private bool FollowPath(string path, out ZipFileFolder folder, out string name)
{
string[] parts = path.ToLowerInvariant().Split(sSlashes);
if (parts.Length < 1)
{
throw new FileNotFoundException("Empty path: " + path);
}
if (parts[0].Length == 0)
{
throw new FileNotFoundException("Absolute paths not supported: " + path);
}
ZipFileFolder f = this;
for (int i = 0; i < parts.Length - 1; ++i)
{
FileFolder next;
if (!f.mFolders.TryGetValue(parts[i], out next))
{
folder = null;
name = null;
return(false);
}
f = (ZipFileFolder)next;
}
folder = f;
name = parts[parts.Length - 1];
return(true);
}
public ZipFileTree(string zipFileName)
: base("/", string.Empty)
{
mRoot = new ZipFileFolder(this, "/", string.Empty);
try
{
mZip = ZipFile.OpenRead(zipFileName);
// Enumerate all entries in the archive and fill in the tree
foreach (ZipArchiveEntry entry in mZip.Entries)
{
string[] parts = entry.FullName.Split(sSlashes);
if (parts[parts.Length - 1].Length == 0)
{
continue; // Some archives contain folder names which have trailing slashes
}
ZipFileFolder folder = mRoot;
for (int i = 0; i < parts.Length - 1; ++i)
{
folder = folder.GetOrCreateSubFolder(parts[i]);
}
folder.AddFile(parts[parts.Length - 1], entry);
}
}
catch (Exception err)
{
Dispose(true);
throw new InvalidDataException($"Corrupted zip file '{zipFileName}': {err.Message}", err);
}
}
public ZipFileFolder GetOrCreateSubFolder(string name)
{
string lcName = name.ToLowerInvariant();
FileFolder folder;
if (!mFolders.TryGetValue(lcName, out folder))
{
string subRootedName = (RootedName.Length <= 1) ? string.Concat("/", name) : string.Concat(RootedName, "/", name);
folder = new ZipFileFolder(mTree, subRootedName, name);
mFolders[lcName] = folder;
}
return((ZipFileFolder)folder);
}