open-dev

Contents

• open-dev
  • Contents
  • Let's Go
  • Gin Web Framework
    • API Examples
  • Queue
    • Kafka
      • Consumer Advanced
      • Producer Advanced
      • Example
    • RabbitMQ
      • Code Example
  • Redis
    • Rate Limit
    • redis pub-sub
  • Golang Usecase
    • Strategy Management Connect database
    • Resize Image
    • Context
    • RSA
    • ecdsa algorithm
    • concurrency
      • pattern
  • Serverless Framework
  • terraform
    • sqs
    • aws-apigw
  • Aws
    • Textract
    • Lambda
    • S3
  • Performances
    • Standard
  • http
    • reuse-http
  • tls
    • tls-base64
  • cryto
    • most commonly
  • Contact:
  • Give a Star! ⭐
  • Buy me a coffee

Let's Go

• build web application golang
• link: https://github.com/ducnpdev/open-dev/tree/master/letgo

Gin Web Framework

API Examples

• source code in forder gin-web-framework

Queue

Kafka

Consumer Advanced

• read document vietnamese: https://github.com/ducnpdev/open-dev/blob/master/kafka/README_VI.md#consumer-advanced

Producer Advanced

• read document vietnamese: https://github.com/ducnpdev/open-dev/blob/master/kafka/README_VI.md#topic-advanced

Example

• read article install kafka: https://github.com/ducnpdev/open-dev/tree/master/kafka

RabbitMQ

Code Example

• read source: https://github.com/ducnpdev/golang-rabbitmq

Redis

• read article install redis: https://github.com/ducnpdev/open-dev/tree/master/redis

Rate Limit

• read article lear more rate-limit: https://viblo.asia/p/golang-ratelimit-la-gi-su-dung-ByEZkn3qKQ0

redis pub-sub

• pub-sub code example: https://github.com/ducnpdev/open-dev/tree/master/redis/pubsub

Golang Usecase

Strategy Management Connect database

• link: https://viblo.asia/p/golang-chien-luoc-quan-ly-ket-noi-database-thong-qua-gorm-zXRJ8r6dVGq

Resize Image

• edit size of image from base64: https://github.com/ducnpdev/open-dev/tree/master/usecase#resize-image

Context

• Handle context timeout: https://github.com/ducnpdev/open-dev/blob/master/usecase/context/timeout.go

RSA

• Encrypt Decrypt Data, code example: https://github.com/ducnpdev/open-dev/blob/master/usecase/rsa/REAME.md

ecdsa algorithm

• This is code example: https://github.com/ducnpdev/open-dev/blob/master/usecase/ecdsa/ecdsa.go

concurrency

• source-code example:

pattern

• 7 pattern thiết yếu trong golang: https://github.com/ducnpdev/open-dev/tree/master/concurrency/patterns

Serverless Framework

terraform

sqs

• create sqs simple: https://github.com/ducnpdev/open-dev/tree/master/terraform/apps/sqs

aws-apigw

• this is code: https://github.com/ducnpdev/open-dev/tree/master/terraform/apps/apigw

Aws

Textract

• code example use aws textract identity: https://docs.aws.amazon.com/textract/index.html
• code: https://github.com/ducnpdev/open-dev/blob/master/aws/textract/main.go

Lambda

• Demo simple lambda function: https://github.com/ducnpdev/open-dev/tree/master/aws/lambda
• Crud with postgres, link source: https://github.com/ducnpdev/open-dev/tree/master/aws/lambda/crud
• build docker images: https://aws.amazon.com/blogs/compute/migrating-aws-lambda-functions-from-the-go1-x-runtime-to-the-custom-runtime-on-amazon-linux-2/

S3

• link code examle: https://github.com/ducnpdev/open-dev/tree/master/aws/s3

Performances

Standard

• Test simple of function return error: https://opendev.hashnode.dev/golang-test-performance-function-standard-1
• Test convert string to int of 3 function: https://opendev.hashnode.dev/golang-test-performance-function-standard-1

http

reuse-http

package main

import (
	"context"
	"io"
	"io/ioutil"
	"log"
	"net/http"
	"net/http/httptrace"
)

func main() {
	Reuse()
	//
	NonReuse()
}

// NonReuse, not reuse http
func NonReuse() {
	// client trace to log whether the request's underlying tcp connection was re-used
	clientTrace := &httptrace.ClientTrace{
		GotConn: func(info httptrace.GotConnInfo) {
			log.Printf("conn was reused: %t", info.Reused)
		},
	}
	traceCtx := httptrace.WithClientTrace(context.Background(), clientTrace)

	// 1st request
	req, err := http.NewRequestWithContext(traceCtx, http.MethodGet, "http://example.com", nil)
	if err != nil {
		log.Fatal(err)
	}
	_, err = http.DefaultClient.Do(req)
	if err != nil {
		log.Fatal(err)
	}
	// 2nd request
	req, err = http.NewRequestWithContext(traceCtx, http.MethodGet, "http://example.com", nil)
	if err != nil {
		log.Fatal(err)
	}
	_, err = http.DefaultClient.Do(req)
	if err != nil {
		log.Fatal(err)
	}
}

// Reuse, reuse http client
func Reuse() {
	var (
		err error
	)
	// client trace to log whether the request's underlying tcp connection was re-used
	clientTrace := &httptrace.ClientTrace{
		GotConn: func(info httptrace.GotConnInfo) {
			log.Printf("conn was reused: %t", info.Reused)
		},
	}
	traceCtx := httptrace.WithClientTrace(context.Background(), clientTrace)

	// 1st request
	req, err := http.NewRequestWithContext(traceCtx, http.MethodGet, "http://example.com", nil)
	if err != nil {
		log.Fatal(err)
	}
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		log.Fatal(err)
	}
	if _, err := io.Copy(ioutil.Discard, res.Body); err != nil {
		log.Fatal(err)
	}
	res.Body.Close()
	// 2nd request
	req, err = http.NewRequestWithContext(traceCtx, http.MethodGet, "http://example.com", nil)
	if err != nil {
		log.Fatal(err)
	}
	_, err = http.DefaultClient.Do(req)
	if err != nil {
		log.Fatal(err)
	}
}

tls

tls-base64

• convert file key and file pem to base64
• link: https://github.com/ducnpdev/open-dev/tree/master/tls/base64parse

cryto

most commonly

• link: https://github.com/ducnpdev/open-dev/tree/master/usecase/crypto-demo

Contact:

• facebook: https://www.facebook.com/phucducdev/
• gmail: [email protected] or [email protected]
• linkedin: https://www.linkedin.com/in/phucducktpm/
• hashnode: https://hashnode.com/@OpenDev
• telegram: https://t.me/OpenDevGolang

Give a Star! ⭐

If you like or are using this project to learn or start your solution, please give it a star. Thanks!

Buy me a coffee