docs: public static UriComponentsBuilder fromHttpUrl(String httpUrl) {
  		Assert.notNull(httpUrl, "'httpUrl' must not be null");
  		Matcher matcher = HTTP_URL_PATTERN.matcher(httpUrl);
  		if (matcher.matches()) {
  			UriComponentsBuilder builder = new UriComponentsBuilder();
  			String scheme = matcher.group(1);
  			builder.scheme(scheme != null ? scheme.toLowerCase() : null);
  			builder.userInfo(matcher.group(4));
  			String host = matcher.group(5);
  			if (StringUtils.hasLength(scheme) && !StringUtils.hasLength(host)) {
  				throw new IllegalArgumentException("[" + httpUrl + "] is not a valid HTTP URL");
  			}
  			builder.host(host);
  			String port = matcher.group(7);
  			if (StringUtils.hasLength(port)) {
  				builder.port(port);
  			}
  			builder.path(matcher.group(8));
  			builder.query(matcher.group(10));
  			return builder;
  		}
  		else {
  			throw new IllegalArgumentException("[" + httpUrl + "] is not a valid HTTP URL");
  		}
  	}