python scrapy抓取时302重定向的问题，pythonscrapy,我用scrapy框架写了

python scrapy抓取时302重定向的问题，pythonscrapy,我用scrapy框架写了

我用scrapy框架写了个简单的爬虫，爬取安居客上房源信息。最初能够正确爬下来，之后可能请求次数太多酒重定向到验证码页面，我试着加了headers和禁止了重定向中间件依旧无法访问。不知该如何解决
代码如下：

# -*- coding: utf-8 -*-from HouseRenting.user_agents import agentsfrom HouseRenting.items import HouserentingItemimport scrapyimport randomclass AnjukeSpider(scrapy.Spider):    name = 'anjuke'    allowed_domains = ['bj.zu.anjuke.com']    start_urls = ['http://bj.zu.anjuke.com/fangyuan/x2']    headers = {        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',        'Accept-Encoding': 'gzip, deflate, sdch',        'Accept-Language': 'en-US,en;q=0.8,zh-CN;q=0.6,zh;q=0.4',        'Connection': 'keep-alive',        'Host': 'bj.zu.anjuke.com',        'User-Agent': random.choice(agents)    }    def parse(self, response):        print response.body        for item in response.xpath('//div[contains(@class, "zu-itemmod")]'):            # title = response.xpath('div/h3/a/text()').extract_first()            link = item.xpath('div/h3/a/@href').extract_first()            yield scrapy.Request(url=link, headers=self.headers, callback=self.parse_detail)    def parse_detail(self, response):        def extract_with_xpath(query):            return response.xpath(query).extract_first().strip()        print response.url        yield {'rental': extract_with_xpath('//span[@class="f26"]/text()')}

下面是debug信息：

$ scrapy crawl anjuke2016-12-04 23:40:01 [scrapy] INFO: Scrapy 1.1.0 started (bot: HouseRenting)2016-12-04 23:40:01 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'HouseRenting.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['HouseRenting.spiders'], 'BOT_NAME': 'HouseRenting', 'AUTOTHROTTLE_ENABLED': True, 'DOWNLOAD_DELAY': 3}2016-12-04 23:40:01 [scrapy] INFO: Enabled extensions:['scrapy.extensions.logstats.LogStats', 'scrapy.extensions.telnet.TelnetConsole', 'scrapy.extensions.corestats.CoreStats', 'scrapy.extensions.throttle.AutoThrottle']2016-12-04 23:40:01 [scrapy] INFO: Enabled downloader middlewares:['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware', 'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware', 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware', 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware', 'scrapy.downloadermiddlewares.retry.RetryMiddleware', 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware', 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware', 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware', 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware', 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware', 'scrapy.downloadermiddlewares.chunked.ChunkedTransferMiddleware', 'scrapy.downloadermiddlewares.stats.DownloaderStats']2016-12-04 23:40:01 [scrapy] INFO: Enabled spider middlewares:['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware', 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware', 'scrapy.spidermiddlewares.referer.RefererMiddleware', 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware', 'scrapy.spidermiddlewares.depth.DepthMiddleware']2016-12-04 23:40:01 [scrapy] INFO: Enabled item pipelines:[]2016-12-04 23:40:01 [scrapy] INFO: Spider opened2016-12-04 23:40:01 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)2016-12-04 23:40:01 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:60252016-12-04 23:40:02 [scrapy] DEBUG: Crawled (200) <GET http://bj.zu.anjuke.com/robots.txt> (referer: None)2016-12-04 23:40:08 [scrapy] DEBUG: Redirecting (302) to <GET http://www.anjuke.com/captcha-verify/?callback=shield&history=aHR0cDovL2JqLnp1LmFuanVrZS5jb20vZmFuZ3l1YW4veDI%3D> from <GET http://bj.zu.anjuke.com/fangyuan/x2>2016-12-04 23:40:09 [scrapy] DEBUG: Crawled (200) <GET http://www.anjuke.com/robots.txt> (referer: None)2016-12-04 23:40:12 [scrapy] DEBUG: Crawled (200) <GET http://www.anjuke.com/captcha-verify/?callback=shield&history=aHR0cDovL2JqLnp1LmFuanVrZS5jb20vZmFuZ3l1YW4veDI%3D> (referer: None)2016-12-04 23:40:12 [scrapy] INFO: Closing spider (finished)2016-12-04 23:40:12 [scrapy] INFO: Dumping Scrapy stats:{'downloader/request_bytes': 1367, 'downloader/request_count': 4, 'downloader/request_method_count/GET': 4, 'downloader/response_bytes': 15276, 'downloader/response_count': 4, 'downloader/response_status_count/200': 3, 'downloader/response_status_count/302': 1, 'finish_reason': 'finished', 'finish_time': datetime.datetime(2016, 12, 4, 15, 40, 12, 583814), 'log_count/DEBUG': 5, 'log_count/INFO': 7, 'response_received_count': 3, 'scheduler/dequeued': 2, 'scheduler/dequeued/memory': 2, 'scheduler/enqueued': 2, 'scheduler/enqueued/memory': 2, 'start_time': datetime.datetime(2016, 12, 4, 15, 40, 1, 924582)}2016-12-04 23:40:12 [scrapy] INFO: Spider closed (finished

我用浏览器能正常访问，不会跳转到验证码页面，不知该如何模拟真实浏览器的请求

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