1. 构建基本的RESTful API

创建一个api，在内容中存放和获取提交的task数据。

from flask import Flask, abort, request, jsonify

app = Flask(__name__)
tasks = []


@app.route('/add/', methods=['POST'])
def add_task():
    if not request.json:
        abort(400)
    task = {
        'id': request.json['id'],
        'description': request.json['description']
    }
    task_old = list(filter(lambda t: t['id'] == int(task.id), tasks))
    if len(task_old) > 0:
        return jsonify({'result': 'task already exist'})
    else:
        tasks.append(task)
        return jsonify({'result': 'add successfully'})


@app.route('/get/', methods=['GET'])
def get_task():
    if not request.args or 'id' not in request.args:
        # 没有指定id则返回全部
        return jsonify(tasks)
    else:
        task_id = request.args['id']
        task = list(filter(lambda t: t['id'] == int(task_id), tasks))
        return jsonify(task[0]) if len(task)>0 else jsonify({'result': 'not found'})


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

执行add请求发送数据

post.png

在Postman中执行get请求

get.png

2. 用扩展库flask-restful

安装flask-restful

pip install flask-restful

from flask import Flask
from flask_restful import reqparse, Api, Resource, request

app = Flask(__name__)
api = Api(app)
parser = reqparse.RequestParser()

tasks = []


class Task(Resource):
    def get(self):
        return tasks

    def post(self):
       # 如果请求类型是json，用request.json
       # 如果请求类型是x-www-form-urlencoded，用request.form
        task = request.json
        task_old = list(filter(lambda t: t['id'] == int(task.id), tasks))
        if len(task_old) > 0:
            return {'result': 'task already exist'}
        else:
            tasks.append(task)
            return {'result': 'add successfully'}


# 设置路由
api.add_resource(Task, '/tasks/')

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

Post提交数据

image.png

Get请求数据

image.png