在Network.http.conduit中禁用SSL/TLS证书验证

Question

i使用http-conduit库2.0 从http:// URL获取内容：

import Network.HTTP.Conduit
myurl = ... -- Your URL goes here
main = do content <- simpleHttp myurl
          print $ content

运行此程序时，我会收到此错误：

*** Exception: TlsException (HandshakeFailed (Error_Protocol
      ("certificate rejected: certificate is not allowed to sign another certificate",
        True,CertificateUnknown)))

从错误消息中可以看出，问题是Network.HTTP.Conduit无法适当验证服务器证书（在这种情况下，证书链中似乎存在问题）

如何更改上述代码以忽略证书错误（即根本不验证证书）？

Answer 1

simpleHttp本身不支持此功能。您需要使用修改后的ManagerSettings创建一个经理，然后使用它来获取URL。

请注意，此代码仅适用于http-conduits版本2.0 - 为此目的，库版本1具有相似但不同的API。

import Network.HTTP.Conduit
import Network.Connection
import qualified Data.ByteString.Lazy.Char8 as LB
myurl = ... -- Your URL goes here
-- | Get a new Manager that doesn't verify SSL certificates
noSSLVerifyManager :: IO Manager
noSSLVerifyManager = let tlsSettings = TLSSettingsSimple {
                            -- This is where we disable certificate verification
                            settingDisableCertificateValidation = True,
                            settingDisableSession=False,
                            settingUseServerName=True}
                     in newManager $ mkManagerSettings tlsSettings Nothing
-- | Download like with simpleHttp, but using an existing manager for the task
simpleHttpWithManager :: Manager -> String -> IO LB.ByteString
simpleHttpWithManager manager url = do url' <- parseUrl url
                                       fmap responseBody $ httpLbs url' manager
main = do manager <- noSSLVerifyManager
          content <- simpleHttpWithManager manager myurl
          print $ content

请注意，如果绝对必要，则只能禁用SSL证书验证，因为它使您容易受到Man-In-Middle攻击