{"id":204457,"date":"2025-05-29T08:56:21","date_gmt":"2025-05-29T00:56:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204457\/"},"modified":"2025-05-29T08:56:21","modified_gmt":"2025-05-29T00:56:21","slug":"scrapy-%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-meta-%e5%b0%86%e5%88%97%e8%a1%a8%e9%a1%b5%e5%92%8c%e8%af%a6%e6%83%85%e9%a1%b5%e5%86%85%e5%ae%b9%e5%ad%98%e5%82%a8%e5%9c%a8%e4%b8%80%e4%b8%aa-item","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204457\/","title":{"rendered":"Scrapy \u4e2d\u5982\u4f55\u4f7f\u7528 meta \u5c06\u5217\u8868\u9875\u548c\u8be6\u60c5\u9875\u5185\u5bb9\u5b58\u50a8\u5728\u4e00\u4e2a item \u4e2d\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Scrapy \u4e2d\u5982\u4f55\u4f7f\u7528 meta \u5c06\u5217\u8868\u9875\u548c\u8be6\u60c5\u9875\u5185\u5bb9\u5b58\u50a8\u5728\u4e00\u4e2a item \u4e2d\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u6587\u7ae0<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

<\/p>\n

\u5982\u4f55\u4f7f\u7528 meta \u5c06\u5217\u8868\u9875\u548c\u8be6\u60c5\u9875\u7684\u5185\u5bb9\u5b58\u50a8\u5728\u540c\u4e00\u4e2a item \u4e2d<\/strong><\/p>\n

\u5728 scrapy \u4e2d\uff0citem \u662f\u7528\u6765\u5b58\u50a8\u4ece\u7f51\u9875\u4e2d\u63d0\u53d6\u7684\u6570\u636e\u7ed3\u6784\u3002\u6709\u65f6\uff0c\u9700\u8981\u5c06\u6765\u81ea\u4e0d\u540c\u7f51\u9875\u7684\u591a\u4e2a\u6570\u636e\u7247\u6bb5\u7ec4\u5408\u5230\u4e00\u4e2a item \u4e2d\u3002\u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528 meta \u53c2\u6570\u5c06\u5217\u8868\u9875\u548c\u8be6\u60c5\u9875\u4e2d\u7684\u5185\u5bb9\u5b58\u50a8\u5728\u540c\u4e00\u4e2a item \u4e2d\u3002<\/p>\n

\u5728\u63d0\u4f9b\u7684\u793a\u4f8b\u4e2d\uff0c\u901a\u8fc7\u8c03\u7528 scrapy.request \u7684 meta \u53c2\u6570\uff0c\u53ef\u4ee5\u5c06\u5217\u8868\u9875\u63d0\u53d6\u5230\u7684\u6570\u636e\u4f20\u9012\u5230\u8be6\u60c5\u9875\u7684\u89e3\u6790\u51fd\u6570\u4e2d\u3002<\/p>\n

\u4fee\u6539\u540e\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

def parse(self, response):\n    \"\"\"\u83b7\u53d6\u5217\u8868\u9875\u6807\u9898\u3001\u65f6\u95f4\u3001URL\"\"\"\n    item = {}\n    item['title'] = response.css('title').extract_first()\n    item['time'] = response.css('.time').extract_first()\n    item['url'] = response.url\n\n    # \u5c06\u5217\u8868\u9875\u6570\u636e\u4f5c\u4e3a\u5143\u6570\u636e\u4f20\u9012\u7ed9\u8be6\u60c5\u9875\u89e3\u6790\u5668\n    yield scrapy.Request(item['url'], meta={'item': item}, callback=self.parse_item)\n\ndef parse_item(self, response):\n    \"\"\"\u83b7\u53d6\u8be6\u60c5\u9875\u5185\u5bb9\"\"\"\n    item = response.meta['item']  # \u63a5\u6536\u4ece\u5217\u8868\u9875\u4f20\u9012\u7684\u5143\u6570\u636e\n    item['content'] = response.css('.content').extract_first()\n\n    yield item<\/pre>\n
\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5728\u8be6\u60c5\u9875\u89e3\u6790\u51fd\u6570\u4e2d\u8bbf\u95ee\u5e76\u4fee\u6539\u5217\u8868\u9875\u5df2\u63d0\u53d6\u7684\u6570\u636e\uff0c\u4ece\u800c\u5c06\u6765\u81ea\u4e0d\u540c\u9875\u9762\u7684\u6240\u6709\u6570\u636e\u5b58\u50a8\u5728\u4e00\u4e2a item \u4e2d\u3002<\/p>\n
\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"
Scrapy \u4e2d\u5982\u4f55\u4f7f\u7528 met...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204457","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204457","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204457"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204457\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}