Ao criar APIs da web com FastAPI, se houver um erro em nosso código, o FastAPI normalmente o conterá na única solicitação que acionou o erro. 🛡

O cliente receberá um **Erro Interno do Servidor 500** para essa solicitação, mas o aplicativo continuará funcionando para as próximas solicitações em vez de travar completamente.

### Erros maiores - Travamentos { #bigger-errors-crashes }

    assertCached(false, 413)
    assertCached(true, 414)
    assertCached(false, 415)
    assertCached(false, 416)
    assertCached(false, 417)
    assertCached(false, 418)
    assertCached(false, 500)
    assertCached(true, 501)
    assertCached(false, 502)
    assertCached(false, 503)
    assertCached(false, 504)
    assertCached(false, 505)
    assertCached(false, 506)
  }

  @Test

      String value = String.valueOf(i);
      builder.put(key, value);
      expected.put(key, value);
    }
    ImmutableMap<Integer, String> map = builder.buildKeepingLast();
    assertThat(map).hasSize(500);
    assertThat(map).containsExactlyEntriesIn(expected).inOrder();
  }

  // This method tests the int case.
  public void testBuildKeepingLast_bigTable() {

            return new String(new char[50_000]);
          }
        };
    List<Object> list = Collections.singletonList(object);
    for (int i = 0; i < 10; i++) {
      Object[] array = new Object[500];
      Arrays.fill(array, list);
      list = Arrays.asList(array);
    }
    future2.set(list);

    unused = future.toString();
  }

  public void testToString_notDone() throws Exception {

				time.Sleep(time.Duration(readRng.Intn(maxSleep)))
			}
		}
	}()

	// Writer
	{
		writeRng := rand.New(rand.NewSource(2))
		buf := make([]byte, 64<<10)
		for range 500 {
			writeRng.Read(buf)
			// Write
			n, err := rb.Write(buf[:writeRng.Intn(len(buf))])
			if err != nil {
				t.Fatalf("write failed: %v", err)
			}
			wroteBytes += n
			wrote.Write(buf[:n])

	var epsResolved int
	var foundLocal bool
	resolvedList := make([]bool, len(endpoints))
	// Mark the starting time
	startTime := time.Now()
	keepAliveTicker := time.NewTicker(500 * time.Millisecond)
	defer keepAliveTicker.Stop()
	for !foundLocal && (epsResolved != len(endpoints)) {
		// Break if the local endpoint is found already Or all the endpoints are resolved.

lEvent.pointerType.toUpperCase()]&&(t.touchDeltaX=e.originalEvent.clientX-t.touchStartX),t._handleSwipe(),"hover"===t._config.pause&&(t.pause(),t.touchTimeout&&clearTimeout(t.touchTimeout),t.touchTimeout=setTimeout((function(e){return t.cycle(e)}),500+t._config.interval))};o.default(this._element.querySelectorAll(".carousel-item img")).on("dragstart.bs.carousel",(function(t){return t.preventDefault()})),this._pointerEvent?(o.default(this._element).on("pointerdown.bs.carousel",(function(t){return...

            return new String(new char[50_000]);
          }
        };
    List<Object> list = Collections.singletonList(object);
    for (int i = 0; i < 10; i++) {
      Object[] array = new Object[500];
      Arrays.fill(array, list);
      list = Arrays.asList(array);
    }
    future2.set(list);

    unused = future.toString();
  }

  public void testToString_notDone() throws Exception {

	dataUsageUpdateDirCycles         = 16                               // Visit all folders every n cycles.
	dataScannerCompactLeastObject    = 500                              // Compact when there is less than this many objects in a branch.
	dataScannerCompactAtChildren     = 10000                            // Compact when there are this many children in a branch.

### 我々は間違いを犯す

私たち人間は常に**間違い**を犯します。ソフトウェアには、ほとんど常に**バグ**があらゆる箇所に隠されています。🐛

### 小さなエラーは自動的に処理される

FastAPIでWeb APIを構築する際に、コードにエラーがある場合、FastAPIは通常、エラーを引き起こした単一のリクエストにエラーを含めます。🛡

クライアントはそのリクエストに対して**500 Internal Server Error**を受け取りますが、アプリケーションは完全にクラッシュするのではなく、次のリクエストのために動作を続けます。

### 重大なエラー - クラッシュ

しかしながら、**アプリケーション全体をクラッシュさせるようなコードを書いて**UvicornとPythonをクラッシュさせるようなケースもあるかもしれません。💥