NeteaseUrl/web/routers/register.py

# -*- coding: utf-8 -*-
"""注册 / 找回密码 / 卡密 / 验证码。

端点：
- POST /api/v1/auth/send_code        ↔ Flask /auth/send_code
- POST /api/v1/auth/register         ↔ Flask /auth/register
- POST /api/v1/auth/trial            ↔ Flask /auth/trial
- POST /api/v1/auth/redeem           ↔ Flask /auth/redeem
- POST /api/v1/auth/forgot_password  ↔ Flask /auth/forgot_password

说明：
- 同步的 auth_system 调用（SQLite 事务、邮件 SMTP、PBKDF2）经 asyncio.to_thread 执行，
  不阻塞事件循环；行为与历史实现完全一致。
- 发码 IP 限流复用 web.auth_state 的模块级状态 `_SEND_CODE_IP`。
- 失败锁定/验证码消费等安全口径逐字保留。
"""
import asyncio
import os
import sqlite3
import time
from typing import Annotated

from fastapi import APIRouter, Depends, Request
from fastapi.responses import JSONResponse

import auth_system as auth
import web.deps as deps
from core import db, repo
from core import session as cs
from web import ratelimit
from web.deps import SiteUser, current_user
from web.request_utils import (
    request_data as _request_data,
)
from web.response import error, success
from web.serializers import user_public as _user_public

router = APIRouter()

SESSION_COOKIE = 'session'
_SESSION_MAX_AGE = 7 * 86400




def _login_cookie_response(payload: dict, message: str, uid: int, seq: int,
                           secure: bool) -> JSONResponse:
    resp = JSONResponse(content={'status': 200, 'success': True, 'message': message, 'data': payload})
    cookie = cs.dumps(deps.secret_key(), {'site_uid': uid, 'site_uid_seq': seq,
                                     'site_uid_ts': int(time.time())})
    resp.set_cookie(SESSION_COOKIE, cookie, max_age=_SESSION_MAX_AGE, httponly=True,
                    samesite='lax', path='/', secure=secure)
    return resp


async def _safe_register_credits() -> int:
    try:
        credits = int(await repo.get_setting('register_credits', str(auth.DEFAULT_REGISTER_CREDITS)) or 0)
    except (TypeError, ValueError):
        return auth.DEFAULT_REGISTER_CREDITS
    return max(0, credits)


@router.post('/auth/send_code')
async def send_code(request: Request):
    """发送邮箱验证码（注册/找回用途隔离）。"""
    from web.auth_state import _send_code_ip_check
    ip = ratelimit.client_ip(request)
    if not _send_code_ip_check(ip):
        return error('验证码请求过于频繁，请稍后再试')
    data = await _request_data(request)
    email = str(data.get('email') or '').strip()
    purpose = str(data.get('purpose') or 'register').strip()
    if purpose not in ('register', 'reset'):
        return error('验证码用途不正确')
    try:
        await asyncio.to_thread(auth.send_verify_code, email, purpose)
        return success(message='验证码已发送，请查收邮箱')
    except (ValueError, RuntimeError) as e:
        return error(str(e))
    except Exception:
        return error('验证码发送失败，请稍后重试', 500)


@router.post('/auth/trial')
async def trial():
    """试用已并入注册：注册即送 N 次。"""
    return error(f'注册即送 {await _safe_register_credits()} 次免费下载次数，请直接注册账号')


@router.post('/auth/redeem')
async def redeem(user: Annotated[SiteUser | None, Depends(current_user)], request: Request):
    """卡密充值。"""
    if user is None:
        return error('请先登录', 401, error_code='unauthorized')
    ip = ratelimit.client_ip(request)
    data = await _request_data(request)
    code = str(data.get('code') or '')
    try:
        credits, remaining = await asyncio.to_thread(auth.redeem_card, code, user.username)
        await asyncio.to_thread(auth.add_log, 'success', user.username, ip, '卡密充值',
                                f'{code[:4]}**** · +{credits} 次')
        return success({'credits': credits, 'duration_seconds': remaining,
                        'duration_text': auth.format_credits(remaining)},
                       f'充值成功，+{credits} 次')
    except ValueError as e:
        await asyncio.to_thread(auth.add_log, 'fail', user.username, ip, '卡密充值', str(e))
        return error(str(e))
    except Exception:
        return error('充值失败，请稍后重试', 500)


@router.post('/auth/forgot_password')
async def forgot_password(request: Request):
    """自助找回密码：邮箱验证码 → 重置密码并踢下全部会话（响应防枚举）。"""
    data = await _request_data(request)
    email = auth._normalize_email(str(data.get('email') or ''))
    code = str(data.get('code') or '').strip()
    newpwd = str(data.get('password') or '')
    if len(newpwd) < 8 or len(newpwd) > 128:
        return error('新密码长度需在 8-128 位之间')
    if not email:
        return error('缺少邮箱')
    try:
        if not await asyncio.to_thread(auth.check_verify_code, email, code, 'reset'):
            return error('邮箱验证码错误或已过期')
        user = await asyncio.to_thread(auth.get_user_by_email, email)
        if not user:
            return error('邮箱验证码错误或已过期')
        if user['role'] == 'admin':
            # 管理员不走自助找回（2FA 保护，统一防枚举文案）
            return error('邮箱验证码错误或已过期')
        await asyncio.to_thread(auth.reset_password, user['id'], newpwd)
        await asyncio.to_thread(auth.add_log, 'success', user['username'],
                                ratelimit.client_ip(request), '自助找回密码', '邮箱验证码重置')
        return success(message='密码已重置，请使用新密码登录（所有设备已下线）')
    except Exception:
        return error('重置失败，请稍后重试', 500)


@router.post('/auth/register')
async def register(request: Request):
    """注册：验证码校验 → 用户名/邮箱查重 → 防刷双闸 → 建号赠送 → 建立会话。"""
    from web.auth_state import re_username_ok

    data = await _request_data(request)
    username = str(data.get('username') or '').strip()
    password = str(data.get('password') or '')
    email = auth._normalize_email(str(data.get('email') or ''))
    code = str(data.get('code') or '').strip()
    device_id = str(data.get('device_id') or '').strip()[:64]
    ip = ratelimit.client_ip(request)

    if str(data.get('agree') or '').strip() != '1':
        return error('请先阅读并同意《用户协议》与《隐私政策》')
    if not (3 <= len(username) <= 20 and re_username_ok(username)):
        return error('用户名需 3-20 位，仅支持中文、字母、数字、下划线，且不能纯下划线')
    if len(password) < 8 or len(password) > 128:
        return error('密码长度需在 8-128 位之间')
    if len(email) > 254:
        return error('邮箱格式不正确')

    try:
        code_ttl = await asyncio.to_thread(auth.check_verify_code, email, code, 'register')
        if not code_ttl:
            return error('邮箱验证码错误或已过期')
        if await asyncio.to_thread(auth.get_user_by_name, username):
            await asyncio.to_thread(auth.restore_verify_code, email, code, code_ttl, 'register')
            return error('用户名已被注册')
        if email and await asyncio.to_thread(auth.get_user_by_email, email):
            await asyncio.to_thread(auth.restore_verify_code, email, code, code_ttl, 'register')
            return error('该邮箱已被注册，请更换邮箱或联系管理员')

        device_used_flag = bool(device_id) and await asyncio.to_thread(auth.device_used, device_id)
        if ip and await asyncio.to_thread(auth.register_ip_exceeded, ip):
            await asyncio.to_thread(auth.restore_verify_code, email, code, code_ttl, 'register')
            await asyncio.to_thread(auth.add_log, 'fail', username, ip, '注册', '同 IP 24h 注册次数超限')
            return error('当前网络注册过于频繁，请 24 小时后再试或联系管理员')

        credits = await _safe_register_credits()
        if credits < 0:
            credits = 0
        if device_used_flag:
            credits = 0  # 同设备重复注册：账号照建，不再赠送

        try:
            user = await asyncio.to_thread(
                auth.create_user, username, password, email=email, credits=credits,
                device_id=device_id, ip=ip,
                ua=str(request.headers.get('user-agent') or ''),
                register_ip_limit=3, register_device_once=True)
        except sqlite3.IntegrityError:
            await asyncio.to_thread(auth.restore_verify_code, email, code, code_ttl, 'register')
            return error('用户名或邮箱已被注册，请换一个再试')
        except ValueError as e:
            await asyncio.to_thread(auth.restore_verify_code, email, code, code_ttl, 'register')
            await asyncio.to_thread(auth.add_log, 'fail', username, ip, '注册', str(e))
            return error(str(e))

        # 建号事务已提交却读不回（并发删除/库损坏）：按注册失败处理并把验证码还回去，
        # 不让 user['id'] 直接 TypeError 崩成 500
        if user is None:
            await asyncio.to_thread(auth.restore_verify_code, email, code, code_ttl, 'register')
            await asyncio.to_thread(auth.add_log, 'fail', username, ip, '注册', '建号后读取用户失败')
            return error('注册失败，请稍后重试')

        # 建立会话（login_seq 递增 + 签发 Cookie）
        uid = int(user['id'])
        now = int(time.time())
        await db.execute('UPDATE users SET last_active=?, last_login=?, '
                         'login_seq=COALESCE(login_seq,0)+1 WHERE id=?', (now, now, uid))
        fresh = await repo.get_user_by_id(uid) or {}
        seq = int(fresh.get('login_seq') or 1)
        credits = min(credits, max(0, int(fresh.get('duration_seconds') or 0)))
        await asyncio.to_thread(auth.add_log, 'success', username, ip, '注册账号',
                                f'赠送 {credits} 次' if credits else '未赠送次数')
        secure = os.environ.get('ENABLE_SECURE_COOKIE', '').strip().lower() in ('1', 'true', 'yes')
        return _login_cookie_response({
            'user': _user_public(fresh),
            'duration_text': auth.format_credits(int(fresh.get('duration_seconds') or 0)),
            'redirect': 'admin' if fresh.get('role') == 'admin' else 'user',
        }, '注册成功' + (f'，已赠送 {credits} 次下载次数' if credits else ''), uid, seq, secure)
    except Exception:
        return error('注册失败，请稍后重试', 500)