snapshot of https://github.com/mattermost/mattermost.git (master, 2026-09-16; blobs > 131072B omitted)

server/public/shared/mlog/default.go

@@ -0,0 +1,63 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package mlog
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+// defaultLog manually encodes the log to STDERR, providing a basic, default logging implementation
+// before mlog is fully configured.
+func defaultLog(level Level, msg string, fields ...Field) {
+	mFields := make(map[string]string)
+	buf := &bytes.Buffer{}
+
+	for _, fld := range fields {
+		buf.Reset()
+		fld.ValueString(buf, shouldQuote)
+		mFields[fld.Key] = buf.String()
+	}
+
+	log := struct {
+		Level   string            `json:"level"`
+		Message string            `json:"msg"`
+		Fields  map[string]string `json:"fields,omitempty"`
+	}{
+		level.Name,
+		msg,
+		mFields,
+	}
+
+	if b, err := json.Marshal(log); err != nil {
+		fmt.Fprintf(os.Stderr, `{"level":"error","msg":"failed to encode log message"}%s`, "\n")
+	} else {
+		fmt.Fprintf(os.Stderr, "%s\n", b)
+	}
+}
+
+func defaultIsLevelEnabled(level Level) bool {
+	return true
+}
+
+func defaultCustomMultiLog(lvl []Level, msg string, fields ...Field) {
+	for _, level := range lvl {
+		defaultLog(level, msg, fields...)
+	}
+}
+
+// shouldQuote returns true if val contains any characters that require quotations.
+func shouldQuote(val string) bool {
+	for _, c := range val {
+		if !((c >= '0' && c <= '9') ||
+			(c >= 'a' && c <= 'z') ||
+			(c >= 'A' && c <= 'Z') ||
+			c == '-' || c == '.' || c == '_' || c == '/' || c == '@' || c == '^' || c == '+') {
+			return true
+		}
+	}
+	return false
+}