tree 0b20a01eeeacc2ad93a55752103fe4a473b4f630
parent 240d26d25a464ee860f06494661a920110c2779e
author Jonathan Amsterdam <jba@google.com> 1607953561 -0500
committer Jonathan Amsterdam <jba@google.com> 1608114824 +0000

internal/proxy: support Disable-Module-Fetch header in fetch

Add Client.GetInfoNoFetch, which sets the Disable-Module-Fetch
header to avoid fetching a module from the proxy if it isn't in
the proxy's cache. This reduces load on the proxy.

We return the new error code NotFetched instead of NotFound in this
case, so we can distinguish modules where this happened in the DB.

Change-Id: I2134d09e09b115e2ed59ba1a479ef20c1ebe4a7e
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/277812
Trust: Jonathan Amsterdam <jba@google.com>
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Julie Qiu <julie@golang.org>