Samuel Berthe
93 lines
2.2 KiB
Go
93 lines
2.2 KiB
Go
package sloggin
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import (
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"context"
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"net/http"
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"time"
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"log/slog"
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"github.com/gin-gonic/gin"
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"github.com/google/uuid"
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)
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const requestIDCtx = "slog-gin.request-id"
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type Config struct {
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DefaultLevel slog.Level
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ClientErrorLevel slog.Level
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ServerErrorLevel slog.Level
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WithRequestID bool
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}
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// New returns a gin.HandlerFunc (middleware) that logs requests using slog.
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//
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// Requests with errors are logged using slog.Error().
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// Requests without errors are logged using slog.Info().
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func New(logger *slog.Logger) gin.HandlerFunc {
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return NewWithConfig(logger, Config{
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DefaultLevel: slog.LevelInfo,
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ClientErrorLevel: slog.LevelWarn,
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ServerErrorLevel: slog.LevelError,
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WithRequestID: true,
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})
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}
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// NewWithConfig returns a gin.HandlerFunc (middleware) that logs requests using slog.
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func NewWithConfig(logger *slog.Logger, config Config) gin.HandlerFunc {
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return func(c *gin.Context) {
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start := time.Now()
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path := c.Request.URL.Path
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requestID := uuid.New().String()
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if config.WithRequestID {
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c.Set(requestIDCtx, requestID)
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c.Header("X-Request-ID", requestID)
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}
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c.Next()
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end := time.Now()
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latency := end.Sub(start)
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attributes := []slog.Attr{
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slog.Int("status", c.Writer.Status()),
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slog.String("method", c.Request.Method),
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slog.String("path", path),
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slog.String("ip", c.ClientIP()),
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slog.Duration("latency", latency),
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slog.String("user-agent", c.Request.UserAgent()),
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slog.Time("time", end),
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}
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if config.WithRequestID {
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attributes = append(attributes, slog.String("request-id", requestID))
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}
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switch {
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case c.Writer.Status() >= http.StatusBadRequest && c.Writer.Status() < http.StatusInternalServerError:
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logger.LogAttrs(context.Background(), config.ClientErrorLevel, c.Errors.String(), attributes...)
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case c.Writer.Status() >= http.StatusInternalServerError:
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logger.LogAttrs(context.Background(), config.ServerErrorLevel, c.Errors.String(), attributes...)
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default:
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logger.LogAttrs(context.Background(), config.DefaultLevel, "Incoming request", attributes...)
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}
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}
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}
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// GetRequestID returns the request identifier
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func GetRequestID(c *gin.Context) string {
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requestID, ok := c.Get(requestIDCtx)
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if !ok {
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return ""
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}
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if id, ok := requestID.(string); ok {
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return id
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}
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return ""
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}
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