Python | 使用Flask搭建一个API服务器

Posted 2021-05-29 Mculover666

一、API列表

1. 获取作品列表

① 获取手工制作作品列表。

请求格式：

http://api.mculover666.cn:9999/twkk/list/hand_made

返回结果：

{
	goods_num: 3,
	goods_item: [
		{
			goods_id: 1,
			goods_name: "goods1",
			goods_img_url: "xxx"
		},
		{
			goods_id: 2,
			goods_name: "goods1",
			goods_img_url: "xxx"
		},
		{
			goods_id: 3,
			goods_name: "goods1",
			goods_img_url: "xxx"
		}
	]
}

② 获取绘画作品列表。
请求格式：

http://api.mculover666.cn:9999/twkk/list/drawing

返回结果：

{
	goods_num: 3,
	goods_item: [
		{
			goods_id: 4,
			goods_name: "goods1",
			goods_img_url: "xxx"
		},
		{
			goods_id: 5,
			goods_name: "goods1",
			goods_img_url: "xxx"
		},
		{
			goods_id: 6,
			goods_name: "goods1",
			goods_img_url: "xxx"
		}
	]
}

③ 获取证书列表
请求格式：

http://api.mculover666.cn:9999/twkk/list/certificate

返回结果：

{
	goods_num: 3,
	goods_item: [
		{
			goods_id: 6,
			goods_name: "goods1",
			goods_img_url: "xxx"
		},
		{
			goods_id: 7,
			goods_name: "goods1",
			goods_img_url: "xxx"
		},
		{
			goods_id: 8,
			goods_name: "goods1",
			goods_img_url: "xxx"
		}
	]
}

二、安装Flask

打开命令行，创建一份python虚拟环境：

python3 -m venv venv

在当前终端激活虚拟环境：

.\\venv\\Scripts\\Activate.ps1

激活虚拟环境后，安装Flask：

pip install Flask

查看安装结果：

pip list

编写一个HelloWorld测试一下：

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Helloworld'

if __name__ == '__main__':
    app.run()

Flask参考教程：https://www.w3cschool.cn/flask/

三、代码实现

# 导入Flask类
from flask import Flask, redirect, url_for, render_template
import json

# 使用当前模块的名称构建Flask app
app = Flask(__name__)

# 装饰器，设置根目录url调用函数
@app.route('/twkk')
def index():
    version = "v1.0.0"
    return render_template('index.html', app_version=version)

# 管理员url
@app.route('/twkk/admin')
def hello_admin():
    return 'Hello admin'

# 获取分类列表
@app.route('/twkk/list/<category>', methods=["GET"])
def get_item_list(category):
    #读取json文件内容
    try:
        if category == 'drawing':
            with open('drawing.json', 'r') as fp:
                json_data = json.load(fp)
                res_data = json.dumps(json_data)
                return res_data
        elif category == 'hand_made':
            with open('hand_made.json', 'r') as fp:
                json_data = json.load(fp)
                res_data = json.dumps(json_data)
                return res_data
        elif category == 'certificate':
            with open('certificate.json', 'r') as fp:
                json_data = json.load(fp)
                res_data = json.dumps(json_data)
                return res_data
    except:
        return ""

# 运行程序
if __name__ == '__main__':
    app.run()

四、API测试

1. 根目录测试

/twkk

2. 列表拉取测试

curl localhost:5000/twkk/list/hand_made

curl localhost:5000/twkk/list/drawing

curl localhost:5000/twkk/list/certificate