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https://github.com/jeffdecola/my-go-examples

A place to keep my go examples.
https://github.com/jeffdecola/my-go-examples

api blockchain concourse cryptography go go-examples golang gomock nats oauth2 protobuf protocol-buffers restful-api snippets syntax tcp-server web-server webserver

Last synced: about 1 year ago
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A place to keep my go examples.

Awesome Lists containing this project

README 

          
# MY GO EXAMPLES



[![jeffdecola.com](https://img.shields.io/badge/website-jeffdecola.com-blue)](https://jeffdecola.com)

[![MIT License](https://img.shields.io/:license-mit-blue.svg)](https://jeffdecola.mit-license.org)

[![Go Reference](https://pkg.go.dev/badge/github.com/JeffDeCola/my-go-examples.svg)](https://pkg.go.dev/github.com/JeffDeCola/my-go-examples)

[![Go Report Card](https://goreportcard.com/badge/github.com/JeffDeCola/my-go-examples)](https://goreportcard.com/report/github.com/JeffDeCola/my-go-examples)



_A place to keep my go examples._



Table of Contents



* [ARCHITECTURES](https://github.com/JeffDeCola/my-go-examples#architectures)

  * BLOCKCHAIN

  * SCRAPING

* [CGO](https://github.com/JeffDeCola/my-go-examples#cgo)

  * C CODE

* [CLIENT/SERVER](https://github.com/JeffDeCola/my-go-examples#clientserver)

  * gRPC

  * HTTP

  * TCP/IP

* [CLOUD SERVICE PROVIDERS](https://github.com/JeffDeCola/my-go-examples#cloud-service-providers)

  * GOOGLE CLOUD PLATFORM

  * MICROSOFT AZURE

* [COMMON GO](https://github.com/JeffDeCola/my-go-examples#common-go)

  * ERROR REPORTING

  * FLAGS

  * LOGGING

  * MY GENERIC GO TEMPLATE

  * TESTING

* [CRYPTOGRAPHY](https://github.com/JeffDeCola/my-go-examples#cryptography)

  * ASYMMETRIC CRYPTOGRAPHY

  * HASHING

  * SYMMETRIC CRYPTOGRAPHY

* [DATABASES](https://github.com/JeffDeCola/my-go-examples#databases)

  * NON-RELATIONAL

  * RELATIONAL

* [FUNCTIONS, METHODS AND INTERFACES](https://github.com/JeffDeCola/my-go-examples#functions-methods-and-interfaces)

  * FUNCTIONS

  * METHODS

  * INTERFACES

* [GO RUNTIME](https://github.com/JeffDeCola/my-go-examples#go-runtime)

  * GOROUTINES

  * INTERACT GO RUNTIME

  * INTERACT HOST OS

* [INPUT/OUTPUT](https://github.com/JeffDeCola/my-go-examples#inputoutput)

  * IO READER

  * IO WRITER

* [IN-PROCESS COMMUNICATION](https://github.com/JeffDeCola/my-go-examples#in-process-communication)

  * SHARED MEMORY

  * MESSAGE PASSING

* [INTER-PROCESS COMMUNICATION (IPC)](https://github.com/JeffDeCola/my-go-examples#inter-process-communication-ipc)

  * SHARED MEMORY

  * MESSAGE PASSING

* [IoT](https://github.com/JeffDeCola/my-go-examples#iot)

  * RASPBERRY PI

* [MODULES AND PACKAGES](https://github.com/JeffDeCola/my-go-examples#modules-and-packages)

  * LOCAL PACKAGES

  * REMOTE PACKAGES

* [STANDARD GO PACKAGES](https://github.com/JeffDeCola/my-go-examples#standard-go-packages)



Documentation and Reference



* [go](https://github.com/JeffDeCola/my-cheat-sheets/tree/master/software/development/languages/go-cheat-sheet)

* [go standard library](https://pkg.go.dev/std)

* [my-go-packages](https://github.com/JeffDeCola/my-go-packages)

* [my-go-tools](https://github.com/JeffDeCola/my-go-tools)

* This repos

  [github webpage](https://jeffdecola.github.io/my-go-examples/)

  _built with

  [concourse](https://github.com/JeffDeCola/my-go-examples/blob/master/ci-README.md)_



## ARCHITECTURES



* BLOCKCHAIN



  * [bitcoin-ledger](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/bitcoin-ledger)



    _Demonstrates a bitcoin ledger in a blockchain using the

    unspent transaction output model._



  * [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey)



    _Create a bitcoin address from your ecdsa public key

    using the

    [crypto/ecdsa](https://pkg.go.dev/crypto/ecdsa)

    standard package._



  * [single-node-blockchain-with-REST](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/single-node-blockchain-with-REST)



    _A simple single node sha256 blockchain with a REST JSON API

    (to view (GET) the blockchain and add (POST) a block)._



* WEB SCRAPING



  * _[web scrape twitter for ???]_



## CGO



* C CODE



  * [simple-c-code](https://github.com/JeffDeCola/my-go-examples/tree/master/cgo/c-code/simple-c-code)



    _A very simple example to show you how to write a c function in go._



  * [simple-c-code-using-stdio](https://github.com/JeffDeCola/my-go-examples/tree/master/cgo/c-code/simple-c-code-using-stdio)



    _A c function in go using stdio.h for printf._



## CLIENT/SERVER



* gRPC



  * _Coming soon._



* HTTP



  * _Coming soon._



* TCP/IP



  * _Coming soon._



## CLOUD SERVICE PROVIDERS



* GOOGLE CLOUD PLATFORM



  * _Coming soon._



* MICROSOFT AZURE



  * _Coming soon._



## COMMON GO



* ERROR REPORTING



  * [error-example](https://github.com/JeffDeCola/my-go-examples/tree/master/common-go/error-reporting/error-example)



  _Error Handling using the standard

  [errors](https://pkg.go.dev/errors)

  standard package._



* FLAGS



  * [flags](https://github.com/JeffDeCola/my-go-examples/tree/master/common-go/flags/flags)



    _The

    [flag](https://pkg.go.dev/flag)

    standard package makes it easy to implement command-line flag parsing._



* LOGGING



  * [jeffs-logger](https://github.com/JeffDeCola/my-go-examples/tree/master/common-go/logging/jeffs-logger)



    _Logging using my

    [github.com/JeffDeCola/my-go-packages/golang/logger](https://github.com/JeffDeCola/my-go-packages/tree/master/golang/logger)

    which uses the structured logging

    [log/slog](https://pkg.go.dev/log/slog)

    standard package._



* MY GENERIC GO TEMPLATE



  * [jeffs-basic-go-template](https://github.com/JeffDeCola/my-go-examples/tree/master/common-go/my-generic-go-template/jeffs-basic-go-template)



    _A simple go template with flags, logging & error handling._



* TESTING



  * _Coming soon._



## CRYPTOGRAPHY



* ASYMMETRIC CRYPTOGRAPHY

  _(Great for digital signatures (verify sender) and receiving encrypted data)_



  * _Coming soon._



* HASHING

  _(Great for getting fingerprints)_



  * _Coming soon._



* SYMMETRIC CRYPTOGRAPHY

  _(Using the same key to encrypt and decrypt)_



  * _Coming soon._



## DATABASES



* NON-RELATIONAL



  * _Coming soon._



* RELATIONAL



  * _Coming soon._



## FUNCTIONS, METHODS AND INTERFACES



* FUNCTIONS



  * [functions](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/functions/functions)



    _Using functions to calculate the area of a rectangle and circle._



  * [functions-pointers-arguments](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/functions/functions-pointers-arguments)



    _Using functions to calculate the area of a rectangle and circle

    by passing pointers._



* METHODS



  * [methods](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/methods/methods)



    _Using methods to calculate the area of a rectangle and circle._



  * [methods-pointers-arguments](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/methods/methods-pointers-arguments)



    _Using methods to calculate the area of a rectangle and circle

    by passing pointers._



  * [methods-pointers-receivers](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/methods/methods-pointers-receivers)



    _Using methods to calculate the area of a rectangle and circle

    by passing pointers and using pointer receivers._



* INTERFACES



  * [interfaces](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/interfaces/interfaces)



    _Using an interface to calculate the area of a rectangle and circle._



  * [interfaces-pointers-arguments](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/interfaces/interfaces-pointers-arguments)



    _Using an interface to calculate the area of a rectangle and circle

    by passing pointers._



  * [interfaces-pointer-receivers](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/interfaces/interfaces-pointers-receivers)



    _Using an interface to calculate the area of a rectangle and circle

    by passing pointers and using pointer receivers._



  * [shapes-package](https://github.com/JeffDeCola/my-go-examples/tree/master/functions-methods-interfaces/interfaces/shapes-package)



    _Using an interface to calculate and manipulate simple 2D and 3D geometric shapes._



## GO RUNTIME



* GO ROUTINES



  * [goroutines-multi-core](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/goroutines/goroutines-multi-core)



    _Concurrency across multiples cores.  You can play around with workers,

    threads, cpus/cores and nice to find the fastest performance.

    It will find the total number of prime numbers within a range.

    Lightweight goroutines are amazing._



  * [goroutines-waitgroup](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/goroutines/goroutines-waitgroup)



    _Concurrency using a waitgroup (waiting for a collection of goroutines to finish)._



  * [goroutines-worker-pools](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/goroutines/goroutines-worker-pools)



    _Concurrency using worker pools._



* INTERACT GO RUNTIME



  * [simple-go-runtime-interactions](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/interact-go-runtime/simple-go-runtime-interactions)



    _A few go runtime interactions using the

    [runtime](https://pkg.go.dev/runtime)

    standard package._



* INTERACT HOST OS



  * [simple-external-commands](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/interact-host-os/simple-external-commands)



    _Run a few os commands using the

    [os/exec](https://pkg.go.dev/os/exec)

    standard package._



  * [simple-os-interactions](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/interact-host-os/simple-os-interactions)



    _A few os interactions using the

    [syscall](https://pkg.go.dev/syscall)

    package._



## INPUT/OUTPUT



* IO READER



  * [io-reader](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-reader/io-reader)



    _Read data (a stream of bytes) from a string, buffer, file, stdin and

    a pipe to a buffer using the

    [io](https://pkg.go.dev/io)

    standard package._



  * [io-reader-simple](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-reader/io-reader-simple)



    _Read data (a stream of bytes) from a buffer to a buffer

    using the

    [io](https://pkg.go.dev/io)

    standard package._



  * [read-file](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-reader/read-file)



    _Read a file (*os.File) to a buffer._



  * [read-user-input](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-reader/read-user-input)



    _Read user input (os.Stdin) to a buffer (using Read method)

    and string (using Fscan)._



* IO WRITER



  * [io-writer](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-writer/io-writer)



    _Write data (a stream of bytes) to a buffer, file, stdout and a pipe

    from a buffer using the

    [io](https://pkg.go.dev/io)

    standard package._



  * [io-writer-simple](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-writer/io-writer-simple)



    _Write data (a stream of bytes) to a buffer

    from a buffer using the

    [io](https://pkg.go.dev/io)

    standard package._



## IN-PROCESS COMMUNICATION



* SHARED MEMORY



  * ASYNCHRONOUS



    * _Coming soon._



  * SYNCHRONOUS



    * [pipes-unnamed-simple](https://github.com/JeffDeCola/my-go-examples/tree/master/in-process-communication/shared-memory/synchronous/pipes-unnamed-simple)



      _A pipe provides a uni-directional communication channel.

      This is a very simple example of an unnamed pipe._



    * [pipes-unnamed](https://github.com/JeffDeCola/my-go-examples/tree/master/in-process-communication/shared-memory/synchronous/pipes-unnamed)



      _This is a more robust example of an unnamed pipe showing multiple reads._



    * [pipes-unnamed-io](https://github.com/JeffDeCola/my-go-examples/tree/master/in-process-communication/shared-memory/synchronous/pipes-unnamed-io)



      _This example of an unnamed pipe connects an io.Writer and io.Reader._



* MESSAGE PASSING



  * ASYNCHRONOUS



    * [channels-buffered](https://github.com/JeffDeCola/my-go-examples/tree/master/in-process-communication/message-passing/asynchronous/channels-buffered)



      _Buffered channels are uni-directional, asynchronous with no blocking._



  * SYNCHRONOUS



    * [channels-unbuffered](https://github.com/JeffDeCola/my-go-examples/tree/master/in-process-communication/message-passing/synchronous/channels-unbuffered)



      _Unbuffered channels are uni-directional, synchronous with blocking._



## INTER-PROCESS COMMUNICATION (IPC)



* SHARED MEMORY



  * ASYNCHRONOUS



    * _Coming soon._



  * SYNCHRONOUS



    * [pipes-named](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/shared-memory/synchronous/pipes-named)



      _Sending data over a named-pipe (FIFO) from one process to another process._



* MESSAGE PASSING



  * OPERATING SYSTEM



    * ASYNCHRONOUS



      * [message-queues](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/message-passing/operating-system/asynchronous/message-queues)



        _tbd._



      * [pub-sub-nats-os](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/message-passing/operating-system/asynchronous/pub-sub-nats-os)



        _tbd._



      * [tcp](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/message-passing/operating-system/asynchronous/tcp)



        _tbd._



    * SYNCHRONOUS



      * [grpc-os](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/message-passing/operating-system/synchronous/grpc-os)



        _tbd._



  * NETWORK



    * ASYNCHRONOUS



      * [pub-sub-nats-network](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/message-passing/network/asynchronous/pub-sub-nats-network)



        _tbd._



      * [tcp-ip](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/message-passing/network/asynchronous/tcp-ip)



        _tbd._



    * SYNCHRONOUS



      * [grpc-network](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/message-passing/network/synchronous/grpc-network)



        _tbd._



      * [rest](https://github.com/JeffDeCola/my-go-examples/tree/master/inter-process-communication-ipc/message-passing/network/synchronous/rest)



        _tbd._



## IoT



* RASPBERRY PI



  * [blink-led-raspberry-pi-gpio-periph](https://github.com/JeffDeCola/my-go-examples/tree/master/iot/raspberry-pi/blink-led-raspberry-pi-gpio-periph)



    _GPIO OUTPUT -

    Blink an LED via a Raspberry Pi GPIO using the

    [periph.io/...](https://pkg.go.dev/periph.io/x/conn/v3)

    packages._



  * [push-button-raspberry-pi-gpio-periph](https://github.com/JeffDeCola/my-go-examples/tree/master/iot/raspberry-pi/push-button-raspberry-pi-gpio-periph)



    _GPIO INPUT -

    Push a button via a Raspberry Pi GPIO using the

    [periph.io/...](https://pkg.go.dev/periph.io/x/conn/v3)

    packages._



  * [toggle-led-with-button-raspberry-pi-gpio-periph](https://github.com/JeffDeCola/my-go-examples/tree/master/iot/raspberry-pi/toggle-led-with-button-raspberry-pi-gpio-periph)



    _Toggle an LED with a button push via a Raspberry Pi GPIO using the

    [periph.io/...](https://pkg.go.dev/periph.io/x/conn/v3)

    packages._



## MODULES AND PACKAGES



* LOCAL PACKAGES



  * [module-with-local-package](https://github.com/JeffDeCola/my-go-examples/tree/master/modules-and-packages/local-packages/module-with-local-package)



    _A go module with a local package._



* REMOTE PACKAGES

  * [module-with-remote-package](https://github.com/JeffDeCola/my-go-examples/tree/master/modules-and-packages/remote-packages/module-with-remote-package)



    _A go module with a remote (public) package._



## STANDARD GO PACKAGES



* archive

  * tar

  * zip

* bufio

* bytes

* cmp

* compress

  * bzip2

  * flate

  * gzip

  * lzw

  * zlib

* container

  * heap

  * list

  * ring

* context

* crypto

  * aes -

    [encryptfile](https://github.com/JeffDeCola/my-go-tools/tree/master/cryptography-tools/encryptfile)

    tool,

    [decryptfile](https://github.com/JeffDeCola/my-go-tools/tree/master/cryptography-tools/decryptfile)

    tool

  * ecdsa -

    [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey)

  * elliptic -

    [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey)

  * md5 -

    [md5-hash-file](https://github.com/JeffDeCola/my-go-tools/tree/master/cryptography-tools/md5-hash-file)

    tool

  * rand -

    [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey)

  * sha256 -

    [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey),

    [sha256-hash-file](https://github.com/JeffDeCola/my-go-tools/tree/master/cryptography-tools/sha256-hash-file)

    tool

  * x509 -

    [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey)

  * etc...

* database

  * sql

  * sql-driver

* debug

  * buildinfo

  * dwarf

  * etc...

* embed

* encoding

  * hex -

    [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey)

  * pem -

    [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey)

  * etc...

* errors -

  [error-example](https://github.com/JeffDeCola/my-go-examples/tree/master/common-go/error-reporting/error-example)

* expvar

* flag -

  [flags](https://github.com/JeffDeCola/my-go-examples/tree/master/common-go/flags/flags)

* fmt

* go

  * ast

  * build

  * etc...

* hash

  * adler32

  * crc32

  * crc64

  * fnv

  * maphash

* html

  * template

* image

  * color

  * color/palette

  * draw

  * gif

  * jpeg

  * png

* index

  * suffixarray

* io -

  [io-reader](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-reader/io-reader),

  [io-reader-simple](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-reader/io-reader-simple),

  [io-writer](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-writer/io-writer),

  [io-writer-simple](https://github.com/JeffDeCola/my-go-examples/tree/master/input-output/io-writer/io-writer-simple)

  * fs

  * ioutil

* iter

* log

  * slog -

    [jeffs-logger](https://github.com/JeffDeCola/my-go-examples/tree/master/common-go/logging/jeffs-logger)

  * syslog

* maps

* math

  * big

  * bits

  * cmplx

  * rand

  * rand/v2

* mime

  * multipart

  * quotedprintable

* net

  * http

  * http/cgi

  * etc.,,

* os

  * exec -

    [simple-external-commands](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/interact-host-os/simple-external-commands)

  * signal

  * user

* path

  * filepath

* reflect -

  [create-bitcoin-address-from-ecdsa-publickey](https://github.com/JeffDeCola/my-go-examples/tree/master/architectures/blockchain/create-bitcoin-address-from-ecdsa-publickey)

* regexp (syntax)

* runtime -

  [simple-go-runtime-interactions](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/interact-go-runtime/simple-go-runtime-interactions)

  * cgo

  * coverage

  * etc...

* slices

* sort

* strconv

* strings

* structs

* sync (atomic)

* syscall -

  [simple-os-interactions](https://github.com/JeffDeCola/my-go-examples/tree/master/go-runtime/interact-host-os/simple-os-interactions)

  * js

* testing

  * fstest

  * iotest

  * quick

  * slogtest

  * synctest

* text

  * scanner

  * tabwriter

  * template

  * template/parse

* time

  * tzdata

* unicode

  * utf1

  * utf8

* unique

* unsafe

* weak