fixed bug with computing MD5 hash and multithreading

src/test/java/ClientTest.java

@@ -1,17 +1,24 @@
 import com.thoughtworks.xstream.XStream;
-import org.jpacrepo.model.PkgData;
 import org.jboss.resteasy.plugins.providers.RegisterBuiltin;
 import org.jboss.resteasy.plugins.providers.jackson.ResteasyJacksonProvider;
 import org.jboss.resteasy.spi.ResteasyProviderFactory;
+import org.jpacrepo.model.PkgData;
+import org.jpacrepo.pacbase.Hasher;
+import org.jpacrepo.pacbase.MD5InputStream;
+import org.jpacrepo.pacbase.Parser;
 import org.junit.Test;
 
 import javax.ws.rs.client.*;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.UriBuilder;
-import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.security.DigestInputStream;
+import java.security.MessageDigest;
 
 /**
  * Created by walter on 29/03/15.
@@ -57,4 +64,39 @@ public class ClientTest
         System.out.println(response.getStatusInfo());
         assert Response.Status.CREATED.getStatusCode() == response.getStatus();
     }
+
+    @Test
+    public void hashTest() throws Exception
+    {
+        String[] files = new String[]{"/var/cache/pacman/pkg/mesa-10.4.5-1-x86_64.pkg.tar.xz", "/var/cache/pacman/pkg/mesa-10.5.3-1-x86_64.pkg.tar.xz"};
+
+        for (String file : files)
+        {
+            MessageDigest md = MessageDigest.getInstance("MD5");
+            try (InputStream is = Files.newInputStream(Paths.get(file)))
+            {
+                DigestInputStream dis = new DigestInputStream(is, md);
+                dis.on(true);
+//                is.read();
+                long a = new File(file).length();
+                byte[] out = new byte[(int)a];
+                dis.read(out, 0, (int) a);
+            }
+            System.out.println(Hasher.bytesToHex(md.digest()));
+
+            System.out.println(Hasher.computeMD5(new FileInputStream(file)));
+
+            InputStream fis = new FileInputStream(file);
+            MD5InputStream h = Hasher.createMD5InputStream(fis);
+            long a = new File(file).length();
+            byte[] out = new byte[(int)a];
+            h.read(out, 0, (int) a);
+            System.out.println(h.digest());
+
+            PkgData p = new Parser().parseFile(new File(file));
+            System.out.println(p.md5sum);
+
+        }
+
+    }
 }