标签：__ return name flask app 基础 session def
flask基础
文章目录
简单使用
日常Hello World
from flask import Flask
app = Flask(__name__)
@app.route("/")
def index():
return "Hello World"
if __name__=="__main__":
app.run()
from flask import Flask, request, render_template, redirect
app = Flask(__name__)
@app.route("/")
def index():
# print(request.path)
# return render_template("./index.html")
return redirect("http://www.baidu.com")
if __name__=="__main__":
app.run()
POST/GET及Session
from flask import Flask, request, render_template, redirect, session, url_for
app = Flask(__name__)
app.debug = True
app.secret_key = "djhwkjdhakjhdwkj"
USERS = {
1: {"name": "张三", "age": 18, "gender": "男", "text": "道路千万条"},
2: {"name": "李四", "age": 28, "gender": "男", "text": "安全第一条"},
3: {"name": "王五", "age": 18, "gender": "女", "text": "行车不规范"}
}
# endpoint用于反向解析 默认为函数名字
@app.route("/login", methods=["GET", "POST"], endpoint="log")
def login():
if request.method == "GET":
return render_template("login.html")
else:
# post提交过来的数据放到form中
# get提交过来的数据query_string中
user = request.form.get("user")
pwd = request.form.get("pwd")
if user == "sweet" and pwd == "123":
# 往session中放入key和value
session["user_info"] = user
return redirect("/index")
else:
return render_template("login.html", error="用户名或密码错误")
@app.route("/index", methods=["GET"])
def index():
user = session.get("user_info")
if not user:
url = url_for("log")
return redirect(url)
return render_template("index.html", user_dict=USERS)
@app.route("/detail/<int:id>", methods=["GET"])
def detail(id):
user = session.get("user_info")
if not user:
return redirect("/login")
return render_template("detail.html", info=USERS.get(id))
if __name__=="__main__":
app.run()
config配置
from flask import Flask
app = Flask(__name__)
class Config(object):
DEBUG = False
# 指定配置文件类
app.config.from_object(Config)
# app.config.from_object("settings.Config")
# app.config.from_pyfile("settings.py") # 指定配置文件
@app.route("/")
def index():
return "Hello World"
if __name__ == "__main__":
app.run()
jsonify
from flask import Flask,render_template,session,make_response,jsonify
app = Flask(__name__)
@app.route("/")
def index():
re = make_response(jsonify({"123":22}))
re.set_cookie("aa", "bb")
return re
if __name__=="__main__":
app.run()
操作session
from flask import Flask, session
app = Flask(__name__)
app.secret_key = "kjadkjwkld"
app.config["SESSION_COOKIE_NAME"] = "xxx"
@app.route("/")
def index():
session["xx"] = "123"
return "index"
@app.route("/get_session")
def get():
return session["xx"]
@app.route("/del_session")
def delete_session():
session.pop("xx")
return "删除成功"
if __name__=="__main__":
app.run()
请求扩展
from flask import Flask, request, session, redirect
app = Flask(__name__)
app.secret_key = "uiahwduihawui"
# 请求前
@app.before_request
def process_request(*args, **kwargs):
print("before执行")
if request.path == "/login":
return None
user = session.get("user_info")
if user:
return None
return redirect("/login")
@app.after_request
def process_response(response):
print("最后")
return response
@app.route("/", methods=["GET", "POST"])
def index():
print("index")
a = 1 / 0 # 引发异常
return "index"
@app.route("/login")
def login():
session["user_info"] = "123"
return "OK"
# 出错后
@app.errorhandler(404)
def err_404(arg):
print(arg)
return "404错误"
@app.errorhandler(500)
def err_500(arg):
print(arg)
return "test.html"
if __name__=="__main__":
app.run()
用redis缓存session
from flask import Flask, make_response, session
from flask_session import RedisSessionInterface
import redis
app = Flask(__name__)
conn = redis.Redis(host="127.0.0.1", port=6379)
app.session_interface = RedisSessionInterface(conn, "whb")
@app.route("/", methods=["POST", "GET"])
def index():
re = make_response("index")
return re
if __name__=="__main__":
app.run()
标签：__,return,name,flask,app,基础,session,def 来源： https://blog.csdn.net/qq_46456049/article/details/112689933
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。