Error in user YAML: (<unknown>): could not find expected ':' while scanning a simple key at line 3 column 1
---
- oeasy Python 0593
- 这是 oeasy 系统化 Python 教程，从基础一步步讲，扎实、完整、不跳步。愿意花时间学，就能真正学会。
本教程同步发布在：
个人网站： `https://oeasy.org`
蓝桥云课： `https://www.lanqiao.cn/courses/3584`
GitHub： `https://github.com/overmind1980/oeasy-python-tutorial`
Gitee： `https://gitee.com/overmind1980/oeasypython`
---- 上次 实现了
- 动态分配路由的 效果
- 可以把关于用户管理的路由
- 全都放到一个
modules/user/__init__.py - 进行处理呢？
- 这样就可以实现模块封装了
- 真的可以把用户相关的模块封装起来吗？
- 如果当前session中的用户名是admin的话
- 将路由重定向到/user_manager
- 我想将/user_manager
- 放在独立的user_manager.py中
- 可能吗？
from flask import Blueprint
app_user = Blueprint("user", __name__)
@app_user.route('/user/')
def user():
return 'oeasy redirects here o'
- 尝试在main.py中使用蓝图
from flask import Flask,render_template,request,redirect,session
import traceback
import psycopg
import datetime
from db import pool
from config import app
from user_manager import app_user
app.register_blueprint(app_user)
@app.route('/')
def hello():
current_user = session.get("current_user")
print("current user:",current_user)
with pool.connection() as conn:
with conn.cursor() as cur:
cur.execute("SELECT * FROM login;")
records = cur.fetchall()
cur.close()
conn.close()
return render_template("show_data.html", l = records,current_user = current_user)
@app.route("/regist", methods=['POST', 'GET'])
def regist():
username = request.form["username"]
password = request.form["password"]
print(username)
with pool.connection() as conn:
with conn.cursor() as cur:
try:
sql = "INSERT INTO login(username, password) VALUES(%s, %s)"""
t = (username,password)
cur.execute(sql,t)
conn.commit()
cur.close()
conn.close()
except Exception:
print(traceback.print_exc())
cur.close()
conn.close()
return username + " already exists"
else:
return redirect("/")
@app.route("/login", methods=['POST', 'GET'])
def login():
username = request.form["username"]
password = request.form["password"]
print(username)
with pool.connection() as conn:
with conn.cursor() as cur:
try:
sql = "SELECT * FROM login WHERE username=%s AND password=%s"
t = (username,password)
user = cur.execute(sql,t).fetchone()
print("sql===",sql,";",t)
print(type(user))
session["current_user"] = str(user[0])
cur.close()
conn.close()
except Exception:
print(traceback.print_exc())
cur.close()
conn.close()
return "failed to login as" + user[0]
else:
return redirect("/")
if __name__ == "__main__":
app.run(debug=True)
- 想让用户管理界面
- 首先确认用户名是admin
- 首先注册一个admin
- 使用admin登录
- session被更新
- 其他人无权访问
- 只有admin可以进行用户管理
- 需要显示出所有用户
from flask import Flask,render_template,request,redirect,session,Blueprint
from db import pool
app_user = Blueprint("user", __name__)
@app_user.route('/user/')
def user():
current_user = session["current_user"]
print(current_user)
if current_user == "admin":
with pool.connection() as conn:
with conn.cursor() as cur:
cur.execute("SELECT * FROM login;")
records = cur.fetchall()
cur.close()
conn.close()
return render_template("user_manager.html", l = records,current_user = current_user)
else:
return "You are not admin<br/>"
- 需要制作渲染页
<!doctype html>
<title>Hello from Flask</title>
{% if current_user == "admin" %}
<h1>Hello {{ current_user }}!</h1>
{% for name in l %}
<p>Hello {{ name }}!</p>
{% endfor %}
{% else %}
<h1>You dont have permission</h1>
{% endif %}
- 最终结果
- 这次制作了用户管理模块
- 如果当前用户是admin的话
- 就展示所有用户的信息
- 其实没有必要展示密码
- 而且没有必要展示admin的信息
- 这些可以调整吗？🤔
- 下次再说!from flask import Blueprint
- 本文来自 oeasy Python 系统教程。
- 想完整、扎实学 Python，
- 搜索 oeasy 即可。