通过 **FastAPI** 你可以获得所有 **Starlette** 的特性（FastAPI 就像加强版的 Starlette）：

* 令人惊叹的性能。它是[Python 可用的最快的框架之一，和 **NodeJS** 及 **Go** 相当](https://github.com/encode/starlette#performance)。
* **支持 WebSocket**。
* 进程内后台任务。
* Startup 和 shutdown 事件。
* 测试客户端基于 HTTPX。
* **CORS**、GZip、静态文件、流响应。
* 支持 **Session 和 Cookie**。
* 100% 测试覆盖率。
* 代码库 100% 类型注释。

## Pydantic 特性 { #pydantic-features }

                });
    }

    /**
     * Cleanup method called when the helper is being destroyed.
     * Logs cache statistics and processes any remaining statistics
     * objects in the cache before shutdown.
     */
    @PreDestroy
    public void destroy() {
        if (logger.isDebugEnabled()) {
            logger.debug("cache stats: {}", statsCache.stats());
        }

     * @return true if the crawling should continue, false otherwise.
     */
    protected boolean isContinue(final int tcCount) {
        if (!crawlerContainer.available()) {
            // system shutdown
            return false;
        }

        boolean isContinue = false;
        if (tcCount < crawlerContext.maxThreadCheckCount) {
            final long maxAccessCount = crawlerContext.getMaxAccessCount();

      startUpCalled = true;
      assertEquals(State.STARTING, state());
      if (startUpException != null) {
        throw startUpException;
      }
    }

    @Override
    protected void shutDown() throws Exception {
      assertTrue(startUpCalled);
      assertFalse(shutDownCalled);
      shutDownCalled = true;
      if (shutDownException != null) {
        throw shutDownException;
      }
    }

      startUpCalled = true;
      assertEquals(State.STARTING, state());
      if (startUpException != null) {
        throw startUpException;
      }
    }

    @Override
    protected void shutDown() throws Exception {
      assertTrue(startUpCalled);
      assertFalse(shutDownCalled);
      shutDownCalled = true;
      if (shutDownException != null) {
        throw shutDownException;
      }
    }

              }));
    }

    // For more about this test, see the equivalent in AbstractNetworkTest.
    for (Future<?> future : futures.build()) {
      future.get();
    }
    executor.shutdown();
  }

* the query parameter
* the cookie parameter
* the header parameter
* the form parameter
* the function parameter

* the event
* the startup event
* the startup of the server
* the shutdown event
* the lifespan event

* the handler
* the event handler
* the exception handler
* to handle

* the model
* the Pydantic model
* the data model
* the database model

@test "Verify that it's possible to query every TensorFlow target without BUILD errors" {
    bazel query "deps(//tensorflow/... -attr(tags, 'manual', //tensorflow/...))" > /dev/null
}

teardown_file() {
    bazel shutdown

}

// ObjectLayer implements primitives for object API layer.
type ObjectLayer interface {
	// Locking operations on object.
	NewNSLock(bucket string, objects ...string) RWLocker

	// Storage operations.
	Shutdown(context.Context) error
	NSScanner(ctx context.Context, updates chan<- DataUsageInfo, wantCycle uint32, scanMode madmin.HealScanMode) error
	BackendInfo() madmin.BackendInfo

            }
            httpClient = null;
            if (clientConnectionManager != null) {
                clientConnectionManager.shutdown();
                if (logger.isDebugEnabled()) {
                    logger.debug("HTTP client connection manager shutdown complete");
                }
            }
        }
    }

    /**
     * Adds a property to the HTTP client configuration.
     *