placeholder: Tell us what you see!
      value:
      render: shell
    validations:
      required: true
  - type: textarea
    id: logs
    attributes:
      label: Relevant log output
      description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.

     */
    int DCERPC_LAST_FRAG = 0x02; /* Last fragment */
    /**
     * Pending cancel flag - indicates cancel was pending at sender
     */
    int DCERPC_PENDING_CANCEL = 0x04; /* Cancel was pending at sender */
    /**
     * Reserved flag for future use
     */
    int DCERPC_RESERVED_1 = 0x08;
    /**
     * Supports concurrent multiplexing flag
     */

FastAPI Cloud 是 *FastAPI and friends* 開源專案的主要贊助與資金提供者。✨

## 雲端供應商 - 贊助商 { #cloud-providers-sponsors }

其他一些雲端供應商也會 ✨ [**贊助 FastAPI**](../help-fastapi.md#sponsor-the-author) ✨。🙇

你也可以參考他們的指南並試用其服務：

* [Render](https://docs.render.com/deploy-fastapi?utm_source=deploydoc&utm_medium=referral&utm_campaign=fastapi)

FastAPI Cloud 是 *FastAPI and friends* 开源项目的主要赞助方和资金提供者。✨

## 云服务商 - 赞助商 { #cloud-providers-sponsors }

还有一些云服务商也会 ✨ [**赞助 FastAPI**](../help-fastapi.md#sponsor-the-author) ✨。🙇

你也可以考虑按照他们的指南尝试他们的服务：

* [Render](https://docs.render.com/deploy-fastapi?utm_source=deploydoc&utm_medium=referral&utm_campaign=fastapi)

## クラウドプロバイダ - スポンサー { #cloud-providers-sponsors }

他にもいくつかのクラウドプロバイダが ✨ [**FastAPI をスポンサーしています**](../help-fastapi.md#sponsor-the-author) ✨。🙇

それらのガイドを参考にし、サービスを試してみるのもよいでしょう:

* [Render](https://docs.render.com/deploy-fastapi?utm_source=deploydoc&utm_medium=referral&utm_campaign=fastapi)

    img: https://fastapi.tiangolo.com/img/sponsors/liblab.png
  - url: https://docs.render.com/deploy-fastapi?utm_source=deploydoc&utm_medium=referral&utm_campaign=fastapi
    title: Deploy & scale any full-stack web app on Render. Focus on building apps, not infra.
    img: https://fastapi.tiangolo.com/img/sponsors/render.svg
  - url: https://www.coderabbit.ai/?utm_source=fastapi&utm_medium=badge&utm_campaign=fastapi

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

   Empty State (ADS pattern)
   ============================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    height: 100%;
    background: linear-gradient(180deg, #fafbfc 0%, #ffffff 100%);
}

.empty-state-icon {
    width: 80px;
    height: 80px;

from typing import Any

import orjson
from fastapi import FastAPI, Response

app = FastAPI()


class CustomORJSONResponse(Response):
    media_type = "application/json"

    def render(self, content: Any) -> bytes:
        assert orjson is not None, "orjson must be installed"
        return orjson.dumps(content, option=orjson.OPT_INDENT_2)


@app.get("/", response_class=CustomORJSONResponse)
async def main():

# Header Parameters { #header-parameters }

You can define Header parameters the same way you define `Query`, `Path` and `Cookie` parameters.

## Import `Header` { #import-header }

First import `Header`:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[3] *}

## Declare `Header` parameters { #declare-header-parameters }

Then declare the header parameters using the same structure as with `Path`, `Query` and `Cookie`.