/
context.go
51 lines (43 loc) · 1.09 KB
/
context.go
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package ctxzap
import (
"context"
"github.com/gin-gonic/gin"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"github.com/screwyprof/golibs/gin/middleware/ctxtags"
)
type ctxLogger struct {
logger *zap.Logger
fields []zapcore.Field
}
var (
ctxKey = "ctxzap"
nopLogger = zap.NewNop()
)
// FromContext creates the call-scoped Logger with ctxtags values set as fields.
func FromContext(ctx context.Context) *zap.Logger {
l, ok := ctx.Value(ctxKey).(*ctxLogger)
if !ok || l.logger == nil {
return nopLogger
}
fields := tagsToFields(ctx)
fields = append(fields, l.fields...)
return l.logger.With(fields...)
}
// tagsToFields transforms the Tags on the supplied context into zap fields.
func tagsToFields(ctx context.Context) []zapcore.Field {
var fields []zapcore.Field
tags := ctxtags.FromContext(ctx)
for k, v := range tags.Values() {
fields = append(fields, zap.Any(k, v))
}
return fields
}
// ToContext adds zap.Logger to the context for later extraction.
func ToContext(c *gin.Context, logger *zap.Logger) *gin.Context {
l := &ctxLogger{
logger: logger,
}
c.Set(ctxKey, l)
return c
}