Question

我正在运行下面的蜘蛛，但它没有进入解析方法，我不知道为什么，有人请帮忙。

我的代码在

下面

    from scrapy.item import Item, Field
    from scrapy.selector import Selector
    from scrapy.spider import BaseSpider
    from scrapy.selector import HtmlXPathSelector


    class MyItem(Item):
        reviewer_ranking = Field()
        print "asdadsa"


    class MySpider(BaseSpider):
        name = 'myspider'
        allowed_domains = ["amazon.com"]
        start_urls = ["http://www.amazon.com/gp/pdp/profile/A28XDLTGHPIWE1/ref=cm_cr_pr_pdp"]
        print"sadasds"
        def parse(self, response):
            print"fggfggftgtr"
            sel = Selector(response)
            hxs = HtmlXPathSelector(response)
            item = MyItem()
            item["reviewer_ranking"] = hxs.select('//span[@class="a-size-small a-color-secondary"]/text()').extract()
            return item

我得到的输出如下

    $ scrapy runspider crawler_reviewers_data.py
    asdadsa
    sadasds
    /home/raj/Documents/IIM A/Daily sales rank/Daily      reviews/Reviews_scripts/Scripts_review/Reviews/Reviewer/crawler_reviewers_data.py:18:     ScrapyDeprecationWarning: crawler_reviewers_data.MySpider inherits from deprecated class scrapy.spider.BaseSpider, please inherit from scrapy.spider.Spider. (warning only on first subclass, there may be others)
    class MySpider(BaseSpider):
    2014-06-24 19:21:35+0530 [scrapy] INFO: Scrapy 0.22.2 started (bot: scrapybot)
    2014-06-24 19:21:35+0530 [scrapy] INFO: Optional features available: ssl, http11
    2014-06-24 19:21:35+0530 [scrapy] INFO: Overridden settings: {}
    2014-06-24 19:21:35+0530 [scrapy] INFO: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState
    2014-06-24 19:21:35+0530 [scrapy] INFO: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, HttpProxyMiddleware, ChunkedTransferMiddleware, DownloaderStats
    2014-06-24 19:21:35+0530 [scrapy] INFO: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
    2014-06-24 19:21:35+0530 [scrapy] INFO: Enabled item pipelines: 
    2014-06-24 19:21:35+0530 [myspider] INFO: Spider opened
    2014-06-24 19:21:35+0530 [myspider] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
    2014-06-24 19:21:35+0530 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6027
    2014-06-24 19:21:35+0530 [scrapy] DEBUG: Web service listening on 0.0.0.0:6084
    2014-06-24 19:21:36+0530 [myspider] DEBUG: Crawled (403) <GET     http://www.amazon.com/gp/pdp/profile/A28XDLTGHPIWE1/ref=cm_cr_pr_pdp> (referer: None) ['partial']
    2014-06-24 19:21:36+0530 [myspider] INFO: Closing spider (finished)
    2014-06-24 19:21:36+0530 [myspider] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 259,
 'downloader/request_count': 1,
 'downloader/request_method_count/GET': 1,
 'downloader/response_bytes': 28487,
 'downloader/response_count': 1,
 'downloader/response_status_count/403': 1,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2014, 6, 24, 13, 51, 36, 631236),
 'log_count/DEBUG': 3,
 'log_count/INFO': 7,
 'response_received_count': 1,
 'scheduler/dequeued': 1,
 'scheduler/dequeued/memory': 1,
 'scheduler/enqueued': 1,
 'scheduler/enqueued/memory': 1,
 'start_time': datetime.datetime(2014, 6, 24, 13, 51, 35, 472849)}
    2014-06-24 19:21:36+0530 [myspider] INFO: Spider closed (finished)

请帮助我，我在这一点上陷入困境。

Answer 1

这是Amazon使用的反网络抓取技术 - 您获得了403 - Forbidden，因为它需要随请求一起发送User-Agent标头。

一种选择是手动将其添加到Request产生的start_requests()：

class MySpider(BaseSpider):
    name = 'myspider'
    allowed_domains = ["amazon.com"]

    def start_requests(self):
        yield Request("https://www.amazon.com/gp/pdp/profile/A28XDLTGHPIWE1/ref=cm_cr_pr_pdp",
                      headers={'User-Agent': "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1"})

    ...

另一种选择是在项目范围内设置DEFAULT_REQUEST_HEADERS设置。

另请注意，Amazon提供的API有python wrapper，请考虑使用它。

希望有所帮助。

Scrapy没有进入解析功能

1 个答案: