空列表作为输出，同时使用scrapy删除html元素

Question

我试图从这个website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

然后，我使用User-Agent来绕过这些限制，但仍然想知道为什么在提取元素时会得到空列表

下面是我的Spider类：

class FlightDestinationSpider(scrapy.Spider):
    name = 'flights_destinations'
    start_urls = [
        "https:/xxxxxxxxxxxx"
    ]

    def parse(self, response):
        # flights = HuxyscraperItem()

        # 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my settings.py中，我有以下内容：

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

# Scrapy settings for huxyscraper 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 = 'huxyscraper'

SPIDER_MODULES = ['huxyscraper.spiders']
# NEWSPIDER_MODULE = 'huxyscraper.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 = {
#    'huxyscraper.middlewares.HuxyscraperSpiderMiddleware': 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 = {
#    'huxyscraper.middlewares.HuxyscraperDownloaderMiddleware': 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 = {
    'huxyscraper.pipelines.HuxyscraperPipeline': 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'

因此，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

Answer 1

您想要爬网this而不是this，因为它从that one加载数据，所以您会得到空列表，因为您想要的数据在that page中不存在

import scrapy
import json

class FlightDestinationSpider(scrapy.Spider):
    name = 'flights_destinations'
    start_urls = [
        "https://xxxxxxxxx.com"
    ]

    def parse(self, response):
        json_data = json.loads(response.body)
        for data in json_data['monitor']['departure']:
            time1 = data['scheduledatetime']
            flight = data['airline']
            yield {'time': time1, 'flug': flight}

在创建您的爬行器之前，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