match multiple slashes in url, but not in protocol

Question

i try to catch multiple slashes at the ende or inside of url, but not those slashes (which could be two or more), which are placed after protocol (http://, https://, ftp:// file:///)

i tried many findings in similar SO-threads, like ^(.*)//+(.*)$ or [^:](\/{2,}), or ^(.*?)(/{2,})(.*)$ in http://www.regexr.com/, https://regex101.com and http://www.regextester.com/. But nothing worked clear for me.

Its pretty weird, that i can't find a working example - this goal isn't such rar. Could somebody share a working regex?

@anubhava: no:( tested with the three sites i cited above, doesn't work. Tried to escape slahes - same, doesn't work. — Evgeniy, Jul 19 '16 at 11:29
Here, [`(?:https?|ftps?|file)://(*SKIP)(*F)|//`](https://regex101.com/r/lN7mB8/1) - not sure it will work in htaccess, anubhava will help you better with this — Wiktor Stribiżew, Jul 19 '16 at 11:29
@WiktorStribiżew, no:( error: https://regex101.com/r/nF5mI1/1 — Evgeniy, Jul 19 '16 at 11:31
@ChillyBang: You chose a wrong regex delimiter - it works. See [this](https://regex101.com/r/nF5mI1/2), but I doubt it will work in htaccess, I am out. — Wiktor Stribiżew, Jul 19 '16 at 11:31
@WiktorStribiżew with this delimiter it matches only two slashes. And: how should such delimiters be added to `RewriteCond`? — Evgeniy, Jul 19 '16 at 11:33
I suggested that before you said you need it for htaccess. I have no clue, sorry. — Wiktor Stribiżew, Jul 19 '16 at 11:34
@anubhava i try to redirect everything with more then one slash to canonical url notation — Evgeniy, Jul 19 '16 at 11:34
`RewriteCond` doesn't match against `http://` or `ftp://` and absolutely no way against `file:///` — anubhava, Jul 19 '16 at 11:34
@anubhava sure, it can't, but regex could catch the combination of `:/`, which will not happen inside or at the end of urls. Thats the idea behind: to catch all multiple slashes, where doesn't stays a `:` before — Evgeniy, Jul 19 '16 at 11:36
No actually `RewriteCond` compares only part after `http://` in `RewriteCond %{THE_REQUEST}` OR `RewriteCond %{REQUEST_URI}`. See my answer below — anubhava, Jul 19 '16 at 11:43

score 3 · Accepted Answer · answered Jul 19 '16 at 11:38

Here is a rule that you can use in your site root .htaccess to strip out multiple slashes anywhere from input URLs:

RewriteEngine On

RewriteCond %{THE_REQUEST} //
RewriteRule ^.*$ /$0 [R=301,L,NE]

THE_REQUEST variable represents original request received by Apache from your browser and it doesn't get overwritten after execution of some rewrite rules. Example value of this variable is GET /index.php?id=123 HTTP/1.1.

Pattern inside RewriteRule automatically converts multiple slashes into single one.

does it work only on the url's end? your rule for multiple slashes in the middle of url has other look: http://stackoverflow.com/a/21513277/1992004 — Evgeniy, Jul 19 '16 at 11:47

match multiple slashes in url, but not in protocol

1 Answers1