一、常用路由系统
- @app.route('/user/<username>')
- @app.route('/post/<int:post_id>')
- @app.route('/post/<float:post_id>')
- @app.route('/post/<path:path>')
- @app.route('/login', methods=['GET', 'POST'])
二、路由参数
1. methods
methods：当前url地址，允许访问的请求方式，默认不写为GET方法
@app.route("/info", methods=["GET", "POST"])
def student_info():
stu_id = int(request.args["id"])
# Python3.6的新特性 f"{变量名}"
return f"Hello Old boy {stu_id}"
2. endpoint
endpoint：反向url地址，默认为仕途函数名（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}"
3. defaults
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): #这里形参必须有个nid接收
print(url_for("r_info")) # /info
# stu_id = int(request.args["id"])
print(nid) # 100
return f"Hello Old boy {nid}"
4. strict_slashes
strict_slashes：url地址结尾符"/"的控制；False：无论结尾"/"是否存在均可访问；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
redirect_to：url地址重定向，且为308永久重定向
# 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 Old boy info"
@app.route("/infos", strict_slashes=False)
def student_infos():
return "Hello Old boy infos"
6. subdomain
subdomain : 子域名前缀 subdomian=”cnblogs” 这样写可以得到 cnblogs.aspx.com 前提是app.config[“SERVER_NAME”] = “aspx.com”
app.config["SERVER_NAME"] = "aspx.com"
@app.route("/info",subdomain="cnblogs")
def student_info():
return "Hello cnblogs info"
# 访问地址为: cnblogs.aspx.com/info
7. 动态参数路由
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
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"Hello Old boy {nid}"
1. 多个参数传递
from flask import url_for
# 访问地址 : http://127.0.0.1:5000/info/1
@app.route("/info/<nid1>/<nid2>", methods=["GET", "POST"], endpoint="r_info")
def student_info(nid):
print(url_for("r_info",nid=2,nid=3)) # /info/2/3
return f"Hello Old boy {nid}"