Ankur ankur22
ankur22
/ iptables.sh
Last active
January 1, 2023 03:16
This lists rules to lock down network with iptables to the specified ports
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| #!/bin/bash | |
| # OpenVPN Server | |
| iptables -t nat -I POSTROUTING 1 -s 10.8.0.0/24 -o eth0 -j MASQUERADE | |
| iptables -I INPUT 1 -i tun0 -j ACCEPT | |
| iptables -I FORWARD 1 -i eth0 -o tun0 -j ACCEPT | |
| iptables -I FORWARD 1 -i tun0 -o eth0 -j ACCEPT | |
| iptables -I INPUT 1 -i eth0 -p udp --dport 1194 -j ACCEPT | |
| iptables -I OUTPUT 1 -o eth0 -p udp --sport 1194 -j ACCEPT |
ankur22
/ isoTime.go
Created
March 7, 2022 10:50
Parse an iso timestamp from json straight into a time type
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| package main | |
| import ( | |
| "encoding/json" | |
| "fmt" | |
| "time" | |
| ) | |
| type someType struct { | |
| Time *time.Time `json:"time"` |
ankur22
/ set_timeout.go
Created
March 4, 2022 11:11
Checking whether the underlying client and context have a context and setting one on the context if no timeout set in either
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| // Set a timeout of 10secs if no timeout in the underlying | |
| // http client and no timeout set in the context. | |
| _, ok := ctx.Deadline() | |
| if c.c.Timeout == 0 && !ok { | |
| var cancel context.CancelFunc | |
| ctx, cancel = context.WithTimeout(ctx, time.Second*10) | |
| defer cancel() | |
| } |
ankur22
/ goRESTHelloWorldMain.go
Last active
April 24, 2021 11:16
Hello world for rest service in go
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| package main | |
| import "fmt" | |
| func main() { | |
| fmt.Println("Hello World") | |
| } |
ankur22
/ structEmbeddingSameFields.go
Created
May 30, 2020 14:21
Example of embedded structs with overlapping string fields
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| type logger struct { | |
| s string | |
| s2 string | |
| } | |
| func (l *logger) do(in string) { | |
| log.Println(in) | |
| } | |
| type checker struct { |
ankur22
/ structEmbeddingOwnField.go
Created
May 30, 2020 14:06
Example of an embedded struct with its own field too
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| type loggerAndChecker struct { | |
| *logger | |
| *checker | |
| s string | |
| } |
ankur22
/ interfaceEmbeddingMoreFunc.go
Created
May 30, 2020 14:02
Example of a embedded interface which defines its own functions too
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| type doerAndValidator interface { | |
| doer | |
| validator | |
| doSomething(string) | |
| } |
ankur22
/ structEmbeddingImplSameFunc.go
Created
May 30, 2020 13:53
Example of struct embedding where there's two functions with same name, so we override that function
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| type logger struct{} | |
| func (l *logger) do(in string) { | |
| if l.validate(in) { | |
| log.Println(in) | |
| } | |
| } | |
| func (l *logger) validate(in string) bool { | |
| if len(in) == 0 { |
ankur22
/ structEmbeddingSameFunc.go
Last active
May 30, 2020 13:45
Example of a embedded structs where the structs implement the same func
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| type logger struct{} | |
| func (l *logger) do(in string) { | |
| if l.validate(in) { | |
| log.Println(in) | |
| } | |
| } | |
| func (l *logger) validate(in string) bool { | |
| if len(in) == 0 { |
ankur22
/ notStructEmbedding.go
Created
May 30, 2020 13:36
An example of a type which does not embed the struct but declares fields instead
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| type loggerAndChecker struct { | |
| l *logger | |
| c *checker | |
| } | |
| func main() { | |
| var lc loggerAndChecker | |
| in := "Hello World" | |
| if lc.c.validate(in) { | |
| lc.l.do(in) |
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