我试图从这个website中获取数据,但是我得到的是带有scrapy的空列表。我使用selector gadget来获取元素的类名。所以我检查了网站的robots.txt
文件,我访问的链接被禁止了。你知道吗
然后,我使用User-Agent
绕过限制,但仍然想知道为什么在提取元素时得到空列表。你知道吗
下面是我的Spider
类:
class FlightDestinationSpider(scrapy.Spider):
name = 'flights_destinations'
start_urls = [
"https:/xxxxxxxxxxxx"
]
def parse(self, response):
# flights = HuxyscrapperItem()
# div_flight_table = response.css('div.detail-table__row')
time1 = response.css('.fdabf-td2').css('::text').extract()
flight = response.css('.fdabf-td3::text').extract()
yield {'time': time1, 'flug': flight}
然后,在我的设置.py我有以下几点:
# -*- coding: utf-8 -*-
# Scrapy settings for huxyscrapper project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
# https://docs.scrapy.org/en/latest/topics/settings.html
# https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
# https://docs.scrapy.org/en/latest/topics/spider-middleware.html
BOT_NAME = 'huxyscrapper'
SPIDER_MODULES = ['huxyscrapper.spiders']
# NEWSPIDER_MODULE = 'huxyscrapper.spiders'
# Crawl responsibly by identifying yourself (and your website) on the user-agent
USER_AGENT = 'Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)'
# Obey robots.txt rules
ROBOTSTXT_OBEY = False
PROXY_POOL_ENABLED = 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://docs.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
# DOWNLOAD_DELAY = 3
# 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://docs.scrapy.org/en/latest/topics/spider-middleware.html
# SPIDER_MIDDLEWARES = {
# 'huxyscrapper.middlewares.HuxyscrapperSpiderMiddleware': 543,
# }
# DOWNLOADER_MIDDLEWARES = {
# # ...
# 'scrapy_proxy_pool.middlewares.ProxyPoolMiddleware': 610,
# 'scrapy_proxy_pool.middlewares.BanDetectionMiddleware': 620,
# # ...
# }
DOWNLOADER_MIDDLEWARES = {
'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware': None,
'scrapy_user_agents.middlewares.RandomUserAgentMiddleware': 400,
}
# Enable or disable downloader middlewares
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
# DOWNLOADER_MIDDLEWARES = {
# 'huxyscrapper.middlewares.HuxyscrapperDownloaderMiddleware': 543,
# }
# Enable or disable extensions
# See https://docs.scrapy.org/en/latest/topics/extensions.html
# EXTENSIONS = {
# 'scrapy.extensions.telnet.TelnetConsole': None,
# }
# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {
'huxyscrapper.pipelines.HuxyscrapperPipeline': 300,
}
# Enable and configure the AutoThrottle extension (disabled by default)
# See https://docs.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://docs.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'
所以,当我运行应用程序时,这是我得到的最后一个字典:
那么,我做错了什么?你知道吗
你想爬网this而不是this,因为它从that one加载数据,所以你得到空列表,因为你想要的数据在that page中不存在。你知道吗
在创建spider之前,最好通过
scrapy shell
逐view(response)
查看网站,以了解您在request
时得到了什么。你知道吗相关问题 更多 >
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