How to use Write method of netext Package

Best K6 code snippet using netext.Write

forward.go

Source:forward.go Github

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...25 logger: logger,26 udpBufferPool: bytesext.NewPoolWith(0, math.MaxUint16),27 }28}29func (f *forwarder) ForwardTCP(ctx context.Context, downstream io.ReadWriteCloser) error {30 upstreamConn, err := f.dialer.DialContext(ctx, "tcp", f.opts.UpstreamTCP)31 if err != nil {32 upstreamConn.Close()33 return err34 }35 upstream := netext.NewTimedConn(upstreamConn, f.opts.Timeout, f.opts.Timeout)36 errc := make(chan error, 2)37 go f.stream(downstream, upstream, errc)38 go f.stream(upstream, downstream, errc)39 return f.wait(ctx, upstreamConn.Close, downstream.Close, errc, 2)40}41func (f *forwarder) ForwardUDP(ctx context.Context, downstream io.ReadWriteCloser) error {42 upstreamConn, err := f.dialer.DialContext(ctx, "udp", f.opts.UpstreamUDP)43 if err != nil {44 downstream.Close()45 return err46 }47 upstream := netext.NewTimedConn(upstreamConn, f.opts.Timeout, f.opts.Timeout)48 errc := make(chan error, 2)49 go func() { // upstream -> downstream50 buf := f.udpBufferPool.Get(math.MaxUint16)51 var (52 n int53 err error54 )55 for {56 if n, err = upstream.Read(buf); err != nil {57 break58 }59 if err = encoding.WriteU16SizedBytes(downstream, buf[:n]); err == nil {60 if f, ok := downstream.(ioext.Flusher); ok {61 err = f.Flush()62 }63 }64 if err != nil {65 break66 }67 }68 f.udpBufferPool.Put(buf)69 errc <- err70 }()71 go func() { // downstream -> upstream72 buf := f.udpBufferPool.Get(math.MaxUint16)73 var (74 n int75 err error76 )77 for {78 if n, err = encoding.ReadU16SizedBytes(downstream, buf); err != nil {79 break80 }81 // NOTE: use of WriteTo with pre-connected connection82 if _, err = upstream.Write(buf[:n]); err != nil {83 break84 }85 }86 f.udpBufferPool.Put(buf)87 errc <- err88 }()89 return f.wait(ctx, upstreamConn.Close, downstream.Close, errc, 2)90}91func (f *forwarder) wait(ctx context.Context, upCloseFunc, downCloseFunc func() error, errc <-chan error, n int) error {92 donec := ctx.Done()93 multierr := &errorsext.MultiErr{}94 closed := false95 for n > 0 {96 select {97 case err := <-errc:98 n--99 multierr.Append(err)100 case <-donec:101 donec = nil102 }103 if !closed {104 closed = true105 _ = upCloseFunc()106 _ = downCloseFunc()107 }108 }109 if !closed {110 _ = upCloseFunc()111 _ = downCloseFunc()112 }113 return multierr.Err()114}115func (f *forwarder) stream(dst io.Writer, src io.Reader, errc chan error) {116 _, err := goodogioutil.Copy(dst, src, false)117 errc <- err118}...

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tcp.go

Source:tcp.go Github

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...14 server *netext.Server15 downstreams *counter16 upstreams *counter17 connectErrors *counter18 readWriteErrors *counter19}20func newTCPProxy(conf Config, connector Connector, logger *zap.Logger) (*tcpProxy, error) {21 p := &tcpProxy{22 conf: conf,23 logger: logger.Named("tcp"),24 connector: connector,25 downstreams: newCounter("tcp.downstreams"),26 upstreams: newCounter("tcp.upstreams"),27 connectErrors: newCounter("tcp.errors.connect"),28 readWriteErrors: newCounter("tcp.errors.read-write"),29 }30 server, err := netext.NewTCPServer(conf.ListenAddr, p.handle)31 if err != nil {32 return nil, err33 }34 p.server = server35 return p, nil36}37func (p *tcpProxy) Serve(ctx context.Context) error {38 return p.server.Serve(netext.WithContext(ctx))39}40func (p *tcpProxy) Close() error {41 return p.server.Close()42}43func (p *tcpProxy) handle(ctx context.Context, downstreamConn net.Conn) {44 p.downstreams.Inc()45 upstream, err := p.connector.Connect(ctx)46 if err != nil {47 p.connectErrors.Inc()48 p.downstreams.Dec()49 downstreamConn.Close()50 p.logger.Error("connect to upstream failed",51 zap.String("upstream", p.conf.ServerHost()),52 zap.String("downstream", downstreamConn.RemoteAddr().String()),53 zap.Error(err),54 )55 return56 }57 p.upstreams.Inc()58 errc := make(chan error, 2)59 streamFunc := func(dst, src io.ReadWriter, msg string) {60 _, err := goodogioutil.Copy(dst, src, false)61 p.logger.Debug(msg,62 zap.String("upstream", p.conf.ServerHost()),63 zap.String("downstream", downstreamConn.RemoteAddr().String()),64 zap.Error(err),65 )66 if err != nil {67 p.readWriteErrors.Inc()68 }69 errc <- err70 }71 downstream := netext.NewTimedConn(downstreamConn, p.conf.Timeout, p.conf.Timeout)72 upstream = tryWrapWithCompression(upstream, p.conf.Compression)73 go streamFunc(downstream, upstream, "upstream->downstream done")74 go streamFunc(upstream, downstream, "downstream->upstream done")75 select {76 case <-ctx.Done():77 case <-errc:78 }79 upstream.Close()80 downstream.Close()81 p.downstreams.Dec()...

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server.go

Source:server.go Github

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...25 }26}27func udpEchoServer(ctx context.Context, laddr string, t *testing.T) {28 server, err := netext.NewUDPServer(laddr, func(_ context.Context, conn net.PacketConn, addr net.Addr, data []byte) {29 if _, err := conn.WriteTo(data, addr); err != nil {30 t.Logf("udp echo: %v", err)31 }32 })33 if err != nil {34 panic(err)35 }36 go func() {37 <-ctx.Done()38 _ = server.Close()39 }()40 if err := server.Serve(netext.WithContext(ctx)); err != nil {41 panic(err)42 }43}...

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Write

Using AI Code Generation

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1import (2func main() {3 tcpAddr, err := net.ResolveTCPAddr("tcp4", service)4 checkError(err)5 listener, err := net.ListenTCP("tcp", tcpAddr)6 checkError(err)7 for {8 conn, err := listener.Accept()9 if err != nil {10 }11 go handleClient(conn)12 }13}14func handleClient(conn net.Conn) {15 defer conn.Close()16 for {17 n, err := conn.Read(buf[0:])18 if err != nil {19 }20 fmt.Println("Received:")21 fmt.Println(string(buf[0:n]))22 _, err2 := conn.Write(buf[0:n])23 if err2 != nil {24 }25 }26}27func checkError(err error) {28 if err != nil {29 fmt.Fprintf(os.Stderr, "Fatal error: %s", err.Error())30 os.Exit(1)31 }32}33import (34func main() {35 tcpAddr, err := net.ResolveTCPAddr("tcp4", service)36 checkError(err)37 for {38 conn, err := net.DialTCP("tcp", nil, tcpAddr)39 checkError(err)40 _, err = conn.Write([]byte("timestamp"))41 checkError(err)42 n, err := conn.Read(buf[0:])43 checkError(err)44 fmt.Println(string(buf[0:n]))45 time.Sleep(1 * time.Second)46 }47}48func checkError(err error) {49 if err != nil {50 fmt.Fprintf(os.Stderr, "Fatal error: %s", err.Error())51 os.Exit(1)52 }53}

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Write

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1import (2func main() {3 if len(os.Args) != 2 {4 fmt.Fprintf(os.Stderr, "Usage: %s host:port ", os.Args[0])5 os.Exit(1)6 }7 tcpAddr, err := net.ResolveTCPAddr("tcp4", service)8 checkError(err)9 conn, err := net.DialTCP("tcp", nil, tcpAddr)10 checkError(err)11 _, err = conn.Write([]byte("HEAD / HTTP/1.0\r12 checkError(err)13 result, err := readFully(conn)14 checkError(err)15 fmt.Println(string(result))16 os.Exit(0)17}18func readFully(conn *net.TCPConn) ([]byte, error) {19 defer conn.Close()20 result := bytes.NewBuffer(nil)21 for {22 n, err := conn.Read(buf[0:])23 result.Write(buf[0:n])24 if err != nil {25 if err == io.EOF {26 }27 }28 }29 return result.Bytes(), nil30}31func checkError(err error) {32 if err != nil {33 fmt.Fprintf(os.Stderr, "Fatal error: %s", err.Error())34 os.Exit(1)35 }36}

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Write

Using AI Code Generation

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1import (2func main() {3 conn, err := net.Dial("tcp", "localhost:8080")4 if err != nil {5 fmt.Println(err)6 }7 defer conn.Close()8 fmt.Println("Connected to server")9 _, err = io.WriteString(conn, "Hello server10 if err != nil {11 fmt.Println(err)12 }13 buf := make([]byte, 1024)14 _, err = conn.Read(buf)15 if err != nil {16 fmt.Println(err)17 }18 fmt.Println("Received from server: ", string(buf))19}20import (21func main() {22 conn, err := net.Dial("tcp", "localhost:8080")23 if err != nil {24 fmt.Println(err)25 }26 defer conn.Close()27 fmt.Println("Connected to server")28 _, err = io.WriteString(conn, "Hello server29 if err != nil {30 fmt.Println(err)31 }32 buf := make([]byte, 1024)33 _, err = io.ReadFull(conn, buf)34 if err != nil {35 fmt.Println(err)36 }37 fmt.Println("Received from server: ", string(buf))38}39import (40func main() {41 conn, err := net.Dial("tcp", "localhost:8080")42 if err != nil {43 fmt.Println(err)44 }45 defer conn.Close()46 fmt.Println("Connected to server")47 _, err = io.WriteString(conn, "Hello server48 if err != nil {49 fmt.Println(err)50 }51 buf := make([]byte, 1024)52 _, err = io.ReadAtLeast(conn, buf, 10)53 if err != nil {54 fmt.Println(err)

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Write

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1import (2func Test(t *testing.T) {3req, err := http.NewRequest("GET", "/hello", nil)4if err != nil {5t.Fatal(err)6}7rr := httptest.NewRecorder()8handler := http.HandlerFunc(HelloHandler)9handler.ServeHTTP(rr, req)10if status := rr.Code; status != http.StatusOK {11t.Errorf("handler returned wrong status code: got %v want %v",12}13if rr.Body.String() != expected {14t.Errorf("handler returned unexpected body: got %v want %v",15rr.Body.String(), expected)16}17}18func HelloHandler(w http.ResponseWriter, r *http.Request) {19w.Write([]byte("Hello, world!"))20}21--- PASS: Test (0.00s)22import (23func Test(t *testing.T) {24req, err := http.NewRequest("GET", "/hello", nil)25if err != nil {26t.Fatal(err)27}28rr := httptest.NewRecorder()29handler := http.HandlerFunc(HelloHandler)30handler.ServeHTTP(rr, req)31if status := rr.Code; status != http.StatusOK {32t.Errorf("handler returned wrong status code: got %v want %v",33}34if rr.Body.String() != expected {35t.Errorf("handler returned unexpected body: got %v want %v",36rr.Body.String(), expected)37}38}39func HelloHandler(w http.ResponseWriter, r *http.Request) {40w.Write([]byte("Hello, world!"))41}42--- PASS: Test (0.00s)43import (

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Write

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1func main() {2 file, err := os.Create("test.txt")3 if err != nil {4 }5 defer file.Close()6 _, err = file.WriteString("Hello World")7 if err != nil {8 }9 err = file.Sync()10 if err != nil {11 }12}13func main() {14 file, err := os.OpenFile("test.txt", os.O_APPEND|os.O_WRONLY, 0644)15 if err != nil {16 }17 defer file.Close()18 _, err = file.WriteString("Hello World")19 if err != nil {20 }21 err = file.Sync()22 if err != nil {23 }24}25func main() {26 file, err := os.OpenFile("test.txt", os.O_APPEND|os.O_WRONLY, 0644)27 if err != nil {28 }29 defer file.Close()30 _, err = file.WriteString("Hello World")31 if err != nil {32 }33 err = file.Sync()34 if err != nil {35 }36}37func main() {38 file, err := os.OpenFile("test.txt", os.O_APPEND|os.O_WRONLY, 0644)39 if err != nil {40 }41 defer file.Close()42 _, err = file.WriteString("Hello World")43 if err != nil {44 }45 err = file.Sync()46 if err != nil {47 }48}49func main() {50 file, err := os.OpenFile("test.txt", os.O_APPEND|

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Write

Using AI Code Generation

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1func main() {2 var data = []byte("Hello World!")3 n, err = netext.Write(data)4 if err != nil {5 fmt.Println(err)6 } else {7 fmt.Println("Write successful")8 fmt.Printf("Wrote %d bytes9 }10}11func main() {12 var data = make([]byte, 10)13 n, err = netext.Read(data)14 if err != nil {15 fmt.Println(err)16 } else {17 fmt.Println("Read successful")18 fmt.Printf("Read %d bytes19 fmt.Println("Data read: ", string(data))20 }21}22func main() {23 err = netext.Close()24 if err != nil {25 fmt.Println(err)26 } else {27 fmt.Println("Close successful")28 }29}30func main() {31 err = netext.Open()32 if err != nil {33 fmt.Println(err)34 } else {35 fmt.Println("Open successful")36 }37}38func main() {39 err = netext.Connect()40 if err != nil {41 fmt.Println(err)42 } else {43 fmt.Println("Connect successful")44 }45}46func main() {47 err = netext.Accept()48 if err != nil {49 fmt.Println(err)50 } else {51 fmt.Println("Accept successful")52 }53}

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Write

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1import (2func main() {3conn, _ := net.Dial("tcp", "localhost:8080")4conn.Write([]byte("Hello, World"))5conn.Close()6}7import (8func main() {9conn, _ := net.Dial("tcp", "localhost:8080")10conn.WriteString("Hello, World")11conn.Close()12}13import (14func main() {15conn, _ := net.Dial("tcp", "localhost:8080")16data := make([]byte, 1024)17conn.Read(data)18fmt.Println(string(data))19conn.Close()20}21import (22func main() {23conn, _ := net.Dial("tcp", "localhost:8080")24data := make([]byte, 1024)25n, _ := conn.ReadFrom(data)26fmt.Println(string(data[0:n]))27conn.Close()28}29import (30func main() {31conn, _ := net.Dial("tcp", "localhost:8080")32data := make([]byte, 1024)33n, _ := conn.ReadAtLeast(data, 5)34fmt.Println(string(data[0:n]))35conn.Close()36}

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