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<title>src/URL/Curl.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, ForeignFunctionInterface #-}</span>
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<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>URL</span><span class='hs-varop'>.</span><span class='hs-conid'>Curl</span> <span class='hs-keyword'>where</span>
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<a name="line-5"></a><span class='hs-cpp'>#ifdef HAVE_CURL</span>
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<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-conid'>Extensible</span> <span class='hs-layout'>(</span> <span class='hs-varid'>bracket</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'>Monad</span> <span class='hs-layout'>(</span> <span class='hs-varid'>when</span> <span class='hs-layout'>)</span>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span> <span class='hs-conid'>CLong</span><span class='hs-layout'>,</span> <span class='hs-conid'>CInt</span> <span class='hs-layout'>)</span>
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<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Progress</span> <span class='hs-layout'>(</span> <span class='hs-varid'>debugMessage</span> <span class='hs-layout'>)</span>
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<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>URL</span><span class='hs-varop'>.</span><span class='hs-conid'>Request</span>
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<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>String</span> <span class='hs-layout'>(</span> <span class='hs-varid'>withCString</span><span class='hs-layout'>,</span> <span class='hs-varid'>peekCString</span><span class='hs-layout'>,</span> <span class='hs-conid'>CString</span> <span class='hs-layout'>)</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Marshal</span><span class='hs-varop'>.</span><span class='hs-conid'>Alloc</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span>
<a name="line-19"></a>
<a name="line-20"></a><a name="setDebugHTTP"></a><span class='hs-definition'>setDebugHTTP</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-21"></a><span class='hs-definition'>setDebugHTTP</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>curl_enable_debug</span>
<a name="line-22"></a>
<a name="line-23"></a><a name="requestUrl"></a><span class='hs-definition'>requestUrl</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Cachable</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-24"></a><span class='hs-definition'>requestUrl</span> <span class='hs-varid'>u</span> <span class='hs-varid'>f</span> <span class='hs-varid'>cache</span> <span class='hs-keyglyph'>=</span>
<a name="line-25"></a> <span class='hs-varid'>withCString</span> <span class='hs-varid'>u</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ustr</span> <span class='hs-keyglyph'>-></span>
<a name="line-26"></a> <span class='hs-varid'>withCString</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>fstr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-27"></a> <span class='hs-varid'>err</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>curl_request_url</span> <span class='hs-varid'>ustr</span> <span class='hs-varid'>fstr</span> <span class='hs-layout'>(</span><span class='hs-varid'>cachableToInt</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>peekCString</span>
<a name="line-28"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>err</span>
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<a name="line-30"></a><a name="waitNextUrl"></a><span class='hs-definition'>waitNextUrl</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>ConnectionError</span><span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-definition'>waitNextUrl</span> <span class='hs-keyglyph'>=</span>
<a name="line-32"></a> <span class='hs-varid'>bracket</span> <span class='hs-varid'>malloc</span> <span class='hs-varid'>free</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>errorPointer</span> <span class='hs-keyglyph'>-></span>
<a name="line-33"></a> <span class='hs-varid'>bracket</span> <span class='hs-varid'>malloc</span> <span class='hs-varid'>free</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>httpErrorPointer</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-34"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>curl_wait_next_url</span> <span class='hs-varid'>errorPointer</span> <span class='hs-varid'>httpErrorPointer</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>peekCString</span>
<a name="line-35"></a> <span class='hs-varid'>ce</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>do</span>
<a name="line-36"></a> <span class='hs-varid'>errorNum</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>errorPointer</span>
<a name="line-37"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>null</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-38"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span>
<a name="line-39"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>errorNum</span> <span class='hs-keyword'>of</span>
<a name="line-40"></a> <span class='hs-num'>6</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-conid'>CouldNotResolveHost</span>
<a name="line-41"></a> <span class='hs-num'>7</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-conid'>CouldNotConnectToServer</span>
<a name="line-42"></a> <span class='hs-num'>28</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-conid'>OperationTimeout</span>
<a name="line-43"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-44"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-45"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>errorNum</span> <span class='hs-varop'>==</span> <span class='hs-num'>90</span> <span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>debugMessage</span> <span class='hs-str'>"The environment variable DARCS_CONNECTION_TIMEOUT is not a number"</span>
<a name="line-46"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-47"></a> <span class='hs-varid'>u</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>curl_last_url</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>peekCString</span>
<a name="line-48"></a> <span class='hs-varid'>httpErrorCode</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>httpErrorPointer</span>
<a name="line-49"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>detailedErrorMessage</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>httpErrorCode</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span>
<a name="line-50"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>e</span> <span class='hs-varop'>++</span> <span class='hs-str'>" "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>httpErrorCode</span>
<a name="line-51"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>e</span>
<a name="line-52"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>detailedErrorMessage</span><span class='hs-layout'>,</span> <span class='hs-varid'>ce</span><span class='hs-layout'>)</span>
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<a name="line-54"></a><a name="pipeliningEnabled"></a><span class='hs-definition'>pipeliningEnabled</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-55"></a><span class='hs-definition'>pipeliningEnabled</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-56"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>curl_pipelining_enabled</span>
<a name="line-57"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>r</span> <span class='hs-varop'>/=</span> <span class='hs-num'>0</span>
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<a name="line-59"></a><a name="cachableToInt"></a><span class='hs-definition'>cachableToInt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cachable</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span>
<a name="line-60"></a><span class='hs-definition'>cachableToInt</span> <span class='hs-conid'>Cachable</span> <span class='hs-keyglyph'>=</span> <span class='hs-comment'>-</span><span class='hs-num'>1</span>
<a name="line-61"></a><span class='hs-definition'>cachableToInt</span> <span class='hs-conid'>Uncachable</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-62"></a><span class='hs-definition'>cachableToInt</span> <span class='hs-layout'>(</span><span class='hs-conid'>MaxAge</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span>
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<a name="line-64"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"hscurl.h curl_request_url"</span>
<a name="line-65"></a> <span class='hs-varid'>curl_request_url</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CString</span>
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<a name="line-67"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"hscurl.h curl_wait_next_url"</span>
<a name="line-68"></a> <span class='hs-varid'>curl_wait_next_url</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CLong</span><span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CString</span>
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<a name="line-70"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"hscurl.h curl_last_url"</span>
<a name="line-71"></a> <span class='hs-varid'>curl_last_url</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CString</span>
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<a name="line-73"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"hscurl.h curl_enable_debug"</span>
<a name="line-74"></a> <span class='hs-varid'>curl_enable_debug</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
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<a name="line-76"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"hscurl.h curl_pipelining_enabled"</span>
<a name="line-77"></a> <span class='hs-varid'>curl_pipelining_enabled</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-78"></a>
<a name="line-79"></a><span class='hs-cpp'>#endif</span>
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