Ο κόσμος των Regular Expressions

[Aztec]

Παραθέτω ένα regular expression που βρίσκεται στη man page της PROCMAILRC

 

(^(Mailing-List:|Precedence:.*(junk|bulk|list)|To: Multiple

recipients of |(((Resent-)?(From|Sender)|X-Envelope-From):|>?From

)([^>]*[^(.%@a-z0-9])?(Post(ma?(st(e?r)?|n)|office)|(send)?Mail(er)?

daemon|m(mdf|ajordomo)|n?uucp|LIST(SERV|proc)|NETSERV|o(wner|ps)

|r(e(quest|sponse)|oot)|b(ounce|bs\.smtp)|echo|mirror|s(erv(ices?|er)

|mtp(error)?|ystem)|A(dmin(istrator)?|MMGR|utoanswer))(([^).!:a-

z0-9][-_a-z0-9]*)?[%@>\t ][^<)]*(\(.*\).*)?)?$([^>]|$)))

 

Ώρες ώρες δεν ξέρω αλλα χάνομαι

[subdee]

Ανγνώσιμο είναι.

Έχω δεί και χειρότερα.

 

Μπορώ να πώ είμαι λάτρης των regex.

[Aztec]

Some people, when confronted with a problem, think "I know, I'll use regular expressions." Now they have two problems

 

Jamie Zawinski

 

Θα συμφωνήσω μαζί του όσον αφορά το maintenance του regexp-based κώδικα.

[subdee]

Ε τότε πάρε να γουστάρεις το regex για email address validation σύμφωνα με το RFC-822 όπως υπάρχει εδώ:

 

>
(??:\r\n)?[ \t])*(??:(?:[^()<>@,;:\\".\[\] 
\000-\031]+(??:(?:\r\n)?[ \t] 
)+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(??:\r\n)?[ 
\t]))*"(??: \r\n)?[ \t])*)(?:\.(??:\r\n)?[ 
\t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(??:( ?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(??:\r\n)?[ 
\t]))*"(??:\r\n)?[ \t])*))*@(??:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\0 31]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\ 
](??:\r\n)?[ \t])*)(?:\.(??:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+ (??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?: 
(?:\r\n)?[ \t])*))*|(?:[^()<>@,;:\\".\[\] \000-\031]+(??:(?:\r\n)?[ 
\t])+|\Z |(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(??:\r\n)?[ 
\t]))*"(??:\r\n) ?[ \t])*)*\<(??:\r\n)?[ 
\t])*(?:@(?:[^()<>@,;:\\".\[\] \000-\031]+(??:(?:\ r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](??:\r\n)?[ 
\t])*)(?:\.(??:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(??:(?:\r\n) ?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](??:\r\n)?[ 
\t] )*))*(?:,@(??:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](??:\r\n)?[ 
\t])* )(?:\.(??:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(??:(?:\r\n)?[ \t] 
)+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](??:\r\n)?[ 
\t])*))*) *?:(?:\r\n)?[ \t])*)?(?:[^()<>@,;:\\".\[\] 
\000-\031]+(??:(?:\r\n)?[ \t])+ 
|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(??:\r\n)?[ 
\t]))*"(??:\r \n)?[ \t])*)(?:\.(??:\r\n)?[ 
\t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(??:(?: \r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(??:\r\n)?[ \t 
]))*"(??:\r\n)?[ \t])*))*@(??:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031 ]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\]( 
??:\r\n)?[ \t])*)(?:\.(??:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(? ?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?? 
:\r\n)?[ \t])*))*\>(??:\r\n)?[ \t])*)|(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?? ?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(??:\r\n)? [ 
\t]))*"(??:\r\n)?[ \t])*)*?:(?:\r\n)?[ 
\t])*(??:(?:[^()<>@,;:\\".\[\] \000-\031]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]| \\.|(??:\r\n)?[ 
\t]))*"(??:\r\n)?[ \t])*)(?:\.(??:\r\n)?[ \t])*(?:[^()<> 
@,;:\\".\[\] \000-\031]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|" (?:[^\"\r\\]|\\.|(??:\r\n)?[ 
\t]))*"(??:\r\n)?[ \t])*))*@(??:\r\n)?[ \t] )*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(??:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\ 
".\[\]]))|\[([^\[\]\r\\]|\\.)*\](??:\r\n)?[ \t])*)(?:\.(??:\r\n)?[ 
\t])*(? :[^()<>@,;:\\".\[\] \000-\031]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[ 
\]]))|\[([^\[\]\r\\]|\\.)*\](??:\r\n)?[ 
\t])*))*|(?:[^()<>@,;:\\".\[\] \000- \031]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|( ??:\r\n)?[ 
\t]))*"(??:\r\n)?[ \t])*)*\<(??:\r\n)?[ \t])*(?:@(?:[^()<>@,; 
:\\".\[\] \000-\031]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([ 
^\[\]\r\\]|\\.)*\](??:\r\n)?[ \t])*)(?:\.(??:\r\n)?[ 
\t])*(?:[^()<>@,;:\\" .\[\] \000-\031]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\ 
]\r\\]|\\.)*\](??:\r\n)?[ \t])*))*(?:,@(??:\r\n)?[ 
\t])*(?:[^()<>@,;:\\".\ [\] \000-\031]+(??:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\ 
r\\]|\\.)*\](??:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ 
\t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\] 
|\\.)*\](?:(?:\r\n)?[ \t])*))*)*:(?:(?:\r\n)?[ 
\t])*)?(?:[^()<>@,;:\\".\[\] \0 00-\031]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\ .|(?:(?:\r\n)?[ 
\t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@, 
;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(? :[^\"\r\\]|\\.|(?:(?:\r\n)?[ 
\t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])* (?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\". 
\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ 
\t])*(?:[ ^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\] 
]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*\>(?:(?:\r\n)?[ 
\t])*)(?:,\s*( ?:(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\ ".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ 
\t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:( ?:\r\n)?[ 
\t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[ 
\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ 
\t]))*"(?:(?:\r\n)?[ \t ])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t 
])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ 
\t])*)(? :\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t])+| 
\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ 
\t])*))*|(?: [^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\".\[\ ]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ 
\t]))*"(?:(?:\r\n)?[ \t])*)*\<(?:(?:\r\n) ?[ 
\t])*(?:@(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\[" 
()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ 
\t])*)(?:\.(?:(?:\r\n) ?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<> 
@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ 
\t])*))*(?:,@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@, 
;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ 
\t])*)(?:\.(?:(?:\r\n)?[ \t] )*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\ 
".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*)*:(?:(?:\r\n)?[ 
\t])*)? (?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ 
\t])+|\Z|(?=[\["()<>@,;:\\". \[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ 
\t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?: \r\n)?[ 
\t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\[ 
"()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ 
\t]))*"(?:(?:\r\n)?[ \t]) *))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t]) 
+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ 
\t])*)(?:\ .(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
\000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z 
|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ 
\t])*))*\>(?:( ?:\r\n)?[ \t])*))*)?;\s*)

[Aztec]

Χαίρομαι που επιβεβαιώνεις την άποψη μου

[gtroza]

γραμμική γάματα !

.