fix: error handling and vendor

vendor/github.com/go-openapi/jsonreference/internal/normalize_url.go

@@ -0,0 +1,69 @@
+package internal
+
+import (
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+const (
+	defaultHTTPPort  = ":80"
+	defaultHTTPSPort = ":443"
+)
+
+// Regular expressions used by the normalizations
+var rxPort = regexp.MustCompile(`(:\d+)/?$`)
+var rxDupSlashes = regexp.MustCompile(`/{2,}`)
+
+// NormalizeURL will normalize the specified URL
+// This was added to replace a previous call to the no longer maintained purell library:
+// The call that was used looked like the following:
+//
+//	url.Parse(purell.NormalizeURL(parsed, purell.FlagsSafe|purell.FlagRemoveDuplicateSlashes))
+//
+// To explain all that was included in the call above, purell.FlagsSafe was really just the following:
+//   - FlagLowercaseScheme
+//   - FlagLowercaseHost
+//   - FlagRemoveDefaultPort
+//   - FlagRemoveDuplicateSlashes (and this was mixed in with the |)
+//
+// This also normalizes the URL into its urlencoded form by removing RawPath and RawFragment.
+func NormalizeURL(u *url.URL) {
+	lowercaseScheme(u)
+	lowercaseHost(u)
+	removeDefaultPort(u)
+	removeDuplicateSlashes(u)
+
+	u.RawPath = ""
+	u.RawFragment = ""
+}
+
+func lowercaseScheme(u *url.URL) {
+	if len(u.Scheme) > 0 {
+		u.Scheme = strings.ToLower(u.Scheme)
+	}
+}
+
+func lowercaseHost(u *url.URL) {
+	if len(u.Host) > 0 {
+		u.Host = strings.ToLower(u.Host)
+	}
+}
+
+func removeDefaultPort(u *url.URL) {
+	if len(u.Host) > 0 {
+		scheme := strings.ToLower(u.Scheme)
+		u.Host = rxPort.ReplaceAllStringFunc(u.Host, func(val string) string {
+			if (scheme == "http" && val == defaultHTTPPort) || (scheme == "https" && val == defaultHTTPSPort) {
+				return ""
+			}
+			return val
+		})
+	}
+}
+
+func removeDuplicateSlashes(u *url.URL) {
+	if len(u.Path) > 0 {
+		u.Path = rxDupSlashes.ReplaceAllString(u.Path, "/")
+	}
+}