Class: Scribd::Document

Inherits:
Resource show all
Defined in:
lib/scribddoc.rb

Overview

A document as shown on the Scribd website. API programs can upload documents from files or URL’s, tag them, and change their settings. An API program can access any document, but it can only modify documents owned by the logged-in user.

To upload a new document to Scribd, you must create a new Document instance, set the file attribute to the file’s path, and then save the document:

doc = Scribd::Document.new
doc.file = '/path/or/URL/of/file.txt'
doc.save

You can do this more simply with one line of code:

doc = Scribd::Document.create :file => '/path/or/URL/of/file.txt'

If you are uploading a file that does not have an extension (like “.txt”), you need to specify the type attribute as well:

doc = Scribd::Document.upload :file => 'CHANGELOG', :type => 'txt'

Aside from these two attributes, you can set other attributes that affect how the file is displayed on Scribd. See the API documentation online for a list of attributes, at www.scribd.com/publisher/api?method_name=docs.search (consult the “Result explanation” section).

These attributes can be accessed or changed directly (doc.title = 'Title'). You must save a document after changing its attributes in order for those changes to take effect. Not all attributes can be modified; see the API documentation online for details.

A document can be associated with a Scribd::User via the owner attribute. This is not always the case, however. Documents retrieved from the find method will not be associated with their owners.

The owner attribute is read/write, however, changes made to it only apply before the document is saved. Once it is saved, the owner is set in stone and cannot be modified:

doc = Scribd::Document.new :file => 'test.txt'
doc.user = Scribd::User.(:username => 'newuser', :password => 'newpass', :email => '[email protected]')
doc.save #=> Uploads the document as "newuser", regardless of who the Scribd API user is
doc.user = Scribd::API.instance.user #=> raises NotImplementedError

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Resource

create, #created?, #inspect, #method_missing, #read_attribute, #read_attributes, #saved?, #write_attributes

Constructor Details

#initialize(options = {}) ⇒ Document

Creates a new, unsaved document with the given attributes. The document must be saved before it will appear on the website.



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# File 'lib/scribddoc.rb', line 55

def initialize(options={})
  super
  @download_urls = Hash.new
  if options[:xml] then
    load_attributes(options[:xml])
    @attributes[:owner] = options[:owner]
    @saved = true
    @created = true
  else
    @attributes = options
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Scribd::Resource

Class Method Details

.find(scope, options = {}) ⇒ Object

Finding by query

This method is called with a scope and a hash of options to documents by their content. You must at a minimum supply a query option, with a string that will become the full-text search query. For a list of other supported options, please see the online API documentation at www.scribd.com/publisher/api?method_name=docs.search

The scope can be any value given for the scope parameter in the above website, or :first to return the first result only (not an array of results).

The num_results option has been aliased as limit, and the num_start option has been aliased as offset.

Documents returned from this method will have their owner attributes set to nil.

Scribd::Document.find(:all, :query => 'cats and dogs', :limit => 10)

Finding by ID

Passing in simply a numerical ID loads the document with that ID. You can pass additional options as defined at httpwww.scribd.com/publisher/api?method_name=docs.getSettings

Scribd::Document.find(108196)

For now only documents that belong to the current user can be accessed in this manner.

Raises:

  • (ArgumentError) 


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# File 'lib/scribddoc.rb', line 209

def self.find(scope, options={})
  doc_id = scope if scope.kind_of?(Integer)
  raise ArgumentError, "You must specify a query or document ID" unless options[:query] or doc_id
  
  if doc_id then
    options[:doc_id] = doc_id
    response = API.instance.send_request('docs.getSettings', options)
    return Document.new(:xml => response.elements['/rsp'])
  else
    options[:scope] = scope == :first ? 'all' : scope.to_s
    options[:num_results] = options[:limit]
    options[:num_start] = options[:offset]
    response = API.instance.send_request('docs.search', options)
    documents = []
    response.elements['/rsp/result_set'].elements.each do |doc|
      documents << Document.new(:xml => doc)
    end
    return scope == :first ? documents.first : documents
  end
end

.update_all(docs, options) ⇒ Object

Quickly updates an array of documents with the given attributes. The documents can have different owners, but all of them must be modifiable.

Raises:

  • (ArgumentError) 


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# File 'lib/scribddoc.rb', line 168

def self.update_all(docs, options)
  raise ArgumentError, "docs must be an array" unless docs.kind_of? Array
  raise ArgumentError, "docs must consist of Scribd::Document objects" unless docs.all? { |doc| doc.kind_of? Document }
  raise ArgumentError, "You can't modify one or more documents" if docs.any? { |doc| doc.owner.nil? }
  raise ArgumentError, "options must be a hash" unless options.kind_of? Hash
  
  docs_by_user = docs.inject(Hash.new { |hash, key| hash[key] = Array.new }) { |hash, doc| hash[doc.owner] << doc; hash }
  docs_by_user.each { |user, doc_list| API.instance.send_request 'docs.changeSettings', options.merge(:doc_ids => doc_list.collect(&:id).join(','), :session_key => user.session_key) }
end

Instance Method Details

#conversion_status ⇒ Object

Returns the conversion status of this document. When a document is uploaded it must be converted before it can be used. The conversion is non-blocking; you can query this method to determine whether the document is ready to be displayed.

The conversion status is returned as a string. For a full list of conversion statuses, see the online API documentation at www.scribd.com/publisher/api?method_name=docs.getConversionStatus

Unlike other properties of a document, this is retrieved from the server every time it’s queried.



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# File 'lib/scribddoc.rb', line 246

def conversion_status
  response = API.instance.send_request('docs.getConversionStatus', :doc_id => self.id)
  response.elements['/rsp/conversion_status'].text
end

#destroy ⇒ Object

Deletes a document. Returns true if successful.



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# File 'lib/scribddoc.rb', line 253

def destroy
  response = API.instance.send_request('docs.delete', :doc_id => self.id)
  return response.elements['/rsp'].attributes['stat'] == 'ok'
end

#download_url(format = 'original') ⇒ Object

Retrieves a document’s download URL. You can provide a format for the download. Valid formats are listed at www.scribd.com/publisher/api?method_name=docs.getDownloadUrl

If you do not provide a format, the link will be for the document’s original format.



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# File 'lib/scribddoc.rb', line 278

def download_url(format='original')
  @download_urls[format] ||= begin
    response = API.instance.send_request('docs.getDownloadUrl', :doc_id => self.id, :doc_type => format)
    response.elements['/rsp/download_link'].cdatas.first.to_s
  end
end

#id ⇒ Object

Returns the doc_id attribute.



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# File 'lib/scribddoc.rb', line 260

def id
  self.doc_id
end

#owner=(newuser) ⇒ Object

Ensures that the owner attribute cannot be set once the document is saved.



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# File 'lib/scribddoc.rb', line 267

def owner=(newuser) #:nodoc:
  saved? ? raise(NotImplementedError, "Cannot change a document's owner once the document has been saved") : super
end

#save ⇒ Object

For document objects that have not been saved for the first time, uploads the document, sets its attributes, and saves it. Otherwise, updates any changed attributes and saves it. Returns true if the save completed successfully. Throws an exception if save fails.

For first-time saves, you must have specified a file attribute. This can either be a local path to a file, or an HTTP, HTTPS, or FTP URL. In either case, the file at that location will be uploaded to create the document.

If you create a document, specify the file attribute again, and then save it, Scribd replaces the existing document with the file given, while keeping all other properties (title, description, etc.) the same, in a process called revisioning.

This method can throw a Timeout exception if the connection is slow or inaccessible. A Scribd::ResponseError will be thrown if a remote problem occurs. A Scribd::PrivilegeError will be thrown if you try to upload a new revision for a document with no associated user (i.e., one retrieved from the find method).

You must specify the type attribute alongside the file attribute if the file’s type cannot be determined from its name.



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# File 'lib/scribddoc.rb', line 91

def save
  if not created? and @attributes[:file].nil? then
    raise "'file' attribute must be specified for new documents"
    return false
  end
  
  if created? and @attributes[:file] and (@attributes[:owner].nil? or @attributes[:owner].session_key.nil?) then
    raise PrivilegeError, "The current API user is not the owner of this document"
  end
  
  # Make a request form
  fields = @attributes.dup
  if file = @attributes[:file] then
    fields.delete :file
    is_file_object = file.is_a?(File)
    file_path = is_file_object ? file.path : file
    ext = File.extname(file_path).gsub(/^\./, '')
    ext = nil if ext == ''
    fields[:doc_type] = fields.delete(:type)
    fields[:doc_type] ||= ext
    fields[:doc_type].downcase! if fields[:doc_type]
    fields[:rev_id] = fields.delete(:doc_id)
  end
  fields[:session_key] = fields.delete(:owner).session_key if fields[:owner]
  response = nil
  
  if @attributes[:file] then
    uri = nil
    begin
      uri = URI.parse @attributes[:file]
    rescue URI::InvalidURIError
      uri = nil # Some valid file paths are not valid URI's (but some are)
    end
    if uri.kind_of? URI::HTTP or uri.kind_of? URI::HTTPS or uri.kind_of? URI::FTP then
      fields[:url] = @attributes[:file]
      response = API.instance.send_request 'docs.uploadFromUrl', fields
    elsif uri.kind_of? URI::Generic or uri.nil? then
      file_obj = is_file_object ? file : File.open(file, 'r')
      fields[:file] = file_obj
      response = API.instance.send_request 'docs.upload', fields
      file_obj.close unless is_file_object
    end
  end
  
  fields = @attributes.dup # fields is what we send to the server

  if response then
    # Extract our response
    xml = response.get_elements('/rsp')[0]
    load_attributes(xml)
    @created = true
  end
  
  fields.delete :file
  fields.delete :type
  fields.delete :access
  fields.delete :conversion_status
  
  changed_attributes = fields.dup # changed_attributes is what we will stick into @attributes once we update remotely
  
  fields[:session_key] = fields[:owner].session_key if fields[:owner]
  changed_attributes[:owner] ||= API.instance.user
  fields[:doc_ids] = self.id
  
  fields.delete :owner
  
  API.instance.send_request('docs.changeSettings', fields)
  
  @attributes.update(changed_attributes)
  
  @saved = true
  return true
end