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A Dancer plugin to include information from App::Cerberus

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README.pod

SYNOPSIS

    use Dancer::Plugin::Cerberus;

    get '/' => sub {
        my $time_zone = vars->{cerberus}{tz}{name};
    };

DESCRIPTION

This plugin adds metadata from an App::Cerberus server to the vars before your route handlers are called.

For instance:

  • Geo-location
  • Time zone
  • User-agent info
  • Are they a spider?
  • Are they making too many requests? Should we throttle them?

It can also be configured to throttle or ban IP address ranges with App::Cerberus::Plugin::Throttle.

CONFIG

The basic configuration (servers and timeout) are passed to "new()" in App::Cerberus::Client.

    plugins:
        Cerberus:
            servers:        http://localhost:5001/

Or

    plugins:
        Cerberus:
            servers:
             -              http://host1:5001/
             -              http://host2:5001/
            timeout:        0.1

If you are using the App::Cerberus::Plugin::Throttle plugin, then you can also configure:

    plugins:
        Cerberus:
            servers:        http://localhost:5001/
            throttle:
                log_as:     info
                enforce:    0 | 1

If log_as is one of core, info, warn, debug or error, then Throttle messages will be logged at that level.

If enforce is true, then banned IP addresses will receive a 403 Forbidden response and throttled users a 503 Service Unavailable response, with a Retry-After: $seconds header.

ACCESSING CERBERUS INFO

The vars available in any route handler will contain a key cerberus with any data that App::Cerberus has returned, for instance:

    get '/' => sub {
        my $geo_info   = vars->{cerberus}{geo};
        my $time_zone  = vars->{cerberus}{tz};
        my $user_agent = vars->{cerberus}{ua};
        my $throttle   = vars->{cerberus}{throttle};
    };

SEE ALSO

SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc Dancer::Plugin::Cerberus

You can also look for information at:

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