more work on websocket support

irc/utils/glob.go

@@ -0,0 +1,30 @@
+// Copyright (c) 2020 Shivaram Lingamneni <slingamn@cs.stanford.edu>
+// released under the MIT license
+
+package utils
+
+import (
+	"bytes"
+	"regexp"
+	"strings"
+)
+
+// yet another glob implementation in Go
+
+func CompileGlob(glob string) (result *regexp.Regexp, err error) {
+	var buf bytes.Buffer
+	buf.WriteByte('^')
+	for {
+		i := strings.IndexByte(glob, '*')
+		if i == -1 {
+			buf.WriteString(regexp.QuoteMeta(glob))
+			break
+		} else {
+			buf.WriteString(regexp.QuoteMeta(glob[:i]))
+			buf.WriteString(".*")
+			glob = glob[i+1:]
+		}
+	}
+	buf.WriteByte('$')
+	return regexp.Compile(buf.String())
+}