ruby 抓取javaeye最热博客 rss

这个是通过抓取javaeye上的blog来学习rss。
我使用的是Simple-RSS来抓取。

Simple-RSS介绍：
Simple RSS is a simple, flexible, extensible, and liberal RSS and Atom reader for Ruby
gem install simple-rss

代码如下：

require 'rubygems'
require 'simple-rss' #gem install simple-rss
require 'open-uri'
require 'net/http'

##
#常量定义
FS_LEN = 80

#抓取javascript最火blog的rss,这里简单一点，做个示范
##
#获得blog名
def get_blogs_names()
  begin
    blog_url = "http://www.iteye.com/blogs"
    blog_html = Net::HTTP.get(URI.parse(blog_url))
    reg = /http:\/\/([a-zA-z]{4,}).iteye.com/
    match = blog_html.scan(reg)
  rescue Exception=>ex
    puts ex
    puts "blog exit"
    return  []
  end
  match.flatten
end

##
# 获得blog rss
def get_blog_rss(names)
  return if names.nil? or names.size.eql?(0)
  names.uniq!
  for name in names
    puts name + "*" * FS_LEN
    begin
      rss = SimpleRSS.parse open("http://#{name}.iteye.com/rss")
    rescue Exception=>ex
      puts ex
      puts "rss exit"
    end

    puts "-" * FS_LEN
    puts rss.channel.title
    puts rss.channel.link

    for item in rss.items
      puts "-"*50
      puts "title:" + item.title.to_s
      puts "description:" + item.description.to_s
      puts "link:" + item.link.to_s
      puts "pubDate:" + item.pubDate.to_s
      puts "guid:" + item.guid.to_s
      puts "category:" + item.category.to_s
    end
  end
end

##
#RUN
names =  get_blogs_names()
get_blog_rss(names)