| package cdn |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import ( |
| "database/sql" |
| "errors" |
| "net/http" |
| "strconv" |
| |
| "github.com/apache/trafficcontrol/lib/go-tc" |
| "github.com/apache/trafficcontrol/traffic_ops/traffic_ops_golang/api" |
| "github.com/apache/trafficcontrol/traffic_ops/traffic_ops_golang/dbhelpers" |
| ) |
| |
| func DeleteName(w http.ResponseWriter, r *http.Request) { |
| inf, userErr, sysErr, errCode := api.NewInfo(r, []string{"name"}, nil) |
| if userErr != nil || sysErr != nil { |
| api.HandleErr(w, r, inf.Tx.Tx, errCode, userErr, sysErr) |
| return |
| } |
| defer inf.Close() |
| |
| cdnName := tc.CDNName(inf.Params["name"]) |
| cdnID, ok, err := getCDNIDFromName(inf.Tx.Tx, cdnName) |
| if err != nil { |
| api.HandleErr(w, r, inf.Tx.Tx, http.StatusInternalServerError, nil, errors.New("checking CDN existence: "+err.Error())) |
| return |
| } else if !ok { |
| api.HandleErr(w, r, inf.Tx.Tx, http.StatusNotFound, nil, nil) |
| return |
| } |
| if ok, err := cdnUnused(inf.Tx.Tx, cdnName); err != nil { |
| api.HandleErr(w, r, inf.Tx.Tx, http.StatusInternalServerError, nil, errors.New("checking CDN usage: "+err.Error())) |
| return |
| } else if !ok { |
| api.HandleErr(w, r, inf.Tx.Tx, http.StatusBadRequest, errors.New("Failed to delete cdn name = "+string(cdnName)+" has delivery services or servers"), nil) |
| return |
| } |
| userErr, sysErr, statusCode := dbhelpers.CheckIfCurrentUserCanModifyCDN(inf.Tx.Tx, string(cdnName), inf.User.UserName) |
| if userErr != nil || sysErr != nil { |
| api.HandleErr(w, r, inf.Tx.Tx, statusCode, userErr, sysErr) |
| return |
| } |
| if err := deleteCDNByName(inf.Tx.Tx, cdnName); err != nil { |
| api.HandleErr(w, r, inf.Tx.Tx, http.StatusInternalServerError, nil, errors.New("deleting CDN: "+err.Error())) |
| return |
| } |
| api.WriteRespAlert(w, r, tc.SuccessLevel, "cdn was deleted.") |
| api.CreateChangeLogRawTx(api.ApiChange, "CDN: "+string(cdnName)+", ID: "+strconv.Itoa(cdnID)+", ACTION: Deleted CDN", inf.User, inf.Tx.Tx) |
| } |
| |
| func deleteCDNByName(tx *sql.Tx, name tc.CDNName) error { |
| if _, err := tx.Exec(`DELETE FROM cdn WHERE name = $1`, name); err != nil { |
| return errors.New("deleting cdns: " + err.Error()) |
| } |
| return nil |
| } |
| |
| func cdnUnused(tx *sql.Tx, name tc.CDNName) (bool, error) { |
| useCount := 0 |
| if err := tx.QueryRow(` |
| WITH cdn_id as ( |
| SELECT id as v FROM cdn WHERE name = $1 |
| ) |
| SELECT |
| (SELECT COUNT(*) FROM server WHERE server.cdn_id = (select v from cdn_id)) + |
| (SELECT COUNT(*) FROM deliveryservice WHERE deliveryservice.cdn_id = (select v from cdn_id)) |
| `, name).Scan(&useCount); err != nil { |
| return false, errors.New("querying cdn use count: " + err.Error()) |
| } |
| if useCount > 0 { |
| return false, nil |
| } |
| return true, nil |
| } |