我用pyppeteer做了一个爬虫taobao.com的测试。淘宝网有识别码，就是滑块按钮，所以我在代码中添加了一些方法。但错误发生在代码运行时。像这样的错误信息：
2018-11-30 18:15:32 [websockets.protocol] 调试：客户端！在 OPEN 状态下失败的 WebSocket 连接：1006 [no reason] 2018-11-30 18:15:32 [websockets.protocol] DEBUG: client - event = connection_lost(None) 2018-11-30 18:15:32 [websockets .protocol] 调试：客户端 - 状态 = CLOSED 2018-11-30 18:15:32 [websockets.protocol] 调试：客户端 x 代码 = 1006，原因 = [无原因] 2018-11-30 18:15:32 [ websockets.protocol] 调试：客户端 - 中止挂起 ping：7ac33fd3 [I:pyppeteer.connection] 连接关闭协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************:幻灯片登录 False
协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************:幻灯片登录 False
协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************:幻灯片登录 False
协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************:幻灯片登录 False
协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************：幻灯片登录错误协议错误（Runtime.callFunctionOn）：会话关闭。该页面很可能已关闭。***********************************:幻灯片登录 False
....死循环像上面的信息。
该错误发生在滑块按钮滚动几次后，（滑块按钮需要滚动更多次），但应该一直持续到动作成功。因为我在代码中设置了重试。我想知道为什么连接关闭。
核心代码是这样的
**#middlewares.py**
from scrapy import signals
from scrapy.http import HtmlResponse
from logging import getLogger
import asyncio
import time, os
from pyppeteer.launcher import launch
from seleniumtest.moveslider import mouse_slide, input_time_random
from seleniumtest.jsflagsetter import js1, js3, js4, js5
class SeleniumMiddleware():
def __init__(self,username=None, password=None, timeout=None):
self.logger = getLogger(__name__);
self.username=username;
self.password=password;
self.timeout = timeout;
print("Init downloaderMiddleware use pypputeer.")
os.environ['PYPPETEER_CHROMIUM_REVISION'] ='588429'
# pyppeteer.DEBUG = False
print(os.environ.get('PYPPETEER_CHROMIUM_REVISION'))
loop = asyncio.get_event_loop();
task = asyncio.ensure_future(self.getbrowser());
loop.run_until_complete(task);
async def getbrowser(self):
self.browser = await launch({
'headless': False,
'userDataDir':'tmp',
'args': ['--no-sandbox'],
'executablePath': "C:\\Users\\Edwin\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
'dumpio':True
}
)
self.page = await self.browser.newPage();
async def usePypuppeteer(self, current_page, url):
await asyncio.sleep(0.3);
await self.page.setUserAgent(
'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 \
(KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36')
await self.page.setViewport({'width': 1366, 'height': 768 });
response = await self.page.goto(url, options={'timeout': self.timeout * 1000});
if response.status != 200:
return None;
# evaluate with script
await self.page.evaluate(js1)
await self.page.evaluate(js3)
await self.page.evaluate(js4)
await self.page.evaluate(js5)
if current_page == 1:
try:
login_text = await self.page.Jeval('.qrcode-login .login-title', 'node => node.textContent');
except Exception as e:
login_text = None;
if login_text:
if login_text == '手机扫码，安全登录':
switch_btn = await self.page.querySelector('.login-switch #J_Quick2Static');
await self.page.evaluate('(element) => element.click()', switch_btn);
else:
pass;
user_edit = await self.page.querySelector('.login-text.J_UserName');
await self.page.evaluate('(element) => element.value = ""', user_edit);
await user_edit.type(self.username, {'delay': input_time_random()});
await self.page.type('#J_StandardPwd #TPL_password_1', self.password, {'delay': input_time_random()})
time.sleep(1)
slider = await self.page.Jeval('#nocaptcha', 'node => node.style')
if slider:
flag = await mouse_slide(page=self.page)
if flag:
try:
print('******************** get logging button');
login_btn = await self.page.querySelector('#J_SubmitStatic');
await self.page.evaluate('(element) => element.click()', login_btn);
await self.page.waitForSelector('#mainsrp-itemlist .m-itemlist');
await self.get_cookie(self.page);
content = await self.page.content();
return content;
except Exception as e:
return None;
else:
return None;
else:
try:
await self.page.keyboard.press('Enter') #press enter
await self.page.waitFor(20)
await self.page.waitForSelector('#mainsrp-itemlist .m-itemlist');
content = await self.page.content();
return content;
except Exception as e:
return None;
else:
try:
input = await self.page.querySelector('#mainsrp-pager div.form > input');
submit = await self.page.querySelector('#mainsrp-pager div.form > span.btn.J_Submit');
await self.page.evaluate('(element) => element.value = ""', input);
await input.type(current_page);
await submit.click();
await self.page.waitForSelector('#mainsrp-itemlist .m-itemlist');
current_page_text = await self.page.Jeval('#mainsrp-pager li.item.active > span', 'node => node.textContent');
items = await self.page.Jeval('.m-itemlist .items .item');
if current_page_text == str(current_page) and items:
content = await self.page.content();
return content;
else:
return None;
except Exception as e:
return None;
def process_request(self, request, spider):
self.logger.debug('Browser is Starting');
current_page= request.meta.get('page', 1);
loop = asyncio.get_event_loop();
task = asyncio.ensure_future(self.usePypuppeteer(current_page, request.url));
loop.run_until_complete(task);
return HtmlResponse(url=request.url, body=task.result(), encoding="utf-8",request=request, status=200);
@classmethod
def from_crawler(cls, crawler):
s = cls(username=crawler.settings.get('USERNAME'),
password=crawler.settings.get('PASSWORD'),
timeout=crawler.settings.get('TIMEOUT')
);
crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
return s
async def get_cookie(page):
res = await page.content()
cookies_list = await page.cookies()
cookies = ''
for cookie in cookies_list:
str_cookie = '{0}={1};'
str_cookie = str_cookie.format(cookie.get('name'), cookie.get('value'))
cookies += str_cookie
return cookies
def process_response(self, request, response, spider):
return response;
def process_exception(self, request, exception, spider):
pass
def spider_opened(self, spider):
spider.logger.info('Spider opened: %s' % spider.name);
**#moveslider.py**
# -*- coding:utf-8 -*-
from retrying import retry
import time, asyncio, random
def retry_if_result_none(result):
return result is None
def tries(func):
def func_wrapper(f):
async def wrapper(*args, **kwargs):
while True:
try:
if func(await f(*args, **kwargs)):
continue
else:
break
except Exception as exc:
pass
return True
return wrapper
return func_wrapper
@tries(retry_if_result_none)
async def mouse_slide(page=None):
try:
await page.hover('#nc_1_n1z') #move to slider button
await page.mouse.down() # press tee mouse
await page.mouse.move(1700, 0, {'delay': random.randint(1000, 2000)}) # move mouse to speial location
await page.mouse.up() # release mouse
except Exception as e:
print(e, '***********************************:slide login False')
slider_move_text = await page.Jeval('.errloading .nc-lang-cnt', 'node => node.textContent'); #get
print('**********************,slider_move_text=', slider_move_text);
if "哎呀，出错了，点击" in slider_move_text:
refresh_btn = await page.querySelector('.errloading .nc-lang-cnt a');
await page.evaluate('(element) => element.click()', refresh_btn);
await asyncio.sleep(3);
return None
else:
await asyncio.sleep(3)
slider_again = await page.Jeval('.nc-lang-cnt', 'node => node.textContent')
if slider_again != '验证通过':
return None
else:
await page.screenshot({'path': './headless-slide-result.png'})
return 1
def input_time_random():
return random.randint(100, 151)
**#taobao.py**
# -*- coding: utf-8 -*-
import scrapy
from scrapy import Request, Spider
from urllib.parse import quote
from seleniumtest.items import ProductItem
import json
class TaobaoSpider(scrapy.Spider):
name = 'taobao'
allowed_domains = ['www.taobao.com']
base_url = 'https://s.taobao.com/search?q='
def start_requests(self):
for keyword in self.settings.get('KEYWORDS'):
for page in range(1, self.settings.get('MAX_PAGE')+1):
url = self.base_url + quote(keyword);
yield Request(url=url, callback=self.parse, meta={'page':page}, dont_filter=True);
def parse(self, response):
products = response.xpath('//div[@id="mainsrp-itemlist"]//div[@class="items"][1]//div[contains(@class,"item")]');
for product in products:
item = ProductItem();
item['price'] = ''.join(product.xpath('.//div[contains(@class,"price")]//text()').extract()).strip();
item['title'] = ''.join(product.xpath('.//div[contains(@class,"title")]//text()').extract()).strip();
item['shop'] = ''.join(product.xpath('.//div[contains(@class,"shop")]//text()').extract()).strip();
item['image'] = ''.join(product.xpath('.//div[@class="pic"]//img[contains(@class,"img")]/@data-src').extract()).strip();
item['deal'] = product.xpath('.//div[contains(@class,"deal-cnt")]//textxt()').extract_first();
item['location'] = product.xpath('.//div[@class="location"]//text()').extract_first();
print(item['price'], item['title'], item['shop'], item['image'], item['deal'], item['location']);
yield item;