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key.go
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key.go
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package meta
import (
"context"
"github.com/alexfalkowski/go-service/limiter"
"github.com/alexfalkowski/go-service/meta"
)
const (
// UserAgentKey for meta.
UserAgentKey = "userAgent"
// IPAddrKey for meta.
IPAddrKey = "ipAddr"
)
var keys = map[string]limiter.KeyFunc{
"user-agent": UserAgent,
"ip": IPAddr,
}
// NewKey for meta.
func NewKey(cfg *limiter.Config) limiter.KeyFunc {
if !limiter.IsEnabled(cfg) {
return nil
}
if u, ok := keys[cfg.Kind]; ok {
return u
}
return nil
}
// WithUserAgent for transport.
func WithUserAgent(ctx context.Context, userAgent meta.Valuer) context.Context {
return meta.WithAttribute(ctx, UserAgentKey, userAgent)
}
// UserAgent for transport.
func UserAgent(ctx context.Context) meta.Valuer {
return meta.Attribute(ctx, UserAgentKey)
}
// WithIPAddr for transport.
func WithIPAddr(ctx context.Context, addr meta.Valuer) context.Context {
return meta.WithAttribute(ctx, IPAddrKey, addr)
}
// IPAddr for transport.
func IPAddr(ctx context.Context) meta.Valuer {
return meta.Attribute(ctx, IPAddrKey)
}