Xray-core/core/context.go

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2020-11-25 11:01:53 +00:00
package core
import (
"context"
)
// XrayKey is the key type of Instance in Context, exported for test.
type XrayKey int
const xrayKey XrayKey = 1
// FromContext returns an Instance from the given context, or nil if the context doesn't contain one.
func FromContext(ctx context.Context) *Instance {
if s, ok := ctx.Value(xrayKey).(*Instance); ok {
return s
}
return nil
}
// MustFromContext returns an Instance from the given context, or panics if not present.
func MustFromContext(ctx context.Context) *Instance {
x := FromContext(ctx)
if x == nil {
panic("X is not in context.")
}
return x
}