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extension.go
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extension.go
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// Copyright 2019 Huawei Technologies Co.,Ltd.
// 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 obs
import (
"fmt"
"strconv"
"strings"
)
type extensionOptions interface{}
type extensionHeaders func(headers map[string][]string, isObs bool) error
type extensionProgressListener func() ProgressListener
func WithProgress(progressListener ProgressListener) extensionProgressListener {
return func() ProgressListener {
return progressListener
}
}
func setHeaderPrefix(key string, value string) extensionHeaders {
return func(headers map[string][]string, isObs bool) error {
if strings.TrimSpace(value) == "" {
return fmt.Errorf("set header %s with empty value", key)
}
setHeaders(headers, key, []string{value}, isObs)
return nil
}
}
// WithReqPaymentHeader sets header for requester-pays
func WithReqPaymentHeader(requester PayerType) extensionHeaders {
return setHeaderPrefix(REQUEST_PAYER, string(requester))
}
func WithTrafficLimitHeader(trafficLimit int64) extensionHeaders {
return setHeaderPrefix(TRAFFIC_LIMIT, strconv.FormatInt(trafficLimit, 10))
}
func WithCallbackHeader(callback string) extensionHeaders {
return setHeaderPrefix(CALLBACK, string(callback))
}
func WithCustomHeader(key string, value string) extensionHeaders {
return func(headers map[string][]string, isObs bool) error {
if strings.TrimSpace(value) == "" {
return fmt.Errorf("set header %s with empty value", key)
}
headers[key] = []string{value}
return nil
}
}