使用 hpricot 构建 flashvar 数组

发布于 2024-11-02 15:00:57 字数 499 浏览 3 评论 0原文

我之前曾使用 hpricot 从某些 HTML 标签内的网站获取内容，但是我正在尝试构建此页面上找到的所有 flashvar 的数组 http://view-source:http://megavideo.com/?v=014U2YO9

require 'hpricot'
require 'open-uri'

flashvars = Array.new
doc = Hpricot(open("http://megavideo.com/?v=014U2YO9"))

for flashvars in (doc/"/param[@name='flashvars']") do
  flashvars << flashvar
end

我一直在尝试使用上面的代码片段，希望我在右边Tracks，有人可以进一步帮助我吗？

谢谢

原文

I have used hpricot before for grabing content from websites that are within some HTML tags however I am trying to build an array of all the flashvars found on this page http://view-source:http://megavideo.com/?v=014U2YO9

require 'hpricot'
require 'open-uri'

flashvars = Array.new
doc = Hpricot(open("http://megavideo.com/?v=014U2YO9"))

for flashvars in (doc/"/param[@name='flashvars']") do
  flashvars << flashvar
end

I have been trying with the above code snippet, hopefully I was on the right tracks, would anyone be able to help me further?

Thankyou

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黒涩兲箜 2024-11-09 15:00:58

您使用的语法表明您正在尝试从元素获取属性，但该页面上不存在此类标记。对于 flashvar 对象的属性有大量 JavaScript 赋值。假设这些就是您想要的，您不需要 Hpricot，只需要 JS 的正则表达式。这似乎有效：

require 'open-uri'
html = open("http://megavideo.com/?v=014U2YO9").read

flashvars = Hash[ html.scan( /flashvars\.(\w+)\s*=\s*["']?(.+?)["']?;/ ) ]

require 'pp' # Just for pretty output here
pp flashvars

#=> {"logintxt"=>"Login",
#=>  "registertxt"=>"Register",
#=>  "searchtxt"=>"Search videos",
#=>  "searchrestxt"=>"\"",
#=>  "useSystemFont"=>"0",
#=>  "size"=>"17",
#=>  "loginAct"=>"?c=login%26next%3Dv%253D014U2YO9",
#=>  "registerAct"=>"?c=signup",
#=>  "userAct"=>"?c=account",
#=>  "signoutAct"=>"javascript:signout()",
#=>  "myvideostxt"=>"My Videos",
#=>  "videosAct"=>"?c=myvideos",
#=>  "added"=>"2011-04-14",
#=>  "username"=>"beenerkeekee19952",
#=>  etc.

请注意，这会将所有值保留为 Ruby 中的字符串，甚至是 JavaScript 中的数字值。由于它去掉了 JavaScript 字符串的前导/尾随引号，结果是您无法区分 flashvars.foo = 42; 和 flashvars.bar = "42"; 。

You have used syntax indicating that you are trying to fetch attributes from <param> elements, but no such markup exists on that page. There are a plethora of JavaScript assignments to properties of a flashvar object. Assuming that these are what you want, you don't need Hpricot, just a regex for the JS. This seems to work:

require 'open-uri'
html = open("http://megavideo.com/?v=014U2YO9").read

flashvars = Hash[ html.scan( /flashvars\.(\w+)\s*=\s*["']?(.+?)["']?;/ ) ]

require 'pp' # Just for pretty output here
pp flashvars

#=> {"logintxt"=>"Login",
#=>  "registertxt"=>"Register",
#=>  "searchtxt"=>"Search videos",
#=>  "searchrestxt"=>"\"",
#=>  "useSystemFont"=>"0",
#=>  "size"=>"17",
#=>  "loginAct"=>"?c=login%26next%3Dv%253D014U2YO9",
#=>  "registerAct"=>"?c=signup",
#=>  "userAct"=>"?c=account",
#=>  "signoutAct"=>"javascript:signout()",
#=>  "myvideostxt"=>"My Videos",
#=>  "videosAct"=>"?c=myvideos",
#=>  "added"=>"2011-04-14",
#=>  "username"=>"beenerkeekee19952",
#=>  etc.

Note that this leaves all values as strings in Ruby, even values that were numbers in JavaScript. As it strips off leading/trailing quote marks for the JavaScript strings, the result is that you cannot discern flashvars.foo = 42; from flashvars.bar = "42";.

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