## What is "Dependency Injection" { #what-is-dependency-injection }

**"Dependency Injection"** means, in programming, that there is a way for your code (in this case, your *path operation functions*) to declare things that it requires to work and use: "dependencies".

And then, that system (in this case **FastAPI**) will take care of doing whatever is needed to provide your code with those needed dependencies ("inject" the dependencies).

/// info | Información

Un token "bearer" no es la única opción.

Pero es la mejor para nuestro caso de uso.

Y podría ser la mejor para la mayoría de los casos de uso, a menos que seas un experto en OAuth2 y sepas exactamente por qué hay otra opción que se adapta mejor a tus necesidades.

En ese caso, **FastAPI** también te proporciona las herramientas para construirlo.

///

Any HTTP (error) status code 401 "UNAUTHORIZED" is supposed to also return a `WWW-Authenticate` header.

In the case of bearer tokens (our case), the value of that header should be `Bearer`.

You can actually skip that extra header and it would still work.

But it's provided here to be compliant with the specifications.

		{"VADDPD.Z.A X0, X1, X2", `Z suffix should be the last; unknown suffix "A"`},
		{"VADDPD.Z.Z X0, X1, X2", `Z suffix should be the last; duplicate suffix "Z"`},
		{"VADDPD.SAE.BCST X0, X1, X2", `can't combine rounding/SAE and broadcast`},
		{"VADDPD.BCST.SAE X0, X1, X2", `can't combine rounding/SAE and broadcast`},
		{"VADDPD.BCST.Z.SAE X0, X1, X2", `Z suffix should be the last; can't combine rounding/SAE and broadcast`},

These are any `OPTIONS` request with `Origin` and `Access-Control-Request-Method` headers.

In this case the middleware will intercept the incoming request and respond with appropriate CORS headers, and either a `200` or `400` response for informational purposes.

### Simple requests { #simple-requests }

En este caso, usaría el certificado para `someapp.example.com`.

<img src="/img/deployment/https/https03.drawio.svg">

El cliente ya **confía** en la entidad que generó ese certificado TLS (en este caso Let's Encrypt, pero lo veremos más adelante), por lo que puede **verificar** que el certificado sea válido.

	if err != nil {
		t.Fatalf("%s : %s", instanceType, err.Error())
	}

	resultCases := []ObjectInfo{
		// ObjectInfo -1.
		// ObjectName set to a existing object in the test case (Test case 14).
		{Bucket: "test-getobjectinfo", Name: "Asia/asiapics.jpg", ContentType: "image/jpeg", IsDir: false},
		{Bucket: "test-getobjectinfo", Name: "Asia/empty-dir/", ContentType: "application/octet-stream", IsDir: true},
	}

	// Allows for a sub-match of the first value after 'for=' to the next
	// comma, semi-colon or space. The match is case-insensitive.
	forRegex = regexp.MustCompile(`(?i)(?:for=)([^(;|,| )]+)(.*)`)
	// Allows for a sub-match for the first instance of scheme (http|https)
	// prefixed by 'proto='. The match is case-insensitive.
	protoRegex = regexp.MustCompile(`(?i)^(;|,| )+(?:proto=)(https|http)`)
)

		)

		for {
			select {
			case rebalErr := <-doneCh:
				quit = true
				notify = true
				now := time.Now()
				var status rebalStatus

				switch {
				case errors.Is(rebalErr, context.Canceled):
					status = rebalStopped
					traceMsg = fmt.Sprintf("stopped at %s", now)
				case rebalErr == nil:
					status = rebalCompleted

		var forwardTo string
		// If we resume to the same bucket, forward to last known item.
		b := tracker.getBucket()
		if b == bucket {
			forwardTo = tracker.getObject()
		}
		if b != "" {
			// Reset to where last bucket ended if resuming.
			tracker.resume()
		}
		tracker.setObject("")
		tracker.setBucket(bucket)
		// Heal current bucket again in case if it is failed
		// in the beginning of erasure set healing