mirror of
https://github.com/yunionio/cloudpods.git
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107 lines
2.9 KiB
Go
107 lines
2.9 KiB
Go
// Copyright 2019 Yunion
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//
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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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package apsara
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import (
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"fmt"
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"reflect"
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"yunion.io/x/jsonutils"
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"yunion.io/x/log"
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)
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type jsonRequestFunc func(action string, params map[string]string) (jsonutils.JSONObject, error)
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func unmarshalResult(resp jsonutils.JSONObject, respErr error, resultKey []string, result interface{}) error {
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if respErr != nil {
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return respErr
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}
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if result == nil {
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return nil
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}
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if resultKey != nil && len(resultKey) > 0 {
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respErr = resp.Unmarshal(result, resultKey...)
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} else {
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respErr = resp.Unmarshal(result)
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}
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if respErr != nil {
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log.Errorf("unmarshal json error %s", respErr)
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}
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return nil
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}
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func doListPart(client jsonRequestFunc, action string, limit int, offset int, params map[string]string, resultKey []string, result interface{}) (int, int, error) {
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params["PageSize"] = fmt.Sprintf("%d", limit)
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params["PageNumber"] = fmt.Sprintf("%d", (offset/limit)+1)
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ret, err := client(action, params)
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if err != nil {
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return 0, 0, err
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}
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total, _ := ret.Int("TotalCount")
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var lst []jsonutils.JSONObject
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lst, err = ret.GetArray(resultKey...)
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if err != nil {
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return 0, 0, nil
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}
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resultValue := reflect.Indirect(reflect.ValueOf(result))
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elemType := resultValue.Type().Elem()
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for i := range lst {
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elemPtr := reflect.New(elemType)
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err = lst[i].Unmarshal(elemPtr.Interface())
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if err != nil {
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return 0, 0, err
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}
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resultValue.Set(reflect.Append(resultValue, elemPtr.Elem()))
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}
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return int(total), len(lst), nil
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}
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// 执行操作
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func DoAction(client jsonRequestFunc, action string, params map[string]string, resultKey []string, result interface{}) error {
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resp, err := client(action, params)
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return unmarshalResult(resp, err, resultKey, result)
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}
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// 遍历所有结果
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func DoListAll(client jsonRequestFunc, action string, params map[string]string, resultKey []string, result interface{}) error {
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pageLimit := 50
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offset := 0
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resultValue := reflect.Indirect(reflect.ValueOf(result))
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for {
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total, part, err := doListPart(client, action, pageLimit, offset, params, resultKey, result)
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if err != nil {
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return err
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}
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// total 大于零的情况下通过total字段判断列表是否遍历完成。total不存在或者为0的情况下，通过返回列表的长度判断是否遍历完成
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if (total > 0 && resultValue.Len() >= total) || (total == 0 && pageLimit > part) {
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break
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}
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offset = resultValue.Len()
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}
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return nil
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}
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