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<title>src/URL/HTTP.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-2"></a>
<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'>HTTP</span><span class='hs-layout'>(</span> <span class='hs-varid'>fetchUrl</span><span class='hs-layout'>,</span> <span class='hs-varid'>postUrl</span><span class='hs-layout'>,</span> <span class='hs-varid'>requestUrl</span><span class='hs-layout'>,</span> <span class='hs-varid'>waitNextUrl</span> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-4"></a>
<a name="line-5"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Global</span> <span class='hs-layout'>(</span> <span class='hs-varid'>debugFail</span> <span class='hs-layout'>)</span>
<a name="line-6"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Version</span> <span class='hs-layout'>(</span> <span class='hs-varid'>version</span> <span class='hs-layout'>)</span>
<a name="line-7"></a>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>URL</span><span class='hs-varop'>.</span><span class='hs-conid'>Request</span> <span class='hs-layout'>(</span> <span class='hs-conid'>ConnectionError</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-9"></a>
<a name="line-10"></a><span class='hs-cpp'>#ifdef HAVE_HTTP</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span> <span class='hs-varid'>newIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>readIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>writeIORef</span><span class='hs-layout'>,</span> <span class='hs-conid'>IORef</span> <span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>HTTP</span>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Browser</span> <span class='hs-layout'>(</span> <span class='hs-varid'>browse</span><span class='hs-layout'>,</span> <span class='hs-varid'>request</span><span class='hs-layout'>,</span> <span class='hs-varid'>setCheckForProxy</span><span class='hs-layout'>,</span> <span class='hs-varid'>setErrHandler</span><span class='hs-layout'>,</span> <span class='hs-varid'>setOutHandler</span> <span class='hs-layout'>)</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>URI</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span> <span class='hs-layout'>(</span> <span class='hs-varid'>ioeGetErrorString</span> <span class='hs-layout'>)</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span> <span class='hs-layout'>(</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-layout'>)</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Global</span> <span class='hs-layout'>(</span> <span class='hs-varid'>debugMessage</span> <span class='hs-layout'>)</span>
<a name="line-18"></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'>B</span>
<a name="line-19"></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'>BC</span>
<a name="line-20"></a><span class='hs-cpp'>#endif</span>
<a name="line-21"></a>
<a name="line-22"></a><a name="fetchUrl"></a><span class='hs-definition'>fetchUrl</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-23"></a><a name="postUrl"></a><span class='hs-definition'>postUrl</span>
<a name="line-24"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ url</span>
<a name="line-25"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ body</span>
<a name="line-26"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ mime type</span>
<a name="line-27"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <span class='hs-comment'>-- ^ result</span>
<a name="line-28"></a>
<a name="line-29"></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-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<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>
<a name="line-32"></a><span class='hs-cpp'>#ifdef HAVE_HTTP</span>
<a name="line-33"></a>
<a name="line-34"></a><a name="headers"></a><span class='hs-definition'>headers</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Header</span><span class='hs-keyglyph'>]</span>
<a name="line-35"></a><span class='hs-definition'>headers</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Header</span> <span class='hs-conid'>HdrUserAgent</span> <span class='hs-varop'>$</span> <span class='hs-str'>"darcs-HTTP/"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>version</span><span class='hs-keyglyph'>]</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='hs-definition'>fetchUrl</span> <span class='hs-varid'>url</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>parseURI</span> <span class='hs-varid'>url</span> <span class='hs-keyword'>of</span>
<a name="line-38"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Invalid URI: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>url</span>
<a name="line-39"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>uri</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>debugMessage</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Fetching over HTTP: "</span><span class='hs-varop'>++</span><span class='hs-varid'>url</span>
<a name="line-40"></a> <span class='hs-varid'>resp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>catch</span> <span class='hs-layout'>(</span><span class='hs-varid'>browse</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-41"></a> <span class='hs-varid'>setCheckForProxy</span> <span class='hs-conid'>True</span>
<a name="line-42"></a> <span class='hs-varid'>setOutHandler</span> <span class='hs-varid'>debugMessage</span>
<a name="line-43"></a> <span class='hs-varid'>setErrHandler</span> <span class='hs-varid'>debugMessage</span>
<a name="line-44"></a> <span class='hs-varid'>request</span> <span class='hs-conid'>Request</span> <span class='hs-layout'>{</span> <span class='hs-varid'>rqURI</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>uri</span><span class='hs-layout'>,</span>
<a name="line-45"></a> <span class='hs-varid'>rqMethod</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>GET</span><span class='hs-layout'>,</span>
<a name="line-46"></a> <span class='hs-varid'>rqHeaders</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>headers</span><span class='hs-layout'>,</span>
<a name="line-47"></a> <span class='hs-varid'>rqBody</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-48"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>debugFail</span> <span class='hs-varop'>$</span> <span class='hs-varid'>show</span> <span class='hs-varid'>err</span><span class='hs-layout'>)</span>
<a name="line-49"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>resp</span> <span class='hs-keyword'>of</span>
<a name="line-50"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>res</span><span class='hs-keyglyph'>@</span><span class='hs-conid'>Response</span> <span class='hs-layout'>{</span> <span class='hs-varid'>rspCode</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-num'>2</span><span class='hs-layout'>,</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>rspBody</span> <span class='hs-varid'>res</span><span class='hs-layout'>)</span>
<a name="line-51"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-conid'>Response</span> <span class='hs-layout'>{</span> <span class='hs-varid'>rspCode</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-52"></a> <span class='hs-varid'>debugFail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"HTTP "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>y</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>z</span> <span class='hs-varop'>++</span> <span class='hs-str'>" error getting "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>uri</span>
<a name="line-53"></a>
<a name="line-54"></a><span class='hs-definition'>postUrl</span> <span class='hs-varid'>url</span> <span class='hs-varid'>body</span> <span class='hs-varid'>mime</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>parseURI</span> <span class='hs-varid'>url</span> <span class='hs-keyword'>of</span>
<a name="line-55"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Invalid URI: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>url</span>
<a name="line-56"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>uri</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>debugMessage</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Posting to HTTP: "</span><span class='hs-varop'>++</span><span class='hs-varid'>url</span>
<a name="line-57"></a> <span class='hs-varid'>resp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>catch</span> <span class='hs-layout'>(</span><span class='hs-varid'>browse</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-58"></a> <span class='hs-varid'>setCheckForProxy</span> <span class='hs-conid'>True</span>
<a name="line-59"></a> <span class='hs-varid'>setOutHandler</span> <span class='hs-varid'>debugMessage</span>
<a name="line-60"></a> <span class='hs-varid'>setErrHandler</span> <span class='hs-varid'>debugMessage</span>
<a name="line-61"></a> <span class='hs-varid'>request</span> <span class='hs-conid'>Request</span> <span class='hs-layout'>{</span> <span class='hs-varid'>rqURI</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>uri</span><span class='hs-layout'>,</span>
<a name="line-62"></a> <span class='hs-varid'>rqMethod</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>POST</span><span class='hs-layout'>,</span>
<a name="line-63"></a> <span class='hs-varid'>rqHeaders</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>headers</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Header</span> <span class='hs-conid'>HdrContentType</span> <span class='hs-varid'>mime</span><span class='hs-layout'>,</span>
<a name="line-64"></a> <span class='hs-conid'>Header</span> <span class='hs-conid'>HdrAccept</span> <span class='hs-str'>"text/plain"</span><span class='hs-layout'>,</span>
<a name="line-65"></a> <span class='hs-conid'>Header</span> <span class='hs-conid'>HdrContentLength</span>
<a name="line-66"></a> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varop'>$</span> <span class='hs-varid'>length</span> <span class='hs-varid'>body</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-67"></a> <span class='hs-varid'>rqBody</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>body</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-68"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>debugFail</span> <span class='hs-varop'>$</span> <span class='hs-varid'>show</span> <span class='hs-varid'>err</span><span class='hs-layout'>)</span>
<a name="line-69"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>resp</span> <span class='hs-keyword'>of</span>
<a name="line-70"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>res</span><span class='hs-keyglyph'>@</span><span class='hs-conid'>Response</span> <span class='hs-layout'>{</span> <span class='hs-varid'>rspCode</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-num'>2</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-71"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Success 2"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>y</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>z</span>
<a name="line-72"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-layout'>(</span><span class='hs-varid'>rspBody</span> <span class='hs-varid'>res</span><span class='hs-layout'>)</span>
<a name="line-73"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-74"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>res</span><span class='hs-keyglyph'>@</span><span class='hs-conid'>Response</span> <span class='hs-layout'>{</span> <span class='hs-varid'>rspCode</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-75"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rspBody</span> <span class='hs-varid'>res</span>
<a name="line-76"></a> <span class='hs-varid'>debugFail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"HTTP "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>y</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>z</span> <span class='hs-varop'>++</span> <span class='hs-str'>" error posting to "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>uri</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="requestedUrl"></a><span class='hs-definition'>requestedUrl</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>FilePath</span><span class='hs-layout'>)</span>
<a name="line-79"></a><span class='hs-definition'>requestedUrl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-80"></a>
<a name="line-81"></a><span class='hs-definition'>requestUrl</span> <span class='hs-varid'>u</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-82"></a> <span class='hs-layout'>(</span><span class='hs-varid'>u'</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'>readIORef</span> <span class='hs-varid'>requestedUrl</span>
<a name="line-83"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>u'</span>
<a name="line-84"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>requestedUrl</span> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span>
<a name="line-85"></a> <span class='hs-varid'>return</span> <span class='hs-str'>""</span>
<a name="line-86"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-str'>"URL already requested"</span>
<a name="line-87"></a>
<a name="line-88"></a><span class='hs-definition'>waitNextUrl</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-89"></a> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>requestedUrl</span>
<a name="line-90"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>u</span>
<a name="line-91"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span> <span class='hs-str'>"No URL requested"</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-92"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>requestedUrl</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-93"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-varid'>fetchUrl</span> <span class='hs-varid'>u</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>writeFile</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-varop'>`catch`</span> <span class='hs-varid'>h</span>
<a name="line-94"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ce</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-95"></a> <span class='hs-str'>"timeout"</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-conid'>OperationTimeout</span>
<a name="line-96"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-97"></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'>e</span><span class='hs-layout'>,</span> <span class='hs-varid'>ce</span><span class='hs-layout'>)</span>
<a name="line-98"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>ioeGetErrorString</span>
<a name="line-99"></a>
<a name="line-100"></a><span class='hs-cpp'>#else</span>
<a name="line-101"></a>
<a name="line-102"></a><span class='hs-definition'>fetchUrl</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugFail</span> <span class='hs-str'>"Network.HTTP does not exist"</span>
<a name="line-103"></a><span class='hs-definition'>postUrl</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugFail</span> <span class='hs-str'>"Cannot use http POST because darcs was not compiled with Network.HTTP."</span>
<a name="line-104"></a>
<a name="line-105"></a><span class='hs-definition'>requestUrl</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugFail</span> <span class='hs-str'>"Network.HTTP does not exist"</span>
<a name="line-106"></a><span class='hs-definition'>waitNextUrl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugFail</span> <span class='hs-str'>"Network.HTTP does not exist"</span>
<a name="line-107"></a>
<a name="line-108"></a><span class='hs-cpp'>#endif</span>
</pre></body>
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