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<span style="color: #000080;font-style:italic;">--
-- demo\rosetta\rosettacode_cache.e
-- ================================
--
-- Common routines for handling rc_cache etc.
--</span>
<span style="color: #008080;">without</span> <span style="color: #008080;">js</span> <span style="color: #000080;font-style:italic;">-- (libcurl, file i/o, peek, progress..)</span>
<span style="color: #008080;">include</span> <span style="color: #000000;">builtins</span><span style="color: #0000FF;">\</span><span style="color: #004080;">timedate</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">day</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">timedelta</span><span style="color: #0000FF;">(</span><span style="color: #000000;">days</span><span style="color: #0000FF;">:=</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">refresh_cache</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">21</span><span style="color: #0000FF;">*</span><span style="color: #000000;">day</span> <span style="color: #000080;font-style:italic;">-- 0 for always [NB refresh_cache += timedelta(days:=1) below]</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">days</span><span style="color: #0000FF;">(</span><span style="color: #004080;">atom</span> <span style="color: #000000;">delta</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">d</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">ceil</span><span style="color: #0000FF;">(</span><span style="color: #000000;">delta</span><span style="color: #0000FF;">/</span><span style="color: #000000;">day</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%d day%s"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">d</span><span style="color: #0000FF;">,</span><span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">d</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span><span style="color: #0000FF;">?</span><span style="color: #008000;">""</span><span style="color: #0000FF;">:</span><span style="color: #008000;">"s"</span><span style="color: #0000FF;">)})</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">constant</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">hex</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ascii</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">columnize</span><span style="color: #0000FF;">({{</span><span style="color: #008000;">"%22"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`"`</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%27"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"'"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%2A"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"*"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%2B"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"+"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%3A"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">":"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%5E"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`^`</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%E2%80%93"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"-"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%E2%80%99"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"'"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%C3%A8"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"e"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%C3%A9"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"e"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%C3%B6"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"o"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"%C5%91"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"o"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"&quot;"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`"`</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"&#039;"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"'"</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"_"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" "</span><span style="color: #0000FF;">}})</span>
<span style="color: #008080;">global</span> <span style="color: #008080;">function</span> <span style="color: #000000;">html_clean</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #7060A8;">substitute_all</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">hex</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ascii</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">include</span> <span style="color: #000000;">builtins</span><span style="color: #0000FF;">\</span><span style="color: #000000;">libcurl</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">curl</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">pErrorBuffer</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">write_callback</span><span style="color: #0000FF;">(</span><span style="color: #004080;">atom</span> <span style="color: #000000;">pData</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">size</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">nmemb</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">fn</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">bytes_written</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">size</span> <span style="color: #0000FF;">*</span> <span style="color: #000000;">nmemb</span>
<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">fn</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">peek</span><span style="color: #0000FF;">({</span><span style="color: #000000;">pData</span><span style="color: #0000FF;">,</span><span style="color: #000000;">bytes_written</span><span style="color: #0000FF;">}))</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">bytes_written</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">write_cb</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">call_back</span><span style="color: #0000FF;">({</span><span style="color: #008000;">'+'</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">write_callback</span><span style="color: #0000FF;">})</span>
<span style="color: #008080;">global</span> <span style="color: #004080;">string</span> <span style="color: #000000;">wastitle</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">""</span> <span style="color: #000080;font-style:italic;">-- don't clobber "NEED EDITING"/Downloading messages</span>
<span style="color: #008080;">global</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">show_title</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">progress</span>
<span style="color: #008080;">global</span> <span style="color: #008080;">function</span> <span style="color: #000000;">open_download</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">filename</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">url</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">text</span>
<span style="color: #004080;">bool</span> <span style="color: #000000;">refetch</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">false</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">why</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"not found"</span>
<span style="color: #000000;">filename</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">join_path</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"rc_cache"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">})</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">file_exists</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
<span style="color: #000080;font-style:italic;">-- use existing file if &lt;= refresh_cache days old</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">last_mod</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">get_file_date</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">delta</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">timedate_diff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">last_mod</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">date</span><span style="color: #0000FF;">())</span>
<span style="color: #000000;">refetch</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">true</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">delta</span><span style="color: #0000FF;">></span><span style="color: #000000;">refresh_cache</span>
<span style="color: #008080;">and</span> <span style="color: #008080;">not</span> <span style="color: #7060A8;">match</span><span style="color: #0000FF;">(</span><span style="color: #008000;">".hist"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">why</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">days</span><span style="color: #0000FF;">(</span><span style="color: #000000;">delta</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">&</span> <span style="color: #008000;">" &gt; "</span> <span style="color: #0000FF;">&</span> <span style="color: #000000;">days</span><span style="color: #0000FF;">(</span><span style="color: #000000;">refresh_cache</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">elsif</span> <span style="color: #7060A8;">get_file_size</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">why</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"filesize of 0"</span>
<span style="color: #008080;">else</span>
<span style="color: #000000;">text</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">trim</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">get_text</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">))</span>
<span style="color: #008080;">if</span> <span style="color: #008080;">not</span> <span style="color: #004080;">sequence</span><span style="color: #0000FF;">(</span><span style="color: #000000;">text</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">why</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"no text"</span>
<span style="color: #008080;">elsif</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">text</span><span style="color: #0000FF;">)<</span><span style="color: #000000;">10</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">why</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"&lt;10 bytes"</span>
<span style="color: #008080;">else</span>
<span style="color: #000000;">refetch</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">false</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">else</span>
<span style="color: #000000;">refetch</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">true</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">directory</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">get_file_path</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">get_file_type</span><span style="color: #0000FF;">(</span><span style="color: #000000;">directory</span><span style="color: #0000FF;">)!=</span><span style="color: #004600;">FILETYPE_DIRECTORY</span> <span style="color: #008080;">then</span>
<span style="color: #008080;">if</span> <span style="color: #008080;">not</span> <span style="color: #000000;">create_directory</span><span style="color: #0000FF;">(</span><span style="color: #000000;">directory</span><span style="color: #0000FF;">,</span><span style="color: #000000;">make_parent</span><span style="color: #0000FF;">:=</span><span style="color: #004600;">true</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">crash</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"cannot create %s directory"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">directory</span><span style="color: #0000FF;">})</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">refetch</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">wastitle</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"x"</span> <span style="color: #000080;font-style:italic;">-- don't clobber</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">nofn</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">?</span><span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"(%d/%d, %.1f%%) "</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">i</span><span style="color: #0000FF;">,</span><span style="color: #000000;">n</span><span style="color: #0000FF;">,</span><span style="color: #000000;">i</span><span style="color: #0000FF;">/</span><span style="color: #000000;">n</span><span style="color: #0000FF;">*</span><span style="color: #000000;">100</span><span style="color: #0000FF;">}):</span><span style="color: #008000;">""</span><span style="color: #0000FF;">),</span>
<span style="color: #000000;">title</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Downloading %s%s (%s)..."</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">nofn</span><span style="color: #0000FF;">,</span><span style="color: #000000;">html_clean</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">),</span><span style="color: #000000;">why</span><span style="color: #0000FF;">})</span>
<span style="color: #000000;">show_title</span><span style="color: #0000FF;">(</span><span style="color: #000000;">title</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">curl</span><span style="color: #0000FF;">=</span><span style="color: #004600;">NULL</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">curl_global_init</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">curl</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">curl_easy_init</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">pErrorBuffer</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">allocate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">CURL_ERROR_SIZE</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">curl_easy_setopt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">curl</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">CURLOPT_ERRORBUFFER</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">pErrorBuffer</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">curl_easy_setopt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">curl</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">CURLOPT_WRITEFUNCTION</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">write_cb</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">url</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">substitute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">url</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%3A"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">":"</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">url</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">substitute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">url</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%2A"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"*"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">curl_easy_setopt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">curl</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">CURLOPT_URL</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">url</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">fn</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">open</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"wb"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">assert</span><span style="color: #0000FF;">(</span><span style="color: #000000;">fn</span><span style="color: #0000FF;">!=-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"cannot open "</span><span style="color: #0000FF;">&</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">curl_easy_setopt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">curl</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">CURLOPT_WRITEDATA</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">fn</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">while</span> <span style="color: #004600;">true</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">CURLcode</span> <span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">curl_easy_perform</span><span style="color: #0000FF;">(</span><span style="color: #000000;">curl</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">res</span><span style="color: #0000FF;">=</span><span style="color: #004600;">CURLE_OK</span> <span style="color: #008080;">then</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">error</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%d"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">res</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">res</span><span style="color: #0000FF;">=</span><span style="color: #000000;">CURLE_COULDNT_RESOLVE_HOST</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">error</span> <span style="color: #0000FF;">&=</span> <span style="color: #008000;">" [CURLE_COULDNT_RESOLVE_HOST]"</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #7060A8;">progress</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Error %s downloading file, retry?(Y/N):"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">error</span><span style="color: #0000FF;">})</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">lower</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">wait_key</span><span style="color: #0000FF;">())!=</span><span style="color: #008000;">'y'</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">abort</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Y\n"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #7060A8;">close</span><span style="color: #0000FF;">(</span><span style="color: #000000;">fn</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">refresh_cache</span> <span style="color: #0000FF;">+=</span> <span style="color: #7060A8;">timedelta</span><span style="color: #0000FF;">(</span><span style="color: #000000;">days</span><span style="color: #0000FF;">:=</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- did I mention it is slow?</span>
<span style="color: #000000;">text</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">get_text</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">text</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">global</span> <span style="color: #008080;">function</span> <span style="color: #000000;">open_category</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">filename</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">open_download</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">&</span><span style="color: #008000;">".htm"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"http://rosettacode.org/wiki/Category:"</span><span style="color: #0000FF;">&</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">,</span><span style="color: #000000;">i</span><span style="color: #0000FF;">,</span><span style="color: #000000;">n</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">global</span> <span style="color: #008080;">function</span> <span style="color: #000000;">dewiki</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">sequence</span> <span style="color: #000000;">exclude</span><span style="color: #0000FF;">={})</span>
<span style="color: #000080;font-style:italic;">-- extract tasks from eg `&lt;li&gt;&lt;a href="/wiki/100_doors"`</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">tasks</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">start</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">finish</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">match</span><span style="color: #0000FF;">(</span><span style="color: #008000;">`&lt;div class="printfooter"&gt;`</span><span style="color: #0000FF;">,</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">..</span><span style="color: #000000;">finish</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">while</span> <span style="color: #004600;">true</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">start</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">match</span><span style="color: #0000FF;">(</span><span style="color: #008000;">`&lt;li&gt;&lt;a href="/wiki/`</span><span style="color: #0000FF;">,</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">start</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">start</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">start</span> <span style="color: #0000FF;">+=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #008000;">`&lt;li&gt;&lt;a href="/wiki/`</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">finish</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #008000;">'"'</span><span style="color: #0000FF;">,</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">start</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">task</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">start</span><span style="color: #0000FF;">..</span><span style="color: #000000;">finish</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
<span style="color: #000000;">task</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">substitute_all</span><span style="color: #0000FF;">(</span><span style="color: #000000;">task</span><span style="color: #0000FF;">,{</span><span style="color: #008000;">"*"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">":"</span><span style="color: #0000FF;">},{</span><span style="color: #008000;">"%2A"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%3A"</span><span style="color: #0000FF;">})</span>
<span style="color: #000000;">tasks</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tasks</span><span style="color: #0000FF;">,</span><span style="color: #000000;">task</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">start</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">finish</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">tasks</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">global</span> <span style="color: #008080;">procedure</span> <span style="color: #000000;">curl_cleanup</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">curl</span><span style="color: #0000FF;">!=</span><span style="color: #004600;">NULL</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">curl_easy_cleanup</span><span style="color: #0000FF;">(</span><span style="color: #000000;">curl</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">free</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pErrorBuffer</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">curl</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">NULL</span>
<span style="color: #000000;">pErrorBuffer</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">NULL</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
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