content: /*
   * Copyright 2002-2019 Drew Noakes and contributors
   *
   *    Licensed under the Apache License, Version 2.0 (the "License");
   *    you may not use this file except in compliance with the License.
   *    You may obtain a copy of the License at
   *
   *        https://www.apache.org/licenses/LICENSE-2.0
   *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   *
   * More information about this project is available at:
   *
   *    https://drewnoakes.com/code/exif/
   *    https://github.com/drewnoakes/metadata-extractor
   */
  
  package com.drew.tools;
  
  import com.drew.imaging.ImageMetadataReader;
  import com.drew.imaging.ImageProcessingException;
  import com.drew.imaging.jpeg.JpegProcessingException;
  import com.drew.metadata.Directory;
  import com.drew.metadata.Metadata;
  import com.drew.metadata.Tag;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.URL;
  import java.net.URLConnection;
  
  /**
   * Utility that extracts metadata found at a given URL.
   *
   * @author Drew Noakes https://drewnoakes.com
   */
  public class ProcessUrlUtility
  {
      public static void main(String[] args) throws IOException, JpegProcessingException
      {
          if (args.length == 0) {
              System.err.println("Expects one or more URLs as arguments.");
              System.exit(1);
          }
  
          for (String url : args)
              processUrl(new URL(url));
  
          System.out.println("Completed.");
      }
  
      private static void processUrl(URL url) throws IOException
      {
          URLConnection con = url.openConnection();
  //        con.setConnectTimeout(connectTimeout);
  //        con.setReadTimeout(readTimeout);
          InputStream in = con.getInputStream();
  
          // Read metadata
          final Metadata metadata;
          try {
              metadata = ImageMetadataReader.readMetadata(in);
          } catch (ImageProcessingException e) {
              // this is an error in the Jpeg segment structure.  we're looking for bad handling of
              // metadata segments.  in this case, we didn't even get a segment.
              System.err.printf("%s: %s [Error Extracting Metadata]%n\t%s%n", e.getClass().getName(), url, e.getMessage()); return;
          } catch (Throwable t) {
              // general, uncaught exception during processing of jpeg segments
              System.err.printf("%s: %s [Error Extracting Metadata]%n", t.getClass().getName(), url);
              t.printStackTrace(System.err);
              return;
          }
  
          if (metadata.hasErrors()) {
              System.err.println(url);
              for (Directory directory : metadata.getDirectories()) {
                  if (!directory.hasErrors())
                      continue;
                  for (String error : directory.getErrors()) {
                      System.err.printf("\t[%s] %s%n", directory.getName(), error);
                  }
              }
          }
  
          // Iterate through all values
          for (Directory directory : metadata.getDirectories()) {
              for (Tag tag : directory.getTags()) {
                  String tagName = tag.getTagName();
                  String directoryName = directory.getName();
                  String description = tag.getDescription();
  
                  // truncate the description if it's too long
                  if (description != null && description.length() > 1024) {
                      description = description.substring(0, 1024) + "...";
                  }
  
                  System.out.printf("[%s] %s = %s%n", directoryName, tagName, description);
              }
          }
  
  //        if (processedCount > 0)
  //            System.out.println(String.format("Processed %,d files (%,d bytes) with %,d exceptions and %,d file errors in %s", processedCount, byteCount, exceptionCount, errorCount, path));
      }
  }
  