traefik/vendor/github.com/aliyun/alibaba-cloud-sdk-go/sdk/endpoints/resolver.go

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2018-09-14 08:06:03 +00:00
/*
* 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 endpoints
import (
"encoding/json"
"fmt"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/errors"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/requests"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/responses"
"sync"
)
const (
ResolveEndpointUserGuideLink = ""
)
var once sync.Once
var resolvers []Resolver
type Resolver interface {
TryResolve(param *ResolveParam) (endpoint string, support bool, err error)
}
func Resolve(param *ResolveParam) (endpoint string, err error) {
supportedResolvers := getAllResolvers()
for _, resolver := range supportedResolvers {
endpoint, supported, err := resolver.TryResolve(param)
if supported {
return endpoint, err
}
}
// not support
errorMsg := fmt.Sprintf(errors.CanNotResolveEndpointErrorMessage, param, ResolveEndpointUserGuideLink)
err = errors.NewClientError(errors.CanNotResolveEndpointErrorCode, errorMsg, nil)
return
}
func getAllResolvers() []Resolver {
once.Do(func() {
resolvers = []Resolver{
&SimpleHostResolver{},
&MappingResolver{},
&LocationResolver{},
&LocalRegionalResolver{},
&LocalGlobalResolver{},
}
})
return resolvers
}
type ResolveParam struct {
Domain string
Product string
RegionId string
LocationProduct string
LocationEndpointType string
CommonApi func(request *requests.CommonRequest) (response *responses.CommonResponse, err error) `json:"-"`
}
func (param *ResolveParam) String() string {
jsonBytes, err := json.Marshal(param)
if err != nil {
return fmt.Sprint("ResolveParam.String() process error:", err)
}
return string(jsonBytes)
}