Flask的请求拓展
from flask import Flask,request,render_template
app = Flask(__name__)
# @app.before_request
# def befor1():
# print(request)
# print("我是请求之前1")
# return "123"
# @app.before_request
# def befor2():
# print("我是请求之前2")
#
# @app.after_request
# def after1(response):
# print("我是请求之后1")
# return response
#
# @app.after_request
# def after2(response):
# print("我是请求之后2")
# return response
# @app.before_first_request
# def before_first():
# print("123")
#如论有没有异常都会执行，如果没有异常这个参数就是None，有就记录这个异常
# @app.teardown_request
# def tear(e):
# print('teardown_request')
# print(e)
#捕获异常，如果出现异常，而且状态就是@app.errorhandler(404),
@app.errorhandler(404)
def error_404(arg):
print(arg)
return "404错误了"
# @app.errorhandler(500)
# def error(arg):
# print(arg)
# return "500错误了"
@app.template_global()
def sb(a1, a2):
return a1 + a2
@app.template_filter()
def db(a1, a2, a3):
print(a1,a2,a3)
return a1 + a2 + a3
@app.route('/index')
def index():
print("我是真的视图")
return render_template("index.html")
if __name__ == '__main__':
# app.__call__
app.run()
