Ejemplo n.º 1
0
        /// <summary>
        /// 下载一个文件块,利用该方法可自行实现多线程断点续传
        /// </summary>
        /// <param name="Address">URL 地址</param>
        /// <param name="FileName">保存到本地的路径文件名</param>
        /// <param name="Length">块大小</param>
        public void DownloadFileChunk(string Address, string FileName, int FromPosition, int Length)
        {
            HttpWebResponse hwrp = null;
            string          a    = null;

            try
            {
                //this._FileName = FileName;
                HttpWebRequest hwrq = (HttpWebRequest)WebRequest.Create(this.GetUri(Address));
                //hwrq.Credentials = this.m_credentials;
                hwrq.AddRange(FromPosition);
                hwrp = (HttpWebResponse)hwrq.GetResponse();
                a    = hwrp.Headers["Content-Disposition"];              //attachment
                if (a != null)
                {
                    a = a.Substring(a.LastIndexOf("filename=") + 9);
                }
                else
                {
                    a = FileName;
                }

                byte[] buffer = this.ResponseAsBytes(Address, hwrp, Length, FileName);
                // lock (_SyncLockObject)
                // {
                // this._Bytes += buffer.Length;
                // }
            }
            catch (Exception e)
            {
                ExceptionActions ea = ExceptionActions.Throw;
                if (this.ExceptionOccurrs != null)
                {
                    DownLoadState      x   = new DownLoadState(Address, hwrp.ResponseUri.AbsolutePath, FileName, a, FromPosition, Length);
                    ExceptionEventArgs eea = new ExceptionEventArgs(e, x);
                    ExceptionOccurrs(this, eea);
                    ea = eea.ExceptionAction;
                }

                if (ea == ExceptionActions.Throw)
                {
                    if (!(e is WebException) && !(e is SecurityException))
                    {
                        throw new WebException("net_webclient", e);
                    }
                    throw;
                }
            }
        }
Ejemplo n.º 2
0
        internal byte[] ResponseAsBytes(string RequestURL, WebResponse Response, long Length, string FileName)
        {
            string a   = null;     //AttachmentName
            int    P   = 0;        //整个文件的位置指针
            long   num = 0;

            try
            {
                a = Response.Headers["Content-Disposition"];                 //attachment
                if (a != null)
                {
                    a = a.Substring(a.LastIndexOf("filename=") + 9);
                }

                num = Length;                 //Response.ContentLength;
                bool flag = false;
                if (num == -1)
                {
                    flag = true;
                    num  = 0x0000;                    //6k
                }
                byte[] buffer = new byte[(int)num];


                int p = 0;                 //本块的位置指针

                string s = Response.Headers["Content-Range"];
                if (s != null)
                {
                    s = s.Replace("bytes ", "");
                    s = s.Substring(0, s.IndexOf("-"));
                    P = Convert.Toint(s);
                }
                num = 0;

                Stream S = Response.GetResponseStream();
                do
                {
                    num = S.Read(buffer, num, ((int)num) - num);

                    num += num;
                    if (flag && (num == num))
                    {
                        num += 0x0000;
                        byte[] buffer = new byte[(int)num];
                        Buffer.BlockCopy(buffer, 0, buffer, 0, num);
                        buffer = buffer;
                    }

                    // lock (_SyncLockObject)
                    // {
                    // this._bytes += num;
                    // }
                    if (num > 0)
                    {
                        if (this.DataReceive != null)
                        {
                            byte[] buffer = new byte[num];
                            Buffer.BlockCopy(buffer, p, buffer, 0, buffer.Length);
                            DownLoadState     dls  = new DownLoadState(RequestURL, Response.ResponseUri.AbsolutePath, FileName, a, P, num, buffer);
                            DownLoadEventArgs dlea = new DownLoadEventArgs(dls);
                            //触发事件
                            this.OnDataReceive(dlea);
                            //System.Threading.Thread.Sleep(00);
                        }
                        p += num;                         //本块的位置指针
                        P += num;                         //整个文件的位置指针
                    }
                    else
                    {
                        break;
                    }
                }while (num != 0);

                S.Close();
                S = null;
                if (flag)
                {
                    byte[] buffer = new byte[num];
                    Buffer.BlockCopy(buffer, 0, buffer, 0, num);
                    buffer = buffer;
                }
                return(buffer);
            }
            catch (Exception e)
            {
                ExceptionActions ea = ExceptionActions.Throw;
                if (this.ExceptionOccurrs != null)
                {
                    DownLoadState      x   = new DownLoadState(RequestURL, Response.ResponseUri.AbsolutePath, FileName, a, P, num);
                    ExceptionEventArgs eea = new ExceptionEventArgs(e, x);
                    ExceptionOccurrs(this, eea);
                    ea = eea.ExceptionAction;
                }

                if (ea == ExceptionActions.Throw)
                {
                    if (!(e is WebException) && !(e is SecurityException))
                    {
                        throw new WebException("net_webclient", e);
                    }
                    throw;
                }
                return(null);
            }
        }
Ejemplo n.º 3
0
        /// <summary>
        /// 分块下载文件
        /// </summary>
        /// <param name="Address">URL 地址</param>
        /// <param name="FileName">保存到本地的路径文件名</param>
        /// <param name="ChunksCount">块数,线程数</param>
        public void DownloadFile(string Address, string FileName, int ChunksCount)
        {
            int             p = 0; // position
            int             s = 0; // chunk size
            string          a = null;
            HttpWebRequest  hwrq;
            HttpWebResponse hwrp = null;

            try
            {
                hwrq = (HttpWebRequest)WebRequest.Create(this.GetUri(Address));
                hwrp = (HttpWebResponse)hwrq.GetResponse();
                long L = hwrp.ContentLength;

                hwrq.Credentials = this.m_credentials;

                L = ((L == -1) || (L > 0x7fffffff)) ? ((long)0x7fffffff) : L;                 //Int.MaxValue 该常数的值为 ,7,8,67; 即十六进制的 0x7FFFFFFF

                int l = (int)L;

                this._FileLength = l;

                // 在本地预定空间(竟然在多线程下不用先预定空间)
                // FileStream sw = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
                // sw.Write(new byte[l], 0, l);
                // sw.Close();
                // sw = null;

                bool b = (hwrp.Headers["Accept-Ranges"] != null & hwrp.Headers["Accept-Ranges"] == "bytes");
                a = hwrp.Headers["Content-Disposition"];                 //attachment
                if (a != null)
                {
                    a = a.Substring(a.LastIndexOf("filename=") + 9);
                }
                else
                {
                    a = FileName;
                }

                int ss = s;
                if (b)
                {
                    s = l / ChunksCount;
                    if (s < 0x60)                     //块大小至少为 8 K 字节
                    {
                        s = 0x60;
                    }
                    ss = s;
                    int i = 0;
                    while (l > s)
                    {
                        l -= s;
                        if (l < s)
                        {
                            s += l;
                        }
                        if (i++ > 0)
                        {
                            DownLoadState x = new DownLoadState(Address, hwrp.ResponseUri.AbsolutePath, FileName, a, p, s, new ThreadCallbackHandler(this.DownloadFileChunk));
                            // 单线程下载
                            // x.StartDownloadFileChunk();

                            //多线程下载
                            //Thread t =
                            new Thread(new ThreadStart(x.StartDownloadFileChunk)).Start();
                            //t.Start();
                        }
                        p += s;
                    }
                    s = ss;
                    byte[] buffer = this.ResponseAsBytes(Address, hwrp, s, FileName);

                    // lock (_SyncLockObject)
                    // {
                    // this._Bytes += buffer.Length;
                    // }
                }
            }
            catch (Exception e)
            {
                ExceptionActions ea = ExceptionActions.Throw;
                if (this.ExceptionOccurrs != null)
                {
                    DownLoadState      x   = new DownLoadState(Address, hwrp.ResponseUri.AbsolutePath, FileName, a, p, s);
                    ExceptionEventArgs eea = new ExceptionEventArgs(e, x);
                    ExceptionOccurrs(this, eea);
                    ea = eea.ExceptionAction;
                }

                if (ea == ExceptionActions.Throw)
                {
                    if (!(e is WebException) && !(e is SecurityException))
                    {
                        throw new WebException("net_webclient", e);
                    }
                    throw;
                }
            }
        }
Ejemplo n.º 4
0
 internal ExceptionEventArgs(System.Exception e, DownLoadState DownloadState)
 {
     this._Exception     = e;
     this._DownloadState = DownloadState;
 }
Ejemplo n.º 5
0
 public DownLoadEventArgs(DownLoadState DownloadState)
 {
     this._DownloadState = DownloadState;
 }
Ejemplo n.º 6
0
		internal byte[] ResponseAsBytes(string RequestURL, WebResponse Response, long Length, string FileName)
		{
			string a = null; //AttachmentName
			int P = 0; //整个文件的位置指针
			long num = 0;
			try
			{
				a = Response.Headers["Content-Disposition"]; //attachment
				if (a != null)
				{
					a = a.Substring(a.LastIndexOf("filename=") + 9);
				}

				num = Length; //Response.ContentLength;
				bool flag = false;
				if (num == -1)
				{
					flag = true;
					num = 0x0000; //6k
				}
				byte[] buffer = new byte[(int)num];


				int p = 0; //本块的位置指针

				string s = Response.Headers["Content-Range"];
				if (s != null)
				{
					s = s.Replace("bytes ", "");
					s = s.Substring(0, s.IndexOf("-"));
					P = Convert.Toint(s);
				}
				num = 0;

				Stream S = Response.GetResponseStream();
				do
				{
					num = S.Read(buffer, num, ((int)num) - num);

					num += num;
					if (flag && (num == num))
					{
						num += 0x0000;
						byte[] buffer = new byte[(int)num];
						Buffer.BlockCopy(buffer, 0, buffer, 0, num);
						buffer = buffer;
					}

					// lock (_SyncLockObject)
					// {
					// this._bytes += num;
					// }
					if (num > 0)
					{
						if (this.DataReceive != null)
						{
							byte[] buffer = new byte[num];
							Buffer.BlockCopy(buffer, p, buffer, 0, buffer.Length);
							DownLoadState dls = new DownLoadState(RequestURL, Response.ResponseUri.AbsolutePath, FileName, a, P, num, buffer);
							DownLoadEventArgs dlea = new DownLoadEventArgs(dls);
							//触发事件
							this.OnDataReceive(dlea);
							//System.Threading.Thread.Sleep(00);

						}
						p += num; //本块的位置指针
						P += num; //整个文件的位置指针
					}
					else
					{
						break;
					}

				}
				while (num != 0);

				S.Close();
				S = null;
				if (flag)
				{
					byte[] buffer = new byte[num];
					Buffer.BlockCopy(buffer, 0, buffer, 0, num);
					buffer = buffer;
				}
				return buffer;
			}
			catch (Exception e)
			{
				ExceptionActions ea = ExceptionActions.Throw;
				if (this.ExceptionOccurrs != null)
				{
					DownLoadState x = new DownLoadState(RequestURL, Response.ResponseUri.AbsolutePath, FileName, a, P, num);
					ExceptionEventArgs eea = new ExceptionEventArgs(e, x);
					ExceptionOccurrs(this, eea);
					ea = eea.ExceptionAction;
				}

				if (ea == ExceptionActions.Throw)
				{
					if (!(e is WebException) && !(e is SecurityException))
					{
						throw new WebException("net_webclient", e);
					}
					throw;
				}
				return null;
			}
		}
Ejemplo n.º 7
0
		/// <summary>
		/// 下载一个文件块,利用该方法可自行实现多线程断点续传
		/// </summary>
		/// <param name="Address">URL 地址</param>
		/// <param name="FileName">保存到本地的路径文件名</param>
		/// <param name="Length">块大小</param>
		public void DownloadFileChunk(string Address, string FileName, int FromPosition, int Length)
		{
			HttpWebResponse hwrp = null;
			string a = null;
			try
			{
				//this._FileName = FileName;
				HttpWebRequest hwrq = (HttpWebRequest)WebRequest.Create(this.GetUri(Address));
				//hwrq.Credentials = this.m_credentials;
				hwrq.AddRange(FromPosition);
				hwrp = (HttpWebResponse)hwrq.GetResponse();
				a = hwrp.Headers["Content-Disposition"]; //attachment
				if (a != null)
				{
					a = a.Substring(a.LastIndexOf("filename=") + 9);
				}
				else
				{
					a = FileName;
				}

				byte[] buffer = this.ResponseAsBytes(Address, hwrp, Length, FileName);
				// lock (_SyncLockObject)
				// {
				// this._Bytes += buffer.Length;
				// }
			}
			catch (Exception e)
			{
				ExceptionActions ea = ExceptionActions.Throw;
				if (this.ExceptionOccurrs != null)
				{
					DownLoadState x = new DownLoadState(Address, hwrp.ResponseUri.AbsolutePath, FileName, a, FromPosition, Length);
					ExceptionEventArgs eea = new ExceptionEventArgs(e, x);
					ExceptionOccurrs(this, eea);
					ea = eea.ExceptionAction;
				}

				if (ea == ExceptionActions.Throw)
				{
					if (!(e is WebException) && !(e is SecurityException))
					{
						throw new WebException("net_webclient", e);
					}
					throw;
				}
			}
		}
Ejemplo n.º 8
0
		/// <summary>
		/// 分块下载文件
		/// </summary>
		/// <param name="Address">URL 地址</param>
		/// <param name="FileName">保存到本地的路径文件名</param>
		/// <param name="ChunksCount">块数,线程数</param>
		public void DownloadFile(string Address, string FileName, int ChunksCount)
		{
			int p = 0; // position
			int s = 0; // chunk size
			string a = null;
			HttpWebRequest hwrq;
			HttpWebResponse hwrp = null;
			try
			{
				hwrq = (HttpWebRequest)WebRequest.Create(this.GetUri(Address));
				hwrp = (HttpWebResponse)hwrq.GetResponse();
				long L = hwrp.ContentLength;

				hwrq.Credentials = this.m_credentials;

				L = ((L == -1) || (L > 0x7fffffff)) ? ((long)0x7fffffff) : L; //Int.MaxValue 该常数的值为 ,7,8,67; 即十六进制的 0x7FFFFFFF

				int l = (int)L;

				this._FileLength = l;

				// 在本地预定空间(竟然在多线程下不用先预定空间)
				// FileStream sw = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
				// sw.Write(new byte[l], 0, l);
				// sw.Close();
				// sw = null;

				bool b = (hwrp.Headers["Accept-Ranges"] != null & hwrp.Headers["Accept-Ranges"] == "bytes");
				a = hwrp.Headers["Content-Disposition"]; //attachment
				if (a != null)
				{
					a = a.Substring(a.LastIndexOf("filename=") + 9);
				}
				else
				{
					a = FileName;
				}

				int ss = s;
				if (b)
				{
					s = l / ChunksCount;
					if (s < 0x60) //块大小至少为 8 K 字节
					{
						s = 0x60;
					}
					ss = s;
					int i = 0;
					while (l > s)
					{
						l -= s;
						if (l < s)
						{
							s += l;
						}
						if (i++ > 0)
						{
							DownLoadState x = new DownLoadState(Address, hwrp.ResponseUri.AbsolutePath, FileName, a, p, s, new ThreadCallbackHandler(this.DownloadFileChunk));
							// 单线程下载
							// x.StartDownloadFileChunk();

							//多线程下载
							//Thread t = 
							new Thread(new ThreadStart(x.StartDownloadFileChunk)).Start();
							//t.Start();
						}
						p += s;
					}
					s = ss;
					byte[] buffer = this.ResponseAsBytes(Address, hwrp, s, FileName);

					// lock (_SyncLockObject)
					// {
					// this._Bytes += buffer.Length;
					// }
				}
			}
			catch (Exception e)
			{
				ExceptionActions ea = ExceptionActions.Throw;
				if (this.ExceptionOccurrs != null)
				{
					DownLoadState x = new DownLoadState(Address, hwrp.ResponseUri.AbsolutePath, FileName, a, p, s);
					ExceptionEventArgs eea = new ExceptionEventArgs(e, x);
					ExceptionOccurrs(this, eea);
					ea = eea.ExceptionAction;
				}

				if (ea == ExceptionActions.Throw)
				{
					if (!(e is WebException) && !(e is SecurityException))
					{
						throw new WebException("net_webclient", e);
					}
					throw;
				}
			}

		}
Ejemplo n.º 9
0
		public DownLoadEventArgs(DownLoadState DownloadState)
		{
			this._DownloadState = DownloadState;
		}
Ejemplo n.º 10
0
		internal ExceptionEventArgs(System.Exception e, DownLoadState DownloadState)
		{
			this._Exception = e;
			this._DownloadState = DownloadState;
		}