📝 [Proposal]: Access ctx from Authorizer function from BasicAuth middleware.

[nakisen]

Feature Proposal Description

I needed to access ctx from the Authorizer function. I make a database query in this function and I needed to transfer some values ​​to the main handler. Since ctx cannot be accessed, a DB query needs to be made again in the main handler. I somehow solved my need, but if this becomes a permanent feature, it would be useful for different usage scenarios.

Alignment with Express API

This can be done in Express.js.

HTTP RFC Standards Compliance

This is not an issue related to the http RFC.

API Stability

A feature that could be used in the future.

Feature Examples

func initHttpServer() error {
...
	basicAuthCfg := basicauth.Config{
		Authorizer:   authorizeHttpBasic,
	}
	basicAuthMiddleware := basicauth.New(basicAuthCfg)
	httpSrv.Use("/pb", basicAuthMiddleware)

	httpSrv.Get("/pb/:brand", brand_xml)
...
}

func authorizeHttpBasic(user, pass string, c fiber.Ctx) bool {
	list := chekUserAndGetListFromDB(user, pass)
	if len(list) > 0 {
		c.Locals("list", list)
		return true
	}

	return false
}

func brand_xml(c fiber.Ctx) error {
...
	brand := c.Params("brand")
	list := c.Locals("list").([]map[string]string)
	return tmpl.ExecuteTemplate(c.Response().BodyWriter(), brand, list)
...
}

Checklist:

• I agree to follow Fiber's Code of Conduct.
• I have searched for existing issues that describe my proposal before opening this one.
• I understand that a proposal that does not meet these guidelines may be closed without explanation.

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[gaby]

@nakisen Can you provide a URL to see how Express.js is implementing this?

[nakisen]

I guess I have entered some incomplete information about Express.js. You can easily do this by writing your own middleware in Express.js.

Yes, you can do this by writing middleware in Fiber and that's what I did. It would be nice to have this feature in the built-in "basicauth" middleware.

There will only be a small change in the config struct and a few lines of related code will change.

// middleware/basicauth/config.go
// Before
type Config struct {
...
	Authorizer func(string, string) bool
...
}

// After
type Config struct {
...
	Authorizer func(string, string, fiber.Ctx) bool
...
}

[gaby]

@nakisen I will submit a PR for this in v3 this week/weekend.