/// note | 技術細節

你也可以使用 `from starlette.websockets import WebSocket`。

**FastAPI** 直接提供相同的 `WebSocket` 只是為了方便你這位開發者，但它其實是直接來自 Starlette。

///

## 等待與傳送訊息 { #await-for-messages-and-send-messages }

在你的 WebSocket 路由中，你可以 `await` 接收訊息並傳送訊息。

{* ../../docs_src/websockets_/tutorial001_py310.py hl[48:52] *}

你可以接收與傳送二進位、文字與 JSON 資料。

## 試試看 { #try-it }

如果你的檔案名為 `main.py`，用以下指令執行應用：

# Libtensorflow archives) to GCS buckets. TFCI Mac VMs need to authenticate as
# a service account that has the right permissions to be able to do so.
set +x
if [[ -n "${GOOGLE_APPLICATION_CREDENTIALS:-}" ]]; then
  # Python 3.12 removed the module `imp` which is needed by gcloud CLI so we set
  # `CLOUDSDK_PYTHON` to Python 3.11 which is the system Python on TFCI Mac
  # VMs.
  pyenv install -s "3.11"
  if [[ $? -eq 0 ]]; then

	register := func(manager *Manager) {
		errFatal(manager.RegisterStreamingHandler(handlerTest, StreamHandler{
			Handle: func(ctx context.Context, payload []byte, request <-chan []byte, resp chan<- []byte) *RemoteErr {
				// Send many responses.
				// Test that this doesn't block.
				for i := range byte(100) {
					select {
					case resp <- []byte{i}:
					// ok
					case <-ctx.Done():
						return NewRemoteErr(ctx.Err())
					}

(c){b=new a.ActiveXObject("Microsoft.XMLHTTP")}return function(){return b}}(),f=function(a,b){var c=e();c&&(c.open("GET",a,!0),c.onreadystatechange=function(){4!==c.readyState||200!==c.status&&304!==c.status||b(c.responseText)},4!==c.readyState&&c.send(null))};if(c.ajax=f,c.queue=d,c.regex={media:/@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi,keyframes:/@(?:\-(?:o|moz|webkit)\-)?keyframes[^\{]+\{(?:[^\{\}]*\{[^\}\{]*\})+[^\}]*\}/gi,urls:/(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g,findStyles:/@media ...

**FastAPI** fournit le même `WebSocket` directement, simplement pour vous faciliter la vie en tant que développeur. Mais il provient directement de Starlette.

///

## Attendre des messages et envoyer des messages { #await-for-messages-and-send-messages }

Dans votre route WebSocket, vous pouvez `await` des messages et envoyer des messages.

{* ../../docs_src/websockets_/tutorial001_py310.py hl[48:52] *}

        assertEquals("invalid", options.expires);
    }

    @Test
    public void test_process_withName() throws Exception {
        // Test that name is properly set
        Crawler.Options options = new Crawler.Options();
        options.sessionId = "test-session";
        options.name = "Test Crawl Job";

        // Verify the name is set

				return err
			}
			return w.mw.Flush()
		}
		return nil
	}
	return &w
}

// write one or more objects to the stream in order.
// It is favorable to send as many objects as possible in a single write,
// but no more than math.MaxUint32
func (w *metacacheWriter) write(objs ...metaCacheEntry) error {
	if w == nil {
		return errors.New("metacacheWriter: nil writer")
	}

                alternativeChannel.addPendingOperation(op);
                // Operation would be resent on alternative channel
                // For now, skip actual send implementation
            } catch (Exception e) {
                log.error("Failed to redistribute operation", e);
                // Notify waiting threads of failure if the operation supports it

   * complete chunk are handled with {@link #processRemaining}.
   */
  protected abstract HashCode makeHash();

  // Process pent-up data in chunks
  private void munchIfFull() {
    if (buffer.remaining() < 8) {
      // buffer is full; not enough room for a primitive. We have at least one full chunk.
      munch();
    }
  }

            while (attempt < MAX_REDIRECTS) {
                this.connection.setRequestProperty(this.authProperty, this.authMethod + ' ' + Base64.toBase64String(type1.toByteArray()));
                this.connection.connect(); // send type 1
                response = parseResponseCode();
                if (response != HTTP_UNAUTHORIZED && response != HTTP_PROXY_AUTH) {
                    return;
                }