Class: Atom::Entry

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
SimpleExtensions, Xml::Parseable
Defined in:
lib/atom.rb,
lib/atom/pub.rb

Overview

Represents an Entry as defined by the Atom Syndication Format specification.

An Entry represents an individual entry within a Feed.

Parsing

An Entry can be parsed using the Entry.load_entry method. This method accepts a String containing a valid atom entry document, an IO object, or an URI to a valid atom entry document. For example:

# Using a File
entry = Entry.load_entry(File.open("/path/to/myfeedentry.atom"))

# Using a URL
Entry = Entry.load_entry(URI.parse("http://example.org/afeedentry.atom"))

The document must contain a stand alone entry element as described in the Atom Syndication Format.

Encoding

A Entry can be converted to XML using, the to_xml method that returns a valid atom entry document in a String.

Attributes

An entry has the following attributes:

id

A unique id for the entry.

updated

The Time the entry was updated.

published

The Time the entry was published.

title

The title of the entry.

summary

A short textual summary of the item.

authors

An array of Atom::Person objects that are authors of this entry.

contributors

An array of Atom::Person objects that are contributors to this entry.

rights

A string describing the rights associated with this entry.

links

An array of Atom:Link objects. (This is actually an Atom::Links array which is an Array with some sugar).

source

Metadata of a feed that was the source of this item, for feed aggregators, etc.

categories

Array of Atom::Categories.

content

The content of the entry. This will be one of Atom::Content::Text, Atom::Content:Html or Atom::Content::Xhtml.

References

See also www.atomenabled.org/developers/syndication/atom-format-spec.php#element.entry for more detailed definitions of the attributes.

Instance Attribute Summary

Attributes included from SimpleExtensions

#simple_extensions

Instance Method Summary collapse

Methods included from SimpleExtensions

#[]

Methods included from Xml::Parseable

#==, #accessor_name, #current_node_is?, included, #next_node_is?, #parse, #to_xml

Constructor Details

#initialize(o = {}) {|_self| ... } ⇒ Entry

Initialize an Entry.

This will also yield itself, so an Entry can be constructed like this:

entry = Entry.new do |entry|
  entry.title = "My Cool entry"
end
o

An XML Reader or a Hash of attributes.

Yields:

  • (_self)

Yield Parameters:

  • _self (Atom::Entry) —

    the object that the method was called on



601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
 
# File 'lib/atom.rb', line 601

def initialize(o = {})
  @links = Links.new
  @authors = []
  @contributors = []
  @categories = []
  
  case o
  when XML::Reader
    if current_node_is?(o, 'entry', Atom::NAMESPACE) || next_node_is?(o, 'entry', Atom::NAMESPACE)
      o.read
      parse(o)
    else
      raise ArgumentError, "Entry created with node other than atom:entry: #{o.name}"
    end
  when Hash
    o.each do |k,v|
      send("#{k.to_s}=", v)
    end
  else
    raise ArgumentError, "Got #{o.class} but expected a Hash or XML::Reader"
  end

  yield(self) if block_given?
end

Instance Method Details

#destroy!(opts = {}) ⇒ Object 



214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
 
# File 'lib/atom/pub.rb', line 214

def destroy!(opts = {})
  if edit = edit_link
    uri = URI.parse(edit.href)
    response = nil
    Net::HTTP.start(uri.host, uri.port) do |http|
      request = Net::HTTP::Delete.new(uri.request_uri, {'Accept' => 'application/atom+xml', 'User-Agent' => "rAtom #{Atom::VERSION::STRING}"})
      if opts[:user] && opts[:pass]
        request.basic_auth(opts[:user], opts[:pass])
      elsif opts[:hmac_access_id] && opts[:hmac_secret_key]
        if Atom::Configuration.auth_hmac_enabled?
          AuthHMAC.sign!(request, opts[:hmac_access_id], opts[:hmac_secret_key])
        else
          raise ArgumentError, "AuthHMAC credentials provides by auth-hmac gem is not installed"
        end
      end
      
      response = http.request(request)
    end
    
    case response
    when Net::HTTPSuccess
    else
      raise Atom::Pub::ProtocolError, response
    end
  else
    raise Atom::Pub::NotSupported, "Entry does not have an edit link"
  end
end

#reload!(opts = {}) ⇒ Object

Reload the Entry by fetching the self link.



627
628
629
630
631
 
# File 'lib/atom.rb', line 627

def reload!(opts = {})
  if links.self
    Entry.load_entry(URI.parse(links.self.href), opts)
  end
end

#save!(opts = {}) ⇒ Object 



185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
 
# File 'lib/atom/pub.rb', line 185

def save!(opts = {})
  if edit = edit_link
    uri = URI.parse(edit.href)
    response = nil
    Net::HTTP.start(uri.host, uri.port) do |http|
      request = Net::HTTP::Put.new(uri.request_uri, headers)
      if opts[:user] && opts[:pass]
        request.basic_auth(opts[:user], opts[:pass])
      elsif opts[:hmac_access_id] && opts[:hmac_secret_key]
        if Atom::Configuration.auth_hmac_enabled?
          AuthHMAC.sign!(request, opts[:hmac_access_id], opts[:hmac_secret_key])
        else
          raise ArgumentError, "AuthHMAC credentials provides by auth-hmac gem is not installed"
        end
      end
      
      response = http.request(request, self.to_xml)
    end
    
    case response
    when Net::HTTPSuccess
    else
      raise Atom::Pub::ProtocolError, response
    end
  else
    raise Atom::Pub::NotSupported, "Entry does not have an edit link"
  end
end