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Writing code that might be useful

Benjamin Cane madflojo

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Writing code that might be useful
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@madflojo
madflojo / http-middleware.go
Created August 1, 2021 03:42
httprouter Article - Hello World with Middleware
package main
import (
"fmt"
"github.com/julienschmidt/httprouter"
"log"
"net/http"
)
// handler is a basic HTTP handler that prints hello world.
@madflojo
madflojo / http-middleware-pprof.go
Created August 4, 2021 02:42
httprouter Article - Registering PProf Index
package main
import (
"fmt"
"github.com/julienschmidt/httprouter"
"log"
"net/http"
"net/http/pprof"
)
@madflojo
madflojo / http-middleware-pprof-full.go
Created August 5, 2021 02:48
httprouter Article - Middleware with PProf full
package main
import (
"fmt"
"github.com/julienschmidt/httprouter"
"log"
"net/http"
"net/http/pprof"
)
@madflojo
madflojo / main.go
Last active September 3, 2021 02:23
SetLinger Article - Basic TCP Server
package main
import (
"log"
"net"
"time"
)
func main() {
// Create a listener
@madflojo
madflojo / main-linger.go
Created September 1, 2021 14:42
SetLinger Article - TCP Server with SetLinger
package main
import (
"log"
"net"
"time"
)
func main() {
// Create a listener
@madflojo
madflojo / client.go
Created September 1, 2021 14:43
SetLinger Article - TCP Client
package main
import (
"log"
"net"
)
func main() {
// Open a TCP Session to Server
c, err := net.Dial("tcp", "localhost:9000")
@madflojo
madflojo / server_logs.console
Created September 5, 2021 18:17
Set Linger Article - First Server Logs
$ go run main.go
2021/09/05 11:17:12 TCP Session Open
2021/09/05 11:17:27 Error reading TCP Session: read tcp [::1]:9000->[::1]:50770: use of closed network connection
@madflojo
madflojo / client-output.console
Created September 5, 2021 18:22
Set Linger - First Client Output
$ go run client.go
2021/09/05 11:17:12 TCP Session Open
2021/09/05 11:17:27 Error from TCP Session: EOF
exit status 1
@madflojo
madflojo / tcpdump.console
Created September 5, 2021 18:39
Set Linger Article - tcpdump first try
# tcpdump -n -vvv -i lo0 port 9000
tcpdump: listening on lo0, link-type NULL (BSD loopback), capture size 262144 bytes
11:28:39.808360 IP6 (flowlabel 0x90100, hlim 64, next-header TCP (6) payload length: 44) ::1.50796 > ::1.9000: Flags [S], cksum 0x0034 (incorrect -> 0x8d95), seq 1062602566, win 65535, options [mss 16324,nop,wscale 6,nop,nop,TS val 316484679 ecr 0,sackOK,eol], length 0
11:28:39.808429 IP6 (flowlabel 0x30a00, hlim 64, next-header TCP (6) payload length: 44) ::1.9000 > ::1.50796: Flags [S.], cksum 0x0034 (incorrect -> 0x9e6d), seq 3264678097, ack 1062602567, win 65535, options [mss 16324,nop,wscale 6,nop,nop,TS val 3908319929 ecr 316484679,sackOK,eol], length 0
11:28:39.808445 IP6 (flowlabel 0x90100, hlim 64, next-header TCP (6) payload length: 32) ::1.50796 > ::1.9000: Flags [.], cksum 0x0028 (incorrect -> 0xff6a), seq 1, ack 1, win 6371, options [nop,nop,TS val 316484679 ecr 3908319929], length 0
11:28:39.808457 IP6 (flowlabel 0x30a00, hlim 64, next-header TCP (6) payload length: 32) ::1.9000
@madflojo
madflojo / tcpdump2.console
Created September 5, 2021 21:04
Set Linger Article - TCP Dump part 2
14:02:53.050249 IP6 (flowlabel 0xc0d00, hlim 64, next-header TCP (6) payload length: 44) ::1.51212 > ::1.9000: Flags [S], cksum 0x0034 (incorrect -> 0x892f), seq 1824373810, win 65535, options [mss 16324,nop,wscale 6,nop,nop,TS val 4087507955 ecr 0,sackOK,eol], length 0
14:02:53.050421 IP6 (flowlabel 0x90900, hlim 64, next-header TCP (6) payload length: 44) ::1.9000 > ::1.51212: Flags [S.], cksum 0x0034 (incorrect -> 0x128e), seq 924074817, ack 1824373811, win 65535, options [mss 16324,nop,wscale 6,nop,nop,TS val 3688308835 ecr 4087507955,sackOK,eol], length 0
14:02:53.050495 IP6 (flowlabel 0xc0d00, hlim 64, next-header TCP (6) payload length: 32) ::1.51212 > ::1.9000: Flags [.], cksum 0x0028 (incorrect -> 0x738b), seq 1, ack 1, win 6371, options [nop,nop,TS val 4087507955 ecr 3688308835], length 0
14:02:53.050541 IP6 (flowlabel 0x90900, hlim 64, next-header TCP (6) payload length: 32) ::1.9000 > ::1.51212: Flags [.], cksum 0x0028 (incorrect -> 0x738b), seq 1, ack 1, win 6371, options [nop,nop,TS val 36883088