224 lines
8.7 KiB
C#
224 lines
8.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Web;
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namespace HTML5Uploader
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{
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/// <summary>
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/// Handler1 的摘要说明
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/// </summary>
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public class Handler1 : Html5Uploader.FilesUploadHandler
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{
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//object LockObject = new object();
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//static List<byte[]> Data;
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//public void ProcessRequest(HttpContext context)
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//{
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// ////bool sliced;
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// ////bool.TryParse(context.Request.Form["sliced"], out sliced);
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// ////var files = context.Request.Files;
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// ////if (files != null && files.Count > 0)
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// ////{
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// //// var file = files[0];
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// //// string name =sliced? Path.GetFileName(file.FileName):context.Request.Form["name"], tempFilePath = context.Server.MapPath("~/" + name);
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// //// if (sliced)
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// //// {
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// //// byte[] buffer = new byte[file.InputStream.Length];
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// //// file.InputStream.Read(buffer, 0, buffer.Length);
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// //// using (BinaryWriter bw = new BinaryWriter(new FileStream(tempFilePath, FileMode.Append, FileAccess.Write, FileShare.ReadWrite)))
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// //// {
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// //// bw.Write(buffer, 0, buffer.Length);
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// //// bw.Flush();
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// //// }
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// //// }
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// //// else {
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// //// }
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// ////}
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// context.Response.Write("{index:100,key:'" + Guid.NewGuid() + "'}");
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//}
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////void v2()
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////{
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//// //var files = context.Request.Files;
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//// //if (files != null && files.Count > 0)
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//// //{
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//// // long count;
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//// // int index;
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//// // long.TryParse(context.Request.Form["count"], out count);
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//// // int.TryParse(context.Request.Form["index"], out index);
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//// // lock (LockObject)
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//// // {
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//// // if (Data == null)
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//// // {
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//// // Data = new List<byte[]>(new byte[count][]);
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//// // }
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//// // }
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//// // var file = files[0];
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//// // byte[] buffer = new byte[file.InputStream.Length];
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//// // file.InputStream.Read(buffer, 0, buffer.Length);
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//// // lock (Data)
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//// // {
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//// // Data[index] = buffer;
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//// // }
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//// // if (index >= count - 1)
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//// // {
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//// // string name = context.Request.Form["name"], tempFilePath = context.Server.MapPath("~/" + name);
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//// // lock (LockObject)
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//// // {
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//// // var arr = Data.ToArray();
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//// // for (int i = 0; i < arr.Length; i++)
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//// // {
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//// // var d = arr[i];
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//// // using (BinaryWriter bw = new BinaryWriter(new FileStream(tempFilePath, FileMode.Append, FileAccess.Write, FileShare.ReadWrite)))
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//// // {
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//// // bw.Write(d, 0, d.Length);
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//// // bw.Flush();
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//// // }
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//// // }
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//// // Data = null;
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//// // }
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//// // }
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//// //}
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////}
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////void temp(HttpContext context)
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////{
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//// string name = context.Request.Form["name"], tempFilePath = context.Server.MapPath("~/" + name);
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//// var files = context.Request.Files;
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//// long loaded, total, position;
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//// long.TryParse(context.Request.Form["loaded"], out loaded);
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//// long.TryParse(context.Request.Form["position"], out position);
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//// if (files != null && files.Count > 0)
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//// {
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//// long.TryParse(context.Request.Form["total"], out total);
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//// FileResumer fr = new FileResumer();
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//// fr.m_FileSize = total;
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//// fr.RangePos = position;
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//// var file = files[0];
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//// loaded += file.InputStream.Length;
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//// fr.Resumer(ref file, tempFilePath);
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//// //using (BinaryWriter bw = new BinaryWriter(new FileStream(tempFilePath, FileMode.Append, FileAccess.Write,FileShare.ReadWrite)))
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//// //{
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//// // using (BinaryReader br = new BinaryReader(files[0].InputStream))
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//// // {
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//// // var arr = new byte[br.BaseStream.Length];
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//// // br.Read(arr, 0, arr.Length);
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//// // bw.Write(arr, 0,arr.Length);
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//// // //var arr = new byte[1024];
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//// // //while (br.Read(arr, 0, arr.Length) > 0)
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//// // //{
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//// // // bw.Write(arr, 0, arr.Length);
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//// // //}
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//// // }
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//// // bw.Flush();
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//// //}
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//// }
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//// context.Response.Write("{loaded:" + loaded + "}");
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//// //context.Response.Write(Convert.ToBase64String(Encoding.UTF8.GetBytes("kkkkkkkk")));
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//// //context.Response.Write(Encoding.UTF8.GetString(Convert.FromBase64String("a2tra2tra2s=")));
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////}
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////async void Write(byte[] data, string tempFilePath)
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////{
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//// long sPosstion;
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//// FileStream FStream;
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//// if (File.Exists(tempFilePath))
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//// {
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//// FStream = File.OpenWrite(tempFilePath);
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//// sPosstion = FStream.Length;
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//// FStream.Seek(sPosstion, SeekOrigin.Current);//移动文件流中的当前指针
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//// }
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//// else
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//// {
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//// FStream = new FileStream(tempFilePath, FileMode.Create);
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//// sPosstion = 0;
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//// }
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//// await FStream.WriteAsync(data, 0, data.Length);
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//// FStream.Close();
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//// FStream.Dispose();
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////}
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}
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/// <summary>
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/// 文件续传类
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/// </summary>
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public class FileResumer
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{
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public long m_FileSize; //文件总大小。
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string m_FileMD5; //
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long m_RangePos; //文件块起始位置
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public long RangePos
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{
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set { this.m_RangePos = value; }
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}
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int m_RangeSize; //文件块大小
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//文件读写锁，防止多个用户同时上传相同文件时，出现创建文件的错误
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static ReaderWriterLock m_writeLock = new ReaderWriterLock();
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public FileResumer()
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{
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}
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/// <summary>
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/// 根据文件大小创建文件。
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/// 注意：多个用户同时上传相同文件时，可能会同时创建相同文件。
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/// </summary>
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public void CreateFile(string filePath)
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{
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//文件不存在则创建
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if (!File.Exists(filePath))
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{
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//创建文件
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//这里存在多个线程同时创建文件的问题。
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FileStream fs = File.OpenWrite(filePath);
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BinaryWriter w = new BinaryWriter(fs);
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for (long i = 0; i < this.m_FileSize; ++i)
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{
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w.Write((byte)0);
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}
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w.Close();
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fs.Close();
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}
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}
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/// <summary>
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/// 续传文件
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/// </summary>
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/// <param name="fileRange">文件块</param>
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/// <param name="fileRemote">远程文件完整路径。d:\www\web\upload\201204\10\md5.exe</param>
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public void Resumer(ref HttpPostedFile fileRange, string fileRemote)
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{
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//存在多个用户同时创建相同文件的问题。
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m_writeLock.AcquireWriterLock(1000);
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this.CreateFile(fileRemote);
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m_writeLock.ReleaseWriterLock();
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//上传的文件大小不为空
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if (fileRange.InputStream.Length > 0)
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{
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//文件已存在，写入数据
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//可能会有多个线程同时写文件。
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FileStream fs = new FileStream(fileRemote, FileMode.Open, FileAccess.Write, FileShare.ReadWrite);
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fs.Seek(this.m_RangePos, SeekOrigin.Begin);
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byte[] ByteArray = new byte[fileRange.InputStream.Length];
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fileRange.InputStream.Read(ByteArray, 0, (int)fileRange.InputStream.Length);
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fs.Write(ByteArray, 0, (int)fileRange.InputStream.Length);
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fs.Flush();
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fs.Close();
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}
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}
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}
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} |