woothee: Woothee Lua-nginx-module-lua implementation

Installation

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CentOS/RHEL 7 or Amazon Linux 2

yum -y install https://extras.getpagespeed.com/release-latest.rpm
yum -y install lua-resty-woothee

CentOS/RHEL 8+, Fedora Linux, Amazon Linux 2023

yum -y install https://extras.getpagespeed.com/release-latest.rpm
yum -y install lua5.1-resty-woothee

To use this Lua library with NGINX, ensure that nginx-module-lua is installed.

This document describes lua-resty-woothee v1.12.0 released on Oct 13 2021.

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Woothee lua resty

The Lua-Openresty implementation of Project Woothee, which is multi-language user-agent strings parsers.

https://github.com/woothee/woothee

Synopsis

Basic Usage

server {
    location /test {
        content_by_lua_block {
            local woothee = require "resty.woothee"

            -- parse
            local r = woothee.parse(ngx.var.http_user_agent)
            --  => {"name": "xxx", "category": "xxx", "os": "xxx", "version": "xxx", "vendor": "xxx"}

            -- crawler?
            local crawler = woothee.is_crawler(ngx.var.http_user_agent)
            --  => true

            ngx.header.content_type = "text/plain"
            ngx.say(r.name)
        }
    }
}

Include Nginx Log

log_format woothee_format
                  '$remote_addr - $remote_user [$time_local] '
                  '"$request" $status $body_bytes_sent '
                  '"$http_referer" "$http_user_agent" '
                  '"$x_wt_name" "$x_wt_category" "$x_wt_os" "$x_wt_version" "$x_wt_vendor" "$x_wt_os_version"'
                  ;

server {

    access_log /var/log/nginx/nginx-access-woothee.log woothee_format;

    # set nginx valiables
    set $x_wt_name       '-';
    set $x_wt_category   '-';
    set $x_wt_os         '-';
    set $x_wt_version    '-';
    set $x_wt_vendor     '-';
    set $x_wt_os_version '-';

    location /test {
        content_by_lua_block {
            local woothee = require "resty.woothee"
            local r = woothee.parse(ngx.var.http_user_agent)
            -- set nginx valiables
            ngx.var.x_wt_name       = r.name
            ngx.var.x_wt_category   = r.category
            ngx.var.x_wt_os         = r.os
            ngx.var.x_wt_version    = r.version
            ngx.var.x_wt_vendor     = r.vendor
            ngx.var.x_wt_os_version = r.os_version

            ngx.header.content_type = "text/plain"
            ngx.say(r.name)
        }
    }
}

Forward Backend Server

server {

    # set nginx valiables
    set $x_wt_name       '-';
    set $x_wt_category   '-';
    set $x_wt_os         '-';
    set $x_wt_version    '-';
    set $x_wt_vendor     '-';
    set $x_wt_os_version '-';

    location /test {
        rewrite_by_lua_block {
            local woothee = require "resty.woothee"
            local r = woothee.parse(ngx.var.http_user_agent)
            -- set nginx valiables
            ngx.var.x_wt_name       = r.name
            ngx.var.x_wt_category   = r.category
            ngx.var.x_wt_os         = r.os
            ngx.var.x_wt_version    = r.version
            ngx.var.x_wt_vendor     = r.vendor
            ngx.var.x_wt_os_version = r.os_version
        }

        proxy_pass http://backend-server/;
        # proxy set header
        proxy_set_header X-WT-NAME       $x_wt_name;
        proxy_set_header X-WT-CATEGORY   $x_wt_category;
        proxy_set_header X-WT-OS         $x_wt_os;
        proxy_set_header X-WT-VERSION    $x_wt_version;
        proxy_set_header X-WT-VENDOR     $x_wt_vendor;
        proxy_set_header X-WT-OS-VERSION $x_wt_os_version;
    }
}

For Developer (on Docker)

docker run & run test

make local-all

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GitHub

You may find additional configuration tips and documentation for this module in the GitHub repository for nginx-module-woothee.