How to use DialContext method of netext Package

Best K6 code snippet using netext.DialContext

dialer.go

Source:dialer.go

...54}55func (b BlackListedIPError) Error() string {56	return fmt.Sprintf("IP (%s) is in a blacklisted range (%s)", b.ip, b.net)57}58// DialContext wraps the net.Dialer.DialContext and handles the k6 specifics59func (d *Dialer) DialContext(ctx context.Context, proto, addr string) (net.Conn, error) {60	delimiter := strings.LastIndex(addr, ":")61	host := addr[:delimiter]62	// lookup for domain defined in Hosts option before trying to resolve DNS.63	ip, ok := d.Hosts[host]64	if !ok {65		var err error66		ip, err = d.Resolver.FetchOne(host)67		if err != nil {68			return nil, err69		}70	}71	for _, ipnet := range d.Blacklist {72		if (*net.IPNet)(ipnet).Contains(ip) {73			return nil, BlackListedIPError{ip: ip, net: ipnet}74		}75	}76	ipStr := ip.String()77	if strings.ContainsRune(ipStr, ':') {78		ipStr = "[" + ipStr + "]"79	}80	conn, err := d.Dialer.DialContext(ctx, proto, ipStr+":"+addr[delimiter+1:])81	if err != nil {82		return nil, err83	}84	conn = &Conn{conn, &d.BytesRead, &d.BytesWritten}85	return conn, err86}87// GetTrail creates a new NetTrail instance with the Dialer88// sent and received data metrics and the supplied times and tags.89// TODO: Refactor this according to90// https://github.com/luckybroman5/http-log-reconstructor/k6/pull/1203#discussion_r33793837091func (d *Dialer) GetTrail(92	startTime, endTime time.Time, fullIteration bool, emitIterations bool, tags *stats.SampleTags,93) *NetTrail {94	bytesWritten := atomic.SwapInt64(&d.BytesWritten, 0)...

forward.go

Source:forward.go

...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 {...

DialContext

Using AI Code Generation

1import (2func main() {3	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)4	defer cancel()5	conn, err := net.DialContext(ctx, "tcp", "www.google.com:80")6	if err != nil {7		fmt.Println(err)8	}9	defer conn.Close()10	fmt.Println("Connection Established")11}12import (13func main() {14	conn, err := net.DialTimeout("tcp", "www.google.com:80", 3*time.Second)15	if err != nil {16		fmt.Println(err)17	}18	defer conn.Close()19	fmt.Println("Connection Established")20}21import (22func main() {23	conn, err := net.Dial("tcp", "www.google.com:80")24	if err != nil {25		fmt.Println(err)26	}27	defer conn.Close()28	fmt.Println("Connection Established")29}30import (31func main() {32	conn, err := net.DialTimeout("tcp", "www.google.com:80", 3*time.Second)33	if err != nil {34		fmt.Println(err)35	}36	defer conn.Close()37	fmt.Println("Connection Established")38}39import (40func main() {41	conn, err := net.Dial("tcp", "www.google.com:80")42	if err != nil {43		fmt.Println(err)44	}45	defer conn.Close()46	fmt.Println("Connection Established")47}

DialContext

Using AI Code Generation

1import (2func main() {3	dialer := net.Dialer{4	}5	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)6	defer cancel()7	conn, err := dialer.DialContext(ctx, "tcp", "golang.org:80")8	if err != nil {9		fmt.Println("Error:", err)10	}11	defer conn.Close()12	fmt.Println("Connected!")13}

DialContext

Using AI Code Generation

1func main() {2    dialer := &net.Dialer{3    }4    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)5    defer cancel()6    conn, err := dialer.DialContext(ctx, "tcp", "google.com:80")7    if err != nil {8        fmt.Println(err)9    }10    defer conn.Close()11    if _, err := conn.Write([]byte("GET / HTTP/1.0\r12")); err != nil {13        fmt.Println(err)14    }15    resp, err := ioutil.ReadAll(conn)16    if err != nil {17        fmt.Println(err)18    }19    fmt.Println(string(resp))20}21Content-Type: text/html; charset=UTF-822<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">

DialContext

Using AI Code Generation

1func main() {2    conn, err := net.Dial("tcp", "localhost:8000")3    if err != nil {4        log.Fatal(err)5    }6    defer conn.Close()7    if err != nil {8        log.Fatal(err)9    }10    if err := req.Write(conn); err != nil {11        log.Fatal(err)12    }13    res, err := http.ReadResponse(bufio.NewReader(conn), req)14    if err != nil {15        log.Fatal(err)16    }17    fmt.Println(res.Status)18}19func main() {20    conn, err := net.Dial("tcp", "localhost:8000")21    if err != nil {22        log.Fatal(err)23    }24    defer conn.Close()25    if err != nil {26        log.Fatal(err)27    }28    if err := req.Write(conn); err != nil {29        log.Fatal(err)30    }31    res, err := http.ReadResponse(bufio.NewReader(conn), req)32    if err != nil {33        log.Fatal(err)34    }35    fmt.Println(res.Status)36}37func main() {38    conn, err := net.Dial("tcp", "localhost:8000")39    if err != nil {40        log.Fatal(err)41    }42    defer conn.Close()43    if err != nil {44        log.Fatal(err)45    }46    if err := req.Write(conn); err != nil {47        log.Fatal(err)48    }49    res, err := http.ReadResponse(bufio.NewReader(conn), req)50    if err != nil {51        log.Fatal(err)52    }53    fmt.Println(res.Status)54}

DialContext

Using AI Code Generation

1import (2func main() {3	d := net.Dialer{}4	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)5	defer cancel()6	conn, err := d.DialContext(ctx, "tcp", "localhost:80")7	if err != nil {8		fmt.Println(err)9	}10	defer conn.Close()11	fmt.Println("Connection established")12}

DialContext

Using AI Code Generation

1import (2func main() {3    ctx := context.Background()4    d := net.Dialer{}5    conn, err := d.DialContext(ctx, "tcp", "example.com:80")6    if err != nil {7        fmt.Println(err)8    }9    fmt.Println(conn)10}11&{0xc0000a4000 0xc0000a4000}12Dialer{13}

DialContext

Using AI Code Generation

1conn, err := netext.DialContext(ctx, "tcp", "www.google.com:80")2if err != nil {3fmt.Println("Error while connecting to server: ", err)4}5defer conn.Close()6conn, err := netext.DialTimeout("tcp", "www.google.com:80", 30*time.Second)7if err != nil {8fmt.Println("Error while connecting to server: ", err)9}10defer conn.Close()11conn, err := netext.Dial("tcp", "www.google.com:80")12if err != nil {13fmt.Println("Error while connecting to server: ", err)14}15defer conn.Close()16l, err := netext.Listen("tcp", ":8080")17if err != nil {18fmt.Println("Error while listening to port: ", err)19}20defer l.Close()21c, err := netext.ListenPacket("udp", ":8080")22if err != nil {23fmt.Println("Error while listening to port: ", err)24}25defer c.Close()26addr, err := netext.ResolveIPAddr("ip", "www.google.com")27if err != nil {28fmt.Println("Error while resolving IP address: ", err)29}30fmt.Println("IP address: ", addr)31addr, err := netext.ResolveTCPAddr("tcp", "www.google.com:80")32if err != nil {33fmt.Println("Error while resolving TCP address: ", err)34}35fmt.Println("TCP address: ", addr)36addr, err := netext.ResolveUDPAddr("udp", "www.google.com:80")37if err != nil {38fmt.Println("Error while resolving UDP address: ", err)39}40fmt.Println("UDP address: ", addr)41addr, err := netext.ResolveUnixAddr("unix", "/tmp/unixdomainsocket")42if err != nil {43fmt.Println("Error while resolving Unix address: ", err)44}45fmt.Println("Unix address: ", addr)

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