go1.16 (#14783)

vendor/github.com/go-openapi/swag/loading.go

@@ -19,7 +19,9 @@ import (
 	"io/ioutil"
 	"log"
 	"net/http"
+	"net/url"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"time"
 )
@@ -53,10 +55,30 @@ func LoadStrategy(path string, local, remote func(string) ([]byte, error)) func(
 		return remote
 	}
 	return func(pth string) ([]byte, error) {
-		upth, err := pathUnescape(strings.TrimPrefix(pth, `file://`))
+		upth, err := pathUnescape(pth)
 		if err != nil {
 			return nil, err
 		}
+
+		if strings.HasPrefix(pth, `file://`) {
+			if runtime.GOOS == "windows" {
+				// support for canonical file URIs on windows.
+				// Zero tolerance here for dodgy URIs.
+				u, _ := url.Parse(upth)
+				if u.Host != "" {
+					// assume UNC name (volume share)
+					// file://host/share/folder\... ==> \\host\share\path\folder
+					// NOTE: UNC port not yet supported
+					upth = strings.Join([]string{`\`, u.Host, u.Path}, `\`)
+				} else {
+					// file:///c:/folder/... ==> just remove the leading slash
+					upth = strings.TrimPrefix(upth, `file:///`)
+				}
+			} else {
+				upth = strings.TrimPrefix(upth, `file://`)
+			}
+		}
+
 		return local(filepath.FromSlash(upth))
 	}
 }