Re: regex: chars to escape bsides @

[Reindl Harald]

Am 05.01.2015 um 23:14 schrieb Bowie Bailey:

On 1/5/2015 5:02 PM, Reindl Harald wrote:

Am 05.01.2015 um 22:57 schrieb Bowie Bailey:

On 1/5/2015 4:13 PM, John Hardin wrote:

For example:
  m#http://match/this/url/#

Ouch. # won't work for that (in SA at least) as it comments out the
rest of the RE.

Ack!  Forgot about that minor difference with SA.  # is my general go-to
character for that in normal Perl scripts.

This should illustrate the same point with the minor improvement of
actually *working* in SA:
m^http://match/this/url/^

i would not play such games because it makes it even more likely that
a common escape function is missing something, besides that

header    CUST_MANY_SPAM_TO  X-Local-Envelope-To =~
/^(\<h\.reindl\@thelounge\.net\>)$/i

It is mainly useful for creating a regex to match a URI without needing
to escape every slash in the string.  Trying to sort out something like:
/http:\/\/domain\.com\/xxx\/blah\/blah\// gets old fast.  So you pick a
character that you don't need in the regex and use it as a separator
character instead so you don't need nearly as many escapes.

agreed but normally one would use a common escape function and that becomes complicated if you have to escape different chars here and there

Now that I think about it, there is at least one other character that
needs escaping in a regex: the pipe symbol |

[harry@srv-rhsoft:~]$ php -r "echo preg_quote('|');"
\|

well, that's luckily covered, i only did not expect that i need to handle @ % and # manually especially because @ does not need to be escaped for grep or postfix-pcre rules

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