X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FHttpUtils.java;h=0454cabc3a7036ebedcad745d28a44401c1cc32b;hb=404d5b51a7a7781ad6924df6a7ce63c754370f16;hp=74f77a2ca72bc3c77e7e73777adeddb1d778809d;hpb=aada6c7d3345363bf8b889f960c6209e7bbe8c06;p=jalview.git

diff --git a/src/jalview/util/HttpUtils.java b/src/jalview/util/HttpUtils.java
index 74f77a2..0454cab 100644
--- a/src/jalview/util/HttpUtils.java
+++ b/src/jalview/util/HttpUtils.java
@@ -22,7 +22,12 @@ package jalview.util;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.ProtocolException;
 import java.net.URL;
+import java.util.List;
+
+import javax.ws.rs.HttpMethod;
 
 public class HttpUtils
 {
@@ -69,4 +74,31 @@ public class HttpUtils
     return file.startsWith("http://") || file.startsWith("https://");
   }
 
+  /**
+   * wrapper to get/post to a URL or check headers
+   * 
+   * @param url
+   * @param ids
+   * @param readTimeout
+   * @return
+   * @throws IOException
+   * @throws ProtocolException
+   */
+  public static boolean checkUrlAvailable(URL url, int readTimeout)
+          throws IOException, ProtocolException
+  {
+    // System.out.println(System.currentTimeMillis() + " " + url);
+
+    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+
+    connection.setRequestMethod(HttpMethod.HEAD);
+
+    connection.setDoInput(true);
+
+    connection.setUseCaches(false);
+    connection.setConnectTimeout(300);
+    connection.setReadTimeout(readTimeout);
+    return connection.getResponseCode() == 200;
+  }
+
 }