 1;
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string full_url = 2;
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string thumb_url = 3;
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string blurhash = 4;
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Format format = 5;
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}
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message Index {
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repeated Image images = 1;
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optional string title = 2;
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optional string desc = 3;
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}
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11
spago.dhall
11
spago.dhall
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@ -13,18 +13,27 @@ to generate this file without the comments in this block.
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{ name = "my-project"
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, dependencies =
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[ "aff"
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, "arraybuffer-types"
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, "arraybuffer"
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, "arraybuffer-builder"
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, "arraybuffer-types"
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, "arrays"
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, "base64-codec"
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, "console"
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, "effect"
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, "either"
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, "exceptions"
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, "fetch"
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, "filterable"
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, "foldable-traversable"
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, "maybe"
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, "newtype"
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, "parsing"
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, "prelude"
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, "protobuf"
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, "strings"
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, "subtlecrypto"
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, "transformers"
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, "web-html"
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]
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, packages = ./packages.dhall
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, sources = [ "src/**/*.purs", "test/**/*.purs" ]
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@ -1,20 +1,33 @@
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module Main where
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import Prelude
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import AviaryFormat.Format (Format, Image, Index, parseIndex) as Format
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import Control.Monad.Error.Class (try)
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import Effect (Effect)
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import Effect.Aff (Aff, launchAff)
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import Effect.Class (liftEffect)
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import Effect.Console (log)
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import Effect.Exception (message)
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import Fetch (fetch)
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import Data.Array (head)
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import Data.Base64 (decodeBase64, fromString)
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import Data.Either (Either, note)
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import Data.Either (Either(..), hush, note)
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import Data.Maybe (Maybe(..))
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import Data.ArrayBuffer.Builder (execPut, putInt32be)
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import Data.Newtype (unwrap)
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import Data.ArrayBuffer.ArrayBuffer (byteLength)
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import Data.ArrayBuffer.Builder (execPut, putInt8)
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import Data.ArrayBuffer.Builder.Internal (toView)
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import Data.ArrayBuffer.DataView (buffer, whole)
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import Data.ArrayBuffer.Types (ArrayBuffer)
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import Data.Filterable (partitionMap)
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import Data.Foldable (traverse_)
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import Data.String (drop, indexOf', indexOf, splitAt)
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import Data.String.Pattern (Pattern(..))
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import Parsing (runParserT)
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import Web.HTML (window) as HTML
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import Web.HTML.Window (location)
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import Web.HTML.Location (hash, origin, pathname) as Location
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import Crypto.Subtle.Constants.AES (aesGCM, t128)
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import Crypto.Subtle.Encrypt (aesGCM, decrypt) as Alg
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@ -23,17 +36,35 @@ import Crypto.Subtle.Key.Import (importKey) as SC
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import Crypto.Subtle.Key.Types (CryptoKey, decrypt, raw)
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nonceE :: Effect ArrayBuffer
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nonceE = execPut $ traverse_ putInt32be [0xd0, 0xc3, 0x75, 0x56, 0x58, 0xc1, 0x7e, 0x5f, 0xd6, 0xcc, 0xb6, 0x76]
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nonceE = execPut $ traverse_ putInt8 [0xd0, 0xc3, 0x75, 0x56, 0x58, 0xc1, 0x7e, 0x5f, 0xd6, 0xcc, 0xb6, 0x76]
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data AviaryError
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= MalformedKey
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| MalformedUrl
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| DecryptFailed
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| StrangeIndex
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| IndexMissingField String
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type Image =
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{ key :: Aff CryptoKey
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, fullUrl :: String
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, thumbUrl :: String
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, blurhash :: String
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, format :: Format.Format
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}
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type Index =
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{ images :: Array Image
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, title :: Maybe String
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, desc :: Maybe String
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}
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instance showAviaryError :: Show AviaryError where
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show MalformedKey = "Malformed key!!"
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show MalformedUrl = "Malformed url!!"
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show DecryptFailed = "Either the data provided by the server was bad, or valid but incorrect key. Expiration likely."
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show StrangeIndex = "The gallery index matched with the provided key, but was in a strange format. This could indicate a severe version mismatch, or that the gallery was created by a malfunctioning client."
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show (IndexMissingField f) = "The gallery index was missing the crucial field " <> f <> ". This is almost certainly the result of a version mismatch or that the creator's client was not fully up-to-spec."
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type UrlInfo =
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{ server :: String
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@ -61,11 +92,61 @@ decryptBlob key cyphertext nonce =
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-- nonce <- makeAff (\_ -> nonceE)
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Alg.decrypt (Alg.aesGCM nonce Nothing (Just t128)) key cyphertext
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convertImageFromProtobuf :: Format.Image -> Either AviaryError Image
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convertImageFromProtobuf protoimage = let protoimage' = unwrap protoimage in do
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rawKey <- note (IndexMissingField "images[].key") protoimage'.key
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fullUrl <- note (IndexMissingField "images[].full_url") protoimage'.full_url
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thumbUrl <- note (IndexMissingField "images[].thumb_url") protoimage'.thumb_url
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blurhash <- note (IndexMissingField "images[].blurhash") protoimage'.blurhash
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format <- note (IndexMissingField "images[].format") protoimage'.format
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let key = SC.importKey raw (buffer $ toView $ unwrap rawKey) (aes aesGCM) false [decrypt]
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pure { key, fullUrl, thumbUrl, blurhash, format }
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convertIndexFromProtobuf :: Format.Index -> Either AviaryError Index
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convertIndexFromProtobuf protoindex =
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let protoindex' = unwrap protoindex in
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let {right: images, left: imagesErrors} = partitionMap convertImageFromProtobuf protoindex'.images
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in
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case head imagesErrors of
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Nothing ->
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Right
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{ images
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, title: protoindex'.title
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, desc: protoindex'.desc
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}
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Just err -> Left err
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parseIndex :: ArrayBuffer -> Effect (Either AviaryError Index)
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parseIndex rawData = do
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parseResult <- runParserT (whole rawData) (Format.parseIndex (byteLength rawData))
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pure $ convertIndexFromProtobuf =<< (note StrangeIndex $ hush parseResult)
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main_aff :: Aff Unit
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main_aff = do
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{ status, text } <- fetch "https://envs.sh/Q_V.txt" {}
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responseText <- text
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liftEffect $ log responseText
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urlInfo <- liftEffect do
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window <- HTML.window
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location <- location window
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keyB64 <- drop 1 <$> Location.hash location
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server <- Location.origin location
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fileId <- drop 1 <$> Location.pathname location
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nonce <- nonceE
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pure {keyB64, server, fileId, nonce}
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maybeIndex <- case decodeKey urlInfo.keyB64 of
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Left err -> pure $ Left err
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Right keyBuffer -> do
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cryptoKey <- importKey keyBuffer
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{ status, arrayBuffer } <- fetch (urlInfo.server <> "/" <> urlInfo.fileId <> ".bin") {}
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encryptedIndex <- arrayBuffer
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serializedIndex <- try $ decryptBlob cryptoKey encryptedIndex urlInfo.nonce
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case serializedIndex of
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Left err -> do
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_ <- liftEffect $ log $ message err
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pure $ Left $ DecryptFailed
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Right serializedIndex' -> do
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_ <- liftEffect $ log "BBBBBBBBB!"
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maybeIndex <- liftEffect $ parseIndex serializedIndex'
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pure ((\i -> i.title) <$> maybeIndex)
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liftEffect $ log $ show maybeIndex
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main :: Effect Unit
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main = launchAff main_aff $> unit
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185
src/format.AviaryFormat.purs
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185
src/format.AviaryFormat.purs
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@ -0,0 +1,185 @@
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-- | Generated by __purescript-protobuf__ from file `format.proto`
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module AviaryFormat.Format
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( Image(..), ImageRow, ImageR, parseImage, putImage, defaultImage, mkImage, mergeImage
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, Index(..), IndexRow, IndexR, parseIndex, putIndex, defaultIndex, mkIndex, mergeIndex
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, Format(..)
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)
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where
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import Protobuf.Internal.Prelude
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import Protobuf.Internal.Prelude as Prelude
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-- ---------- Message Image ----------
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newtype Image = Image ImageR
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type ImageRow =
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( key :: Prelude.Maybe Prelude.Bytes
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, full_url :: Prelude.Maybe String
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, thumb_url :: Prelude.Maybe String
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, blurhash :: Prelude.Maybe String
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, format :: Prelude.Maybe Format
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, __unknown_fields :: Array Prelude.UnknownField
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)
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type ImageR = Record ImageRow
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derive instance genericImage :: Prelude.Generic Image _
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derive instance newtypeImage :: Prelude.Newtype Image _
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derive instance eqImage :: Prelude.Eq Image
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instance showImage :: Prelude.Show Image where show x = Prelude.genericShow x
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putImage :: forall m. Prelude.MonadEffect m => Image -> Prelude.PutM m Prelude.Unit
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putImage (Image r) = do
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Prelude.putOptional 1 r.key Prelude.isDefault Prelude.encodeBytesField
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Prelude.putOptional 2 r.full_url Prelude.isDefault Prelude.encodeStringField
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Prelude.putOptional 3 r.thumb_url Prelude.isDefault Prelude.encodeStringField
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Prelude.putOptional 4 r.blurhash Prelude.isDefault Prelude.encodeStringField
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Prelude.putOptional 5 r.format Prelude.isDefault Prelude.putEnumField
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Prelude.traverse_ Prelude.putFieldUnknown r.__unknown_fields
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parseImage :: forall m. Prelude.MonadEffect m => Prelude.MonadRec m => Prelude.ByteLength -> Prelude.ParserT Prelude.DataView m Image
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parseImage length = Prelude.label "Image / " $
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Prelude.parseMessage Image defaultImage parseField length
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where
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parseField
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:: Prelude.FieldNumberInt
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-> Prelude.WireType
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-> Prelude.ParserT Prelude.DataView m (Prelude.Builder ImageR ImageR)
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parseField 1 Prelude.LenDel = Prelude.label "key / " $ do
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x <- Prelude.decodeBytes
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pure $ Prelude.modify (Prelude.Proxy :: Prelude.Proxy "key") $ \_ -> Prelude.Just x
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parseField 2 Prelude.LenDel = Prelude.label "full_url / " $ do
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x <- Prelude.decodeString
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pure $ Prelude.modify (Prelude.Proxy :: Prelude.Proxy "full_url") $ \_ -> Prelude.Just x
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parseField 3 Prelude.LenDel = Prelude.label "thumb_url / " $ do
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x <- Prelude.decodeString
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pure $ Prelude.modify (Prelude.Proxy :: Prelude.Proxy "thumb_url") $ \_ -> Prelude.Just x
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parseField 4 Prelude.LenDel = Prelude.label "blurhash / " $ do
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x <- Prelude.decodeString
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pure $ Prelude.modify (Prelude.Proxy :: Prelude.Proxy "blurhash") $ \_ -> Prelude.Just x
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parseField 5 Prelude.VarInt = Prelude.label "format / " $ do
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x <- Prelude.parseEnum
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pure $ Prelude.modify (Prelude.Proxy :: Prelude.Proxy "format") $ \_ -> Prelude.Just x
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parseField fieldNumber wireType = Prelude.parseFieldUnknown fieldNumber wireType
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defaultImage :: ImageR
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defaultImage =
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{ key: Prelude.Nothing
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, full_url: Prelude.Nothing
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, thumb_url: Prelude.Nothing
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, blurhash: Prelude.Nothing
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, format: Prelude.Nothing
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, __unknown_fields: []
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}
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mkImage :: forall r1 r3. Prelude.Union r1 ImageRow r3 => Prelude.Nub r3 ImageRow => Record r1 -> Image
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mkImage r = Image $ Prelude.merge r defaultImage
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mergeImage :: Image -> Image -> Image
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mergeImage (Image l) (Image r) = Image
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{ key: Prelude.alt l.key r.key
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, full_url: Prelude.alt l.full_url r.full_url
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, thumb_url: Prelude.alt l.thumb_url r.thumb_url
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, blurhash: Prelude.alt l.blurhash r.blurhash
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, format: Prelude.alt l.format r.format
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, __unknown_fields: r.__unknown_fields <> l.__unknown_fields
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}
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-- ---------- Message Index ----------
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newtype Index = Index IndexR
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type IndexRow =
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( images :: Array Image
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, title :: Prelude.Maybe String
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, desc :: Prelude.Maybe String
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, __unknown_fields :: Array Prelude.UnknownField
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)
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type IndexR = Record IndexRow
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derive instance genericIndex :: Prelude.Generic Index _
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derive instance newtypeIndex :: Prelude.Newtype Index _
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derive instance eqIndex :: Prelude.Eq Index
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instance showIndex :: Prelude.Show Index where show x = Prelude.genericShow x
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putIndex :: forall m. Prelude.MonadEffect m => Index -> Prelude.PutM m Prelude.Unit
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putIndex (Index r) = do
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Prelude.putRepeated 1 r.images $ Prelude.putLenDel putImage
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Prelude.putOptional 2 r.title (\_ -> false) Prelude.encodeStringField
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Prelude.putOptional 3 r.desc (\_ -> false) Prelude.encodeStringField
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Prelude.traverse_ Prelude.putFieldUnknown r.__unknown_fields
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parseIndex :: forall m. Prelude.MonadEffect m => Prelude.MonadRec m => Prelude.ByteLength -> Prelude.ParserT Prelude.DataView m Index
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parseIndex length = Prelude.label "Index / " $
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Prelude.parseMessage Index defaultIndex parseField length
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where
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parseField
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:: Prelude.FieldNumberInt
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-> Prelude.WireType
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-> Prelude.ParserT Prelude.DataView m (Prelude.Builder IndexR IndexR)
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parseField 1 Prelude.LenDel = Prelude.label "images / " $ do
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x <- Prelude.parseLenDel parseImage
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pure $ Prelude.modify (Prelude.Proxy :: Prelude.Proxy "images") $ Prelude.flip Prelude.snoc x
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parseField 2 Prelude.LenDel = Prelude.label "title / " $ do
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x <- Prelude.decodeString
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pure $ Prelude.modify (Prelude.Proxy :: Prelude.Proxy "title") $ \_ -> Prelude.Just x
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parseField 3 Prelude.LenDel = Prelude.label "desc / " $ do
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x <- Prelude.decodeString
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pure $ Prelude.modify (Prelude.Proxy :: Prelude.Proxy "desc") $ \_ -> Prelude.Just x
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parseField fieldNumber wireType = Prelude.parseFieldUnknown fieldNumber wireType
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defaultIndex :: IndexR
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defaultIndex =
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{ images: []
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, title: Prelude.Nothing
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, desc: Prelude.Nothing
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, __unknown_fields: []
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}
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mkIndex :: forall r1 r3. Prelude.Union r1 IndexRow r3 => Prelude.Nub r3 IndexRow => Record r1 -> Index
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mkIndex r = Index $ Prelude.merge r defaultIndex
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mergeIndex :: Index -> Index -> Index
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mergeIndex (Index l) (Index r) = Index
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{ images: r.images <> l.images
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, title: Prelude.alt l.title r.title
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, desc: Prelude.alt l.desc r.desc
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, __unknown_fields: r.__unknown_fields <> l.__unknown_fields
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}
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-- ---------- Enum Format ----------
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data Format
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= Format_WEBP
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| Format_AVIF
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| Format_JPG
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| Format_PNG
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| Format_GIF
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derive instance genericFormat :: Prelude.Generic Format _
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derive instance eqFormat :: Prelude.Eq Format
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instance showFormat :: Prelude.Show Format where show = Prelude.genericShow
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instance ordFormat :: Prelude.Ord Format where compare = Prelude.genericCompare
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instance boundedFormat :: Prelude.Bounded Format
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where
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bottom = Prelude.genericBottom
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top = Prelude.genericTop
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instance enumFormat :: Prelude.Enum Format
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where
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succ = Prelude.genericSucc
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pred = Prelude.genericPred
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instance boundedenumFormat :: Prelude.BoundedEnum Format
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where
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cardinality = Prelude.genericCardinality
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toEnum (0) = Prelude.Just Format_WEBP
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toEnum (1) = Prelude.Just Format_AVIF
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toEnum (2) = Prelude.Just Format_JPG
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toEnum (3) = Prelude.Just Format_PNG
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toEnum (4) = Prelude.Just Format_GIF
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toEnum _ = Prelude.Nothing
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fromEnum Format_WEBP = (0)
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fromEnum Format_AVIF = (1)
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fromEnum Format_JPG = (2)
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fromEnum Format_PNG = (3)
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fromEnum Format_GIF = (4)
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instance defaultFormat :: Prelude.Default Format
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where
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default = Format_WEBP
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isDefault = eq Format_WEBP
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