diff --git a/ChangeLog.md b/ChangeLog.md
new file mode 100644
--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,5 @@
+# Revision history for http-pony-transformer-startline
+
+## 0.1.0.0  -- 2016-09-22
+
+* First version. Released on an unsuspecting world.
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) 2016, Jinjing Wang
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Jinjing Wang nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/http-pony-transformer-startline.cabal b/http-pony-transformer-startline.cabal
new file mode 100644
--- /dev/null
+++ b/http-pony-transformer-startline.cabal
@@ -0,0 +1,33 @@
+-- Initial http-pony-transformer-startline.cabal generated by cabal init.  
+-- For further documentation, see http://haskell.org/cabal/users-guide/
+
+name:                http-pony-transformer-startline
+version:             0.1.0.0
+synopsis:            transform HTTP startlines to tuples
+-- description:         
+license:             BSD3
+license-file:        LICENSE
+author:              Jinjing Wang
+maintainer:          nfjinjing@gmail.com
+-- copyright:           
+category:            Network
+build-type:          Simple
+extra-source-files:  ChangeLog.md
+cabal-version:       >=1.10
+
+library
+  exposed-modules:     Network.HTTP.Pony.Transformer.StartLine
+                     , Network.HTTP.Pony.Transformer.StartLine.Type
+                     , Network.HTTP.Pony.Transformer.StartLine.Parser
+                     , Network.HTTP.Pony.Transformer.StartLine.Builder
+  -- other-modules:       
+  -- other-extensions:    FlexibleContexts, OverloadedStrings
+
+  build-depends:       base >=4.9 && <4.10
+                     , attoparsec >=0.13
+                     , bytestring >=0.10
+                     , http-types >= 0.9.1
+                     , lens >= 4.14
+
+  hs-source-dirs:      src
+  default-language:    Haskell2010
diff --git a/src/Network/HTTP/Pony/Transformer/StartLine.hs b/src/Network/HTTP/Pony/Transformer/StartLine.hs
new file mode 100644
--- /dev/null
+++ b/src/Network/HTTP/Pony/Transformer/StartLine.hs
@@ -0,0 +1,42 @@
+-- |
+
+{-# LANGUAGE FlexibleContexts #-}
+
+module Network.HTTP.Pony.Transformer.StartLine where
+
+import Control.Lens (over, ASetter, _1, _2, view
+                     , Field1, Field2, set, Getting)
+import           Data.Attoparsec.ByteString (parse, eitherResult)
+import           Data.ByteString (ByteString)
+import qualified Network.HTTP.Types as HTTP
+
+import qualified Network.HTTP.Pony.Transformer.StartLine.Builder as Builder
+import qualified Network.HTTP.Pony.Transformer.StartLine.Parser as Parser
+import           Network.HTTP.Pony.Transformer.StartLine.Type (RequestURI, RequestLine, ResponseLine)
+
+
+-- Here f and f' should really be the same Lens from the Request into the StartLine
+startLineWith :: (Monoid a, Monad f)  => Getting ByteString s ByteString
+                                      -> ASetter s t a1 RequestLine
+                                      -> ASetter s1 a ResponseLine ByteString
+                                      -> (t -> f s1)
+                                      -> s
+                                      -> f a
+startLineWith f f' g app request = do
+  let requestLine = view f request
+  case eitherResult (parse Parser.requestLineTokens requestLine) of
+    Left _ -> pure mempty
+    Right r -> do
+      response <- app (set f' r request)
+      pure (over g Builder.response response)
+
+
+startLine :: ( Field1 s3 b2 ByteString ByteString
+             , Field1 s3 b ByteString (HTTP.Method, RequestURI, HTTP.HttpVersion)
+             , Field1 s2 b1 ResponseLine ByteString
+             , Field1 s1 a s2 b1
+             , Field1 s s s3 b2
+             , Field1 s t s3 b
+             , Monoid a
+             , Monad f) => (t -> f s1) -> s -> f a
+startLine = startLineWith (_1 . _1) (_1 . _1) (_1 . _1)
diff --git a/src/Network/HTTP/Pony/Transformer/StartLine/Builder.hs b/src/Network/HTTP/Pony/Transformer/StartLine/Builder.hs
new file mode 100644
--- /dev/null
+++ b/src/Network/HTTP/Pony/Transformer/StartLine/Builder.hs
@@ -0,0 +1,18 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Network.HTTP.Pony.Transformer.StartLine.Builder where
+
+import qualified Network.HTTP.Types as HTTP
+import qualified Data.ByteString.Char8 as B
+import Data.ByteString (ByteString)
+import Data.Semigroup ((<>))
+
+import Network.HTTP.Pony.Transformer.StartLine.Type (ResponseLine)
+
+response :: ResponseLine -> ByteString
+response (version, (HTTP.Status code message)) =
+                                              B.pack (show version)
+                                                <> " "
+                                                <> B.pack (show code)
+                                                <> " "
+                                                <> message
diff --git a/src/Network/HTTP/Pony/Transformer/StartLine/Parser.hs b/src/Network/HTTP/Pony/Transformer/StartLine/Parser.hs
new file mode 100644
--- /dev/null
+++ b/src/Network/HTTP/Pony/Transformer/StartLine/Parser.hs
@@ -0,0 +1,31 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Network.HTTP.Pony.Transformer.StartLine.Parser where
+
+
+import           Data.Attoparsec.ByteString (Parser)
+import qualified Data.Attoparsec.ByteString.Char8 as Char
+import           Data.ByteString.Char8 (ByteString)
+import qualified Data.ByteString.Char8 as B
+import           Data.Char (ord)
+import qualified Network.HTTP.Types as HTTP
+
+import Network.HTTP.Pony.Transformer.StartLine.Type (RequestLine)
+
+requestLineTokens :: Parser RequestLine
+requestLineTokens = do
+  method <- Char.takeTill (== ' ')
+  Char.char ' '
+  requestURI <- Char.takeTill (== ' ')
+  Char.char ' '
+  Char.string "HTTP/"
+
+  let minusZero = (+) (- ord '0')
+      charToInt = minusZero . ord
+      digit = fmap charToInt Char.digit
+
+  major <- digit
+  Char.char '.'
+  minor <- digit
+
+  pure (method, requestURI, HTTP.HttpVersion major minor)
diff --git a/src/Network/HTTP/Pony/Transformer/StartLine/Type.hs b/src/Network/HTTP/Pony/Transformer/StartLine/Type.hs
new file mode 100644
--- /dev/null
+++ b/src/Network/HTTP/Pony/Transformer/StartLine/Type.hs
@@ -0,0 +1,11 @@
+-- | 
+
+module Network.HTTP.Pony.Transformer.StartLine.Type where
+
+import Data.ByteString (ByteString)
+import qualified Network.HTTP.Types as HTTP
+
+type RequestURI = ByteString
+
+type RequestLine = (HTTP.Method, RequestURI, HTTP.HttpVersion)
+type ResponseLine = (HTTP.HttpVersion, HTTP.Status)