public String perform()

in src/main/java/com/epam/dep/esp/common/web/WebUtils.java [119:184]
54 lines of code
15 McCabe index (conditional complexity)

    public String perform(int i, int time) throws HttpException {
        HttpURLConnection conn = null;
        try {

            if (i == 0) throw new HttpException("Unable to perform operation");
            //TODO add multi address support
            //TODO add PORT support
            conn = getConnection(10);
            int responseCode = conn.getResponseCode();
            logger.info("{} \t Response {}", conn.getURL(), responseCode);

            switch (responseCode) {
                case 401:
                    throw new HttpException(conn.getURL().getPath());
                case 500:
                    logger.info("Retrying in {} sec...", time);
                    Thread.sleep(time * 1000);
                    conn.disconnect();
                    return perform(i - 1, time * 2);
            }
            String encoding = conn.getContentEncoding();
            // allow both GZip and Deflate (ZLib) encodings
            InputStream inStr = null;

            // create the appropriate stream wrapper based on
            // the encoding type

            if (responseCode < HttpURLConnection.HTTP_BAD_REQUEST) {
                if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
                    inStr = new GZIPInputStream(conn.getInputStream());
                } else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
                    inStr = new InflaterInputStream(conn.getInputStream(),
                            new Inflater(true));
                } else {
                    inStr = conn.getInputStream();
                }
            } else {
                /* error from server */
                inStr = conn.getErrorStream();
            }

            InputStreamReader isr = new InputStreamReader(inStr);
            int numCharsRead;
            char[] charArray = new char[1024];
            StringBuilder sb = new StringBuilder();
            while ((numCharsRead = isr.read(charArray)) > 0) {
                sb.append(charArray, 0, numCharsRead);
            }
            String result = sb.toString();
            if (responseCode >= HttpURLConnection.HTTP_BAD_REQUEST) {
                throw new HttpException("Response code is " + responseCode + " message: " + result);
            }
            return result;

        } catch (MalformedURLException | URISyntaxException e) {
            throw new HttpException("Can't find path: " + path);
        } catch (IOException e) {
            throw new HttpException("Server is offline: " + path + " " + e.getMessage(), e);
        } catch (InterruptedException e) {
            throw new HttpException("InterruptedException", e);
        } finally {
            if (conn != null) {
                conn.disconnect();
            }
        }
    }