@FunctionalInterface
    protected interface ContentWriter {
        /**
         * Accepts a writer.
         * @param writer A writer.
         * @throws IOException if an I/O error occurs.
         * @throws TikaException if a Tika exception occurs.
         * @throws SAXException if a SAX exception occurs.
         */
        void accept(Writer writer) throws IOException, TikaException, SAXException;
    }

    /**

/// tip

Here we are using `Query()` because this is a **query parameter**. Later we will see others like `Path()`, `Body()`, `Header()`, and `Cookie()`, that also accept the same arguments as `Query()`.

///

FastAPI will now:

* **Validate** the data making sure that the max length is 50 characters
* Show a **clear error** for the client when the data is not valid

   *     State#TERMINATED} when this method is called then this will throw an IllegalStateException.
   * @since 15.0
   */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  void awaitRunning(long timeout, TimeUnit unit) throws TimeoutException;

  /**
   * Waits for the {@link Service} to reach the {@linkplain State#TERMINATED terminated state}.
   *

      )
    }

    val headerAccept = response.header("Sec-WebSocket-Accept")
    val acceptExpected = (key + WebSocketProtocol.ACCEPT_MAGIC).encodeUtf8().sha1().base64()
    if (acceptExpected != headerAccept) {
      throw ProtocolException(
        "Expected 'Sec-WebSocket-Accept' header value '$acceptExpected' but was '$headerAccept'",
      )
    }

    return response.socket

                .stream(out -> {
                    try (final Writer writer = new BufferedWriter(new OutputStreamWriter(out.stream(), Constants.CHARSET_UTF_8))) {
                        writeCall.accept(writer);
                        writer.flush();
                    }
                });
    }

            return; // basically no way when called in Framework (because called when SpecifyColumn exists)
        }
        __specifiedProperties = newModifiedProperties();
        __specifiedProperties.accept(__modifiedProperties);
    }

    // ===================================================================================
    //                                                                Specified Properties

            writer.accept(CLIReportingUtils.showVersionMinimal());
        } else if (context.invokerRequest.effectiveVerbose()) {
            writer.accept(CLIReportingUtils.showVersion(
                    ProcessHandle.current().info().commandLine().orElse(null), describe(context.terminal)));

        } else {
            writer.accept(CLIReportingUtils.showVersion());
        }
    }

            return; // basically no way when called in Framework (because called when SpecifyColumn exists)
        }
        __specifiedProperties = newModifiedProperties();
        __specifiedProperties.accept(__modifiedProperties);
    }

    // ===================================================================================
    //                                                                Specified Properties

            return; // basically no way when called in Framework (because called when SpecifyColumn exists)
        }
        __specifiedProperties = newModifiedProperties();
        __specifiedProperties.accept(__modifiedProperties);
    }

    // ===================================================================================
    //                                                                Specified Properties

If an incoming request does not validate correctly then a `400` response will be sent.

## `GZipMiddleware` { #gzipmiddleware }

Handles GZip responses for any request that includes `"gzip"` in the `Accept-Encoding` header.

The middleware will handle both standard and streaming responses.

{* ../../docs_src/advanced_middleware/tutorial003_py39.py hl[2,6] *}

The following arguments are supported: