add url package

url/url.go

@@ -0,0 +1,31 @@
+package url
+
+type URL struct {
+	Scheme string
+	Host   string
+	Path   string
+}
+
+func Parse(rawURL string) (*URL, error) {
+	schemeIndex := -1
+	hostStartIndex := -1
+	hostEndIndex := -1
+	for i := 0; i < len(rawURL); i++ {
+		if schemeIndex == -1 && rawURL[i] == ':' {
+			schemeIndex = i
+			hostStartIndex = i + 3
+			i += 3
+			continue
+		}
+		if rawURL[i] == '/' {
+			hostEndIndex = i
+			break
+		}
+	}
+
+	return &URL{
+		Scheme: rawURL[:schemeIndex],
+		Host:   rawURL[hostStartIndex:hostEndIndex],
+		Path:   rawURL[hostEndIndex:],
+	}, nil
+}