How to call V8js to execute JS in curl.

How to call V8js to execute JS in curl.
Want to use Curl call Baidu Map API positioning, but Baidu Map API is to execute JS to locate.

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How to call V8js to execute JS in curl.
Want to use Curl call Baidu Map API positioning, but Baidu Map API is to execute JS to locate.

Baidu Map API positioning roughly three kinds of ideas
1. Call device GPS via browser to locate
2. Positioning via mobile network base station
3. Positioning via IP

I read the main question is to call Baidu API on the PC to locate, then only the third method can only go.
Altogether is through the IP location, why not directly call Baidu's IP to geo-location API it?
Http://developer.baidu.com/map/index.php?title=webapi/ip-api

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