326 lines
11 KiB
Python
326 lines
11 KiB
Python
import threading
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import json
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from flask import Flask, jsonify, request
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import sqlite3
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import socket
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import secrets
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import time
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import os
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app = Flask(__name__)
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socket_server = socket.socket()
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socket_server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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# 修改数据结构：使用用户名作为主键
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active_connections = {} # {username: {'conn': conn, 'ip': ip}}
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chat_connections = [] # 所有活跃连接列表
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tokens = {} # 令牌管理
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def get_db_connection():
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conn = sqlite3.connect("usr.db")
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conn.row_factory = sqlite3.Row
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return conn
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def isuserxist(name):
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cn = get_db_connection()
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csr = cn.cursor()
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csr.execute('SELECT * FROM users WHERE name = ?', (name,))
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rst = csr.fetchone()
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cn.close()
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return rst is not None
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def ispsswdright(name, passwd):
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cn = get_db_connection()
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csr = cn.cursor()
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csr.execute("SELECT passwd FROM users WHERE name = ?", (name,))
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result = csr.fetchone()
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cn.close()
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return result and result[0] == passwd
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def get_avatar(username):
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cn = get_db_connection()
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csr = cn.cursor()
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csr.execute("SELECT avatar FROM users WHERE name = ?", (username,))
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result = csr.fetchone()
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cn.close()
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return result[0] if result else "default_avatar.png"
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def register_user(usr, pwd, avatar="default_avatar.png"):
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conn = get_db_connection()
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try:
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cursor = conn.cursor()
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# 添加avatar字段
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cursor.execute("INSERT INTO users (name, passwd, avatar) VALUES (?, ?, ?)",
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(usr, pwd, avatar))
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conn.commit()
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return {"type": "register_1", "success": True, "message": "User registered successfully"}
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except sqlite3.IntegrityError:
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return {"type": "register_0", "success": False, "message": "Username already exists"}
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except sqlite3.Error as e:
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return {"type": "register_0", "success": False, "message": str(e)}
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finally:
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conn.close()
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def generate_token(username):
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token = secrets.token_hex(16)
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tokens[token] = {'username': username, 'timestamp': time.time()}
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return token
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def validate_token(token):
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if token in tokens:
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if time.time() - tokens[token]['timestamp'] < 3600:
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tokens[token]['timestamp'] = time.time()
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return tokens[token]['username']
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return None
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@app.route("/api/register", methods=['POST'])
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def register1():
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vl = request.get_json()
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usr = vl.get('username')
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pwd = vl.get('password')
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avatar = vl.get('avatar', 'default_avatar.png') # 获取头像
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# 头像验证
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if avatar and not (avatar.endswith('.png') or avatar.endswith('.jpg')):
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return jsonify({
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"type": "register_0",
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"success": False,
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"message": "Invalid avatar format. Only .png or .jpg allowed"
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}), 400
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result = register_user(usr, pwd, avatar)
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if result['success']:
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return jsonify(result)
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else:
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return jsonify(result), 403 if result['message'] == "Username already exists" else 500
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@app.route("/api/login", methods=['POST'])
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def login():
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data = request.get_json()
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username = data['username']
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# 检查账号是否已登录
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if username in active_connections:
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return jsonify({
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"type": "login_0",
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"status": "error",
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"message": "Account already logged in"
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}), 409 # 冲突状态码
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if isuserxist(username) and ispsswdright(username, data['password']):
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token = generate_token(username)
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avatar = get_avatar(username)
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return jsonify({
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"type": "login_1",
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"status": "success",
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"token": token,
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"avatar": avatar # 返回头像
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})
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return jsonify({
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"type": "login_0",
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"status": "error",
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"message": "Invalid credentials"
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}), 401
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@app.route("/api/avatar/<username>", methods=['GET'])
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def get_user_avatar(username):
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avatar = get_avatar(username)
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return jsonify({"username": username, "avatar": avatar})
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@app.route("/api/chat", methods=['POST'])
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def chat():
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token = request.headers.get('Authorization')
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username = validate_token(token)
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if not username:
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return jsonify({"type": "chat", "status": "error"}), 401
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data = request.get_json()
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message = {
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"type": "chat",
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"user": username,
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"message": data['message'],
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"avatar": get_avatar(username) # 添加头像信息
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}
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broadcast_message(message)
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return jsonify({"type": "chat", "status": "success"})
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def broadcast_message(message, sender=None):
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for conn in chat_connections:
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try:
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conn.sendall(json.dumps(message).encode('utf-8'))
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except:
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# 连接异常时移除
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for uname, info in list(active_connections.items()):
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if info['conn'] == conn:
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del active_connections[uname]
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break
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if conn in chat_connections:
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chat_connections.remove(conn)
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def handle_socket_message(data, addr, conn):
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try:
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action = data.get('type')
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if action == 'register':
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avatar = data.get('avatar', 'default_avatar.png')
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result = register_user(data.get('username'), data.get('password'), avatar)
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conn.sendall(json.dumps(result).encode('utf-8'))
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return result
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elif action == 'login':
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username = data['username']
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password = data['password']
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# 检查账号是否已登录
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if username in active_connections:
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response = {
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"type": "login_0",
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"status": "error",
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"message": "Account already logged in"
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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return response
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if isuserxist(username) and ispsswdright(username, password):
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# 移除旧连接（如果存在）
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if username in active_connections:
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old_conn = active_connections[username]['conn']
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if old_conn in chat_connections:
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chat_connections.remove(old_conn)
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del active_connections[username]
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# 添加新连接
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active_connections[username] = {'conn': conn, 'ip': addr[0]}
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if conn not in chat_connections:
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chat_connections.append(conn)
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token = generate_token(username)
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avatar = get_avatar(username)
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response = {
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"type": "login_1",
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"status": "success",
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"message": "Login successful",
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"token": token,
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"username": username,
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"avatar": avatar # 返回头像
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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return response
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else:
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response = {
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"type": "login_0",
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"status": "error",
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"message": "Invalid credentials"
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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return response
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elif action == 'chat':
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token = data.get('token')
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if not token:
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response = {
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"type": "chat",
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"status": "error",
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"message": "Missing token"
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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return response
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username = validate_token(token)
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if not username:
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response = {
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"type": "chat",
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"status": "error",
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"message": "Invalid token"
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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return response
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if username not in active_connections:
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response = {
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"type": "chat",
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"status": "error",
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"message": "Not logged in"
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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return response
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message = {
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"type": "chat",
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"user": username,
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"message": data['message'],
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"avatar": get_avatar(username) # 添加头像
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}
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broadcast_message(message)
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# 返回成功响应
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response = {"type": "chat", "status": "success"}
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conn.sendall(json.dumps(response).encode('utf-8'))
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return response
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except Exception as e:
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response = {
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"status": "error",
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"message": str(e)
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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return response
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def run_socket_server():
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socket_server.bind(("localhost", 8889))
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socket_server.listen()
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print("Socket server running on port 8889")
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while True:
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conn, addr = socket_server.accept()
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print(f"Socket client connected: {addr}")
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try:
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while True:
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data = conn.recv(1024)
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if not data:
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break
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try:
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# 尝试解码为UTF-8，忽略错误字符
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decoded_data = data.decode('utf-8', errors='ignore')
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json_data = json.loads(decoded_data)
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response = handle_socket_message(json_data, addr, conn)
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except json.JSONDecodeError:
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response = {
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"type": "error",
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"status": "error",
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"message": "Invalid JSON"
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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except Exception as e:
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response = {
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"type": "error",
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"status": "error",
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"message": str(e)
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}
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conn.sendall(json.dumps(response).encode('utf-8'))
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except (ConnectionResetError, BrokenPipeError):
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print(f"Client {addr} disconnected abruptly")
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finally:
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# 清理断开的连接
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for username, info in list(active_connections.items()):
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if info['conn'] == conn:
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del active_connections[username]
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print(f"User {username} disconnected")
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break
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if conn in chat_connections:
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chat_connections.remove(conn)
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try:
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conn.close()
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except:
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pass
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print(f"Connection closed for {addr}")
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if __name__ == '__main__':
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with get_db_connection() as conn:
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# 添加avatar字段
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conn.execute('''CREATE TABLE IF NOT EXISTS users
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(name TEXT PRIMARY KEY,
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passwd TEXT,
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avatar TEXT DEFAULT 'default_avatar.png')''')
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threading.Thread(target=run_socket_server, daemon=True).start()
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app.run(port=5001) |