| package iso |
| |
| /* |
| * 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" |
| "encoding/json" |
| "io/ioutil" |
| "net/http" |
| "os" |
| "path/filepath" |
| |
| "github.com/apache/trafficcontrol/lib/go-log" |
| "github.com/apache/trafficcontrol/lib/go-tc" |
| "github.com/apache/trafficcontrol/traffic_ops/traffic_ops_golang/api" |
| "github.com/jmoiron/sqlx" |
| ) |
| |
| // GetOSVersions returns a map of available Operating System (OS) versions for ISO generation, |
| // as well as the name of the directory where the "kickstarter" files are found. |
| // |
| // The returned data comes from a configuration file. There's a default location of the config file |
| // which can be overridden via a Parameter database entry. |
| // |
| // Note: The api.CRUDer interface could not be used for this endpoint because the original Perl |
| // endpoint returned a single JSON object, whereas the CRUDer interface returns an array of JSON |
| // objects per the Read method. |
| func GetOSVersions(w http.ResponseWriter, r *http.Request) { |
| inf, userErr, sysErr, errCode := api.NewInfo(r, nil, nil) |
| if userErr != nil || sysErr != nil { |
| api.HandleErr(w, r, inf.Tx.Tx, errCode, userErr, sysErr) |
| return |
| } |
| defer inf.Close() |
| |
| api.RespWriter(w, r, inf.Tx.Tx)(getOSVersions(inf.Tx)) |
| } |
| |
| // getOSVersions is used in conjunction with GetOSVersions. It returns |
| // a mapping of OS names to their respective directories. |
| func getOSVersions(tx *sqlx.Tx) (tc.OSVersionsResponse, error) { |
| cfgPath, err := osversionCfgPath(tx) |
| if err != nil { |
| return nil, err |
| } |
| |
| b, err := ioutil.ReadFile(cfgPath) |
| if err != nil { |
| // Warn if the old Perl config file exists, but there's an |
| // error reading the file from the new location. |
| oldCfgPath := filepath.Join(filepath.Dir(cfgPath), cfgFilenamePerl) |
| if _, statErr := os.Stat(oldCfgPath); statErr == nil { |
| log.Warnf("The configuration file for the /osversions endpoint has changed from %q to %q: %v", oldCfgPath, cfgPath, err) |
| } |
| return nil, err |
| } |
| |
| var data tc.OSVersionsResponse |
| if err = json.Unmarshal(b, &data); err != nil { |
| return nil, err |
| } |
| |
| return data, nil |
| } |
| |
| // osversionsCfgPath returns a path to the configuration file |
| // containing the OS versions data. The name of the configuration |
| // file is constant, but a specific Parameter database entry can update the |
| // directory where the file is expected. |
| func osversionCfgPath(tx *sqlx.Tx) (string, error) { |
| var cfgDir string |
| err := tx.QueryRow( |
| `SELECT value FROM parameter WHERE name = $1 AND config_file = $2 LIMIT 1`, |
| ksFilesParamName, |
| ksFilesParamConfigFile, |
| ).Scan(&cfgDir) |
| if err != nil && err != sql.ErrNoRows { |
| return "", err |
| } |
| |
| if cfgDir == "" { |
| cfgDir = cfgDefaultDir |
| } |
| |
| return filepath.Join(cfgDir, cfgFilename), nil |
| } |