如何从浏览器将文件上传到我的网络服务器?服务器是用 Haskell 编写的,使用 Scotty。这是我尝试过的:
服务器:
{-# LANGUAGE OverloadedStrings #-}
module Main where
import qualified Data.ByteString.Lazy as BL
import qualified Web.Scotty as Scot
import qualified Control.Monad.IO.Class as Cm
import qualified Data.Digest.Pure.SHA as Dps
dir :: String
dir = "/home/t/fileUpload/"
main :: IO ()
main =
Scot.scotty 3000 $ do
Scot.get "/" $ Scot.file $ dir ++ "index.html"
Scot.post "/upload" $ do
contents <- Scot.body
let fileName = Dps.showDigest $ Dps.sha256 contents
Cm.liftIO $ BL.writeFile (dir ++ fileName) contents
索引.html:
<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="utf-8">
</head>
<body>
<form enctype="multipart/form-data" action="/upload" method="post">
<input type="file"> <input type="submit" value="Submit"></form>
</body>
</html>
当我在浏览器中访问http://localhost:3000时,单击“浏览”按钮,选择一个文件,然后单击“提交”。然后它把我带到一个名为http://localhost:3000/upload的空白页面,一个文件被保存到“/home/t/fileUpload/somelonghash”。这很好,但问题是保存的文件只包含这样的内容:
-----------------------------172368540915173703481121109126--
这不是原始文件的内容。