# -*- coding: utf-8 -*- from flask import Flask,render_template,request,redirect,session,url_for import time app = Flask(__name__,template_folder="templates") app.secret_key = "A" #类似于加密盐 app.config["SERVER_NAME"] = "jianping.com" import functools def auth(func): @functools.wraps(func) #解决函数名重复的冲突问题 def inner(*args,**kwargs): if not session.get("user_info"): return redirect("/login") return func(*args,**kwargs) print(inner.__name__) return inner @app.route("/index",) @auth # index = auth(index)=inner def index(): return render_template("index.html") @app.route("/text") @auth def text(): return render_template("index.html") @app.route("/login",methods=["POST","GET"]) def hello_world(): if request.method == "GET": return render_template("login.html") else: username = request.form.get("username") password = request.form.get("password") if username == "张建平" and password == "1234567": session["user_info"] = "QQ" return redirect("/index") return render_template("login.html",msg="用户名密码错误") @app.route("/one",subdomain="zhang") def one(): return "草拟大爷" @app.route("/two",subdomain="cheng") def two(): return "草拟妹" if __name__ == '__main__': app.run()
# -*- coding: utf-8 -*- from flask import Flask,url_for,views app = Flask(__name__) def auth(func): def inner(*args,**kwargs): result = func(*args,**kwargs) print("============会执行") return result return inner #函数方法 # @app.route("/index/<int:nid>",endpoint="xx") def index(nid): # url_for("xx",nid=123) print(nid) return "Index" app.add_url_rule("/index/<int:nid>",view_func=index,defaults={"nid":444},strict_slashes=False) #加上默认值不管前端传什么值都默认用后端的，虽然用后端的 #类方法 # class IndexView(views.MethodView): # decorators = [auth,] # def get(self): # v = url_for("index") # print(v) # return "GET————————" # def post(self): # return "GET==============" # # app.add_url_rule("/index",view_func=IndexView.as_view(name="index")) if __name__ == '__main__': app.run()
# -*- coding: utf-8 -*- from flask import Flask,url_for,request,redirect,render_template,jsonify,make_response from urllib.parse import urlencode,quote,unquote app = Flask(__name__) @app.route("/index",endpoint="xx") def index(): get_data = request.args #get_data:ImmutableMultiDict get_dict = get_data.to_dict() #将上边的结果转换为字典 get_dict["xx"] = "18" #给字典设置值 url = urlencode(get_dict) #浏览器url？后边的地址 print(request.query_string) #上边的url，不过是byte类型的 val = "%E8%8D%89%E6%8B%9F%E5%A4%A7%E7%88%B7" #url中的中文显示 print(unquote(val)) #将上边的火星文转换为中文 res = "好好学习天天向上" print(quote(res)) #将中文转换为火星文 ret = {"name":"alex"} print(type(jsonify(ret))) #<class 'flask.wrappers.Response'> # return jsonify(ret) #返回的结果是json字符串 response = make_response("<h1>xxxxx</h1>") #经过make_response处理之后可以有一些功能 # response.headers["xxx"] = "ooo" # print(response) return response if __name__ == '__main__': app.run()
# -*- coding: utf-8 -*- from flask import Flask,url_for,request,redirect,render_template,jsonify,make_response,Markup from urllib.parse import urlencode,quote,unquote app = Flask(__name__) def text(a1,a2): return a1+a2 @app.template_global() #设置了全局变量及时不用传也可以共享 def sb(a1,a2): return a1+a2+100 @app.template_filter() def db(a1,a2,a3): return a1+a2+a3 @app.route("/index",endpoint="xx") def index(): v1 = "字符串" v2 = [11,22,33] v3 = {"k1":"v1","k2":"v2"} v4 = Markup("<input type='text' />") v5 = "<input type='text' />" #浏览器显示字符串 return render_template("index.html",v1=v1,v2=v2,v3=v3,v4=v4,v5=v5,text=text) if __name__ == '__main__': app.run()
# -*- coding: utf-8 -*- from flask import Flask,session,Session from urllib.parse import urlencode,quote,unquote from werkzeug.local import LocalProxy app = Flask(__name__) app.secret_key = "HQ" app.config["SESSION_COOKIE_NAME"] = "session_key" """ 'SESSION_COOKIE_NAME': 'session', 'SESSION_COOKIE_DOMAIN': None, 'SESSION_COOKIE_PATH': None, 'SESSION_COOKIE_HTTPONLY': True, 'SESSION_COOKIE_SECURE': False, 'SESSION_REFRESH_EACH_REQUEST': True, 'PERMANENT_SESSION_LIFETIME': timedelta(days=31) """ @app.route("/index",endpoint="xx") def index(): session['xxx'] = 123 session['xxx1'] = 123 return "xxx" if __name__ == '__main__': app.run()
# -*- coding: utf-8 -*- from flask import Flask,session,Session,flash,get_flashed_messages,redirect,render_template,request app = Flask(__name__) app.secret_key = "HQ" #一个视图函数设置，另一个视图函数取值 @app.route("/users") def index(): # msg = request.args.get("msg","") msg = session.get("msg") print(msg) if msg: del session["msg"] v = get_flashed_messages() print(v) msg = "" return render_template("flash.html",msg=msg) @app.route("/useradd") def index_add(): session["msg"] = "添加成功=======" flash("添加成功") return redirect("/users") if __name__ == '__main__': app.run()
# -*- coding: utf-8 -*- from flask import Flask app = Flask(__name__) app.secret_key = "HQ" #类似于中间件的操作 @app.before_request def process_request1(): print("process_request1===================1") @app.after_request def process_response1(response): print("process_response1==================1") return response @app.before_request def process_request2(): print("process_request2====================2") @app.after_request def process_response2(response): print("process_response2===================2") return response @app.route("/index") def index(): print("index") return "INDEX" @app.route("/order") def order(): print("order") return "ORDER" @app.route("/text") def text(): print("text") return "TExT" if __name__ == '__main__': app.run()
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h1>{{msg}}</h1> <h1>welcome to my index</h1> <hr> v1:{{v1}} v2:{{v2}} v3:{{v3}} v4:{{v4}} v5:{{v5}} text{{text(1,2)}} <br> <hr> <!--可循环--> {% for item in v2 %} v2:{{item}} {% endfor %} <hr> <!--字典可循环--> {% for k,v in v3.items() %} {{k}},{{v}} {% endfor %} <br> {{v3.k1}} {{v3.get("k1")}} <hr> {{sb(1,2)}} <br> {{1|db(2,3)}} <hr> <!--类似于for循环--> {% macro xxxx(name,type='text',value='') %} <input type="{{ type }}" name="{{ name }}" value="{{ value }}" > <input type="{{ type }}" name="{{ name }}" value="{{ value }}" > <input type="{{ type }}" name="{{ name }}" value="{{ value }}" > {% endmacro %} {{ xxxx("zhang")}} <hr> <img src="/static/school.png" alt=""> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h1>欢迎访问</h1> <form method="post"> <input type="text" name="username"> <input type="text" name="password"> <input type="submit"> {{msg}} </form> </body> </html>
测试页面
# -*- coding: utf-8 -*- from flask import Flask,url_for app = Flask(__name__) from werkzeug.routing import BaseConverter 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 app.url_map.converters["xxx"] = RegexConverter @app.route("/index/<xxx('d+'):nid>",endpoint="xx") def index(nid): url_for("xx",nid=123) return "Index" if __name__ == '__main__': app.run()
前端参数传递： {#前端url传参 {{ url_for('index',qq=7) }}#} 闪现是基于session实现的，先设置，然后删除，闪现，顾名思义，只是出现一次就消失了，flash设置值； get_flashed_messages获取值（只能获取一次，第二次获取不到任何东西）