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reverseproxy: Enforce port range size of 1 at provision (#3695)

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* reverse_proxy: ensure upstream address has port range of only 1

* reverse_proxy: don't log the error if upstream range size is more than 1
This commit is contained in:
Mohammed Al Sahaf 2020-09-17 04:48:37 +03:00 committed by GitHub
parent b95b87381a
commit d55d50b3b3
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1 changed files with 7 additions and 0 deletions
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7
modules/caddyhttp/reverseproxy/reverseproxy.go
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@ -204,6 +204,13 @@ func (h *Handler) Provision(ctx caddy.Context) error {
// set up upstreams
for _, upstream := range h.Upstreams {
addr, err := caddy.ParseNetworkAddress(upstream.Dial)
if err != nil {
return err
}
if addr.PortRangeSize() != 1 {
return fmt.Errorf("multiple addresses (upstream must map to only one address): %v", addr)
}
// create or get the host representation for this upstream
var host Host = new(upstreamHost)
existingHost, loaded := hosts.LoadOrStore(upstream.String(), host)