From 3a78fd393d3c99d726860d7e35398e4cb237f7f7 Mon Sep 17 00:00:00 2001
From: CaptainNEO <tianpengfei@rcrai.com>
Date: Thu, 10 Mar 2022 21:01:51 +0800
Subject: [PATCH] almost finished..

---
 .gitignore                                    |    2 +
 README.md                                     |  136 +-
 .../drf_example/animals/__init__.py           |    0
 .../__pycache__/__init__.cpython-310.pyc      |  Bin 0 -> 198 bytes
 .../animals/__pycache__/admin.cpython-310.pyc |  Bin 0 -> 239 bytes
 .../animals/__pycache__/apps.cpython-310.pyc  |  Bin 0 -> 479 bytes
 .../__pycache__/models.cpython-310.pyc        |  Bin 0 -> 1252 bytes
 .../__pycache__/serializers.cpython-310.pyc   |  Bin 0 -> 669 bytes
 .../animals/__pycache__/views.cpython-310.pyc |  Bin 0 -> 584 bytes
 .../drf_example/drf_example/animals/admin.py  |    3 +
 .../drf_example/drf_example/animals/apps.py   |    6 +
 .../animals/migrations/0001_initial.py        |   28 +
 .../animals/migrations/__init__.py            |    0
 .../__pycache__/0001_initial.cpython-310.pyc  |  Bin 0 -> 1128 bytes
 .../__pycache__/__init__.cpython-310.pyc      |  Bin 0 -> 209 bytes
 .../drf_example/drf_example/animals/models.py |   27 +
 .../drf_example/animals/serializers.py        |    8 +
 .../drf_example/drf_example/animals/tests.py  |    3 +
 .../drf_example/drf_example/animals/views.py  |    8 +
 .../drf_example/drf_example/__init__.py       |    0
 .../__pycache__/__init__.cpython-310.pyc      |  Bin 0 -> 202 bytes
 .../__pycache__/settings.cpython-310.pyc      |  Bin 0 -> 2382 bytes
 .../__pycache__/urls.cpython-310.pyc          |  Bin 0 -> 1578 bytes
 .../__pycache__/wsgi.cpython-310.pyc          |  Bin 0 -> 613 bytes
 .../drf_example/drf_example/asgi.py           |   16 +
 .../drf_example/drf_example/settings.py       |  125 ++
 .../drf_example/drf_example/urls.py           |   44 +
 .../drf_example/drf_example/wsgi.py           |   16 +
 python/drf_example/drf_example/manage.py      |   22 +
 .../drf_example/openapi-schema.yml            |  176 ++
 .../drf_example/templates/swagger.html        |   31 +
 python/drf_example/poetry.lock                |  149 ++
 python/drf_example/pyproject.toml             |   18 +
 python/fastapi_example/main.py                |   26 +-
 rust/poem/.gitignore                          |    1 +
 rust/poem/Cargo.lock                          | 1425 +++++++++++++++++
 rust/poem/Cargo.toml                          |   18 +
 rust/poem/src/main.rs                         |  149 ++
 38 files changed, 2362 insertions(+), 75 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 python/drf_example/drf_example/animals/__init__.py
 create mode 100644 python/drf_example/drf_example/animals/__pycache__/__init__.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/animals/__pycache__/admin.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/animals/__pycache__/apps.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/animals/__pycache__/models.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/animals/__pycache__/serializers.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/animals/__pycache__/views.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/animals/admin.py
 create mode 100644 python/drf_example/drf_example/animals/apps.py
 create mode 100644 python/drf_example/drf_example/animals/migrations/0001_initial.py
 create mode 100644 python/drf_example/drf_example/animals/migrations/__init__.py
 create mode 100644 python/drf_example/drf_example/animals/migrations/__pycache__/0001_initial.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/animals/migrations/__pycache__/__init__.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/animals/models.py
 create mode 100644 python/drf_example/drf_example/animals/serializers.py
 create mode 100644 python/drf_example/drf_example/animals/tests.py
 create mode 100644 python/drf_example/drf_example/animals/views.py
 create mode 100644 python/drf_example/drf_example/drf_example/__init__.py
 create mode 100644 python/drf_example/drf_example/drf_example/__pycache__/__init__.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/drf_example/__pycache__/settings.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/drf_example/__pycache__/urls.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/drf_example/__pycache__/wsgi.cpython-310.pyc
 create mode 100644 python/drf_example/drf_example/drf_example/asgi.py
 create mode 100644 python/drf_example/drf_example/drf_example/settings.py
 create mode 100644 python/drf_example/drf_example/drf_example/urls.py
 create mode 100644 python/drf_example/drf_example/drf_example/wsgi.py
 create mode 100755 python/drf_example/drf_example/manage.py
 create mode 100644 python/drf_example/drf_example/openapi-schema.yml
 create mode 100644 python/drf_example/drf_example/templates/swagger.html
 create mode 100644 python/drf_example/poetry.lock
 create mode 100644 python/drf_example/pyproject.toml
 create mode 100644 rust/poem/.gitignore
 create mode 100644 rust/poem/Cargo.lock
 create mode 100644 rust/poem/Cargo.toml
 create mode 100644 rust/poem/src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c074f6a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.venv
+db.sqlite3
diff --git a/README.md b/README.md
index d51d043..480b0af 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,6 @@
 # OpenAPI3 Framworks Compare
 
 本文会横向对比几种支持OpenAPI文档生成的工具/框架。
-
 OpenAPI Specification（下文简称OAS）定义了一个标准的、语言无关的 RESTful API 接口规范，它可以同时允许开发人员和操作系统查看并理解某个服务的功能，而无需访问源代码，文档或网络流量检查（既方便人类学习和阅读，也方便机器阅读）。正确定义 OAS 后，开发者可以使用最少的实现逻辑来理解远程服务并与之交互。
 
 此外，文档生成工具可以使用 OpenAPI 规范来生成 API 文档，代码生成工具可以生成各种编程语言下的服务端和客户端代码，测试代码和其他用例。OpenAPI官方提供了各种语言的服务端和客户端的代码生成工具，比较著名的如[OpenAPI Generator](https://github.com/OpenAPITools/openapi-generator)，当然也有很多优秀的第三方开发者开发的工具。
@@ -47,46 +46,43 @@ OpenAPI Specification（下文简称OAS）定义了一个标准的、语言无
 
 ## 2. 参赛选手介绍
 
-| 语言   | 框架                                                                     | Web功能完备 | OpenAPI版本 | Github Stars                                                                   | 当前版本                                                                           | first release date |
-|--------|--------------------------------------------------------------------------|-------------|-------------|--------------------------------------------------------------------------------|------------------------------------------------------------------------------------|--------------------|
-| Go     | [goa](https://github.com/goadesign/goa)                                  | 是          | 3           | ![stars](https://img.shields.io/github/stars/goadesign/goa.svg)                | ![Release](https://img.shields.io/github/tag/goadesign/goa.svg)                    | 2016-08-03         |
-| Go     | [swag](https://github.com/swaggo/swag)                                   | 否          | 2           | ![stars](https://img.shields.io/github/stars/swaggo/swag.svg)                  | ![Release](https://img.shields.io/github/release/swaggo/swag.svg)                  | 2017-11-30         |
-| Go     | [grpc-gateway](https://github.com/grpc-ecosystem/grpc-gateway)           | 是          | 2           | ![stars](https://img.shields.io/github/stars/grpc-ecosystem/grpc-gateway.svg)  | ![Release](https://img.shields.io/github/release/grpc-ecosystem/grpc-gateway.svg)  | 2016-07-11         |
-| Go     | [fizz](https://github.com/wI2L/fizz)                                     | 是          | 3           | ![stars](https://img.shields.io/github/stars/wI2L/fizz.svg)                    | ![Release](https://img.shields.io/github/release/wI2L/fizz.svg)                    | 2019-11-06         |
-| Python | [Django REST framework](https://github.com/encode/django-rest-framework) | 是          | 3           | ![stars](https://img.shields.io/github/stars/encode/django-rest-framework.svg) | ![Release](https://img.shields.io/github/release/encode/django-rest-framework.svg) | 2011-02-22         |
-| Python | [FastAPI](https://github.com/tiangolo/fastapi)                           | 是          | 3           | ![stars](https://img.shields.io/github/stars/tiangolo/fastapi.svg)             | ![Release](https://img.shields.io/github/release/tiangolo/fastapi.svg)             | 2018-12-16         |
-| Rust   | [Poem](https://github.com/poem-web/poem)                                 | 是          | 3           | ![stars](https://img.shields.io/github/stars/poem-web/poem.svg)                | ![Release](https://img.shields.io/github/tag/poem-web/poem.svg)                    | 2021-10-14         |
+| 语言   | 框架                                                                     | Web功能完备 | 使用OpenAPI版本 | Github Stars                                                                   | Contributors                                                                                 | Commit Activity                                                                             | 当前版本                                                                           | first release date |
+|--------|--------------------------------------------------------------------------|-------------|-----------------|--------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------|--------------------|
+| Go     | [goa](https://github.com/goadesign/goa)                                  | 是          | 3               | ![stars](https://img.shields.io/github/stars/goadesign/goa.svg)                | ![contributors](https://img.shields.io/github/contributors/goadesign/goa.svg)                | ![commit](https://img.shields.io/github/commit-activity/y/goadesign/goa.svg)                | ![Release](https://img.shields.io/github/tag/goadesign/goa.svg)                    | 2016-08-03         |
+| Go     | [grpc-gateway](https://github.com/grpc-ecosystem/grpc-gateway)           | 是          | 2               | ![stars](https://img.shields.io/github/stars/grpc-ecosystem/grpc-gateway.svg)  | ![contributors](https://img.shields.io/github/contributors/grpc-ecosystem/grpc-gateway.svg)  | ![commit](https://img.shields.io/github/commit-activity/y/grpc-ecosystem/grpc-gateway.svg)  | ![Release](https://img.shields.io/github/release/grpc-ecosystem/grpc-gateway.svg)  | 2016-07-11         |
+| Go     | [swag](https://github.com/swaggo/swag)                                   | 否          | 2               | ![stars](https://img.shields.io/github/stars/swaggo/swag.svg)                  | ![contributors](https://img.shields.io/github/contributors/swaggo/swag.svg)                  | ![commit](https://img.shields.io/github/commit-activity/y/swaggo/swag.svg)                  | ![Release](https://img.shields.io/github/release/swaggo/swag.svg)                  | 2017-11-30         |
+| Go     | [fizz](https://github.com/wI2L/fizz)                                     | 是          | 3               | ![stars](https://img.shields.io/github/stars/wI2L/fizz.svg)                    | ![contributors](https://img.shields.io/github/contributors/wI2L/fizz.svg)                    | ![commit](https://img.shields.io/github/commit-activity/y/wI2L/fizz.svg)                    | ![Release](https://img.shields.io/github/release/wI2L/fizz.svg)                    | 2019-11-06         |
+| Python | [Django REST framework](https://github.com/encode/django-rest-framework) | 是          | 3               | ![stars](https://img.shields.io/github/stars/encode/django-rest-framework.svg) | ![contributors](https://img.shields.io/github/contributors/encode/django-rest-framework.svg) | ![commit](https://img.shields.io/github/commit-activity/y/encode/django-rest-framework.svg) | ![Release](https://img.shields.io/github/release/encode/django-rest-framework.svg) | 2011-02-22         |
+| Python | [FastAPI](https://github.com/tiangolo/fastapi)                           | 是          | 3               | ![stars](https://img.shields.io/github/stars/tiangolo/fastapi.svg)             | ![contributors](https://img.shields.io/github/contributors/tiangolo/fastapi.svg)             | ![commit](https://img.shields.io/github/commit-activity/y/tiangolo/fastapi.svg)             | ![Release](https://img.shields.io/github/release/tiangolo/fastapi.svg)             | 2018-12-16         |
+| Rust   | [Poem](https://github.com/poem-web/poem)                                 | 是          | 3               | ![stars](https://img.shields.io/github/stars/poem-web/poem.svg)                | ![contributors](https://img.shields.io/github/contributors/poem-web/poem.svg)                | ![commit](https://img.shields.io/github/commit-activity/y/poem-web/poem.svg)                | ![Release](https://img.shields.io/github/tag/poem-web/poem.svg)                    | 2021-10-14         |
 
 ## 3. 详细对比
 
 所有框架均会从以下几个方面进行讨论
+> 所有评价均为个人意见，欢迎不同声音:D
 
 1. 开发过程
 2. OAS的实现方式: 探究这些工具是如何从代码生成对应sepc文件的，并会导航一些关键代码，方便读者进行深入探究。
 3. 优点：该框架的一些特色或者相比其他框架有优势的地方
 4. 缺点：该框架的一些劣势，或者不使用的理由
 
-> 所有评价均为个人意见，欢迎不同声音:D
+以及下文中所涉及项目的完整代码均保存在本仓库中。
+
 
 ### 1. Goa
 
 #### 1. 开发过程
 
-1. 安装goa提供的代码生成工具
+1. 安装goa提供的代码生成工具，创建一个design文件夹，用于描述API
 
     ```bash
     go install goa.design/goa/v3/cmd/goa@v3
-    ```
-
-2. 创建一个design文件夹，用于描述API
-
-    ```bash
     mkdir -p goa_example/design
     ```
 
-3. 使用goa提供的dsl描述API [desigin.go](go/goa_example/design/design.go)
+2. 使用goa提供的dsl描述API [desigin.go](go/goa_example/design/design.go)
 
-4. 生成代码模板
+3. 生成代码模板
 
     ```bash
     goa gen goa_example/design
@@ -94,7 +90,7 @@ OpenAPI Specification（下文简称OAS）定义了一个标准的、语言无
 
     该步骤会生成gen文件夹中的所有文件，包括design文件中定义的所有接口信息、Model描述、验证方式、Protobuf描述(如果有)等所有相关信息的Go描述
 
-5. (optional) 生成实现的一个example
+4. (optional) 生成实现的一个example
 
     ```bash
     goa example goa_example/design
@@ -102,7 +98,7 @@ OpenAPI Specification（下文简称OAS）定义了一个标准的、语言无
 
     该步骤会生成cmd文件夹，包括http server和 grpc server的启动代码
     和项目根目录/{service_name}.go的文件，其中包含了各方法的默认实现(fmt.Println())
-6. 完成代码实现
+5. 完成代码实现
 
     接下来只需要修改各方法中的具体实现为真实业务逻辑即可[service1.go](go/goa_example/service1.go)
 
@@ -422,7 +418,7 @@ Django REST Framework(以下简称DRF)是著名开源组织[encode](https://www.
 
 #### 1. 开发过程
 
-创建python虚拟环境、Django项目初始化相关的流程由于比较冗长，涉及到的上下文信息比较多，这里就不再赘述，感兴趣可以去看[Django官方文档](https://docs.djangoproject.com/en/4.0/)和[Django REST Framework官方文档](https://www.django-rest-framework.org)，我们现在只关注他是怎么描述Schema的。
+创建python虚拟环境、Django项目初始化相关的流程和上下文信息较多，这里就不再赘述，感兴趣可以去看[Django官方文档](https://docs.djangoproject.com/en/4.0/)和[Django REST Framework官方文档](https://www.django-rest-framework.org)，我们现在只关注他是怎么描述Schema的。
 
 在DRF中，描述数据model的结构叫做Serializer。官方提供了非常多的内置的序列化方法，包括各种可接受的数据类型，然后用户在定义Serializer的时候使用kwargs为各个参数字段添加约束信息。serializer.Serializer类本身提供了 request → serializer → response 数据流的转化能力。用户只需要继承这些能力即可。例如
 
@@ -438,25 +434,41 @@ class SnippetSerializer(serializers.Serializer):
     language = serializers.ChoiceField(choices=LANGUAGE_CHOICES, default='python')
 ```
 
-也提供了直接继承Django Model的能力
+也提供了直接继承Django Model的能力，下面是一个完整的Student CURD的示例
 
 ```python
-class Snippet(models.Model):
-    created = models.DateTimeField(auto_now_add=True)
-    title = models.CharField(max_length=100, blank=True, default='')
-    code = models.TextField()
-    linenos = models.BooleanField(default=False)
-    language = models.CharField(choices=LANGUAGE_CHOICES, default='python', max_length=100)
-    style = models.CharField(choices=STYLE_CHOICES, default='friendly', max_length=100)
+# models.py
+class Student(models.Model):
+    class YearInSchool(models.TextChoices):
+        FRESHMAN = "FR", "Freshman"
+        SOPHOMORE = "SO", "Sophomore"
+        JUNIOR = "JR", "Junior"
+        SENIOR = "SR", "Senior"
+        GRADUATE = "GR", "Graduate"
+    name = models.CharField(max_length=100, help_text="学生姓名")
+    year_in_school = models.CharField(
+        max_length=2,
+        choices=YearInSchool.choices,
+        default=YearInSchool.FRESHMAN,
+        help_text="该学生所在的学年",
+    )
+    date_of_birth = models.DateField(help_text="该学生的生日")
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
 
     class Meta:
-        ordering = ['created']
+        ordering = ["created_at"]
 
-
-class SnippetSerializer(serializers.ModelSerializer):
+# serializers.py
+class StudentSerializer(serializers.ModelSerializer):
     class Meta:
-        model = Snippet
+        model = Student
         fields = "__all__"
+
+# views.py
+class StudentView(viewsets.ModelViewSet):
+    serializer_class = StudentSerializer
+    queryset = Student.objects.all()
 ```
 
 #### 2. OAS的实现方式
@@ -486,37 +498,7 @@ class SnippetSerializer(serializers.ModelSerializer):
 
 ##### 1. 编写业务逻辑main.py
 
-```python
-from typing import Optional
-
-from fastapi import FastAPI
-from pydantic import BaseModel, Field
-
-app = FastAPI()
-
-
-class Item(BaseModel):
-    id: Optional[int] = None
-    name: str = Field(description="The name of the item", regex="^[a-zA-Z0-9]*$")
-    price: float
-    is_offer: Optional[bool] = None
-
-
-@app.get("/")
-def read_root():
-    return {"Hello": "World"}
-
-
-@app.get("/items/{item_id}")
-def read_item(item_id: int, q: Optional[str] = None):
-    return {"item_id": item_id, "q": q}
-
-
-@app.post("/items")
-def create_item(item: Item) -> Item:
-    return item
-
-```
+查看[main.py](./python/fastapi_example/main.py)
 
 ##### 2. 使用uvicorn启动服务
 
@@ -526,33 +508,45 @@ uvicorn main:app
 
 #### 2. OAS的实现方式
 
-通过Python提供的类型注解功能，程序在启动的时候，就能够得到所有入参内容、和返回结果，包括他们的类型信息。开发体验更像是直接写好处理逻辑的函数，然后框架把这些函数按照一定的规则用HTTP的形式实现。
+通过Python提供的类型注解功能，程序在启动的时候，在装饰器的地方就能够得到所装饰的函数的所有入参内容、和返回结果，以此为依据生成加上路由信息，和装饰器内提供的其他参数信息，一起生成OpenAPI中所需的内容。
+包括他们的类型信息。开发体验更像是直接写好处理逻辑的函数，然后框架把这些函数按照一定的规则用HTTP的形式实现。
 
 #### 3. 优点
 
 1. 所见即所得，开发接口的时候非常直观，效率很高，而且提供了十分丰富的其他功能使得参数可以复用。
-2. 设计清晰易懂，用户层面不需要知道太多细节，不强制添加对应的类型注解（当然对应的也就无法得到足够的文档信息）
+2. 设计清晰易懂，用户层面不需要知道太多细节，用户可以按需要添加对应的类型注解。
 3. 可以直接利用python语言提供的强大生态资源。
 
 #### 4. 缺点
 
-1. 除了语言与公司技术栈不太相符外，找不到明显的缺点。
+1. 与公司技术栈不太匹配。
 
 ### 7. Poem
 
+该框架是当前Rust语言下百花齐放的各种异步Web框架中的第一个支持OpenAPI的框架。虽然发布时间不久，但是已经提供了比较完善的支持。
+
 #### 1. 开发过程
 
+这里采用官方用例提供的一个模拟用户CURD的例子
+查看代码[main.rs](./rust/poem/src/main.rs)
+
 #### 2. OAS的实现方式
 
-WIP
+1. 字段属性、路由信息采用poem-openapi-derive库提供的宏来描述
+2. 函数的入参和返回用于判断接口的Request和Response，这里有点类似FastAPI，只不过python用的类型注解来判断参数类型，rust使用的是泛型。
+3. 编译的时候，这些宏在全部展开，配合[Doc Comment](https://doc.rust-lang.org/rust-by-example/meta/doc.html)可以得到OpenAPI所需的全部信息。
+
 
 #### 3. 优点
 
-WIP
+1. Rust语言提供零成本抽象能力、零GC、保证内存安全等特性使其性能非常优异。而且语言为用户提供了非常丰富的抽象能力、和特性。
+2. 框架本身提供的宏非常简洁。Go1.18宏正式启用后，可以调研是否可以借鉴思想。
+
 
 #### 4. 缺点
 
-WIP
+1. Rust的学习成本比起Go语言要高，市场上相关人才比较少。
+2. 框架太年轻了，需要经过时间和开发者的考验。
 
 ## 4. FAQ
 
diff --git a/python/drf_example/drf_example/animals/__init__.py b/python/drf_example/drf_example/animals/__init__.py
new file mode 100644
index 0000000..e69de29
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diff --git a/python/drf_example/drf_example/animals/admin.py b/python/drf_example/drf_example/animals/admin.py
new file mode 100644
index 0000000..8c38f3f
--- /dev/null
+++ b/python/drf_example/drf_example/animals/admin.py
@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.
diff --git a/python/drf_example/drf_example/animals/apps.py b/python/drf_example/drf_example/animals/apps.py
new file mode 100644
index 0000000..c41249c
--- /dev/null
+++ b/python/drf_example/drf_example/animals/apps.py
@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class AnimalsConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "animals"
diff --git a/python/drf_example/drf_example/animals/migrations/0001_initial.py b/python/drf_example/drf_example/animals/migrations/0001_initial.py
new file mode 100644
index 0000000..43baaad
--- /dev/null
+++ b/python/drf_example/drf_example/animals/migrations/0001_initial.py
@@ -0,0 +1,28 @@
+# Generated by Django 4.0.3 on 2022-03-10 10:21
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Student',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(help_text='学生姓名', max_length=100)),
+                ('year_in_school', models.CharField(choices=[('FR', 'Freshman'), ('SO', 'Sophomore'), ('JR', 'Junior'), ('SR', 'Senior'), ('GR', 'Graduate')], default='FR', help_text='该学生所在的学年', max_length=2)),
+                ('date_of_birth', models.DateField(help_text='该学生的生日')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                'ordering': ['created_at'],
+            },
+        ),
+    ]
diff --git a/python/drf_example/drf_example/animals/migrations/__init__.py b/python/drf_example/drf_example/animals/migrations/__init__.py
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diff --git a/python/drf_example/drf_example/animals/models.py b/python/drf_example/drf_example/animals/models.py
new file mode 100644
index 0000000..4bec762
--- /dev/null
+++ b/python/drf_example/drf_example/animals/models.py
@@ -0,0 +1,27 @@
+from django.db import models
+
+# Create your models here.
+
+
+class YearInSchool(models.TextChoices):
+    FRESHMAN = "FR", "Freshman"
+    SOPHOMORE = "SO", "Sophomore"
+    JUNIOR = "JR", "Junior"
+    SENIOR = "SR", "Senior"
+    GRADUATE = "GR", "Graduate"
+
+
+class Student(models.Model):
+    name = models.CharField(max_length=100, help_text="学生姓名")
+    year_in_school = models.CharField(
+        max_length=2,
+        choices=YearInSchool.choices,
+        default=YearInSchool.FRESHMAN,
+        help_text="该学生所在的学年",
+    )
+    date_of_birth = models.DateField(help_text="该学生的生日")
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        ordering = ["created_at"]
diff --git a/python/drf_example/drf_example/animals/serializers.py b/python/drf_example/drf_example/animals/serializers.py
new file mode 100644
index 0000000..a0114eb
--- /dev/null
+++ b/python/drf_example/drf_example/animals/serializers.py
@@ -0,0 +1,8 @@
+from rest_framework import serializers
+from .models import Student
+
+
+class StudentSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Student
+        fields = "__all__"
diff --git a/python/drf_example/drf_example/animals/tests.py b/python/drf_example/drf_example/animals/tests.py
new file mode 100644
index 0000000..7ce503c
--- /dev/null
+++ b/python/drf_example/drf_example/animals/tests.py
@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.
diff --git a/python/drf_example/drf_example/animals/views.py b/python/drf_example/drf_example/animals/views.py
new file mode 100644
index 0000000..50e0fe8
--- /dev/null
+++ b/python/drf_example/drf_example/animals/views.py
@@ -0,0 +1,8 @@
+from rest_framework import viewsets
+from .serializers import StudentSerializer
+from .models import Student
+
+
+class StudentView(viewsets.ModelViewSet):
+    serializer_class = StudentSerializer
+    queryset = Student.objects.all()
diff --git a/python/drf_example/drf_example/drf_example/__init__.py b/python/drf_example/drf_example/drf_example/__init__.py
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diff --git a/python/drf_example/drf_example/drf_example/asgi.py b/python/drf_example/drf_example/drf_example/asgi.py
new file mode 100644
index 0000000..34e0edc
--- /dev/null
+++ b/python/drf_example/drf_example/drf_example/asgi.py
@@ -0,0 +1,16 @@
+"""
+ASGI config for drf_example project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.0/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'drf_example.settings')
+
+application = get_asgi_application()
diff --git a/python/drf_example/drf_example/drf_example/settings.py b/python/drf_example/drf_example/drf_example/settings.py
new file mode 100644
index 0000000..187a5a8
--- /dev/null
+++ b/python/drf_example/drf_example/drf_example/settings.py
@@ -0,0 +1,125 @@
+"""
+Django settings for drf_example project.
+
+Generated by 'django-admin startproject' using Django 4.0.3.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.0/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/4.0/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = "django-insecure-gt64$h6a$cmx_7&)g2bs=h1q@)-a_cq)vq(zit%mj#2xnch9t*"
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    "django.contrib.admin",
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sessions",
+    "django.contrib.messages",
+    "django.contrib.staticfiles",
+    "rest_framework",
+    "animals",
+]
+
+MIDDLEWARE = [
+    "django.middleware.security.SecurityMiddleware",
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.common.CommonMiddleware",
+    "django.middleware.csrf.CsrfViewMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    "django.contrib.messages.middleware.MessageMiddleware",
+    "django.middleware.clickjacking.XFrameOptionsMiddleware",
+]
+
+ROOT_URLCONF = "drf_example.urls"
+
+TEMPLATES = [
+    {
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [BASE_DIR / "templates"],
+        "APP_DIRS": True,
+        "OPTIONS": {
+            "context_processors": [
+                "django.template.context_processors.debug",
+                "django.template.context_processors.request",
+                "django.contrib.auth.context_processors.auth",
+                "django.contrib.messages.context_processors.messages",
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = "drf_example.wsgi.application"
+
+
+# Database
+# https://docs.djangoproject.com/en/4.0/ref/settings/#databases
+
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": BASE_DIR / "db.sqlite3",
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/4.0/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
+    },
+    {
+        "NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",
+    },
+    {
+        "NAME": "django.contrib.auth.password_validation.CommonPasswordValidator",
+    },
+    {
+        "NAME": "django.contrib.auth.password_validation.NumericPasswordValidator",
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/4.0/topics/i18n/
+
+LANGUAGE_CODE = "en-us"
+
+TIME_ZONE = "UTC"
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/4.0/howto/static-files/
+
+STATIC_URL = "static/"
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
diff --git a/python/drf_example/drf_example/drf_example/urls.py b/python/drf_example/drf_example/drf_example/urls.py
new file mode 100644
index 0000000..5e5e720
--- /dev/null
+++ b/python/drf_example/drf_example/drf_example/urls.py
@@ -0,0 +1,44 @@
+"""drf_example URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/4.0/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path, include
+from django.views.generic import TemplateView
+from rest_framework import routers
+from rest_framework.schemas import get_schema_view
+from animals.views import StudentView
+
+router = routers.DefaultRouter()
+router.register("student", StudentView)
+
+urlpatterns = [
+    path("", include(router.urls)),
+    path("admin/", admin.site.urls),
+    path(
+        "swagger/",
+        TemplateView.as_view(
+            template_name="swagger.html",
+            extra_context={"schema_url": "openapi-schema"},
+        ),
+        name="swagger-ui",
+    ),
+    path(
+        "openapi",
+        get_schema_view(
+            title="Your Project", description="API for all things …", version="1.0.0"
+        ),
+        name="openapi-schema",
+    ),
+]
diff --git a/python/drf_example/drf_example/drf_example/wsgi.py b/python/drf_example/drf_example/drf_example/wsgi.py
new file mode 100644
index 0000000..e6591fb
--- /dev/null
+++ b/python/drf_example/drf_example/drf_example/wsgi.py
@@ -0,0 +1,16 @@
+"""
+WSGI config for drf_example project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.0/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'drf_example.settings')
+
+application = get_wsgi_application()
diff --git a/python/drf_example/drf_example/manage.py b/python/drf_example/drf_example/manage.py
new file mode 100755
index 0000000..3fd76b6
--- /dev/null
+++ b/python/drf_example/drf_example/manage.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'drf_example.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/python/drf_example/drf_example/openapi-schema.yml b/python/drf_example/drf_example/openapi-schema.yml
new file mode 100644
index 0000000..56ab697
--- /dev/null
+++ b/python/drf_example/drf_example/openapi-schema.yml
@@ -0,0 +1,176 @@
+openapi: 3.0.2
+info:
+  title: ''
+  version: ''
+paths:
+  /student/:
+    get:
+      operationId: listStudents
+      description: ''
+      parameters: []
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Student'
+          description: ''
+      tags:
+      - student
+    post:
+      operationId: createStudent
+      description: ''
+      parameters: []
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/Student'
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/Student'
+          multipart/form-data:
+            schema:
+              $ref: '#/components/schemas/Student'
+      responses:
+        '201':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Student'
+          description: ''
+      tags:
+      - student
+  /student/{id}/:
+    get:
+      operationId: retrieveStudent
+      description: ''
+      parameters:
+      - name: id
+        in: path
+        required: true
+        description: A unique integer value identifying this student.
+        schema:
+          type: string
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Student'
+          description: ''
+      tags:
+      - student
+    put:
+      operationId: updateStudent
+      description: ''
+      parameters:
+      - name: id
+        in: path
+        required: true
+        description: A unique integer value identifying this student.
+        schema:
+          type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/Student'
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/Student'
+          multipart/form-data:
+            schema:
+              $ref: '#/components/schemas/Student'
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Student'
+          description: ''
+      tags:
+      - student
+    patch:
+      operationId: partialUpdateStudent
+      description: ''
+      parameters:
+      - name: id
+        in: path
+        required: true
+        description: A unique integer value identifying this student.
+        schema:
+          type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/Student'
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/Student'
+          multipart/form-data:
+            schema:
+              $ref: '#/components/schemas/Student'
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Student'
+          description: ''
+      tags:
+      - student
+    delete:
+      operationId: destroyStudent
+      description: ''
+      parameters:
+      - name: id
+        in: path
+        required: true
+        description: A unique integer value identifying this student.
+        schema:
+          type: string
+      responses:
+        '204':
+          description: ''
+      tags:
+      - student
+components:
+  schemas:
+    Student:
+      type: object
+      properties:
+        id:
+          type: integer
+          readOnly: true
+        name:
+          type: string
+          description: "\u5B66\u751F\u59D3\u540D"
+          maxLength: 100
+        year_in_school:
+          enum:
+          - FR
+          - SO
+          - JR
+          - SR
+          - GR
+          type: string
+          description: "\u8BE5\u5B66\u751F\u6240\u5728\u7684\u5B66\u5E74"
+        date_of_birth:
+          type: string
+          format: date
+          description: "\u8BE5\u5B66\u751F\u7684\u751F\u65E5"
+        created_at:
+          type: string
+          format: date-time
+          readOnly: true
+        updated_at:
+          type: string
+          format: date-time
+          readOnly: true
+      required:
+      - name
+      - date_of_birth
diff --git a/python/drf_example/drf_example/templates/swagger.html b/python/drf_example/drf_example/templates/swagger.html
new file mode 100644
index 0000000..cbe47f1
--- /dev/null
+++ b/python/drf_example/drf_example/templates/swagger.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <title>Swagger</title>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="stylesheet" type="text/css" href="//unpkg.com/swagger-ui-dist@3/swagger-ui.css" />
+</head>
+
+<body>
+  <div id="swagger-ui"></div>
+  <script src="//unpkg.com/swagger-ui-dist@3/swagger-ui-bundle.js"></script>
+  <script>
+    const ui = SwaggerUIBundle({
+      url: "{% url schema_url %}",
+      dom_id: '#swagger-ui',
+      presets: [
+        SwaggerUIBundle.presets.apis,
+        SwaggerUIBundle.SwaggerUIStandalonePreset
+      ],
+      layout: "BaseLayout",
+      requestInterceptor: (request) => {
+        request.headers['X-CSRFToken'] = "{{ csrf_token }}"
+        return request;
+      }
+    })
+  </script>
+</body>
+
+</html>
diff --git a/python/drf_example/poetry.lock b/python/drf_example/poetry.lock
new file mode 100644
index 0000000..76f6bbf
--- /dev/null
+++ b/python/drf_example/poetry.lock
@@ -0,0 +1,149 @@
+[[package]]
+name = "asgiref"
+version = "3.5.0"
+description = "ASGI specs, helper code, and adapters"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+tests = ["pytest", "pytest-asyncio", "mypy (>=0.800)"]
+
+[[package]]
+name = "django"
+version = "4.0.3"
+description = "A high-level Python web framework that encourages rapid development and clean, pragmatic design."
+category = "main"
+optional = false
+python-versions = ">=3.8"
+
+[package.dependencies]
+asgiref = ">=3.4.1,<4"
+sqlparse = ">=0.2.2"
+tzdata = {version = "*", markers = "sys_platform == \"win32\""}
+
+[package.extras]
+argon2 = ["argon2-cffi (>=19.1.0)"]
+bcrypt = ["bcrypt"]
+
+[[package]]
+name = "djangorestframework"
+version = "3.13.1"
+description = "Web APIs for Django, made easy."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+django = ">=2.2"
+pytz = "*"
+
+[[package]]
+name = "pytz"
+version = "2021.3"
+description = "World timezone definitions, modern and historical"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "pyyaml"
+version = "6.0"
+description = "YAML parser and emitter for Python"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "sqlparse"
+version = "0.4.2"
+description = "A non-validating SQL parser."
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "tzdata"
+version = "2021.5"
+description = "Provider of IANA time zone data"
+category = "main"
+optional = false
+python-versions = ">=2"
+
+[[package]]
+name = "uritemplate"
+version = "4.1.1"
+description = "Implementation of RFC 6570 URI Templates"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[metadata]
+lock-version = "1.1"
+python-versions = "^3.10"
+content-hash = "e74b47a6538a1b28c9531278ec4708c89167a7cd1e406f17c9f0cc029c15d115"
+
+[metadata.files]
+asgiref = [
+    {file = "asgiref-3.5.0-py3-none-any.whl", hash = "sha256:88d59c13d634dcffe0510be048210188edd79aeccb6a6c9028cdad6f31d730a9"},
+    {file = "asgiref-3.5.0.tar.gz", hash = "sha256:2f8abc20f7248433085eda803936d98992f1343ddb022065779f37c5da0181d0"},
+]
+django = [
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diff --git a/python/drf_example/pyproject.toml b/python/drf_example/pyproject.toml
new file mode 100644
index 0000000..7f94b92
--- /dev/null
+++ b/python/drf_example/pyproject.toml
@@ -0,0 +1,18 @@
+[tool.poetry]
+name = "drf_example"
+version = "0.1.0"
+description = ""
+authors = ["CaptainNEO <tianpengfei@rcrai.com>"]
+
+[tool.poetry.dependencies]
+python = "^3.10"
+Django = "^4.0.3"
+djangorestframework = "^3.13.1"
+PyYAML = "^6.0"
+uritemplate = "^4.1.1"
+
+[tool.poetry.dev-dependencies]
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
diff --git a/python/fastapi_example/main.py b/python/fastapi_example/main.py
index 76093c4..697eae0 100644
--- a/python/fastapi_example/main.py
+++ b/python/fastapi_example/main.py
@@ -13,16 +13,34 @@ class Item(BaseModel):
     is_offer: Optional[bool] = None
 
 
+db = {
+    1: Item(id=1, name="Foo", price=19.99),
+    2: Item(id=2, name="Bar", price=29.99),
+    3: Item(id=3, name="Baz", price=39.99),
+}
+
+
 @app.get("/")
-def read_root():
-    return {"Hello": "World"}
+def get_items(
+    limit: int = 10,
+    offset: int = Field(0, description="db offset"),
+    q: Optional[str] = None,
+):
+    print(limit, offset, q)
+    return [
+        {"item": db[k], "price": db[k].price}
+        for k in sorted(db.keys())[offset : offset + limit]
+    ]
 
 
 @app.get("/items/{item_id}")
-def read_item(item_id: int, q: Optional[str] = None):
-    return {"item_id": item_id, "q": q}
+def read_item(item_id: int):
+    return db[item_id]
 
 
 @app.post("/items")
 def create_item(item: Item) -> Item:
+    pid = list(db.keys())[-1] + 1
+    item.id = pid
+    db[pid] = item
     return item
diff --git a/rust/poem/.gitignore b/rust/poem/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/rust/poem/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/rust/poem/Cargo.lock b/rust/poem/Cargo.lock
new file mode 100644
index 0000000..52a7a91
--- /dev/null
+++ b/rust/poem/Cargo.lock
@@ -0,0 +1,1425 @@
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diff --git a/rust/poem/Cargo.toml b/rust/poem/Cargo.toml
new file mode 100644
index 0000000..eb31b5a
--- /dev/null
+++ b/rust/poem/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+poem = "1.3.13"
+poem-openapi = { version = "1.3.13", features = [
+  "email",
+  "swagger-ui",
+  "rapidoc",
+  "redoc",
+] }
+tokio = { version = "1.17.0", features = ["macros", "rt-multi-thread"] }
+tracing-subscriber = "0.3.9"
+slab = "0.4.5"
diff --git a/rust/poem/src/main.rs b/rust/poem/src/main.rs
new file mode 100644
index 0000000..b94ffed
--- /dev/null
+++ b/rust/poem/src/main.rs
@@ -0,0 +1,149 @@
+use poem::{listener::TcpListener, Route, Server};
+use poem_openapi::{
+    param::Path,
+    payload::Json,
+    types::{Email, Password},
+    ApiResponse, Object, OpenApi, OpenApiService, Tags,
+};
+use slab::Slab;
+use tokio::sync::Mutex;
+
+#[derive(Tags)]
+enum ApiTags {
+    /// Operations about user
+    User,
+}
+
+/// Create user schema
+#[derive(Debug, Object, Clone, Eq, PartialEq)]
+struct User {
+    /// Id
+    #[oai(read_only)]
+    id: i64,
+    /// Name
+    #[oai(validator(max_length = 64))]
+    name: String,
+    /// Password
+    #[oai(validator(max_length = 32))]
+    password: Password,
+    email: Email,
+}
+
+/// Update user schema
+#[derive(Debug, Object, Clone, Eq, PartialEq)]
+struct UpdateUser {
+    /// Name
+    name: Option<String>,
+    /// Password
+    password: Option<Password>,
+}
+
+#[derive(ApiResponse)]
+enum CreateUserResponse {
+    /// Returns when the user is successfully created.
+    #[oai(status = 200)]
+    Ok(Json<i64>),
+}
+
+#[derive(ApiResponse)]
+enum FindUserResponse {
+    /// Return the specified user.
+    #[oai(status = 200)]
+    Ok(Json<User>),
+    /// Return when the specified user is not found.
+    #[oai(status = 404)]
+    NotFound,
+}
+
+#[derive(ApiResponse)]
+enum DeleteUserResponse {
+    /// Returns when the user is successfully deleted.
+    #[oai(status = 200)]
+    Ok,
+    /// Return when the specified user is not found.
+    #[oai(status = 404)]
+    NotFound,
+}
+
+#[derive(ApiResponse)]
+enum UpdateUserResponse {
+    /// Returns when the user is successfully updated.
+    #[oai(status = 200)]
+    Ok,
+    /// Return when the specified user is not found.
+    #[oai(status = 404)]
+    NotFound,
+}
+
+#[derive(Default)]
+struct Api {
+    users: Mutex<Slab<User>>,
+}
+
+#[OpenApi]
+impl Api {
+    /// Create a new user
+    #[oai(path = "/users", method = "post", tag = "ApiTags::User")]
+    async fn create_user(&self, user: Json<User>) -> CreateUserResponse {
+        let mut users = self.users.lock().await;
+        let id = users.insert(user.0) as i64;
+        CreateUserResponse::Ok(Json(id))
+    }
+
+    /// Find user by id
+    #[oai(path = "/users/:user_id", method = "get", tag = "ApiTags::User")]
+    async fn find_user(&self, user_id: Path<i64>) -> FindUserResponse {
+        let users = self.users.lock().await;
+        match users.get(user_id.0 as usize) {
+            Some(user) => FindUserResponse::Ok(Json(user.clone())),
+            None => FindUserResponse::NotFound,
+        }
+    }
+
+    /// Delete user by id
+    #[oai(path = "/users/:user_id", method = "delete", tag = "ApiTags::User")]
+    async fn delete_user(&self, user_id: Path<i64>) -> DeleteUserResponse {
+        let mut users = self.users.lock().await;
+        let user_id = user_id.0 as usize;
+        if users.contains(user_id) {
+            users.remove(user_id);
+            DeleteUserResponse::Ok
+        } else {
+            DeleteUserResponse::NotFound
+        }
+    }
+
+    /// Update user by id
+    #[oai(path = "/users/:user_id", method = "put", tag = "ApiTags::User")]
+    async fn put_user(&self, user_id: Path<i64>, update: Json<UpdateUser>) -> UpdateUserResponse {
+        let mut users = self.users.lock().await;
+        match users.get_mut(user_id.0 as usize) {
+            Some(user) => {
+                if let Some(name) = update.0.name {
+                    user.name = name;
+                }
+                if let Some(password) = update.0.password {
+                    user.password = password;
+                }
+                UpdateUserResponse::Ok
+            }
+            None => UpdateUserResponse::NotFound,
+        }
+    }
+}
+
+#[tokio::main]
+async fn main() -> Result<(), std::io::Error> {
+    if std::env::var_os("RUST_LOG").is_none() {
+        std::env::set_var("RUST_LOG", "poem=debug");
+    }
+    tracing_subscriber::fmt::init();
+
+    let api_service =
+        OpenApiService::new(Api::default(), "Users", "1.0").server("http://localhost:3000/api");
+    let ui = api_service.rapidoc();
+
+    Server::new(TcpListener::bind("127.0.0.1:3000"))
+        .run(Route::new().nest("/api", api_service).nest("/", ui))
+        .await
+}