Python Flask自定义URL路由参数过滤器的方法详解

from flask import Flask

app = Flask(__name__)


@app.get("/<value>")
def index(value):
    return str(2 == value)


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

from flask import Flask

app = Flask(__name__)


@app.get("/<value>")
def index(value):
    # return str(2 == value)
    return str(2 == int(value))


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

GET http://127.0.0.1:5000/2

True

from flask import Flask

app = Flask(__name__)


@app.get("/<int:value>")
def index(value):
    # return str(2 == int(value))
    return str(2 == value)


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

GET http://127.0.0.1:5000/2

True

from flask import Flask, url_for
from werkzeug.routing import BaseConverter

app = Flask(__name__)


# 定义转换器
class ListConverter(BaseConverter):
    def to_python(self, value):
        """解析url参数"""
        return value.split(',')

    def to_url(self, value):
        """转为url参数"""
        return ','.join(value)


# 注册
app.url_map.converters['list'] = ListConverter


@app.get("/<list:value>")
def index(value):
    print(url_for('index', value=['a', 'b', 'c']))
    # 输出：/a,b,c
    return str(value)


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

GET http://127.0.0.1:5000/1,2,3

['1', '2', '3']