Obey Robots.txt

[JohnMTrimbleIII]

Is scrapy-splash not compatible with obeying robots.txt? Everytime I make a query it attempts to download the robots.txt from the docker instance of scrapy-splash. The below is my settings file. I'm thinking it may be a misordering of the middlewares, but I'm not sure what it should look like.

# -*- coding: utf-8 -*-

# Scrapy settings for ishop project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     https://doc.scrapy.org/en/latest/topics/settings.html
#     https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
#     https://doc.scrapy.org/en/latest/topics/spider-middleware.html

BOT_NAME = 'ishop'

SPIDER_MODULES = ['ishop.spiders']
NEWSPIDER_MODULE = 'ishop.spiders'


# Crawl responsibly by identifying yourself (and your website) on the user-agent
# USER_AGENT = 'ishop (+http://www.ishop.com)'

# Obey robots.txt rules
ROBOTSTXT_OBEY = True

# Configure maximum concurrent requests performed by Scrapy (default: 16)
# CONCURRENT_REQUESTS = 32

# Configure a delay for requests for the same website (default: 0)
# See https://doc.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
# DOWNLOAD_DELAY = 5
# The download delay setting will honor only one of:
# CONCURRENT_REQUESTS_PER_DOMAIN = 16
#CONCURRENT_REQUESTS_PER_IP = 16

# Disable cookies (enabled by default)
COOKIES_ENABLED = False

# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False

# Override the default request headers:
#DEFAULT_REQUEST_HEADERS = {
#   'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
#   'Accept-Language': 'en',
#}

# Enable or disable spider middlewares
# See https://doc.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
#    'ishop.middlewares.IshopSpiderMiddleware': 543,
#}

# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
#    'ishop.middlewares.IshopDownloaderMiddleware': 543,
#}



# Enable or disable extensions
# See https://doc.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
#    'scrapy.extensions.telnet.TelnetConsole': None,
#}

# Configure item pipelines
# See https://doc.scrapy.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {
   'ishop.pipelines.HbasePipeline': 100
}

# Enable and configure the AutoThrottle extension (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/autothrottle.html
AUTOTHROTTLE_ENABLED = True
# The initial download delay
#AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
#AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
#AUTOTHROTTLE_DEBUG = False

# Enable and configure HTTP caching (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
#HTTPCACHE_ENABLED = True
#HTTPCACHE_EXPIRATION_SECS = 0
#HTTPCACHE_DIR = 'httpcache'
#HTTPCACHE_IGNORE_HTTP_CODES = []
#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'


SPIDER_MIDDLEWARES = {
    'frontera.contrib.scrapy.middlewares.schedulers.SchedulerSpiderMiddleware': 25,
    'frontera.contrib.scrapy.middlewares.seeds.file.FileSeedLoader': 650,
    'scrapy_splash.SplashDeduplicateArgsMiddleware': 100,
    
}


DOWNLOADER_MIDDLEWARES = {
    'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware': None,
    'scrapy.downloadermiddlewares.retry.RetryMiddleware': 90,
    'scrapy_fake_useragent.middleware.RandomUserAgentMiddleware': 400,
    'frontera.contrib.scrapy.middlewares.schedulers.SchedulerDownloaderMiddleware': 999,
    'scrapy_splash.SplashCookiesMiddleware': 723,
    'scrapy_splash.SplashMiddleware': 725,
    'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware': 750,    
    'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware': 810
}


SCHEDULER = 'frontera.contrib.scrapy.schedulers.frontier.FronteraScheduler'


# Retry many times since proxies often fail
RETRY_TIMES = 10
# Retry on most error codes since proxies fail for different reasons
RETRY_HTTP_CODES = [500, 503, 504, 400, 403, 404, 408]





FRONTERA_SETTINGS = 'ishop.frontera.spiders'  # module path to your Frontera spider config module



SPLASH_URL = 'http://127.0.0.1:8050'
# SPLASH_URL= 'http://172.17.0.2:8050'


DUPEFILTER_CLASS = 'scrapy_splash.SplashAwareDupeFilter'

[ArthurJ]

+1 I'm having the same problem. The spider looks for http://localhost:8050/robots.txt, that does not exist. And I'm having trouble to implement the rules of my target site.

[Tobias-Keller]

same problem here... spider first downloading the correct robots and then trys to download localhost robots. 2019-02-16 21:51:02 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://testwebsite.de/robots.txt> (referer: None)

2019-02-16 21:51:02 [scrapy.core.engine] DEBUG: Crawled (404) <GET http://localhost:8050/robots.txt> (referer: None)

[JavierRuano]

Robots.txt is read at the start of crawling. You could disable that feature from settings or to write a middleware apropos robots.

https://docs.scrapy.org/en/latest/topics/settings.html

https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#topics-dlmw-robots

https://stackoverflow.com/questions/37274835/getting-forbidden-by-robots-txt-scrapy

El sáb., 16 feb. 2019 21:53, Tobias Keller [email protected] escribió:

same problem here

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[ArthurJ]

I disabled the robotstxt midware, sub-classed it and changed the line that loads the file in the first place. So it took the right URL and worked.

In my case, I wanted to obey the robots.txt file. Just turn it off was not a solution.

[Tobias-Keller]

I disabled the robotstxt midware, sub-classed it and changed the line that loads the file in the first place. So it took the right URL and worked.

In my case, I wanted to obey the robots.txt file. Just turn it off was not a solution.

can you share this? disabling the hole robots is no option.

[ArthurJ]

    from scrapy.downloadermiddlewares.robotstxt import RobotsTxtMiddleware
    from scrapy.http import Request
    from twisted.internet.defer import Deferred

    from scrapy.utils.httpobj import urlparse_cached


    class MyRobotsTxtMiddleware(RobotsTxtMiddleware):
        
        def robot_parser(self, request, spider):
            url = urlparse_cached(request)
            netloc = url.netloc

            if netloc not in self._parsers:
                self._parsers[netloc] = Deferred()
                robotsurl = "https://www.example.com/robots.txt"
                robotsreq = Request(
                    robotsurl,
                    priority=self.DOWNLOAD_PRIORITY,
                    meta={'dont_obey_robotstxt': True}
                )
                dfd = self.crawler.engine.download(robotsreq, spider)
                dfd.addCallback(self._parse_robots, netloc)
                dfd.addErrback(self._logerror, robotsreq, spider)
                dfd.addErrback(self._robots_error, netloc)
                self.crawler.stats.inc_value('robotstxt/request_count')

            if isinstance(self._parsers[netloc], Deferred):
                d = Deferred()
                def cb(result):
                    d.callback(result)
                    return result
                self._parsers[netloc].addCallback(cb)
                return d
            else:
                return self._parsers[netloc]

[ArthurJ]

SPIDER_MIDDLEWARES = {
    'mycrawler.middlewares.MyRobotsTxtMiddleware': 1,
    'scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware':None

[laisbsc]

    from scrapy.downloadermiddlewares.robotstxt import RobotsTxtMiddleware
    from scrapy.http import Request
    from twisted.internet.defer import Deferred

    from scrapy.utils.httpobj import urlparse_cached


    class MyRobotsTxtMiddleware(RobotsTxtMiddleware):
        
        def robot_parser(self, request, spider):
            url = urlparse_cached(request)
            netloc = url.netloc

            if netloc not in self._parsers:
                self._parsers[netloc] = Deferred()
                robotsurl = "https://www.example.com/robots.txt"
                robotsreq = Request(
                    robotsurl,
                    priority=self.DOWNLOAD_PRIORITY,
                    meta={'dont_obey_robotstxt': True}
                )
                dfd = self.crawler.engine.download(robotsreq, spider)
                dfd.addCallback(self._parse_robots, netloc)
                dfd.addErrback(self._logerror, robotsreq, spider)
                dfd.addErrback(self._robots_error, netloc)
                self.crawler.stats.inc_value('robotstxt/request_count')

            if isinstance(self._parsers[netloc], Deferred):
                d = Deferred()
                def cb(result):
                    d.callback(result)
                    return result
                self._parsers[netloc].addCallback(cb)
                return d
            else:
                return self._parsers[netloc]

@ArthurJ where did you add this code, though? I'm quite a newbie on web crawling and I have been having huge trouble with my crawler not returning what it should. Thanks.

[jazminebarroga]

The same thing happens to me where the spider first downloads the correct robots and then tries to download localhost robots. However I still see on my logs that some links are Forbidden by robots.txt so I'm a bit confused whether the spider really obeys robot.txt or not.