Gin Auth Handlers

Installation

To install Gah (Gin Auth Handlers) package, you need to install Go and set your Go workspace first.

dev.to Authentication with gin-gonic && gah for golang

You can use the below Go command to install Gah.

go get -u github.com/yasaricli/gah

Usage and documentation

First let's set the required environment variables

export MONGO_URL=mongodb://127.0.0.1:27017 # MongoDB server URL.
export MONGO_DATABASE=project_db # MongoDB Project db name
export MONGO_COLLECTION=users # Collection to register all users

Use with gin-gonic

You need the gin package to use gah. You can install it as follows.

go get -u github.com/gin-gonic/gin

Add the LoginHandler and RegisterHandler functions to the API.

package main

import (
  "github.com/gin-gonic/gin"
  "github.com/yasaricli/gah"
)

func main() {
  router := gin.Default()
   
  api := router.Group("/api")
  {
    api.POST("/login", gah.LoginHandler)
    api.POST("/register", gah.RegisterHandler)
  }

  router.Run(":4000")
}

AuthRequiredMiddleware

Let's make a handler where the user is required:

Default: Get user ID and auth token from X-User-Id and X-Auth-Token headers

func main() {
  router := gin.Default()
   
  api := router.Group("/api")
  {
    api.GET("/books", gah.AuthRequiredMiddleware, func(c *gin.Context) {
      userID := c.MustGet("userID")
      
      c.JSON(200, gin.H{
        "userId": userID,
      })
    })
  }

  router.Run(":4000")
}

Production Release Mode

[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
 - using env:	export GIN_MODE=release
 - using code:	gin.SetMode(gin.ReleaseMode)