Rails中如何构建rss feed输出
04月 18, 2008 on 9:02 am | In 未分类 |在网上Google了很多次,能找到用rails制作rss,但是总是找不到完整的。今天把完整的过程抄录在这里:
就是你自己把RSS XML的格式拼凑好,输出.并设置HTTP Header ，标记content-type为application/XML,常见的代码:
- #Post_controller::feed()
- def feed
- require "rss"
- articles = Article.find :all, :order => 'post_date DESC', :limit => 10
- feed = RSS::Maker.make("2.0") do |maker|
- maker.channel.title = "Gang of Technology"
- maker.channel.description = "Gang of Technology site"
- maker.channel.link = "http://up-u.com"
- maker.items.do_sort = true
- articles.each do |article|
- item = maker.items.new_item
- item.link = "http://www.162cm.com/archives/#{article.id}"
- item.title = article.title
- item.date = article.post_date
- item.description = ""
- end
- end
- send_data feed.to_s, :type => "application/rss+xml", :disposition =>
- 'inline'
- end
Rails Controller->Action 代码:
#Post_controller::feed
def feed
@posts=Post.find :all,:limit=>”id desc”
end
erb模板:
xml.instruct!
xml.rss(”version”=>”2.0″,
“xmlns:dc”=>”http://purl.org/dc/elements/1.1/”) do
xml.channel do
xml.title “renlu.xu ’s blog”
xml.link(url_for(:action=>”start”,:only_path=>false))
xml.description “My life My love”
xml.language “zh_CN”
xml.ttl 60
for event in @posts do
xml.item do
xml.title(event.title)
xml.description(event.body)
xml.pubDate(event.created_at.to_s(:rfc822))
xml.guid(event.id)
xml.link(”http://…..#{event.id}”)
end
end
end
end
这种方法 网上很多文章到这一步就算完了，没有下文了，其实不对。到这一步，访问http://localhost:3000/post/feed仍然是出来的html的界面。g之，找到介绍:rails 2.0会根据不同的格式对模板进行渲染。这段代码放在/views/post/feed.rhtml中是没有用的，需要放在/views/post/feed.atom.builder中，并且需要通过http://localhost:3000/post/feed/123.atom(这里123没有什么实际意义 随便抓的一个),或是http://localhost:3000/post/feed?format=atom才能正确地按rss+xml输出。
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