`import mysql.connector
import hashlib
from flask import Flask,request,render_template
app=Flask(name)
@app.route('/',methods=['get','post'])
def home():
return render_template('home.html')
def hashmd5(str):
ming=str.encode('utf-8')
m=hashlib.md5()
m.update(ming)
return m.hexdigest()
@app.route('/signin', methods=['GET'])
def signin_form():
return render_template('form.html')
@app.route('/signin', methods=['POST'])
def signin():
username = request.form['username']
password = request.form['password']
conn=mysql.connector.connect(host="39.105.116.195",port="3306",user="root",password="Ab123456",database='test')
cursor=conn.cursor()
cursor.execute("select * from user where username='"+username+"'")
row=cursor.fetchall()
cursor.close()
conn.close()
if row==[]:
return render_template('form.html',message='还没注册呢铁子')
else:
if username==row[0][0] and hashmd5(password)==row[0][1]:
return render_template('signin-ok.html',username=username)
return render_template('form.html',message='Bad username or password',username=username)
@app.route('/register',methods=['GET'])
def regesuter_form():
return render_template('register_form.html')
@app.route('/register',methods=['POST'])
def register():
username=request.form['username']
password=request.form['password']
if (check(username)):
conn=mysql.connector.connect(host="39.105.116.195",port="3306",user="root",password="Ab123456",database='test')
cursor=conn.cursor()
cursor.execute("insert into user values('"+username+"','"+hashmd5(password)+"')")
conn.commit()
cursor.close()
conn.close()
return render_template('signin-ok.html',username=username)
else:
return render_template('form.html',message='已经被注册了',username=username)
def check(user):
conn=mysql.connector.connect(host="39.105.116.195",port="3306",user="root",password="Ab123456",database='test')
cursor=conn.cursor()
cursor.execute("select * from user where username='"+user+"'")
row=cursor.fetchall()
cursor.close()
conn.close()
if row ==[]:
return True
else:
return False
if name=="main":
app.run(port='80')`