/
server.go
579 lines (520 loc) · 21.3 KB
/
server.go
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package cmd
import (
"context"
"fmt"
"net/http"
"net/url"
"os"
"os/signal"
"path"
"strings"
"syscall"
"time"
"github.com/coreos/bbolt"
log "github.com/go-pkgz/lgr"
auth_cache "github.com/patrickmn/go-cache"
"github.com/pkg/errors"
"github.com/go-pkgz/auth"
"github.com/go-pkgz/auth/avatar"
"github.com/go-pkgz/auth/provider"
"github.com/go-pkgz/auth/token"
"github.com/go-pkgz/mongo"
"github.com/go-pkgz/rest/cache"
"github.com/umputun/remark/backend/app/migrator"
"github.com/umputun/remark/backend/app/notify"
"github.com/umputun/remark/backend/app/rest/api"
"github.com/umputun/remark/backend/app/rest/proxy"
"github.com/umputun/remark/backend/app/store"
"github.com/umputun/remark/backend/app/store/admin"
"github.com/umputun/remark/backend/app/store/engine"
"github.com/umputun/remark/backend/app/store/service"
)
// ServerCommand with command line flags and env
type ServerCommand struct {
Store StoreGroup `group:"store" namespace:"store" env-namespace:"STORE"`
Avatar AvatarGroup `group:"avatar" namespace:"avatar" env-namespace:"AVATAR"`
Cache CacheGroup `group:"cache" namespace:"cache" env-namespace:"CACHE"`
Mongo MongoGroup `group:"mongo" namespace:"mongo" env-namespace:"MONGO"`
Admin AdminGroup `group:"admin" namespace:"admin" env-namespace:"ADMIN"`
Notify NotifyGroup `group:"notify" namespace:"notify" env-namespace:"NOTIFY"`
SSL SSLGroup `group:"ssl" namespace:"ssl" env-namespace:"SSL"`
Sites []string `long:"site" env:"SITE" default:"remark" description:"site names" env-delim:","`
AdminPasswd string `long:"admin-passwd" env:"ADMIN_PASSWD" default:"" description:"admin basic auth password"`
BackupLocation string `long:"backup" env:"BACKUP_PATH" default:"./var/backup" description:"backups location"`
MaxBackupFiles int `long:"max-back" env:"MAX_BACKUP_FILES" default:"10" description:"max backups to keep"`
ImageProxy bool `long:"img-proxy" env:"IMG_PROXY" description:"enable image proxy"`
MaxCommentSize int `long:"max-comment" env:"MAX_COMMENT_SIZE" default:"2048" description:"max comment size"`
MaxVotes int `long:"max-votes" env:"MAX_VOTES" default:"-1" description:"maximum number of votes per comment"`
LowScore int `long:"low-score" env:"LOW_SCORE" default:"-5" description:"low score threshold"`
CriticalScore int `long:"critical-score" env:"CRITICAL_SCORE" default:"-10" description:"critical score threshold"`
ReadOnlyAge int `long:"read-age" env:"READONLY_AGE" default:"0" description:"read-only age of comments, days"`
EditDuration time.Duration `long:"edit-time" env:"EDIT_TIME" default:"5m" description:"edit window"`
Port int `long:"port" env:"REMARK_PORT" default:"8080" description:"port"`
WebRoot string `long:"web-root" env:"REMARK_WEB_ROOT" default:"./web" description:"web root directory"`
UpdateLimit float64 `long:"update-limit" env:"UPDATE_LIMIT" default:"0.5" description:"updates/sec limit"`
RestrictedWords []string `long:"restricted-words" env:"RESTRICTED_WORDS" default:"" description:"words prohibited to use in comments" env-delim:","`
Auth struct {
TTL struct {
JWT time.Duration `long:"jwt" env:"JWT" default:"5m" description:"jwt TTL"`
Cookie time.Duration `long:"cookie" env:"COOKIE" default:"200h" description:"auth cookie TTL"`
} `group:"ttl" namespace:"ttl" env-namespace:"TTL"`
Google AuthGroup `group:"google" namespace:"google" env-namespace:"GOOGLE" description:"Google OAuth"`
Github AuthGroup `group:"github" namespace:"github" env-namespace:"GITHUB" description:"Github OAuth"`
Facebook AuthGroup `group:"facebook" namespace:"facebook" env-namespace:"FACEBOOK" description:"Facebook OAuth"`
Yandex AuthGroup `group:"yandex" namespace:"yandex" env-namespace:"YANDEX" description:"Yandex OAuth"`
Dev bool `long:"dev" env:"DEV" description:"enable dev (local) oauth2"`
} `group:"auth" namespace:"auth" env-namespace:"AUTH"`
CommonOpts
}
// AuthGroup defines options group for auth params
type AuthGroup struct {
CID string `long:"cid" env:"CID" description:"OAuth client ID"`
CSEC string `long:"csec" env:"CSEC" description:"OAuth client secret"`
}
// StoreGroup defines options group for store params
type StoreGroup struct {
Type string `long:"type" env:"TYPE" description:"type of storage" choice:"bolt" choice:"mongo" default:"bolt"`
Bolt struct {
Path string `long:"path" env:"PATH" default:"./var" description:"parent dir for bolt files"`
Timeout time.Duration `long:"timeout" env:"TIMEOUT" default:"30s" description:"bolt timeout"`
} `group:"bolt" namespace:"bolt" env-namespace:"BOLT"`
}
// AvatarGroup defines options group for avatar params
type AvatarGroup struct {
Type string `long:"type" env:"TYPE" description:"type of avatar storage" choice:"fs" choice:"bolt" choice:"mongo" default:"fs"`
FS struct {
Path string `long:"path" env:"PATH" default:"./var/avatars" description:"avatars location"`
} `group:"fs" namespace:"fs" env-namespace:"FS"`
Bolt struct {
File string `long:"file" env:"FILE" default:"./var/avatars.db" description:"avatars bolt file location"`
} `group:"bolt" namespace:"bolt" env-namespace:"bolt"`
RszLmt int `long:"rsz-lmt" env:"RESIZE" default:"0" description:"max image size for resizing avatars on save"`
}
// CacheGroup defines options group for cache params
type CacheGroup struct {
Type string `long:"type" env:"TYPE" description:"type of cache" choice:"mem" choice:"mongo" choice:"none" default:"mem"`
Max struct {
Items int `long:"items" env:"ITEMS" default:"1000" description:"max cached items"`
Value int `long:"value" env:"VALUE" default:"65536" description:"max size of cached value"`
Size int64 `long:"size" env:"SIZE" default:"50000000" description:"max size of total cache"`
} `group:"max" namespace:"max" env-namespace:"MAX"`
}
// MongoGroup holds all mongo params, used by store, avatar and cache
type MongoGroup struct {
URL string `long:"url" env:"URL" description:"mongo url"`
DB string `long:"db" env:"DB" default:"remark42" description:"mongo database"`
}
// AdminGroup defines options group for admin params
type AdminGroup struct {
Type string `long:"type" env:"TYPE" description:"type of admin store" choice:"shared" choice:"mongo" default:"shared"`
Shared struct {
Admins []string `long:"id" env:"ID" description:"admin(s) ids" env-delim:","`
Email string `long:"email" env:"EMAIL" default:"" description:"admin email"`
} `group:"shared" namespace:"shared" env-namespace:"SHARED"`
}
// NotifyGroup defines options for notification
type NotifyGroup struct {
Type string `long:"type" env:"TYPE" description:"type of notification" choice:"none" choice:"telegram" default:"none"`
QueueSize int `long:"queue" env:"QUEUE" description:"size of notification queue" default:"100"`
Telegram struct {
Token string `long:"token" env:"TOKEN" description:"telegram token"`
Channel string `long:"chan" env:"CHAN" description:"telegram channel"`
Timeout time.Duration `long:"timeout" env:"TIMEOUT" default:"5s" description:"telegram timeout"`
API string `long:"api" env:"API" default:"https://api.telegram.org/bot" description:"telegram api prefix"`
} `group:"telegram" namespace:"telegram" env-namespace:"TELEGRAM"`
}
// SSLGroup defines options group for server ssl params
type SSLGroup struct {
Type string `long:"type" env:"TYPE" description:"ssl (auto)support" choice:"none" choice:"static" choice:"auto" default:"none"`
Port int `long:"port" env:"PORT" description:"port number for https server" default:"8443"`
Cert string `long:"cert" env:"CERT" description:"path to cert.pem file"`
Key string `long:"key" env:"KEY" description:"path to key.pem file"`
ACMELocation string `long:"acme-location" env:"ACME_LOCATION" description:"dir where certificates will be stored by autocert manager" default:"./var/acme"`
ACMEEmail string `long:"acme-email" env:"ACME_EMAIL" description:"admin email for certificate notifications"`
}
// serverApp holds all active objects
type serverApp struct {
*ServerCommand
restSrv *api.Rest
migratorSrv *api.Migrator
exporter migrator.Exporter
devAuth *provider.DevAuthServer
dataService *service.DataStore
avatarStore avatar.Store
notifyService *notify.Service
terminated chan struct{}
}
// Execute is the entry point for "server" command, called by flag parser
func (s *ServerCommand) Execute(args []string) error {
log.Printf("[INFO] start server on port %d", s.Port)
resetEnv("SECRET", "AUTH_GOOGLE_CSEC", "AUTH_GITHUB_CSEC", "AUTH_FACEBOOK_CSEC", "AUTH_YANDEX_CSEC", "ADMIN_PASSWD")
ctx, cancel := context.WithCancel(context.Background())
go func() { // catch signal and invoke graceful termination
stop := make(chan os.Signal, 1)
signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
<-stop
log.Printf("[WARN] interrupt signal")
cancel()
}()
app, err := s.newServerApp()
if err != nil {
log.Printf("[PANIC] failed to setup application, %+v", err)
}
if err = app.run(ctx); err != nil {
log.Printf("[ERROR] remark terminated with error %+v", err)
return err
}
log.Printf("[INFO] remark terminated")
return nil
}
// newServerApp prepares application and return it with all active parts
// doesn't start anything
func (s *ServerCommand) newServerApp() (*serverApp, error) {
if err := makeDirs(s.BackupLocation); err != nil {
return nil, err
}
if !strings.HasPrefix(s.RemarkURL, "http://") && !strings.HasPrefix(s.RemarkURL, "https://") {
return nil, errors.Errorf("invalid remark42 url %s", s.RemarkURL)
}
log.Printf("[INFO] root url=%s", s.RemarkURL)
storeEngine, err := s.makeDataStore()
if err != nil {
return nil, errors.Wrap(err, "failed to make data store engine")
}
adminStore, err := s.makeAdminStore()
if err != nil {
return nil, errors.Wrap(err, "failed to make admin store")
}
dataService := &service.DataStore{
Interface: storeEngine,
EditDuration: s.EditDuration,
AdminStore: adminStore,
MaxCommentSize: s.MaxCommentSize,
MaxVotes: s.MaxVotes,
TitleExtractor: service.NewTitleExtractor(http.Client{Timeout: time.Second * 5}),
RestrictedWordsMatcher: service.NewRestrictedWordsMatcher(service.StaticRestrictedWordsLister{Words: s.RestrictedWords}),
}
loadingCache, err := s.makeCache()
if err != nil {
return nil, errors.Wrap(err, "failed to make cache")
}
avatarStore, err := s.makeAvatarStore()
if err != nil {
return nil, errors.Wrap(err, "failed to make avatar store")
}
authenticator := s.makeAuthenticator(dataService, avatarStore, adminStore)
exporter := &migrator.Native{DataStore: dataService}
migr := &api.Migrator{
Cache: loadingCache,
NativeImporter: &migrator.Native{DataStore: dataService},
DisqusImporter: &migrator.Disqus{DataStore: dataService},
WordPressImporter: &migrator.WordPress{DataStore: dataService},
NativeExporter: &migrator.Native{DataStore: dataService},
KeyStore: adminStore,
}
notifyService, err := s.makeNotify(dataService)
if err != nil {
log.Printf("[WARN] failed to make notify service, %s", err)
notifyService = notify.NopService // disable notifier
}
imgProxy := &proxy.Image{Enabled: s.ImageProxy, RoutePath: "/api/v1/img", RemarkURL: s.RemarkURL}
commentFormatter := store.NewCommentFormatter(imgProxy)
sslConfig, err := s.makeSSLConfig()
if err != nil {
return nil, errors.Wrap(err, "failed to make config of ssl server params")
}
srv := &api.Rest{
Version: s.Revision,
DataService: dataService,
WebRoot: s.WebRoot,
RemarkURL: s.RemarkURL,
ImageProxy: imgProxy,
CommentFormatter: commentFormatter,
Migrator: migr,
ReadOnlyAge: s.ReadOnlyAge,
SharedSecret: s.SharedSecret,
Authenticator: authenticator,
Cache: loadingCache,
NotifyService: notifyService,
SSLConfig: sslConfig,
UpdateLimiter: s.UpdateLimit,
}
srv.ScoreThresholds.Low, srv.ScoreThresholds.Critical = s.LowScore, s.CriticalScore
var devAuth *provider.DevAuthServer
if s.Auth.Dev {
da, err := authenticator.DevAuth()
if err != nil {
return nil, errors.Wrap(err, "can't make dev oauth2 server")
}
devAuth = da
}
return &serverApp{
ServerCommand: s,
restSrv: srv,
migratorSrv: migr,
exporter: exporter,
devAuth: devAuth,
dataService: dataService,
avatarStore: avatarStore,
notifyService: notifyService,
terminated: make(chan struct{}),
}, nil
}
// Run all application objects
func (a *serverApp) run(ctx context.Context) error {
if a.AdminPasswd != "" {
log.Printf("[WARN] admin basic auth enabled")
}
go func() {
// shutdown on context cancellation
<-ctx.Done()
log.Print("[INFO] shutdown initiated")
a.restSrv.Shutdown()
if a.devAuth != nil {
a.devAuth.Shutdown()
}
if e := a.dataService.Close(); e != nil {
log.Printf("[WARN] failed to close data store, %s", e)
}
if e := a.avatarStore.Close(); e != nil {
log.Printf("[WARN] failed to close avatar store, %s", e)
}
a.notifyService.Close()
log.Print("[INFO] shutdown completed")
}()
a.activateBackup(ctx) // runs in goroutine for each site
if a.Auth.Dev {
go a.devAuth.Run(context.Background()) // dev oauth2 server on :8084
}
a.restSrv.Run(a.Port)
close(a.terminated)
return nil
}
// Wait for application completion (termination)
func (a *serverApp) Wait() {
<-a.terminated
}
// activateBackup runs background backups for each site
func (a *serverApp) activateBackup(ctx context.Context) {
for _, siteID := range a.Sites {
backup := migrator.AutoBackup{
Exporter: a.exporter,
BackupLocation: a.BackupLocation,
SiteID: siteID,
KeepMax: a.MaxBackupFiles,
Duration: 24 * time.Hour,
}
go backup.Do(ctx)
}
}
// makeDataStore creates store for all sites
func (s *ServerCommand) makeDataStore() (result engine.Interface, err error) {
log.Printf("[INFO] make data store, type=%s", s.Store.Type)
switch s.Store.Type {
case "bolt":
if err = makeDirs(s.Store.Bolt.Path); err != nil {
return nil, errors.Wrap(err, "failed to create bolt store")
}
sites := []engine.BoltSite{}
for _, site := range s.Sites {
sites = append(sites, engine.BoltSite{SiteID: site, FileName: fmt.Sprintf("%s/%s.db", s.Store.Bolt.Path, site)})
}
result, err = engine.NewBoltDB(bolt.Options{Timeout: s.Store.Bolt.Timeout}, sites...)
case "mongo":
mgServer, e := s.makeMongo()
if e != nil {
return result, errors.Wrap(e, "failed to create mongo server")
}
conn := mongo.NewConnection(mgServer, s.Mongo.DB, "")
result, err = engine.NewMongo(conn, 500, 100*time.Millisecond)
default:
return nil, errors.Errorf("unsupported store type %s", s.Store.Type)
}
return result, errors.Wrap(err, "can't initialize data store")
}
func (s *ServerCommand) makeAvatarStore() (avatar.Store, error) {
log.Printf("[INFO] make avatar store, type=%s", s.Avatar.Type)
switch s.Avatar.Type {
case "fs":
if err := makeDirs(s.Avatar.FS.Path); err != nil {
return nil, err
}
return avatar.NewLocalFS(s.Avatar.FS.Path), nil
case "mongo":
mgServer, err := s.makeMongo()
if err != nil {
return nil, errors.Wrap(err, "failed to create mongo server")
}
conn := mongo.NewConnection(mgServer, s.Mongo.DB, "")
return avatar.NewGridFS(conn), nil
case "bolt":
if err := makeDirs(path.Dir(s.Avatar.Bolt.File)); err != nil {
return nil, err
}
return avatar.NewBoltDB(s.Avatar.Bolt.File, bolt.Options{})
}
return nil, errors.Errorf("unsupported avatar store type %s", s.Avatar.Type)
}
func (s *ServerCommand) makeAdminStore() (admin.Store, error) {
log.Printf("[INFO] make admin store, type=%s", s.Admin.Type)
switch s.Admin.Type {
case "shared":
if s.Admin.Shared.Email == "" { // no admin email, use admin@domain
if u, err := url.Parse(s.RemarkURL); err == nil {
s.Admin.Shared.Email = "admin@" + u.Host
}
}
return admin.NewStaticStore(s.SharedSecret, s.Admin.Shared.Admins, s.Admin.Shared.Email), nil
case "mongo":
mgServer, e := s.makeMongo()
if e != nil {
return nil, errors.Wrap(e, "failed to create mongo server")
}
conn := mongo.NewConnection(mgServer, s.Mongo.DB, "admin")
return admin.NewMongoStore(conn, s.SharedSecret), nil
default:
return nil, errors.Errorf("unsupported admin store type %s", s.Admin.Type)
}
}
func (s *ServerCommand) makeCache() (cache.LoadingCache, error) {
log.Printf("[INFO] make cache, type=%s", s.Cache.Type)
switch s.Cache.Type {
case "mem":
return cache.NewMemoryCache(cache.MaxCacheSize(s.Cache.Max.Size), cache.MaxValSize(s.Cache.Max.Value),
cache.MaxKeys(s.Cache.Max.Items))
// case "mongo":
// mgServer, err := s.makeMongo()
// if err != nil {
// return nil, errors.Wrap(err, "failed to create mongo server")
// }
// conn := mongo.NewConnection(mgServer, s.Mongo.DB, "cache")
// return cache.NewMongoCache(conn, cache.MaxCacheSize(s.Cache.Max.Size), cache.MaxValSize(s.Cache.Max.Value),
// cache.MaxKeys(s.Cache.Max.Items))
case "none":
return &cache.Nop{}, nil
}
return nil, errors.Errorf("unsupported cache type %s", s.Cache.Type)
}
func (s *ServerCommand) makeMongo() (result *mongo.Server, err error) {
if s.Mongo.URL == "" {
return nil, errors.New("no mongo URL provided")
}
return mongo.NewServerWithURL(s.Mongo.URL, 10*time.Second)
}
func (s *ServerCommand) addAuthProviders(authenticator *auth.Service) {
providers := 0
if s.Auth.Google.CID != "" && s.Auth.Google.CSEC != "" {
authenticator.AddProvider("google", s.Auth.Google.CID, s.Auth.Google.CSEC)
providers++
}
if s.Auth.Github.CID != "" && s.Auth.Github.CSEC != "" {
authenticator.AddProvider("github", s.Auth.Github.CID, s.Auth.Github.CSEC)
providers++
}
if s.Auth.Facebook.CID != "" && s.Auth.Facebook.CSEC != "" {
authenticator.AddProvider("facebook", s.Auth.Facebook.CID, s.Auth.Facebook.CSEC)
providers++
}
if s.Auth.Yandex.CID != "" && s.Auth.Yandex.CSEC != "" {
authenticator.AddProvider("yandex", s.Auth.Yandex.CID, s.Auth.Yandex.CSEC)
providers++
}
if s.Auth.Dev {
authenticator.AddProvider("dev", "", "")
providers++
}
if providers == 0 {
log.Printf("[WARN] no auth providers defined")
}
}
func (s *ServerCommand) makeNotify(dataStore *service.DataStore) (*notify.Service, error) {
log.Printf("[INFO] make notify, type=%s", s.Notify.Type)
switch s.Notify.Type {
case "telegram":
tg, err := notify.NewTelegram(s.Notify.Telegram.Token, s.Notify.Telegram.Channel,
s.Notify.Telegram.Timeout, s.Notify.Telegram.API)
if err != nil {
return nil, errors.Wrap(err, "failed to create telegram notification destination")
}
return notify.NewService(dataStore, s.Notify.QueueSize, tg), nil
case "none":
return notify.NopService, nil
}
return nil, errors.Errorf("unsupported notification type %q", s.Notify.Type)
}
func (s *ServerCommand) makeSSLConfig() (config api.SSLConfig, err error) {
switch s.SSL.Type {
case "none":
config.SSLMode = api.None
case "static":
if s.SSL.Cert == "" {
return config, errors.New("path to cert.pem is required")
}
if s.SSL.Key == "" {
return config, errors.New("path to key.pem is required")
}
config.SSLMode = api.Static
config.Port = s.SSL.Port
config.Cert = s.SSL.Cert
config.Key = s.SSL.Key
case "auto":
config.SSLMode = api.Auto
config.Port = s.SSL.Port
config.ACMELocation = s.SSL.ACMELocation
if s.SSL.ACMEEmail != "" {
config.ACMEEmail = s.SSL.ACMEEmail
} else if s.Admin.Type == "shared" && s.Admin.Shared.Email != "" {
config.ACMEEmail = s.Admin.Shared.Email
} else if u, e := url.Parse(s.RemarkURL); e == nil {
config.ACMEEmail = "admin@" + u.Hostname()
}
}
return config, err
}
func (s *ServerCommand) makeAuthenticator(ds *service.DataStore, avas avatar.Store, admns admin.Store) *auth.Service {
authenticator := auth.NewService(auth.Opts{
URL: strings.TrimSuffix(s.RemarkURL, "/"),
Issuer: "remark42",
TokenDuration: s.Auth.TTL.JWT,
CookieDuration: s.Auth.TTL.Cookie,
SecureCookies: strings.HasPrefix(s.RemarkURL, "https://"),
SecretReader: token.SecretFunc(func() (string, error) { // get secret per site
return admns.Key()
}),
ClaimsUpd: token.ClaimsUpdFunc(func(c token.Claims) token.Claims { // set attributes, on new token or refresh
if c.User == nil {
return c
}
c.User.SetAdmin(ds.IsAdmin(c.Audience, c.User.ID))
c.User.SetBoolAttr("blocked", ds.IsBlocked(c.Audience, c.User.ID))
return c
}),
AdminPasswd: s.AdminPasswd,
Validator: token.ValidatorFunc(func(token string, claims token.Claims) bool { // check on each auth call (in middleware)
if claims.User == nil {
return false
}
return !claims.User.BoolAttr("blocked")
}),
AvatarStore: avas,
AvatarResizeLimit: s.Avatar.RszLmt,
AvatarRoutePath: "/api/v1/avatar",
Logger: log.Default(),
RefreshCache: newAuthRefreshCache(),
})
s.addAuthProviders(authenticator)
return authenticator
}
// authRefreshCache used by authenticator to minimize repeatable token refreshes
type authRefreshCache struct {
*auth_cache.Cache
}
func newAuthRefreshCache() *authRefreshCache {
return &authRefreshCache{Cache: auth_cache.New(5*time.Minute, 10*time.Minute)}
}
func (c *authRefreshCache) Get(key interface{}) (interface{}, bool) {
return c.Cache.Get(key.(string))
}
func (c *authRefreshCache) Set(key, value interface{}) {
c.Cache.Set(key.(string), value, auth_cache.DefaultExpiration)
}