traefik/vendor/github.com/aliyun/alibaba-cloud-sdk-go/sdk/endpoints/location_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"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/requests"
"sync"
"time"
)
const (
EndpointCacheExpireTime = 3600 //Seconds
)
var lastClearTimePerProduct = struct {
sync.RWMutex
cache map[string]int64
}{cache: make(map[string]int64)}
var endpointCache = struct {
sync.RWMutex
cache map[string]string
}{cache: make(map[string]string)}
type LocationResolver struct {
}
func (resolver *LocationResolver) TryResolve(param *ResolveParam) (endpoint string, support bool, err error) {
if len(param.LocationProduct) <= 0 {
support = false
return
}
//get from cache
cacheKey := param.Product + "#" + param.RegionId
if endpointCache.cache != nil && len(endpointCache.cache[cacheKey]) > 0 && !CheckCacheIsExpire(cacheKey) {
endpoint = endpointCache.cache[cacheKey]
support = true
return
}
//get from remote
getEndpointRequest := requests.NewCommonRequest()
getEndpointRequest.Product = "Location"
getEndpointRequest.Version = "2015-06-12"
getEndpointRequest.ApiName = "DescribeEndpoints"
getEndpointRequest.Domain = "location.aliyuncs.com"
getEndpointRequest.Method = "GET"
getEndpointRequest.Scheme = requests.HTTPS
getEndpointRequest.QueryParams["Id"] = param.RegionId
getEndpointRequest.QueryParams["ServiceCode"] = param.LocationProduct
if len(param.LocationEndpointType) > 0 {
getEndpointRequest.QueryParams["Type"] = param.LocationEndpointType
} else {
getEndpointRequest.QueryParams["Type"] = "openAPI"
}
response, err := param.CommonApi(getEndpointRequest)
var getEndpointResponse GetEndpointResponse
if !response.IsSuccess() {
support = false
return
}
json.Unmarshal([]byte(response.GetHttpContentString()), &getEndpointResponse)
if !getEndpointResponse.Success || getEndpointResponse.Endpoints == nil {
support = false
return
}
if len(getEndpointResponse.Endpoints.Endpoint) <= 0 {
support = false
return
}
if len(getEndpointResponse.Endpoints.Endpoint[0].Endpoint) > 0 {
endpoint = getEndpointResponse.Endpoints.Endpoint[0].Endpoint
endpointCache.Lock()
endpointCache.cache[cacheKey] = endpoint
endpointCache.Unlock()
lastClearTimePerProduct.Lock()
lastClearTimePerProduct.cache[cacheKey] = time.Now().Unix()
lastClearTimePerProduct.Unlock()
support = true
return
}
support = false
return
}
func CheckCacheIsExpire(cacheKey string) bool {
lastClearTime := lastClearTimePerProduct.cache[cacheKey]
if lastClearTime <= 0 {
lastClearTime = time.Now().Unix()
lastClearTimePerProduct.Lock()
lastClearTimePerProduct.cache[cacheKey] = lastClearTime
lastClearTimePerProduct.Unlock()
}
now := time.Now().Unix()
elapsedTime := now - lastClearTime
if elapsedTime > EndpointCacheExpireTime {
return true
}
return false
}
type GetEndpointResponse struct {
Endpoints *EndpointsObj
RequestId string
Success bool
}
type EndpointsObj struct {
Endpoint []EndpointObj
}
type EndpointObj struct {
Protocols map[string]string
Type string
Namespace string
Id string
SerivceCode string
Endpoint string
}