Fall back to internal url downloader when built without curl.
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4 changed files with 98 additions and 11 deletions
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@ -1,6 +1,6 @@
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{- Url downloading.
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-
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- Copyright 2011 Joey Hess <joey@kitenet.net>
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- Copyright 2011,2013 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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@ -17,6 +17,11 @@ module Utility.Url (
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import Common
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import Network.URI
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import qualified Network.Browser as Browser
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import Network.HTTP
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import Data.Either
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import qualified Build.SysConfig
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type URLString = String
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@ -32,7 +37,13 @@ check url headers expected_size = handle <$> exists url headers
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handle (True, s) = expected_size == s
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{- Checks that an url exists and could be successfully downloaded,
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- also returning its size if available. -}
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- also returning its size if available.
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-
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- For a file: url, check it directly.
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-
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- Uses curl otherwise, when available, since curl handles https better
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- than does Haskell's Network.Browser.
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-}
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exists :: URLString -> Headers -> IO (Bool, Maybe Integer)
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exists url headers = case parseURIRelaxed url of
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Just u
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@ -41,11 +52,17 @@ exists url headers = case parseURIRelaxed url of
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case s of
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Just stat -> return (True, Just $ fromIntegral $ fileSize stat)
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Nothing -> dne
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| otherwise -> do
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output <- readProcess "curl" curlparams
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case lastMaybe (lines output) of
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Just ('2':_:_) -> return (True, extractsize output)
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_ -> dne
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| otherwise -> if Build.SysConfig.curl
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then do
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output <- readProcess "curl" curlparams
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case lastMaybe (lines output) of
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Just ('2':_:_) -> return (True, extractsize output)
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_ -> dne
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else do
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r <- request u headers HEAD
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case rspCode r of
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(2,_,_) -> return (True, size r)
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_ -> return (False, Nothing)
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Nothing -> dne
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where
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dne = return (False, Nothing)
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@ -64,6 +81,8 @@ exists url headers = case parseURIRelaxed url of
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_ -> Nothing
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_ -> Nothing
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size = liftM Prelude.read . lookupHeader HdrContentLength . rspHeaders
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{- Used to download large files, such as the contents of keys.
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-
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- Uses wget or curl program for its progress bar. (Wget has a better one,
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@ -94,10 +113,63 @@ download url headers options file =
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go cmd opts = boolSystem cmd $
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options++opts++[File file, File url]
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{- Downloads a small file. -}
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{- Downloads a small file.
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-
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- Uses curl if available since it handles HTTPS better than
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- the Haskell libraries do. -}
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get :: URLString -> Headers -> IO String
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get url headers = readProcess "curl" $
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["-s", "-L", url] ++ concatMap (\h -> ["-H", h]) headers
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get url headers = if Build.SysConfig.curl
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then readProcess "curl" $
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["-s", "-L", url] ++ concatMap (\h -> ["-H", h]) headers
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else case parseURI url of
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Nothing -> error "url parse error"
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Just u -> do
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r <- request u headers GET
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case rspCode r of
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(2,_,_) -> return $ rspBody r
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_ -> error $ rspReason r
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{- Uses Network.Browser to make a http request of an url.
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- For example, HEAD can be used to check if the url exists,
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- or GET used to get the url content (best for small urls).
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-
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- This does its own redirect following because Browser's is buggy for HEAD
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- requests.
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-}
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request :: URI -> Headers -> RequestMethod -> IO (Response String)
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request url headers requesttype = go 5 url
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where
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go :: Int -> URI -> IO (Response String)
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go 0 _ = error "Too many redirects "
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go n u = do
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rsp <- Browser.browse $ do
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Browser.setErrHandler ignore
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Browser.setOutHandler ignore
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Browser.setAllowRedirects False
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let req = mkRequest requesttype u :: Request_String
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snd <$> Browser.request (addheaders req)
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case rspCode rsp of
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(3,0,x) | x /= 5 -> redir (n - 1) u rsp
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_ -> return rsp
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addheaders req = setHeaders req (rqHeaders req ++ userheaders)
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userheaders = rights $ map parseHeader headers
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ignore = const noop
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redir n u rsp = case retrieveHeaders HdrLocation rsp of
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[] -> return rsp
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(Header _ newu:_) ->
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case parseURIReference newu of
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Nothing -> return rsp
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Just newURI -> go n $
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#if defined VERSION_network
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#if ! MIN_VERSION_network(2,4,0)
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#define WITH_OLD_URI
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#endif
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#endif
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#ifdef WITH_OLD_URI
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fromMaybe newURI (newURI `relativeTo` u)
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#else
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newURI `relativeTo` u
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#endif
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{- Allows for spaces and other stuff in urls, properly escaping them. -}
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parseURIRelaxed :: URLString -> Maybe URI
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1
debian/changelog
vendored
1
debian/changelog
vendored
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@ -39,6 +39,7 @@ git-annex (4.20130406) UNRELEASED; urgency=low
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* webapp: Include the repository directory in the mangled hostname and
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ssh key name, so that a locked down ssh key for one repository is not
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re-used when setting up additional repositories on the same server.
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* Fall back to internal url downloader when built without curl.
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-- Joey Hess <joeyh@debian.org> Sat, 06 Apr 2013 15:24:15 -0400
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@ -30,3 +30,17 @@ I have tried other available version on Arch linux (AUR git-annex-bin, AUR git-a
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At that stage, what I would like to be able is to try to figure out what is going on using the log file.
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Thanks
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> This could happen when using the amd64 standalone build, because I
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> forgot to install curl into its chroot, so it was not included in the
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> bundle. If the host system also lacked curl, or something prevented
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> curl from working, it would fail like this.
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>
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> I've included curl into the amd64 standalone build. I've also made the
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> assistant fall back to using a built-in http client if it is built
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> without curl.
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>
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> None of which helps at all with the Arch git-annex-bin hack, since
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> that binary will be built with a working curl (when my amd64 standalone
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> builder builds it), and then installed onto a system, that,
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> apparently, has a broken curl. Which is one of many reasons I cannot
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> support that hack. [[done]] --[[Joey]]
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@ -66,7 +66,7 @@ Executable git-annex
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Main-Is: git-annex.hs
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Build-Depends: MissingH, hslogger, directory, filepath,
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unix, containers, utf8-string, network (>= 2.0), mtl (>= 2),
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bytestring, old-locale, time,
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bytestring, old-locale, time, HTTP,
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extensible-exceptions, dataenc, SHA, process, json,
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base (>= 4.5 && < 4.8), monad-control, transformers-base, lifted-base,
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IfElse, text, QuickCheck >= 2.1, bloomfilter, edit-distance, process,
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