iot_server/internal/pkg/utils/context.go

30 lines
1.0 KiB
Go

/*******************************************************************************
* Copyright 2019 Dell Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*******************************************************************************/
package utils
import (
"context"
)
// FromContext allows for the retrieval of the specified key's value from the supplied Context.
// If the value is not found, an empty string is returned.
func FromContext(ctx context.Context, key string) string {
hdr, ok := ctx.Value(key).(string)
if !ok {
hdr = ""
}
return hdr
}