说了个啥0.0，完全没懂他讲那个动态页面和静态页面的逻辑，根本没讲明白啊，感觉就是想到啥说啥

怎么回事

你的请求头中包含了 X-Forwarded-For 字段，字段包含了客户端的真实 IP 地址以及代理服务器的 IP 地址

能详细讲一讲嘛

docker run  --name mytomcat -p 8080:8080 -v /opt/webapps:/usr/local/tomcat/webapps -d  tomcat

我执行之后 查看了docker ps 发现没有运行

我在chrome浏览器中加载了omega扩展程序，但Switchyomega选项无法打开，是什么原因？

老师，我这个在本地可以运行，我布置到虚拟机上就一直报错这个，我还重新装载了一次虚拟机，redis的配置文件也都该过。还是不行，这个是为什么啊

希望老师分享一下有道云笔记内容，谢谢，想参考的学习一下

老师 为什么进不去parse_info?

为什么会出现这种情况？

这个是什么情况

D:\python文件\爬虫\demo\first_scrapy>scrapy crawl baidu

2020-05-26 18:03:37 [scrapy.utils.log] INFO: Scrapy 2.1.0 started (bot: first_scrapy)

2020-05-26 18:03:37 [scrapy.utils.log] INFO: Versions: lxml 4.5.1.0, libxml2 2.9.5, cssselect 1.1.0, parsel 1.6.0, w3lib 1.22.0, Twisted 20.3.0, Python 3.7.6 (tags/v3.7.6:43364a7ae0, De

c 19 2019, 00:42:30) [MSC v.1916 64 bit (AMD64)], pyOpenSSL 19.1.0 (OpenSSL 1.1.1g  21 Apr 2020), cryptography 2.9.2, Platform Windows-10-10.0.17134-SP0

2020-05-26 18:03:37 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.selectreactor.SelectReactor

2020-05-26 18:03:37 [scrapy.crawler] INFO: Overridden settings:

{'BOT_NAME': 'first_scrapy',

 'NEWSPIDER_MODULE': 'first_scrapy.spiders',

 'ROBOTSTXT_OBEY': True,

 'SPIDER_MODULES': ['first_scrapy.spiders']}

2020-05-26 18:03:37 [scrapy.extensions.telnet] INFO: Telnet Password: 2dc378fbfcafc19b

2020-05-26 18:03:37 [scrapy.middleware] INFO: Enabled extensions:

['scrapy.extensions.corestats.CoreStats',

 'scrapy.extensions.telnet.TelnetConsole',

 'scrapy.extensions.logstats.LogStats']

2020-05-26 18:03:37 [scrapy.middleware] INFO: Enabled downloader middlewares:

['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware',

 'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',

 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',

 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',

 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',

 'scrapy.downloadermiddlewares.retry.RetryMiddleware',

 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',

 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',

 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',

 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',

 'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',

 'scrapy.downloadermiddlewares.stats.DownloaderStats']

2020-05-26 18:03:37 [scrapy.middleware] INFO: Enabled spider middlewares:

['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',

 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',

 'scrapy.spidermiddlewares.referer.RefererMiddleware',

 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',

 'scrapy.spidermiddlewares.depth.DepthMiddleware']

2020-05-26 18:03:37 [scrapy.middleware] INFO: Enabled item pipelines:

[]

2020-05-26 18:03:37 [scrapy.core.engine] INFO: Spider opened

2020-05-26 18:03:37 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)

2020-05-26 18:03:37 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023

2020-05-26 18:03:37 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://baidu.com/robots.txt> (referer: None)

2020-05-26 18:03:37 [scrapy.downloadermiddlewares.robotstxt] DEBUG: Forbidden by robots.txt: <GET http://baidu.com/>

2020-05-26 18:03:38 [scrapy.core.engine] INFO: Closing spider (finished)

2020-05-26 18:03:38 [scrapy.statscollectors] INFO: Dumping Scrapy stats:

{'downloader/exception_count': 1,

 'downloader/exception_type_count/scrapy.exceptions.IgnoreRequest': 1,

 'downloader/request_bytes': 219,

 'downloader/request_count': 1,

 'downloader/request_method_count/GET': 1,

 'downloader/response_bytes': 2680,

 'downloader/response_count': 1,

 'downloader/response_status_count/200': 1,

 'elapsed_time_seconds': 0.291164,

 'finish_reason': 'finished',

 'finish_time': datetime.datetime(2020, 5, 26, 10, 3, 38, 88538),

 'log_count/DEBUG': 2,

 'log_count/INFO': 10,

 'response_received_count': 1,

 'robotstxt/forbidden': 1,

 'robotstxt/request_count': 1,

 'robotstxt/response_count': 1,

 'robotstxt/response_status_count/200': 1,

 'scheduler/dequeued': 1,

 'scheduler/dequeued/memory': 1,

 'scheduler/enqueued': 1,

 'scheduler/enqueued/memory': 1,

 'start_time': datetime.datetime(2020, 5, 26, 10, 3, 37, 797374)}

2020-05-26 18:03:38 [scrapy.core.engine] INFO: Spider closed (finished)

我也是按照视频爬百度，没有返回html

老师，我这用协程访问https网页出现了SSL证书验证错误问题要怎么解决的，通常多线程和协程爬虫哪个用得多呢

这段代码是什么意思呢

在crawlspider中pipeline会复用吗？

老师，用爬虫爬取数据的时候，假如服务器允许10个人访问，为啥爬虫会占用一个以上的资源？