X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FHttpUtils.java;fp=src%2Fjalview%2Futil%2FHttpUtils.java;h=5e27541a01a73e9496ace6eaa3495bd7f0f6fb23;hb=304e64fb34b32659be1bbfd39fb4e15b2f79586e;hp=97c84bc2f2275c60d02a7ab1a264077f00f9987e;hpb=cfb79b69d9fa44595560659bd95d1d1cd27677ad;p=jalview.git

diff --git a/src/jalview/util/HttpUtils.java b/src/jalview/util/HttpUtils.java
index 97c84bc..5e27541 100644
--- a/src/jalview/util/HttpUtils.java
+++ b/src/jalview/util/HttpUtils.java
@@ -25,7 +25,12 @@ import java.io.File;
 import java.io.FileOutputStream;
 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
 {
@@ -66,6 +71,36 @@ public class HttpUtils
     }
     return false;
   }
+  public static boolean startsWithHttpOrHttps(String file)
+  {
+    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;
+  }
 
   /**
    * download from given URL and return a pointer to temporary file