使用 Nokogiri 解析大型 HTML 文件 [英] Parsing large HTML files with Nokogiri
问题描述
我正在尝试解析 http://www.pro-medic.ru/index.php?ht=246&perpage=all 与 Nokogiri,但不幸的是我无法从页面中获取所有项目.
I'm trying to parse http://www.pro-medic.ru/index.php?ht=246&perpage=all with Nokogiri, but unfortunately I can't get all items from the page.
我的简单测试代码是:
require 'open-uri'
require 'nokogiri'
html = Nokogiri::HTML open('http://www.pro-medic.ru/index.php?ht=246&perpage=all')
p html.css('ul.products-grid-compact li .goods_container').count
它只返回 83 个项目,但实际计数约为 186 个.
It returns only 83 items but the real count is about 186.
我认为问题可能出在 open
上,但该函数似乎正确读取了 HTML 页面.
I thought that the problem could be in open
, but it seems that function reads the HTML page correctly.
有人遇到过同样的问题吗?
Has anybody faced the same problem?
推荐答案
该文件似乎超出了 Nokogiri 的解析器限制.您可以通过添加 HUGE<来放宽限制/code>
标志:
The file seems to exceed Nokogiri's parser limits. You can relax the limits by adding the HUGE
flag:
require 'open-uri'
require 'nokogiri'
url = 'http://www.pro-medic.ru/index.php?ht=246&perpage=all'
html = Nokogiri::HTML(open(url)) do |config|
config.options |= Nokogiri::XML::ParseOptions::HUGE
end
html.css('ul.products-grid-compact li .goods_container').count
#=> 186
注意|=
是一个按位或赋值运算符,不要和逻辑运算符||=
Note that |=
is a bitwise OR assignment operator, don't confuse it with the logical operator ||=
根据解析选项,您也可以通过config.huge
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