问题
If you need to locate a user based on their IP address, what services are available (free and not free services are fine)?
P.S. I understand that some users use proxies etc., that means the result is not 100% accurate. That's ok.
回答1:
Most geolocation services allow you to download a database full of IP Address to city or country maps. Some also provide web service apis for free (limited number of requests) or a paid subscription.
MaxMind has one such service that you can use which is free to determine the user's location. Their minFraud service allows 500 free queries per day.
A sample for their web service in ASP
Dim objHttp, strQuery
strQuery = "http://geoip1.maxmind.com/a?l=" & license_key & _
"&i=" & ipaddress
set objHttp = Server.CreateObject("Msxml2.ServerXMLHTTP")
objHttp.open "GET", strQuery, false
objHttp.send
Response.Write objHttp.ResponseText
Set objHttp = Nothing
They also offer APIs for determing credit card fraud probability based on location, card number, etc, in their paid version.
Another service is ip2location. John Millikin
Also, IPLigence offers 50 free queries a day.
For .NET Coders, there is the IPAdressExtensions module (open source, free and no web service required) purekrome
More info about geolocation is available on wikipedia.
回答2:
It's also worth noting that MaxMind allow you to download their geolocation database as a CSV file:
- http://www.maxmind.com/app/geolitecity
回答3:
Easy -> I made a .NET extension method a while back. It's all wrapped up in a single DLL that u can use and reference. it doesn't require ANY WEB SERVICE or 3rd party external API call.
it's also free.
it's also open source. blah blah blah.
Enjoy!
It's called IPAddressExtensions and it's on Codeplex.
回答4:
I have used hostip.info to grab client location informaion when forms are submitted on some of my aspx pages. Here is a blog entry I wrote on it a while back www.fencerowproductions.com
回答5:
Geolocation with ClientLocation generally works and you get it free when you use Google's JSAPI.
- Demo site
回答6:
There was a brilliant solution using those adult ads ie. "women in YOUR_TOWN would like to 'meet' you tonight"
Somebody worked out a way to extract the location string without loading the ad.
I can't find the code, searching google for adult ads isn't terribly effective, but somebody here might remember it.
回答7:
For a paid product, you could look at CountryHawk from cyScape.
I can't vouch for this product personally, but we use their BrowserHawk product for browser and connection speed detection (eg to optimise video streaming) and haven't had any problems with it.
回答8:
Here's another free service: http://www.webservicex.net/WCF/ServiceDetails.aspx?SID=46
WebserviceX.NET provide quite a few different free web services.
回答9:
I recommend userlocation.com. It's easy to use and affordable and it's quite accurate.
回答10:
Easy intro to using MaxMinds downloadable database in PHP Geolocation
回答11:
this site uses maxminds free product - its a decent showcase - http://www.ipaddress1.com/
来源：https://stackoverflow.com/questions/37015/what-services-can-i-used-to-find-a-users-location-based-on-their-ip-address