Repository: commons-compress
Updated Branches:
  refs/heads/master 03239b0ea -> a428e428d


Refactor magic number.

Project: http://git-wip-us.apache.org/repos/asf/commons-compress/repo
Commit: http://git-wip-us.apache.org/repos/asf/commons-compress/commit/a428e428
Tree: http://git-wip-us.apache.org/repos/asf/commons-compress/tree/a428e428
Diff: http://git-wip-us.apache.org/repos/asf/commons-compress/diff/a428e428

Branch: refs/heads/master
Commit: a428e428df2766f1d1b2b793b3f812344fa61fdc
Parents: 03239b0
Author: Gary Gregory <ggreg...@apache.org>
Authored: Thu Dec 8 23:45:42 2016 -0800
Committer: Gary Gregory <ggreg...@apache.org>
Committed: Thu Dec 8 23:45:42 2016 -0800

----------------------------------------------------------------------
 .../commons/compress/archivers/ArchiveStreamFactory.java       | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
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http://git-wip-us.apache.org/repos/asf/commons-compress/blob/a428e428/src/main/java/org/apache/commons/compress/archivers/ArchiveStreamFactory.java
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diff --git 
a/src/main/java/org/apache/commons/compress/archivers/ArchiveStreamFactory.java 
b/src/main/java/org/apache/commons/compress/archivers/ArchiveStreamFactory.java
index ba786a4..dc59405 100644
--- 
a/src/main/java/org/apache/commons/compress/archivers/ArchiveStreamFactory.java
+++ 
b/src/main/java/org/apache/commons/compress/archivers/ArchiveStreamFactory.java
@@ -88,6 +88,8 @@ import org.apache.commons.compress.utils.Sets;
  */
 public class ArchiveStreamFactory implements ArchiveStreamProvider {
 
+    private static final int TAR_HEADER_SIZE = 512;
+
     private static final int DUMP_SIGNATURE_SIZE = 32;
 
     private static final int SIGNATURE_SIZE = 12;
@@ -508,7 +510,7 @@ public class ArchiveStreamFactory implements 
ArchiveStreamProvider {
             }
 
             // Tar needs an even bigger buffer to check the signature; read 
the first block
-            final byte[] tarheader = new byte[512];
+            final byte[] tarheader = new byte[TAR_HEADER_SIZE];
             in.mark(tarheader.length);
             signatureLength = IOUtils.readFully(in, tarheader);
             in.reset();
@@ -516,7 +518,7 @@ public class ArchiveStreamFactory implements 
ArchiveStreamProvider {
                 return createArchiveInputStream(TAR, in);
             }
             // COMPRESS-117 - improve auto-recognition
-            if (signatureLength >= 512) {
+            if (signatureLength >= TAR_HEADER_SIZE) {
                 TarArchiveInputStream tais = null;
                 try {
                     tais = new TarArchiveInputStream(new 
ByteArrayInputStream(tarheader));

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