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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE OverloadedStrings #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE FlexibleContexts #-}</span>
<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>HTTP</span><span class='hs-varop'>.</span><span class='hs-conid'>Conduit</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span>
<a name="line-4"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>sinkHeaders</span>
<a name="line-5"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>take</span><span class='hs-layout'>,</span> <span class='hs-varid'>takeWhile</span><span class='hs-layout'>)</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span>
<a name="line-9"></a>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>S</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>S8</span>
<a name="line-12"></a>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Conduit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sink</span><span class='hs-layout'>,</span> <span class='hs-conid'>MonadThrow</span> <span class='hs-layout'>(</span><span class='hs-varid'>monadThrow</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>=$</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>when</span><span class='hs-layout'>,</span> <span class='hs-varid'>unless</span><span class='hs-layout'>)</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>HTTP</span><span class='hs-varop'>.</span><span class='hs-conid'>Conduit</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span><span class='hs-conid'>HttpException</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Conduit</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>CB</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Conduit</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>CL</span>
<a name="line-18"></a>
<a name="line-19"></a>
<a name="line-20"></a><a name="Header"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Header</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>,</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-21"></a><a name="Status"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Status</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-22"></a>
<a name="line-23"></a><a name="sinkHeaders"></a><span class='hs-comment'>-- | New version of @sinkHeaders@ that doesn't use attoparsec. Should create</span>
<a name="line-24"></a><span class='hs-comment'>-- more meaningful exceptions.</span>
<a name="line-25"></a><span class='hs-comment'>--</span>
<a name="line-26"></a><span class='hs-comment'>-- Since 1.8.7</span>
<a name="line-27"></a><span class='hs-definition'>sinkHeaders</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MonadThrow</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Sink</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Status</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Header</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-28"></a><span class='hs-definition'>sinkHeaders</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-29"></a> <span class='hs-varid'>status</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getStatusLine</span>
<a name="line-30"></a> <span class='hs-varid'>headers</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseHeaders</span> <span class='hs-varid'>id</span>
<a name="line-31"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>status</span><span class='hs-layout'>,</span> <span class='hs-varid'>headers</span><span class='hs-layout'>)</span>
<a name="line-32"></a> <span class='hs-keyword'>where</span>
<a name="line-33"></a> <span class='hs-varid'>getStatusLine</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-34"></a> <span class='hs-comment'>-- Ensure that there is some data coming in. If not, we want to signal</span>
<a name="line-35"></a> <span class='hs-comment'>-- this as a connection problem and not a protocol problem.</span>
<a name="line-36"></a> <span class='hs-varid'>mx</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>CL</span><span class='hs-varop'>.</span><span class='hs-varid'>peek</span>
<a name="line-37"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mx</span> <span class='hs-keyword'>of</span>
<a name="line-38"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>monadThrow</span> <span class='hs-conid'>NoResponseDataReceived</span>
<a name="line-39"></a> <span class='hs-conid'>Just</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-40"></a>
<a name="line-41"></a> <span class='hs-varid'>status</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>code</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>sinkLine</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>parseStatus</span>
<a name="line-42"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>code</span> <span class='hs-varop'>==</span> <span class='hs-num'>100</span>
<a name="line-43"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>newline</span> <span class='hs-conid'>ExpectedBlankAfter100Continue</span> <span class='hs-varop'>>></span> <span class='hs-varid'>getStatusLine</span>
<a name="line-44"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>status</span>
<a name="line-45"></a>
<a name="line-46"></a> <span class='hs-varid'>newline</span> <span class='hs-varid'>exc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-47"></a> <span class='hs-varid'>line</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>sinkLine</span>
<a name="line-48"></a> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>line</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>monadThrow</span> <span class='hs-varid'>exc</span>
<a name="line-49"></a>
<a name="line-50"></a> <span class='hs-varid'>sinkLine</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-51"></a> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>killCR</span> <span class='hs-varop'>.</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>concat</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-conid'>CB</span><span class='hs-varop'>.</span><span class='hs-varid'>takeWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-varid'>charLF</span><span class='hs-layout'>)</span> <span class='hs-varop'>=$</span> <span class='hs-conid'>CL</span><span class='hs-varop'>.</span><span class='hs-varid'>consume</span>
<a name="line-52"></a> <span class='hs-conid'>CB</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-num'>1</span>
<a name="line-53"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>bs</span>
<a name="line-54"></a> <span class='hs-varid'>charLF</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>10</span>
<a name="line-55"></a> <span class='hs-varid'>charCR</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>13</span>
<a name="line-56"></a> <span class='hs-varid'>charSpace</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>32</span>
<a name="line-57"></a> <span class='hs-varid'>charColon</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>58</span>
<a name="line-58"></a> <span class='hs-varid'>killCR</span> <span class='hs-varid'>bs</span>
<a name="line-59"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bs</span>
<a name="line-60"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>last</span> <span class='hs-varid'>bs</span> <span class='hs-varop'>==</span> <span class='hs-varid'>charCR</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>init</span> <span class='hs-varid'>bs</span>
<a name="line-61"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bs</span>
<a name="line-62"></a>
<a name="line-63"></a> <span class='hs-varid'>parseStatus</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadThrow</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>Status</span>
<a name="line-64"></a> <span class='hs-varid'>parseStatus</span> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-65"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>ver</span><span class='hs-layout'>,</span> <span class='hs-varid'>bs2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>breakByte</span> <span class='hs-varid'>charSpace</span> <span class='hs-varid'>bs</span>
<a name="line-66"></a> <span class='hs-layout'>(</span><span class='hs-varid'>code</span><span class='hs-layout'>,</span> <span class='hs-varid'>bs3</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>breakByte</span> <span class='hs-varid'>charSpace</span> <span class='hs-varop'>$</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>charSpace</span><span class='hs-layout'>)</span> <span class='hs-varid'>bs2</span>
<a name="line-67"></a> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>charSpace</span><span class='hs-layout'>)</span> <span class='hs-varid'>bs3</span>
<a name="line-68"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>(,)</span> <span class='hs-varop'><$></span> <span class='hs-varid'>parseVersion</span> <span class='hs-varid'>ver</span> <span class='hs-varop'><*></span> <span class='hs-varid'>parseCode</span> <span class='hs-varid'>code</span> <span class='hs-keyword'>of</span>
<a name="line-69"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>ver'</span><span class='hs-layout'>,</span> <span class='hs-varid'>code'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>ver'</span><span class='hs-layout'>,</span> <span class='hs-varid'>code'</span><span class='hs-layout'>,</span> <span class='hs-varid'>msg</span><span class='hs-layout'>)</span>
<a name="line-70"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>monadThrow</span> <span class='hs-varop'>$</span> <span class='hs-conid'>InvalidStatusLine</span> <span class='hs-varid'>bs</span>
<a name="line-71"></a>
<a name="line-72"></a> <span class='hs-varid'>stripPrefixBS</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-73"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>isPrefixOf</span><span class='hs-varop'>`</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span>
<a name="line-74"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-75"></a> <span class='hs-varid'>parseVersion</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>stripPrefixBS</span> <span class='hs-str'>"HTTP/"</span>
<a name="line-76"></a> <span class='hs-varid'>parseCode</span> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>=</span>
<a name="line-77"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>S8</span><span class='hs-varop'>.</span><span class='hs-varid'>readInt</span> <span class='hs-varid'>bs</span> <span class='hs-keyword'>of</span>
<a name="line-78"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varid'>i</span>
<a name="line-79"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-80"></a>
<a name="line-81"></a> <span class='hs-varid'>parseHeaders</span> <span class='hs-varid'>front</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-82"></a> <span class='hs-varid'>line</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>sinkLine</span>
<a name="line-83"></a> <span class='hs-keyword'>if</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>line</span>
<a name="line-84"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>front</span> <span class='hs-conid'>[]</span>
<a name="line-85"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-86"></a> <span class='hs-varid'>header</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseHeader</span> <span class='hs-varid'>line</span>
<a name="line-87"></a> <span class='hs-varid'>parseHeaders</span> <span class='hs-varop'>$</span> <span class='hs-varid'>front</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>header</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span>
<a name="line-88"></a>
<a name="line-89"></a> <span class='hs-varid'>parseHeader</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadThrow</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>Header</span>
<a name="line-90"></a> <span class='hs-varid'>parseHeader</span> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-91"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>key</span><span class='hs-layout'>,</span> <span class='hs-varid'>bs2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>breakByte</span> <span class='hs-varid'>charColon</span> <span class='hs-varid'>bs</span>
<a name="line-92"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>bs2</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>monadThrow</span> <span class='hs-varop'>$</span> <span class='hs-conid'>InvalidHeader</span> <span class='hs-varid'>bs</span>
<a name="line-93"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>strip</span> <span class='hs-varid'>key</span><span class='hs-layout'>,</span> <span class='hs-varid'>strip</span> <span class='hs-varop'>$</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-num'>1</span> <span class='hs-varid'>bs2</span><span class='hs-layout'>)</span>
<a name="line-94"></a>
<a name="line-95"></a> <span class='hs-varid'>strip</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>charSpace</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>.</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>spanEnd</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>charSpace</span><span class='hs-layout'>)</span>
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