Overpass API developpement

["sly (sylvain letuffe)" <>]

Le jeudi 30 avril 2015 18:54:58, mmd a écrit :
> by coincidence, this object is also queried, when calling the /api/ping
> endpoint: see http://overpass-api.de/api/ping in the "meta request"
> section of the result.

Or this might well not be a coïncidence after all...

I was checking apache's error log of the api.openstreetmap.fr public instance 
and found lots (at a rate of around one every 5 minutes) of lines like this :

[client 74.86.158.107] 2015-05-03 09:12:26 URL:http://overpass-
api.de/api/interpreter?data=%3Cquery%20type='way'%3E%3Chas-
kv%20k='name'%20v='Lipkenskothen'/%3E%3C/query%3E%3Cprint%20mode='meta'/%3E%3Crecurse%20type='way-
node'/%3E%3Cprint%20mode='meta'/%3E [1984] -> "/tmp/ping.xml" [1]



Wondering what that was I confirmed the originated IP to be from 
http://uptimerobot.com (a service uptime checker)

Which made our server to query the overpass-api.de instance because of 
hardcoded url in :
https://github.com/drolbr/Overpass-API/blob/master/src/cgi-bin/ping


Which mean I might be one of the unknowing cuplrit ;-)


> Maybe some system admins may have chosen to include this ping url in
> their availability monitoring, in particular for their own Overpass API
> instance.

Truly possible, or some people around here willing to known how frech is an 
instance falsy used the /ping call for that (without telling the service 
admin) !

> ps: This script is also mentioned in the OSM wiki [1], but I don't know
> if it is part of the official API or if it could be simply blocked to
> avoid unnecessary load from the outside world.

I think it would be better, until we upgrade that call to query the local 
instance.

But since the interpreter binary is in the same directory, it wasn't too hard 
to patch ping in order to query the local interpreter instead of wgeting the 
distant interpreter :
https://github.com/osm-fr/Overpass-API/blob/master/src/cgi-bin/ping

But I remember roland saying that most of those shell scripts should probably 
be rewritten so I don't know if that change is usefull


-- 
sly (sylvain letuffe)
http://wiki.openstreetmap.org/wiki/User:Sletuffe