1. go
for the would-be network programmer
@feyeleanor
go for the would-be network programmer 1 http://slides.games-with-brains.net/

2. twitter://@feyeleanor
leanpub://GoNotebook
go for the would-be network programmer http://slides.games-with-brains.net/

3. high voltage
networking
concurrency
cryptography
go for the would-be network programmer http://slides.games-with-brains.net/

4. http
go for the would-be network programmer 4 http://slides.games-with-brains.net/

5. package main
import (
. "fmt"
"net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
http.HandleFunc("/hello", Hello)
if e := http.ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://5 slides.games-with-brains.net/

6. package main
import (
. "fmt"
"net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
http.HandleFunc("/hello", Hello)
if e := http.ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://6 slides.games-with-brains.net/

7. package main
import (
. "fmt"
"net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
http.HandleFunc("/hello", Hello)
if e := http.ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://7 slides.games-with-brains.net/

8. package main
import (
. "fmt"
. "net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
HandleFunc("/hello", Hello)
if e := ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://8 slides.games-with-brains.net/

9. package main
import (
. "fmt"
. ”net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
HandleFunc("/hello", Hello)
if e := ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://9 slides.games-with-brains.net/

10. package main
import (
. "fmt"
. ”net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
HandleFunc("/hello", Hello)
if e := ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://10 slides.games-with-brains.net/

11. package main
import (
. "fmt"
. ”net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
HandleFunc("/hello", Hello)
if e := ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://11 slides.games-with-brains.net/

12. package main
import (
. "fmt"
. ”net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
HandleFunc("/hello", Hello)
if e := ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://12 slides.games-with-brains.net/

13. package main
import (
. "fmt"
. ”net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
HandleFunc("/hello", Hello)
if e := ListenAndServe(ADDRESS, nil); e != nil {
Println(e)
}
}
func Hello(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
}
go for the would-be network programmer http://13 slides.games-with-brains.net/

14. package main
import (
. "fmt"
. "net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
})
ListenAndServe(ADDRESS, nil)
}
go for the would-be network programmer http://14 slides.games-with-brains.net/

15. package main
import (
. "fmt"
. "net/http"
)
const MESSAGE = "hello world"
const ADDRESS = ":1024"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, MESSAGE)
})
ListenAndServe(ADDRESS, nil)
}
go for the would-be network programmer http://15 slides.games-with-brains.net/

16. package main
import (
. "fmt"
. "net/http"
)
const ADDRESS = ":1025"
func main() {
message := "hello world"
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, message)
})
ListenAndServeTLS(ADDRESS, "cert.pem", "key.pem", nil)
}
go for the would-be network programmer http://16 slides.games-with-brains.net/

17. package main
import (
. "fmt"
. "net/http"
)
const ADDRESS = ":1025"
func main() {
message := "hello world"
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, message)
})
ListenAndServeTLS(ADDRESS, "cert.pem", "key.pem", nil)
}
go for the would-be network programmer http://17 slides.games-with-brains.net/

18. package main
import (
. "fmt"
. "net/http"
)
const ADDRESS = ":1025"
func main() {
message := "hello world"
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, message)
})
ListenAndServeTLS(ADDRESS, "cert.pem", "key.pem", nil)
}
go for the would-be network programmer http://18 slides.games-with-brains.net/

19. package main
import (
. "fmt"
. "net/http"
)
const ADDRESS = ":1025"
func main() {
message := "hello world"
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, message)
})
ListenAndServeTLS(ADDRESS, "cert.pem", "key.pem", nil)
}
go for the would-be network programmer http://19 slides.games-with-brains.net/

20. concurrency
go for the would-be network programmer 20 http://slides.games-with-brains.net/

21. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://21 slides.games-with-brains.net/

22. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://22 slides.games-with-brains.net/

23. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://23 slides.games-with-brains.net/

24. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://24 slides.games-with-brains.net/

25. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://25 slides.games-with-brains.net/

26. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://26 slides.games-with-brains.net/

27. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://27 slides.games-with-brains.net/

28. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://28 slides.games-with-brains.net/

29. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
done := make(chan bool)
go func() {
ListenAndServe(":1024", nil)
done <- true
}()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
<- done
}
go for the would-be network programmer http://29 slides.games-with-brains.net/

30. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
Spawn(
func() {
ListenAndServe(":1024", nil)
},
func() {
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
},
)
}
go for the would-be network programmer http://30 slides.games-with-brains.net/

31. package main
import . "fmt"
import . "net/http"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
Spawn(func() {
ListenAndServe(":1024", nil)
})
Spawn(func() {
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
})
}
go for the would-be network programmer http://31 slides.games-with-brains.net/

32. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the would-be network programmer http://32 slides.games-with-brains.net/

33. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the would-be network programmer http://33 slides.games-with-brains.net/

34. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the would-be network programmer http://34 slides.games-with-brains.net/

35. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the would-be network programmer http://35 slides.games-with-brains.net/

36. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the would-be network programmer http://36 slides.games-with-brains.net/

37. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the would-be network programmer http://37 slides.games-with-brains.net/

38. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the would-be network programmer http://38 slides.games-with-brains.net/

39. waitgroups
go for the would-be network programmer 39 http://slides.games-with-brains.net/

40. package main
import . "fmt"
import . "net/http"
import "sync"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {})
var servers sync.WaitGroup
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServe(":1024", nil)
}()
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
}()
servers.Wait()
}
go for the would-be network programmer http://40 slides.games-with-brains.net/

41. package main
import . "fmt"
import . "net/http"
import "sync"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {})
var servers sync.WaitGroup
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServe(":1024", nil)
}()
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
}()
servers.Wait()
}
go for the would-be network programmer http://41 slides.games-with-brains.net/

42. package main
import . "fmt"
import . "net/http"
import "sync"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {})
var servers sync.WaitGroup
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServe(":1024", nil)
}()
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
}()
servers.Wait()
}
go for the would-be network programmer http://42 slides.games-with-brains.net/

43. package main
import . "fmt"
import . "net/http"
import "sync"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {})
var servers sync.WaitGroup
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServe(":1024", nil)
}()
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
}()
servers.Wait()
}
go for the would-be network programmer http://43 slides.games-with-brains.net/

44. package main
import . "fmt"
import . "net/http"
import "sync"
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {})
var servers sync.WaitGroup
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServe(":1024", nil)
}()
servers.Add(1)
go func() {
defer servers.Done()
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
}()
servers.Wait()
}
go for the would-be network programmer http://44 slides.games-with-brains.net/

45. package main
import . "fmt"
import . "net/http"
import "sync"
var servers sync.WaitGroup
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
Spawn(func() {
ListenAndServe(":1024", nil)
})
Spawn(func() {
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
})
servers.Wait()
}
go for the would-be network programmer http://45 slides.games-with-brains.net/

46. package main
import . "fmt"
import . "net/http"
import "sync"
var servers sync.WaitGroup
func main() {
HandleFunc("/hello", func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "hello world")
})
Spawn(func() {
ListenAndServe(":1024", nil)
})
Spawn(func() {
ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil)
})
servers.Wait()
}
go for the would-be network programmer http://46 slides.games-with-brains.net/

47. package main
func Spawn(f ...func()) {
for _, s := range f {
servers.Add(1)
go func(server func()) {
defer servers.Done()
server()
}(s)
}
}
go for the would-be network programmer http://47 slides.games-with-brains.net/

48. package main
func Spawn(f ...func()) {
for _, s := range f {
servers.Add(1)
go func(server func()) {
defer servers.Done()
server()
}(s)
}
}
go for the would-be network programmer http://48 slides.games-with-brains.net/

49. tcp
go for the would-be network programmer 49 http://slides.games-with-brains.net/

50. package main
import . "fmt"
import "net"
func main() {
if listener, e := net.Listen("tcp", ":1024"); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
}(connection)
}
}
}
}
go for the would-be network programmer http://50 slides.games-with-brains.net/

51. package main
import . "fmt"
import "net"
func main() {
if listener, e := net.Listen("tcp", ":1024"); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
}(connection)
}
}
}
}
go for the would-be network programmer http://51 slides.games-with-brains.net/

52. package main
import . "fmt"
import "net"
func main() {
if listener, e := net.Listen("tcp", ":1024"); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
}(connection)
}
}
}
}
go for the would-be network programmer http://52 slides.games-with-brains.net/

53. package main
import . "fmt"
import "net"
func main() {
if listener, e := net.Listen("tcp", ":1024"); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
}(connection)
}
}
}
}
go for the would-be network programmer http://53 slides.games-with-brains.net/

54. package main
import . "fmt"
import "net"
func main() {
if listener, e := net.Listen("tcp", ":1024"); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
}(connection)
}
}
}
}
go for the would-be network programmer http://54 slides.games-with-brains.net/

55. package main
import . "fmt"
import "net"
func main() {
Listen("tcp", ":1024", func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
})
}
func Listen(p, a string, f func(net.Conn)) (e error) {
var listener net.Listener
if listener, e = net.Listen(p, a); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go f(connection)
}
}
}
return
}
go for the would-be network programmer http://55 slides.games-with-brains.net/

56. package main
import . "fmt"
import "net"
func main() {
Listen("tcp", ":1024", func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
})
}
func Listen(p, a string, f func(net.Conn)) (e error) {
var listener net.Listener
if listener, e = net.Listen(p, a); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go f(connection)
}
}
}
return
}
go for the would-be network programmer http://56 slides.games-with-brains.net/

57. package main
import . "fmt"
import "net"
func main() {
Listen("tcp", ":1024", func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
})
}
func Listen(p, a string, f func(net.Conn)) (e error) {
var listener net.Listener
if listener, e = net.Listen(p, a); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go f(connection)
}
}
}
return
}
go for the would-be network programmer http://57 slides.games-with-brains.net/

58. package main
import . "fmt"
import "net"
func main() {
Listen("tcp", ":1024", func(c net.Conn) {
defer c.Close()
Fprintln(c, "hello world")
})
}
func Listen(p, a string, f func(net.Conn)) (e error) {
var listener net.Listener
if listener, e = net.Listen(p, a); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go f(connection)
}
}
}
return
}
go for the would-be network programmer http://58 slides.games-with-brains.net/

59. package main
import "bufio"
import . "fmt"
import "net"
func main() {
if c, e := net.Dial("tcp", ":1024"); e == nil {
defer c.Close()
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
}
}
go for the would-be network programmer http://59 slides.games-with-brains.net/

60. package main
import "bufio"
import . "fmt"
import "net"
func main() {
if c, e := net.Dial("tcp", ":1024"); e == nil {
defer c.Close()
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
}
}
go for the would-be network programmer http://60 slides.games-with-brains.net/

61. package main
import "bufio"
import . "fmt"
import "net"
func main() {
if c, e := net.Dial("tcp", ":1024"); e == nil {
defer c.Close()
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
}
}
go for the would-be network programmer http://61 slides.games-with-brains.net/

62. package main
import "bufio"
import . "fmt"
import "net"
func main() {
if c, e := net.Dial("tcp", ":1024"); e == nil {
defer c.Close()
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
}
}
go for the would-be network programmer http://62 slides.games-with-brains.net/

63. package main
import "bufio"
import . "fmt"
import "net"
func main() {
if c, e := net.Dial("tcp", ":1024"); e == nil {
defer c.Close()
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
}
}
go for the would-be network programmer http://63 slides.games-with-brains.net/

64. package main
import "bufio"
import . "fmt"
import "net"
func main() {
if c, e := net.Dial("tcp", ":1024"); e == nil {
defer c.Close()
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
}
}
go for the would-be network programmer http://64 slides.games-with-brains.net/

65. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial("tcp", ":1024", func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
})
}
go for the would-be network programmer http://65 slides.games-with-brains.net/

66. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial("tcp", ":1024", func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
})
}
func Dial(p, a string, f func(net.Conn)) (e error) {
var c net.Conn
if c, e = net.Dial(p, a); e == nil {
defer c.Close()
f(c)
}
return
}
go for the would-be network programmer http://66 slides.games-with-brains.net/

67. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial("tcp", ":1024", func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
})
}
func Dial(p, a string, f func(net.Conn)) (e error) {
var c net.Conn
if c, e = net.Dial(p, a); e == nil {
defer c.Close()
f(c)
}
return
}
go for the would-be network programmer http://67 slides.games-with-brains.net/

68. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial("tcp", ":1024", func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
})
}
func Dial(p, a string, f func(net.Conn)) (e error) {
var c net.Conn
if c, e = net.Dial(p, a); e == nil {
defer c.Close()
f(c)
}
return
}
go for the would-be network programmer http://68 slides.games-with-brains.net/

69. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial("tcp", ":1024", func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
})
}
func Dial(p, a string, f func(net.Conn)) (e error) {
var c net.Conn
if c, e = net.Dial(p, a); e == nil {
defer c.Close()
f(c)
}
return
}
go for the would-be network programmer http://69 slides.games-with-brains.net/

70. tcp/tls
go for the would-be network programmer 70 http://slides.games-with-brains.net/

71. package main
import "crypto/tls"
import . "fmt"
func main() {
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) {
Fprintln(c, "hello world")
})
}
go for the would-be network programmer http://71 slides.games-with-brains.net/

72. package main
import "crypto/tls"
import . "fmt"
func main() {
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) {
Fprintln(c, "hello world")
})
}
go for the would-be network programmer http://72 slides.games-with-brains.net/

73. package main
import "crypto/tls"
import . "fmt"
func main() {
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) {
Fprintln(c, "hello world")
})
}
go for the would-be network programmer http://73 slides.games-with-brains.net/

74. package main
import "crypto/rand"
import "crypto/tls"
func ConfigTLS(c, k string) (r *tls.Config) {
if cert, e := tls.LoadX509KeyPair(c, k); e == nil {
r = &tls.Config{
Certificates: []tls.Certificate{ cert },
Rand: rand.Reader,
}
}
return
}
go for the would-be network programmer http://74 slides.games-with-brains.net/

75. package main
import "crypto/rand"
import "crypto/tls"
func ConfigTLS(c, k string) (r *tls.Config) {
if cert, e := tls.LoadX509KeyPair(c, k); e == nil {
r = &tls.Config{
Certificates: []tls.Certificate{ cert },
Rand: rand.Reader,
}
}
return
}
go for the would-be network programmer http://75 slides.games-with-brains.net/

76. package main
import "crypto/rand"
import "crypto/tls"
func ConfigTLS(c, k string) (r *tls.Config) {
if cert, e := tls.LoadX509KeyPair(c, k); e == nil {
r = &tls.Config{
Certificates: []tls.Certificate{ cert },
Rand: rand.Reader,
}
}
return
}
go for the would-be network programmer http://76 slides.games-with-brains.net/

77. package main
import "crypto/rand"
import "crypto/tls"
func ConfigTLS(c, k string) (r *tls.Config) {
if cert, e := tls.LoadX509KeyPair(c, k); e == nil {
r = &tls.Config{
Certificates: []tls.Certificate{ cert },
Rand: rand.Reader,
}
}
return
}
go for the would-be network programmer http://77 slides.games-with-brains.net/

78. package main
import "crypto/rand"
import "crypto/tls"
func ConfigTLS(c, k string) (r *tls.Config) {
if cert, e := tls.LoadX509KeyPair(c, k); e == nil {
r = &tls.Config{
Certificates: []tls.Certificate{ cert },
Rand: rand.Reader,
}
}
return
}
go for the would-be network programmer http://78 slides.games-with-brains.net/

79. package main
import "crypto/tls"
func Listen(a string, conf *tls.Config, f func(*tls.Conn)) {
if listener, e := tls.Listen("tcp", a, conf); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c *tls.Conn) {
defer c.Close()
f(c)
}(connection.(*tls.Conn))
}
}
}
}
go for the would-be network programmer http://79 slides.games-with-brains.net/

80. package main
import "crypto/tls"
func Listen(a string, conf *tls.Config, f func(*tls.Conn)) {
if listener, e := tls.Listen("tcp", a, conf); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c *tls.Conn) {
defer c.Close()
f(c)
}(connection.(*tls.Conn))
}
}
}
}
go for the would-be network programmer http://80 slides.games-with-brains.net/

81. package main
import "crypto/tls"
func Listen(a string, conf *tls.Config, f func(*tls.Conn)) {
if listener, e := tls.Listen("tcp", a, conf); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c *tls.Conn) {
defer c.Close()
f(c)
}(connection.(*tls.Conn))
}
}
}
}
go for the would-be network programmer http://81 slides.games-with-brains.net/

82. package main
import "crypto/tls"
func Listen(a string, conf *tls.Config, f func(*tls.Conn)) {
if listener, e := tls.Listen("tcp", a, conf); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c *tls.Conn) {
defer c.Close()
f(c)
}(connection.(*tls.Conn))
}
}
}
}
go for the would-be network programmer http://82 slides.games-with-brains.net/

83. package main
import “crypto/tls"
import "net"
func Listen(a string, conf *tls.Config, f func(net.Conn)) {
if listener, e := tls.Listen("tcp", a, conf); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c net.Conn) {
defer c.Close()
f(c)
}(connection)
}
}
}
}
go for the would-be network programmer http://83 slides.games-with-brains.net/

84. package main
import "crypto/tls"
import "net"
func Listen(a string, conf *tls.Config, f func(net.Conn)) {
if listener, e := tls.Listen("tcp", a, conf); e == nil {
for {
if connection, e := listener.Accept(); e == nil {
go func(c net.Conn) {
defer c.Close()
f(c)
}(connection)
}
}
}
}
go for the would-be network programmer http://84 slides.games-with-brains.net/

85. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
})
}
go for the would-be network programmer http://85 slides.games-with-brains.net/

86. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
})
}
go for the would-be network programmer http://86 slides.games-with-brains.net/

87. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil {
Printf(m)
}
})
}
go for the would-be network programmer http://87 slides.games-with-brains.net/

88. package main
import "crypto/tls"
func ConfigTLS(c, k string) (r *tls.Config) {
if cert, e := tls.LoadX509KeyPair(c, k); e == nil {
r = &tls.Config{
Certificates: []tls.Certificate{ cert },
InsecureSkipVerify: true,
}
}
return
}
go for the would-be network programmer http://88 slides.games-with-brains.net/

89. package main
import "crypto/tls"
func ConfigTLS(c, k string) (r *tls.Config) {
if cert, e := tls.LoadX509KeyPair(c, k); e == nil {
r = &tls.Config{
Certificates: []tls.Certificate{ cert },
InsecureSkipVerify: true,
}
}
return
}
go for the would-be network programmer http://89 slides.games-with-brains.net/

90. package main
import "crypto/tls"
func ConfigTLS(c, k string) (r *tls.Config) {
if cert, e := tls.LoadX509KeyPair(c, k); e == nil {
r = &tls.Config{
Certificates: []tls.Certificate{ cert },
InsecureSkipVerify: true,
}
}
return
}
go for the would-be network programmer http://90 slides.games-with-brains.net/

91. package main
import “crypto/tls"
import "net"
func Dial(a string, conf *tls.Config, f func(net.Conn)) {
if c, e := tls.Dial("tcp", a, conf); e == nil {
defer c.Close()
f(c)
}
}
go for the would-be network programmer http://91 slides.games-with-brains.net/

92. package main
import “crypto/tls"
import "net"
func Dial(a string, conf *tls.Config, f func(net.Conn)) {
if c, e := tls.Dial("tcp", a, conf); e == nil {
defer c.Close()
f(c)
}
}
go for the would-be network programmer http://92 slides.games-with-brains.net/

93. udp
go for the would-be network programmer 93 http://slides.games-with-brains.net/

94. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://94 slides.games-with-brains.net/

95. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn”)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://95 slides.games-with-brains.net/

96. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://96 slides.games-with-brains.net/

97. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://97 slides.games-with-brains.net/

98. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://98 slides.games-with-brains.net/

99. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://99 slides.games-with-brains.net/

100. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://100 slides.games-with-brains.net/

101. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://101 slides.games-with-brains.net/

102. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://102 slides.games-with-brains.net/

103. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://103 slides.games-with-brains.net/

104. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://104 slides.games-with-brains.net/

105. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://105 slides.games-with-brains.net/

106. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://106 slides.games-with-brains.net/

107. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://107 slides.games-with-brains.net/

108. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://108 slides.games-with-brains.net/

109. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://109 slides.games-with-brains.net/

110. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://110 slides.games-with-brains.net/

111. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://111 slides.games-with-brains.net/

112. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://112 slides.games-with-brains.net/

113. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://113 slides.games-with-brains.net/

114. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://114 slides.games-with-brains.net/

115. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://115 slides.games-with-brains.net/

116. package main
import "bufio"
import . "fmt"
import "net"
func main() {
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil {
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil {
Printf("%v", m)
}
}
})
}
func Dial(a string, f func(net.Conn)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
f(conn)
}
}
}
go for the would-be network programmer http://116 slides.games-with-brains.net/

117. rsa
go for the would-be network programmer 117 http://slides.games-with-brains.net/

118. package main
import "net"
func main() {
HELLO_WORLD := []byte("Hello Worldn")
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a)
})
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.ListenUDP("udp", address); e == nil {
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil {
go f(conn, client, b[:n])
}
}
}
}
return
}
go for the would-be network programmer http://118 slides.games-with-brains.net/

119. package main
import . "bytes"
import "crypto/rsa"
import "encoding/gob"
import "net"
func main() {
HELLO_WORLD := []byte("Hello World")
RSA_LABEL := []byte("served")
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil {
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil {
c.WriteToUDP(m, a)
}
}
return
})
}
go for the would-be network programmer http://119 slides.games-with-brains.net/

120. package main
import . "bytes"
import "crypto/rsa"
import "encoding/gob"
import "net"
func main() {
HELLO_WORLD := []byte("Hello World")
RSA_LABEL := []byte("served")
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil {
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil {
c.WriteToUDP(m, a)
}
}
return
})
}
go for the would-be network programmer http://120 slides.games-with-brains.net/

121. package main
import . "bytes"
import "crypto/rsa"
import "encoding/gob"
import "net"
func main() {
HELLO_WORLD := []byte("Hello World")
RSA_LABEL := []byte("served")
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil {
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil {
c.WriteToUDP(m, a)
}
}
return
})
}
go for the would-be network programmer http://121 slides.games-with-brains.net/

122. package main
import . "bytes"
import "crypto/rsa"
import "encoding/gob"
import "net"
func main() {
HELLO_WORLD := []byte("Hello World")
RSA_LABEL := []byte("served")
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil {
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil {
c.WriteToUDP(m, a)
}
}
return
})
}
go for the would-be network programmer http://122 slides.games-with-brains.net/

123. package main
import . "bytes"
import "crypto/rsa"
import "encoding/gob"
import "net"
func main() {
HELLO_WORLD := []byte("Hello World")
RSA_LABEL := []byte("served")
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil {
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil {
c.WriteToUDP(m, a)
}
}
return
})
}
go for the would-be network programmer http://123 slides.games-with-brains.net/

124. package main
import . "bytes"
import "crypto/rsa"
import "encoding/gob"
import "net"
func main() {
HELLO_WORLD := []byte("Hello World")
RSA_LABEL := []byte("served")
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil {
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil {
c.WriteToUDP(m, a)
}
}
return
})
}
go for the would-be network programmer http://124 slides.games-with-brains.net/

125. package main
import . "bytes"
import "crypto/rsa"
import "encoding/gob"
import "net"
func main() {
HELLO_WORLD := []byte("Hello World")
RSA_LABEL := []byte("served")
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil {
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil {
c.WriteToUDP(m, a)
}
}
return
})
}
go for the would-be network programmer http://125 slides.games-with-brains.net/

126. package main
import . "bytes"
import "crypto/rsa"
import "encoding/gob"
import "net"
func main() {
HELLO_WORLD := []byte("Hello World")
RSA_LABEL := []byte("served")
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil {
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil {
c.WriteToUDP(m, a)
}
}
return
})
}
go for the would-be network programmer http://126 slides.games-with-brains.net/

127. package main
import "crypto/rand"
import "crypto/rsa"
import "crypto/sha1"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) {
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l)
}
go for the would-be network programmer http://127 slides.games-with-brains.net/

128. package main
import "crypto/rand"
import "crypto/rsa"
import "crypto/sha1"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) {
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l)
}
go for the would-be network programmer http://128 slides.games-with-brains.net/

129. package main
import "crypto/rand"
import "crypto/rsa"
import "crypto/sha1"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) {
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l)
}
go for the would-be network programmer http://129 slides.games-with-brains.net/

130. package main
import "crypto/rand"
import "crypto/rsa"
import "crypto/sha1"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) {
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l)
}
go for the would-be network programmer http://130 slides.games-with-brains.net/

131. package main
import "crypto/rand"
import "crypto/rsa"
import "crypto/sha1"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) {
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l)
}
go for the would-be network programmer http://131 slides.games-with-brains.net/

132. package main
import "crypto/rsa"
import . "fmt"
import "net"
func main() {
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil {
if m, e := Decrypt(k, m, []byte("served")); e == nil {
Println(string(m))
}
}
})
}
go for the would-be network programmer http://132 slides.games-with-brains.net/

133. package main
import "crypto/rsa"
import . "fmt"
import "net"
func main() {
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil {
if m, e := Decrypt(k, m, []byte("served")); e == nil {
Println(string(m))
}
}
})
}
go for the would-be network programmer http://133 slides.games-with-brains.net/

134. package main
import "crypto/rsa"
import . "fmt"
import "net"
func main() {
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil {
if m, e := Decrypt(k, m, []byte("served")); e == nil {
Println(string(m))
}
}
})
}
go for the would-be network programmer http://134 slides.games-with-brains.net/

135. package main
import "crypto/rand"
import "crypto/rsa"
import "crypto/sha1"
func Decrypt(key *rsa.PrivateKey, m, l []byte) ([]byte, error) {
return rsa.DecryptOAEP(sha1.New(), rand.Reader, key, m, l)
}
go for the would-be network programmer http://135 slides.games-with-brains.net/

136. package main
import "crypto/rsa"
import . "fmt"
import "net"
func main() {
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil {
if m, e := Decrypt(k, m, []byte("served")); e == nil {
Println(string(m))
}
}
})
}
go for the would-be network programmer http://136 slides.games-with-brains.net/

137. package main
import "net"
func ReadStream(conn *net.UDPConn) (r []byte, e error) {
m := make([]byte, 1024)
var n int
if n, e = conn.Read(m); e == nil {
r = m[:n]
}
return
}
go for the would-be network programmer http://137 slides.games-with-brains.net/

138. package main
import "net"
func ReadStream(conn *net.UDPConn) (r []byte, e error) {
m := make([]byte, 1024)
var n int
if n, e = conn.Read(m); e == nil {
r = m[:n]
}
return
}
go for the would-be network programmer http://138 slides.games-with-brains.net/

139. package main
import "net"
func ReadStream(conn *net.UDPConn) (r []byte, e error) {
m := make([]byte, 1024)
var n int
if n, e = conn.Read(m); e == nil {
r = m[:n]
}
return
}
go for the would-be network programmer http://139 slides.games-with-brains.net/

140. package main
import "net"
func ReadStream(conn *net.UDPConn) (r []byte, e error) {
m := make([]byte, 1024)
var n int
if n, e = conn.Read(m); e == nil {
r = m[:n]
}
return
}
go for the would-be network programmer http://140 slides.games-with-brains.net/

141. package main
import "crypto/rsa"
import . "fmt"
import "net"
func main() {
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil {
if m, e := Decrypt(k, m, []byte("served")); e == nil {
Println(string(m))
}
}
})
}
go for the would-be network programmer http://141 slides.games-with-brains.net/

142. package main
import "crypto/rsa"
import . "fmt"
import "net"
func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) {
if k, e := LoadPrivateKey(file); e == nil {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
SendKey(conn, k.PublicKey, func() {
f(conn, k)
})
}
}
}
}
go for the would-be network programmer http://142 slides.games-with-brains.net/

143. package main
import "crypto/rsa"
import . "fmt"
import "net"
func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) {
if k, e := LoadPrivateKey(file); e == nil {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
SendKey(conn, k.PublicKey, func() {
f(conn, k)
})
}
}
}
}
go for the would-be network programmer http://143 slides.games-with-brains.net/

144. package main
import "crypto/rsa"
import . "fmt"
import "net"
func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) {
if k, e := LoadPrivateKey(file); e == nil {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
SendKey(conn, k.PublicKey, func() {
f(conn, k)
})
}
}
}
}
go for the would-be network programmer http://144 slides.games-with-brains.net/

145. package main
import "crypto/rsa"
import "crypto/x509"
import "encoding/pem"
import "io/ioutil"
func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) {
if file, e := ioutil.ReadFile(file); e == nil {
if block, _ := pem.Decode(file); block != nil {
if block.Type == "RSA PRIVATE KEY" {
r, e = x509.ParsePKCS1PrivateKey(block.Bytes)
}
}
}
return
}
go for the would-be network programmer http://145 slides.games-with-brains.net/

146. package main
import "crypto/rsa"
import "crypto/x509"
import "encoding/pem"
import "io/ioutil"
func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) {
if file, e := ioutil.ReadFile(file); e == nil {
if block, _ := pem.Decode(file); block != nil {
if block.Type == "RSA PRIVATE KEY" {
r, e = x509.ParsePKCS1PrivateKey(block.Bytes)
}
}
}
return
}
go for the would-be network programmer http://146 slides.games-with-brains.net/

147. package main
import "crypto/rsa"
import "crypto/x509"
import "encoding/pem"
import "io/ioutil"
func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) {
if file, e := ioutil.ReadFile(file); e == nil {
if block, _ := pem.Decode(file); block != nil {
if block.Type == "RSA PRIVATE KEY" {
r, e = x509.ParsePKCS1PrivateKey(block.Bytes)
}
}
}
return
}
go for the would-be network programmer http://147 slides.games-with-brains.net/

148. package main
import "crypto/rsa"
import "crypto/x509"
import "encoding/pem"
import "io/ioutil"
func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) {
if file, e := ioutil.ReadFile(file); e == nil {
if block, _ := pem.Decode(file); block != nil {
if block.Type == "RSA PRIVATE KEY" {
r, e = x509.ParsePKCS1PrivateKey(block.Bytes)
}
}
}
return
}
go for the would-be network programmer http://148 slides.games-with-brains.net/

149. package main
import "crypto/rsa"
import "crypto/x509"
import "encoding/pem"
import "io/ioutil"
func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) {
if file, e := ioutil.ReadFile(file); e == nil {
if block, _ := pem.Decode(file); block != nil {
if block.Type == "RSA PRIVATE KEY" {
r, e = x509.ParsePKCS1PrivateKey(block.Bytes)
}
}
}
return
}
go for the would-be network programmer http://149 slides.games-with-brains.net/

150. package main
import "crypto/rsa"
import "crypto/x509"
import "encoding/pem"
import "io/ioutil"
func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) {
if file, e := ioutil.ReadFile(file); e == nil {
if block, _ := pem.Decode(file); block != nil {
if block.Type == "RSA PRIVATE KEY" {
r, e = x509.ParsePKCS1PrivateKey(block.Bytes)
}
}
}
return
}
go for the would-be network programmer http://150 slides.games-with-brains.net/

151. package main
import "crypto/rsa"
import . "fmt"
import "net"
func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) {
if k, e := LoadPrivateKey(file); e == nil {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
SendKey(conn, k.PublicKey, func() {
f(conn, k)
})
}
}
}
}
go for the would-be network programmer http://151 slides.games-with-brains.net/

152. package main
import "crypto/rsa"
import . "fmt"
import "net"
func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) {
if k, e := LoadPrivateKey(file); e == nil {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
SendKey(conn, k.PublicKey, func() {
f(conn, k)
})
}
}
}
}
go for the would-be network programmer http://152 slides.games-with-brains.net/

153. package main
import "crypto/rsa"
import . "fmt"
import "net"
func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) {
if k, e := LoadPrivateKey(file); e == nil {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
SendKey(conn, k.PublicKey, func() {
f(conn, k)
})
}
}
}
}
go for the would-be network programmer http://153 slides.games-with-brains.net/

154. package main
import "bytes"
import “crypto/rsa"
import "encoding/gob"
import "net"
func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) {
var b bytes.Buffer
if e := gob.NewEncoder(&b).Encode(k); e == nil {
if _, e = c.Write(b.Bytes()); e == nil {
f()
}
}
}
go for the would-be network programmer http://154 slides.games-with-brains.net/

155. package main
import "bytes"
import “crypto/rsa"
import "encoding/gob"
import "net"
func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) {
var b bytes.Buffer
if e := gob.NewEncoder(&b).Encode(k); e == nil {
if _, e = c.Write(b.Bytes()); e == nil {
f()
}
}
}
go for the would-be network programmer http://155 slides.games-with-brains.net/

156. package main
import "bytes"
import “crypto/rsa"
import "encoding/gob"
import "net"
func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) {
var b bytes.Buffer
if e := gob.NewEncoder(&b).Encode(k); e == nil {
if _, e = c.Write(b.Bytes()); e == nil {
f()
}
}
}
go for the would-be network programmer http://156 slides.games-with-brains.net/

157. package main
import "crypto/rsa"
import . "fmt"
import "net"
func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) {
if k, e := LoadPrivateKey(file); e == nil {
if address, e := net.ResolveUDPAddr("udp", a); e == nil {
if conn, e := net.DialUDP("udp", nil, address); e == nil {
defer conn.Close()
SendKey(conn, k.PublicKey, func() {
f(conn, k)
})
}
}
}
}
go for the would-be network programmer http://157 slides.games-with-brains.net/

158. http://golang.org/
go for the would-be network programmer http://158 slides.games-with-brains.net/

159. twitter://#golang
go for the would-be network programmer http://159 slides.games-with-brains.net/