Rails 如何实现通过登录IP确定城市功能

对于Rails而言，主流方式应该是使用google库的插件geoip
github地址如下

  require 'geoip'
  GeoIP.new('GeoLiteCity.dat').country('www.atlantis.sk')
  => ["www.atlantis.sk", "217.67.18.26", "SK", "SVK", "Slovakia", "EU", "02", "Bratislava", "", 48.15, 17.1167, nil, nil, "Europe/Bratislava"]

  Returned values are the requested hostname, the IP address as a dotted quad,
  Maxmind's country code, the ISO3166-1 country code, the ISO3166-2 country code,
  the ISO3166 country name, and the continent code.

  GeoIP.new('GeoCity.dat').city('github.com')
  => ["github.com", "207.97.227.239", "US", "USA", "United States", "NA", "CA", "San Francisco", "94110", 37.7484, -122.4156, 807, 415, "America/Los_Angeles"]

  Returned values are the country values followed by region or state name,
  city name, postal_code/zipcode, latitude, longitude, USA DMA code, USA area code,
  timezone name. Sorry it's not a Hash... historical.

  GeoIP.new('GeoIPASNum.dat').asn("www.fsb.ru")
  => ["AS8342", "RTComm.RU Autonomous System"]

另外一个 geo_ip

使用如下：

  GeoIp.geolocation(ip_address)

  # 209.85.227.104 = google.be (US)
  GeoIp.geolocation('209.85.227.104')
#returns:

  {
    :status           =>"OK",
    :ip               =>"209.85.227.104"
    :country_code     =>"US",
    :country_name     =>"United States",
    :region_code      =>"06",
    :region_name      =>"California",
    :city             =>"Mountain View",
    :zip_postal_code  =>"94043",
    :latitude         =>"37.4192",
    :longitude        =>"-122.057"
  }

geokit是一个关于地理的工具，比如根据经纬度确定城市和距离之类

#Find near latitude and longitude:
Store.find(:all, :origin =>[37.792,-122.393], :within=>10)
#Find near an address:
Store.find(:all, :origin=>'100 Spear st, San Francisco, CA', :within=>10)
#Order by distance from the center of a zipcode:
Store.find(:all, :origin=>'94117', :within=>10,
           :order=>'distance asc')
#Combine distance conditions with regular conditions
Store.find(:all, :origin=>'94117', :within=>10, 
           :conditions=>{:store_type=>'CAFE'})

一个是通过网络的IP查询API，这个办法IP库更新比较快。通用的库有几个比如google。
xml处理页面完全可以通过nokogiri等专门处理工具代替

提供IP地址查询的API很多比如网易
http://www.youdao.com/smartresult-xml/search.s?type=ip&q=IP地址

require 'net/http'
require 'rexml/document'
include REXML

class MapsController < ApplicationController
	def index
		@location = locateIp()
        end

	def locateIp
		#ip = "123.123.123.123";
		ip = request.remote_ip
		ips = ip.to_s
		url = "http://ipinfodb.com/ip_query.php?ip="+ips+"&timezone=false"

		xml_data = Net::HTTP.get_response(URI.parse(url)).body

                xmldoc = REXML::Document.new(xml_data)

		# Now get the root element
		root = xmldoc.root
		city = ""
		regionName = ""
		countryName = ""

		# This will take country name...
		xmldoc.elements.each("Response/CountryName") {
		|e| countryName << e.text
	         }

		# Now get city name...
		xmldoc.elements.each("Response/City") {
   		|e| city << e.text
	        }

		# This will take regionName...
		xmldoc.elements.each("Response/RegionName") {
   		|e| regionName << e.text
	        }

     	       ipLocation = city +", "+regionName+", "+countryName

               return ipLocation

        end  #end of method locateIp

end

评论

2 楼 fireflyman 2010-11-04  

1 楼 qichunren 2010-08-25  

支持！