Find URI in text: Difference between revisions

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=={{header|Phix}}==
=={{header|Phix}}==
There is a scanForUrls() routine in demo\edita\src\easynclr.e you might be interested in which manages this (without regex) but it is a (very) long time since I wrote it and it is quite strongly coupled in with syntax colouring and other editor gubbins.
The following is based on scanForUrls() in demo\edita\src\easynclr.e which is used/tested on a daily basis and may get additional bugfixes, though it is quite strongly coupled in with syntax colouring and other editor gubbins. As the output shows it does not (yet) handle dangling ")" correctly.
<!--<syntaxhighlight lang="phix">(phixonline)-->
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">schemes</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">`ftp`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`gopher`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`http`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`https`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`mailto`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`news`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`nntp`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`telnet`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`wais`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`file`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`prospero`</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`edit`</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">scan_for_urls</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">)</span>
<span style="color: #000080;font-style:italic;">-- such as http::\\wikipedia.org</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">chidx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">chidx2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">lt</span> <span style="color: #0000FF;">=</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;">ch2</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">chidx2</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">lt</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">ch2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">[</span><span style="color: #000000;">chidx2</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">ch2</span><span style="color: #0000FF;">>=</span><span style="color: #008000;">'a'</span> <span style="color: #008080;">and</span> <span style="color: #000000;">ch2</span><span style="color: #0000FF;"><=</span><span style="color: #008000;">'z'</span> <span style="color: #008080;">then</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">chidx2</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">></span><span style="color: #000000;">chidx</span> <span style="color: #008080;">or</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">[</span><span style="color: #000000;">chidx</span><span style="color: #0000FF;">]<=</span><span style="color: #008000;">' '</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">chidx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">chidx2</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">chidx2</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">lt</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">ch2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">[</span><span style="color: #000000;">chidx2</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">ch2</span><span style="color: #0000FF;"><</span><span style="color: #008000;">'a'</span> <span style="color: #008080;">or</span> <span style="color: #000000;">ch2</span><span style="color: #0000FF;">></span><span style="color: #008000;">'z'</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;">chidx2</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: #004080;">string</span> <span style="color: #000000;">oneword</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">[</span><span style="color: #000000;">chidx</span><span style="color: #0000FF;">..</span><span style="color: #000000;">chidx2</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">chidx2</span><span style="color: #0000FF;">></span><span style="color: #000000;">lt</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;">ch2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">[</span><span style="color: #000000;">chidx2</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">ch2</span><span style="color: #0000FF;">=</span><span style="color: #008000;">':'</span> <span style="color: #008080;">and</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">oneword</span><span style="color: #0000FF;">,</span><span style="color: #000000;">schemes</span><span style="color: #0000FF;">))</span>
<span style="color: #008080;">or</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">ch2</span><span style="color: #0000FF;">=</span><span style="color: #008000;">'.'</span> <span style="color: #008080;">and</span> <span style="color: #7060A8;">equal</span><span style="color: #0000FF;">(</span><span style="color: #000000;">oneword</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"www"</span><span style="color: #0000FF;">))</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">chidx2</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">chidx0</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">chidx2</span>
<span style="color: #004080;">bool</span> <span style="color: #000000;">isUrl</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">false</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">chidx2</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">lt</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">ch2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">[</span><span style="color: #000000;">chidx2</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">ch2</span><span style="color: #0000FF;">=</span><span style="color: #008000;">'\"'</span> <span style="color: #008080;">and</span> <span style="color: #000000;">chidx2</span><span style="color: #0000FF;">=</span><span style="color: #000000;">chidx0</span> <span style="color: #008080;">then</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">chidx2</span><span style="color: #0000FF;"><</span><span style="color: #000000;">lt</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">chidx2</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
<span style="color: #000000;">ch2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">text</span><span style="color: #0000FF;">[</span><span style="color: #000000;">chidx2</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">ch2</span><span style="color: #0000FF;">=</span><span style="color: #008000;">'\"'</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">chidx2</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
<span style="color: #000000;">isUrl</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">true</span>
<span style="color: #008080;">exit</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">exit</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">ch2</span><span style="color: #0000FF;">></span><span style="color: #000000;">255</span> <span style="color: #008080;">or</span> <span style="color: #000000;">ch2</span><span style="color: #0000FF;"><=</span><span style="color: #008000;">' '</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;">isUrl</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">true</span>
<span style="color: #000000;">chidx2</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;">if</span> <span style="color: #000000;">isUrl</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">res</span><span style="color: #0000FF;">,</span><span style="color: #000000;">text</span><span style="color: #0000FF;">[</span><span style="color: #000000;">chidx</span><span style="color: #0000FF;">..</span><span style="color: #000000;">chidx2</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">])</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">chidx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">chidx2</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">chidx2</span><span style="color: #0000FF;">></span><span style="color: #000000;">lt</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: #008080;">else</span>
<span style="color: #000000;">chidx2</span> <span style="color: #0000FF;">-=</span> <span style="color: #000000;">1</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: #000000;">chidx2</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;">res</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">txt</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"""
this URI contains an illegal character, parentheses and a misplaced full stop:
http://en.wikipedia.org/wiki/Erich_Kästner_(camera_designer). (which is handled by http://mediawiki.org/).
and another one just to confuse the parser: http://en.wikipedia.org/wiki/-)
")" is handled the wrong way by the mediawiki parser.
ftp://domain.name/path(balanced_brackets)/foo.html
ftp://domain.name/path(balanced_brackets)/ending.in.dot.
ftp://domain.name/path(unbalanced_brackets/ending.in.dot.
leading junk ftp://domain.name/path/embedded?punct/uation.
leading junk ftp://domain.name/dangling_close_paren)
if you have other interesting URIs for testing, please add them here:
http://www.example.org/foo.html#includes_fragment
http://www.example.org/foo.html#enthält_Unicode-Fragment
http://192.168.0.1/admin/?hackme=%%%%%%%%%true
blah (foo://domain.hld/))))
https://haxor.ur:4592/~mama/####&?foo
"""</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;">"%s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">join</span><span style="color: #0000FF;">(</span><span style="color: #000000;">scan_for_urls</span><span style="color: #0000FF;">(</span><span style="color: #000000;">txt</span><span style="color: #0000FF;">),</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">)})</span>
<!--</syntaxhighlight>-->
{{out}}
<pre>
http://en.wikipedia.org/wiki/Erich_Kästner_(camera_designer).
http://mediawiki.org/).
http://en.wikipedia.org/wiki/-)
ftp://domain.name/path(balanced_brackets)/foo.html
ftp://domain.name/path(balanced_brackets)/ending.in.dot.
ftp://domain.name/path(unbalanced_brackets/ending.in.dot.
ftp://domain.name/path/embedded?punct/uation.
ftp://domain.name/dangling_close_paren)
http://www.example.org/foo.html#includes_fragment
http://www.example.org/foo.html#enthält_Unicode-Fragment
http://192.168.0.1/admin/?hackme=%%%%%%%%%true
https://haxor.ur:4592/~mama/####&?foo
</pre>


=={{header|PHP}}==
=={{header|PHP}}==
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