TLSv1.3 requires Java 11 at least. Fixes #927.

pom.xml

@@ -131,7 +131,7 @@
             <dependency>
                 <groupId>org.apache.commons</groupId>
                 <artifactId>commons-lang3</artifactId>
-                <version>3.1</version>
+                <version>3.10</version>
             </dependency>
             <dependency>
                 <groupId>commons-collections</groupId>

webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientGenerator.java

@@ -1,5 +1,18 @@
 package us.codecraft.webmagic.downloader;
 
+import java.io.IOException;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
+import java.util.Map;
+
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+
+import org.apache.commons.lang3.JavaVersion;
+import org.apache.commons.lang3.SystemUtils;
 import org.apache.http.HttpException;
 import org.apache.http.HttpRequest;
 import org.apache.http.HttpRequestInterceptor;
@@ -11,23 +24,18 @@ import org.apache.http.conn.socket.ConnectionSocketFactory;
 import org.apache.http.conn.socket.PlainConnectionSocketFactory;
 import org.apache.http.conn.ssl.DefaultHostnameVerifier;
 import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
-import org.apache.http.impl.client.*;
+import org.apache.http.impl.client.BasicCookieStore;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.impl.client.HttpClients;
 import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
 import org.apache.http.impl.cookie.BasicClientCookie;
 import org.apache.http.protocol.HttpContext;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import us.codecraft.webmagic.Site;
 
-import javax.net.ssl.SSLContext;
+import us.codecraft.webmagic.Site;
-import javax.net.ssl.TrustManager;
-import javax.net.ssl.X509TrustManager;
-import java.io.IOException;
-import java.security.KeyManagementException;
-import java.security.NoSuchAlgorithmException;
-import java.security.cert.CertificateException;
-import java.security.cert.X509Certificate;
-import java.util.Map;
 
 /**
  * @author code4crafter@gmail.com <br>
@@ -50,7 +58,15 @@ public class HttpClientGenerator {
 
     private SSLConnectionSocketFactory buildSSLConnectionSocketFactory() {
         try {
-            return new SSLConnectionSocketFactory(createIgnoreVerifySSL(), new String[]{"SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"},
+            SSLContext sslContext = createIgnoreVerifySSL();
+            String[] supportedProtocols;
+            if (SystemUtils.isJavaVersionAtLeast(JavaVersion.JAVA_11)) {
+                supportedProtocols = new String[] { "SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3" };
+            } else {
+                supportedProtocols = new String[] { "SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2" };
+            }
+            logger.info("supportedProtocols: {}", String.join(", ", supportedProtocols));
+            return new SSLConnectionSocketFactory(sslContext, supportedProtocols,
                     null,
                     new DefaultHostnameVerifier()); // 优先绕过安全证书
         } catch (KeyManagementException e) {