Question

我继续从www.caribbeanjobs.com重定向。我已编程我的蜘蛛不服从robot.txt，禁用cookie，尝试meta = dont_redirect。我还能做什么？

这是我的蜘蛛：

import scrapy

from tutorial.items import CaribbeanJobsItem

class CaribbeanJobsSpider(scrapy.Spider):
        name = "caribbeanjobs"
        allowed_domains = ["caribbeanjobs.com/"]
        start_urls = [
        "http://www.caribbeanjobs.com/"
        ]
        def start_requests(self):
            for url in self.start_urls:
                yield scrapy.Request(url, meta={'dont_redirect':True})

        def parse(self, response):
                if ".com" in response.url:
                        from scrapy.shell import inspect_response
                        inspect_response(response, self)

这些是我的设置：

BOT_NAME = 'tutorial'

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


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

# Obey robots.txt rules
ROBOTSTXT_OBEY = False

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

# 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 = {
#    'tutorial.middlewares.MyCustomSpiderMiddleware': 543,
#}

# Enable or disable downloader middlewares
# See http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
#    'tutorial.middlewares.MyCustomDownloaderMiddleware': 543,
#}

# 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 = {
#    'tutorial.pipelines.SomePipeline': 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'

Answer 1

您是否尝试在设置中设置明确的USER_AGENT？

http://doc.scrapy.org/en/latest/topics/settings.html#user-agent

这样的事情可以作为一个起点：

USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.102 Safari/537.36"`

Answer 2

您可以指定handle_http_status。您可以在start_urls之后初始化此列表。

handle_http_status = ['303', '301']

Answer 3

使用自定义下载中间件来处理此类重定向：

'DOWNLOADER_MIDDLEWARES' : {
    'projectname.middlewares.RandomProxyForReDirectedUrls': 650
}

在projectname \ middlewares.py中添加一个新类：

class RandomProxyForReDirectedUrls(object):
    def process_response(self, request, response, spider):
        if response.status in [303, 301]:
            if "_some_wrongly_redirected_url_identifier_" in response.url:
                request = request.replace(url=request.meta['redirect_urls'][0])
                request.dont_filter = True
                logging.error("Redirecting back to original url: %s" % request.meta['redirect_urls'][0])
                return request
            else:
                return response

如果满足条件，它将重定向到原始链接，否则继续正常运行。

网站强制scrapy重定向

3 个答案: