ashkan90 / oauth-client

Used SSO providers are Github and Google.

Introduction

You need to configure your oauth2 settings on provider's page. Google oauth credential example above.

Usage

Implementation is very similar at any framework or pure http package. You only need to initiate sso provider struct correct and rest of will be fine. An example wrote above to understand how this package can be used.

Fiber Framework

Register as context, use everywhere

   var (
       oauthClient oauthclient.Client
       oauthConfig oauth_client.AuthConfig	
   )
   // ... initiate oauthConfig and oauthClient variables.
   app.Use(func(c *fiber.Ctx) error {
   	var (
   		oauthGoogleProcessor = oauth.NewOAuthProcessor(s.oauthClient, s.oauthConfig.Google)
   		oauthGoogle          = sso.NewStrategyProxy(strategies.NewGoogleSSO(oauthGoogleProcessor))
   
   		oauthGithubProcessor = oauth.NewOAuthProcessor(s.oauthClient, s.oauthConfig.Github)
   		oauthGithub          = sso.NewStrategyProxy(strategies.NewGithubSSO(oauthGithubProcessor))
   	)
   
   	c.Locals(oauth.GithubCtx, oauthGithub)
   	c.Locals(oauth.GoogleCtx, oauthGoogle)
   
   	return c.Next()
   })

Handler

type AuthHandler interface {
    LoginGithub(c *fiber.Ctx) error
    LoginGoogle(c *fiber.Ctx) error
    Register(c *fiber.Ctx) error
}

type authHandler struct {
    oauthStrategy sso.StrategySelector
}

func NewAuthHandler(oauth sso.StrategySelector) AuthHandler {
    return &authHandler{
        oauthStrategy: oauth
    }
}

func (h *authHandler) LoginGithub(c *fiber.Ctx) error {
	var (
		oauthGithub = oauthutil.Github(c.Context())
		url, err    = h.oauthStrategy.Set(oauthGithub).Login()
	)

	if err != nil {
		return c.SendStatus(fiber.StatusNotFound)
	}

	return c.Redirect(url, fiber.StatusTemporaryRedirect)
}

func (h *authHandler) LoginGoogle(c *fiber.Ctx) error {
	var (
		oauthGoogle = oauthutil.Google(c.Context())
		url, err    = h.oauthStrategy.Set(oauthGoogle).Login()
	)

	if err != nil {
		return c.SendStatus(fiber.StatusNotFound)
	}

	return c.Redirect(url, fiber.StatusTemporaryRedirect)
}

Register function

func (h *authHandler) Register(c *fiber.Ctx) error {
	var (
		cb  oauth.CallbackResponse
		ctx = c.Context()
		err = c.QueryParser(&cb)
	)
	
	if err != nil {
		log.Println("[INFO]", err)
		return c.SendStatus(http.StatusNotFound)
	}
	
	var res, rErr = h.oauthStrategy.SetByCtx(ctx, cb.Provider).Register(ctx, cb)
	if rErr != nil {
		return c.SendStatus(http.StatusNotFound)
	}
	
	return c.JSON(res)
}

To test your register endpoint, you'll have to visit localhost:xx/register?provider={yourProvider}

Available providers

• Google
• Github