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reverseproxy: Add placeholder for host in active health check headers #6440

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Jul 6, 2024
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reverseproxy: Add placeholder for host in active health check headers #6440

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1 change: 1 addition & 0 deletions modules/caddyhttp/reverseproxy/healthchecks.go
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Original file line number Diff line number Diff line change
Expand Up @@ -386,6 +386,7 @@ func (h *Handler) doActiveHealthCheck(dialInfo DialInfo, hostAddr string, upstre

// set headers, using a replacer with only globals (env vars, system info, etc.)
repl := caddy.NewReplacer()
repl.Set("http.reverse_proxy.active.target_host", hostAddr)
for key, vals := range h.HealthChecks.Active.Headers {
key = repl.ReplaceAll(key, "")
if key == "Host" {
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