JSLint reports "Insecure ^" for my regex -- what does that mean?
I'm trying to get my Javascript code 100% JSLint clean.
I've got a r开发者_Go百科egular expression:
linkRgx = /https?:\/\/[^\s;|\\*'"!,()<>]+/g;
JSLint reports:
Insecure '^'
What makes the use of the negation of the character set "insecure" ?
[^\s;|\\*'"!,()<>]
matches any ASCII character other than the ones listed, and any non-ASCII character. Since JavaScript strings are Unicode-aware, that means every character known to Unicode. I can see a lot of potential for mischief there.
Rather than disable the warning, I would rewrite the character class to match the characters you do want to allow, as this regex from the Regular Expressions Cookbook does:
/\bhttps?:\/\/[-\w+&@#/%?=~|$!:,.;]*[\w+&@#/%=~|$]/g
(answering my own question) I did some digging... JSLint documentation says:
Disallow insecure . and [^...]. in /RegExp/ regexp: true if . and [^...] should not be allowed in RegExp literals. These forms should not be used when validating in secure applications.
What I have done is disable the JSLint error for the offending line (as I'm not dealing with needing to be secure from potentially malicious user input:
/*jslint regexp: false*/
.... Javascript statement(s) ....
/*jslint regexp: true*/
You should use:
/*jslint regexp: true*/
linkRgx = /https?:\/\/[^\s;|\\*'"!,()<>]+/g;
/*jslint regexp: false*/
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