caching of Google Places API results

问题:

I'm building a mobile app that lists posts, each post has a place attached to it.

I want the list to be able to show distance from the user's location. without caching anything it would require to store the place reference for each post and while listing fetch the place's geometry from Google Places API, this sounds like a very bad idea.

am I allowed to store the place's id, reference, name and geometry in my db and deliver it with my API? this is for performance purposes only

another implementation might be to cache this data in a local sqlite db on the mobile device, but then the user will have to download the information for each uncached place so for a list of X different places the client will be doing X api calls, sounds slow and battery wasting.

am I allowed to have a central cache in my db in a table that'll be refreshed every once in a while and evicted if not accessed for lets say 30 days ?

回答1:

Google's page on Places states that Caching of the Places ID is allowed.

The terms in 10.5.d state that you may store limited amounts of content for no more than 30 calendar days for performance reasons. Since this is what you are trying to do, then I would expect that you are ok to store the ID, location and name.

As you start to cache more information then you'll breach the terms of the API. It's not too clear what these are but I think as long as you are being reasonable then you'll be OK.

回答2:

As per the current policy, the Place Id is exempt from the caching restriction.

Pre-Fetching, Caching or Storage of contents

Pre-Fetching, Caching, or Storage of Content Applications using the Directions API are bound by the Google Maps Platform Terms of Service. Section 3.2.4(a) of the terms states that you must not pre-fetch, cache, index, or store any Content except under the limited conditions stated in the terms.

Note that the place ID, used to uniquely identify a place, is exempt from the caching restriction. You can therefore store place ID values indefinitely. Place ID values are returned in the place_id field in Directions API responses.