protected Reader acquireRemoteURLReader()

in velocity-tools-generic/src/main/java/org/apache/velocity/tools/generic/ImportSupport.java [198:303]
91 lines of code
15 McCabe index (conditional complexity)

    protected Reader acquireRemoteURLReader(String url) throws  IOException
    {
        // remote URL
        URLConnection uc = null;
        HttpURLConnection huc = null;
        InputStream i = null;

        try
        {
            // handle remote URLs ourselves, using java.net.URL
            URL u = ConversionUtils.toURL(url);
            uc = u.openConnection();
            i = uc.getInputStream();

            // check response code for HTTP URLs, per spec,
            if (uc instanceof HttpURLConnection)
            {
                huc = (HttpURLConnection)uc;

                int status = huc.getResponseCode();
                if (status < 200 || status > 299)
                {
                    throw new IOException(status + " " + url);
                }
            }

            // okay, we've got a stream; encode it appropriately
            Reader r = null;
            String charSet;

            // charSet extracted according to RFC 2045, section 5.1
            String contentType = uc.getContentType();
            if (contentType != null)
            {
                charSet = ImportSupport.getContentTypeAttribute(contentType, "charset");
                if (charSet == null)
                {
                    charSet = RuntimeConstants.ENCODING_DEFAULT;
                }
            }
            else
            {
                charSet = RuntimeConstants.ENCODING_DEFAULT;
            }

            try
            {
                r = new InputStreamReader(i, charSet);
            }
            catch (UnsupportedEncodingException ueex)
            {
                r = new InputStreamReader(i, RuntimeConstants.ENCODING_DEFAULT);
            }

            if (huc == null)
            {
                return r;
            }
            else
            {
                return new SafeClosingHttpURLConnectionReader(r, huc);
            }
        }
        catch (IOException ex)
        {
            if (i != null)
            {
                try
                {
                    i.close();
                }
                catch (IOException ioe)
                {
                    getLog().error("Could not close InputStream", ioe);
                }
            }

            if (huc != null)
            {
                huc.disconnect();
            }
            throw new IOException("Problem accessing the remote URL \""
                + url + "\". " + ex);
        }
        catch (RuntimeException ex)
        {
            if (i != null)
            {
                try
                {
                    i.close();
                }
                catch (IOException ioe)
                {
                    getLog().error("Could not close InputStream", ioe);
                }
            }

            if (huc != null)
            {
                huc.disconnect();
            }
            // because the spec makes us
            throw new IOException("Problem accessing the remote URL \"" + url + "\" :" + ex.getMessage(), ex);
        }
    }