Flask之路由相关

1.装饰器中的参数

@app.route("/info", methods=["GET", "POST"])
def student_info():
    stu_id = int(request.args["id"])
    return f"Hello Old boy {stu_id}"  # Python3.6的新特性 f"{变量名}"

2.endpoint反向的url地址，默认为视图的函数名（url_for ）

from flask import url_for
@app.route("/info", methods=["GET", "POST"], endpoint="r_info")
def student_info():
    print(url_for("r_info"))  # /info
    stu_id = int(request.args["id"])
    return f"Hello Old boy {stu_id}"  # Python3.6的新特性 f"{变量名}"

3.defaults 视图函数中的默认参数值

from flask import url_for,Flask
app = Flask(__name__)
@app.route("/info", methods=["GET", "POST"], endpoint="r_info", defaults={"nid": })
def student_info(nid):
    print(url_for("r_info"))  # /info
    # stu_id = int(request.args["id"])
    print(nid)  #
    return f"Hello Old boy {nid}"  # Python3.6的新特性 f"{变量名}"
app.run(debug=True)

4.strict_slashes=True 是否严格遵循路由地址  （url地址结尾符"/"的控制 False : 无论结尾 "/" 是否存在均可以访问 , True : 结尾必须不能是 "/"）

# 访问地址 : /info
@app.route("/info", strict_slashes=True)
def student_info():
    return "Hello Old boy info"

# 访问地址 : /infos  or  /infos/
@app.route("/infos", strict_slashes=False)
def student_infos():
    return "Hello Old boy infos"

5. redirect_to : url地址重定向

from flask import Flask
app = Flask(__name__)
# 访问地址 : /info 浏览器跳转至 /infos
@app.route("/info", strict_slashes=True, redirect_to="/infos")
def student_info():
    return "Hello Old boy info"

@app.route("/infos", strict_slashes=False)
def student_infos():
    return "Hello Old boy infos"
app.run(debug=True)

6.subdomain 子域名前缀

app.config["SERVER_NAME"] = "pythonav.com"

@app.route("/info",subdomain="DragonFire")
def student_info():
    return "Hello Old boy info"

# 访问地址为:  DragonFire.pythonav.com/info

7.动态路由参数

from flask import Flask
app = Flask(__name__)
from flask import url_for

# 访问地址 : http://127.0.0.1:5000/info/1
@app.route("/info/<int:nid>", methods=["GET", "POST"], endpoint="r_info")
def student_info(nid):
    print(url_for("r_info",nid=))  # /info/
    return f"Hello Old boy {nid}"  # Python3.6的新特性 f"{变量名}"# 访问地址为:  DragonFire.pythonav.com/info
app.run(debug=True)

注意：

<int:nid> 就是在url后定义一个参数接收

但是这种动态参数路由,在url_for的时候,一定要将动态参数名+参数值添加进去,否则会抛出参数错误的异常