Exception: FbGraph::Exception

Inherits:
StandardError
  • Object
show all
Defined in:
lib/fb_graph/exception.rb

Constant Summary collapse

ERROR_HEADER_MATCHERS = 
{
  /invalid_token/ => "InvalidToken",
  /invalid_request/ => "InvalidRequest"
}
ERROR_EXCEPTION_MATCHERS = 
{
  /Could\snot\ssave\screative/          => "CreativeNotSaved",
  /QueryLockTimeoutException/           => "QueryLockTimeout",
  /Could\snot\screate\stargeting\sspec/ => "TargetingSpecNotSaved",
  /Could\snot\sfetch\sadgroups/         => "AdgroupFetchFailure",
  /Failed\sto\sopen\sprocess/           => "OpenProcessFailure",
  /Could\snot\scommit\stransaction/     => "TransactionCommitFailure",
  /QueryErrorException/                 => "QueryError",
  /QueryConnectionException/            => "QueryConnection",
  /QueryDuplicateKeyException/          => "QueryDuplicateKey"
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(code, message, body = '') ⇒ Exception

Returns a new instance of Exception.



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# File 'lib/fb_graph/exception.rb', line 63

def initialize(code, message, body = '')
  @code = code
  if body.present?
    response = JSON.parse(body).with_indifferent_access
    message = response[:error][:message]
    @type = response[:error][:type]
  end
  super message
end

Instance Attribute Details

#code ⇒ Object

Returns the value of attribute code.



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# File 'lib/fb_graph/exception.rb', line 3

def code
  @code
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/fb_graph/exception.rb', line 3

def type
  @type
end

Class Method Details

.handle_httpclient_error(response, headers) ⇒ Object 



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# File 'lib/fb_graph/exception.rb', line 22

def self.handle_httpclient_error(response, headers)
  return nil unless response[:error]

  # Check the WWW-Authenticate header, since it seems to be more standardized than the response
  # body error information.
  # The complex lookup is needed to follow the HTTP spec - headers should be looked up
  # without regard to case.
  www_authenticate = headers.select do |name, value|
    name.upcase == "WWW-Authenticate".upcase
  end.to_a.flatten.second
  if www_authenticate
    # Session expiration/invalidation is very common. Check for that first.
    if www_authenticate =~ /invalid_token/ && response[:error][:message] =~ /session has been invalidated/
      raise InvalidSession.new("#{response[:error][:type]} :: #{response[:error][:message]}")
    end

    ERROR_HEADER_MATCHERS.keys.each do |matcher|
      if matcher =~ www_authenticate
        exception_class = FbGraph::const_get(ERROR_HEADER_MATCHERS[matcher])
        raise exception_class.new("#{response[:error][:type]} :: #{response[:error][:message]}")
      end
    end
  end

  # If we can't match on WWW-Authenticate, use the type
  case response[:error][:type]
  when /OAuth/
    raise Unauthorized.new("#{response[:error][:type]} :: #{response[:error][:message]}")
  else
    exception_class = nil
    ERROR_EXCEPTION_MATCHERS.keys.each do |matcher|
      exception_class = FbGraph::const_get(ERROR_EXCEPTION_MATCHERS[matcher]) if matcher =~ response[:error][:message]
    end
    if exception_class
      raise exception_class.new("#{response[:error][:type]} :: #{response[:error][:message]}")
    else
      raise BadRequest.new("#{response[:error][:type]} :: #{response[:error][:message]}")
    end
  end
end