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net/dns/resolver: set DNS-over-HTTPS Accept and User-Agent header on requests

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Change-Id: I14b821771681e70405a507f43229c694159265ff
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2022-09-10 08:43:18 -07:00 committed by Brad Fitzpatrick
parent ed2b8b3e1d
commit e7376aca25
1 changed files with 3 additions and 5 deletions
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8
net/dns/resolver/forwarder.go
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@ -37,6 +37,7 @@
"tailscale.com/types/nettype"
"tailscale.com/util/cloudenv"
"tailscale.com/util/dnsname"
"tailscale.com/version"
"tailscale.com/wgengine/monitor"
)
@ -459,11 +460,8 @@ func (f *forwarder) sendDoH(ctx context.Context, urlBase string, c *http.Client,
return nil, err
}
req.Header.Set("Content-Type", dohType)
// Note: we don't currently set the Accept header (which is
// only a SHOULD in the spec) as iOS doesn't use HTTP/2 and
// we'd rather save a few bytes on outgoing requests when
// empirically no provider cares about the Accept header's
// absence.
req.Header.Set("Accept", dohType)
req.Header.Set("User-Agent", "tailscaled/"+version.Long)
hres, err := c.Do(req)
if err != nil {