我当时正在创建一个类似程序的小型聊天室，用户可以在其中注册，登录，发送和接收消息（在Pycharm中）。该程序在mysql数据库中包含用户详细信息，并在txt文件中聊天我想在线托管它，以便可以由不同的用户在不同的计算机上访问它，所以我必须对我的代码进行哪些更改（当前设计为在单台计算机上工作）
import pymysql
import random
def register(firstName,lastName,password,userName,emailId):
db = pymysql.connect("localhost","root","pass","USERS")
cursor = db.cursor()
r=1
while(r!=0):
id = chr(random.randrange(65, 91)) + str(random.randrange(0, 10)) +str(random.randrange(0, 10))
r = cursor.execute("SELECT * FROM UserData WHERE ID = '{}';".format(id))
sql = "INSERT INTO UserData VALUES('{}','{}','{}','{}','{}','{}');".format(id,firstName,lastName,password,userName,emailId)
try:
cursor.execute(sql)
print("Registration successful")
file = open(id+'N.txt', 'a')
db.commit()
except Exception as e:
print("Registration unsuccessful")
print(str(e))
db.rollback()
db.close();
def displayNew(userId):
file = open(userId+'N.txt', 'r')
for message in file:
print(message)
open(userId+'N.txt', 'w').close()
def sendMessage(sender):
receiver = input("RECEIVER's USERNAME : ")
r = cursor.execute("SELECT * FROM UserData WHERE UserName = '{}';".format(receiver))
if (r == 1):
userInfo = cursor.fetchone()
if(sender>userInfo[0]):
chatfile = open(sender+'&'+userInfo[0]+'.txt', 'a')
elif(sender<userInfo[0]):
chatfile = open(userInfo[0]+'&'+sender+'.txt', 'a')
newfile=open(userInfo[0]+'N.txt', 'a')
message = input("MESSAGE(Single Line): ")
cursor.execute("SELECT * FROM UserData WHERE ID = '{}';".format(sender))
senderInfo = cursor.fetchone()
senderName = senderInfo[4]
chatfile.write(senderName+": "+message+"\n")
newfile.write(senderName+": "+message+"\n")
else:
print("USER DOES NOT EXIST")
retry=input("WANT TO RETRY(y/n)")
if(retry=="y"):
sendMessage(sender)
def oldMessage(receiver):
sender = input("SENDER's USERNAME : ")
r = cursor.execute("SELECT * FROM UserData WHERE UserName = '{}';".format(sender))
if (r == 1):
userInfo = cursor.fetchone()
if(receiver>userInfo[0]):
chatfile = open(receiver+'&'+userInfo[0]+'.txt', 'r')
elif(receiver<userInfo[0]):
chatfile = open(userInfo[0]+'&'+receiver+'.txt', 'r')
for message in chatfile:
print(message)
else:
print("USER DOES NOT EXIST")
retry=input("WANT TO RETRY(y/n)")
if(retry=="y"):
sendMessage(sender)
while(True):
db = pymysql.connect("localhost", "root", "dineshrashmi", "USERS")
cursor = db.cursor()
print("CHOICE 1: Login")
print("CHOICE 2: Register")
print("CHOICE 3: Exit")
ch = int(input("Enter Your Choice : "))
if(ch==1):
userName = input("User Name : ")
r=cursor.execute("SELECT * FROM UserData WHERE UserName = '{}';".format(userName))
if(r==1):
userInfo = cursor.fetchone()
password = input("Password : ")
if(userInfo[3]==password):
cursor.execute("SELECT * FROM UserData WHERE UserName = '{}';".format(userName))
print("WELCOME "+userInfo[1].upper()+" "+userInfo[2].upper())
displayNew(userInfo[0])
send=input("Do You Want To Send A Message(y/n) : ")
if(send=="y"):
sendMessage(userInfo[0])
view = input("Do You Want To View Old Message(y/n) : ")
if (view == "y"):
oldMessage(userInfo[0])
break
else:
print("INVALID PASSWORD")
else:
print("USER DOES NOT EXIST")
print("\n")
elif(ch==2):
confirmPass = False
userNameDuplicate = 1
emailDuplicate = 1
firstName = input("First Name : ")
lastName = input("Last Name : ")
while(userNameDuplicate!=0):
userName = input("User Name : ")
userNameDuplicate = int(cursor.execute("SELECT * FROM UserData WHERE UserName = '{}';".format(userName)))
if (userNameDuplicate != 0):
print("USER NAME ALREADY TAKEN")
print("Try Again!")
while(not confirmPass):
password = input("Password : ")
cpassword = input("Confirm Password : ")
if(password==cpassword):
confirmPass = True
else:
print("Password Mismatch")
print("Try Again!")
while (emailDuplicate != 0):
emailId = input("Email : ")
emailDuplicate = int(cursor.execute("SELECT * FROM UserData WHERE Email = '{}';".format(emailId)))
if (emailDuplicate != 0):
print("EMAIL ALREADY USED")
print("Try Again!")
regis = input("Register(y/n): ")
if(regis=="y"):
register(firstName,lastName,password,userName,emailId)
print("\n")
elif(ch==3):
break
else:
print("INVALID CHOICE")
print("\n")
db.close();
假设您托管的MySql数据库的IP为xxx.xxx.xx.xx，并且它具有一个用户（例如，密码为root的PASS）和一个数据库（例如USERS）。
使用PyMySQL，可以通过用代码中的IP替换'localhost'来连接到它。
示例：
...
db = pymysql.connect("xxx.xxx.xx.xx","root","pass","UERS")
cursor = db.cursor()
...
请确保已设置数据库实例，使其可以在任何地方（*或最好是从您想连接的地方）]
您可以使用以下命令使用MySQL client验证连接：
mysql -h xxx.xxx.xx.xx -u root -pPASS
# To see the list of databases after getting connected
>show databases;
从哪里开始？您可能会采取几种方法，但到目前为止，最常见的方法是使用基于HTML，CSS和JavaScript的演示前端，并使用Python编写服务器端后端。 >
Web Server Gateway Interface（WSGI）Python应用程序。如果没有，则必须编程为Common Gateway Interface（CGI）规范。form，该页面将接受用户ID和密码并登录用户并在session中维护登录信息。成功登录后，用户将重定向locking机制来序列化对文件的访问。我还没有解释HTML，CSS，JavaScript，WSGI，CGI等是什么，这将花费很长时间。这是供您调查。