Jeason
20dfda28e3
- timer: 多NTP源取中位数提高精度,新增wait_until_early提前触发 - snatcher: 并发2个tab竞争抢购,reload用commit级别不等渲染 - snatcher: 重试间隔从300ms降到50ms,最大重试5次 - snatcher: 用waitForSelector替代固定sleep,按钮出现即点击 - snatcher: 开售前500ms发起reload,抢占先机 - main.py: 同步所有优化
214 lines
8.0 KiB
Python
214 lines
8.0 KiB
Python
"""
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抢购核心服务 — 优化版
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优化点：
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1. 提前预热：开售前就打开页面并保持连接
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2. 提前刷新：开售前 500ms 发起 reload，用 commit 级别不等渲染
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3. 并发多 tab：同时开 2 个 tab 竞争抢购，谁先成功算谁的
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4. 极速点击：不等 sleep，用 waitForSelector 替代固定等待
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5. 重试间隔极短：50ms 级别快速重试
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"""
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import asyncio
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from playwright.async_api import async_playwright
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from utils.stealth import stealth_async
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from utils.timer import PrecisionTimer
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from server.services.auth_service import get_browser_context, has_auth
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from server.database import get_db
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from datetime import datetime
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# 并发 tab 数量
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CONCURRENT_TABS = 2
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# 最大重试次数（每个 tab）
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MAX_RETRIES = 5
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# 购买按钮文案
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BUY_TEXTS = ["立即抢购", "立即购买", "马上抢", "立即秒杀"]
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async def run_snatch(task_id):
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"""执行单个抢购任务"""
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db = get_db()
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task = db.execute('SELECT * FROM tasks WHERE id = ?', (task_id,)).fetchone()
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if not task:
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return
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account_id = task['account_id']
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if not has_auth(account_id):
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_update_task(db, task_id, 'failed', '账号未登录')
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return
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target_url = task['target_url']
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if not target_url or not target_url.strip():
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_update_task(db, task_id, 'failed',
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'商品链接为空，请检查购物车同步是否获取到了 itemID')
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return
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_update_task(db, task_id, 'running', '正在准备...')
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timer = PrecisionTimer()
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timer.sync_time()
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try:
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async with async_playwright() as p:
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browser, context = await get_browser_context(
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p, account_id, headless=True)
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# ── 1. 预热：打开商品页面 ──
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_update_task(db, task_id, 'running', '预热：打开商品页面...')
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page = await context.new_page()
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await stealth_async(page)
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await page.goto(target_url, wait_until='networkidle',
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timeout=20000)
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# 检查页面状态
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if 'login' in page.url.lower():
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_update_task(db, task_id, 'failed', '登录态已过期')
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await browser.close()
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return
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body_text = await page.locator('body').text_content()
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if '商品不存在' in (body_text or '') or '已下架' in (body_text or ''):
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_update_task(db, task_id, 'failed', '商品不存在或已下架')
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await browser.close()
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return
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# ── 2. 等待抢购时间 ──
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snatch_time = task['snatch_time']
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if snatch_time:
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_update_task(db, task_id, 'running',
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f'等待开售: {snatch_time}')
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# 提前 500ms 触发，因为 reload 本身需要时间
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await timer.wait_until_early(snatch_time, early_ms=500)
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# ── 3. 并发抢购 ──
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_update_task(db, task_id, 'running', '开始抢购...')
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# 创建多个 tab 并发竞争
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pages = [page]
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for _ in range(CONCURRENT_TABS - 1):
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try:
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p2 = await context.new_page()
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await stealth_async(p2)
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await p2.goto(target_url, wait_until='commit',
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timeout=10000)
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pages.append(p2)
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except Exception:
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pass
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# 所有 tab 并发执行抢购
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tasks_coro = [_do_purchase_fast(pg, i) for i, pg in
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enumerate(pages)]
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results = await asyncio.gather(*tasks_coro,
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return_exceptions=True)
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# 取第一个成功的结果
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result = None
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for r in results:
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if isinstance(r, str) and ('已提交' in r or '已发送' in r):
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result = r
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break
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if not result:
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# 没有成功的，取最后一个非异常结果
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for r in results:
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if isinstance(r, str):
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result = r
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if not result:
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result = f"抢购失败: {results}"
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if '已提交' in result or '已发送' in result:
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_update_task(db, task_id, 'completed', result)
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db.execute(
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'INSERT INTO orders (task_id, account_id, status, detail)'
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' VALUES (?, ?, ?, ?)',
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(task_id, account_id, 'submitted', result))
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else:
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_update_task(db, task_id, 'failed', result)
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db.execute(
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'INSERT INTO orders (task_id, account_id, status, detail)'
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' VALUES (?, ?, ?, ?)',
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(task_id, account_id, 'failed', result))
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db.commit()
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await asyncio.sleep(3)
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await browser.close()
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except Exception as e:
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_update_task(db, task_id, 'failed', str(e))
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finally:
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db.close()
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async def _do_purchase_fast(page, tab_index=0):
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"""
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极速购买流程（单个 tab）：
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1. reload 用 commit 级别，不等完整渲染
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2. 用 locator.wait_for 替代固定 sleep
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3. 重试间隔极短
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"""
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for attempt in range(MAX_RETRIES):
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try:
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# ── 刷新页面 ──
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# 用 commit 级别：收到第一个字节就继续，不等 DOM 完整加载
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await page.reload(wait_until='commit', timeout=8000)
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# 短暂等待让关键 DOM 出现（比 networkidle 快很多）
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await asyncio.sleep(0.3)
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# ── 点击购买按钮 ──
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buy_btn = None
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for text in BUY_TEXTS:
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loc = page.get_by_text(text, exact=False)
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try:
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await loc.first.wait_for(state="visible", timeout=1500)
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buy_btn = loc.first
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break
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except Exception:
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continue
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if not buy_btn:
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# 按钮没出现，可能页面还没加载完或还没开售
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if attempt < MAX_RETRIES - 1:
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await asyncio.sleep(0.05) # 50ms 后重试
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continue
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return f"tab{tab_index}: 未找到购买按钮"
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await buy_btn.click(timeout=2000)
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# ── 处理 SKU 弹窗 ──
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try:
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confirm_btn = page.get_by_text("确定", exact=True)
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await confirm_btn.first.wait_for(state="visible",
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timeout=1500)
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# 选第一个可用 SKU
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sku_sel = ('.sku-item:not(.disabled), '
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'.sku_item:not(.disabled), '
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'[class*="sku"] [class*="item"]'
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':not([class*="disabled"])')
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sku_items = page.locator(sku_sel)
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if await sku_items.count() > 0:
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await sku_items.first.click()
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await asyncio.sleep(0.1)
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await confirm_btn.first.click(timeout=2000)
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except Exception:
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# 没有 SKU 弹窗，直接继续
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pass
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# ── 提交订单 ──
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submit_btn = page.get_by_text("提交订单")
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await submit_btn.wait_for(state="visible", timeout=6000)
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await submit_btn.click()
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return f"tab{tab_index}: 抢购请求已提交"
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except Exception as e:
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if attempt < MAX_RETRIES - 1:
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await asyncio.sleep(0.05)
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continue
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return f"tab{tab_index}: 抢购失败: {e}"
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return f"tab{tab_index}: 重试次数用尽"
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def _update_task(db, task_id, status, result):
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db.execute(
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"UPDATE tasks SET status = ?, result = ?, updated_at = ? WHERE id = ?",
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(status, result, datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
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task_id))
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db.commit()
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