flask的路由系统
1. @app.route() 装饰器中的参数
methods : 当前 url 地址,允许访问的请求方式
@app.route("/info", methods=["GET", "POST"]) def student_info(): stu_id = int(request.args["id"]) return f"Hello{stu_id}" # Python3.6的新特性 f"{变量名}"
endpoint : 反向url地址,默认为视图函数名 (url_for)
from flask import url_for @app.route("/info", methods=["GET", "POST"], endpoint="r_info") def student_info(): # 用url_for根据视图函数名找url路径,需要导入 print(url_for("r_info")) # /info stu_id = int(request.args["id"]) return f" {stu_id}" # Python3.6的新特性 f"{变量名}"
defaults : 视图函数的参数默认值{"nid":1}
from flask import url_for @app.route("/info", methods=["GET", "POST"], endpoint="r_info", defaults={"nid": 100}) def student_info(nid): print(url_for("r_info")) # /info # stu_id = int(request.args["id"]) print(nid) # 100 return f" {nid}" # Python3.6的新特性 f"{变量名}"
strict_slashes
strict_slashes : 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 world" # 访问地址 : /infos or /infos/ @app.route("/infos", strict_slashes=False) def student_infos(): return "hello world"
redirect_to : url地址重定向
# 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 world" @app.route("/infos", strict_slashes=False) def student_infos(): return "hello world"
subdomain : 子域名前缀
subdomian="DragonFire" 这样写可以得到子域名.主域名前提是app.config["SERVER_NAME"] = "as.com"
app.config["SERVER_NAME"] = "as.com" @app.route("/info",subdomain="son") def student_info(): return "hello world" # 访问地址为: son.as.com/info
2.动态参数路由
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=2)) # /info/2 return f" {nid}" # Python3.6的新特性 f"{变量名}"
<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