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Published: Aug 29, 2019 License: Apache-2.0 Imports: 36 Imported by: 0




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const (
	XVersion           = "X-RPCX-Version"
	XMessageType       = "X-RPCX-MesssageType"
	XHeartbeat         = "X-RPCX-Heartbeat"
	XOneway            = "X-RPCX-Oneway"
	XMessageStatusType = "X-RPCX-MessageStatusType"
	XSerializeType     = "X-RPCX-SerializeType"
	XMessageID         = "X-RPCX-MessageID"
	XServicePath       = "X-RPCX-ServicePath"
	XServiceMethod     = "X-RPCX-ServiceMethod"
	XMeta              = "X-RPCX-Meta"
	XErrorMessage      = "X-RPCX-ErrorMessage"
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const (
	// CodeUnknownJSONRPCError should be used for all non coded errors.
	CodeUnknownJSONRPCError = -32001
	// CodeParseJSONRPCError is used when invalid JSON was received by the server.
	CodeParseJSONRPCError = -32700
	//CodeInvalidjsonrpcRequest is used when the JSON sent is not a valid jsonrpcRequest object.
	CodeInvalidjsonrpcRequest = -32600
	// CodeMethodNotFound should be returned by the handler when the method does
	// not exist / is not available.
	CodeMethodNotFound = -32601
	// CodeInvalidParams should be returned by the handler when method
	// parameter(s) were invalid.
	CodeInvalidParams = -32602
	// CodeInternalJSONRPCError is not currently returned but defined for completeness.
	CodeInternalJSONRPCError = -32603
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const (
	// ReaderBuffsize is used for bufio reader.
	ReaderBuffsize = 1024
	// WriterBuffsize is used for bufio writer.
	WriterBuffsize = 1024


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var (
	// RemoteConnContextKey is a context key. It can be used in
	// services with context.WithValue to access the connection arrived on.
	// The associated value will be of type net.Conn.
	RemoteConnContextKey = &contextKey{"remote-conn"}
	// StartRequestContextKey records the start time
	StartRequestContextKey = &contextKey{"start-parse-request"}
	// StartSendRequestContextKey records the start time
	StartSendRequestContextKey = &contextKey{"start-send-request"}
	// TagContextKey is used to record extra info in handling services. Its value is a map[string]interface{}
	TagContextKey = &contextKey{"service-tag"}
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var ErrServerClosed = errors.New("http: Server closed")

ErrServerClosed is returned by the Server's Serve, ListenAndServe after a call to Shutdown or Close.

View Source
var UsePool bool


func HTTPRequest2RpcxRequest

func HTTPRequest2RpcxRequest(r *http.Request) (*protocol.Message, error)

HTTPRequest2RpcxRequest converts a http request to a rpcx request.

func RegisterMakeListener

func RegisterMakeListener(network string, ml MakeListener)

RegisterMakeListener registers a MakeListener for network.


type CORSOptions

type CORSOptions struct {
	// AllowedOrigins is a list of origins a cross-domain request can be executed from.
	// If the special "*" value is present in the list, all origins will be allowed.
	// An origin may contain a wildcard (*) to replace 0 or more characters
	// (i.e.: http://* Usage of wildcards implies a small performance penalty.
	// Only one wildcard can be used per origin.
	// Default value is ["*"]
	AllowedOrigins []string
	// AllowOriginFunc is a custom function to validate the origin. It take the origin
	// as argument and returns true if allowed or false otherwise. If this option is
	// set, the content of AllowedOrigins is ignored.
	AllowOriginFunc func(origin string) bool
	// AllowOriginFunc is a custom function to validate the origin. It takes the HTTP Request object and the origin as
	// argument and returns true if allowed or false otherwise. If this option is set, the content of `AllowedOrigins`
	// and `AllowOriginFunc` is ignored.
	AllowOriginRequestFunc func(r *http.Request, origin string) bool
	// AllowedMethods is a list of methods the client is allowed to use with
	// cross-domain requests. Default value is simple methods (HEAD, GET and POST).
	AllowedMethods []string
	// AllowedHeaders is list of non simple headers the client is allowed to use with
	// cross-domain requests.
	// If the special "*" value is present in the list, all headers will be allowed.
	// Default value is [] but "Origin" is always appended to the list.
	AllowedHeaders []string
	// ExposedHeaders indicates which headers are safe to expose to the API of a CORS
	// API specification
	ExposedHeaders []string
	// MaxAge indicates how long (in seconds) the results of a preflight request
	// can be cached
	MaxAge int
	// AllowCredentials indicates whether the request can include user credentials like
	// cookies, HTTP authentication or client side SSL certificates.
	AllowCredentials bool
	// OptionsPassthrough instructs preflight to let other potential next handlers to
	// process the OPTIONS method. Turn this on if your application handles OPTIONS.
	OptionsPassthrough bool
	// Debugging flag adds additional output to debug server side CORS issues
	Debug bool

func AllowAllCORSOptions

func AllowAllCORSOptions() *CORSOptions

AllowAllCORSOptions returns a option that allows access.

type ID

type ID struct {
	Name   string
	Number int64

ID is a jsonrpcRequest identifier. Only one of either the Name or Number members will be set, using the number form if the Name is the empty string.

func (*ID) MarshalJSON

func (id *ID) MarshalJSON() ([]byte, error)

func (*ID) String

func (id *ID) String() string

String returns a string representation of the ID. The representation is non ambiguous, string forms are quoted, number forms are preceded by a #

func (*ID) UnmarshalJSON

func (id *ID) UnmarshalJSON(data []byte) error

type JSONRPCError

type JSONRPCError struct {
	// Code is an error code indicating the type of failure.
	Code int64 `json:"code"`
	// Message is a short description of the error.
	Message string `json:"message"`
	// Data is optional structured data containing additional information about the error.
	Data *json.RawMessage `json:"data"`

JSONRPCError represents a structured error in a jsonrpcRespone.

func (*JSONRPCError) JSONRPCError

func (err *JSONRPCError) JSONRPCError() string

type MakeListener

type MakeListener func(s *Server, address string) (ln net.Listener, err error)

MakeListener defines a listener generater.

type OptionFn

type OptionFn func(*Server)

OptionFn configures options of server.

func WithBlockCrypt

func WithBlockCrypt(bc kcp.BlockCrypt) OptionFn

WithBlockCrypt sets kcp.BlockCrypt.

func WithReadTimeout

func WithReadTimeout(readTimeout time.Duration) OptionFn

WithReadTimeout sets readTimeout.

func WithTLSConfig

func WithTLSConfig(cfg *tls.Config) OptionFn

WithTLSConfig sets tls.Config.

func WithWriteTimeout

func WithWriteTimeout(writeTimeout time.Duration) OptionFn

WithWriteTimeout sets writeTimeout.

type Plugin

type Plugin interface {

Plugin is the server plugin interface.

type PluginContainer

type PluginContainer interface {
	Add(plugin Plugin)
	Remove(plugin Plugin)
	All() []Plugin

	DoRegister(name string, rcvr interface{}, metadata string) error
	DoRegisterFunction(name string, fn interface{}, metadata string) error
	DoUnregister(name string) error

	DoPostConnAccept(net.Conn) (net.Conn, bool)
	DoPostConnClose(net.Conn) bool

	DoPreReadRequest(ctx context.Context) error
	DoPostReadRequest(ctx context.Context, r *protocol.Message, e error) error

	DoPreHandleRequest(ctx context.Context, req *protocol.Message) error

	DoPreWriteResponse(context.Context, *protocol.Message, *protocol.Message) error
	DoPostWriteResponse(context.Context, *protocol.Message, *protocol.Message, error) error

	DoPreWriteRequest(ctx context.Context) error
	DoPostWriteRequest(ctx context.Context, r *protocol.Message, e error) error

PluginContainer represents a plugin container that defines all methods to manage plugins. And it also defines all extension points.

type PostConnAcceptPlugin

type PostConnAcceptPlugin interface {
	HandleConnAccept(net.Conn) (net.Conn, bool)

PostConnAcceptPlugin represents connection accept plugin. if returns false, it means subsequent IPostConnAcceptPlugins should not contiune to handle this conn and this conn has been closed.

type PostConnClosePlugin

type PostConnClosePlugin interface {
	HandleConnClose(net.Conn) bool

PostConnClosePlugin represents client connection close plugin.

type PostReadRequestPlugin

type PostReadRequestPlugin interface {
	PostReadRequest(ctx context.Context, r *protocol.Message, e error) error

PostReadRequestPlugin represents .

type PostWriteRequestPlugin

type PostWriteRequestPlugin interface {
	PostWriteRequest(ctx context.Context, r *protocol.Message, e error) error

PostWriteRequestPlugin represents .

type PostWriteResponsePlugin

type PostWriteResponsePlugin interface {
	PostWriteResponse(context.Context, *protocol.Message, *protocol.Message, error) error

PostWriteResponsePlugin represents .

type PreHandleRequestPlugin

type PreHandleRequestPlugin interface {
	PreHandleRequest(ctx context.Context, r *protocol.Message) error

PreHandleRequestPlugin represents .

type PreReadRequestPlugin

type PreReadRequestPlugin interface {
	PreReadRequest(ctx context.Context) error

PreReadRequestPlugin represents .

type PreWriteRequestPlugin

type PreWriteRequestPlugin interface {
	PreWriteRequest(ctx context.Context) error

PreWriteRequestPlugin represents .

type PreWriteResponsePlugin

type PreWriteResponsePlugin interface {
	PreWriteResponse(context.Context, *protocol.Message, *protocol.Message) error

PreWriteResponsePlugin represents .

type RegisterFunctionPlugin

type RegisterFunctionPlugin interface {
	RegisterFunction(name string, fn interface{}, metadata string) error

RegisterFunctionPlugin is .

type RegisterPlugin

type RegisterPlugin interface {
	Register(name string, rcvr interface{}, metadata string) error
	Unregister(name string) error

RegisterPlugin is .

type Reset

type Reset interface {

Reset defines Reset method for pooled object.

type Server

type Server struct {
	DisableHTTPGateway bool // should disable http invoke or not.
	DisableJSONRPC     bool // should disable json rpc or not.

	Plugins PluginContainer

	// AuthFunc can be used to auth.
	AuthFunc func(ctx context.Context, req *protocol.Message, token string) error
	// contains filtered or unexported fields

Server is rpcx server that use TCP or UDP.

func NewServer

func NewServer(options ...OptionFn) *Server

NewServer returns a server.

func (*Server) ActiveClientConn

func (s *Server) ActiveClientConn() []net.Conn

ActiveClientConn returns active connections.

func (*Server) Address

func (s *Server) Address() net.Addr

Address returns listened address.

func (*Server) Close

func (s *Server) Close() error

Close immediately closes all active net.Listeners.

func (*Server) Register

func (s *Server) Register(rcvr interface{}, metadata string) error

Register publishes in the server the set of methods of the receiver value that satisfy the following conditions:

  • exported method of exported type
  • three arguments, the first is of context.Context, both of exported type for three arguments
  • the third argument is a pointer
  • one return value, of type error

It returns an error if the receiver is not an exported type or has no suitable methods. It also logs the error. The client accesses each method using a string of the form "Type.Method", where Type is the receiver's concrete type.

func (*Server) RegisterFunction

func (s *Server) RegisterFunction(servicePath string, fn interface{}, metadata string) error

RegisterFunction publishes a function that satisfy the following conditions:

  • three arguments, the first is of context.Context, both of exported type for three arguments
  • the third argument is a pointer
  • one return value, of type error

The client accesses function using a string of the form "servicePath.Method".

func (*Server) RegisterFunctionName

func (s *Server) RegisterFunctionName(servicePath string, name string, fn interface{}, metadata string) error

RegisterFunctionName is like RegisterFunction but uses the provided name for the function instead of the function's concrete type.

func (*Server) RegisterName

func (s *Server) RegisterName(name string, rcvr interface{}, metadata string) error

RegisterName is like Register but uses the provided name for the type instead of the receiver's concrete type.

func (*Server) RegisterOnShutdown

func (s *Server) RegisterOnShutdown(f func(s *Server))

RegisterOnShutdown registers a function to call on Shutdown. This can be used to gracefully shutdown connections.

func (*Server) SendMessage

func (s *Server) SendMessage(conn net.Conn, servicePath, serviceMethod string, metadata map[string]string, data []byte) error

SendMessage a request to the specified client. The client is designated by the conn. conn can be gotten from context in services:


servicePath, serviceMethod, metadata can be set to zero values.

func (*Server) Serve

func (s *Server) Serve(network, address string) (err error)

Serve starts and listens RPC requests. It is blocked until receiving connectings from clients.

func (*Server) ServeHTTP

func (s *Server) ServeHTTP(w http.ResponseWriter, req *http.Request)

ServeHTTP implements an http.Handler that answers RPC requests.

func (*Server) SetCORS

func (s *Server) SetCORS(options *CORSOptions)

SetCORS sets CORS options. for example:

	AllowedOrigins:   []string{""},
	AllowedMethods:   []string{http.MethodGet, http.MethodPost, http.MethodDelete},
	AllowCredentials: true,

func (*Server) Shutdown

func (s *Server) Shutdown(ctx context.Context) error

Shutdown gracefully shuts down the server without interrupting any active connections. Shutdown works by first closing the listener, then closing all idle connections, and then waiting indefinitely for connections to return to idle and then shut down. If the provided context expires before the shutdown is complete, Shutdown returns the context's error, otherwise it returns any error returned from closing the Server's underlying Listener.

func (*Server) UnregisterAll

func (s *Server) UnregisterAll() error

UnregisterAll unregisters all services. You can call this method when you want to shutdown/upgrade this node.

type VersionTag

type VersionTag struct{}

VersionTag is a special 0 sized struct that encodes as the jsonrpc version tag. It will fail during decode if it is not the correct version tag in the stream.

func (VersionTag) MarshalJSON

func (VersionTag) MarshalJSON() ([]byte, error)

func (VersionTag) UnmarshalJSON

func (VersionTag) UnmarshalJSON(data []byte) error

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