347 lines
9.4 KiB
Go
347 lines
9.4 KiB
Go
package config
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import (
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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"time"
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homedir "github.com/mitchellh/go-homedir"
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"github.com/urfave/cli/v2"
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"gopkg.in/yaml.v2"
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"github.com/cloudflare/cloudflared/logger"
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"github.com/cloudflare/cloudflared/validation"
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)
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var (
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// DefaultConfigFiles is the file names from which we attempt to read configuration.
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DefaultConfigFiles = []string{"config.yml", "config.yaml"}
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// DefaultUnixConfigLocation is the primary location to find a config file
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DefaultUnixConfigLocation = "/usr/local/etc/cloudflared"
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// DefaultUnixLogLocation is the primary location to find log files
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DefaultUnixLogLocation = "/var/log/cloudflared"
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// Launchd doesn't set root env variables, so there is default
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// Windows default config dir was ~/cloudflare-warp in documentation; let's keep it compatible
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defaultUserConfigDirs = []string{"~/.cloudflared", "~/.cloudflare-warp", "~/cloudflare-warp"}
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defaultNixConfigDirs = []string{"/etc/cloudflared", DefaultUnixConfigLocation}
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ErrNoConfigFile = fmt.Errorf("Cannot determine default configuration path. No file %v in %v", DefaultConfigFiles, DefaultConfigSearchDirectories())
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)
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const DefaultCredentialFile = "cert.pem"
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// DefaultConfigDirectory returns the default directory of the config file
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func DefaultConfigDirectory() string {
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if runtime.GOOS == "windows" {
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path := os.Getenv("CFDPATH")
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if path == "" {
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path = filepath.Join(os.Getenv("ProgramFiles(x86)"), "cloudflared")
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if _, err := os.Stat(path); os.IsNotExist(err) { //doesn't exist, so return an empty failure string
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return ""
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}
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}
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return path
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}
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return DefaultUnixConfigLocation
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}
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// DefaultLogDirectory returns the default directory for log files
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func DefaultLogDirectory() string {
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if runtime.GOOS == "windows" {
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return DefaultConfigDirectory()
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}
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return DefaultUnixLogLocation
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}
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// DefaultConfigPath returns the default location of a config file
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func DefaultConfigPath() string {
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dir := DefaultConfigDirectory()
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if dir == "" {
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return DefaultConfigFiles[0]
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}
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return filepath.Join(dir, DefaultConfigFiles[0])
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}
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// DefaultConfigSearchDirectories returns the default folder locations of the config
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func DefaultConfigSearchDirectories() []string {
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dirs := make([]string, len(defaultUserConfigDirs))
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copy(dirs, defaultUserConfigDirs)
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if runtime.GOOS != "windows" {
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dirs = append(dirs, defaultNixConfigDirs...)
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}
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return dirs
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}
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// FileExists checks to see if a file exist at the provided path.
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func FileExists(path string) (bool, error) {
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f, err := os.Open(path)
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if err != nil {
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if os.IsNotExist(err) {
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// ignore missing files
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return false, nil
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}
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return false, err
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}
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f.Close()
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return true, nil
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}
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// FindDefaultConfigPath returns the first path that contains a config file.
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// If none of the combination of DefaultConfigSearchDirectories() and DefaultConfigFiles
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// contains a config file, return empty string.
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func FindDefaultConfigPath() string {
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for _, configDir := range DefaultConfigSearchDirectories() {
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for _, configFile := range DefaultConfigFiles {
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dirPath, err := homedir.Expand(configDir)
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if err != nil {
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continue
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}
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path := filepath.Join(dirPath, configFile)
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if ok, _ := FileExists(path); ok {
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return path
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}
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}
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}
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return ""
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}
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// FindOrCreateConfigPath returns the first path that contains a config file
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// or creates one in the primary default path if it doesn't exist
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func FindOrCreateConfigPath() string {
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path := FindDefaultConfigPath()
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if path == "" {
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// create the default directory if it doesn't exist
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path = DefaultConfigPath()
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if err := os.MkdirAll(filepath.Dir(path), os.ModePerm); err != nil {
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return ""
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}
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// write a new config file out
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file, err := os.Create(path)
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if err != nil {
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return ""
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}
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defer file.Close()
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logDir := DefaultLogDirectory()
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os.MkdirAll(logDir, os.ModePerm) //try and create it. Doesn't matter if it succeed or not, only byproduct will be no logs
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c := Root{
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LogDirectory: logDir,
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}
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if err := yaml.NewEncoder(file).Encode(&c); err != nil {
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return ""
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}
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}
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return path
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}
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// FindLogSettings gets the log directory and level from the config file
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func FindLogSettings() (string, string) {
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configPath := FindOrCreateConfigPath()
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defaultDirectory := DefaultLogDirectory()
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defaultLevel := "info"
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file, err := os.Open(configPath)
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if err != nil {
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return defaultDirectory, defaultLevel
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}
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defer file.Close()
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var config Root
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if err := yaml.NewDecoder(file).Decode(&config); err != nil {
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return defaultDirectory, defaultLevel
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}
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directory := defaultDirectory
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if config.LogDirectory != "" {
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directory = config.LogDirectory
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}
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level := defaultLevel
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if config.LogLevel != "" {
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level = config.LogLevel
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}
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return directory, level
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}
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// ValidateUnixSocket ensures --unix-socket param is used exclusively
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// i.e. it fails if a user specifies both --url and --unix-socket
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func ValidateUnixSocket(c *cli.Context) (string, error) {
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if c.IsSet("unix-socket") && (c.IsSet("url") || c.NArg() > 0) {
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return "", errors.New("--unix-socket must be used exclusivly.")
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}
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return c.String("unix-socket"), nil
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}
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// ValidateUrl will validate url flag correctness. It can be either from --url or argument
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// Notice ValidateUnixSocket, it will enforce --unix-socket is not used with --url or argument
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func ValidateUrl(c *cli.Context, allowFromArgs bool) (string, error) {
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var url = c.String("url")
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if allowFromArgs && c.NArg() > 0 {
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if c.IsSet("url") {
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return "", errors.New("Specified origin urls using both --url and argument. Decide which one you want, I can only support one.")
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}
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url = c.Args().Get(0)
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}
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validUrl, err := validation.ValidateUrl(url)
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return validUrl, err
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}
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type UnvalidatedIngressRule struct {
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Hostname string
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Path string
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Service string
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}
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type Configuration struct {
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TunnelID string `yaml:"tunnel"`
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Ingress []UnvalidatedIngressRule
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sourceFile string
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}
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type configFileSettings struct {
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Configuration `yaml:",inline"`
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// older settings will be aggregated into the generic map, should be read via cli.Context
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Settings map[string]interface{} `yaml:",inline"`
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}
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func (c *Configuration) Source() string {
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return c.sourceFile
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}
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func (c *configFileSettings) Int(name string) (int, error) {
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if raw, ok := c.Settings[name]; ok {
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if v, ok := raw.(int); ok {
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return v, nil
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}
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return 0, fmt.Errorf("expected int found %T for %s", raw, name)
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}
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return 0, nil
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}
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func (c *configFileSettings) Duration(name string) (time.Duration, error) {
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if raw, ok := c.Settings[name]; ok {
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switch v := raw.(type) {
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case time.Duration:
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return v, nil
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case string:
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return time.ParseDuration(v)
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}
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return 0, fmt.Errorf("expected duration found %T for %s", raw, name)
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}
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return 0, nil
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}
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func (c *configFileSettings) Float64(name string) (float64, error) {
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if raw, ok := c.Settings[name]; ok {
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if v, ok := raw.(float64); ok {
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return v, nil
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}
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return 0, fmt.Errorf("expected float found %T for %s", raw, name)
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}
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return 0, nil
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}
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func (c *configFileSettings) String(name string) (string, error) {
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if raw, ok := c.Settings[name]; ok {
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if v, ok := raw.(string); ok {
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return v, nil
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}
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return "", fmt.Errorf("expected string found %T for %s", raw, name)
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}
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return "", nil
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}
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func (c *configFileSettings) StringSlice(name string) ([]string, error) {
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if raw, ok := c.Settings[name]; ok {
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if slice, ok := raw.([]interface{}); ok {
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strSlice := make([]string, len(slice))
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for i, v := range slice {
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str, ok := v.(string)
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if !ok {
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return nil, fmt.Errorf("expected string, found %T for %v", i, v)
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}
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strSlice[i] = str
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}
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return strSlice, nil
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}
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return nil, fmt.Errorf("expected string slice found %T for %s", raw, name)
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}
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return nil, nil
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}
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func (c *configFileSettings) IntSlice(name string) ([]int, error) {
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if raw, ok := c.Settings[name]; ok {
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if slice, ok := raw.([]interface{}); ok {
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intSlice := make([]int, len(slice))
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for i, v := range slice {
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str, ok := v.(int)
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if !ok {
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return nil, fmt.Errorf("expected int, found %T for %v ", v, v)
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}
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intSlice[i] = str
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}
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return intSlice, nil
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}
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if v, ok := raw.([]int); ok {
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return v, nil
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}
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return nil, fmt.Errorf("expected int slice found %T for %s", raw, name)
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}
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return nil, nil
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}
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func (c *configFileSettings) Generic(name string) (cli.Generic, error) {
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return nil, errors.New("option type Generic not supported")
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}
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func (c *configFileSettings) Bool(name string) (bool, error) {
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if raw, ok := c.Settings[name]; ok {
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if v, ok := raw.(bool); ok {
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return v, nil
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}
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return false, fmt.Errorf("expected boolean found %T for %s", raw, name)
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}
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return false, nil
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}
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var configuration configFileSettings
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func GetConfiguration() *Configuration {
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return &configuration.Configuration
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}
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// ReadConfigFile returns InputSourceContext initialized from the configuration file.
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// On repeat calls returns with the same file, returns without reading the file again; however,
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// if value of "config" flag changes, will read the new config file
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func ReadConfigFile(c *cli.Context, log logger.Service) (*configFileSettings, error) {
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configFile := c.String("config")
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if configuration.Source() == configFile || configFile == "" {
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return &configuration, nil
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}
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log.Debugf("Loading configuration from %s", configFile)
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file, err := os.Open(configFile)
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if err != nil {
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if os.IsNotExist(err) {
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err = ErrNoConfigFile
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}
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return nil, err
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}
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defer file.Close()
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if err := yaml.NewDecoder(file).Decode(&configuration); err != nil {
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return nil, err
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}
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configuration.sourceFile = configFile
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return &configuration, nil
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}
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