A problem with network.curl and a possible solution
I'm using the code from the following blog as a template to create a session on a work server using ssl. To begin with, I am sticking with the example site github.com. I have noticed that the code that does a POST, does a GET request instead. I suspect this is a problem with the underlying libcurl. I have decided to test out another library, network.browser. If I get the same behavior, then I know I'm the one screwing up. If I get the right behavior, I will move over to network.browser. The problem is, I am having difficulty writing the same functionality with network.browser. I don't know how to "activate", or manage the cookie jar. And I don't know how to send data with a POST request. The url, and sample code are below. I would like a demonstration of how to accomplish the same this using Network.Browser. With the help of the blog example, Network.Curl is accessible enough , but I just can't get the POST request to work. http://flygdynamikern.blogspot.com/2009/03/extended-sessions-with-haskell-cu...
import Network.Curl import System (getArgs) import Text.Regex.Posix
-- | Standard options used for all requests. Uncomment the @CurlVerbose@ -- option for lots of info on STDOUT.
I like the verbose output, and the way the cookie jar is automagically made. I will manage the cookie jar if I have to, I just need to know how.
opts = [ CurlCookieJar "cookies" {- , CurlVerbose True -} ]
-- | Additional options to simulate submitting the login form. loginOptions user pass = CurlPostFields [ "login=" ++ user, "password=" ++ pass ] : method_POST
main = withCurlDo $ do -- Get username and password from command line arguments (will cause -- pattern match failure if incorrect number of args provided). [user, pass] <- getArgs
-- Initialize curl instance. curl <- initialize setopts curl opts
-- POST request to login. r <- do_curl_ curl "https://github.com/session" (loginOptions user pass) :: IO CurlResponse if respCurlCode r /= CurlOK || respStatus r /= 302 then error $ "Failed to log in: " ++ show (respCurlCode r) ++ " -- " ++ respStatusLine r else do -- GET request to fetch account page. r <- do_curl_ curl ("https://github.com/account") method_GET :: IO CurlResponse if respCurlCode r /= CurlOK || respStatus r /= 200 then error $ "Failed to retrieve account page: " ++ show (respCurlCode r) ++ " -- " ++ respStatusLine r else putStrLn $ extractToken $ respBody r -- | Extracts the token from GitHub account HTML page.
The code below is not important for my purposes,
extractToken body = head' "GitHub token not found" xs where head' msg l = if null l then error msg else head l (_,_,_,xs) = body =~ "github\\.token (.+)" :: (String, String, String,[String])
SOLVED
it was a problem with the example code, which I put here for other
hapless newbs.
change
CurlPostFields [ "login=" ++ user, "password=" ++ pass ] : method_POST
to
method_POST ++ [CurlPostFields [ "login=" ++ user, "password=" ++ pass ]]
Thanks to aristid from #freenode for the help.
I'm sticking with Network.Curl
On Fri, Oct 22, 2010 at 1:44 PM, Michael Litchard
I'm using the code from the following blog as a template to create a session on a work server using ssl. To begin with, I am sticking with the example site github.com. I have noticed that the code that does a POST, does a GET request instead. I suspect this is a problem with the underlying libcurl. I have decided to test out another library, network.browser. If I get the same behavior, then I know I'm the one screwing up. If I get the right behavior, I will move over to network.browser. The problem is, I am having difficulty writing the same functionality with network.browser. I don't know how to "activate", or manage the cookie jar. And I don't know how to send data with a POST request. The url, and sample code are below. I would like a demonstration of how to accomplish the same this using Network.Browser. With the help of the blog example, Network.Curl is accessible enough , but I just can't get the POST request to work.
http://flygdynamikern.blogspot.com/2009/03/extended-sessions-with-haskell-cu...
import Network.Curl import System (getArgs) import Text.Regex.Posix
-- | Standard options used for all requests. Uncomment the @CurlVerbose@ -- option for lots of info on STDOUT.
I like the verbose output, and the way the cookie jar is automagically made. I will manage the cookie jar if I have to, I just need to know how.
opts = [ CurlCookieJar "cookies" {- , CurlVerbose True -} ]
-- | Additional options to simulate submitting the login form. loginOptions user pass = CurlPostFields [ "login=" ++ user, "password=" ++ pass ] : method_POST
main = withCurlDo $ do -- Get username and password from command line arguments (will cause -- pattern match failure if incorrect number of args provided). [user, pass] <- getArgs
-- Initialize curl instance. curl <- initialize setopts curl opts
-- POST request to login. r <- do_curl_ curl "https://github.com/session" (loginOptions user pass) :: IO CurlResponse if respCurlCode r /= CurlOK || respStatus r /= 302 then error $ "Failed to log in: " ++ show (respCurlCode r) ++ " -- " ++ respStatusLine r else do -- GET request to fetch account page. r <- do_curl_ curl ("https://github.com/account") method_GET :: IO CurlResponse if respCurlCode r /= CurlOK || respStatus r /= 200 then error $ "Failed to retrieve account page: " ++ show (respCurlCode r) ++ " -- " ++ respStatusLine r else putStrLn $ extractToken $ respBody r -- | Extracts the token from GitHub account HTML page.
The code below is not important for my purposes,
extractToken body = head' "GitHub token not found" xs where head' msg l = if null l then error msg else head l (_,_,_,xs) = body =~ "github\\.token (.+)" :: (String, String, String,[String])
participants (1)
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Michael Litchard