80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
package provider
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import (
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"os"
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"path/filepath"
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"strings"
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"github.com/BurntSushi/toml"
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log "github.com/Sirupsen/logrus"
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"github.com/containous/traefik/safe"
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"github.com/containous/traefik/types"
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"gopkg.in/fsnotify.v1"
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)
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// File holds configurations of the File provider.
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type File struct {
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BaseProvider `mapstructure:",squash"`
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}
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// Provide allows the provider to provide configurations to traefik
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// using the given configuration channel.
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func (provider *File) Provide(configurationChan chan<- types.ConfigMessage) error {
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watcher, err := fsnotify.NewWatcher()
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if err != nil {
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log.Error("Error creating file watcher", err)
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return err
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}
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file, err := os.Open(provider.Filename)
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if err != nil {
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log.Error("Error opening file", err)
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return err
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}
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defer file.Close()
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if provider.Watch {
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// Process events
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safe.Go(func() {
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defer watcher.Close()
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for {
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select {
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case event := <-watcher.Events:
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if strings.Contains(event.Name, file.Name()) {
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log.Debug("File event:", event)
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configuration := provider.loadFileConfig(file.Name())
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if configuration != nil {
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configurationChan <- types.ConfigMessage{
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ProviderName: "file",
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Configuration: configuration,
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}
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}
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}
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case error := <-watcher.Errors:
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log.Error("Watcher event error", error)
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}
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}
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})
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err = watcher.Add(filepath.Dir(file.Name()))
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if err != nil {
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log.Error("Error adding file watcher", err)
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return err
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}
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}
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configuration := provider.loadFileConfig(file.Name())
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configurationChan <- types.ConfigMessage{
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ProviderName: "file",
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Configuration: configuration,
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}
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return nil
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}
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func (provider *File) loadFileConfig(filename string) *types.Configuration {
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configuration := new(types.Configuration)
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if _, err := toml.DecodeFile(filename, configuration); err != nil {
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log.Error("Error reading file:", err)
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return nil
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}
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return configuration
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}
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