227.3.flask路由

1

from flask import Flask

app = Flask(__name__)
app.config.from_object("settings.DevelopmentConfig")


@app.route("/index", methods=["POST", "GET"])
def index():
    pass


def order():
    return "order"


app.add_url_rule("/order", view_func=order)


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

2

# coding=utf-8
# coding=utf8
from flask import Flask, url_for

app = Flask(__name__)
app.config.from_object("settings.DevelopmentConfig")


@app.route("/index", methods=["POST", "GET"], endpoint="n1")
def index():
    v1 = url_for("n1")  # endpoint用于反向生成路由, 默认不起别名endpoint就是他的函数名
    v2 = url_for("n2")
    v3 = url_for("n3")


@app.route("/index", methods=["POST", "GET"], endpoint="n2")
def index2():
    pass


@app.route("/index", methods=["POST", "GET"], endpoint="n3")
def index3():
    pass


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

3

# coding=utf-8
# coding=utf8
from flask import Flask, url_for

app = Flask(__name__)
app.config.from_object("settings.DevelopmentConfig")


@app.route("/index/<int:nid>", methods=["POST", "GET"])
def index(nid):
    print(nid)  # url后面可以加一个uid, 比如/index/1
    return "index"


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

4

# coding=utf-8
"""自定义装换器"""
from flask import Flask, views, url_for
from werkzeug.routing import BaseConverter

app = Flask(import_name=__name__)


class RegexConverter(BaseConverter):
    """
    自定义URL匹配正则表达式
    """
    def __init__(self, map, regex):
        super(RegexConverter, self).__init__(map)
        self.regex = regex

    def to_python(self, value):
        """
        路由匹配时，匹配成功后传递给视图函数中参数的值
        :param value:
        :return:
        """
        return int(value)

    def to_url(self, value):
        """
        使用url_for反向生成URL时，传递的参数经过该方法处理，返回的值用于生成URL中的参数
        :param value:
        :return:
        """
        val = super(RegexConverter, self).to_url(value)
        return val


# 添加到flask中
app.url_map.converters['regex'] = RegexConverter


# 执行自定义转换器头to_python
@app.route('/index/<regex("\d+"):nid>')
def index(nid):
    # 执行自定义转换器to_url
    print(url_for('index', nid='888'))
    return 'Index'


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

5

# coding=utf-8
from flask import Flask

app = Flask(__name__)
app.config.from_object("settings.DevelopmentConfig")


# defaults传进去一个默认值, redirect_to跳转到另一个路由
@app.route("/old", methods=["POST", "GET"], endpoint="a",
           defaults={"a": 1}, redirect_to="/new", subdomain="")
def old():
    return "老功能"


@app.route("/new", methods=["POST", "GET"])
def new():
    return "新功能"


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

6

# coding=utf-8
from flask import Flask

app = Flask(__name__)

# 定义服务器域名
app.config["SERVER_NAME"] = "oldboy.com:5000"


# subdomain匹配子域名, 比如http://www.oldboy.com:5000/old,  username="www"
@app.route("/old", methods=["POST", "GET"], subdomain="<username>")
def old(username):
    print(username)
    return "老功能"


@app.route("/new", methods=["POST", "GET"])
def new():
    return "新功能"


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

装饰器作业

# coding=utf-8
from flask import Flask
from functools import wraps
app = Flask(__name__)
app.config.from_object("settings.DevelopmentConfig")


def wapper(func):
    @wapper(func)
    def inner(*arg,**kwargs):
        print("before")
        return func(*arg, **kwargs)
    return inner


@app.route("/index", methods=["POST", "GET"])
@wapper  # 装饰器需要写到route装饰器的下面
def index():
    pass


def order():
    return "order"


app.add_url_rule("/order", view_func=order)


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