http

type ClientConstructor struct {
	Name          string
	ConfigKey     string
	DefaultConfig HTTPClientConfig
}

type HTTPClientConfig struct {
	// Network level keep-alive duration
	NetworkKeepAlive config.Duration `json:"network_keep_alive" validate:"gte=0s" default:"30s"`
	// Timeout for making network connection
	NetworkTimeout config.Duration `json:"network_timeout" validate:"gte=0s" default:"30s"`
	// HTTP client timeout - Timeouts includes connection time, redirects, reading the response etc. 0 = no timeout.
	Timeout config.Duration `json:"timeout" validate:"gte=0s" default:"60s"`
	// Proxy Connect Header - map[string][]string
	ProxyConnectHeader http.Header `json:"proxy_connect_header,omitempty" validate:"omitempty"`
	// TLS Handshake Timeout. 0 = no timeout
	TLSHandshakeTimeout config.Duration `json:"tls_handshake_timeout" validate:"gte=0s" default:"10s"`
	// Expect Continue Timeout. 0 = no timeout.
	ExpectContinueTimeout config.Duration `json:"expect_continue_timeout" validate:"gte=0s" default:"1s"`
	// Response Header Timeout. 0 = no timeout.
	ResponseHeaderTimeout config.Duration `json:"response_header_timeout" validate:"gte=0s" default:"0s"`
	// Idle Connection Timeout. 0 = no timeout.
	IdleConnTimeout config.Duration `json:"idle_connection_timeout" validate:"gte=0s" default:"90s"`
	// SSL key log file (useful for debugging with wireshark)
	KeyLogWriter string `json:"key_log_file"`
	// Client TLS configuration
	ClientTLSConfig tlsconfig.ClientTLSConfig `json:"tls"`
	// Max Idle Connections per host. 0 = no limit.
	MaxIdleConnsPerHost int `json:"max_idle_connections_per_host" validate:"gte=0" default:"5"`
	// Max Idle Connections. 0 = no limit.
	MaxIdleConns int `json:"max_idle_connections" validate:"gte=0" default:"100"`
	// Max Connections Per Host. 0 = no limit.
	MaxConnsPerHost int `json:"max_conns_per_host" validate:"gte=0" default:"0"`
	// Max Response Header Bytes. 0 = no limit.
	MaxResponseHeaderBytes int64 `json:"max_response_header_bytes" validate:"gte=0" default:"0"`
	// Write Buffer Size. 0 = 4KB.
	WriteBufferSize int `json:"write_buffer_size" validate:"gte=0" default:"0"`
	// Read Buffer Size. 0 = 4KB
	ReadBufferSize int `json:"read_buffer_size" validate:"gte=0" default:"0"`
	// Disable Compression
	DisableCompression bool `json:"disable_compression" default:"false"`
	// Use Proxy
	UseProxy bool `json:"use_proxy" default:"false"`
	// Disable HTTP Keep Alives
	DisableKeepAlives bool `json:"disable_keep_alives" default:"false"`
}

type HTTPServerConfig struct {
	// Idle timeout
	IdleTimeout config.Duration `json:"idle_timeout" validate:"gte=0s" default:"30s"`
	// Read header timeout
	ReadHeaderTimeout config.Duration `json:"read_header_timeout" validate:"gte=0s" default:"10s"`
	// Read timeout
	ReadTimeout config.Duration `json:"read_timeout" validate:"gte=0s" default:"10s"`
	// Write timeout
	WriteTimeout config.Duration `json:"write_timeout" validate:"gte=0s" default:"45s"`
	// Max header size in bytes
	MaxHeaderBytes int `json:"max_header_bytes" validate:"gte=0" default:"1048576"`
	// Buckets specification in latency histogram
	LatencyBucketsMS []float64 `json:"latency_buckets_ms" validate:"gte=0" default:"[10.0,25.0,100.0,250.0,1000.0]"`
	// Disable HTTP Keep Alives
	DisableHTTPKeepAlives bool `json:"disable_http_keep_alives" default:"false"`
}

type Middleware func(next http.RoundTripper) http.RoundTripper

type MiddlewareChain struct {
	// contains filtered or unexported fields
}

type ProxyConfig struct {
	HTTPProxy string `json:"http" validate:"omitempty,url|hostname_port"`

	HTTPSProxy string `json:"https" validate:"omitempty,url|hostname_port"`

	NoProxy []string `json:"no_proxy,omitempty" validate:"omitempty,dive,ip|cidr|fqdn|hostname_port"`
}

type ProxyConstructor struct {
	ConfigKey     string
	DefaultConfig ProxyConfig
}

type RoundTripperFunc func(*http.Request) (*http.Response, error)

type Server struct {
	Server    *http.Server
	Mux       *mux.Router
	Listener  *listener.Listener
	TLSConfig *tls.Config
	// As we are using Gorilla Mux, root handler is registered the last as a catch all
	RootHandler     http.Handler
	RequestCounters *prometheus.CounterVec
	ErrorCounters   *prometheus.CounterVec
	Latencies       *prometheus.HistogramVec
}

type ServerConstructor struct {
	// Name of http server instance -- empty for main server
	Name string
	// Name of listener instance
	ListenerName string
	// Name of tls config instance
	TLSConfigName string
	// Viper config key/server name
	ConfigKey string
	// Default Server Config
	DefaultConfig HTTPServerConfig
}