hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-Parser-ProtocolHandlerHttpCurl.html
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<pre><a name="line-1"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-2"></a><span class='comment'>--</span>
<a name="line-3"></a><span class='comment'>-- protocol handler functions for native http access</span>
<a name="line-4"></a><span class='comment'>--</span>
<a name="line-5"></a><span class='comment'>-- Version : $Id: ProtocolHandlerHttpCurl.hs,v 1.3 2005/04/14 12:52:53 hxml Exp $</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Parser</span><span class='varop'>.</span><span class='conid'>ProtocolHandlerHttpCurl</span>
<a name="line-8"></a> <span class='layout'>(</span> <span class='varid'>getHttpContentsWithCurl</span>
<a name="line-9"></a> <span class='layout'>)</span>
<a name="line-10"></a>
<a name="line-11"></a><span class='keyword'>where</span>
<a name="line-12"></a>
<a name="line-13"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>XmlTree</span>
<a name="line-14"></a>
<a name="line-15"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>XmlState</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Parser</span><span class='varop'>.</span><span class='conid'>ProtocolHandlerUtil</span>
<a name="line-18"></a> <span class='layout'>(</span> <span class='varid'>parseContentType</span>
<a name="line-19"></a> <span class='layout'>)</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>ParserCombinators</span><span class='varop'>.</span><span class='conid'>Parsec</span>
<a name="line-22"></a> <span class='layout'>(</span> <span class='conid'>Parser</span>
<a name="line-23"></a> <span class='layout'>,</span> <span class='varid'>parse</span>
<a name="line-24"></a> <span class='layout'>,</span> <span class='varid'>anyChar</span>
<a name="line-25"></a> <span class='layout'>,</span> <span class='varid'>char</span>
<a name="line-26"></a> <span class='layout'>,</span> <span class='varid'>digit</span>
<a name="line-27"></a> <span class='layout'>,</span> <span class='varid'>getInput</span>
<a name="line-28"></a> <span class='layout'>,</span> <span class='varid'>many1</span>
<a name="line-29"></a> <span class='layout'>,</span> <span class='varid'>manyTill</span>
<a name="line-30"></a> <span class='layout'>,</span> <span class='varid'>spaces</span>
<a name="line-31"></a> <span class='layout'>,</span> <span class='varid'>string</span>
<a name="line-32"></a> <span class='layout'>,</span> <span class='layout'>(</span><span class='varop'><|></span><span class='layout'>)</span>
<a name="line-33"></a> <span class='layout'>)</span>
<a name="line-34"></a>
<a name="line-35"></a><span class='keyword'>import</span> <span class='keyword'>qualified</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>ParserCombinators</span><span class='varop'>.</span><span class='conid'>Parsec</span>
<a name="line-36"></a> <span class='layout'>(</span> <span class='varid'>try</span>
<a name="line-37"></a> <span class='layout'>)</span>
<a name="line-38"></a>
<a name="line-39"></a><span class='keyword'>import</span> <span class='conid'>Network</span><span class='varop'>.</span><span class='conid'>URI</span>
<a name="line-40"></a> <span class='layout'>(</span> <span class='conid'>URI</span>
<a name="line-41"></a> <span class='layout'>)</span>
<a name="line-42"></a>
<a name="line-43"></a><span class='keyword'>import</span> <span class='conid'>System</span><span class='varop'>.</span><span class='conid'>PipeOpen</span>
<a name="line-44"></a> <span class='layout'>(</span> <span class='varid'>popen</span>
<a name="line-45"></a> <span class='layout'>)</span>
<a name="line-46"></a>
<a name="line-47"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Char</span>
<a name="line-48"></a> <span class='layout'>(</span> <span class='varid'>toLower</span>
<a name="line-49"></a> <span class='layout'>)</span>
<a name="line-50"></a>
<a name="line-51"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-52"></a><span class='comment'>--</span>
<a name="line-53"></a><span class='comment'>-- the http protocol handler implemented by calling external program curl</span>
<a name="line-54"></a>
<a name="line-55"></a><a name="getHttpContentsWithCurl"></a><span class='definition'>getHttpContentsWithCurl</span> <span class='keyglyph'>::</span> <span class='conid'>URI</span> <span class='keyglyph'>-></span> <span class='conid'>XmlStateFilter</span> <span class='varid'>a</span>
<a name="line-56"></a><span class='definition'>getHttpContentsWithCurl</span> <span class='varid'>uri</span> <span class='varid'>n</span>
<a name="line-57"></a> <span class='keyglyph'>=</span> <span class='keyword'>do</span>
<a name="line-58"></a> <span class='varid'>trace</span> <span class='num'>2</span> <span class='layout'>(</span> <span class='str'>"getHttpContentWithCurl: reading from URL "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>uri</span> <span class='layout'>)</span>
<a name="line-59"></a>
<a name="line-60"></a> <span class='varid'>proxy</span> <span class='keyglyph'><-</span> <span class='varid'>getSysParam</span> <span class='varid'>a_proxy</span>
<a name="line-61"></a> <span class='varid'>curlOptions</span> <span class='keyglyph'><-</span> <span class='varid'>getSysParam</span> <span class='varid'>a_options_curl</span>
<a name="line-62"></a>
<a name="line-63"></a> <span class='keyword'>let</span> <span class='varid'>allArgs</span> <span class='keyglyph'>=</span> <span class='varid'>args</span> <span class='varop'>++</span> <span class='varid'>proxyArgs</span> <span class='varid'>proxy</span> <span class='varop'>++</span> <span class='varid'>words</span> <span class='varid'>curlOptions</span>
<a name="line-64"></a>
<a name="line-65"></a> <span class='varid'>trace</span> <span class='num'>4</span> <span class='layout'>(</span> <span class='str'>"getHttpContentWithCurl: running "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>unwords</span> <span class='layout'>(</span><span class='varid'>cmd</span> <span class='conop'>:</span> <span class='varid'>allArgs</span><span class='layout'>)</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-66"></a>
<a name="line-67"></a> <span class='layout'>(</span><span class='varid'>res</span><span class='layout'>,</span> <span class='varid'>errs</span><span class='layout'>,</span> <span class='varid'>rc</span><span class='layout'>)</span> <span class='keyglyph'><-</span> <span class='varid'>io</span> <span class='varop'>$</span> <span class='varid'>popen</span> <span class='varid'>cmd</span> <span class='varid'>allArgs</span>
<a name="line-68"></a>
<a name="line-69"></a> <span class='varid'>trace</span> <span class='num'>4</span> <span class='layout'>(</span> <span class='str'>"getHttpContentWithCurl: PID: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>rc</span> <span class='layout'>)</span>
<a name="line-70"></a> <span class='varid'>trace</span> <span class='num'>4</span> <span class='layout'>(</span> <span class='str'>"getHttpContentWithCurl: stdin: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>res</span> <span class='layout'>)</span>
<a name="line-71"></a> <span class='varid'>trace</span> <span class='num'>4</span> <span class='layout'>(</span> <span class='str'>"getHttpContentWithCurl: stderr: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>errs</span> <span class='layout'>)</span>
<a name="line-72"></a>
<a name="line-73"></a> <span class='keyword'>if</span> <span class='varid'>rc</span> <span class='varop'>/=</span> <span class='num'>0</span>
<a name="line-74"></a> <span class='keyword'>then</span> <span class='varid'>addFatal</span> <span class='layout'>(</span> <span class='str'>"http error when requesting URI (rc="</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>rc</span> <span class='varop'>++</span> <span class='str'>") "</span>
<a name="line-75"></a> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>uri</span>
<a name="line-76"></a> <span class='varop'>++</span> <span class='str'>": "</span>
<a name="line-77"></a> <span class='varop'>++</span> <span class='varid'>errs</span>
<a name="line-78"></a> <span class='layout'>)</span> <span class='varid'>n</span>
<a name="line-79"></a> <span class='keyword'>else</span> <span class='keyword'>let</span>
<a name="line-80"></a> <span class='layout'>(</span><span class='varid'>st</span><span class='layout'>,</span> <span class='varid'>al</span><span class='layout'>,</span> <span class='varid'>contents</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>parseResponse</span> <span class='varid'>res</span>
<a name="line-81"></a> <span class='keyword'>in</span>
<a name="line-82"></a> <span class='varid'>liftMf</span> <span class='layout'>(</span> <span class='varid'>addAttrl</span> <span class='layout'>(</span><span class='varid'>const</span> <span class='varid'>al</span><span class='layout'>)</span>
<a name="line-83"></a> <span class='varop'>.></span>
<a name="line-84"></a> <span class='varid'>replaceChildren</span> <span class='layout'>(</span><span class='varid'>xtext</span> <span class='varid'>contents</span><span class='layout'>)</span>
<a name="line-85"></a> <span class='layout'>)</span>
<a name="line-86"></a> <span class='varop'>.>></span> <span class='layout'>(</span> <span class='keyword'>if</span> <span class='varid'>st</span> <span class='varop'>>=</span> <span class='num'>200</span> <span class='varop'>&&</span> <span class='varid'>st</span> <span class='varop'><</span> <span class='num'>300</span>
<a name="line-87"></a> <span class='keyword'>then</span> <span class='varid'>thisM</span>
<a name="line-88"></a> <span class='keyword'>else</span>
<a name="line-89"></a> <span class='varid'>addFatal</span> <span class='layout'>(</span> <span class='str'>"http error when accessing URI "</span>
<a name="line-90"></a> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>uri</span>
<a name="line-91"></a> <span class='varop'>++</span> <span class='str'>": "</span>
<a name="line-92"></a> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>st</span>
<a name="line-93"></a> <span class='varop'>++</span> <span class='str'>" "</span>
<a name="line-94"></a> <span class='varop'>++</span> <span class='layout'>(</span><span class='varid'>valueOf</span> <span class='varid'>transferMessage</span> <span class='varop'>$</span> <span class='varid'>newRoot</span> <span class='varid'>al</span><span class='layout'>)</span>
<a name="line-95"></a> <span class='layout'>)</span>
<a name="line-96"></a> <span class='layout'>)</span>
<a name="line-97"></a> <span class='varop'>$</span> <span class='varid'>n</span>
<a name="line-98"></a> <span class='keyword'>where</span>
<a name="line-99"></a> <span class='varid'>cmd</span> <span class='keyglyph'>=</span> <span class='str'>"curl"</span>
<a name="line-100"></a> <span class='varid'>args</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span> <span class='str'>"--silent"</span>
<a name="line-101"></a> <span class='layout'>,</span> <span class='str'>"--show-error"</span>
<a name="line-102"></a> <span class='layout'>,</span> <span class='str'>"--dump-header"</span><span class='layout'>,</span> <span class='str'>"-"</span>
<a name="line-103"></a> <span class='layout'>,</span> <span class='varid'>show</span> <span class='varid'>uri</span>
<a name="line-104"></a> <span class='keyglyph'>]</span>
<a name="line-105"></a> <span class='varid'>proxyArgs</span> <span class='str'>""</span>
<a name="line-106"></a> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-107"></a> <span class='varid'>proxyArgs</span> <span class='varid'>prx</span>
<a name="line-108"></a> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span> <span class='str'>"--proxy"</span><span class='layout'>,</span> <span class='varid'>prx</span> <span class='keyglyph'>]</span>
<a name="line-109"></a>
<a name="line-110"></a><a name="parseResponse"></a><span class='definition'>parseResponse</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='conid'>Int</span><span class='layout'>,</span> <span class='conid'>XmlTrees</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span>
<a name="line-111"></a><span class='definition'>parseResponse</span> <span class='varid'>inp</span>
<a name="line-112"></a> <span class='keyglyph'>=</span> <span class='keyword'>case</span> <span class='layout'>(</span><span class='varid'>parse</span> <span class='varid'>parseHttpResponse</span> <span class='str'>"HTTP Header"</span> <span class='varid'>inp</span><span class='layout'>)</span> <span class='keyword'>of</span>
<a name="line-113"></a> <span class='conid'>Right</span> <span class='varid'>res</span> <span class='keyglyph'>-></span> <span class='varid'>res</span>
<a name="line-114"></a> <span class='conid'>Left</span> <span class='keyword'>_</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='num'>999</span><span class='layout'>,</span> <span class='varid'>xattr</span> <span class='varid'>transferMessage</span> <span class='str'>"illegal HTTP response"</span><span class='layout'>,</span> <span class='varid'>inp</span><span class='layout'>)</span>
<a name="line-115"></a>
<a name="line-116"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-117"></a><span class='comment'>--</span>
<a name="line-118"></a><span class='comment'>-- parsers for HTTP response</span>
<a name="line-119"></a>
<a name="line-120"></a><a name="parseHttpResponse"></a><span class='definition'>parseHttpResponse</span> <span class='keyglyph'>::</span> <span class='conid'>Parser</span> <span class='layout'>(</span><span class='conid'>Int</span><span class='layout'>,</span> <span class='conid'>XmlTrees</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span>
<a name="line-121"></a><span class='definition'>parseHttpResponse</span>
<a name="line-122"></a> <span class='keyglyph'>=</span> <span class='keyword'>do</span>
<a name="line-123"></a> <span class='varid'>allResponses</span> <span class='keyglyph'><-</span> <span class='varid'>many1</span>
<a name="line-124"></a> <span class='layout'>(</span> <span class='keyword'>do</span>
<a name="line-125"></a> <span class='layout'>(</span><span class='varid'>rc</span><span class='layout'>,</span> <span class='varid'>rh</span><span class='layout'>)</span> <span class='keyglyph'><-</span> <span class='varid'>parseResp</span>
<a name="line-126"></a> <span class='varid'>rhs</span> <span class='keyglyph'><-</span> <span class='varid'>parseHeaders</span>
<a name="line-127"></a> <span class='varid'>return</span> <span class='layout'>(</span><span class='varid'>rc</span><span class='layout'>,</span> <span class='varid'>rh</span><span class='layout'>,</span> <span class='varid'>rhs</span><span class='layout'>)</span>
<a name="line-128"></a> <span class='layout'>)</span>
<a name="line-129"></a> <span class='keyword'>let</span> <span class='layout'>(</span><span class='varid'>rc</span><span class='layout'>,</span> <span class='varid'>rh</span><span class='layout'>,</span> <span class='varid'>rhs</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>last</span> <span class='varid'>allResponses</span>
<a name="line-130"></a> <span class='varid'>content</span> <span class='keyglyph'><-</span> <span class='varid'>getInput</span>
<a name="line-131"></a> <span class='varid'>return</span> <span class='layout'>(</span><span class='varid'>rc</span><span class='layout'>,</span> <span class='varid'>rh</span> <span class='varop'>++</span> <span class='varid'>rhs</span><span class='layout'>,</span> <span class='varid'>content</span><span class='layout'>)</span>
<a name="line-132"></a> <span class='keyword'>where</span>
<a name="line-133"></a>
<a name="line-134"></a> <span class='varid'>crlf</span> <span class='keyglyph'>::</span> <span class='conid'>Parser</span> <span class='conid'>()</span>
<a name="line-135"></a> <span class='varid'>crlf</span>
<a name="line-136"></a> <span class='keyglyph'>=</span> <span class='keyword'>do</span>
<a name="line-137"></a> <span class='layout'>(</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>ParserCombinators</span><span class='varop'>.</span><span class='conid'>Parsec</span><span class='varop'>.</span><span class='varid'>try</span> <span class='layout'>(</span><span class='varid'>string</span> <span class='str'>"\r\n"</span><span class='layout'>)</span> <span class='varop'><|></span> <span class='varid'>string</span> <span class='str'>"\n"</span> <span class='layout'>)</span>
<a name="line-138"></a> <span class='varid'>return</span> <span class='conid'>()</span>
<a name="line-139"></a>
<a name="line-140"></a> <span class='varid'>parseResp</span> <span class='keyglyph'>::</span> <span class='conid'>Parser</span> <span class='layout'>(</span><span class='conid'>Int</span><span class='layout'>,</span> <span class='conid'>XmlTrees</span><span class='layout'>)</span>
<a name="line-141"></a> <span class='varid'>parseResp</span>
<a name="line-142"></a> <span class='keyglyph'>=</span> <span class='keyword'>do</span>
<a name="line-143"></a> <span class='varid'>vers</span> <span class='keyglyph'><-</span> <span class='layout'>(</span> <span class='keyword'>do</span>
<a name="line-144"></a> <span class='varid'>http</span> <span class='keyglyph'><-</span> <span class='varid'>string</span> <span class='str'>"HTTP/"</span>
<a name="line-145"></a> <span class='varid'>mav</span> <span class='keyglyph'><-</span> <span class='varid'>many1</span> <span class='varid'>digit</span>
<a name="line-146"></a> <span class='varid'>char</span> <span class='chr'>'.'</span>
<a name="line-147"></a> <span class='varid'>miv</span> <span class='keyglyph'><-</span> <span class='varid'>many1</span> <span class='varid'>digit</span>
<a name="line-148"></a> <span class='varid'>return</span> <span class='layout'>(</span><span class='varid'>http</span> <span class='varop'>++</span> <span class='varid'>mav</span> <span class='varop'>++</span> <span class='str'>"."</span> <span class='varop'>++</span> <span class='varid'>miv</span><span class='layout'>)</span>
<a name="line-149"></a> <span class='layout'>)</span>
<a name="line-150"></a> <span class='varid'>spaces</span>
<a name="line-151"></a> <span class='varid'>ds</span> <span class='keyglyph'><-</span> <span class='varid'>many1</span> <span class='varid'>digit</span>
<a name="line-152"></a> <span class='varid'>spaces</span>
<a name="line-153"></a> <span class='varid'>reason</span> <span class='keyglyph'><-</span> <span class='varid'>manyTill</span> <span class='varid'>anyChar</span> <span class='varid'>crlf</span>
<a name="line-154"></a> <span class='varid'>return</span> <span class='layout'>(</span> <span class='varid'>read</span> <span class='varid'>ds</span><span class='layout'>,</span>
<a name="line-155"></a> <span class='varid'>xattr</span> <span class='varid'>transferMessage</span> <span class='varid'>reason</span> <span class='varop'>++</span> <span class='varid'>xattr</span> <span class='varid'>transferVersion</span> <span class='varid'>vers</span>
<a name="line-156"></a> <span class='layout'>)</span>
<a name="line-157"></a>
<a name="line-158"></a> <span class='varid'>parseHeaders</span> <span class='keyglyph'>::</span> <span class='conid'>Parser</span> <span class='conid'>XmlTrees</span>
<a name="line-159"></a> <span class='varid'>parseHeaders</span>
<a name="line-160"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='keyword'>do</span>
<a name="line-161"></a> <span class='varid'>crlf</span>
<a name="line-162"></a> <span class='varid'>return</span> <span class='conid'>[]</span>
<a name="line-163"></a> <span class='layout'>)</span>
<a name="line-164"></a> <span class='varop'><|></span>
<a name="line-165"></a> <span class='layout'>(</span> <span class='keyword'>do</span>
<a name="line-166"></a> <span class='varid'>header1</span> <span class='keyglyph'><-</span> <span class='varid'>parse1Header</span>
<a name="line-167"></a> <span class='varid'>rest</span> <span class='keyglyph'><-</span> <span class='varid'>parseHeaders</span>
<a name="line-168"></a> <span class='varid'>return</span> <span class='varop'>$</span> <span class='varid'>header1</span> <span class='varop'>++</span> <span class='varid'>rest</span>
<a name="line-169"></a> <span class='layout'>)</span>
<a name="line-170"></a> <span class='varop'><|></span>
<a name="line-171"></a> <span class='layout'>(</span> <span class='keyword'>do</span>
<a name="line-172"></a> <span class='varid'>return</span> <span class='varop'>$</span> <span class='varid'>xattr</span> <span class='layout'>(</span><span class='varid'>httpPrefix</span> <span class='varop'>++</span> <span class='str'>"IllegalHeaders"</span><span class='layout'>)</span> <span class='str'>""</span>
<a name="line-173"></a> <span class='layout'>)</span>
<a name="line-174"></a>
<a name="line-175"></a> <span class='varid'>parse1Header</span> <span class='keyglyph'>::</span> <span class='conid'>Parser</span> <span class='conid'>XmlTrees</span>
<a name="line-176"></a> <span class='varid'>parse1Header</span>
<a name="line-177"></a> <span class='keyglyph'>=</span> <span class='keyword'>do</span>
<a name="line-178"></a> <span class='varid'>header</span> <span class='keyglyph'><-</span> <span class='varid'>manyTill</span> <span class='varid'>anyChar</span> <span class='layout'>(</span><span class='varid'>char</span> <span class='chr'>':'</span><span class='layout'>)</span>
<a name="line-179"></a> <span class='varid'>spaces</span>
<a name="line-180"></a> <span class='varid'>value</span> <span class='keyglyph'><-</span> <span class='varid'>manyTill</span> <span class='varid'>anyChar</span> <span class='varid'>crlf</span>
<a name="line-181"></a> <span class='keyword'>let</span> <span class='varid'>ct</span> <span class='keyglyph'>=</span> <span class='varid'>parseCT</span> <span class='varid'>header</span> <span class='varid'>value</span>
<a name="line-182"></a> <span class='varid'>return</span> <span class='varop'>$</span> <span class='varid'>ct</span> <span class='varop'>++</span> <span class='varid'>xattr</span> <span class='layout'>(</span><span class='varid'>httpPrefix</span> <span class='varop'>++</span> <span class='varid'>header</span><span class='layout'>)</span> <span class='varid'>value</span>
<a name="line-183"></a> <span class='keyword'>where</span>
<a name="line-184"></a> <span class='varid'>parseCT</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTrees</span>
<a name="line-185"></a> <span class='varid'>parseCT</span> <span class='varid'>h</span> <span class='varid'>v</span>
<a name="line-186"></a> <span class='keyglyph'>|</span> <span class='varid'>map</span> <span class='varid'>toLower</span> <span class='varid'>h</span> <span class='varop'>==</span> <span class='str'>"content-type"</span>
<a name="line-187"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span> <span class='keyword'>case</span> <span class='layout'>(</span><span class='varid'>parse</span> <span class='varid'>parseContentType</span> <span class='varid'>h</span> <span class='varid'>v</span><span class='layout'>)</span> <span class='keyword'>of</span>
<a name="line-188"></a> <span class='conid'>Right</span> <span class='varid'>res</span> <span class='keyglyph'>-></span> <span class='varid'>concatMap</span> <span class='layout'>(</span><span class='varid'>uncurry</span> <span class='varid'>xattr</span><span class='layout'>)</span> <span class='varid'>res</span>
<a name="line-189"></a> <span class='conid'>Left</span> <span class='keyword'>_</span> <span class='keyglyph'>-></span> <span class='conid'>[]</span>
<a name="line-190"></a> <span class='layout'>)</span>
<a name="line-191"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-192"></a> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-193"></a>
<a name="line-194"></a><span class='comment'>-- ------------------------------------------------------------</span>
</pre></body>
</html>