Prevent double decoding of % in url params (#17997) (#18001)

integrations/gitea-repositories-meta/user2/utf8.git/refs/heads/Plus+Is+Not+Space

@@ -1 +1 @@
-3a810dbf6b96afaa8c5f69a8b6ec1dabfca7368b
+59e2c41e8f5140bb0182acebec17c8ad9831cc62

integrations/nonascii_branches_test.go

@@ -6,6 +6,7 @@ package integrations
 
 import (
 	"net/http"
+	"net/url"
 	"path"
 	"testing"
 
@@ -83,7 +84,7 @@ func TestNonasciiBranches(t *testing.T) {
 		},
 		{
 			from:   "Plus+Is+Not+Space/Файл.md",
-			to:     "branch/Plus+Is+Not+Space/%d0%a4%d0%b0%d0%b9%d0%bb.md",
+			to:     "branch/Plus+Is+Not+Space/%D0%A4%D0%B0%D0%B9%D0%BB.md",
 			status: http.StatusOK,
 		},
 		{
@@ -114,7 +115,7 @@ func TestNonasciiBranches(t *testing.T) {
 		},
 		{
 			from:   "タグ/ファイル.md",
-			to:     "tag/%e3%82%bf%e3%82%b0/%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab.md",
+			to:     "tag/%e3%82%bf%e3%82%b0/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB.md",
 			status: http.StatusOK,
 		},
 		// Files
@@ -125,12 +126,12 @@ func TestNonasciiBranches(t *testing.T) {
 		},
 		{
 			from:   "Файл.md",
-			to:     "branch/Plus+Is+Not+Space/%d0%a4%d0%b0%d0%b9%d0%bb.md",
+			to:     "branch/Plus+Is+Not+Space/%D0%A4%D0%B0%D0%B9%D0%BB.md",
 			status: http.StatusOK,
 		},
 		{
 			from:   "ファイル.md",
-			to:     "branch/Plus+Is+Not+Space/%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab.md",
+			to:     "branch/Plus+Is+Not+Space/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB.md",
 			status: http.StatusNotFound, // it's not on default branch
 		},
 		// Same but url-encoded (few tests)
@@ -146,7 +147,7 @@ func TestNonasciiBranches(t *testing.T) {
 		},
 		{
 			from:   "%D0%A4%D0%B0%D0%B9%D0%BB.md",
-			to:     "branch/Plus+Is+Not+Space/%d0%a4%d0%b0%d0%b9%d0%bb.md",
+			to:     "branch/Plus+Is+Not+Space/%D0%A4%D0%B0%D0%B9%D0%BB.md",
 			status: http.StatusOK,
 		},
 		{
@@ -159,6 +160,41 @@ func TestNonasciiBranches(t *testing.T) {
 			to:     "tag/%d0%81/%e4%ba%ba",
 			status: http.StatusOK,
 		},
+		{
+			from:   "Plus+Is+Not+Space/%25%252525mightnotplaywell",
+			to:     "branch/Plus+Is+Not+Space/%25%252525mightnotplaywell",
+			status: http.StatusOK,
+		},
+		{
+			from:   "Plus+Is+Not+Space/%25253Fisnotaquestion%25253F",
+			to:     "branch/Plus+Is+Not+Space/%25253Fisnotaquestion%25253F",
+			status: http.StatusOK,
+		},
+		{
+			from:   "Plus+Is+Not+Space/" + url.PathEscape("%3Fis?and#afile"),
+			to:     "branch/Plus+Is+Not+Space/" + url.PathEscape("%3Fis?and#afile"),
+			status: http.StatusOK,
+		},
+		{
+			from:   "Plus+Is+Not+Space/10%25.md",
+			to:     "branch/Plus+Is+Not+Space/10%25.md",
+			status: http.StatusOK,
+		},
+		{
+			from:   "Plus+Is+Not+Space/" + url.PathEscape("This+file%20has 1space"),
+			to:     "branch/Plus+Is+Not+Space/" + url.PathEscape("This+file%20has 1space"),
+			status: http.StatusOK,
+		},
+		{
+			from:   "Plus+Is+Not+Space/" + url.PathEscape("This+file%2520has 2 spaces"),
+			to:     "branch/Plus+Is+Not+Space/" + url.PathEscape("This+file%2520has 2 spaces"),
+			status: http.StatusOK,
+		},
+		{
+			from:   "Plus+Is+Not+Space/" + url.PathEscape("£15&$6.txt"),
+			to:     "branch/Plus+Is+Not+Space/" + url.PathEscape("£15&$6.txt"),
+			status: http.StatusOK,
+		},
 	}
 
 	defer prepareTestEnv(t)()