142 lines
3.8 KiB
Go
142 lines
3.8 KiB
Go
package main
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import (
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"errors"
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"io/ioutil"
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"os"
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"gopkg.in/yaml.v2"
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httpfrontend "github.com/chihaya/chihaya/frontend/http"
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udpfrontend "github.com/chihaya/chihaya/frontend/udp"
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"github.com/chihaya/chihaya/middleware"
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"github.com/chihaya/chihaya/middleware/clientapproval"
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"github.com/chihaya/chihaya/middleware/jwt"
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"github.com/chihaya/chihaya/middleware/varinterval"
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// Imported to register as Storage Drivers.
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_ "github.com/chihaya/chihaya/storage/memory"
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_ "github.com/chihaya/chihaya/storage/memorybysubnet"
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)
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type hookConfig 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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type hookConfigs []hookConfig
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// Names returns all hook names listed in the configuration.
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func (hookCfgs hookConfigs) Names() (hookNames []string) {
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hookNames = make([]string, len(hookCfgs))
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for index, hookCfg := range hookCfgs {
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hookNames[index] = hookCfg.Name
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}
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return
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}
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type storageConfig 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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// Config represents the configuration used for executing Chihaya.
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type Config struct {
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middleware.Config `yaml:",inline"`
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PrometheusAddr string `yaml:"prometheus_addr"`
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HTTPConfig httpfrontend.Config `yaml:"http"`
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UDPConfig udpfrontend.Config `yaml:"udp"`
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Storage storageConfig `yaml:"storage"`
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PreHooks hookConfigs `yaml:"prehooks"`
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PostHooks hookConfigs `yaml:"posthooks"`
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}
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// CreateHooks creates instances of Hooks for all of the PreHooks and PostHooks
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// configured in a Config.
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func (cfg Config) CreateHooks() (preHooks, postHooks []middleware.Hook, err error) {
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for _, hookCfg := range cfg.PreHooks {
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cfgBytes, err := yaml.Marshal(hookCfg.Config)
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if err != nil {
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panic("failed to remarshal valid YAML")
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}
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switch hookCfg.Name {
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case "jwt":
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var jwtCfg jwt.Config
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err := yaml.Unmarshal(cfgBytes, &jwtCfg)
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if err != nil {
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return nil, nil, errors.New("invalid JWT middleware config: " + err.Error())
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}
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hook, err := jwt.NewHook(jwtCfg)
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if err != nil {
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return nil, nil, errors.New("invalid JWT middleware config: " + err.Error())
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}
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preHooks = append(preHooks, hook)
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case "client approval":
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var caCfg clientapproval.Config
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err := yaml.Unmarshal(cfgBytes, &caCfg)
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if err != nil {
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return nil, nil, errors.New("invalid client approval middleware config: " + err.Error())
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}
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hook, err := clientapproval.NewHook(caCfg)
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if err != nil {
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return nil, nil, errors.New("invalid client approval middleware config: " + err.Error())
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}
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preHooks = append(preHooks, hook)
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case "interval variation":
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var viCfg varinterval.Config
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err := yaml.Unmarshal(cfgBytes, &viCfg)
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if err != nil {
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return nil, nil, errors.New("invalid interval variation middleware config: " + err.Error())
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}
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hook, err := varinterval.New(viCfg)
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if err != nil {
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return nil, nil, errors.New("invalid interval variation middleware config: " + err.Error())
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}
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preHooks = append(preHooks, hook)
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}
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}
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for _, hookCfg := range cfg.PostHooks {
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switch hookCfg.Name {
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}
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}
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return
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}
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// ConfigFile represents a namespaced YAML configation file.
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type ConfigFile struct {
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Chihaya Config `yaml:"chihaya"`
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}
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// ParseConfigFile returns a new ConfigFile given the path to a YAML
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// configuration file.
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//
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// It supports relative and absolute paths and environment variables.
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func ParseConfigFile(path string) (*ConfigFile, error) {
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if path == "" {
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return nil, errors.New("no config path specified")
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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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contents, err := ioutil.ReadAll(f)
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if err != nil {
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return nil, err
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}
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var 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, nil
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}
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