Decode HTML entities with Regex

Question

I've a large amount of encoded text, like this:

&#60;div id&#61;&#34;readingPaneContentContainer&#34; class&#61;&#34;ClearBoth&#34;  cmp&#61;&#34;cmp&#34; ulr&#61;&#34;ulr&#34;&#62;&#60;a id&#61;&#34;rpFocusElt&#34; href&#61;&#34;javascript&#58;void&#40;0&#41;&#59;&#34; style&#61;&#34;height&#58;1px&#59;width&#58;1px&#59

I would like de-encode all, so to have (Example):

<div id="readingPaneContentContainer" class="ClearBoth".....

Is possible to do with Regular Expressions?

Any help would be appreciated.

Luca

jQuery, but i think that will don't change anything..correct? — Luca
– Luca, Commented Mar 29, 2013 at 15:45
regex implementation is different in different languages. Also it makes a difference to how one repesents the entites in unicode. — Boris the Spider
– Boris the Spider, Commented Mar 29, 2013 at 15:48
Possibly of interest - RegEx match open tags except XHTML self-contained tags — Dan Pichelman
– Dan Pichelman, Commented Mar 29, 2013 at 15:49
@DanPichelman : This regex wouldn't replace encoded tags but match only existent (Not encoded). — Luca
– Luca, Commented Mar 29, 2013 at 15:53

Community · Accepted Answer · 2017-05-23 11:57:27Z

1

See this thread - it has your solution for jQuery that works perfectly:

How to decode HTML entities using jQuery?

var encoded = '&#60;div id&#61;&#34;readingPaneContentContainer&#34; class&#61;&#34;ClearBoth&#34;  cmp&#61;&#34;cmp&#34; ulr&#61;&#34;ulr&#34;&#62;&#60;a id&#61;&#34;rpFocusElt&#34; href&#61;&#34;javascript&#58;void&#40;0&#41;&#59;&#34; style&#61;&#34;height&#58;1px&#59;width&#58;1px&#59';

var decoded = $("<div/>").html(encoded).text();

Does not use regex.

edited May 23, 2017 at 11:57

CommunityBot

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answered Mar 29, 2013 at 16:25

methai

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2 Comments

Luca Over a year ago

Works fine, but to maintain the tag must be removed .text() Thanks you

Viesturs Over a year ago

This is really slow compared to regexp

Loamhoof · Accepted Answer · 2013-03-29 16:24:56Z

0

Something along the lines of:

var regex = /&#(\d{2});/g;
var match;
while(match = regex.exec(myString)) {
    match = match[1];
    myString = myString.substring(0, regex.lastIndex - 5) + convert[match] + myString.substring(regex.lastIndex);
}

might work but there must be better solutions (considering convert is an object that makes the conversion, eg 80: '<').

Explaination: regex.exec with a 'global' flag allows looping through the regex, regex.lastPoint's value being the pointer to the rest of the string (not being tested yet).

Edit:
Working.

edited Mar 29, 2013 at 16:24

answered Mar 29, 2013 at 15:55

Loamhoof

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3 Comments

Loamhoof Over a year ago

Sorry parenthesis error in the regex, I changed it, maybe try again (I'll run some tests myself).

Luca Over a year ago

Now i get the following error: convert is not defined Thanks you for the help ;)

Loamhoof Over a year ago

Quote: (considering convert is an object that makes the conversion, eg 80: '<') You have to build this map before doing it. Anyway doing it with jQuery is a safer and easier way.

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