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(12)Scrapy执行爬行捉取



要执行蜘蛛抓取数据,在 first_scrapy 目录中运行以下命令:

scrapy crawl first

在这里,first 是创建蜘蛛时指定的蜘蛛名称。

当蜘蛛开始抓取后,可以看到如下面的输出:

D:first_scrapy>scrapy crawl first
2016-10-03 10:40:10 [scrapy] INFO: Scrapy 1.1.2 started (bot: first_scrapy)
2016-10-03 10:40:10 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'first_scrapy.spiders', 'SPIDER_MODULES': ['first_scrapy.spiders'], 'ROBOTSTXT_OBEY': True, 'BOT_NAME': 'first_scrapy'}
2016-10-03 10:40:10 [scrapy] INFO: Enabled extensions:
['scrapy.extensions.logstats.LogStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.corestats.CoreStats']
2016-10-03 10:40:11 [scrapy] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware',
 'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
 'scrapy.downloadermiddlewares.retry.RetryMiddleware',
 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
 'scrapy.downloadermiddlewares.chunked.ChunkedTransferMiddleware',
 'scrapy.downloadermiddlewares.stats.DownloaderStats']
2016-10-03 10:40:11 [scrapy] INFO: Enabled spider middlewares:
['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
 'scrapy.spidermiddlewares.referer.RefererMiddleware',
 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
 'scrapy.spidermiddlewares.depth.DepthMiddleware']
2016-10-03 10:40:11 [scrapy] INFO: Enabled item pipelines:
[]
2016-10-03 10:40:11 [scrapy] INFO: Spider opened
2016-10-03 10:40:11 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2016-10-03 10:40:11 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023
2016-10-03 10:40:11 [scrapy] DEBUG: Crawled (200) <GET http://www.yiibai.com/robots.txt> (referer: None)
2016-10-03 10:40:11 [scrapy] DEBUG: Crawled (200) <GET http://www.yiibai.com/scrapy/scrapy_create_project.html> (referer: None)
2016-10-03 10:40:11 [scrapy] DEBUG: Crawled (200) <GET http://www.yiibai.com/scrapy/scrapy_environment.html> (referer: None)
Curent URL =>  scrapy_create_project.html
Curent URL =>  scrapy_environment.html
2016-10-03 10:40:12 [scrapy] INFO: Closing spider (finished)
2016-10-03 10:40:12 [scrapy] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 709,
 'downloader/request_count': 3,
 'downloader/request_method_count/GET': 3,
 'downloader/response_bytes': 15401,
 'downloader/response_count': 3,
 'downloader/response_status_count/200': 3,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2016, 10, 3, 2, 40, 12, 98000),
 'log_count/DEBUG': 4,
 'log_count/INFO': 7,
 'response_received_count': 3,
 'scheduler/dequeued': 2,
 'scheduler/dequeued/memory': 2,
 'scheduler/enqueued': 2,
 'scheduler/enqueued/memory': 2,
 'start_time': datetime.datetime(2016, 10, 3, 2, 40, 11, 614000)}
2016-10-03 10:40:12 [scrapy] INFO: Spider closed (finished)

D:first_scrapy>

正如你在输出中看到的, 每个URL有一个日志行,其中(引用:None)表示,网址是起始网址,它没有引用。接下来,应该看到有两个名为 scrapy_environment.htmlscrapy_environment.html 的文件在 first_scrapy 这个目录中有被创建。
如下所示 –

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