Accessing $arg_PARAMETER for parameter with in it

Server NGINX
1

Hi,

I have a query string parameter that has a dot in it. For example,
a.b. I need to write this parameter to my log file. How do I
reference it?

I’ve tried $arg_a.b but that prints -.b (ie, it prints the value of
$arg_a which is - followed by .b)

I’ve also tried $arg_a_b but that just prints - since there is no
parameter a_b or a-b.

What should I do?

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2

I’ve also tried ${arg_a.b} and nginx -t tells me that the closing
bracket in “arg_a” variable is missing

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3

Hello!

On Wed, Jul 11, 2012 at 01:39:19AM -0400, bluesmoon wrote:

parameter a_b or a-b.

What should I do?

The $arg_* variables won’t allow you to access request arguments with
characters not allowed in variable names.

If you really need to, you may parse $args yourself, e.g. with
map{} directive using regular expressions. Something like this
should work:

map $args $ab {
    "~(?:^|[&;])a[.]b=(?<foo>[^&;]*)"  $foo;
}

Maxim D.

4

Maxim D. Wrote:

If you really need to, you may parse $args
yourself, e.g. with
map{} directive using regular expressions.

thanks, I’ll try that.

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