How to use Write method of netext Package

Best K6 code snippet using netext.Write

forward.go

Source:forward.go

...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}...

tcp.go

Source:tcp.go

...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()...

server.go

Source:server.go

...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}...

Write

Using AI Code Generation

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}

Write

Using AI Code Generation

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}

Write

Using AI Code Generation

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)

Write

Using AI Code Generation

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 (

Write

Using AI Code Generation

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|

Write

Using AI Code Generation

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}

Write

Using AI Code Generation

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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