Say You visit Groupon from the entry point Agoura Hills, CA - how can Groupon go about referencing that urban to the nearest City that has met (g Los Angeles) and Options that as the end?
选择最短时间,是否占用了排位/远离地点和计算与所有现有城市的距离? 如果是的话,你们能从哪里获得像每个城市那样的相对/长期数据,或为此目的开立的皮?
Groupon seems to use limelightnetworks as their CDN provider and most CDNs due to their distributed nature having some kind of geo-location database which they can map the request which is coming from the region. At the CDN s hands those information is easy, and site can be work with that information further. All that would be required is someway for the DNS to inform the server and this is not a new concept.
There is a also a geolocation API spec, which would allow browsers/clients to send information about the users location to the server (which the server can use for customization). Those act number of factors such as DNS, your wireless AP, etc. But that is still in draft stage and some google services use it and it requires browser support too.
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