# FileHandle

Read file in chunks from document directory

# Read file from document directory in chunks

I get the file path from document directory and read that file in chunks of 1024 and save (append) to NSMutableData object or you can directly write to socket.

// MARK: - Get file data as chunks Methode.
func getFileDataInChunks() {
    let doumentDirectoryPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString
    let filePath = doumentDirectoryPath.appendingPathComponent("video.mp4")
    //Check file exits at path or not.
    if FileManager.default.fileExists(atPath: filePath) {
        let chunkSize = 1024 // divide data into 1 kb
        //Create NSMutableData object to save read data.
        let ReadData = NSMutableData()
        do {
            //open file for reading.
            outputFileHandle = try FileHandle(forReadingFrom: URL(fileURLWithPath: filePath))
            // get the first chunk
            var datas = outputFileHandle?.readData(ofLength: chunkSize)
            //check next chunk is empty or not.
            while !(datas?.isEmpty)! {
                //here I write chunk data to ReadData or you can directly write to socket.
                // get the next chunk
                datas = outputFileHandle?.readData(ofLength: chunkSize)
                print("Running: \(ReadData.length)")
            //close outputFileHandle after reading data complete.
            print("File reading complete")
        }catch let error as NSError {
            print("Error : \(error.localizedDescription)")

After file reading complete you will get file Data in ReadData variable Here outputFileHandle is a object of FileHandle

var outputFileHandle:FileHandle?