Add referer header to Nominatim requests (v4) #416
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Per the [Nominatim usage policy][1], all requests should have an identifying Referer or User-Agent header (quoted below). Using the host name, as we already do for Mapbox requests, should be sufficient to satisfy the requirement while avoiding the need for additional settings. > Provide a valid HTTP Referer or User-Agent identifying the > application (stock User-Agents as set by http libraries will not do). [1]: https://operations.osmfoundation.org/policies/nominatim/
An openstreetmap.org system administrator recommended we include an app identifier in the User-Agent header. My inference is that they block based on the User-Agent. However, I did not want to use only the app identifier so I found the form that Craft uses and copied that, appending the app identifier.
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Per the Nominatim usage policy, all requests should have an identifying Referer or User-Agent header (quoted below). Using the host name, as we already do for Mapbox requests, should be sufficient to satisfy the requirement while avoiding the need for additional settings.
Based on a recommendation from an openstreetmap.org system administrator, I also added the identifier to the User-Agent header. My inference was that they block requests using it and having an app identifier would make it less likely we are blocked by another user that happens to be using the same User-Agent.