### Question:
Certificate { public static PublicKey getPublicKeyFromUrl(String signaturecerturl) { if (!isBaiduDomain(signaturecerturl)) { return null; } try { URL url = new URL(signaturecerturl); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setConnectTimeout(3 * 1000); InputStream inputStream = connection.getInputStream(); CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509"); X509Certificate certificate = (X509Certificate) certificateFactory.generateCertificate(inputStream); PublicKey publicKey = certificate.getPublicKey(); return publicKey; } catch (Exception e) { return null; } } Certificate(final String signature, final String signaturecerturl, final String message);  Certificate(HttpServletRequest request); static boolean verify(ConcurrentHashMap<String, PublicKey> cache, Certificate certificate); static PublicKey getPublicKeyFromUrl(String signaturecerturl); String getSignature(); String getSignaturecerturl(); String getMessage();  }### Answer:
@Test public void testGetPublicKeyFromUrl() { fail("Not yet implemented"); }