"Golang_CSClient/4.0" is used when hitting the store meta/resources endpoint

[Guillermo Gonzalez]

While testing the compat API in charmhub we spotted different User-Agents being used from the same "client", e.g: Golang_CSClient/4.0, Juju/3.0-beta1.

We believe the same UA should be used.

I tracked the CSClient string to: https://github.com/juju/charmrepo/blob/af3d6b52f7de3768ec8b05964e42744857942352/csclient/csclient.go#L41

the access log from that request is:

10.172.66.2 - - [29/Jan/2021:14:43:49 +0000] "GET /charms/v5/postgresql/meta/resources?channel=stable HTTP/1.1" 200 191 "-" "Golang_CSClient/4.0"

to reproduce:

$ juju charm-resources postgresql

We are using: charmstore-url=https://api.staging.charmhub.io/charms, which we believe is not required to reproduce.

[Maximiliano Bertacchini (maxiberta)]

Also, `juju deploy cs:postgresql` produces these logs:

"GET /charms/v5/postgresql/meta/any?include=id&include=supported-series&include=published HTTP/1.1" 200 273 "-" "Golang_CSClient/4.0"
"GET /charms/v5/postgresql-215/archive?channel=stable HTTP/1.1" 302 887 "-" "Golang_CSClient/4.0"
"GET /charms/v5/postgresql-215/meta/resources?channel=stable HTTP/1.1" 200 191 "-" "Golang_CSClient/4.0"

[Heather Lanigan (hmlanigan)]

Working on the juju charm-resources command for charmhub is in play for this cycle. Will take look at changing this at that time. Note: this is a day 1 thing I believe.

I would not expect `juju charm-resources postgresql` to work right now on 2.9 or 3.0-beta1 as it should query charmhub and that has not been implemented yet.

As mentioned in #1, I do expect `juju charm-resources cs:postgresql` to work and query the charmstore.

[Simon Richardson (simonrichardson)]

PR https://github.com/juju/juju/pull/12682
Additionally, ongoing work is to address the juju charm-resources command https://github.com/juju/juju/pull/12683