Module: Profiler::Instrumentation::NetHttpInstrumentation::RequestPatch

Defined in:
lib/profiler/instrumentation/net_http_instrumentation.rb

Instance Method Summary collapse

Instance Method Details

#request(req, body = nil, &block) ⇒ Object 



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# File 'lib/profiler/instrumentation/net_http_instrumentation.rb', line 13

def request(req, body = nil, &block)
  collector = Thread.current[:profiler_http_collector]
  return super unless collector
  # Re-entrancy guard: Net::HTTP#request calls itself recursively when
  # the connection isn't started yet. Only record the outermost call.
  return super if Thread.current[:profiler_http_recording]

  host = address.to_s
  return super if NetHttpInstrumentation.skip_host?(host)

  url = build_url(host, port, req.path, use_ssl?)
  req_body = req.body.to_s
  # Fallback: body may be passed as the 2nd argument and only applied
  # to req inside super via req.set_body_internal(body)
  req_body = body.to_s if req_body.empty? && body
  # Fallback: libraries like RestClient set body_stream instead of body
  # and pass nil as the 2nd argument to Net::HTTP#request.
  # Read the stream content, then restore it so the actual request works.
  # RestClient::Payload doesn't implement #rewind, so we fall back to
  # replacing body_stream with a fresh StringIO.
  if req_body.empty? && req.body_stream
    begin
      stream = req.body_stream
      req_body = stream.read.to_s
      if stream.respond_to?(:rewind)
        stream.rewind
      else
        req.body_stream = StringIO.new(req_body)
      end
    rescue
      req_body = ""
    end
  end
  req_headers = req.to_hash.transform_values { |v| v.join(", ") }
  request_id = SecureRandom.hex(8)
  started_at = Time.now.iso8601(3)
  t0 = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  Thread.current[:profiler_http_recording] = true

  response = super

  duration = ((Process.clock_gettime(Process::CLOCK_MONOTONIC) - t0) * 1000).round(2)
  resp_body_raw = response.body.to_s
  resp_content_encoding = response["content-encoding"].to_s.strip.downcase
  resp_body = NetHttpInstrumentation.decompress_body(resp_body_raw, resp_content_encoding)
  resp_content_type = response["content-type"].to_s
  req_content_type = req["content-type"].to_s

  processed_req = req_body.empty? ? { body: nil, encoding: "text" } : NetHttpInstrumentation.process_body(req_body, req_content_type)
  processed_resp = NetHttpInstrumentation.process_body(resp_body, resp_content_type)

  t1 = Process.clock_gettime(Process::CLOCK_MONOTONIC)

  collector.record_request(
    id: request_id,
    started_at: started_at,
    url: url,
    method: req.method,
    status: response.code.to_i,
    duration: duration,
    request_headers: req_headers,
    request_body: processed_req[:body],
    request_body_encoding: processed_req[:encoding],
    request_size: req_body.bytesize,
    response_headers: response.to_hash.transform_values { |v| v.join(", ") },
    response_body: processed_resp[:body],
    response_body_encoding: processed_resp[:encoding],
    response_size: resp_body_raw.bytesize,
    backtrace: NetHttpInstrumentation.extract_backtrace
  )

  fg = Thread.current[:profiler_flamegraph_collector]
  fg&.record_http_event(started_at: t0, finished_at: t1, url: url, method: req.method, status: response.code.to_i)

  response
rescue => e
  if defined?(t0) && t0
    duration = ((Process.clock_gettime(Process::CLOCK_MONOTONIC) - t0) * 1000).round(2)
    collector&.record_request(
      id: defined?(request_id) ? request_id : SecureRandom.hex(8),
      started_at: defined?(started_at) ? started_at : Time.now.iso8601(3),
      url: url,
      method: req.method,
      status: 0,
      duration: duration,
      request_headers: defined?(req_headers) ? req_headers : {},
      request_body: nil,
      request_body_encoding: "text",
      request_size: 0,
      response_headers: {},
      response_body: nil,
      response_body_encoding: "text",
      response_size: 0,
      backtrace: NetHttpInstrumentation.extract_backtrace,
      error: e.message
    )
  end
  raise
ensure
  Thread.current[:profiler_http_recording] = false
end