152 lines
4.0 KiB
Ruby
152 lines
4.0 KiB
Ruby
# frozen_string_literal: true
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require 'maxminddb'
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require 'resolv'
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class DiscourseIpInfo
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include Singleton
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def initialize
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open_db(DiscourseIpInfo.path)
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end
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def open_db(path)
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@loc_mmdb = mmdb_load(File.join(path, 'GeoLite2-City.mmdb'))
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@asn_mmdb = mmdb_load(File.join(path, 'GeoLite2-ASN.mmdb'))
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@cache = LruRedux::ThreadSafeCache.new(2000)
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end
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def self.path
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@path ||= File.join(Rails.root, 'vendor', 'data')
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end
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def self.mmdb_path(name)
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File.join(path, "#{name}.mmdb")
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end
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def self.mmdb_download(name)
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if GlobalSetting.maxmind_license_key.blank?
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STDERR.puts "MaxMind IP database updates require a license"
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STDERR.puts "Please set DISCOURSE_MAXMIND_LICENSE_KEY to one you generated at https://www.maxmind.com"
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return
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end
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FileUtils.mkdir_p(path)
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url = "https://download.maxmind.com/app/geoip_download?license_key=#{GlobalSetting.maxmind_license_key}&edition_id=#{name}&suffix=tar.gz"
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gz_file = FileHelper.download(
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url,
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max_file_size: 100.megabytes,
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tmp_file_name: "#{name}.gz",
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validate_uri: false,
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follow_redirect: false
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)
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filename = File.basename(gz_file.path)
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dir = "#{Dir.tmpdir}/#{SecureRandom.hex}"
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Discourse::Utils.execute_command(
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"mkdir", "-p", dir
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)
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Discourse::Utils.execute_command(
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"cp",
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gz_file.path,
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"#{dir}/#{filename}"
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)
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Discourse::Utils.execute_command(
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"tar",
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"-xzvf",
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"#{dir}/#{filename}",
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chdir: dir
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)
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Dir["#{dir}/**/*.mmdb"].each do |f|
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FileUtils.mv(f, mmdb_path(name))
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end
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ensure
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FileUtils.rm_r(dir, force: true) if dir
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gz_file&.close!
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end
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def mmdb_load(filepath)
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begin
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MaxMindDB.new(filepath, MaxMindDB::LOW_MEMORY_FILE_READER)
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rescue Errno::ENOENT => e
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Rails.logger.warn("MaxMindDB (#{filepath}) could not be found: #{e}")
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nil
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rescue => e
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Discourse.warn_exception(e, message: "MaxMindDB (#{filepath}) could not be loaded.")
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nil
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end
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end
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def lookup(ip, locale: :en, resolve_hostname: false)
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ret = {}
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return ret if ip.blank?
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if @loc_mmdb
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begin
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result = @loc_mmdb.lookup(ip)
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if result&.found?
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ret[:country] = result.country.name(locale) || result.country.name
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ret[:country_code] = result.country.iso_code
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ret[:region] = result.subdivisions.most_specific.name(locale) || result.subdivisions.most_specific.name
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ret[:city] = result.city.name(locale) || result.city.name
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ret[:latitude] = result.location.latitude
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ret[:longitude] = result.location.longitude
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ret[:location] = ret.values_at(:city, :region, :country).reject(&:blank?).uniq.join(", ")
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end
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rescue => e
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Discourse.warn_exception(e, message: "IP #{ip} could not be looked up in MaxMind GeoLite2-City database.")
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end
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end
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if @asn_mmdb
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begin
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result = @asn_mmdb.lookup(ip)
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if result&.found?
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result = result.to_hash
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ret[:asn] = result["autonomous_system_number"]
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ret[:organization] = result["autonomous_system_organization"]
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end
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rescue => e
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Discourse.warn_exception(e, message: "IP #{ip} could not be looked up in MaxMind GeoLite2-ASN database.")
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end
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end
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# this can block for quite a while
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# only use it explicitly when needed
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if resolve_hostname
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begin
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result = Resolv::DNS.new.getname(ip)
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ret[:hostname] = result&.to_s
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rescue Resolv::ResolvError
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end
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end
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ret
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end
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def get(ip, locale: :en, resolve_hostname: false)
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ip = ip.to_s
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locale = locale.to_s.sub('_', '-')
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@cache["#{ip}-#{locale}-#{resolve_hostname}"] ||=
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lookup(ip, locale: locale, resolve_hostname: resolve_hostname)
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end
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def self.open_db(path)
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instance.open_db(path)
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end
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def self.get(ip, locale: :en, resolve_hostname: false)
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instance.get(ip, locale: locale, resolve_hostname: resolve_hostname)
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end
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end
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