Question

我正在搜索汽车列表页面上有一些javascript的二手车经销商网站，因此使用了scrapy-splash。

汽车经销商网页也有无限滚动，直到所有汽车都列出来。

我遇到的问题是，在某些情况下，下面的代码不会让无限滚动继续到最后 - 我不知道为什么 - 所以我想念一些车。

我已将设置文件中的并发请求缩减回1，因此我知道至少我开始废弃start_url页面上的所有汽车经销商。

我缺少的任何想法？

设置文件代码：

Q == True

Scrapy Code：

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

# Scrapy settings for autotrader1 project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     http://doc.scrapy.org/en/latest/topics/settings.html
#     http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html
#     http://scrapy.readthedocs.org/en/latest/topics/spider-middleware.html

BOT_NAME = 'autotrader1'

SPIDER_MODULES = ['autotrader1.spiders']
NEWSPIDER_MODULE = 'autotrader1.spiders'

SPLASH_URL = 'http://192.168.99.100:8050/'

# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'autotrader1 (+http://www.yourdomain.com)'

# Obey robots.txt rules
ROBOTSTXT_OBEY = True

# Configure maximum concurrent requests performed by Scrapy (default: 16)
CONCURRENT_REQUESTS = 1

# Configure a delay for requests for the same website (default: 0)
# See http://scrapy.readthedocs.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 http://scrapy.readthedocs.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
#    'autotrader1.middlewares.Autotrader1SpiderMiddleware': 543,
#}

SPIDER_MIDDLEWARES = {
    'scrapy_splash.SplashDeduplicateArgsMiddleware': 100,
}

# Enable or disable downloader middlewares
# See http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
#    'autotrader1.middlewares.MyCustomDownloaderMiddleware': 543,
#}
DOWNLOADER_MIDDLEWARES = {
    'scrapy_splash.SplashCookiesMiddleware': 723,
    'scrapy_splash.SplashMiddleware': 725,
    'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware': 810,
}


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

# Configure item pipelines
# See http://scrapy.readthedocs.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {'autotrader1.pipelines.CSVPipeline': 300 }

# Enable and configure the AutoThrottle extension (disabled by default)
# See http://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 http://scrapy.readthedocs.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'
HTTPCACHE_STORAGE = 'scrapy_splash.SplashAwareFSCacheStorage'

DUPEFILTER_CLASS = 'scrapy_splash.SplashAwareDupeFilter'

Answer 1

您需要将端点中的render.html更改为execute。请参阅第三个示例here

在你的情况下

yield SplashRequest(url_dealer, self.parse_second, endpoint='execute', args={'wait':2, 'lua_source': script})

Scrapy-splash不允许无限滚动完成

1 个答案: