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Modifying tensorflow-mnist-input-data's setup to download MNIST through http proxy if necessary

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Changing way to download MNIST dataset from Network.HTTP.simpleHTTP to Network.Browser.browse which allows to capture the environment's proxy.
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Your Name 2017-05-26 20:45:54 -05:00
parent 0603a6987b
commit 39c68862ab
1 changed files with 8 additions and 3 deletions
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11
tensorflow-mnist-input-data/Setup.hs
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@ -34,6 +34,7 @@ import System.Directory (doesFileExist)
import qualified Crypto.Hash as Hash
import qualified Data.ByteString.Lazy as B
import qualified Network.HTTP as HTTP
import qualified Network.Browser as Browser
import qualified Network.URI as URI
main :: IO ()
@ -65,9 +66,13 @@ httpDownload url outFile = do
let uri = fromMaybe
(error ("Can't be: invalid URI " ++ url))
(URI.parseURI url)
result <- HTTP.simpleHTTP (HTTP.defaultGETRequest_ uri)
HTTP.getResponseCode result >>= \case
(2, 0, 0) -> HTTP.getResponseBody result >>= B.writeFile outFile
(_, rsp)
<- Browser.browse $ do
Browser.setAllowRedirects True -- handle HTTP redirects
Browser.setCheckForProxy True -- detect proxy if setted
Browser.request $ HTTP.defaultGETRequest_ uri
case HTTP.rspCode rsp of
(2, 0, 0) -> B.writeFile outFile $ HTTP.rspBody rsp
s -> error ( "Failed to download " ++ url ++ " error code " ++ show s
++ helpfulMessage
)