caddyhttp: add replacer placeholders for escaped values (#7181)

caddyconfig/httpcaddyfile/shorthands.go

@@ -64,10 +64,13 @@ func placeholderShorthands() []string {
 		"{orig_?query}", "{http.request.orig_uri.prefixed_query}",
 		"{method}", "{http.request.method}",
 		"{uri}", "{http.request.uri}",
+		"{%uri}", "{http.request.uri_escaped}",
 		"{path}", "{http.request.uri.path}",
+		"{%path}", "{http.request.uri.path_escaped}",
 		"{dir}", "{http.request.uri.path.dir}",
 		"{file}", "{http.request.uri.path.file}",
 		"{query}", "{http.request.uri.query}",
+		"{%query}", "{http.request.uri.query_escaped}",
 		"{?query}", "{http.request.uri.prefixed_query}",
 		"{remote}", "{http.request.remote}",
 		"{remote_host}", "{http.request.remote.host}",

modules/caddyhttp/replacer.go

@@ -172,8 +172,12 @@ func addHTTPVarsToReplacer(repl *caddy.Replacer, req *http.Request, w http.Respo
 			// current URI, including any internal rewrites
 			case "http.request.uri":
 				return req.URL.RequestURI(), true
+			case "http.request.uri_escaped":
+				return url.QueryEscape(req.URL.RequestURI()), true
 			case "http.request.uri.path":
 				return req.URL.Path, true
+			case "http.request.uri.path_escaped":
+				return url.QueryEscape(req.URL.Path), true
 			case "http.request.uri.path.file":
 				_, file := path.Split(req.URL.Path)
 				return file, true
@@ -186,6 +190,8 @@ func addHTTPVarsToReplacer(repl *caddy.Replacer, req *http.Request, w http.Respo
 				return path.Ext(req.URL.Path), true
 			case "http.request.uri.query":
 				return req.URL.RawQuery, true
+			case "http.request.uri.query_escaped":
+				return url.QueryEscape(req.URL.RawQuery), true
 			case "http.request.uri.prefixed_query":
 				if req.URL.RawQuery == "" {
 					return "", true

modules/caddyhttp/replacer_test.go

@@ -28,7 +28,7 @@ import (
 )
 
 func TestHTTPVarReplacement(t *testing.T) {
-	req, _ := http.NewRequest(http.MethodGet, "/foo/bar.tar.gz", nil)
+	req, _ := http.NewRequest(http.MethodGet, "/foo/bar.tar.gz?a=1&b=2", nil)
 	repl := caddy.NewReplacer()
 	localAddr, _ := net.ResolveTCPAddr("tcp", "192.168.159.1:80")
 	ctx := context.WithValue(req.Context(), caddy.ReplacerCtxKey, repl)
@@ -142,6 +142,22 @@ eqp31wM9il1n+guTNyxJd+FzVAH+hCZE5K+tCgVDdVFUlDEHHbS/wqb2PSIoouLV
 			get:    "http.request.host.labels.2",
 			expect: "",
 		},
+		{
+			get:    "http.request.uri",
+			expect: "/foo/bar.tar.gz?a=1&b=2",
+		},
+		{
+			get:    "http.request.uri_escaped",
+			expect: "%2Ffoo%2Fbar.tar.gz%3Fa%3D1%26b%3D2",
+		},
+		{
+			get:    "http.request.uri.path",
+			expect: "/foo/bar.tar.gz",
+		},
+		{
+			get:    "http.request.uri.path_escaped",
+			expect: "%2Ffoo%2Fbar.tar.gz",
+		},
 		{
 			get:    "http.request.uri.path.file",
 			expect: "bar.tar.gz",
@@ -155,6 +171,26 @@ eqp31wM9il1n+guTNyxJd+FzVAH+hCZE5K+tCgVDdVFUlDEHHbS/wqb2PSIoouLV
 			get:    "http.request.uri.path.file.ext",
 			expect: ".gz",
 		},
+		{
+			get:    "http.request.uri.query",
+			expect: "a=1&b=2",
+		},
+		{
+			get:    "http.request.uri.query_escaped",
+			expect: "a%3D1%26b%3D2",
+		},
+		{
+			get:    "http.request.uri.query.a",
+			expect: "1",
+		},
+		{
+			get:    "http.request.uri.query.b",
+			expect: "2",
+		},
+		{
+			get:    "http.request.uri.prefixed_query",
+			expect: "?a=1&b=2",
+		},
 		{
 			get:    "http.request.tls.cipher_suite",
 			expect: "TLS_AES_256_GCM_SHA384",