def fetch
      response = process_http_request
      response.body.to_s
    rescue StandardError => error
      ProxyFetcher.logger.warn("Failed to process request to #{url} (#{error.message})")
      ''
    end
def fetch
      response = process_http_request
      response.body.to_s
    rescue StandardError => error
      ProxyFetcher.logger.warn("Failed to process request to #{url} (#{error.message})")
      ''
    end
Initialize HTTP client instance

 @return [HTTPClient]

 Fetches resource content by sending HTTP request to it.

 @return [String]
   response body