131 lines
3.4 KiB
Go
131 lines
3.4 KiB
Go
package logging
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import (
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"fmt"
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"log"
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"net/http"
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"time"
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"github.com/go-chi/chi/middleware"
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"github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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)
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var (
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// Logger is a configured logrus.Logger.
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Logger *logrus.Logger
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)
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// StructuredLogger is a structured logrus Logger.
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type StructuredLogger struct {
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Logger *logrus.Logger
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}
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// NewLogger creates and configures a new logrus Logger.
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func NewLogger() *logrus.Logger {
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Logger = logrus.New()
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if viper.GetBool("log_textlogging") {
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Logger.Formatter = &logrus.TextFormatter{
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DisableTimestamp: true,
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}
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} else {
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Logger.Formatter = &logrus.JSONFormatter{
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DisableTimestamp: true,
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}
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}
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level := viper.GetString("log_level")
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if level == "" {
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level = "error"
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}
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l, err := logrus.ParseLevel(level)
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if err != nil {
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log.Fatal(err)
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}
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Logger.Level = l
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return Logger
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}
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// NewStructuredLogger implements a custom structured logrus Logger.
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func NewStructuredLogger(logger *logrus.Logger) func(next http.Handler) http.Handler {
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return middleware.RequestLogger(&StructuredLogger{Logger})
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}
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// NewLogEntry sets default request log fields.
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func (l *StructuredLogger) NewLogEntry(r *http.Request) middleware.LogEntry {
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entry := &StructuredLoggerEntry{Logger: logrus.NewEntry(l.Logger)}
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logFields := logrus.Fields{}
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logFields["ts"] = time.Now().UTC().Format(time.RFC1123)
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if reqID := middleware.GetReqID(r.Context()); reqID != "" {
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logFields["req_id"] = reqID
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}
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scheme := "http"
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if r.TLS != nil {
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scheme = "https"
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}
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logFields["http_scheme"] = scheme
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logFields["http_proto"] = r.Proto
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logFields["http_method"] = r.Method
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logFields["remote_addr"] = r.RemoteAddr
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logFields["user_agent"] = r.UserAgent()
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logFields["uri"] = fmt.Sprintf("%s://%s%s", scheme, r.Host, r.RequestURI)
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logFields["uri"] = fmt.Sprintf("%s", r.RequestURI)
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entry.Logger = entry.Logger.WithFields(logFields)
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entry.Logger.Infoln("request started")
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return entry
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}
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// StructuredLoggerEntry is a logrus.FieldLogger.
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type StructuredLoggerEntry struct {
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Logger logrus.FieldLogger
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}
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func (l *StructuredLoggerEntry) Write(status, bytes int, elapsed time.Duration) {
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l.Logger = l.Logger.WithFields(logrus.Fields{
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"resp_status": status,
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"resp_bytes_length": bytes,
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"resp_elasped_ms": float64(elapsed.Nanoseconds()) / 1000000.0,
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})
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l.Logger.Infoln("request complete")
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}
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// Panic prints stack trace
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func (l *StructuredLoggerEntry) Panic(v interface{}, stack []byte) {
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l.Logger = l.Logger.WithFields(logrus.Fields{
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"stack": string(stack),
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"panic": fmt.Sprintf("%+v", v),
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})
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}
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// Helper methods used by the application to get the request-scoped
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// logger entry and set additional fields between handlers.
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// GetLogEntry return the request scoped logrus.FieldLogger.
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func GetLogEntry(r *http.Request) logrus.FieldLogger {
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entry := middleware.GetLogEntry(r).(*StructuredLoggerEntry)
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return entry.Logger
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}
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// LogEntrySetField adds a field to the request scoped logrus.FieldLogger.
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func LogEntrySetField(r *http.Request, key string, value interface{}) {
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if entry, ok := r.Context().Value(middleware.LogEntryCtxKey).(*StructuredLoggerEntry); ok {
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entry.Logger = entry.Logger.WithField(key, value)
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}
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}
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// LogEntrySetFields adds multiple fields to the request scoped logrus.FieldLogger.
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func LogEntrySetFields(r *http.Request, fields map[string]interface{}) {
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if entry, ok := r.Context().Value(middleware.LogEntryCtxKey).(*StructuredLoggerEntry); ok {
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entry.Logger = entry.Logger.WithFields(fields)
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}
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}
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