98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
// Copyright 2016 The Chihaya Authors. All rights reserved.
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// Use of this source code is governed by the BSD 2-Clause license,
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// which can be found in the LICENSE file.
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package chihaya
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import (
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"io"
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"io/ioutil"
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"os"
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"time"
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"gopkg.in/yaml.v2"
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)
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// DefaultConfig is a sane configuration used as a fallback or for testing.
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var DefaultConfig = Config{
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Tracker: TrackerConfig{
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AnnounceInterval: 30 * time.Minute,
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MinAnnounceInterval: 20 * time.Minute,
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AnnounceMiddleware: []MiddlewareConfig{},
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ScrapeMiddleware: []MiddlewareConfig{},
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},
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Servers: []ServerConfig{},
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}
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// Config represents the global configuration of a chihaya binary.
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type Config struct {
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Tracker TrackerConfig `yaml:"tracker"`
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Servers []ServerConfig `yaml:"servers"`
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}
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// TrackerConfig represents the configuration of protocol-agnostic BitTorrent
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// Tracker used by Servers started by chihaya.
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type TrackerConfig struct {
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AnnounceInterval time.Duration `yaml:"announce"`
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MinAnnounceInterval time.Duration `yaml:"min_announce"`
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AnnounceMiddleware []MiddlewareConfig `yaml:"announce_middleware"`
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ScrapeMiddleware []MiddlewareConfig `yaml:"scrape_middleware"`
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}
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// MiddlewareConfig represents the configuration of a middleware used by
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// the tracker.
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type MiddlewareConfig struct {
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Name string `yaml:"name"`
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Config interface{} `yaml:"config"`
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}
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// ServerConfig represents the configuration of the Servers started by chihaya.
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type ServerConfig struct {
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Name string `yaml:"name"`
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Config interface{} `yaml:"config"`
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}
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// ConfigFile represents a YAML configuration file that namespaces all chihaya
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// configuration under the "chihaya" namespace.
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type ConfigFile struct {
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Chihaya Config `yaml:"chihaya"`
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}
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// DecodeConfigFile unmarshals an io.Reader into a new Config.
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func DecodeConfigFile(r io.Reader) (*Config, error) {
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contents, err := ioutil.ReadAll(r)
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if err != nil {
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return nil, err
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}
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cfgFile := &ConfigFile{}
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err = yaml.Unmarshal(contents, cfgFile)
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if err != nil {
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return nil, err
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}
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return &cfgFile.Chihaya, nil
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}
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// OpenConfigFile returns a new Config given the path to a YAML configuration
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// file.
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// It supports relative and absolute paths and environment variables.
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// Given "", it returns DefaultConfig.
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func OpenConfigFile(path string) (*Config, error) {
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if path == "" {
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return &DefaultConfig, nil
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}
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f, err := os.Open(os.ExpandEnv(path))
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if err != nil {
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return nil, err
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}
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defer f.Close()
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cfg, err := DecodeConfigFile(f)
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if err != nil {
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return nil, err
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}
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return cfg, nil
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}
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