URL decoding: Difference between revisions
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=={{header|Java}}==
Java offers the ''URLDecoder'' and ''URLEncoder'' classes for this specific task.
<syntaxhighlight lang="java">
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;
<syntaxhighlight lang="java">
URLDecoder.decode("http%3A%2F%2Ffoo%20bar%2F", StandardCharsets.UTF_8)
</syntaxhighlight>
Alternately, you could use a regular expression capture
<syntaxhighlight lang="java">
import java.util.regex.Matcher;
import java.util.regex.Pattern;
</syntaxhighlight>
<syntaxhighlight lang="java">
String decode(String string) {
Pattern pattern = Pattern.compile("%([A-Za-z\\d]{2})");
Matcher matcher = pattern.matcher(string);
StringBuilder decoded = new StringBuilder(string);
char character;
int start, end, offset = 0;
while (matcher.find()) {
character = (char) Integer.parseInt(matcher.group(1), 16);
/* offset the matched index since were adjusting the string */
start = matcher.start() - offset;
end = matcher.end() - offset;
decoded.replace(start, end, String.valueOf(character));
offset += 2;
}
return decoded.toString();
▲}</syntaxhighlight>
}
</syntaxhighlight>
<pre>
google.com/search?q=`Abdu'l-Bahá
</pre>
=={{header|JavaScript}}==
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=={{header|langur}}==
<syntaxhighlight lang="langur">val .
val .decode =
writeln .decode("http%3A%2F%2Ffoo%20bar%2F")
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works like ''fromPercentEncoded'' and additionally decodes '+' with a space.
Both functions return byte sequences.
To decode Unicode characters it is necessary to convert them from UTF-8 with
<syntaxhighlight lang="seed7">$ include "seed7_05.s7i";
include "encoding.s7i";
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=={{header|Wren}}==
{{libheader|Wren-fmt}}
<syntaxhighlight lang="
var urlDecode = Fn.new { |enc|
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