[英]python - scrapy doesn't follow links
I'm trying to parse site with Scrapy. 我正在尝试使用Scrapy解析网站。 The urls I need to parse formed like this http://example.com/productID/1234/ . 我需要解析的网址是这样的http://example.com/productID/1234/ 。 This links can be found on pages with address like: http://example.com/categoryID/1234/ . 可以在以下地址的页面上找到此链接: http : //example.com/categoryID/1234/ 。 The thing is that my crawler fetches first categoryID page (http://www.example.com/categoryID/79/, as you can see from trace below), but nothing more. 问题是我的搜寻器获取了第一个categoryID页面(http://www.example.com/categoryID/79/,正如您从下面的跟踪中看到的),但仅此而已。 What am I doing wrong? 我究竟做错了什么? Thank you. 谢谢。
Here is my Scrapy code: 这是我的Scrapy代码:
# -*- coding: UTF-8 -*-
#THIRD-PARTY MODULES
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.selector import HtmlXPathSelector
class ExampleComSpider(CrawlSpider):
name = "example.com"
allowed_domains = ["http://www.example.com/"]
start_urls = [
"http://www.example.com/"
]
rules = (
# Extract links matching 'categoryID/xxx'
# and follow links from them (since no callback means follow=True by default).
Rule(SgmlLinkExtractor(allow=('/categoryID/(\d*)/', ), )),
# Extract links matching 'productID/xxx' and parse them with the spider's method parse_item
Rule(SgmlLinkExtractor(allow=('/productID/(\d*)/', )), callback='parse_item'),
)
def parse_item(self, response):
self.log('Hi, this is an item page! %s' % response.url)
Here is a trace of Scrapy: 这是Scrapy的痕迹:
2012-01-31 12:38:56+0000 [scrapy] INFO: Scrapy 0.14.1 started (bot: parsers)
2012-01-31 12:38:57+0000 [scrapy] DEBUG: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, MemoryUsage, SpiderState
2012-01-31 12:38:57+0000 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, RedirectMiddleware, CookiesMiddleware, HttpCompressionMiddleware, ChunkedTransferMiddleware, DownloaderStats
2012-01-31 12:38:57+0000 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2012-01-31 12:38:57+0000 [scrapy] DEBUG: Enabled item pipelines:
2012-01-31 12:38:57+0000 [example.com] INFO: Spider opened
2012-01-31 12:38:57+0000 [example.com] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2012-01-31 12:38:57+0000 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6023
2012-01-31 12:38:57+0000 [scrapy] DEBUG: Web service listening on 0.0.0.0:6080
2012-01-31 12:38:58+0000 [example.com] DEBUG: Crawled (200) <GET http://www.example.com/> (referer: None)
2012-01-31 12:38:58+0000 [example.com] DEBUG: Filtered offsite request to 'www.example.com': <GET http://www.example.com/categoryID/79/>
2012-01-31 12:38:58+0000 [example.com] INFO: Closing spider (finished)
2012-01-31 12:38:58+0000 [example.com] INFO: Dumping spider stats:
{'downloader/request_bytes': 199,
'downloader/request_count': 1,
'downloader/request_method_count/GET': 1,
'downloader/response_bytes': 121288,
'downloader/response_count': 1,
'downloader/response_status_count/200': 1,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2012, 1, 31, 12, 38, 58, 409806),
'request_depth_max': 1,
'scheduler/memory_enqueued': 1,
'start_time': datetime.datetime(2012, 1, 31, 12, 38, 57, 127805)}
2012-01-31 12:38:58+0000 [example.com] INFO: Spider closed (finished)
2012-01-31 12:38:58+0000 [scrapy] INFO: Dumping global stats:
{'memusage/max': 26992640, 'memusage/startup': 26992640}
It can be a difference between "www.example.com" and "example.com". “ www.example.com”和“ example.com”之间可能有所不同。 If it helps, you can use them both this way 如果有帮助,您可以同时使用它们
allowed_domains = ["www.example.com", "example.com"]
Replace: 更换:
allowed_domains = ["http://www.example.com/"]
with: 有:
allowed_domains = ["example.com"]
That should do the trick. 这应该够了吧。
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