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Flask-请求上下文

發布時間：2025/3/21 编程问答 12 豆豆

生活随笔收集整理的這篇文章主要介紹了 Flask-请求上下文小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

方式一

request-context.py

from flask import Flask from flask import request from flask import render_template app = Flask(__name__)@app.route('/login',methods =['POST','GET']) # def login():# username = None# password = None # if request.method == 'POST': # username = request.form['username'] # password = request.form['password'] # else:#也可以用request.args.get('username') # username = request.args['username'] # return render_template('login.html')def login():error = None username = Noneif request.method == 'POST':if valid_login(request.form['username'],request.form['password']):return log_the_user_in(request.form['username'])else:#也可以用request.args.get('username')username = request.args['username']# error = 'Invalid username/password'# 當請求形式為“GET”或者認證失敗則執行以下代碼return render_template('login.html', error=error)if __name__ == '__main__':app.run(debug = True)

login.html

<!DOCTYPE html> <html lang="en"> <head><meta charset="UTF-8"><title>Login</title> </head><body><h1>HTTP 方法:{{method}}</h1><form method="get"><div><input type="text"name = "username"placeholder="User name"/></div><div><input type="password"name ="password"placeholder="Password"/></div><input type="submit"></form> </body> </html>

方式二

WTForm方式
request-context1.py

from flask import Flask,request,render_template,redirect from wtforms import Form,TextField,PasswordField,validatorsapp = Flask(__name__)class LoginForm(Form):username = TextField("username",[validators.Required()])password = PasswordField("password",[validators.Required()])@app.route("/user",methods=['GET','POST']) def login():myForm = LoginForm(request.form)if request.method =='POST':if myForm.username.data =="user" and myForm.password.data=="password" and myForm.validate():return redirect("http://www.baidu.com")else:message = "Failed Login"return render_template('login1.html',message=message,form=myForm)return render_template('login1.html',form=myForm)if __name__ == '__main__':app.run(debug=True)

login1.html

<!DOCTYPE html> <html lang="en"> <head><meta charset="UTF-8"><title>Document</title> </head> <body> <div align="center"> <h2>User Management</h2>{% if message %} {{message}} {% endif %}<form method="POST">username:{{form.username}}<br>password:{{form.password}}<br><input type="submit" value="Submit"><input type="reset" value="reset"></form> </div></body> </html>

運行代碼,瀏覽器輸入http://127.0.0.1:5000/user
輸入用戶名user,密碼password后,將進行跳轉到baidu首頁

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