Support for very long file names

1 files changed, 36 insertions, 5 deletions

diff --git a/TarStream.cs b/TarStream.cs
index e701b163..4ffcf3ea 100644
--- a/TarStream.cs
+++ b/TarStream.cs
@@ -10,12 +10,13 @@ namespace com.clusterrr.util
     {

         List<string> entries = new List<string>();

         readonly string rootDirectory;

+        const string LongLinkFlag = "././@LongLink";

         long totalSize = 0;

         long position = 0;

         int currentEntry = 0;

         long currentEntryPosition = 0;

         long currentEntryLength = 0;

-        FileStream currentFile = null;

+        Stream currentFile = null;

         byte[] currentHeader;

 

         public delegate void OnProgressDelegate(long Position, long Length);

@@ -97,6 +98,18 @@ namespace com.clusterrr.util
                 throw new Exception("Invarid root directory");

 

             LoadDirectory(directory);

+            for (int i = entries.Count - 1; i >= 0; i--) // Checking filenames

+            {

+                var name = entries[i].Substring(rootDirectory.Length + 1).Replace(@"\", "/");

+                if (name.Length > 99) // Need to create LongLink

+                {

+                    entries.Insert(i, LongLinkFlag);

+                    int size = name.Length;

+                    if (size % 512 != 0)

+                        size += 512 - (size % 512);

+                    totalSize += 512 + size;

+                }

+            }

             if (totalSize % 10240 != 0)

                 totalSize += (10240 - (totalSize % 10240));

             this.rootDirectory = rootDirectory;

@@ -191,14 +204,32 @@ namespace com.clusterrr.util
                 {

                     currentEntryLength = 512;

                     var header = new TarHeader();

-                    header.FileName = entries[currentEntry].Substring(rootDirectory.Length + 1).Replace(@"\", "/");

-                    // close previous file

+                    if (entries[currentEntry] != LongLinkFlag)

+                        header.FileName = entries[currentEntry].Substring(rootDirectory.Length + 1).Replace(@"\", "/");

                     if (currentFile != null)

                     {

                         currentFile.Dispose();

                         currentFile = null;

                     }

-                    if (!header.FileName.EndsWith("/")) // It's a file!

+                    if (entries[currentEntry] == LongLinkFlag)

+                    {

+                        header.FileName = entries[currentEntry];

+                        header.FileMode = "0000000";

+                        var name = entries[currentEntry+1].Substring(rootDirectory.Length + 1).Replace(@"\", "/");

+                        var nameBuff = Encoding.UTF8.GetBytes(name);

+                        currentFile = new MemoryStream(nameBuff.Length + 1);

+                        currentFile.Write(nameBuff, 0, nameBuff.Length);

+                        currentFile.WriteByte(0);

+                        currentFile.Seek(0, SeekOrigin.Begin);

+                        currentEntryLength += currentFile.Length;

+                        if (currentFile.Length % 512 != 0)

+                            currentEntryLength += 512 - (currentFile.Length % 512);

+                        header.FileSize = Convert.ToString(currentFile.Length, 8).PadLeft(11, '0');

+                        header.LastModificationTime = "0".PadLeft(11, '0');

+                        header.FileType = 'L';

+

+                    }

+                    else if (!header.FileName.EndsWith("/")) // It's a file!

                     {

                         currentFile = new FileStream(entries[currentEntry], FileMode.Open);

                         header.FileMode = "0100644";

@@ -211,7 +242,7 @@ namespace com.clusterrr.util
                             , 8).PadLeft(11, '0');

                         header.FileType = '0';

                     }

-                    else // It's a directory...

+                    else if (header.FileName.EndsWith("/")) // It's a directory...

                     {

                         header.FileMode = "0040755";

                         header.FileSize = "".PadLeft(11, '0');