In many frameworks and systems just handling security and authentication takes a big amount of effort and code (in many cases it can be 50% or more of all the code written).

**FastAPI** provides several tools to help you deal with **Security** easily, rapidly, in a standard way, without having to study and learn all the security specifications.

But first, let's check some small concepts.

## In a hurry?

    checkNotNull(str);
    return (format == this) ? str : convert(format, str);
  }

  /** Enum values can override for performance reasons. */
  String convert(CaseFormat format, String s) {
    // deal with camel conversion
    StringBuilder out = null;
    int i = 0;
    int j = -1;
    while ((j = wordBoundary.indexIn(s, ++j)) != -1) {
      if (i == 0) {
        // include some extra space for separators

    public Artifact find(Artifact artifact) {
        File artifactFile = new File(getBasedir(), pathOf(artifact));

        // We need to set the file here or the resolver will fail with an NPE, not fully equipped to deal
        // with multiple local repository implementations yet.
        artifact.setFile(artifactFile);

        if (artifactFile.exists()) {
            artifact.setResolved(true);
        }

  }

  public void testToArray_threadSafe() {
    for (int delta : new int[] {+1, 0, -1}) {
      for (int i = 0; i < VALUES.length; i++) {
        List<Character> list = Chars.asList(VALUES).subList(0, i);
        Collection<Character> misleadingSize = Helpers.misleadingSizeCollection(delta);
        misleadingSize.addAll(list);
        char[] arr = Chars.toArray(misleadingSize);

# Alternativas, Inspiração e Comparações

O que inspirou o **FastAPI**, como ele se compara às alternativas e o que FastAPI aprendeu delas.

## Introdução

**FastAPI** não poderia existir se não fosse pelos trabalhos anteriores de outras pessoas.

Houveram tantas ferramentas criadas que ajudaram a inspirar sua criação.

import java.util.Collection;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import junit.framework.TestCase;

/**
 * {@link LoadingCache} tests that deal with empty caches.
 *
 * @author mike nonemacher
 */

public class EmptyCachesTest extends TestCase {

  public void testEmpty() {
    for (LoadingCache<Object, Object> cache : caches()) {

import java.util.Collection;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import junit.framework.TestCase;

/**
 * {@link LoadingCache} tests that deal with empty caches.
 *
 * @author mike nonemacher
 */

public class EmptyCachesTest extends TestCase {

  public void testEmpty() {
    for (LoadingCache<Object, Object> cache : caches()) {

Se você precisar aplicá-lo, use `OAuth2PasswordRequestFormStrict` em vez de `OAuth2PasswordRequestForm`.

///

* Um `client_id` opcional (não precisamos dele em nosso exemplo).
* Um `client_secret` opcional (não precisamos dele em nosso exemplo).

/// info | Informação

O `OAuth2PasswordRequestForm` não é uma classe especial para **FastAPI** como é `OAuth2PasswordBearer`.

        """
    }

    /**
     * Since jQuery isn't included until the bottom of this report, we need to delay until the DOM is ready using vanilla
     * javascript before doing anything.  Then we need to add a function to run on ready, which will run after the report's
     * own javascript based filtering logic is attached with jQuery.

\n\n    toast.data('autohide', this._config.autohide)\n    toast.data('animation', this._config.fade)\n\n    if (this._config.class) {\n      toast.addClass(this._config.class)\n    }\n\n    if (this._config.delay && this._config.delay != 500) {\n      toast.data('delay', this._config.delay)\n    }\n\n    const toastHeader = $('<div class=\"toast-header\">')\n\n    if (this._config.image != null) {\n      const toastImage = $('<img />').addClass('rounded mr-2').attr('src', this._config.image).attr('alt',...