Comparing Scrapy Logs for the cases of Success and Failure for Wikipedia 


FIRST, GENERATING THE GENERIC BOILERPLATE SPIDER CODE:

(base) D:\exp_54>scrapy startproject myscraper
New Scrapy project 'myscraper', using template directory 'c:\users\ashish\appdata\local\continuum\anaconda3\lib\site-packages\scrapy\templates\project', created in:
    D:\exp_54\myscraper

You can start your first spider with:
    cd myscraper
    scrapy genspider example example.com

(base) D:\exp_54>

...

(base) D:\exp_54>cd myscraper

(base) D:\exp_54\myscraper>scrapy genspider jenkins wikipedia.org
Created spider 'jenkins' using template 'basic' in module:
  myscraper.spiders.jenkins
 
...
    
LOGS FOR THE CASE OF SUCCESS:

SPIDER CODE:

# -*- coding: utf-8 -*-
import scrapy

class JenkinsSpider(scrapy.Spider):
    name = 'jenkins'

    allowed_domains = ['wikipedia.org']
    start_urls = ['https://wikipedia.org']

    def parse(self, response):
        rtnVal = {"text": response.text}
        yield rtnVal

LOGS:

(base) D:\exp_54\myscraper>scrapy crawl jenkins

2020-01-01 12:57:02 [scrapy.utils.log] INFO: Scrapy 1.8.0 started (bot: myscraper)
2020-01-01 12:57:02 [scrapy.utils.log] INFO: Versions: lxml 4.2.5.0, libxml2 2.9.8, cssselect 1.1.0, parsel 1.5.2, w3lib 1.21.0, Twisted 18.9.0, Python 3.7.1 (default, Dec 10 2018, 22:54:23) [MSC v.1915 64 bit (AMD64)], pyOpenSSL 18.0.0 (OpenSSL 1.1.1a  20 Nov 2018), cryptography 2.4.2, Platform Windows-10-10.0.16299-SP0
2020-01-01 12:57:02 [scrapy.crawler] INFO: Overridden settings: {'BOT_NAME': 'myscraper', 'NEWSPIDER_MODULE': 'myscraper.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['myscraper.spiders']}
2020-01-01 12:57:05 [scrapy.extensions.telnet] INFO: Telnet Password: 02d4f5cdde3160c1
2020-01-01 12:57:07 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.logstats.LogStats']
2020-01-01 12:57:09 [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']
2020-01-01 12:57:09 [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']
2020-01-01 12:57:09 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2020-01-01 12:57:09 [scrapy.core.engine] INFO: Spider opened
2020-01-01 12:57:10 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2020-01-01 12:57:10 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2020-01-01 12:57:12 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to [[ GET https://www.wikipedia.org/robots.txt> from [[ GET https://wikipedia.org/robots.txt>
2020-01-01 12:57:13 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to [[ GET https://en.wikipedia.org/robots.txt> from [[ GET https://www.wikipedia.org/robots.txt>
2020-01-01 12:57:14 [scrapy.core.engine] DEBUG: Crawled (200) [[ GET https://en.wikipedia.org/robots.txt> (referer: None)
2020-01-01 12:57:14 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to [[ GET https://www.wikipedia.org/> from [[ GET https://wikipedia.org>
2020-01-01 12:57:15 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to [[ GET https://en.wikipedia.org/robots.txt> from [[ GET https://www.wikipedia.org/robots.txt>
2020-01-01 12:57:15 [scrapy.core.engine] DEBUG: Crawled (200) [[ GET https://en.wikipedia.org/robots.txt> (referer: None)
2020-01-01 12:57:16 [scrapy.core.engine] DEBUG: Crawled (200) [[ GET https://www.wikipedia.org/> (referer: None)
2020-01-01 12:57:16 [scrapy.core.scraper] DEBUG: Scraped from <200 https://www.wikipedia.org/>
{'text': 'all the Wikipedia page HTML comes here... ... ...'}
2020-01-01 12:57:16 [scrapy.core.engine] INFO: Closing spider (finished)
2020-01-01 12:57:16 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 2194,
 'downloader/request_count': 7,
 'downloader/request_method_count/GET': 7,
 'downloader/response_bytes': 34251,
 'downloader/response_count': 7,
 'downloader/response_status_count/200': 3,
 'downloader/response_status_count/301': 4,
 'elapsed_time_seconds': 6.365701,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2020, 3, 12, 7, 27, 16, 431765),
 'item_scraped_count': 1,
 'log_count/DEBUG': 8,
 'log_count/INFO': 10,
 'response_received_count': 3,
 'robotstxt/request_count': 2,
 'robotstxt/response_count': 2,
 'robotstxt/response_status_count/200': 2,
 'scheduler/dequeued': 2,
 'scheduler/dequeued/memory': 2,
 'scheduler/enqueued': 2,
 'scheduler/enqueued/memory': 2,
 'start_time': datetime.datetime(2020, 3, 12, 7, 27, 10, 66064)}
2020-01-01 12:57:16 [scrapy.core.engine] INFO: Spider closed (finished)

(base) D:\exp_54\myscraper>


LOGS FOR THE CASE OF FAILURE:

SPIDER CODE:

#coding: utf-8
import scrapy

def authentication_failed(response):
    # TODO: Check the contents of the response and return True if it failed
    # or False if it succeeded.
    pass


class JenkinsSpider(scrapy.Spider):
    name = 'jenkins'

    allowed_domains = ['wikipedia.org']
    start_urls = ['https://wikipedia.org']

    def parse(self, response):
        return scrapy.FormRequest.from_response(
            response,
            formdata={'username': 'un', 'password': 'pw'},
            callback=self.after_login
        )

    def after_login(self, response):
        if authentication_failed(response):
            self.logger.error("Login failed")
            return

        # continue scraping with authenticated session...


LOGS:

(base) D:\exp_54\myscraper>scrapy crawl jenkins
2020-01-01 12:41:34 [scrapy.utils.log] INFO: Scrapy 1.8.0 started (bot: myscraper)
2020-01-01 12:41:34 [scrapy.utils.log] INFO: Versions: lxml 4.2.5.0, libxml2 2.9.8, cssselect 1.1.0, parsel 1.5.2, w3lib 1.21.0, Twisted 18.9.0, Python 3.7.1 (default, Dec 10 2018, 22:54:23) [MSC v.1915 64 bit (AMD64)], pyOpenSSL 18.0.0 (OpenSSL 1.1.1a  20 Nov 2018), cryptography 2.4.2, Platform Windows-10-10.0.16299-SP0
2020-01-01 12:41:35 [scrapy.crawler] INFO: Overridden settings: {'BOT_NAME': 'myscraper', 'NEWSPIDER_MODULE': 'myscraper.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['myscraper.spiders']}
2020-01-01 12:41:38 [scrapy.extensions.telnet] INFO: Telnet Password: 215145cb94d733c3
2020-01-01 12:41:41 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.logstats.LogStats']
2020-01-01 12:41:46 [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']
2020-01-01 12:41:46 [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']
2020-01-01 12:41:46 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2020-01-01 12:41:46 [scrapy.core.engine] INFO: Spider opened
2020-01-01 12:41:46 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2020-01-01 12:41:46 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2020-01-01 12:41:49 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to [[ GET https://www.wikipedia.org/robots.txt> from [[ GET https://wikipedia.org/robots.txt>
2020-01-01 12:41:50 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to [[ GET https://en.wikipedia.org/robots.txt> from [[ GET https://www.wikipedia.org/robots.txt>
2020-01-01 12:41:52 [scrapy.core.engine] DEBUG: Crawled (200) [[ GET https://en.wikipedia.org/robots.txt> (referer: None)
2020-01-01 12:41:52 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to [[ GET https://www.wikipedia.org/> from [[ GET https://wikipedia.org>
2020-01-01 12:41:52 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to [[ GET https://en.wikipedia.org/robots.txt> from [[ GET https://www.wikipedia.org/robots.txt>
2020-01-01 12:41:53 [scrapy.core.engine] DEBUG: Crawled (200) [[ GET https://en.wikipedia.org/robots.txt> (referer: None)
2020-01-01 12:41:53 [scrapy.core.engine] DEBUG: Crawled (200) [[ GET https://www.wikipedia.org/> (referer: None)
2020-01-01 12:41:55 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to [[ GET https://en.wikipedia.org/wiki/Special:Search?search=&go=Go> from [[ GET https://www.wikipedia.org/search-redirect.php?family=wikipedia&language=en&search=&language=en&go=Go&username=un&password=pw>
2020-01-01 12:41:55 [scrapy.core.engine] DEBUG: Crawled (200) [[ GET https://en.wikipedia.org/robots.txt> (referer: None)
2020-01-01 12:41:56 [scrapy.downloadermiddlewares.robotstxt] DEBUG: Forbidden by robots.txt: [[ GET https://en.wikipedia.org/wiki/Special:Search?search=&go=Go>
2020-01-01 12:41:56 [scrapy.core.engine] INFO: Closing spider (finished)
2020-01-01 12:41:56 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/exception_count': 1,
 'downloader/exception_type_count/scrapy.exceptions.IgnoreRequest': 1,
 'downloader/request_bytes': 2994,
 'downloader/request_count': 9,
 'downloader/request_method_count/GET': 9,
 'downloader/response_bytes': 40740,
 'downloader/response_count': 9,
 'downloader/response_status_count/200': 4,
 'downloader/response_status_count/301': 4,
 'downloader/response_status_count/302': 1,
 'elapsed_time_seconds': 9.721023,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2020, 3, 12, 7, 11, 56, 241535),
 'log_count/DEBUG': 10,
 'log_count/INFO': 10,
 'request_depth_max': 1,
 'response_received_count': 4,
 'robotstxt/forbidden': 1,
 'robotstxt/request_count': 3,
 'robotstxt/response_count': 3,
 'robotstxt/response_status_count/200': 3,
 'scheduler/dequeued': 4,
 'scheduler/dequeued/memory': 4,
 'scheduler/enqueued': 4,
 'scheduler/enqueued/memory': 4,
 'start_time': datetime.datetime(2020, 3, 12, 7, 11, 46, 520512)}
2020-01-01 12:41:56 [scrapy.core.engine] INFO: Spider closed (finished)

(base) D:\exp_54\myscraper>

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