/* * Copyright (C) 2017 "IoT.bzh" * Author Sebastien Douheret <sebastien@iot.bzh> * * 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 xdsconfig import ( "encoding/json" "os" "os/user" "path" "path/filepath" "strings" common "github.com/iotbzh/xds-common/golib" ) // ConfigDir Directory in user HOME directory where xds config will be saved var ConfigDir = path.Join(".xds", "server") const ( // GlobalConfigFilename Global config filename GlobalConfigFilename = "server-config.json" // ServerDataFilename Server data filename ServerDataFilename = "server-data.xml" // FoldersConfigFilename Folders config filename FoldersConfigFilename = "server-config_folders.xml" ) // SyncThingConf definition type SyncThingConf struct { BinDir string `json:"binDir"` Home string `json:"home"` GuiAddress string `json:"gui-address"` GuiAPIKey string `json:"gui-apikey"` RescanIntervalS int `json:"rescanIntervalS"` } // FileConfig is the JSON structure of xds-server config file (server-config.json) type FileConfig struct { WebAppDir string `json:"webAppDir"` ShareRootDir string `json:"shareRootDir"` SdkScriptsDir string `json:"sdkScriptsDir"` HTTPPort string `json:"httpPort"` SThgConf *SyncThingConf `json:"syncthing"` LogsDir string `json:"logsDir"` } // readGlobalConfig reads configuration from a config file. // Order to determine which config file is used: // 1/ from command line option: "--config myConfig.json" // 2/ $HOME/.xds/server/server-config.json file // 3/ /etc/xds/server/server-config.json file // 4/ <xds-server executable dir>/server-config.json file func readGlobalConfig(c *Config, confFile string) error { searchIn := make([]string, 0, 3) if confFile != "" { searchIn = append(searchIn, confFile) } if usr, err := user.Current(); err == nil { searchIn = append(searchIn, path.Join(usr.HomeDir, ConfigDir, GlobalConfigFilename)) } searchIn = append(searchIn, "/etc/xds/server/server-config.json") exePath := os.Args[0] ee, _ := os.Executable() exeAbsPath, err := filepath.Abs(ee) if err == nil { exePath, err = filepath.EvalSymlinks(exeAbsPath) if err == nil { exePath = filepath.Dir(ee) } else { exePath = filepath.Dir(exeAbsPath) } } searchIn = append(searchIn, path.Join(exePath, "server-config.json")) var cFile *string for _, p := range searchIn { if _, err := os.Stat(p); err == nil { cFile = &p break } } if cFile == nil { // No config file found return nil } c.Log.Infof("Use config file: %s", *cFile) // TODO move on viper package to support comments in JSON and also // bind with flags (command line options) // see https://github.com/spf13/viper#working-with-flags fd, _ := os.Open(*cFile) defer fd.Close() fCfg := FileConfig{} if err := json.NewDecoder(fd).Decode(&fCfg); err != nil { return err } // Support environment variables (IOW ${MY_ENV_VAR} syntax) in server-config.json vars := []*string{ &fCfg.WebAppDir, &fCfg.ShareRootDir, &fCfg.SdkScriptsDir, &fCfg.LogsDir} if fCfg.SThgConf != nil { vars = append(vars, &fCfg.SThgConf.Home, &fCfg.SThgConf.BinDir) } for _, field := range vars { var err error if *field, err = common.ResolveEnvVar(*field); err != nil { return err } } // Use config file settings else use default config if fCfg.WebAppDir == "" { fCfg.WebAppDir = c.FileConf.WebAppDir } if fCfg.ShareRootDir == "" { fCfg.ShareRootDir = c.FileConf.ShareRootDir } if fCfg.SdkScriptsDir == "" { fCfg.SdkScriptsDir = c.FileConf.SdkScriptsDir } if fCfg.HTTPPort == "" { fCfg.HTTPPort = c.FileConf.HTTPPort } if fCfg.LogsDir == "" { fCfg.LogsDir = c.FileConf.LogsDir } // Resolve webapp dir (support relative or full path) fCfg.WebAppDir = strings.Trim(fCfg.WebAppDir, " ") if !strings.HasPrefix(fCfg.WebAppDir, "/") && exePath != "" { cwd, _ := os.Getwd() // Check first from current directory for _, rootD := range []string{exePath, cwd} { ff := path.Join(rootD, fCfg.WebAppDir, "index.html") if common.Exists(ff) { fCfg.WebAppDir = path.Join(rootD, fCfg.WebAppDir) break } } } c.FileConf = fCfg return nil } func configFilenameGet(cfgFile string) (string, error) { usr, err := user.Current() if err != nil { return "", err } return path.Join(usr.HomeDir, ConfigDir, cfgFile), nil } // FoldersConfigFilenameGet func FoldersConfigFilenameGet() (string, error) { return configFilenameGet(FoldersConfigFilename) } // ServerDataFilenameGet func ServerDataFilenameGet() (string, error) { return configFilenameGet(ServerDataFilename) }