rpcserver

Documentation

Overview

Commons for HTTP handling

Index

• Constants
• Variables
• func EventSubscriber(eventSub types.EventSubscriber) func(*wsConnection)
• func GetParam(r *http.Request, param string) string
• func GetParamByteSlice(r *http.Request, param string) ([]byte, error)
• func GetParamFloat64(r *http.Request, param string) (float64, error)
• func GetParamInt32(r *http.Request, param string) (int32, error)
• func GetParamInt64(r *http.Request, param string) (int64, error)
• func GetParamRegexp(r *http.Request, param string, re *regexp.Regexp) (string, error)
• func GetParamUint(r *http.Request, param string) (uint, error)
• func GetParamUint64(r *http.Request, param string) (uint64, error)
• func Listen(addr string, config Config) (listener net.Listener, err error)
• func NewWSConnection(baseConn *websocket.Conn, funcMap map[string]*RPCFunc, cdc *amino.Codec, ...) *wsConnection
• func PingPeriod(pingPeriod time.Duration) func(*wsConnection)
• func ReadWait(readWait time.Duration) func(*wsConnection)
• func RecoverAndLogHandler(handler http.Handler, logger log.Logger) http.Handler
• func RegisterRPCFuncs(mux *http.ServeMux, funcMap map[string]*RPCFunc, cdc *amino.Codec, ...)
• func StartHTTPAndTLSServer(listener net.Listener, handler http.Handler, certFile, keyFile string, ...) error
• func StartHTTPServer(listener net.Listener, handler http.Handler, logger log.Logger) error
• func WriteChanCapacity(cap int) func(*wsConnection)
• func WriteRPCResponseHTTP(w http.ResponseWriter, res types.RPCResponse)
• func WriteRPCResponseHTTPError(w http.ResponseWriter, httpCode int, res types.RPCResponse)
• func WriteWait(writeWait time.Duration) func(*wsConnection)
• type Config
• type RPCFunc
  • func NewRPCFunc(f interface{}, args string) *RPCFunc
  • func NewWSRPCFunc(f interface{}, args string) *RPCFunc
• type ResponseWriterWrapper
  • func (w *ResponseWriterWrapper) Hijack() (net.Conn, *bufio.ReadWriter, error)
  • func (w *ResponseWriterWrapper) WriteHeader(status int)
• type WebsocketManager
  • func NewWebsocketManager(funcMap map[string]*RPCFunc, cdc *amino.Codec, ...) *WebsocketManager
  • func (wm *WebsocketManager) SetLogger(l log.Logger)
  • func (wm *WebsocketManager) WebsocketHandler(w http.ResponseWriter, r *http.Request)

Constants

const (

	// Timeouts for reading/writing to the http connection.
	// Public so handlers can read them -
	// /broadcast_tx_commit has it's own timeout, which should
	// be less than the WriteTimeout here.
	// TODO: use a config instead.
	ReadTimeout  = 3 * time.Second
	WriteTimeout = 20 * time.Second
)

Variables

var (
	RE_INT     = regexp.MustCompile(`^-?[0-9]+$`)
	RE_HEX     = regexp.MustCompile(`^(?i)[a-f0-9]+$`)
	RE_EMAIL   = regexp.MustCompile(`^(?i)(` + dotAtom + `)@(` + dotAtom + `)$`)
	RE_ADDRESS = regexp.MustCompile(`^(?i)[a-z0-9]{25,34}$`)
	RE_HOST    = regexp.MustCompile(`^(?i)(` + domain + `)$`)
)

Functions

func EventSubscriber

func EventSubscriber(eventSub types.EventSubscriber) func(*wsConnection)

EventSubscriber sets object that is used to subscribe / unsubscribe from events - not Goroutine-safe. If none given, default node's eventBus will be used.

func GetParam

func GetParam(r *http.Request, param string) string

func GetParamByteSlice

func GetParamByteSlice(r *http.Request, param string) ([]byte, error)

func GetParamFloat64

func GetParamFloat64(r *http.Request, param string) (float64, error)

func GetParamInt32

func GetParamInt32(r *http.Request, param string) (int32, error)

func GetParamInt64

func GetParamInt64(r *http.Request, param string) (int64, error)

func GetParamRegexp

func GetParamRegexp(r *http.Request, param string, re *regexp.Regexp) (string, error)

func GetParamUint

func GetParamUint(r *http.Request, param string) (uint, error)

func GetParamUint64

func GetParamUint64(r *http.Request, param string) (uint64, error)

func Listen

func Listen(addr string, config Config) (listener net.Listener, err error)

Listen starts a new net.Listener on the given address. It returns an error if the address is invalid or the call to Listen() fails.

func NewWSConnection

func NewWSConnection(
	baseConn *websocket.Conn,
	funcMap map[string]*RPCFunc,
	cdc *amino.Codec,
	options ...func(*wsConnection),
) *wsConnection

NewWSConnection wraps websocket.Conn.

See the commentary on the func(*wsConnection) functions for a detailed description of how to configure ping period and pong wait time. NOTE: if the write buffer is full, pongs may be dropped, which may cause clients to disconnect. see https://github.com/gorilla/websocket/issues/97

func PingPeriod

func PingPeriod(pingPeriod time.Duration) func(*wsConnection)

PingPeriod sets the duration for sending websocket pings. It should only be used in the constructor - not Goroutine-safe.

func ReadWait

func ReadWait(readWait time.Duration) func(*wsConnection)

ReadWait sets the amount of time to wait before a websocket read times out. It should only be used in the constructor - not Goroutine-safe.

func RecoverAndLogHandler

func RecoverAndLogHandler(handler http.Handler, logger log.Logger) http.Handler

Wraps an HTTP handler, adding error logging. If the inner function panics, the outer function recovers, logs, sends an HTTP 500 error response.

func RegisterRPCFuncs

func RegisterRPCFuncs(mux *http.ServeMux, funcMap map[string]*RPCFunc, cdc *amino.Codec, logger log.Logger, middleware func(f func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request))

RegisterRPCFuncs adds a route for each function in the funcMap, as well as general jsonrpc and websocket handlers for all functions. "result" is the interface on which the result objects are registered, and is popualted with every RPCResponse

func StartHTTPAndTLSServer

func StartHTTPAndTLSServer(
	listener net.Listener,
	handler http.Handler,
	certFile, keyFile string,
	logger log.Logger,
) error

StartHTTPAndTLSServer takes a listener and starts an HTTPS server with the given handler. It wraps handler with RecoverAndLogHandler. NOTE: This function blocks - you may want to call it in a go-routine.

func StartHTTPServer

func StartHTTPServer(listener net.Listener, handler http.Handler, logger log.Logger) error

StartHTTPServer takes a listener and starts an HTTP server with the given handler. It wraps handler with RecoverAndLogHandler. NOTE: This function blocks - you may want to call it in a go-routine.

func WriteChanCapacity

func WriteChanCapacity(cap int) func(*wsConnection)

WriteChanCapacity sets the capacity of the websocket write channel. It should only be used in the constructor - not Goroutine-safe.

func WriteRPCResponseHTTP

func WriteRPCResponseHTTP(w http.ResponseWriter, res types.RPCResponse)

func WriteRPCResponseHTTPError

func WriteRPCResponseHTTPError(
	w http.ResponseWriter,
	httpCode int,
	res types.RPCResponse,
)

func WriteWait

func WriteWait(writeWait time.Duration) func(*wsConnection)

WriteWait sets the amount of time to wait before a websocket write times out. It should only be used in the constructor - not Goroutine-safe.

Types

type Config

type Config struct {
	MaxOpenConnections int
}

Config is an RPC server configuration.

type RPCFunc

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

RPCFunc contains the introspected type information for a function

func NewRPCFunc

func NewRPCFunc(f interface{}, args string) *RPCFunc

NewRPCFunc wraps a function for introspection. f is the function, args are comma separated argument names

func NewWSRPCFunc

func NewWSRPCFunc(f interface{}, args string) *RPCFunc

NewWSRPCFunc wraps a function for introspection and use in the websockets.

type ResponseWriterWrapper

type ResponseWriterWrapper struct {
	Status int
	http.ResponseWriter
}

Remember the status for logging

func (*ResponseWriterWrapper) Hijack

func (w *ResponseWriterWrapper) Hijack() (net.Conn, *bufio.ReadWriter, error)

implements http.Hijacker

func (*ResponseWriterWrapper) WriteHeader

func (w *ResponseWriterWrapper) WriteHeader(status int)

type WebsocketManager

type WebsocketManager struct {
	websocket.Upgrader
	// contains filtered or unexported fields
}

WebsocketManager provides a WS handler for incoming connections and passes a map of functions along with any additional params to new connections. NOTE: The websocket path is defined externally, e.g. in node/node.go

func NewWebsocketManager

func NewWebsocketManager(funcMap map[string]*RPCFunc, cdc *amino.Codec, wsConnOptions ...func(*wsConnection)) *WebsocketManager

NewWebsocketManager returns a new WebsocketManager that passes a map of functions, connection options and logger to new WS connections.

func (*WebsocketManager) SetLogger

func (wm *WebsocketManager) SetLogger(l log.Logger)

SetLogger sets the logger.

func (*WebsocketManager) WebsocketHandler

func (wm *WebsocketManager) WebsocketHandler(w http.ResponseWriter, r *http.Request)

WebsocketHandler upgrades the request/response (via http.Hijack) and starts the wsConnection.