139 lines
3.5 KiB
Go
139 lines
3.5 KiB
Go
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package endpoints
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import (
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"encoding/json"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk/requests"
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"sync"
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"time"
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)
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const (
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EndpointCacheExpireTime = 3600 //Seconds
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)
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var lastClearTimePerProduct = struct {
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sync.RWMutex
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cache map[string]int64
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}{cache: make(map[string]int64)}
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var endpointCache = struct {
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sync.RWMutex
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cache map[string]string
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}{cache: make(map[string]string)}
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type LocationResolver struct {
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}
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func (resolver *LocationResolver) TryResolve(param *ResolveParam) (endpoint string, support bool, err error) {
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if len(param.LocationProduct) <= 0 {
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support = false
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return
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}
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//get from cache
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cacheKey := param.Product + "#" + param.RegionId
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if endpointCache.cache != nil && len(endpointCache.cache[cacheKey]) > 0 && !CheckCacheIsExpire(cacheKey) {
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endpoint = endpointCache.cache[cacheKey]
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support = true
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return
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}
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//get from remote
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getEndpointRequest := requests.NewCommonRequest()
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getEndpointRequest.Product = "Location"
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getEndpointRequest.Version = "2015-06-12"
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getEndpointRequest.ApiName = "DescribeEndpoints"
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getEndpointRequest.Domain = "location.aliyuncs.com"
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getEndpointRequest.Method = "GET"
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getEndpointRequest.Scheme = requests.HTTPS
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getEndpointRequest.QueryParams["Id"] = param.RegionId
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getEndpointRequest.QueryParams["ServiceCode"] = param.LocationProduct
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if len(param.LocationEndpointType) > 0 {
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getEndpointRequest.QueryParams["Type"] = param.LocationEndpointType
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} else {
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getEndpointRequest.QueryParams["Type"] = "openAPI"
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}
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response, err := param.CommonApi(getEndpointRequest)
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var getEndpointResponse GetEndpointResponse
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if !response.IsSuccess() {
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support = false
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return
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}
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json.Unmarshal([]byte(response.GetHttpContentString()), &getEndpointResponse)
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if !getEndpointResponse.Success || getEndpointResponse.Endpoints == nil {
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support = false
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return
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}
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if len(getEndpointResponse.Endpoints.Endpoint) <= 0 {
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support = false
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return
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}
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if len(getEndpointResponse.Endpoints.Endpoint[0].Endpoint) > 0 {
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endpoint = getEndpointResponse.Endpoints.Endpoint[0].Endpoint
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endpointCache.Lock()
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endpointCache.cache[cacheKey] = endpoint
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endpointCache.Unlock()
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lastClearTimePerProduct.Lock()
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lastClearTimePerProduct.cache[cacheKey] = time.Now().Unix()
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lastClearTimePerProduct.Unlock()
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support = true
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return
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}
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support = false
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return
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}
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func CheckCacheIsExpire(cacheKey string) bool {
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lastClearTime := lastClearTimePerProduct.cache[cacheKey]
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if lastClearTime <= 0 {
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lastClearTime = time.Now().Unix()
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lastClearTimePerProduct.Lock()
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lastClearTimePerProduct.cache[cacheKey] = lastClearTime
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lastClearTimePerProduct.Unlock()
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}
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now := time.Now().Unix()
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elapsedTime := now - lastClearTime
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if elapsedTime > EndpointCacheExpireTime {
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return true
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}
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return false
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}
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type GetEndpointResponse struct {
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Endpoints *EndpointsObj
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RequestId string
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Success bool
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}
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type EndpointsObj struct {
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Endpoint []EndpointObj
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}
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type EndpointObj struct {
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Protocols map[string]string
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Type string
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Namespace string
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Id string
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SerivceCode string
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Endpoint string
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}
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