Scrapy - 不抓取

Question

我試圖得到一個遞歸爬網運行，因爲我寫的一個工作不正常，我從網上拉了一個例子，並嘗試。我真的不知道，問題出在哪裏，但抓取不會顯示任何錯誤。誰能幫我這個。

另外，是否有任何分步調試工具來幫助理解蜘蛛的抓取流程。

任何有關這方面的幫助，非常感謝。

MacBook:spiders hadoop$ scrapy crawl craigs -o items.csv -t csv 
/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/zope/__init__.py:1: UserWarning: Module pkg_resources was already imported from /System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/pkg_resources.pyc, but /Library/Python/2.6/site-packages is being added to sys.path__import__('pkg_resources').declare_namespace(__name__) 
/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/zope/__init__.py:1: UserWarning: Module site was already imported from /System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site.pyc, but /Library/Python/2.6/site-packages is being added to sys.path__import__('pkg_resources').declare_namespace(__name__) 
2013-02-08 20:35:55+0530 [scrapy] INFO: Scrapy 0.16.4 started (bot: myspider) 
2013-02-08 20:35:55+0530 [scrapy] DEBUG: Enabled extensions: FeedExporter, LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState 
2013-02-08 20:35:55+0530 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, RedirectMiddleware, CookiesMiddleware, HttpCompressionMiddleware, ChunkedTransferMiddleware, DownloaderStats 
2013-02-08 20:35:55+0530 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware 
2013-02-08 20:35:55+0530 [scrapy] DEBUG: Enabled item pipelines: 
2013-02-08 20:35:55+0530 [craigs] INFO: Spider opened 
2013-02-08 20:35:55+0530 [craigs] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 
2013-02-08 20:35:55+0530 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6023 
2013-02-08 20:35:55+0530 [scrapy] DEBUG: Web service listening on 0.0.0.0:6080 
2013-02-08 20:35:58+0530 [craigs] DEBUG: Crawled (200) <GET http://sfbay.craigslist.org/npo/> (referer: None) 
2013-02-08 20:35:58+0530 [craigs] INFO: Closing spider (finished) 
2013-02-08 20:35:58+0530 [craigs] INFO: Dumping Scrapy stats: 
    {'downloader/request_bytes': 230, 
    'downloader/request_count': 1, 
'downloader/request_method_count/GET': 1, 
'downloader/response_bytes': 7291, 
'downloader/response_count': 1, 
'downloader/response_status_count/200': 1, 
'finish_reason': 'finished', 
'finish_time': datetime.datetime(2013, 2, 8, 15, 5, 58, 415553), 
'log_count/DEBUG': 7, 
'log_count/INFO': 4, 
'response_received_count': 1, 
'scheduler/dequeued': 1, 
'scheduler/dequeued/memory': 1, 
'scheduler/enqueued': 1, 
'scheduler/enqueued/memory': 1, 
'start_time': datetime.datetime(2013, 2, 8, 15, 5, 55, 343482)} 
2013-02-08 20:35:58+0530 [craigs] INFO: Spider closed (finished) 

我用的代碼如下，

from scrapy.contrib.spiders import CrawlSpider, Rule 
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor 
from scrapy.selector import HtmlXPathSelector 
#from craigslist_sample.items import CraigslistSampleItem 

class MySpider(CrawlSpider): 
    name = "craigs" 
    allowed_domains = ["sfbay.craigslist.org"] 
    start_urls = ["sfbay.craigslist.org/npo/"] 

    rules = (Rule (SgmlLinkExtractor(allow=("d00\.html",),restrict_xpaths=('//p[@id="nextpage"]',)) 
, callback="parse_items", follow= True), 
) 

    def parse_items(self, response): 
     hxs = HtmlXPathSelector(response) 
     titles = hxs.select("//p") 
     items = [] 
     for titles in titles: 
      item = CraigslistSampleItem() 
      item ["title"] = titles.select("a/text()").extract() 
      item ["link"] = titles.select("a/@href").extract() 
      items.append(item) 
     return(items) 

Answer 1

1. 替換修改您的SgmlLinkExtractor作爲payala建議
2. 刪除restrict_xpaths部分鏈接提取器

這些更改將解決所遇到的問題。我還會對用於選擇標題的xpath提出以下建議，因爲這會刪除將發生的空項目，因爲下一頁鏈接也將被選中。

def parse_items(self, response): 
    hxs = HtmlXPathSelector(response) 
    titles = hxs.select("//p[@class='row']") 

Answer 2

嘗試在你的SgmlLinkExtractor "d00\.html"與".*00\.html"或"index\d+00\.html"