Logging improvements (#195)

- Fix (and test) filtering of lines
- Filter out shadowsocks cannot resolve error
- Change tinyproxy color
- Deduct logging level according to message content

internal/logging/line_test.go

@@ -0,0 +1,93 @@
+package logging
+
+import (
+	"testing"
+
+	"github.com/qdm12/golibs/logging"
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_PostProcessLine(t *testing.T) {
+	t.Parallel()
+	tests := map[string]struct {
+		s        string
+		filtered string
+		level    logging.Level
+	}{
+		"empty string":  {"", "", logging.InfoLevel},
+		"random string": {"asdasqdb", "asdasqdb", logging.InfoLevel},
+		"unbound notice": {
+			"unbound: [1594595249] unbound[75:0] notice: init module 0: validator",
+			"unbound: init module 0: validator",
+			logging.InfoLevel},
+		"unbound info": {
+			"unbound: [1594595249] unbound[75:0] info: init module 0: validator",
+			"unbound: init module 0: validator",
+			logging.InfoLevel},
+		"unbound warn": {
+			"unbound: [1594595249] unbound[75:0] warn: init module 0: validator",
+			"unbound: init module 0: validator",
+			logging.WarnLevel},
+		"unbound error": {
+			"unbound: [1594595249] unbound[75:0] error: init module 0: validator",
+			"unbound: init module 0: validator",
+			logging.ErrorLevel},
+		"unbound unknown": {
+			"unbound: [1594595249] unbound[75:0] BLA: init module 0: validator",
+			"unbound: BLA: init module 0: validator",
+			logging.ErrorLevel},
+		"shadowsocks stdout info": {
+			"shadowsocks:  2020-07-12 23:07:25 INFO: UDP relay enabled",
+			"shadowsocks: UDP relay enabled",
+			logging.InfoLevel},
+		"shadowsocks stdout other": {
+			"shadowsocks:  2020-07-12 23:07:25 BLABLA: UDP relay enabled",
+			"shadowsocks: BLABLA: UDP relay enabled",
+			logging.WarnLevel},
+		"shadowsocks stderr": {
+			"shadowsocks error:  2020-07-12 23:07:25 Some error",
+			"shadowsocks: Some error",
+			logging.ErrorLevel},
+		"shadowsocks stderr unable to resolve muted": {
+			"shadowsocks error:  2020-07-12 23:07:25 ERROR: unable to resolve",
+			"",
+			logging.ErrorLevel},
+		"tinyproxy info": {
+			"tinyproxy: INFO      Jul 12 23:07:25 [32]: Reloading config file",
+			"tinyproxy: Reloading config file",
+			logging.InfoLevel},
+		"tinyproxy connect": {
+			"tinyproxy: CONNECT      Jul 12 23:07:25 [32]: Reloading config file",
+			"tinyproxy: Reloading config file",
+			logging.InfoLevel},
+		"tinyproxy notice": {
+			"tinyproxy: NOTICE      Jul 12 23:07:25 [32]: Reloading config file",
+			"tinyproxy: Reloading config file",
+			logging.InfoLevel},
+		"tinyproxy warning": {
+			"tinyproxy: WARNING      Jul 12 23:07:25 [32]: Reloading config file",
+			"tinyproxy: Reloading config file",
+			logging.WarnLevel},
+		"tinyproxy error": {
+			"tinyproxy: ERROR      Jul 12 23:07:25 [32]: Reloading config file",
+			"tinyproxy: Reloading config file",
+			logging.ErrorLevel},
+		"tinyproxy critical": {
+			"tinyproxy: CRITICAL      Jul 12 23:07:25 [32]: Reloading config file",
+			"tinyproxy: Reloading config file",
+			logging.ErrorLevel},
+		"tinyproxy unknown": {
+			"tinyproxy: BLABLA      Jul 12 23:07:25 [32]: Reloading config file",
+			"tinyproxy: Reloading config file",
+			logging.ErrorLevel},
+	}
+	for name, tc := range tests {
+		tc := tc
+		t.Run(name, func(t *testing.T) {
+			t.Parallel()
+			filtered, level := PostProcessLine(tc.s)
+			assert.Equal(t, tc.filtered, filtered)
+			assert.Equal(t, tc.level, level)
+		})
+	}
+}