X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FHttpUtils.java;h=5438d4e0e39aeb738b3ff11f2c3d19afe892cf48;hb=HEAD;hp=74f77a2ca72bc3c77e7e73777adeddb1d778809d;hpb=9041085cce94f093479be520a8f3553de6e2381f;p=jalview.git

diff --git a/src/jalview/util/HttpUtils.java b/src/jalview/util/HttpUtils.java
index 74f77a2..5438d4e0 100644
--- a/src/jalview/util/HttpUtils.java
+++ b/src/jalview/util/HttpUtils.java
@@ -22,8 +22,14 @@ package jalview.util;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.ProtocolException;
 import java.net.URL;
 
+import javax.ws.rs.HttpMethod;
+
+import jalview.bin.Cache;
+
 public class HttpUtils
 {
 
@@ -69,4 +75,73 @@ 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
+  {
+    // jalview.bin.Console.outPrintln(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;
+  }
+
+  public static String getUserAgent()
+  {
+    return getUserAgent(null);
+  }
+
+  public static String getUserAgent(String className)
+  {
+    StringBuilder sb = new StringBuilder();
+    sb.append("Jalview");
+    sb.append('/');
+    sb.append(Cache.getDefault("VERSION", "Unknown"));
+    sb.append(" (");
+    sb.append(System.getProperty("os.name"));
+    sb.append("; ");
+    sb.append(System.getProperty("os.arch"));
+    sb.append(' ');
+    sb.append(System.getProperty("os.name"));
+    sb.append(' ');
+    sb.append(System.getProperty("os.version"));
+    sb.append("; ");
+    sb.append("java/");
+    sb.append(System.getProperty("java.version"));
+    sb.append("; ");
+    sb.append("jalview/");
+    sb.append(ChannelProperties.getProperty("channel"));
+    if (className != null)
+    {
+      sb.append("; ");
+      sb.append(className);
+    }
+    String installation = Cache.applicationProperties
+            .getProperty("INSTALLATION");
+    if (installation != null)
+    {
+      sb.append("; ");
+      sb.append(installation);
+    }
+    sb.append(')');
+    sb.append(" help@jalview.org");
+    return sb.toString();
+  }
+
 }