Class: Facebook::GraphClient

Inherits:
Object
  • Object
show all
Defined in:
lib/facebook-graphclient.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(facebook_settings = {}) ⇒ GraphClient

Returns a new instance of GraphClient.



18
19
20
21
22
23
24
25
26
27
28
 
# File 'lib/facebook-graphclient.rb', line 18

def initialize facebook_settings = {}
  @app_id       = facebook_settings[:app_id]
  @api_key      = facebook_settings[:api_key]
  @secret       = facebook_settings[:secret]

  @cookie = get_user_cookie facebook_settings[:cookies]

  @access_token = facebook_settings[:access_token] || @cookie['access_token']

  @session = Patron::Session.new
end

Instance Attribute Details

#access_token ⇒ Object

Returns the value of attribute access_token.



16
17
18
 
# File 'lib/facebook-graphclient.rb', line 16

def access_token
  @access_token
end

#api_key ⇒ Object (readonly)

Returns the value of attribute api_key.



15
16
17
 
# File 'lib/facebook-graphclient.rb', line 15

def api_key
  @api_key
end

#app_id ⇒ Object (readonly)

Returns the value of attribute app_id.



15
16
17
 
# File 'lib/facebook-graphclient.rb', line 15

def app_id
  @app_id
end

#secret ⇒ Object (readonly)

Returns the value of attribute secret.



15
16
17
 
# File 'lib/facebook-graphclient.rb', line 15

def secret
  @secret
end

Instance Method Details

#[](k) ⇒ Object 



124
125
126
 
# File 'lib/facebook-graphclient.rb', line 124

def [] k
  params[k]
end

#api(action, method, query_params = nil) ⇒ Object 



46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
 
# File 'lib/facebook-graphclient.rb', line 46

def api action, method, query_params = nil
  query_params[:access_token] ||= @access_token

  query_string = '?' + query_params.map { |k,v| "#{k}=#{v}" }.join("&") unless query_params.empty?

  tries = 0
  begin
    raw_response = @session.send(action, GRAPH_URL + method + query_string)
  rescue Patron::HostResolutionError, Patron::ConnectionFailed
    retry if tries < 5
    tries += 1
  end

  # TODO: Handle photo requests, which return photo data and not JSON

  if raw_response.headers['Content-Type'] =~ /text\/javascript/
    # We have JSON
    json = ["false", '', nil].include?(raw_response.body) ? '{}' : raw_response.body
    response = Yajl::Parser.parse(json)

    if e = response['error']
      error = FacebookError.new(e['message'])
      error.data = e
      raise error
    else
      response
    end
  end
end

#fql(query) ⇒ Object 



76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
 
# File 'lib/facebook-graphclient.rb', line 76

def fql query
  query_params = {
    :access_token => @access_token,
    :format => 'json',
    :query => Rack::Utils.escape(query)
  }

  query_string = '?' + query_params.map { |k,v| "#{k}=#{v}" }.join("&") unless query_params.empty?

  tries = 0
  begin
    raw_response = @session.get("https://api.facebook.com/method/fql.query" + query_string)
  rescue Patron::HostResolutionError, Patron::ConnectionFailed
    retry if tries < 5
    tries += 1
  end

  json = ["false", '', nil].include?(raw_response.body) ? '{}' : raw_response.body
  response = Yajl::Parser.parse(json)

  if e = response.first['error']
    error = FacebookError.new(e['message'])
    error.data = e
    raise error
  else
    response
  end
end

#get_user_cookie(cookies) ⇒ Object 



30
31
32
33
34
35
36
 
# File 'lib/facebook-graphclient.rb', line 30

def get_user_cookie cookies
  if cookies and cookie = cookies["fbs_#{@app_id}"]
    Rack::Utils.parse_nested_query(cookie)
  else
    {}
  end
end

#params ⇒ Object 



128
129
130
 
# File 'lib/facebook-graphclient.rb', line 128

def params
  valid? ? @params : {}
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
 
# File 'lib/facebook-graphclient.rb', line 105

def valid?
  return false if @cookie.nil?

  unless @is_valid
    vars = @cookie.dup

    good_sig = vars.delete 'sig'
    sig = Digest::MD5.hexdigest(vars.sort.map { |k,v| "#{k}=#{v}" }.compact.join + @secret)

    if @is_valid = (sig == good_sig)
      @params = vars
    else
      @params = {}
    end
  end

  @is_valid
end