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//
// Zip.swift
// Zip
//
// Created by Roy Marmelstein on 13/12/2015.
// Copyright © 2015 Roy Marmelstein. All rights reserved.
//
import Foundation
import minizip
/// Zip error type
public enum ZipError: ErrorType {
/// File not found
case FileNotFound
/// Unzip fail
case UnzipFail
/// Zip fail
case ZipFail
/// User readable description
public var description: String {
switch self {
case .FileNotFound: return NSLocalizedString("File not found.", comment: "")
case .UnzipFail: return NSLocalizedString("Failed to unzip file.", comment: "")
case .ZipFail: return NSLocalizedString("Failed to zip file.", comment: "")
}
}
}
/// Zip class
public class Zip {
// MARK: Lifecycle
/**
Init
- returns: Zip object
*/
public init () {
}
// MARK: Unzip
/**
Unzip file
- parameter zipFilePath: Local file path of zipped file. NSURL.
- parameter destination: Local file path to unzip to. NSURL.
- parameter overwrite: Overwrite bool.
- parameter password: Optional password if file is protected.
- parameter progress: A progress closure called after unzipping each file in the archive. Double value betweem 0 and 1.
- throws: Error if unzipping fails or if fail is not found. Can be printed with a description variable.
*/
public class func unzipFile(zipFilePath: NSURL, destination: NSURL, overwrite: Bool, password: String?, progress: ((progress: Double) -> ())?) throws {
// File manager
let fileManager = NSFileManager.defaultManager()
// Check whether a zip file exists at path.
guard let path = zipFilePath.path, let destinationPath = destination.path else {
throw ZipError.FileNotFound
}
if fileManager.fileExistsAtPath(path) == false || zipFilePath.pathExtension != "zip" {
throw ZipError.FileNotFound
}
// Unzip set up
var ret: Int32 = 0
var crc_ret: Int32 = 0
let bufferSize: UInt32 = 4096
var buffer = Array<CUnsignedChar>(count: Int(bufferSize), repeatedValue: 0)
// Progress handler set up
var totalSize: Double = 0.0
var currentPosition: Double = 0.0
let fileAttributes = try fileManager.attributesOfItemAtPath(path)
if let attributeFileSize = fileAttributes[NSFileSize] as? Double {
totalSize += attributeFileSize
}
// Begin unzipping
let zip = unzOpen64(path)
if unzGoToFirstFile(zip) != UNZ_OK {
throw ZipError.UnzipFail
}
repeat {
if let cPassword = password?.cStringUsingEncoding(NSASCIIStringEncoding) {
ret = unzOpenCurrentFilePassword(zip, cPassword)
}
else {
ret = unzOpenCurrentFile(zip);
}
if ret != UNZ_OK {
throw ZipError.UnzipFail
}
var fileInfo = unz_file_info64()
memset(&fileInfo, 0, sizeof(unz_file_info))
ret = unzGetCurrentFileInfo64(zip, &fileInfo, nil, 0, nil, 0, nil, 0)
if ret != UNZ_OK {
unzCloseCurrentFile(zip)
throw ZipError.UnzipFail
}
currentPosition += Double(fileInfo.compressed_size)
let fileNameSize = Int(fileInfo.size_filename) + 1
let fileName = UnsafeMutablePointer<CChar>.alloc(fileNameSize)
if fileName == nil {
throw ZipError.UnzipFail
}
unzGetCurrentFileInfo64(zip, &fileInfo, fileName, UInt(fileNameSize), nil, 0, nil, 0)
fileName[Int(fileInfo.size_filename)] = 0
guard var pathString = String(CString: fileName, encoding: NSUTF8StringEncoding) else {
throw ZipError.UnzipFail
}
var isDirectory = false
let fileInfoSizeFileName = Int(fileInfo.size_filename-1)
if (fileName[fileInfoSizeFileName] == "/".cStringUsingEncoding(NSUTF8StringEncoding)?.first || fileName[fileInfoSizeFileName] == "\\".cStringUsingEncoding(NSUTF8StringEncoding)?.first) {
isDirectory = true;
}
free(fileName)
if pathString.rangeOfCharacterFromSet(NSCharacterSet(charactersInString: "/\\")) != nil {
pathString = pathString.stringByReplacingOccurrencesOfString("\\", withString: "/")
}
guard let fullPath = destination.URLByAppendingPathComponent(pathString).path else {
throw ZipError.UnzipFail
}
let creationDate = NSDate()
let directoryAttributes = [NSFileCreationDate: creationDate, NSFileModificationDate: creationDate]
do {
if isDirectory {
try fileManager.createDirectoryAtPath(fullPath, withIntermediateDirectories: true, attributes: directoryAttributes)
}
else {
try fileManager.createDirectoryAtPath(destinationPath, withIntermediateDirectories: true, attributes: directoryAttributes)
}
} catch {}
if fileManager.fileExistsAtPath(fullPath) && !isDirectory && !overwrite {
unzCloseCurrentFile(zip)
ret = unzGoToNextFile(zip)
}
var filePointer: UnsafeMutablePointer<FILE>
filePointer = fopen(fullPath, "wb")
while filePointer != nil {
let readBytes = unzReadCurrentFile(zip, &buffer, bufferSize)
if readBytes > 0 {
fwrite(buffer, Int(readBytes), 1, filePointer)
}
else {
break
}
}
fclose(filePointer)
crc_ret = unzCloseCurrentFile(zip)
if crc_ret == UNZ_CRCERROR {
throw ZipError.UnzipFail
}
ret = unzGoToNextFile(zip)
// Update progress handler
if let progressHandler = progress{
progressHandler(progress: (currentPosition/totalSize))
}
} while (ret == UNZ_OK && ret != UNZ_END_OF_LIST_OF_FILE)
// Completed. Update progress handler.
if let progressHandler = progress{
progressHandler(progress: 1.0)
}
}
// MARK: Zip
/**
Zip files.
- parameter paths: Array of NSURL filepaths.
- parameter zipFilePath: Destination NSURL, should lead to a .zip filepath.
- parameter password: Password string. Optional.
- parameter progress: A progress closure called after unzipping each file in the archive. Double value betweem 0 and 1.
- throws: Error if zipping fails.
*/
public class func zipFiles(paths: [NSURL], zipFilePath: NSURL, password: String?, progress: ((progress: Double) -> ())?) throws {
// File manager
let fileManager = NSFileManager.defaultManager()
// Check whether a zip file exists at path.
guard let destinationPath = zipFilePath.path else {
throw ZipError.FileNotFound
}
// Process zip paths
let processedPaths = ZipUtilities().processZipPaths(paths)
// Zip set up
let chunkSize: Int = 16384
// Progress handler set up
var currentPosition: Double = 0.0
var totalSize: Double = 0.0
// Get totalSize for progress handler
for path in processedPaths {
do {
let filePath = path.filePath()
let fileAttributes = try fileManager.attributesOfItemAtPath(filePath)
let fileSize = fileAttributes[NSFileSize] as? Double
if let fileSize = fileSize {
totalSize += fileSize
}
}
catch {}
}
// Begin Zipping
let zip = zipOpen(destinationPath, APPEND_STATUS_CREATE)
for path in processedPaths {
let filePath = path.filePath()
var isDirectory: ObjCBool = false
fileManager.fileExistsAtPath(filePath, isDirectory: &isDirectory)
if !isDirectory {
let input = fopen(filePath, "r")
if input == nil {
throw ZipError.ZipFail
}
let fileName = path.fileName
var zipInfo: zip_fileinfo = zip_fileinfo(tmz_date: tm_zip(tm_sec: 0, tm_min: 0, tm_hour: 0, tm_mday: 0, tm_mon: 0, tm_year: 0), dosDate: 0, internal_fa: 0, external_fa: 0)
do {
let fileAttributes = try fileManager.attributesOfItemAtPath(filePath)
if let fileDate = fileAttributes[NSFileModificationDate] as? NSDate {
let components = NSCalendar.currentCalendar().components([.Year, .Month, .Day, .Hour, .Minute, .Second], fromDate: fileDate)
zipInfo.tmz_date.tm_sec = UInt32(components.second)
zipInfo.tmz_date.tm_min = UInt32(components.minute)
zipInfo.tmz_date.tm_hour = UInt32(components.hour)
zipInfo.tmz_date.tm_mday = UInt32(components.day)
zipInfo.tmz_date.tm_mon = UInt32(components.month) - 1
zipInfo.tmz_date.tm_year = UInt32(components.year)
}
if let fileSize = fileAttributes[NSFileSize] as? Double {
currentPosition += fileSize
}
}
catch {}
let buffer = malloc(chunkSize)
if let password = password, let fileName = fileName {
zipOpenNewFileInZip3(zip, fileName, &zipInfo, nil, 0, nil, 0, nil,Z_DEFLATED, Z_DEFAULT_COMPRESSION, 0, -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, password, 0)
}
else if let fileName = fileName {
zipOpenNewFileInZip3(zip, fileName, &zipInfo, nil, 0, nil, 0, nil,Z_DEFLATED, Z_DEFAULT_COMPRESSION, 0, -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, nil, 0)
}
else {
throw ZipError.ZipFail
}
var length: Int = 0
while (feof(input) == 0) {
length = fread(buffer, 1, chunkSize, input)
zipWriteInFileInZip(zip, buffer, UInt32(length))
}
// Update progress handler
if let progressHandler = progress{
progressHandler(progress: (currentPosition/totalSize))
}
zipCloseFileInZip(zip)
free(buffer)
fclose(input)
}
}
zipClose(zip, nil)
// Completed. Update progress handler.
if let progressHandler = progress{
progressHandler(progress: 1.0)
}
}
}