前两天（好像?）看到大家在讨论feeds生成，工作累了，来写点文字，稍作休息一下:)
DHH写的，很小巧实用的代码
0: 前因
cclong 的
php?name=%CC%FB%D7%D3" onclick="tagshow(event)" class="t_tag">帖子：如何制作feed?
http://www.ruby-lang.org.cn/foru ... &extra=page%3D1
1：安装
ruby script/plugin install atom_feed_helper
2：使用
这个插件太简单的，没什么好说的，大家如果有什么问题请跟帖，一起讨论。(下面代码取之插件中的README). 大家一起来阅读一下代码
Controller file:posts_controller.rb
def index
@posts = Post.find(:all, :limit => 25)
respond_to do |format|
format.html
format.atom
end
end
View file:posts/index.atom
atom_feed(:url => formatted_people_url(:atom)) do |feed|
feed.title("Address book")
feed.updated(@people.first ? @people.first.created_at : Time.now.utc)
for post in @posts
feed.entry(post) do |entry|
entry.title(post.title)
entry.content(post.body, :type => 'html')
entry.author do |author|
author.name(post.creator.name)
author.email(post.creator.email_address)
end
end
end
end生成，这个也就是你想要的：
<?xml version="1.0" encoding="UTF-8"?>
<feed xml:lang="en-US" xmlns="http://www.w3.org/2005/Atom">
<id>tag:localhost:people</id>
<link type="application/atom+xml" rel="self" href="http://example.com/people.atom"/>
<title>Address book</title>
<updated></updated>
<entry>
<id>tag:localhost:3000,2007-05-18T16:35:00-07:00:Person1</id>
<published>2007-05-18T16:35:00-07:00</published>
<link type="text/html" rel="alternate" href="http://example.com/people/1" />
<title>The future is now</title>
<content type="html">Once upon a time</content>
<author>
<name>DHH</name>
<email>david@loudthinking.com</email>
</author>
</entry>
<entry>
<id>tag:localhost:3000,2007-05-18T09:36:00-07:00:Person2</id>
<published>2007-05-18T09:36:00-07:00</published>
<link type="text/html" rel="alternate" href="http://example.com/people/1" />
<title>Matz</title>
<content type="html">This is Matz</content>
<author>
<name>Matz</name>
<email>Matz</email>
</author>
</entry>
</feed>三：源码
/plugins/atom_feed_helper/lib/atom_feed_helper.rb
http://dev.rubyonrails.org/brows ... atom_feed_helper.rbmodule AtomFeedHelper
def atom_feed(options = {}, &block)
xml = options[:xml] || eval("xml", block.binding)
xml.instruct!
xml.feed "xml:lang" => "en-US", "xmlns" => 'http://www.w3.org/2005/Atom' do
xml.id("tag:#{request.host},2007:#{request.request_uri.split(".")[0].gsub("/", "")}")
if options[:root_url] || respond_to?(:root_url)
xml.link(:rel => 'alternate', :type => 'text/html', :href => options[:root_url] || root_url)
end
if options[:url]
xml.link(:rel => 'self', :type => 'application/atom+xml', :href => options[:url])
end
yield AtomFeedBuilder.new(xml, self)
end
end
protected
class AtomFeedBuilder
def initialize(xml, view)
@xml, @view = xml, view
end
def entry(record)
@xml.entry do
@xml.id("tag:#{@view.request.host_with_port},2007:#{record.class}#{record.id}")
@xml.published(record.created_at.xmlschema) if record.respond_to?(:created_at)
@xml.updated(record.updated_at.xmlschema) if record.respond_to?(:updated_at)
yield @xml
@xml.link(:rel => 'alternate', :type => 'text/html', :href => @view.polymorphic_url(record))
end
end
private
def method_missing(method, *arguments, &block)
@xml.__send__(method, *arguments, &block)
end
end
end
PS:
还有个叫Simple Rss,写的和大家写的没什么区别了，我就不推荐也不写了。
Any question? 有的请举手。为了提高大家的积极性，有奖励，o(∩_∩)o...
哈哈
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本帖最后由 martin 于 2007-9-3 16:53 编辑 ]
