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A new SRC capture is found.

Source: Internet
Author: User
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I felt that the three captures were not very good, so I studied how to use pre-query to achieve the judgment ..CodeAs follows...

 
 
<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<HTML xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> A new SRC capture was found, which was completed by a negative pre-query </title>
</Head>
<Body>
<Textarea id = "WC" style = "width: 500px; Height: 100px;">


 '" src = 1.px>





</Textarea>
<SCRIPT type = "text/JavaScript">
/*
However, for efficiency, $1 $2 $3 is much better than $2, but it is only about % 14-% 8...
/]) +? Src = (['"]?) ([^ \ S> "'] * (? :(?! \ 1). [^ \ s> "'] *) \ 1 (? : "[^"] * "| '[^'] * '| [^"'>]) *>/Ig; // exact mode: $2
/]) +? Src = (? : "([^"] *) "| '([^'] *) '| ([^"' \ S>] *) (? : "[^"] * "| '[^'] * '| [^"'>]) *>/Ig; // exact mode: $1 $2 $3
/] *? Src = (['"]?) ([^ \ S> "'] * (? :(?! \ 1). [^ \ s> "'] *) \ 1 [^>] *>/ig; // get $2 in simple mode
/] *? Src = (? : "([^"] *) "| '([^'] *) '| ([^"' \ S>] *) [^>] *>/ig; // simple mode: $1 $2 $3
-In simple cases, the contents in SRC cannot be correctly captured. (3 quotation marks)
*/
VaR r =/]) +? Src = (['"]?) ([^ \ S> "'] * (? :(?! \ 1). [^ \ s> "'] *) \ 1 (? : "[^"] * "| '[^'] * '| [^"'>]) *>/Ig; // exact mode: $2
 
Document. getelementbyid ('wc '). value. Replace (R, function (L, $1, $2 ){
Alert (L + '\ NSRC = |' + $2 + '| ');
});
</SCRIPT>
</Body>
</Html>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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