Module: Coolhand::NetHttpInterceptor

Includes:
BaseInterceptor
Defined in:
lib/coolhand/net_http_interceptor.rb

Defined Under Namespace

Modules: ResponseInterceptor

Constant Summary

Constants included from BaseInterceptor

BaseInterceptor::SENSITIVE_HEADER_PATTERN, BaseInterceptor::SENSITIVE_QUERY_PARAM_PATTERN

Class Method Summary collapse

Instance Method Summary collapse

Methods included from BaseInterceptor

normalize_header_value, parse_json, sanitize_headers, sanitize_url, send_complete_request_log

Class Method Details

.patch! ⇒ Object 



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# File 'lib/coolhand/net_http_interceptor.rb', line 27

def self.patch!
  return if @patched

  Net::HTTP.prepend(self)
  Net::HTTPResponse.prepend(ResponseInterceptor)

  @patched = true
  Coolhand.log "🔗 Net::HTTP interceptor patched"
end

.patched? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coolhand/net_http_interceptor.rb', line 44

def self.patched?
  @patched
end

.unpatch! ⇒ Object 



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# File 'lib/coolhand/net_http_interceptor.rb', line 37

def self.unpatch!
  # NOTE: With prepend, there's no clean way to unpatch
  # We'll mark it as unpatched so it can be re-patched
  @patched = false
  Coolhand.log "🔌 Faraday monitoring disabled ..."
end

Instance Method Details

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



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# File 'lib/coolhand/net_http_interceptor.rb', line 48

def request(req, body = nil, &block)
  return super unless NetHttpInterceptor.patched?

  active = (Thread.current[:coolhand_active_requests] ||= {}.compare_by_identity)
  return super if active.key?(self)

  url = build_url_for_request(self, req)
  return super unless intercept?(url)
  return super unless should_capture?

  # Capture body before setting the guard — if this raises we skip logging cleanly
  # and the guard is never set, so there is no leak. A failure here (e.g. an
  # already-consumed body_stream) must never prevent the real request below
  # from being attempted — this gem must never be the reason the host
  # app's actual LLM call doesn't happen.
  captured_body = begin
    capture_request_body(req, body)
  rescue StandardError => e
    Coolhand.log "❌ Error capturing request body: #{e.message}"
    nil
  end

  active[self] = true
  start_time = Time.now
  request_id = SecureRandom.uuid
  response = nil
  status_code = nil
  response_body = nil

  # Save/restore rather than just nil-ing: a request made from inside
  # this request's own streaming block (nested interception) would
  # otherwise clobber this request's in-progress buffer with its own
  # chunks, mixing one request's content into another's log.
  previous_stream_buffer = Thread.current[:coolhand_stream_buffer]
  previous_capturing_stream = Thread.current[:coolhand_capturing_stream]
  Thread.current[:coolhand_stream_buffer] = nil
  Thread.current[:coolhand_capturing_stream] = true

  begin
    response = super
    body_content = Thread.current[:coolhand_stream_buffer] || response&.body
    body_content = body_content.dup.force_encoding("UTF-8") if body_content.is_a?(String)
    status_code = response.respond_to?(:code) ? response.code.to_i : nil
    response_body = parse_json(body_content)
  rescue StandardError => e
    status_code = extract_status_from_exception(e)
    response_body = { "error" => { "class" => e.class.name, "message" => e.message } }
    raise
  ensure
    active.delete(self)
    Thread.current[:coolhand_stream_buffer] = previous_stream_buffer
    Thread.current[:coolhand_capturing_stream] = previous_capturing_stream
    end_time = Time.now
    duration_ms = ((end_time - start_time) * 1000).round(2)

    send_complete_request_log(
      request_id: request_id,
      method: req.method,
      url: url,
      request_headers: sanitize_headers(req),
      request_body: captured_body,
      response_headers: sanitize_headers(response),
      response_body: response_body,
      status_code: status_code,
      start_time: start_time,
      end_time: end_time,
      duration_ms: duration_ms,
      is_streaming: !!block
    )
  end

  response
end