Google support eTag?

[Artience]

Hello~ People!

I have a questions regarding eTag.

I know Google support If-Modified-HTTP-Header aka last modified header.

I used eTag instead of last modified header.

It seems like Google does support, yet here is my questions.

code.google suggest as following.

GData-Version: 2.0
ETag: "C0QBRXcycSp7ImA9WxRVFUk."

but I used etag as following .

ETag: "10cd712-eaae-b279a480"

I didnt include "GData-Version: 2.0". is this mean Google may not support my etag?

[KeriMorgret]

I'm seeing another place where Google doesn't reference the Gdata in code.google.com. Check out http://code.google.com/apis/storage/docs/reference-headers.html#etag.

In API changelog documentation for their calendar http://code.google.com/apis/calendar/changelog.html they say "If a client wishes to retain version 2.0 error behavior, then it can either send a request with the Gdata-Version: 2.0 HTTP header or append ?v=2.0 to request URIs. In this case, no error will be provided if an outdated updated-min parameter is provided or if a gCal:eid conflict occurs when inserting a recurrence exception. However, the server response docuement will still conform to version 2.1 and contain a Gdata-Version: 2.1 header."

It seems like you're fine, as most of the references I'm seeing Google made don't include that GData info.