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    <p>CrawlSpider inherits BaseSpider. It just added rules to extract and follow links. If these rules are not enough flexible for you - use BaseSpider:</p> <pre><code>class USpider(BaseSpider): """my spider. """ start_urls = ['http://www.amazon.com/s/?url=search-alias%3Dapparel&amp;sort=relevance-fs-browse-rank'] allowed_domains = ['amazon.com'] def parse(self, response): '''Parse main category search page and extract subcategory search link.''' self.log('Downloaded category search page.', log.DEBUG) if response.meta['depth'] &gt; 5: self.log('Categories depth limit reached (recursive links?). Stopping further following.', log.WARNING) hxs = HtmlXPathSelector(response) subcategories = hxs.select("//div[@id='refinements']/*[starts-with(.,'Department')]/following-sibling::ul[1]/li/a[span[@class='refinementLink']]/@href").extract() for subcategory in subcategories: subcategorySearchLink = urlparse.urljoin(response.url, subcategorySearchLink) yield Request(subcategorySearchLink, callback = self.parseSubcategory) def parseSubcategory(self, response): '''Parse subcategory search page and extract item links.''' hxs = HtmlXPathSelector(response) for itemLink in hxs.select('//a[@class="title"]/@href').extract(): itemLink = urlparse.urljoin(response.url, itemLink) self.log('Requesting item page: ' + itemLink, log.DEBUG) yield Request(itemLink, callback = self.parseItem) try: nextPageLink = hxs.select("//a[@id='pagnNextLink']/@href").extract()[0] nextPageLink = urlparse.urljoin(response.url, nextPageLink) self.log('\nGoing to next search page: ' + nextPageLink + '\n', log.DEBUG) yield Request(nextPageLink, callback = self.parseSubcategory) except: self.log('Whole category parsed: ' + categoryPath, log.DEBUG) def parseItem(self, response): '''Parse item page and extract product info.''' hxs = HtmlXPathSelector(response) item = UItem() item['brand'] = self.extractText("//div[@class='buying']/span[1]/a[1]", hxs) item['title'] = self.extractText("//span[@id='btAsinTitle']", hxs) ... </code></pre> <p>Even if BaseSpider's start_urls are not enough flexible for you, override <a href="http://doc.scrapy.org/topics/spiders.html#scrapy.spider.BaseSpider.start_requests" rel="noreferrer">start_requests</a> method.</p>
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    1. COThanks so much! I didn't mention I'm crawling Amazon, so you gave and incredibly useful resource :D. Amazon has some URLs that contain a hash character, and Scrapy is stripping the URL from that hash sign to the end. Do you if there's a way to modify this behavior and keep the whole URL? T.I.A, appreciate your help.
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    2. COwhere is stripping? in request.url, xpath selector or?
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    3. COI create a new thread for this if you don't mind checking. http://stackoverflow.com/questions/6604690/scrapy-hash-tag-on-urls
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