hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-Parser-ProtocolHandler.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</span>
<a name="line-4"></a><span class='comment'>-- configuration file</span>
<a name="line-5"></a><span class='comment'>-- real handler is generated with cpp</span>
<a name="line-6"></a><span class='comment'>--</span>
<a name="line-7"></a><span class='comment'>-- Version : $Id: ProtocolHandler.hs,v 1.4 2006/03/03 14:20:17 hxml Exp $</span>
<a name="line-8"></a>
<a name="line-9"></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'>ProtocolHandler</span>
<a name="line-10"></a> <span class='layout'>(</span> <span class='varid'>getProtocolHandler</span>
<a name="line-11"></a> <span class='layout'>)</span>
<a name="line-12"></a>
<a name="line-13"></a><span class='keyword'>where</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='comment'>-- ------------------------------------------------------------</span>
<a name="line-18"></a><span class='comment'>--</span>
<a name="line-19"></a><span class='comment'>-- file io and network</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Maybe</span>
<a name="line-22"></a> <span class='layout'>(</span> <span class='varid'>fromMaybe</span>
<a name="line-23"></a> <span class='layout'>)</span>
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<a name="line-25"></a><span class='keyword'>import</span> <span class='conid'>Network</span><span class='varop'>.</span><span class='conid'>URI</span>
<a name="line-26"></a> <span class='layout'>(</span> <span class='conid'>URI</span>
<a name="line-27"></a> <span class='layout'>,</span> <span class='varid'>uriScheme</span>
<a name="line-28"></a> <span class='layout'>)</span>
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<a name="line-30"></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'>ProtocolHandlerFile</span>
<a name="line-31"></a> <span class='layout'>(</span> <span class='varid'>getFileContents</span>
<a name="line-32"></a> <span class='layout'>)</span>
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<a name="line-44"></a>
<a name="line-45"></a>
<a name="line-46"></a>
<a name="line-47"></a>
<a name="line-48"></a>
<a name="line-49"></a>
<a name="line-50"></a>
<a name="line-51"></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'>ProtocolHandlerHttpNativeOrCurl</span>
<a name="line-52"></a> <span class='layout'>(</span> <span class='varid'>getHttpContentsNativeOrWithCurl</span>
<a name="line-53"></a> <span class='layout'>)</span>
<a name="line-54"></a>
<a name="line-55"></a>
<a name="line-56"></a>
<a name="line-57"></a>
<a name="line-58"></a>
<a name="line-59"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-60"></a><span class='comment'>--</span>
<a name="line-61"></a>
<a name="line-62"></a><a name="getProtocolHandler"></a><span class='definition'>getProtocolHandler</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='conid'>URI</span> <span class='keyglyph'>-></span> <span class='conid'>XmlStateFilter</span> <span class='varid'>a</span><span class='layout'>)</span>
<a name="line-63"></a><span class='definition'>getProtocolHandler</span> <span class='varid'>proto</span>
<a name="line-64"></a> <span class='keyglyph'>=</span> <span class='varid'>fromMaybe</span> <span class='varid'>getUnsupported</span> <span class='varid'>handler</span>
<a name="line-65"></a> <span class='keyword'>where</span>
<a name="line-66"></a> <span class='varid'>handler</span> <span class='keyglyph'>=</span> <span class='varid'>lookup</span> <span class='varid'>proto</span> <span class='varid'>protocolHandler</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='comment'>--</span>
<a name="line-69"></a><span class='comment'>-- the fall back protocol handler</span>
<a name="line-70"></a>
<a name="line-71"></a><a name="getUnsupported"></a><span class='definition'>getUnsupported</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-72"></a><span class='definition'>getUnsupported</span> <span class='varid'>uri</span>
<a name="line-73"></a> <span class='keyglyph'>=</span> <span class='varid'>addFatal</span> <span class='layout'>(</span> <span class='str'>"unsupported protocol "</span>
<a name="line-74"></a> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>uriScheme</span> <span class='varid'>uri</span><span class='layout'>)</span>
<a name="line-75"></a> <span class='varop'>++</span> <span class='str'>" in URI: "</span>
<a name="line-76"></a> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>uri</span>
<a name="line-77"></a> <span class='layout'>)</span>
<a name="line-78"></a>
<a name="line-79"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-80"></a><span class='comment'>--</span>
<a name="line-81"></a><span class='comment'>-- the table of potocol handlers</span>
<a name="line-82"></a><span class='comment'>-- looked up in getProtocolHandler</span>
<a name="line-83"></a>
<a name="line-84"></a><a name="protocolHandler"></a><span class='definition'>protocolHandler</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>URI</span> <span class='keyglyph'>-></span> <span class='conid'>XmlStateFilter</span> <span class='varid'>a</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-85"></a><span class='definition'>protocolHandler</span>
<a name="line-86"></a> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span> <span class='layout'>(</span><span class='str'>"file"</span><span class='layout'>,</span> <span class='varid'>getFileContents</span><span class='layout'>)</span>
<a name="line-87"></a> <span class='layout'>,</span> <span class='layout'>(</span><span class='str'>"http"</span><span class='layout'>,</span>
<a name="line-88"></a>
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<a name="line-102"></a>
<a name="line-103"></a>
<a name="line-104"></a>
<a name="line-105"></a> <span class='varid'>getHttpContentsNativeOrWithCurl</span>
<a name="line-106"></a>
<a name="line-107"></a>
<a name="line-108"></a>
<a name="line-109"></a>
<a name="line-110"></a> <span class='layout'>)</span>
<a name="line-111"></a> <span class='keyglyph'>]</span>
<a name="line-112"></a>
<a name="line-113"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-114"></a>
<a name="line-115"></a>
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