Preserve tailing backslash in URL paths (#7678)

Fixes #7649

pkg/net/url.go

@@ -21,6 +21,7 @@ import (
 	"errors"
 	"net/url"
 	"path"
+	"strings"
 )
 
 // URL - improved JSON friendly url.URL.
@@ -100,6 +101,11 @@ func ParseURL(s string) (u *URL, err error) {
 		uu.Path = path.Clean(uu.Path)
 	}
 
+	// path.Clean removes the trailing '/' and converts '//' to '/'.
+	if strings.HasSuffix(s, "/") && !strings.HasSuffix(uu.Path, "/") {
+		uu.Path += "/"
+	}
+
 	v := URL(*uu)
 	u = &v
 	return u, nil

pkg/net/url_test.go

@@ -107,8 +107,9 @@ func TestURLUnmarshalJSON(t *testing.T) {
 		{[]byte(`"https://play.min.io:0"`), &URL{Scheme: "https", Host: "play.min.io:0"}, false},
 		{[]byte(`"https://147.75.201.93:9000/"`), &URL{Scheme: "https", Host: "147.75.201.93:9000", Path: "/"}, false},
 		{[]byte(`"https://s3.amazonaws.com/?location"`), &URL{Scheme: "https", Host: "s3.amazonaws.com", Path: "/", RawQuery: "location"}, false},
-		{[]byte(`"http://myminio:10000/mybucket//myobject/"`), &URL{Scheme: "http", Host: "myminio:10000", Path: "/mybucket/myobject"}, false},
+		{[]byte(`"http://myminio:10000/mybucket/myobject//"`), &URL{Scheme: "http", Host: "myminio:10000", Path: "/mybucket/myobject/"}, false},
 		{[]byte(`"ftp://myftp.server:10000/myuser"`), &URL{Scheme: "ftp", Host: "myftp.server:10000", Path: "/myuser"}, false},
+		{[]byte(`"http://webhook.server:10000/mywebhook/"`), &URL{Scheme: "http", Host: "webhook.server:10000", Path: "/mywebhook/"}, false},
 		{[]byte(`"myserver:1000"`), nil, true},
 		{[]byte(`"http://:1000/mybucket"`), nil, true},
 		{[]byte(`"https://147.75.201.93:90000/"`), nil, true},
@@ -142,7 +143,7 @@ func TestParseURL(t *testing.T) {
 		{"https://play.min.io:0", &URL{Scheme: "https", Host: "play.min.io:0"}, false},
 		{"https://147.75.201.93:9000/", &URL{Scheme: "https", Host: "147.75.201.93:9000", Path: "/"}, false},
 		{"https://s3.amazonaws.com/?location", &URL{Scheme: "https", Host: "s3.amazonaws.com", Path: "/", RawQuery: "location"}, false},
-		{"http://myminio:10000/mybucket//myobject/", &URL{Scheme: "http", Host: "myminio:10000", Path: "/mybucket/myobject"}, false},
+		{"http://myminio:10000/mybucket//myobject/", &URL{Scheme: "http", Host: "myminio:10000", Path: "/mybucket/myobject/"}, false},
 		{"ftp://myftp.server:10000/myuser", &URL{Scheme: "ftp", Host: "myftp.server:10000", Path: "/myuser"}, false},
 		{"myserver:1000", nil, true},
 		{"http://:1000/mybucket", nil, true},