package server import ( "time" ) // Defines default config settings const ( DefaultListenHTTP = ":80" DefaultCacheDuration = 12 * time.Hour DefaultKeepaliveInterval = 55 * time.Second // Not too frequently to save battery (Android read timeout is 77s!) DefaultManagerInterval = time.Minute DefaultAtSenderInterval = 10 * time.Second DefaultMinDelay = 10 * time.Second DefaultMaxDelay = 3 * 24 * time.Hour DefaultMessageLimit = 4096 DefaultAttachmentSizeLimit = 5 * 1024 * 1024 DefaultAttachmentExpiryDuration = 3 * time.Hour DefaultFirebaseKeepaliveInterval = 3 * time.Hour // Not too frequently to save battery ) // Defines all the limits // - total topic limit: max number of topics overall // - per visitor subscription limit: max number of subscriptions (active HTTP connections) per per-visitor/IP // - per visitor request limit: max number of PUT/GET/.. requests (here: 60 requests bucket, replenished at a rate of one per 10 seconds) // - per visitor email limit: max number of emails (here: 16 email bucket, replenished at a rate of one per hour) // - per visitor attachment size limit: const ( DefaultTotalTopicLimit = 5000 DefaultVisitorSubscriptionLimit = 30 DefaultVisitorRequestLimitBurst = 60 DefaultVisitorRequestLimitReplenish = 10 * time.Second DefaultVisitorEmailLimitBurst = 16 DefaultVisitorEmailLimitReplenish = time.Hour DefaultVisitorAttachmentBytesLimitBurst = 50 * 1024 * 1024 DefaultVisitorAttachmentBytesLimitReplenish = time.Hour ) // Config is the main config struct for the application. Use New to instantiate a default config struct. type Config struct { BaseURL string ListenHTTP string ListenHTTPS string KeyFile string CertFile string FirebaseKeyFile string CacheFile string CacheDuration time.Duration AttachmentCacheDir string AttachmentSizeLimit int64 AttachmentExpiryDuration time.Duration KeepaliveInterval time.Duration ManagerInterval time.Duration AtSenderInterval time.Duration FirebaseKeepaliveInterval time.Duration SMTPSenderAddr string SMTPSenderUser string SMTPSenderPass string SMTPSenderFrom string SMTPServerListen string SMTPServerDomain string SMTPServerAddrPrefix string MessageLimit int MinDelay time.Duration MaxDelay time.Duration TotalTopicLimit int TotalAttachmentSizeLimit int64 VisitorSubscriptionLimit int VisitorRequestLimitBurst int VisitorRequestLimitReplenish time.Duration VisitorEmailLimitBurst int VisitorEmailLimitReplenish time.Duration VisitorAttachmentBytesLimitBurst int64 VisitorAttachmentBytesLimitReplenish time.Duration BehindProxy bool } // NewConfig instantiates a default new server config func NewConfig() *Config { return &Config{ BaseURL: "", ListenHTTP: DefaultListenHTTP, ListenHTTPS: "", KeyFile: "", CertFile: "", FirebaseKeyFile: "", CacheFile: "", CacheDuration: DefaultCacheDuration, AttachmentCacheDir: "", AttachmentSizeLimit: DefaultAttachmentSizeLimit, AttachmentExpiryDuration: DefaultAttachmentExpiryDuration, KeepaliveInterval: DefaultKeepaliveInterval, ManagerInterval: DefaultManagerInterval, MessageLimit: DefaultMessageLimit, MinDelay: DefaultMinDelay, MaxDelay: DefaultMaxDelay, AtSenderInterval: DefaultAtSenderInterval, FirebaseKeepaliveInterval: DefaultFirebaseKeepaliveInterval, TotalTopicLimit: DefaultTotalTopicLimit, VisitorSubscriptionLimit: DefaultVisitorSubscriptionLimit, VisitorRequestLimitBurst: DefaultVisitorRequestLimitBurst, VisitorRequestLimitReplenish: DefaultVisitorRequestLimitReplenish, VisitorEmailLimitBurst: DefaultVisitorEmailLimitBurst, VisitorEmailLimitReplenish: DefaultVisitorEmailLimitReplenish, VisitorAttachmentBytesLimitBurst: DefaultVisitorAttachmentBytesLimitBurst, VisitorAttachmentBytesLimitReplenish: DefaultVisitorAttachmentBytesLimitReplenish, BehindProxy: false, } }