Google API for location, based on user IP address

[user2538596 via StackOverflow]

i am looking for an APi which could return back user's current location(city) based on it's IP adress.i searched for it and found

http://freegeoip.net/json

But my client is a big time Google Fan and is insisting only for any available Google API, can some one help me out with this.

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http://stackoverflow.com/questions/17402103/google-api-for-location-based-on-user-ip-address

[Peter Knego via StackOverflow]

Google already appends location data to all requests coming into GAE (see Request Header documentation for go, java, php and python). You should be interested X-AppEngine-Country, X-AppEngine-Region, X-AppEngine-City and X-AppEngine-CityLatLong headers.

An example looks like this:

X-AppEngine-Country:US
X-AppEngine-Region:ca
X-AppEngine-City:norwalk
X-AppEngine-CityLatLong:33.902237,-118.081733

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