diff options
Diffstat (limited to 'modules/caddyhttp/reverseproxy/addresses.go')
| -rw-r--r-- | modules/caddyhttp/reverseproxy/addresses.go | 67 |
1 files changed, 43 insertions, 24 deletions
diff --git a/modules/caddyhttp/reverseproxy/addresses.go b/modules/caddyhttp/reverseproxy/addresses.go index 6078f11..0939497 100644 --- a/modules/caddyhttp/reverseproxy/addresses.go +++ b/modules/caddyhttp/reverseproxy/addresses.go @@ -23,11 +23,43 @@ import ( "github.com/caddyserver/caddy/v2" ) +type parsedAddr struct { + network, scheme, host, port string + valid bool +} + +func (p parsedAddr) dialAddr() string { + if !p.valid { + return "" + } + // for simplest possible config, we only need to include + // the network portion if the user specified one + if p.network != "" { + return caddy.JoinNetworkAddress(p.network, p.host, p.port) + } + + // if the host is a placeholder, then we don't want to join with an empty port, + // because that would just append an extra ':' at the end of the address. + if p.port == "" && strings.Contains(p.host, "{") { + return p.host + } + return net.JoinHostPort(p.host, p.port) +} +func (p parsedAddr) rangedPort() bool { + return strings.Contains(p.port, "-") +} +func (p parsedAddr) replaceablePort() bool { + return strings.Contains(p.port, "{") && strings.Contains(p.port, "}") +} +func (p parsedAddr) isUnix() bool { + return caddy.IsUnixNetwork(p.network) +} + // parseUpstreamDialAddress parses configuration inputs for // the dial address, including support for a scheme in front // as a shortcut for the port number, and a network type, // for example 'unix' to dial a unix socket. -func parseUpstreamDialAddress(upstreamAddr string) (string, string, error) { +func parseUpstreamDialAddress(upstreamAddr string) (parsedAddr, error) { var network, scheme, host, port string if strings.Contains(upstreamAddr, "://") { @@ -35,7 +67,7 @@ func parseUpstreamDialAddress(upstreamAddr string) (string, string, error) { // so we return a more user-friendly error message instead // to explain what to do instead if strings.Contains(upstreamAddr, "{") { - return "", "", fmt.Errorf("due to parsing difficulties, placeholders are not allowed when an upstream address contains a scheme") + return parsedAddr{}, fmt.Errorf("due to parsing difficulties, placeholders are not allowed when an upstream address contains a scheme") } toURL, err := url.Parse(upstreamAddr) @@ -46,19 +78,19 @@ func parseUpstreamDialAddress(upstreamAddr string) (string, string, error) { if strings.Contains(err.Error(), "invalid port") && strings.Contains(err.Error(), "-") { index := strings.LastIndex(upstreamAddr, ":") if index == -1 { - return "", "", fmt.Errorf("parsing upstream URL: %v", err) + return parsedAddr{}, fmt.Errorf("parsing upstream URL: %v", err) } portRange := upstreamAddr[index+1:] if strings.Count(portRange, "-") != 1 { - return "", "", fmt.Errorf("parsing upstream URL: parse \"%v\": port range invalid: %v", upstreamAddr, portRange) + return parsedAddr{}, fmt.Errorf("parsing upstream URL: parse \"%v\": port range invalid: %v", upstreamAddr, portRange) } toURL, err = url.Parse(strings.ReplaceAll(upstreamAddr, portRange, "0")) if err != nil { - return "", "", fmt.Errorf("parsing upstream URL: %v", err) + return parsedAddr{}, fmt.Errorf("parsing upstream URL: %v", err) } port = portRange } else { - return "", "", fmt.Errorf("parsing upstream URL: %v", err) + return parsedAddr{}, fmt.Errorf("parsing upstream URL: %v", err) } } if port == "" { @@ -69,18 +101,18 @@ func parseUpstreamDialAddress(upstreamAddr string) (string, string, error) { // a backend and proxying to it, so we cannot allow extra components // in backend URLs if toURL.Path != "" || toURL.RawQuery != "" || toURL.Fragment != "" { - return "", "", fmt.Errorf("for now, URLs for proxy upstreams only support scheme, host, and port components") + return parsedAddr{}, fmt.Errorf("for now, URLs for proxy upstreams only support scheme, host, and port components") } // ensure the port and scheme aren't in conflict if toURL.Scheme == "http" && port == "443" { - return "", "", fmt.Errorf("upstream address has conflicting scheme (http://) and port (:443, the HTTPS port)") + return parsedAddr{}, fmt.Errorf("upstream address has conflicting scheme (http://) and port (:443, the HTTPS port)") } if toURL.Scheme == "https" && port == "80" { - return "", "", fmt.Errorf("upstream address has conflicting scheme (https://) and port (:80, the HTTP port)") + return parsedAddr{}, fmt.Errorf("upstream address has conflicting scheme (https://) and port (:80, the HTTP port)") } if toURL.Scheme == "h2c" && port == "443" { - return "", "", fmt.Errorf("upstream address has conflicting scheme (h2c://) and port (:443, the HTTPS port)") + return parsedAddr{}, fmt.Errorf("upstream address has conflicting scheme (h2c://) and port (:443, the HTTPS port)") } // if port is missing, attempt to infer from scheme @@ -112,18 +144,5 @@ func parseUpstreamDialAddress(upstreamAddr string) (string, string, error) { network = "unix" scheme = "h2c" } - - // for simplest possible config, we only need to include - // the network portion if the user specified one - if network != "" { - return caddy.JoinNetworkAddress(network, host, port), scheme, nil - } - - // if the host is a placeholder, then we don't want to join with an empty port, - // because that would just append an extra ':' at the end of the address. - if port == "" && strings.Contains(host, "{") { - return host, scheme, nil - } - - return net.JoinHostPort(host, port), scheme, nil + return parsedAddr{network, scheme, host, port, true}, nil } |