Module: Tripod::Streaming

Defined in:
lib/tripod/streaming.rb

Class Method Summary collapse

Class Method Details

.get_data(request_url, opts = {}) ⇒ Object

stream data from a url opts   :accept => “/”

:timeout_seconds = 10
:limit_bytes = nil



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/tripod/streaming.rb', line 11

def self.get_data(request_url, opts={})

  accept = opts[:accept] || "*/*"
  timeout_in_seconds = opts[:timeout_seconds] || 10
  limit_in_bytes = opts[:response_limit_bytes]

  uri = URI(request_url)

  http = Net::HTTP.new(uri.host, uri.port)
  http.read_timeout = timeout_in_seconds

  total_bytes = 0
  response_string = ""

  request_start_time = Time.now if Tripod.logger.debug?

  begin
    http.request_get(uri.request_uri, 'Accept' => accept) do |res|

      response_duration = Time.now - request_start_time if Tripod.logger.debug?

      Tripod.logger.debug "TRIPOD: received response code: #{res.code} in: #{response_duration} secs"
      raise Tripod::Errors::BadSparqlRequest.new(res.body) if res.code.to_s != "200"

      stream_start_time = Time.now if Tripod.logger.debug?

      res.read_body do |seg|
        total_bytes += seg.size
        response_string += seg.to_s
        # if there's a limit, stop when we reach it
        raise Tripod::Errors::SparqlResponseTooLarge.new if limit_in_bytes && (total_bytes > limit_in_bytes)
      end

      if Tripod.logger.debug?
        stream_duration = Time.now - stream_start_time if
        total_request_time = Time.now - request_start_time
      end

      Tripod.logger.debug "TRIPOD: #{total_bytes} bytes streamed in: #{stream_duration} secs"
      Tripod.logger.debug "TRIPOD: total request time: #{total_request_time} secs"
    end
  rescue Timeout::Error => timeout
    raise Tripod::Errors::Timeout.new
  end

  response_string

end