// This internal function copies each file into a temporary zip that matches file specification, then does this for each subdirectory if requested
void ZipFile::UpdateFilesInZip(ZipFile* TempZipFile, String* FileSpec, String* CurrDirectory, int RootPathLength, UpdateOption UpdateWhen, Boolean AddNewFiles, Boolean RecurseSubdirectories, PathInclusion AddPathMethod, char* Password)
{
IEnumerator* filesEnum = Directory::GetFiles(CurrDirectory, FileSpec)->GetEnumerator();
String* fullFileName;
String* adjustedFileName;
CompressedFile* file;
DateTime lastUpdate;
bool updateFile;
while (filesEnum->MoveNext())
{
fullFileName = filesEnum->Current->ToString();
adjustedFileName = GetAdjustedFileName(fullFileName, RootPathLength, AddPathMethod);
if (file = files->get_Item(adjustedFileName))
{
lastUpdate = File::GetLastWriteTime(fullFileName);
switch (UpdateWhen)
{
case UpdateOption::Never:
updateFile = false;
break;
case UpdateOption::Always:
updateFile = true;
break;
case UpdateOption::ZipFileIsNewer:
updateFile = (DateTime::Compare(file->get_FileDateTime(), lastUpdate) > 0);
break;
case UpdateOption::DiskFileIsNewer:
updateFile = (DateTime::Compare(file->get_FileDateTime(), lastUpdate) < 0);
break;
default:
updateFile = false;
break;
}
if (updateFile)
{
// Need to update compressed file from disk, so we add the it the new temporary archive
AddFileToZip(TempZipFile, this, fullFileName, adjustedFileName, Password, S"Update Zip File");
}
else
{
// Otherwise we just copy the compressed file from the original archive
CopyFileInZip(file, this, TempZipFile, S"Update Zip File");
}
}
else if (AddNewFiles)
{
// This was a new file so we just add it the new zip, if requested...
AddFileToZip(TempZipFile, this, fullFileName, adjustedFileName, Password, S"Update Zip File");
}
}
if (RecurseSubdirectories)
{
IEnumerator* dirsEnum = Directory::GetDirectories(CurrDirectory, "*")->GetEnumerator();
while (dirsEnum->MoveNext())
UpdateFilesInZip(TempZipFile, FileSpec, dirsEnum->Current->ToString(), RootPathLength, UpdateWhen, AddNewFiles, RecurseSubdirectories, AddPathMethod, Password);
}
}
// Extracts specified files from zip
void ZipFile::Extract(String* FileSpec, String* DestPath, UpdateOption OverwriteWhen, Boolean RecurseSubdirectories, PathInclusion CreatePathMethod)
{
// Any file spec in destination path will be ignored
DestPath = JustPath(DestPath);
char* pszPassword = NULL;
char* pszFileName = NULL;
OpenFileForUnzip();
// Just wrapping in a try/catch/finally to make sure unmanaged code allocations always get released
try
{
Regex* filePattern = GetFilePatternRegularExpression(FileSpec, caseSensitive);
IEnumerator* filesEnum = files->GetEnumerator();
CompressedFile* file;
String* sourceFileName;
String* destFileName;
bool writeFile;
int err;
// Get ANSI password, if one was provided
if (password)
if (password->get_Length())
pszPassword = StringToCharBuffer(password);
// Loop through compressed file collection
while (filesEnum->MoveNext())
{
file = static_cast<CompressedFile*>(filesEnum->Current);
sourceFileName = file->get_FileName();
if (filePattern->IsMatch(GetSearchFileName(FileSpec, sourceFileName, RecurseSubdirectories)))
{
pszFileName = StringToCharBuffer(sourceFileName);
err = unzLocateFile(hUnzipFile, pszFileName, (caseSensitive ? 1 : 2));
free(pszFileName);
pszFileName = NULL;
// We should find file in zip file if it was in our compressed file collection
if (err != Z_OK) throw new CompressionException(String::Concat(S"Extract Zip File Error: Compressed file \"", sourceFileName, "\" cannot be found in zip file!"));
// Open compressed file for unzipping
if (pszPassword)
err = unzOpenCurrentFilePassword(hUnzipFile, pszPassword);
else
err = unzOpenCurrentFile(hUnzipFile);
if (err != Z_OK) throw new CompressionException(S"Extract Zip File", err);
// Get full destination file name
switch (CreatePathMethod)
{
case PathInclusion::FullPath:
destFileName = sourceFileName;
break;
case PathInclusion::NoPath:
destFileName = String::Concat(DestPath, Path::GetFileName(sourceFileName));
break;
case PathInclusion::RelativePath:
destFileName = String::Concat(DestPath, sourceFileName);
break;
}
// Make sure destination directory exists
Directory::CreateDirectory(JustPath(destFileName));
// See if destination file already exists
if (File::Exists(destFileName))
{
DateTime lastUpdate = File::GetLastWriteTime(destFileName);
switch (OverwriteWhen)
{
case UpdateOption::Never:
writeFile = false;
break;
case UpdateOption::Always:
writeFile = true;
break;
case UpdateOption::ZipFileIsNewer:
writeFile = (DateTime::Compare(file->get_FileDateTime(), lastUpdate) > 0);
break;
case UpdateOption::DiskFileIsNewer:
writeFile = (DateTime::Compare(file->get_FileDateTime(), lastUpdate) < 0);
break;
default:
writeFile = false;
break;
}
}
else
writeFile = true;
if (writeFile)
{
System::Byte buffer[] = new System::Byte[BufferSize];
System::Byte __pin * destBuff = &buffer[0]; // pin buffer so it can be safely passed into unmanaged code...
FileStream* fileStream = File::Create(destFileName);
int read;
__int64 total = 0, len = -1;
// Send initial progress event
len = file->get_UncompressedSize();
CurrentFile(destFileName, sourceFileName);
FileProgress(0, len);
// Read initial buffer
read = unzReadCurrentFile(hUnzipFile, destBuff, buffer->get_Length());
if (read < 0) throw new CompressionException(S"Extract Zip File", read);
while (read)
{
// Write data to file stream,
fileStream->Write(buffer, 0, read);
// Raise progress event
total += read;
FileProgress(total, len);
// Read next buffer from source file stream
read = unzReadCurrentFile(hUnzipFile, destBuff, buffer->get_Length());
if (read < 0) throw new CompressionException(S"Extract Zip File", read);
}
fileStream->Close();
}
// Close compressed file
unzCloseCurrentFile(hUnzipFile);
}
}
}
catch (CompressionException* ex)
{
// We just rethrow any errors back to user
throw ex;
}
catch (Exception* ex)
{
throw ex;
}
__finally
{
if (pszPassword)
free(pszPassword);
if (pszFileName)
free(pszFileName);
}
}
