protected CouchDbClientBase(CouchDbConfig config) {
   CouchDbProperties props = config.getProperties();
   httpClient = createHttpClient(props);
   gson = initGson(new GsonBuilder());
   this.config = config;
   baseURI =
       builder()
           .scheme(props.getProtocol())
           .host(props.getHost())
           .port(props.getPort())
           .path("/")
           .build();
   dbURI = builder(baseURI).path(props.getDbName()).path("/").build();
   urlCodec = new URLCodec();
 }
  /** @return {@link DefaultHttpClient} instance. */
  private HttpClient createHttpClient(CouchDbProperties props) {
    DefaultHttpClient httpclient = null;
    try {
      SchemeSocketFactory ssf = null;
      if (props.getProtocol().equals("https")) {
        TrustManager trustManager =
            new X509TrustManager() {
              public void checkClientTrusted(X509Certificate[] chain, String authType)
                  throws CertificateException {}

              public void checkServerTrusted(X509Certificate[] chain, String authType)
                  throws CertificateException {}

              public X509Certificate[] getAcceptedIssuers() {
                return null;
              }
            };
        SSLContext sslcontext = SSLContext.getInstance("TLS");
        sslcontext.init(null, new TrustManager[] {trustManager}, null);
        ssf = new SSLSocketFactory(sslcontext, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
        SSLSocket socket = (SSLSocket) ssf.createSocket(null);
        socket.setEnabledCipherSuites(new String[] {"SSL_RSA_WITH_RC4_128_MD5"});
      } else {
        ssf = PlainSocketFactory.getSocketFactory();
      }
      SchemeRegistry schemeRegistry = new SchemeRegistry();
      schemeRegistry.register(new Scheme(props.getProtocol(), props.getPort(), ssf));
      PoolingClientConnectionManager ccm = new PoolingClientConnectionManager(schemeRegistry);
      httpclient = new DefaultHttpClient(ccm);
      host = new HttpHost(props.getHost(), props.getPort(), props.getProtocol());
      context = new BasicHttpContext();
      // Http params
      httpclient.getParams().setParameter(CoreProtocolPNames.HTTP_CONTENT_CHARSET, "UTF-8");
      httpclient
          .getParams()
          .setParameter(CoreConnectionPNames.SO_TIMEOUT, props.getSocketTimeout());
      httpclient
          .getParams()
          .setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, props.getConnectionTimeout());
      int maxConnections = props.getMaxConnections();
      if (maxConnections != 0) {
        ccm.setMaxTotal(maxConnections);
        ccm.setDefaultMaxPerRoute(maxConnections);
      }
      if (props.getProxyHost() != null) {
        HttpHost proxy = new HttpHost(props.getProxyHost(), props.getProxyPort());
        httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
      }
      // basic authentication
      if (props.getUsername() != null && props.getPassword() != null) {
        httpclient
            .getCredentialsProvider()
            .setCredentials(
                new AuthScope(props.getHost(), props.getPort()),
                new UsernamePasswordCredentials(props.getUsername(), props.getPassword()));
        props.clearPassword();
        AuthCache authCache = new BasicAuthCache();
        BasicScheme basicAuth = new BasicScheme();
        authCache.put(host, basicAuth);
        context.setAttribute(ClientContext.AUTH_CACHE, authCache);
      }
      // request interceptor
      httpclient.addRequestInterceptor(
          new HttpRequestInterceptor() {
            public void process(final HttpRequest request, final HttpContext context)
                throws IOException {
              if (log.isInfoEnabled()) {
                RequestLine requestLine = request.getRequestLine();
                try {
                  log.info(
                      ">> "
                          + (new StringBuilder())
                              .append(">> ")
                              .append(requestLine.getMethod())
                              .append(" ")
                              .append(urlCodec.decode(requestLine.getUri()))
                              .toString());
                } catch (DecoderException e) {
                  log.error(e, e);
                }
              }
            }
          });
      // response interceptor
      httpclient.addResponseInterceptor(
          new HttpResponseInterceptor() {
            public void process(final HttpResponse response, final HttpContext context)
                throws IOException {
              validate(response);
              if (log.isInfoEnabled())
                log.info("<< Status: " + response.getStatusLine().getStatusCode());
            }
          });
    } catch (Exception e) {
      log.error("Error Creating HTTP client. " + e.getMessage());
      throw new IllegalStateException(e);
    }
    return httpclient;
  }