例子1
# -*- coding: utf-8 -*-
#路由与反向路由
from flask import Flask
from flask import request
from flask import url_for
app=Flask(__name__)
#@app.route为路由,"/"是根目录
@app.route('/')
def hello_world():
return 'hello world'
#用methods来指定传输方式
@app.route('/user',methods=['GET','POST'])
def hello_user():
return 'hello user'
#参数传递,这里指定为"id"
@app.route('/user/<id>')
def hello_userid(id):
return 'hello userid:'+id
#根据键值对返回id
@app.route('/query_user')
def query_user():
id=request.args.get('id')
return 'query_user:'+id
#反向函数:通过视图反导出URL地址
#返回的是“query_url:/query_user”,通过url_for通过end point访问query_user
@app.route('/query_url')
def quer_url():
return 'query_url:'+url_for('query_user')
if __name__=='__main__':
app.run(debug=True,port=7777)
反向路由
URL**–>endpoint–>**viewfunction
反向路由传参
https://www.cnblogs.com/captainmeng/p/8572833.html
例子2
from flask import Flask
from flask.ext.restful import reqparse, abort, Api, Resource
app = Flask(__name__)
api = Api(app)
TODOS = {
'todo1': {'task': 'build an API'},
'todo2': {'task': '?????'},
'todo3': {'task': 'profit!'},
}
def abort_if_todo_doesnt_exist(todo_id):
if todo_id not in TODOS:
abort(404, message="Todo {} doesn't exist".format(todo_id))
parser = reqparse.RequestParser()
parser.add_argument('task', type=str)
# Todo
# show a single todo item and lets you delete them
class Todo(Resource):
def get(self, todo_id):
abort_if_todo_doesnt_exist(todo_id)
return TODOS[todo_id]
def delete(self, todo_id):
abort_if_todo_doesnt_exist(todo_id)
del TODOS[todo_id]
return '', 204
def put(self, todo_id):
args = parser.parse_args()
task = {'task': args['task']}
TODOS[todo_id] = task
return task, 201
# TodoList
# shows a list of all todos, and lets you POST to add new tasks
class TodoList(Resource):
def get(self):
return TODOS
def post(self):
args = parser.parse_args()
todo_id = int(max(TODOS.keys()).lstrip('todo')) + 1
todo_id = 'todo%i' % todo_id
TODOS[todo_id] = {'task': args['task']}
return TODOS[todo_id], 201
##
## Actually setup the Api resource routing here
##
api.add_resource(TodoList, '/todos')
api.add_resource(Todo, '/todos/<todo_id>')
if __name__ == '__main__':
app.run(debug=True)