Merge pull request #1615 from ysqi/routerErrorFix

Fixed #1586

tree.go

@@ -442,7 +442,9 @@ func (leaf *leafInfo) match(wildcardValues []string, ctx *context.Context) (ok b
 	}
 	matches := leaf.regexps.FindStringSubmatch(path.Join(wildcardValues...))
 	for i, match := range matches[1:] {
-		ctx.Input.SetParam(leaf.wildcards[i], match)
+		if i < len(leaf.wildcards) {
+			ctx.Input.SetParam(leaf.wildcards[i], match)
+		}
 	}
 	return true
 }
@@ -540,13 +542,19 @@ func splitSegment(key string) (bool, []string, string) {
 					continue
 				}
 			}
-			if v == ':' {
+			// Escape Sequence '\'
+			if i > 0 && key[i-1] == '\\' {
+				out = append(out, v)
+			} else if v == ':' {
 				param = make([]rune, 0)
 				start = true
 			} else if v == '(' {
 				startexp = true
 				start = false
-				params = append(params, ":"+string(param))
+				if len(param) > 0 {
+					params = append(params, ":"+string(param))
+					param = make([]rune, 0)
+				}
 				paramsNum++
 				expt = make([]rune, 0)
 				expt = append(expt, '(')