Compare no tile headers - ESRI Etag value

[Don-vip]

Following ​https://github.com/osmlab/editor-layer-index/pull/552/files I'm implementing the comparison of "no tile header" between JOSM and ELI.

I have one difference:

* No tile headers differ ('{Etag=[10i954m13i2]}' != '{Etag=["10i954m13i2"]}'): Esri World Imagery - https://{switch:services,server}.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/tile/{zoom}/{y}/{x}

Quotes were added two months ago on JOSM wiki, why? It seems strange. Does ESRI really send quotes?

[Don-vip]

In 15082/josm:

see #17730 - compare no tile headers, refactor

[Klumbumbus]

Replying to Don-vip:

Does ESRI really send quotes?

Seems so:

Before https://josm.openstreetmap.de/wiki/Maps/Worldwide?action=diff&version=47&old_version=46 it didn't work (i.e. grey tiles were still shown in JOSM). I copied that syntax with the ' from the Mapbox Satellite entry.

[Klumbumbus]

Position of screenshot is at ​https://www.openstreetmap.org/way/43917587

[Don-vip]

Thanks. Clickable URL: ​https://server.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/tile/20/352362/561614

[Klumbumbus]

Yes, according the josm tile info window Esri and Mapbox use quotes and others e.g. DigitalGlobe Vivid Imagery not.

[Don-vip]

Indeed it's conform to ​https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag?utm_source=mozilla&utm_medium=devtools-netmonitor&utm_campaign=default#Directives

So ELI is wrong.