10Flask的请求拓展

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()

来源：https://www.cnblogs.com/suren-apan/p/11966123.html