python - Scrapy不抓取https？

Question

刚接触 scrapy，所以我可能只是做错了事情。然而，scrapy 似乎不会抓取我输入的任何 https 网站。

class SeleniumSpider(CrawlSpider):
    name = "SeleniumSpider"
    start_urls = ["https://www.facebook.com"]

    rules = (
        Rule(SgmlLinkExtractor(allow=('\.html', )), callback='parse_page',follow=True),
    )

    def __init__(self):
        CrawlSpider.__init__(self)
        
    def __del__(self):
        self.driver.stop()
        print self.verificationErrors
        CrawlSpider.__del__(self)

    def parse_page(self, response):
        hxs = HtmlXPathSelector(response)
        hxs.select('//div').extract()

输出:

2014-05-30 11:22:01-0400 [scrapy] INFO: Scrapy 0.22.2 started (bot: scrapybot)
2014-05-30 11:22:01-0400 [scrapy] INFO: Optional features available: ssl, http11
2014-05-30 11:22:01-0400 [scrapy] INFO: Overridden settings: {'DEFAULT_ITEM_CLASS': 'dirbot.items.Website', 'NEWSPIDER_MODULE': 'dirbot.spiders', 'SPIDER_MODULES': ['dirbot.spiders']}    
2014-05-30 11:22:01-0400 [scrapy] INFO: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState  
2014-05-30 11:22:01-0400 [scrapy] INFO: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats  
2014-05-30 11:22:01-0400 [scrapy] INFO: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2014-05-30 11:22:01-0400 [scrapy] INFO: Enabled item pipelines: FilterWordsPipeline
2014-05-30 11:22:01-0400 [SeleniumSpider] INFO: Spider opened
2014-05-30 11:22:01-0400 [SeleniumSpider] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2014-05-30 11:22:01-0400 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6023
2014-05-30 11:22:01-0400 [scrapy] DEBUG: Web service listening on 0.0.0.0:6080
2014-05-30 11:22:01-0400 [SeleniumSpider] DEBUG: Crawled (200) <GET https://www.facebook.com> (referer: None)
2014-05-30 11:22:01-0400 [SeleniumSpider] INFO: Closing spider (finished)
2014-05-30 11:22:01-0400 [SeleniumSpider] INFO: Dumping Scrapy stats:

有什么建议吗？爬网程序在 http://www.amazon.com 上运行良好以及其他

Answer 1

与https无关。问题是实际上没有包含 .html 的链接。

以下是测试方法:

class SeleniumSpider(CrawlSpider):
    name = "SeleniumSpider"
    start_urls = ["https://www.facebook.com"]

    def parse(self, response):
        hxs = Selector(response)
        print hxs.xpath('//a[contains(@href, "html")]').extract()

它将输出一个空列表。

您应该真正使用facebook SDK for python，而不是抓取facebook html页面。或pyfacebook ，更加方便、稳健。我很确定使用 scrapy 解析 facebook 页面一点也不有趣，因为在 facebook 上构建页面涉及到很多动态 javascript 逻辑、ajax 调用等。

UPD(提取所有链接的一般规则):

rules = (
    Rule(SgmlLinkExtractor(), callback='parse_page', follow=True),
)