Apache rewrite_rule for angularjs

Question

I have this rule in Angularjs app. It work perfectly. But I want to understand one rule which I don't know what it does RewriteRule ^.*$ - [NC,L] #???

RewriteEngine on
RewriteBase /

RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d [OR]
RewriteCond %{REQUEST_FILENAME} -!f 
RewriteRule ^.*$ - [NC,L] #NC none-case-sensitive, L stop when match
RewriteRule ^(.*) index.html [NC,L]

Please help me on this rule RewriteRule ^.*$ - [NC,L] I know about the [NC,L] flags but I don't get ^.*$ - especially the empty dash at the end of rule.

Ortomala Lokni · Accepted Answer · 2018-07-27 16:29:53Z

1

+50

The syntax of the RewriteRule is:

RewriteRule Pattern Substitution [flags]

Your rule is:

RewriteRule ^.*$ - [NC,L]

^.*$ is a perl compatible regular expression where
- ^ is the start of string
- . is any character except newline
- * means 0 or more times
- $ is the end of string.
The substiution is - which means: "no substitution should be performed (the existing path is passed through untouched). This is used when a flag needs to be applied without changing the path."
The flags are NC and L, which means:
- NC: Makes the pattern comparison case-insensitive.
- L: Stop the rewriting process immediately and don't apply any more rules. Especially note caveats for per-directory and .htaccess context (see also the END flag).

So this rule matches anything, makes no substitution, and stops the rewriting process immediately.

edited Jul 27, 2018 at 16:29

answered Jul 27, 2018 at 16:22

Ortomala Lokni

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2 Comments

praHoc Over a year ago

Thank you for response. Then, Can I say that the last rule RewriteRule ^(.*) index.html [NC,L] never get match as this rule ^.*$ matches anything?

Ortomala Lokni Over a year ago

Yes, the pattern ^.*$ in combination with the flag L, make all subsequent rules not applied.

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