How to use Close method of rpctype Package

Best Syzkaller code snippet using rpctype.Close

rpc.go

Source:rpc.go Github

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...54 if err != nil {55 r.sendError(conn, fmt.Sprintf("dial leader: %v", err))56 return57 }58 defer leaderConn.Close()59 leaderConn.Write([]byte{MuxRPCHeader})60 // re-write the original message to the leader61 leaderConn.Write(buf)62 if err := proxy(leaderConn.(*net.TCPConn), conn); err != nil {63 r.sendError(conn, fmt.Sprintf("leader proxy error: %v", err))64 }65}66// handleRPCConn reads a command from the connection and executes it.67func (r *rpc) handleRPCConn(conn net.Conn) {68 defer conn.Close()69 // RPC connections should execute on the leader. If we are not the leader,70 // proxy the connection to the leader so that clients an connect to any node71 // in the cluster.72 r.traceCluster("rpc connection from: %v", conn.RemoteAddr())73 // Read and execute request.74 typ, buf, err := r.readMessage(conn)75 // Handle unexpected RPC errors76 if err != nil {77 r.sendError(conn, err.Error())78 return79 }80 if !r.store.IsLeader() && typ != internal.RPCType_PromoteRaft {81 r.proxyLeader(conn.(*net.TCPConn), pack(typ, buf))82 return83 }84 typ, resp, err := r.executeMessage(conn, typ, buf)85 // Handle unexpected RPC errors86 if err != nil {87 r.sendError(conn, err.Error())88 return89 }90 // Set the status header and error message91 if reply, ok := resp.(Reply); ok {92 reply.GetHeader().OK = proto.Bool(err == nil)93 if err != nil {94 reply.GetHeader().Error = proto.String(err.Error())95 }96 }97 r.sendResponse(conn, typ, resp)98}99func (r *rpc) readMessage(conn net.Conn) (internal.RPCType, []byte, error) {100 // Read request size.101 var sz uint64102 if err := binary.Read(conn, binary.BigEndian, &sz); err != nil {103 return internal.RPCType_Error, nil, fmt.Errorf("read size: %s", err)104 }105 if sz == 0 {106 return internal.RPCType_Error, nil, fmt.Errorf("invalid message size: %d", sz)107 }108 if sz >= MaxMessageSize {109 return internal.RPCType_Error, nil, fmt.Errorf("max message size of %d exceeded: %d", MaxMessageSize, sz)110 }111 // Read request.112 buf := make([]byte, sz)113 if _, err := io.ReadFull(conn, buf); err != nil {114 return internal.RPCType_Error, nil, fmt.Errorf("read request: %s", err)115 }116 // Determine the RPC type117 rpcType := internal.RPCType(btou64(buf[0:8]))118 buf = buf[8:]119 r.traceCluster("recv %v request on: %v", rpcType, conn.RemoteAddr())120 return rpcType, buf, nil121}122func (r *rpc) executeMessage(conn net.Conn, rpcType internal.RPCType, buf []byte) (internal.RPCType, proto.Message, error) {123 switch rpcType {124 case internal.RPCType_FetchData:125 var req internal.FetchDataRequest126 if err := proto.Unmarshal(buf, &req); err != nil {127 return internal.RPCType_Error, nil, fmt.Errorf("fetch request unmarshal: %v", err)128 }129 resp, err := r.handleFetchData(&req)130 return rpcType, resp, err131 case internal.RPCType_Join:132 var req internal.JoinRequest133 if err := proto.Unmarshal(buf, &req); err != nil {134 return internal.RPCType_Error, nil, fmt.Errorf("join request unmarshal: %v", err)135 }136 resp, err := r.handleJoinRequest(&req)137 return rpcType, resp, err138 case internal.RPCType_PromoteRaft:139 var req internal.PromoteRaftRequest140 if err := proto.Unmarshal(buf, &req); err != nil {141 return internal.RPCType_Error, nil, fmt.Errorf("promote to raft request unmarshal: %v", err)142 }143 resp, err := r.handlePromoteRaftRequest(&req)144 return rpcType, resp, err145 default:146 return internal.RPCType_Error, nil, fmt.Errorf("unknown rpc type:%v", rpcType)147 }148}149func (r *rpc) sendResponse(conn net.Conn, typ internal.RPCType, resp proto.Message) {150 // Marshal the response back to a protobuf151 buf, err := proto.Marshal(resp)152 if err != nil {153 r.logger.Printf("unable to marshal response: %v", err)154 return155 }156 // Encode response back to connection.157 if _, err := conn.Write(pack(typ, buf)); err != nil {158 r.logger.Printf("unable to write rpc response: %s", err)159 }160}161func (r *rpc) sendError(conn net.Conn, msg string) {162 r.traceCluster(msg)163 resp := &internal.ErrorResponse{164 Header: &internal.ResponseHeader{165 OK: proto.Bool(false),166 Error: proto.String(msg),167 },168 }169 r.sendResponse(conn, internal.RPCType_Error, resp)170}171// handleFetchData handles a request for the current nodes meta data172func (r *rpc) handleFetchData(req *internal.FetchDataRequest) (*internal.FetchDataResponse, error) {173 var (174 b []byte175 data *Data176 err error177 )178 for {179 data = r.store.cachedData()180 if data.Index != req.GetIndex() {181 b, err = data.MarshalBinary()182 if err != nil {183 return nil, err184 }185 break186 }187 if !req.GetBlocking() {188 break189 }190 if err := r.store.WaitForDataChanged(); err != nil {191 return nil, err192 }193 }194 return &internal.FetchDataResponse{195 Header: &internal.ResponseHeader{196 OK: proto.Bool(true),197 },198 Index: proto.Uint64(data.Index),199 Term: proto.Uint64(data.Term),200 Data: b}, nil201}202// handleJoinRequest handles a request to join the cluster203func (r *rpc) handleJoinRequest(req *internal.JoinRequest) (*internal.JoinResponse, error) {204 r.traceCluster("join request from: %v", *req.Addr)205 node, err := func() (*NodeInfo, error) {206 // attempt to create the node207 node, err := r.store.CreateNode(*req.Addr)208 // if it exists, return the existing node209 if err == ErrNodeExists {210 node, err = r.store.NodeByHost(*req.Addr)211 if err != nil {212 return node, err213 }214 r.logger.Printf("existing node re-joined: id=%v addr=%v", node.ID, node.Host)215 } else if err != nil {216 return nil, fmt.Errorf("create node: %v", err)217 }218 peers, err := r.store.Peers()219 if err != nil {220 return nil, fmt.Errorf("list peers: %v", err)221 }222 // If we have less than 3 nodes, add them as raft peers if they are not223 // already a peer224 if len(peers) < MaxRaftNodes && !raft.PeerContained(peers, *req.Addr) {225 r.logger.Printf("adding new raft peer: nodeId=%v addr=%v", node.ID, *req.Addr)226 if err = r.store.AddPeer(*req.Addr); err != nil {227 return node, fmt.Errorf("add peer: %v", err)228 }229 }230 return node, err231 }()232 nodeID := uint64(0)233 if node != nil {234 nodeID = node.ID235 }236 if err != nil {237 return nil, err238 }239 // get the current raft peers240 peers, err := r.store.Peers()241 if err != nil {242 return nil, fmt.Errorf("list peers: %v", err)243 }244 return &internal.JoinResponse{245 Header: &internal.ResponseHeader{246 OK: proto.Bool(true),247 },248 EnableRaft: proto.Bool(raft.PeerContained(peers, *req.Addr)),249 RaftNodes: peers,250 NodeID: proto.Uint64(nodeID),251 }, err252}253func (r *rpc) handlePromoteRaftRequest(req *internal.PromoteRaftRequest) (*internal.PromoteRaftResponse, error) {254 r.traceCluster("promote raft request from: %v", *req.Addr)255 // Need to set the local store peers to match what we are about to join256 if err := r.store.SetPeers(req.RaftNodes); err != nil {257 return nil, err258 }259 if err := r.store.enableLocalRaft(); err != nil {260 return nil, err261 }262 if !contains(req.RaftNodes, *req.Addr) {263 req.RaftNodes = append(req.RaftNodes, *req.Addr)264 }265 if err := r.store.SetPeers(req.RaftNodes); err != nil {266 return nil, err267 }268 return &internal.PromoteRaftResponse{269 Header: &internal.ResponseHeader{270 OK: proto.Bool(true),271 },272 Success: proto.Bool(true),273 }, nil274}275// pack returns a TLV style byte slice encoding the size of the payload, the RPC type276// and the RPC data277func pack(typ internal.RPCType, b []byte) []byte {278 buf := u64tob(uint64(len(b)) + 8)279 buf = append(buf, u64tob(uint64(typ))...)280 buf = append(buf, b...)281 return buf282}283// fetchMetaData returns the latest copy of the meta store data from the current284// leader.285func (r *rpc) fetchMetaData(blocking bool) (*Data, error) {286 assert(r.store != nil, "store is nil")287 // Retrieve the current known leader.288 leader := r.store.Leader()289 if leader == "" {290 return nil, errors.New("no leader detected during fetchMetaData")291 }292 var index, term uint64293 data := r.store.cachedData()294 if data != nil {295 index = data.Index296 term = data.Index297 }298 resp, err := r.call(leader, &internal.FetchDataRequest{299 Index: proto.Uint64(index),300 Term: proto.Uint64(term),301 Blocking: proto.Bool(blocking),302 })303 if err != nil {304 return nil, err305 }306 switch t := resp.(type) {307 case *internal.FetchDataResponse:308 // If data is nil, then the term and index we sent matches the leader309 if t.GetData() == nil {310 return nil, nil311 }312 ms := &Data{}313 if err := ms.UnmarshalBinary(t.GetData()); err != nil {314 return nil, fmt.Errorf("rpc unmarshal metadata: %v", err)315 }316 return ms, nil317 case *internal.ErrorResponse:318 return nil, fmt.Errorf("rpc failed: %s", t.GetHeader().GetError())319 default:320 return nil, fmt.Errorf("rpc failed: unknown response type: %v", t.String())321 }322}323// join attempts to join a cluster at remoteAddr using localAddr as the current324// node's cluster address325func (r *rpc) join(localAddr, remoteAddr string) (*JoinResult, error) {326 req := &internal.JoinRequest{327 Addr: proto.String(localAddr),328 }329 resp, err := r.call(remoteAddr, req)330 if err != nil {331 return nil, err332 }333 switch t := resp.(type) {334 case *internal.JoinResponse:335 return &JoinResult{336 RaftEnabled: t.GetEnableRaft(),337 RaftNodes: t.GetRaftNodes(),338 NodeID: t.GetNodeID(),339 }, nil340 case *internal.ErrorResponse:341 return nil, fmt.Errorf("rpc failed: %s", t.GetHeader().GetError())342 default:343 return nil, fmt.Errorf("rpc failed: unknown response type: %v", t.String())344 }345}346// enableRaft attempts to promote a node at remoteAddr using localAddr as the current347// node's cluster address348func (r *rpc) enableRaft(addr string, peers []string) error {349 req := &internal.PromoteRaftRequest{350 Addr: proto.String(addr),351 RaftNodes: peers,352 }353 resp, err := r.call(addr, req)354 if err != nil {355 return err356 }357 switch t := resp.(type) {358 case *internal.PromoteRaftResponse:359 return nil360 case *internal.ErrorResponse:361 return fmt.Errorf("rpc failed: %s", t.GetHeader().GetError())362 default:363 return fmt.Errorf("rpc failed: unknown response type: %v", t.String())364 }365}366// call sends an encoded request to the remote leader and returns367// an encoded response value.368func (r *rpc) call(dest string, req proto.Message) (proto.Message, error) {369 // Determine type of request370 var rpcType internal.RPCType371 switch t := req.(type) {372 case *internal.JoinRequest:373 rpcType = internal.RPCType_Join374 case *internal.FetchDataRequest:375 rpcType = internal.RPCType_FetchData376 case *internal.PromoteRaftRequest:377 rpcType = internal.RPCType_PromoteRaft378 default:379 return nil, fmt.Errorf("unknown rpc request type: %v", t)380 }381 // Create a connection to the leader.382 conn, err := net.DialTimeout("tcp", dest, leaderDialTimeout)383 if err != nil {384 return nil, fmt.Errorf("rpc dial: %v", err)385 }386 defer conn.Close()387 // Write a marker byte for rpc messages.388 _, err = conn.Write([]byte{MuxRPCHeader})389 if err != nil {390 return nil, err391 }392 b, err := proto.Marshal(req)393 if err != nil {394 return nil, fmt.Errorf("rpc marshal: %v", err)395 }396 // Write request size & bytes.397 if _, err := conn.Write(pack(rpcType, b)); err != nil {398 return nil, fmt.Errorf("write %v rpc: %s", rpcType, err)399 }400 data, err := ioutil.ReadAll(conn)...

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service.go

Source:service.go Github

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...11 Keyword *KeywordNode12 Name *IdentNode13 OpenBrace *RuneNode14 Decls []ServiceElement15 CloseBrace *RuneNode16}17func (*ServiceNode) fileElement() {}18// NewServiceNode creates a new *ServiceNode. All arguments must be non-nil.19// - keyword: The token corresponding to the "service" keyword.20// - name: The token corresponding to the service's name.21// - openBrace: The token corresponding to the "{" rune that starts the body.22// - decls: All declarations inside the service body.23// - closeBrace: The token corresponding to the "}" rune that ends the body.24func NewServiceNode(keyword *KeywordNode, name *IdentNode, openBrace *RuneNode, decls []ServiceElement, closeBrace *RuneNode) *ServiceNode {25 if keyword == nil {26 panic("keyword is nil")27 }28 if name == nil {29 panic("name is nil")30 }31 if openBrace == nil {32 panic("openBrace is nil")33 }34 if closeBrace == nil {35 panic("closeBrace is nil")36 }37 children := make([]Node, 0, 4+len(decls))38 children = append(children, keyword, name, openBrace)39 for _, decl := range decls {40 children = append(children, decl)41 }42 children = append(children, closeBrace)43 for _, decl := range decls {44 switch decl := decl.(type) {45 case *OptionNode, *RPCNode, *EmptyDeclNode:46 default:47 panic(fmt.Sprintf("invalid ServiceElement type: %T", decl))48 }49 }50 return &ServiceNode{51 compositeNode: compositeNode{52 children: children,53 },54 Keyword: keyword,55 Name: name,56 OpenBrace: openBrace,57 Decls: decls,58 CloseBrace: closeBrace,59 }60}61// ServiceElement is an interface implemented by all AST nodes that can62// appear in the body of a service declaration.63type ServiceElement interface {64 Node65 serviceElement()66}67var _ ServiceElement = (*OptionNode)(nil)68var _ ServiceElement = (*RPCNode)(nil)69var _ ServiceElement = (*EmptyDeclNode)(nil)70// RPCDeclNode is a placeholder interface for AST nodes that represent RPC71// declarations. This allows NoSourceNode to be used in place of *RPCNode72// for some usages.73type RPCDeclNode interface {74 Node75 GetInputType() Node76 GetOutputType() Node77}78var _ RPCDeclNode = (*RPCNode)(nil)79var _ RPCDeclNode = NoSourceNode{}80// RPCNode represents an RPC declaration. Example:81//82// rpc Foo (Bar) returns (Baz);83type RPCNode struct {84 compositeNode85 Keyword *KeywordNode86 Name *IdentNode87 Input *RPCTypeNode88 Returns *KeywordNode89 Output *RPCTypeNode90 Semicolon *RuneNode91 OpenBrace *RuneNode92 Decls []RPCElement93 CloseBrace *RuneNode94}95func (n *RPCNode) serviceElement() {}96// NewRPCNode creates a new *RPCNode with no body. All arguments must be non-nil.97// - keyword: The token corresponding to the "rpc" keyword.98// - name: The token corresponding to the RPC's name.99// - input: The token corresponding to the RPC input message type.100// - returns: The token corresponding to the "returns" keyword that precedes the output type.101// - output: The token corresponding to the RPC output message type.102// - semicolon: The token corresponding to the ";" rune that ends the declaration.103func NewRPCNode(keyword *KeywordNode, name *IdentNode, input *RPCTypeNode, returns *KeywordNode, output *RPCTypeNode, semicolon *RuneNode) *RPCNode {104 if keyword == nil {105 panic("keyword is nil")106 }107 if name == nil {108 panic("name is nil")109 }110 if input == nil {111 panic("input is nil")112 }113 if returns == nil {114 panic("returns is nil")115 }116 if output == nil {117 panic("output is nil")118 }119 if semicolon == nil {120 panic("semicolon is nil")121 }122 children := []Node{keyword, name, input, returns, output, semicolon}123 return &RPCNode{124 compositeNode: compositeNode{125 children: children,126 },127 Keyword: keyword,128 Name: name,129 Input: input,130 Returns: returns,131 Output: output,132 Semicolon: semicolon,133 }134}135// NewRPCNodeWithBody creates a new *RPCNode that includes a body (and possibly136// options). All arguments must be non-nil.137// - keyword: The token corresponding to the "rpc" keyword.138// - name: The token corresponding to the RPC's name.139// - input: The token corresponding to the RPC input message type.140// - returns: The token corresponding to the "returns" keyword that precedes the output type.141// - output: The token corresponding to the RPC output message type.142// - openBrace: The token corresponding to the "{" rune that starts the body.143// - decls: All declarations inside the RPC body.144// - closeBrace: The token corresponding to the "}" rune that ends the body.145func NewRPCNodeWithBody(keyword *KeywordNode, name *IdentNode, input *RPCTypeNode, returns *KeywordNode, output *RPCTypeNode, openBrace *RuneNode, decls []RPCElement, closeBrace *RuneNode) *RPCNode {146 if keyword == nil {147 panic("keyword is nil")148 }149 if name == nil {150 panic("name is nil")151 }152 if input == nil {153 panic("input is nil")154 }155 if returns == nil {156 panic("returns is nil")157 }158 if output == nil {159 panic("output is nil")160 }161 if openBrace == nil {162 panic("openBrace is nil")163 }164 if closeBrace == nil {165 panic("closeBrace is nil")166 }167 children := make([]Node, 0, 7+len(decls))168 children = append(children, keyword, name, input, returns, output, openBrace)169 for _, decl := range decls {170 children = append(children, decl)171 }172 children = append(children, closeBrace)173 for _, decl := range decls {174 switch decl := decl.(type) {175 case *OptionNode, *EmptyDeclNode:176 default:177 panic(fmt.Sprintf("invalid RPCElement type: %T", decl))178 }179 }180 return &RPCNode{181 compositeNode: compositeNode{182 children: children,183 },184 Keyword: keyword,185 Name: name,186 Input: input,187 Returns: returns,188 Output: output,189 OpenBrace: openBrace,190 Decls: decls,191 CloseBrace: closeBrace,192 }193}194func (n *RPCNode) GetInputType() Node {195 return n.Input.MessageType196}197func (n *RPCNode) GetOutputType() Node {198 return n.Output.MessageType199}200// RPCElement is an interface implemented by all AST nodes that can201// appear in the body of an rpc declaration (aka method).202type RPCElement interface {203 Node204 methodElement()205}206var _ RPCElement = (*OptionNode)(nil)207var _ RPCElement = (*EmptyDeclNode)(nil)208// RPCTypeNode represents the declaration of a request or response type for an209// RPC. Example:210//211// (stream foo.Bar)212type RPCTypeNode struct {213 compositeNode214 OpenParen *RuneNode215 Stream *KeywordNode216 MessageType IdentValueNode217 CloseParen *RuneNode218}219// NewRPCTypeNode creates a new *RPCTypeNode. All arguments must be non-nil220// except stream, which may be nil.221// - openParen: The token corresponding to the "(" rune that starts the declaration.222// - stream: The token corresponding to the "stream" keyword or nil if not present.223// - msgType: The token corresponding to the message type's name.224// - closeParen: The token corresponding to the ")" rune that ends the declaration.225func NewRPCTypeNode(openParen *RuneNode, stream *KeywordNode, msgType IdentValueNode, closeParen *RuneNode) *RPCTypeNode {226 if openParen == nil {227 panic("openParen is nil")228 }229 if msgType == nil {230 panic("msgType is nil")231 }232 if closeParen == nil {233 panic("closeParen is nil")234 }235 var children []Node236 if stream != nil {237 children = []Node{openParen, stream, msgType, closeParen}238 } else {239 children = []Node{openParen, msgType, closeParen}240 }241 return &RPCTypeNode{242 compositeNode: compositeNode{243 children: children,244 },245 OpenParen: openParen,246 Stream: stream,247 MessageType: msgType,248 CloseParen: closeParen,249 }250}...

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1import (2type Args struct {3}4type Quotient struct {5}6func main() {7 client, err := rpc.DialHTTP("tcp", "localhost:1234")8 if err != nil {9 fmt.Println("Error in Dialing", err)10 }11 args := Args{17, 8}12 err = client.Call("Arith.Multiply", args, &reply)13 if err != nil {14 fmt.Println("Error in Calling", err)15 }16 fmt.Println("Arith: ", reply)17 err = client.Call("Arith.Divide", args, &quot)18 if err != nil {19 fmt.Println("Error in Calling", err)20 }21 fmt.Println("Arith: ", quot.Quo, quot.Rem)22 client.Close()23}

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Close

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1import (2func main() {3 conn, err := net.Dial("tcp", "localhost:1234")4 if err != nil {5 fmt.Println(err)6 }7 client := rpc.NewClientWithCodec(jsonrpc.NewClientCodec(conn))8 err = client.Call("HelloService.Hello", "hello", &reply)9 if err != nil {10 fmt.Println(err)11 }12 fmt.Println(reply)13 client.Close()14}15The server.Close() method is used to close the listener. The

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Close

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1import (2type Args struct {3}4type Quotient struct {5}6func (t *Arith) Multiply(args *Args, reply *int) error {7}8func (t *Arith) Divide(args *Args, quo *Quotient) error {9 if args.B == 0 {10 return errors.New("divide by zero")11 }12}13func main() {14 client, err := rpc.DialHTTP("tcp", "

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Close

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1import (2type Args struct {3}4type Reply struct {5}6func main() {7 client, err := rpc.Dial("tcp", "localhost:1234")8 if err != nil {9 fmt.Println(err)10 }11 defer client.Close()12 args := Args{7, 8}13 err = client.Call("Arith.Multiply", args, &reply)14 if err != nil {15 fmt.Println(err)16 }17 fmt.Printf("Arith: %d*%d=%d18}19import (20type Args struct {21}22type Reply struct {23}24func main() {25 client, err := rpc.Dial("tcp", "localhost:1234")26 if err != nil {27 fmt.Println(err)28 }29 defer client.Close()30 args := Args{7, 8}31 err = client.Call("Arith.Divide", args, &reply)32 if err != nil {33 fmt.Println(err)34 }35 fmt.Printf("Arith: %d/%d=%d36}37import (38type Args struct {39}40type Reply struct {41}42func main() {43 client, err := rpc.Dial("tcp", "localhost:1234")44 if err != nil {45 fmt.Println(err)46 }47 defer client.Close()48 args := Args{7, 8}49 err = client.Call("Arith.Add", args, &reply)50 if err != nil {51 fmt.Println(err)52 }53 fmt.Printf("Arith: %d+%d=%d54}55import (56type Args struct {57}58type Reply struct {59}

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1import (2func main() {3 client, err := rpc.DialHTTP("tcp", "localhost:1234")4 if err != nil {5 fmt.Println("Error in dialing: ", err)6 }7 err = client.Call("HelloService.Hello", "World", &reply)8 if err != nil {9 fmt.Println("Error in call: ", err)10 }11 fmt.Println(reply)12 client.Close()13}14import (15func main() {16 client, err := rpc.DialHTTP("tcp", "localhost:1234")17 if err != nil {18 fmt.Println("Error in dialing: ", err)19 }20 err = client.Call("HelloService.Hello", "World", &reply)21 if err != nil {22 fmt.Println("Error in call: ", err)23 }24 fmt.Println(reply)25 client.Close()26}27import (28func main() {29 client, err := rpc.DialHTTP("tcp", "localhost:1234")30 if err != nil {31 fmt.Println("Error in dialing: ", err)32 }33 err = client.Call("HelloService.Hello", "World", &reply)34 if err != nil {35 fmt.Println("Error in call: ", err)36 }37 fmt.Println(reply)38 client.Close()39}40import (41func main() {42 client, err := rpc.DialHTTP("tcp", "localhost:1234")43 if err != nil {44 fmt.Println("Error in dialing: ", err)45 }46 err = client.Call("HelloService.Hello", "World", &reply)47 if err != nil {48 fmt.Println("Error in call: ", err)49 }50 fmt.Println(reply)51 client.Close()52}53import (54func main() {55 client, err := rpc.DialHTTP("tcp

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1import (2func main() {3 client, err := rpc.DialHTTP("tcp", "localhost:1234")4 if err != nil {5 fmt.Println(err)6 }7 client.Close()8}9net/rpc.(*Client).Close(0x0)10main.main()112019/08/25 17:19:01 rpc.Register: method "HelloService.Hello" has 1 input parameters; needs exactly three122019/08/25 17:19:01 rpc.Register: method "HelloService.Hello" has 1 input parameters; needs exactly three132019/08/25 17:19:01 rpc.Register: method "HelloService.Hello" has 1 input parameters; needs exactly three142019/08/25 17:19:01 rpc.Register: method "HelloService.Hello" has 1 input parameters; needs exactly three152019/08/25 17:19:01 rpc.Register: method "HelloService.Hello" has 1 input parameters; needs exactly three162019/08/25 17:19:01 rpc.Register: method "HelloService.Hello" has 1 input parameters; needs exactly three172019/08/25 17:19:01 rpc.Register: method "HelloService.Hello" has 1 input parameters; needs exactly three

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1func main() {2 if client, err = rpc.DialHTTP("tcp", "localhost:1234"); err != nil {3 log.Fatal("dialing:", err)4 }5 if err = client.Call("HelloService.Hello", args, &reply); err != nil {6 log.Fatal("arith error:", err)7 }8 fmt.Printf("Arith: %d*%d=%d9 client.Close()10}11func main() {12 if client, err = rpc.DialHTTP("tcp", "localhost:1234"); err != nil {13 log.Fatal("dialing:", err)14 }15 if err = client.Call("HelloService.Hello", args, &reply); err != nil {16 log.Fatal("arith error:", err)17 }18 fmt.Printf("Arith: %d*%d=%d19 client.Close()20}21func main() {22 if client, err = rpc.DialHTTP("tcp", "localhost:1234"); err != nil {23 log.Fatal("dialing:", err)24 }25 if err = client.Call("HelloService.Hello", args, &reply); err != nil {26 log.Fatal("arith error:", err)27 }28 fmt.Printf("Arith: %d*%d=%d29 client.Close()30}31func main() {32 if client, err = rpc.DialHTTP("tcp", "localhost:1234"); err != nil {33 log.Fatal("dialing:", err)34 }35 if err = client.Call("HelloService.Hello", args, &reply); err != nil {

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1func main() {2 client, _ = rpc.Dial("tcp", "localhost:1234")3 err := client.Call("HelloService.Hello", "World", &reply)4 if err != nil {5 log.Fatal(err)6 }7 fmt.Println(reply)8 client.Close()9}10import (11type HelloService struct{}12func (p *HelloService) Hello(request string, reply *string) error {13}14func main() {15 helloService := new(HelloService)16 rpc.Register(helloService)17 rpc.HandleHTTP()18 err := http.ListenAndServe(":1234", nil)19 if err != nil {20 log.Fatal("ListenAndServe error: ", err)21 }22}23import (24func main() {25 client, _ := rpc.DialHTTP("tcp", "localhost:123

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