server

package
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 Go to latest Published: Sep 16, 2021 License: Apache-2.0 Imports: 38 Imported by: 0

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Index

Constants

View Source 
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"
)
View Source 
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
)
View Source 
const (
	// ReaderBuffsize is used for bufio reader.
	ReaderBuffsize = 1024
	// WriterBuffsize is used for bufio writer.
	WriterBuffsize = 1024
)

Variables

View Source 
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"}
	// HttpConnContextKey is used to store http connection.
	HttpConnContextKey = &contextKey{"http-conn"}
)
View Source 
var ErrNotAccept = errors.New("server refused the connection")
View Source 
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

Functions

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.

Types

type CMuxPlugin 

type CMuxPlugin interface {
	MuxMatch(m cmux.CMux)
}

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://*.domain.com). 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 DownloadFileHandler 

type DownloadFileHandler func(conn net.Conn, args *share.DownloadFileArgs)

DownloadFileHandler handles downloading file. Must close the connection after it finished.

type FileTransfer 

type FileTransfer struct {
	Addr          string
	AdvertiseAddr string
	// contains filtered or unexported fields
}

FileTransfer support transfer files from clients. It registers a file transfer service and listens a on the given port. Clients will invokes this service to get the token and send the token and the file to this port.

func NewFileTransfer 

func NewFileTransfer(addr string, handler FileTransferHandler, downloadFileHandler DownloadFileHandler, waitNum int) *FileTransfer

NewFileTransfer creates a FileTransfer with given parameters.

func (*FileTransfer) Start 

func (s *FileTransfer) Start() error

func (*FileTransfer) Stop 

func (s *FileTransfer) Stop() error

type FileTransferHandler 

type FileTransferHandler func(conn net.Conn, args *share.FileTransferArgs)

FileTransferHandler handles uploading file. Must close the connection after it finished.

type FileTransferService 

type FileTransferService struct {
	FileTransfer *FileTransfer
}

func (*FileTransferService) DownloadFile 

func (s *FileTransferService) DownloadFile(ctx context.Context, args *share.DownloadFileArgs, reply *share.FileTransferReply) error

func (*FileTransferService) TransferFile 

func (s *FileTransferService) TransferFile(ctx context.Context, args *share.FileTransferArgs, reply *share.FileTransferReply) error

type HeartbeatPlugin 

type HeartbeatPlugin interface {
	HeartbeatRequest(ctx context.Context, req *protocol.Message) error
}

HeartbeatPlugin is .

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 WithReadTimeout 

func WithReadTimeout(readTimeout time.Duration) OptionFn

WithReadTimeout sets readTimeout.

func WithTCPKeepAlivePeriod 

func WithTCPKeepAlivePeriod(period time.Duration) OptionFn

WithTCPKeepAlivePeriod sets tcp keepalive period.

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(serviceName, fname 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
	DoPreCall(ctx context.Context, serviceName, methodName string, args interface{}) (interface{}, error)
	DoPostCall(ctx context.Context, serviceName, methodName string, args, reply interface{}) (interface{}, error)

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

	DoHeartbeatRequest(ctx context.Context, req *protocol.Message) error
	MuxMatch(m cmux.CMux)
}

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

type PostCallPlugin 

type PostCallPlugin interface {
	PostCall(ctx context.Context, serviceName, methodName string, args, reply interface{}) (interface{}, error)
}

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 PreCallPlugin 

type PreCallPlugin interface {
	PreCall(ctx context.Context, serviceName, methodName string, args interface{}) (interface{}, error)
}

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) error
}

PreWriteResponsePlugin represents .

type RegisterFunctionPlugin 

type RegisterFunctionPlugin interface {
	RegisterFunction(serviceName, fname 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()
}

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

	HandleServiceError func(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) EnableFileTransfer 

func (s *Server) EnableFileTransfer(serviceName string, fileTransfer *FileTransfer)

EnableFileTransfer supports filetransfer service in this server.

func (*Server) EnableStreamService 

func (s *Server) EnableStreamService(serviceName string, streamService *StreamService)

EnableFileTransfer supports filetransfer service in this server.

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) RegisterOnRestart 

func (s *Server) RegisterOnRestart(f func(s *Server))

RegisterOnRestart registers a function to call on Restart.

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) Restart 

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

Restart restarts this server gracefully. It starts a new rpcx server with the same port with SO_REUSEPORT socket option, and shutdown this rpcx server gracefully.

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: 

ctx.Value(RemoteConnContextKey)

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 connections 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) ServeListener 

func (s *Server) ServeListener(network string, ln net.Listener) (err error)

ServeListener listens RPC requests. It is blocked until receiving connections from clients.

func (*Server) ServeWS 

func (s *Server) ServeWS(conn *websocket.Conn)

func (*Server) SetCORS 

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

SetCORS sets CORS options. for example: 

cors.Options{
	AllowedOrigins:   []string{"foo.com"},
	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 StreamAcceptor 

type StreamAcceptor func(ctx context.Context, args *share.StreamServiceArgs) bool

StreamAcceptor accepts connection from clients or not. You can use it to validate clients and determine if accept or drop the connection.

type StreamHandler 

type StreamHandler func(conn net.Conn, args *share.StreamServiceArgs)

StreamHandler handles a streaming connection with client.

type StreamService 

type StreamService struct {
	Addr          string
	AdvertiseAddr string
	// contains filtered or unexported fields
}

StreamService support streaming between clients and server. It registers a streaming service and listens on the given port. Clients will invokes this service to get the token and send the token and begin to stream.

func NewStreamService 

func NewStreamService(addr string, streamHandler StreamHandler, acceptor StreamAcceptor, waitNum int) *StreamService

NewStreamService creates a stream service.

func (*StreamService) Start 

func (s *StreamService) Start() error

func (*StreamService) Stop 

func (s *StreamService) Stop() error

func (*StreamService) Stream 

func (s *StreamService) Stream(ctx context.Context, args *share.StreamServiceArgs, reply *share.StreamServiceReply) error

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

Source Files

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