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reverseproxy: Improve error message when using scheme+placeholder (#3393)

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* reverseproxy: Improve error message when using scheme+placeholder

* reverseproxy: Simplify error message

Co-authored-by: Matt Holt <mholt@users.noreply.github.com>

Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
This commit is contained in:
Francis Lavoie 2020-05-26 16:13:15 -04:00 committed by GitHub
parent ffc125d6f5
commit c1e5c09294
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1 changed files with 7 additions and 0 deletions
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7
modules/caddyhttp/reverseproxy/caddyfile.go
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@ -103,6 +103,13 @@ func (h *Handler) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
var network, scheme, host, port string
if strings.Contains(upstreamAddr, "://") {
// we get a parsing error if a placeholder is specified
// so we return a more user-friendly error message instead
// to explain what to do instead
if strings.Contains(upstreamAddr, "{") {
return "", d.Err("due to parsing difficulties, placeholders are not allowed when an upstream address contains a scheme")
}
toURL, err := url.Parse(upstreamAddr)
if err != nil {
return "", d.Errf("parsing upstream URL: %v", err)