Flask实现RESTful API

pip install flask_restful

from flask_restful import Api
from myapp.api import *

api = Api()

def init_api(app):
    api.init_app(app)

api.add_resource(One,‘/one‘)
api.add_resource(Two,‘/two‘)
api.add_resource(Three,‘/three/‘)
api.add_resource(Four,‘/four//‘)
api.add_resource(Five,‘/five‘)
api.add_resource(Six,‘/six‘)
api.add_resource(Seven,‘/seven‘)

from flask import Flask
from myapp.api_urls import init_api
from myapp.ext import init_ext
from myapp.settings import conf


def create_app(env_name):
    app = Flask(__name__)

    app.config.from_object(conf.get(env_name,‘debug‘))

    init_ext(app)

    init_api(app)
    return app

from flask import request
from flask_restful import Resource, marshal_with, fields, reqparse
from myapp.models import *

#输出字段
#字典套字符串
one_fields = {
    ‘id‘:fields.Integer(default=1),                   #default设置为默认值
    ‘user‘:fields.String(attribute=‘name‘),　　　　　　 #attribute设置为映射到models中的name字段
    ‘content‘:fields.String,
    ‘hahaha‘:fields.String(default=‘lalala‘)
}
class One(Resource):
    @marshal_with(one_fields)
    def get(self,*args,**kwargs):
        id = int(request.args.get(‘id‘))
        data = News.query.get(id)
        return data

#字典套列表
two_fields = {
    ‘id‘:fields.Integer(default=1),
    ‘name‘:fields.String(default=‘wusir‘),
    ‘hobby‘:fields.List(fields.String)
}
class Two(Resource):
    @marshal_with(two_fields)
    def get(self):
        hobby = [‘阅读‘,‘运动‘,‘敲代码‘]
        return {‘hobby‘:hobby}

#字典套字典
three_fields = {
    ‘id‘: fields.Integer(default=1),
    ‘name‘: fields.String(default=‘alex‘),
    ‘content‘:fields.Nested(one_fields)
}
class Three(Resource):
    @marshal_with(three_fields)
    def get(self,id):
        news = News.query.get(id)
        return {‘content‘:news}

#字典套列表，列表再套字典
four_fields = {
    ‘id‘:fields.Integer(default=1),
    ‘name‘:fields.String(default=‘wusir‘),
    ‘content‘:fields.List(fields.Nested(one_fields))
}
class Four(Resource):
    @marshal_with(four_fields)
    def get(self,page,per_page):
        news = News.query.paginate(page,per_page,error_out=False)   #分页实现
        return {‘content‘:news.items}


#参数解析
five_args = reqparse.RequestParser()
five_args.add_argument(‘id‘,type=int,required=True,help=‘id是必填字段，赶紧的填上‘)  #required为True表示是必填字段，help为错误提示信息
five_args.add_argument(‘name‘,dest=‘my_name‘)     #dest表示起别名
five_args.add_argument(‘hobby‘,action=‘append‘)    #action=‘append‘表示字段可以追加写多个
class Five(Resource):
    def get(self):
        my_args = five_args.parse_args()
        print(my_args)
        print(my_args.get(‘hobby‘))
        return {‘msg‘:‘ok‘}


six_args = reqparse.RequestParser()
six_args.add_argument(‘content‘,location=‘form‘)
class Six(Resource):
    def get(self):
        my_args = six_args.parse_args()
        print(my_args)
        return {‘msg‘:‘get‘}
    def post(self):
        my_args = six_args.parse_args()
        print(my_args)
        return {‘msg‘:‘post‘}


seven_args = five_args.copy()
seven_args.replace_argument(‘id‘,type=int,help=‘随便你填不填‘,required=True)
seven_args.remove_argument(‘name‘)
seven_args.remove_argument(‘hobby‘)
class Seven(Resource):
    def get(self):
        my_args = seven_args.parse_args()
        print(my_args)
        return {‘msg‘:‘好了‘}

# 从post请求的form里拿参数
parser.add_argument(‘name‘, type=int, location=‘form‘)

# 从get请求的args里拿参数
parser.add_argument(‘PageSize‘, type=int, location=‘args‘)

# 从请求头拿参数 headers
parser.add_argument(‘User-Agent‘, location=‘headers‘)

# 从cookies拿参数
parser.add_argument(‘session_id‘, location=‘cookies‘)

# 获取文件
parser.add_argument(‘picture‘, type=werkzeug.datastructures.FileStorage, location=‘files‘)