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reverse_proxy, php_fastcgi: Fix upstream parsing regression (fix #3101)
This commit is contained in:
Matthew Holt
parent
e4ec08e977
commit
c83d40ccd4
1 changed files with 61 additions and 50 deletions
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@ -101,69 +101,80 @@ func (h *Handler) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
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// TODO: the logic in this function is kind of sensitive, we need
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// to write tests before making any more changes to it
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upstreamDialAddress := func(upstreamAddr string) (string, error) {
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// slight hack, to ensure a non-URL parses correctly (simplifies our code paths)
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const undefinedScheme = "undefined"
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if !strings.Contains(upstreamAddr, "://") {
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upstreamAddr = undefinedScheme + "://" + upstreamAddr
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}
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var network, scheme, host, port string
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// convenient way to get desired scheme, host, and port
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toURL, err := url.Parse(upstreamAddr)
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if err != nil {
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return "", d.Errf("parsing upstream address: %v", err)
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}
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if toURL.Scheme == undefinedScheme {
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toURL.Scheme = ""
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}
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// there is currently no way to perform a URL rewrite between choosing
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// a backend and proxying to it, so we cannot allow extra components
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// in backend URLs
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if toURL.Path != "" || toURL.RawQuery != "" || toURL.Fragment != "" {
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return "", d.Err("for now, URLs for proxy upstreams only support scheme, host, and port components")
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}
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// ensure the port and scheme aren't in conflict
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urlPort := toURL.Port()
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if toURL.Scheme == "http" && urlPort == "443" {
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return "", d.Err("upstream address has conflicting scheme (http://) and port (:443, the HTTPS port)")
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}
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if toURL.Scheme == "https" && urlPort == "80" {
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return "", d.Err("upstream address has conflicting scheme (https://) and port (:80, the HTTP port)")
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}
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// dial addresses always need a port, so if no port was
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// specified, assume the default ports for HTTP(S)
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if urlPort == "" {
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var toPort string
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if toURL.Scheme == "" {
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// if no port or scheme is specified, we assume HTTP
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toPort = "80"
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} else if toURL.Scheme == "https" {
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toPort = "443"
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if strings.Contains(upstreamAddr, "://") {
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toURL, err := url.Parse(upstreamAddr)
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if err != nil {
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return "", d.Errf("parsing upstream URL: %v", err)
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}
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// there is currently no way to perform a URL rewrite between choosing
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// a backend and proxying to it, so we cannot allow extra components
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// in backend URLs
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if toURL.Path != "" || toURL.RawQuery != "" || toURL.Fragment != "" {
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return "", d.Err("for now, URLs for proxy upstreams only support scheme, host, and port components")
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}
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// ensure the port and scheme aren't in conflict
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urlPort := toURL.Port()
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if toURL.Scheme == "http" && urlPort == "443" {
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return "", d.Err("upstream address has conflicting scheme (http://) and port (:443, the HTTPS port)")
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}
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if toURL.Scheme == "https" && urlPort == "80" {
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return "", d.Err("upstream address has conflicting scheme (https://) and port (:80, the HTTP port)")
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}
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// if port is missing, attempt to infer from scheme
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if toURL.Port() == "" {
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var toPort string
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switch toURL.Scheme {
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case "", "http":
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toPort = "80"
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case "https":
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toPort = "443"
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}
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toURL.Host = net.JoinHostPort(toURL.Hostname(), toPort)
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}
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scheme, host, port = toURL.Scheme, toURL.Hostname(), toURL.Port()
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} else {
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// extract network manually, since caddy.ParseNetworkAddress() will always add one
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if idx := strings.Index(upstreamAddr, "/"); idx >= 0 {
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network = strings.ToLower(strings.TrimSpace(upstreamAddr[:idx]))
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upstreamAddr = upstreamAddr[idx+1:]
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}
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var err error
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host, port, err = net.SplitHostPort(upstreamAddr)
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if err != nil {
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host = upstreamAddr
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}
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toURL.Host = net.JoinHostPort(toURL.Host, toPort)
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}
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// if port is known and scheme is not, set the scheme
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if toURL.Scheme == "" {
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if urlPort == "80" {
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toURL.Scheme = "http"
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} else if urlPort == "443" {
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toURL.Scheme = "https"
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// if scheme is not set, we may be able to infer it from a known port
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if scheme == "" {
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if port == "80" {
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scheme = "http"
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} else if port == "443" {
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scheme = "https"
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}
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}
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// the underlying JSON does not yet support different
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// transports (protocols or schemes) to each backend,
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// so we remember the last one we see and compare them
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if commonScheme != "" && toURL.Scheme != commonScheme {
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if commonScheme != "" && scheme != commonScheme {
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return "", d.Errf("for now, all proxy upstreams must use the same scheme (transport protocol); expecting '%s://' but got '%s://'",
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commonScheme, toURL.Scheme)
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commonScheme, scheme)
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}
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commonScheme = toURL.Scheme
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commonScheme = scheme
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return toURL.Host, nil
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// for simplest possible config, we only need to include
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// the network portion if the user specified one
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if network != "" {
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return caddy.JoinNetworkAddress(network, host, port), nil
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}
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return net.JoinHostPort(host, port), nil
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}
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for d.Next() {
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