Amazon S3 Sync

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace S3UploadDownload
{
    public partial class FormDownload : Form
    {
        SprightlySoftAWS.S3.Download MyDownload;
        System.ComponentModel.BackgroundWorker DownloadBackgroundWorker;

        public FormDownload()
        {
            InitializeComponent();
        }

        private void FormDownload_Load(object sender, EventArgs e)
        {
            Properties.Settings MySettings = new Properties.Settings();

            TextBoxDownloadBucketName.Text = MySettings.DownloadBucketName;
            TextBoxDownloadKeyName.Text = MySettings.DownloadKeyName;
            TextBoxDownloadFileName.Text = MySettings.DownloadFileName;

            MyDownload = new SprightlySoftAWS.S3.Download();
            MyDownload.ProgressChangedEvent += MyDownload_ProgressChangedEvent;

            DownloadBackgroundWorker = new System.ComponentModel.BackgroundWorker();
            DownloadBackgroundWorker.DoWork += DownloadBackgroundWorker_DoWork;
            DownloadBackgroundWorker.RunWorkerCompleted += DownloadBackgroundWorker_RunWorkerCompleted;

            ProgressBarTransfered.Value = 0;
            LabelBytesTransfered.Text = "0 bytes / 0 bytes";
        }

        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            Properties.Settings MySettings = new Properties.Settings();

            MySettings.DownloadBucketName = TextBoxDownloadBucketName.Text;
            MySettings.DownloadKeyName = TextBoxDownloadKeyName.Text;
            MySettings.DownloadFileName = TextBoxDownloadFileName.Text;

            MySettings.Save();
        }

        private void EnableDisableStart()
        {
            TextBoxDownloadBucketName.Enabled = false;
            TextBoxDownloadKeyName.Enabled = false;
            TextBoxDownloadFileName.Enabled = false;
            ButtonDownloadFile.Enabled = false;

            ButtonAbort.Enabled = true;
            ProgressBarTransfered.Enabled = true;
            LabelBytesTransfered.Enabled = true;

            ProgressBarTransfered.Value = 0;
            LabelBytesTransfered.Text = "0 bytes / 0 bytes";
        }

        private void EnableDisableEnd()
        {
            TextBoxDownloadBucketName.Enabled = true;
            TextBoxDownloadKeyName.Enabled = true;
            TextBoxDownloadFileName.Enabled = true;
            ButtonDownloadFile.Enabled = true;

            ButtonAbort.Enabled = false;
            ProgressBarTransfered.Enabled = false;
            LabelBytesTransfered.Enabled = false;

            ProgressBarTransfered.Value = 0;
            LabelBytesTransfered.Text = "0 bytes / 0 bytes";
        }


        private void ButtonDownloadFile_Click(object sender, EventArgs e)
        {
	        EnableDisableStart();
	
	        if (TextBoxDownloadFileName.Text.Contains("\\") == true && System.IO.Directory.Exists(System.IO.Path.GetDirectoryName(TextBoxDownloadFileName.Text)) == true)
            {
                Properties.Settings MySettings = new Properties.Settings();

                String RequestURL;
                RequestURL = MyDownload.BuildS3RequestURL(true, "s3.amazonaws.com", TextBoxDownloadBucketName.Text, TextBoxDownloadKeyName.Text, "");

                String RequestMethod = "GET";

                Dictionary<String, String> ExtraRequestHeaders = new Dictionary<String, String>();
                ExtraRequestHeaders.Add("x-amz-date", DateTime.UtcNow.ToString("r"));

                String AuthorizationValue;
                AuthorizationValue = MyDownload.GetS3AuthorizationValue(RequestURL, RequestMethod, ExtraRequestHeaders, MySettings.AWSAccessKeyId, MySettings.AWSSecretAccessKey);
                ExtraRequestHeaders.Add("Authorization", AuthorizationValue);

                //Use a hash table to pass parameters to the function in the BackgroundWorker.
                System.Collections.Hashtable DownloadHashTable = new System.Collections.Hashtable();
                DownloadHashTable.Add("RequestURL", RequestURL);
                DownloadHashTable.Add("RequestMethod", RequestMethod);
                DownloadHashTable.Add("ExtraRequestHeaders", ExtraRequestHeaders);
                DownloadHashTable.Add("LocalFileName", TextBoxDownloadFileName.Text);

                
	            //Run the DownloadFile function in a BackgroundWorker process.  Downloading a large
	            //file may take a long time.  Running the process in a BackgroundWorker will prevent
	            //the Window from locking up.
	            DownloadBackgroundWorker.RunWorkerAsync(DownloadHashTable);
            }
	        else
            {
	            EnableDisableEnd();
	            MessageBox.Show("The local file path does not exist.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }


        private void DownloadBackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
        {
            System.Collections.Hashtable DownloadHashTable = e.Argument as System.Collections.Hashtable;

	        //Call the DownloadFile function and set the result.  When the function is complete
	        //the RunWorkerCompleted event will fire.  Use the parameters that were passed in the 
	        //hash table.
            e.Result = MyDownload.DownloadFile(DownloadHashTable["RequestURL"].ToString(), DownloadHashTable["RequestMethod"].ToString(), DownloadHashTable["ExtraRequestHeaders"] as Dictionary<String, String>, DownloadHashTable["LocalFileName"].ToString(), false);
        }


        private void DownloadBackgroundWorker_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e)
        {
            System.Diagnostics.Debug.Print("");
            System.Diagnostics.Debug.Print(MyDownload.LogData);
            System.Diagnostics.Debug.Print("");

            EnableDisableEnd();

            if (Convert.ToBoolean(e.Result) == true)
            {
                MessageBox.Show("Download complete.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else
            {
	            //Delete a partially downloaded file
	            if (System.IO.File.Exists(TextBoxDownloadFileName.Text) == true)
                {
	                System.IO.File.Delete(TextBoxDownloadFileName.Text);
                }
	
	            //Show the error message.
	            String ResponseMessage;
	
	            if (MyDownload.ResponseString == "")
                {
	                ResponseMessage = MyDownload.ErrorDescription;
                }
	            else
                {
	                System.Xml.XmlDocument XmlDoc = new System.Xml.XmlDocument();
                    XmlDoc.LoadXml(MyDownload.ResponseString);
	
	                System.Xml.XmlNode XmlNode;
	                XmlNode = XmlDoc.SelectSingleNode("/Error/Message");
	
	                ResponseMessage = XmlNode.InnerText;
                }

                MessageBox.Show(ResponseMessage, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void ButtonAbort_Click(object sender, EventArgs e)
        {
            MyDownload.Abort();
        }

        private void MyDownload_ProgressChangedEvent()
        {
            if (this.InvokeRequired == true)
            {
                this.BeginInvoke(new MethodInvoker(delegate() { MyDownload_ProgressChangedEvent(); }));
            }
            else
            {
                //Set the progress bar when the ProgressChangedEvent is fired.
                if (MyDownload.BytesTotal > 0)
                {
                    decimal MyDecimal = (Convert.ToDecimal(MyDownload.BytesTransfered) / Convert.ToDecimal(MyDownload.BytesTotal)) * 100;
                    ProgressBarTransfered.Value = Convert.ToInt32(MyDecimal);

                    SprightlySoftAWS.S3.Helper MyHelper = new SprightlySoftAWS.S3.Helper();
                    LabelBytesTransfered.Text = MyHelper.FormatByteSize(MyDownload.BytesTransfered) + " / " + MyHelper.FormatByteSize(MyDownload.BytesTotal);
                }
            }
        }

    }
}