/// <summary>
/// 下载文件方法
/// </summary>
/// <param name="localFilePath"></param>
/// <param name="url"></param>
/// <returns></returns>
public static bool Download(string localFilePath, string url)
{
bool flag = false;
//打开上次下载的文件
long SPosition = 0;
//实例化流对象
FileStream FStream;
//判断要下载的文件夹是否存在
string ParentDirectory = Path.GetDirectoryName(localFilePath);
if (!Directory.Exists(ParentDirectory))
{
Directory.CreateDirectory(ParentDirectory);
}
if (File.Exists(localFilePath))
{
//打开要下载的文件
FStream = File.OpenWrite(localFilePath);
//获取已经下载的长度
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(localFilePath, FileMode.Create);
SPosition = 0;
}
try
{
//打开网络连接
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(url);
long length = myRequest.GetResponse().ContentLength;
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
Stream myStream = myRequest.GetResponse().GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[512];
int intSize = 0;
intSize = myStream.Read(btContent, 0, 512);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 512);
}
//关闭流
FStream.Close();
myStream.Close();
flag = true; //返回true下载成功
}
catch (Exception e)
{
FStream.Close();
flag = false; //返回false下载失败
}
return(flag);
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="strFileName">保存文件的全路径</param>
/// <param name="md5">md5</param>
/// <param name="http">网络地址</param>
/// <param name="callback">回调</param>
/// <returns></returns>
public static bool DownloadFile(string strFileName, string md5, string http, Action <int> callback, Action completed = null)
{
var flag = false;
FileStream FStream = null;
try
{
long SPosition = 0;
if (File.Exists(strFileName))
{
if (md5 == GetFileMd5(strFileName))//如果文件相同
{
return(true);
}
FStream = File.OpenWrite(strFileName);
SPosition = FStream.Length;//断点续传
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
FStream = new FileStream(strFileName, FileMode.Create);
SPosition = 0;
}
var myRequest = (HttpWebRequest)WebRequest.Create(http);
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition);
}
var myStream = myRequest.GetResponse().GetResponseStream();
var btContent = new byte[512];
if (myStream != null)
{
var intSize = myStream.Read(btContent, 0, 512);
while (intSize > 0)
{
callback?.Invoke(intSize);
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 512);
}
FStream.Close();
myStream.Close();
}
flag = true;
}
catch (Exception ex)
{
FStream?.Close();
flag = false;
File.Delete(strFileName);
}
if (flag)
{
completed?.Invoke();
}
return(flag);
}
//移入ZIP类
/// <summary>
/// 从指定站点下载文件，并保存在指定位置,开始位置,完成度(用于ProgressBar使用)
/// </summary>
/// <param name="strFileName">本地物理路径</param>
/// <param name="strUrl">目标Url</param>
public static void DownloadFile(string strFileName, string strUrl, int begin, string flag)
{
if (SafeSC.FileNameCheck(strFileName))
{
throw new Exception(strFileName + "取消保存");
}
//已完成的,1%长度
int CompletedLength = 0;
long percent = 0; progStatus = "0"; string temp = "0";
long sPosstion = 0; //磁盘现盘文件的长度
//long count = 0;// count += sPosstion,从指定位置开始写入字节
FileStream FStream;
if (File.Exists(strFileName)) //如果文件存在
{
FStream = File.OpenWrite(strFileName); //打开继续写入,并从尾部开始,用于断点续传
sPosstion = FStream.Length;
FStream.Seek(sPosstion, SeekOrigin.Current); //移动文件流中的当前指针
}
else
{
FStream = new FileStream(strFileName, FileMode.Create);
sPosstion = 0;
}
//打开网络连接
try
{
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(strUrl);
//if (CompletedLength > 0)
// myRequest.AddRange((int)CompletedLength);//设置Range值,即头，从指定位置开始接收文件..
//向服务器请求，获得服务器的回应数据流
HttpWebResponse webResponse = (HttpWebResponse)myRequest.GetResponse();
long FileLength = webResponse.ContentLength;//文件大小
percent = FileLength / 100;
Stream myStream = webResponse.GetResponseStream();
byte[] btContent = new byte[1024];
//if (count <= 0) count += sPosstion;//
//开始写入
int count = 0;
while ((count = myStream.Read(btContent, 0, 1024)) > 0) //返回读了多少字节,为0表示全部读完
{
FStream.Write(btContent, 0, count); //知道有多少个数字节后再写入
CompletedLength += count;
if (!(CompletedLength / percent).ToString().Equals(temp))
{
temp = (CompletedLength / percent).ToString();
progStatus = temp;
}
}
myStream.Close();
}
finally
{
FStream.Close();
}
}
///
/// 下载文件方法
///
/// 文件保存路径和文件名
/// 返回服务器文件名
///
bool DownloadFile(string DownUrl, string SaveFileName)
{
bool flag = false;
//打开上次下载的文件
long SPosition = 0;
//实例化流对象
FileStream FStream;
//判断要下载的文件夹是否存在
if (File.Exists(SaveFileName))
{
//打开要下载的文件
FStream = File.OpenWrite(SaveFileName);
//获取已经下载的长度
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(SaveFileName, FileMode.Create);
SPosition = 0;
}
try
{
//打开网络连接
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(DownUrl);
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
Stream myStream = myRequest.GetResponse().GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[512];
int intSize = 0;
intSize = myStream.Read(btContent, 0, 512);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 512);
}
//关闭流
FStream.Close();
myStream.Close();
flag = true; //返回true下载成功
}
catch (Exception)
{
FStream.Close();
flag = false; //返回false下载失败
}
return(flag);
}
/// <summary>
/// 以断点续传方式下载文件
/// </summary>
/// <param name="strFileName">下载文件的保存路径</param>
/// <param name="strUrl">文件下载地址</param>
public static void DownloadFile(string strUrl)
{
var strFileName = AppDomain.CurrentDomain.BaseDirectory + @"DownloadGeam\" + strUrl.Substring(strUrl.LastIndexOf("/") + 1);
float percent = 0;
//打开上次下载的文件或新建文件
long SPosition = 0;
FileStream FStream;
if (File.Exists(strFileName))
{
FStream = File.OpenWrite(strFileName);
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);//移动文件流中的当前指针
}
else
{
FStream = new FileStream(strFileName, FileMode.Create);
SPosition = 0;
}
//打开网络连接
try
{
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(strUrl);
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition);//设置Range值
}
long totalBytes = myRequest.ContentLength;
//向服务器请求，获得服务器的回应数据流
Stream myStream = myRequest.GetResponse().GetResponseStream();
byte[] btContent = new byte[1024];
int intSize = 0;
long totalDownloadedByte = 0;
intSize = myStream.Read(btContent, 0, 1024);
while (intSize > 0)
{
totalDownloadedByte = intSize + totalDownloadedByte;
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 1024);
percent = totalDownloadedByte / (float)totalBytes * 100;
}
FStream.Close();
myStream.Close();
}
catch (Exception ex)
{
FStream.Close();
}
}
/// <summary>
/// 以断点续传方式下载文件
/// </summary>
/// <param name="strFileName">下载文件的保存路径</param>
/// <param name="strUrl">文件下载地址</param>
public void DownloadFile(string strFileName, string strUrl)
{
//打开上次下载的文件或新建文件
int CompletedLength = 0;//记录已完成的大小
FileStream FStream;
if (File.Exists(strFileName))
{
FStream = File.OpenWrite(strFileName);
sPosstion = FStream.Length;
FStream.Seek(sPosstion, SeekOrigin.Current);//移动文件流中的当前指针
}
else
{
FStream = new FileStream(strFileName, FileMode.Create);
sPosstion = 0;
}
//打开网络连接
try
{
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(strUrl);
if (CompletedLength > 0)
{
myRequest.AddRange((int)CompletedLength);//设置Range值
}
//向服务器请求，获得服务器的回应数据流
HttpWebResponse webResponse = (HttpWebResponse)myRequest.GetResponse();
FileLength = webResponse.ContentLength;//文件大小
Stream myStream = webResponse.GetResponseStream();
byte[] btContent = new byte[1024];
if (count <= 0)
{
count += sPosstion;
}
while ((CompletedLength = myStream.Read(btContent, 0, 1024)) > 0)
{
FStream.Write(btContent, 0, CompletedLength);
count += CompletedLength;
}
FStream.Close();
myStream.Close();
MessageBox.Show("文件下载完成！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch
{
FStream.Close();
}
}
/// <summary>
/// 以断点续传方式下载文件
/// </summary>
/// <param name="strFileName">下载文件的保存路径</param>
/// <param name="strUrl">文件下载地址</param>
public void DownloadFile(string strFileName, string strUrl)
{
//打开上次下载的文件或新建文件
long SPosition = 0;
FileStream FStream;
if (File.Exists(strFileName))
{
FStream = File.OpenWrite(strFileName);
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);//移动文件流中的当前指针
}
else
{
FStream = new FileStream(strFileName, FileMode.Create);
SPosition = 0;
}
//打开网络连接
try
{
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(strUrl);
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition);//设置Range值
}
//向服务器请求，获得服务器的回应数据流
Stream myStream = myRequest.GetResponse().GetResponseStream();
byte[] btContent = new byte[512];
int intSize = 0;
intSize = myStream.Read(btContent, 0, 512);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 512);
}
FStream.Close();
myStream.Close();
MessageBox.Show("文件下载完成！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch
{
FStream.Close();
}
}
public static bool Download(string sourceFile, string desFile)
{
bool flag = false;
long SPosition = 0;
FileStream FStream = null;
Stream myStream = null;
string fileName = sourceFile.Substring(sourceFile.LastIndexOf(@"/") + 1);
if (desFile.EndsWith("\\"))
{
desFile = desFile + fileName;
}
else
{
desFile = desFile + "\\" + fileName;
}
try
{
long serverFileLength = 0;
//判断要下载的文件夹是否存在
if (File.Exists(desFile))
{
//打开上次下载的文件
FStream = File.OpenWrite(desFile);
//获取已经下载的长度
SPosition = FStream.Length;
serverFileLength = GetHttpLength(sourceFile);
if (SPosition == serverFileLength)
{//文件是完整的，直接结束下载任务
return(true);
}
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(desFile, FileMode.Create);
SPosition = 0;
}
//打开网络连接
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(sourceFile);
if (SPosition > 0)
{
myRequest.AddRange(SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
myStream = myRequest.GetResponse().GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[512];
int intSize = 0;
intSize = myStream.Read(btContent, 0, 512);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 512);
}
flag = true; //返回true下载成功
}
catch (Exception ex)
{
System.Console.WriteLine("下载文件时异常：" + ex.Message + ex.StackTrace);
}
finally
{
//关闭流
if (myStream != null)
{
myStream.Close();
myStream.Dispose();
}
if (FStream != null)
{
FStream.Close();
FStream.Dispose();
}
}
return(flag);
}
/// <summary>
/// 从指定服务器上下载文件,支持断点续传
/// </summary>
/// <param name="url">目标Url</param>
/// <param name="vpath">本地虚拟路径</param>
/// <param name="begin">开始位置,默认为0</param>
public void DownFile(string url, string vpath, int begin = 0)
{
vpath = SafeSC.PathDeal(vpath);
if (SafeSC.FileNameCheck(vpath))
{
throw new Exception("不支持下载[" + Path.GetFileName(vpath) + "]文件");
}
string ppath = function.VToP(vpath);
//已完成的,1%长度
int CompletedLength = 0;
long percent = 0; string temp = "0";
long sPosstion = 0;//磁盘现盘文件的长度
//long count = 0;// count += sPosstion,从指定位置开始写入字节
FileStream FStream;
if (File.Exists(ppath))
{
FStream = File.OpenWrite(ppath); //打开继续写入,并从尾部开始,用于断点续传(如果不需要,则应该删除其)
sPosstion = FStream.Length;
FStream.Seek(sPosstion, SeekOrigin.Current); //移动文件流中的当前指针
}
else
{
string dir = Path.GetDirectoryName(ppath);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
FStream = new FileStream(ppath, FileMode.Create);
sPosstion = 0;
}
//打开网络连接
try
{
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(url);
//if (CompletedLength > 0)
// myRequest.AddRange((int)CompletedLength);//设置Range值,即头，从指定位置开始接收文件..
//向服务器请求，获得服务器的回应数据流
HttpWebResponse webResponse = (HttpWebResponse)myRequest.GetResponse();
long FileLength = webResponse.ContentLength;//文件大小
percent = FileLength / 100;
Stream myStream = webResponse.GetResponseStream();
byte[] btContent = new byte[1024];
//if (count <= 0) count += sPosstion;//
//开始写入
int count = 0;
while ((count = myStream.Read(btContent, 0, 1024)) > 0) //返回读了多少字节,为0表示全部读完
{
FStream.Write(btContent, 0, count); //知道有多少个数字节后再写入
CompletedLength += count;
if (!(CompletedLength / percent).ToString().Equals(temp))
{
temp = (CompletedLength / percent).ToString();
//progStatus = temp;
}
}
myStream.Close();
}
finally
{
FStream.Close();
}
}
///
/// 下载文件方法 支持断点续传
///
/// 文件保存路径和文件名
/// 服务器文件名
public bool DownloadFile(CookieContainer cookie, string strFileName, string fileUrl)
{
bool flag = false;
//打开上次下载的文件
long SPosition = 0;
//实例化流对象
FileStream FStream;
//判断要下载的文件是否存在
if (File.Exists(strFileName))
{
//打开要下载的文件
FStream = File.OpenWrite(strFileName);
//获取已经下载的长度
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);
//File.Delete(strFileName);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(strFileName, FileMode.Create);
SPosition = 0;
}
HttpWebRequest myRequest = null;
HttpWebResponse myResponse = null;
try
{
//打开网络连接
myRequest = (HttpWebRequest)HttpWebRequest.Create(GetUrl(fileUrl));
//myRequest.AllowAutoRedirect = true;
myRequest.CookieContainer = cookie;
//OnDownloadProgress(SPosition, total ,strFileName );
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
myResponse = myRequest.GetResponse() as HttpWebResponse;
//myResponse.Headers.Add("content-reanghe", SPosition.ToString() );
long total = myResponse.ContentLength;
Stream myStream = myResponse.GetResponseStream();
//定义一个字节数据
int bufflength = 1024;
byte[] btContent = new byte[bufflength];
int intSize = 0;
intSize = myStream.Read(btContent, 0, bufflength);
SPosition += intSize;
OnDownloadProgress(SPosition, total, strFileName);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, bufflength);
SPosition += intSize;
OnDownloadProgress(SPosition, total, strFileName);
}
myStream.Close();
flag = true; //返回true下载成功
OnDownloadCompleted(null, true, null);
}
catch (Exception ex)
{
flag = false; //返回false下载失败
OnDownloadCompleted(ex, false, strFileName);
}
finally
{
//关闭流
if (FStream != null)
{
FStream.Close();
FStream = null;
}
if (myResponse != null)
{
myResponse.Close();
myResponse = null;
}
if (myRequest != null)
{
myRequest.Abort();
myRequest = null;
}
}
return(flag);
}
//Html必须编码后再传输,html默认的是将其UrlEncode后传递,服务端再编辑,直接传是不能的
//public M_Http_Result UploadParam(string url, Dictionary<string, object> postParameters)
//{
// HttpMultipartFormRequest req = new HttpMultipartFormRequest();
// //req.config = config;
// M_Http_Result result = new M_Http_Result();
// result = req.AsyncHttpRequest(url, postParameters, null);
// return result;
//}
#endregion
#region 文件下载
/// <summary>
/// 从指定服务器上下载文件,支持断点续传
/// </summary>
/// <param name="url">目标Url</param>
/// <param name="vpath">本地虚拟路径</param>
/// <param name="begin">开始位置,默认为0</param>
public static void DownFile(string url, string vpath, int begin = 0)
{
//尝试除以0,原因:下载的文字过小,占用字节为0
vpath = SafeSC.PathDeal(vpath);
if (SafeSC.FileNameCheck(vpath))
{
throw new Exception("不支持下载[" + Path.GetFileName(vpath) + "]文件");
}
string ppath = function.VToP(vpath);
//long percent = 0;
long sPosstion = 0;//磁盘现盘文件的长度
//long count = 0;// count += sPosstion,从指定位置开始写入字节
FileStream FStream;
if (File.Exists(ppath))
{
FStream = File.OpenWrite(ppath); //打开继续写入,并从尾部开始,用于断点续传(如果不需要,则应该删除其)
sPosstion = FStream.Length;
FStream.Seek(sPosstion, SeekOrigin.Current); //移动文件流中的当前指针
}
else
{
string dir = Path.GetDirectoryName(ppath);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
try { FStream = new FileStream(ppath, FileMode.Create); }
catch (Exception ex) { throw new Exception(ex.Message + "||" + ppath); }
sPosstion = 0;
}
//打开网络连接
Stream myStream = null;
try
{
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(url);
//if (CompletedLength > 0)
// myRequest.AddRange((int)CompletedLength);//设置Range值,即头，从指定位置开始接收文件..
//向服务器请求，获得服务器的回应数据流
HttpWebResponse webResponse = (HttpWebResponse)myRequest.GetResponse();
//long FileLength = webResponse.ContentLength;//文件大小
//percent = FileLength / 100;
myStream = webResponse.GetResponseStream();
byte[] btContent = new byte[1024];
//开始写入
int count = 0;
while ((count = myStream.Read(btContent, 0, 1024)) > 0) //返回读了多少字节,为0表示全部读完
{
FStream.Write(btContent, 0, count); //知道有多少个数字节后再写入
}
}
catch (Exception ex)
{
if (!ex.Message.Contains("基础连接已经关闭"))
{
throw new Exception("DownFile:" + ex.Message + "|" + url);
}
}
finally
{
if (myStream != null)
{
myStream.Close();
}
if (FStream != null)
{
FStream.Close();
}
}
}
void SocketManager_BinaryInput(byte[] data)
{
ReadBytesV2 read = new ReadBytesV2(data);
int lengt;
int cmd;
if (read.ReadInt32(out lengt) && lengt == read.Length && read.ReadInt32(out cmd))
{
switch (cmd)
{
case 2001:
{
long Key;
if (read.ReadInt64(out Key))
{
if (Key == down.DownKey)
{
string msg;
if (read.ReadString(out msg))
{
this.BeginInvoke(new EventHandler((a, b) =>
{
MessageBox.Show(msg);
this.Close();
}));
}
}
}
}
break;
case 2002:
{
long Key;
if (read.ReadInt64(out Key))
{
if (Key == down.DownKey)
{
long startp;
long endp;
byte[] buff;
if (read.ReadInt64(out startp) && read.ReadInt64(out endp) && read.ReadByteArray(out buff))
{
System.Threading.ThreadPool.QueueUserWorkItem((a) =>
{
CheckB cb = IsCheckTable.Find(p => p.StartPostion == startp);
if (cb != null)
{
if (cb.EndPostion == endp && buff.Length >= cb.Size)
{
cb.Checkd = true;
FStream.Position = cb.StartPostion;
FStream.Write(buff, 0, cb.Size);
SizeR += cb.Size;
this.BeginInvoke(new EventHandler((a1, b1) =>
{
ProcessValue++;
if (ProcessValue <= this.progressBar1.Maximum)
{
this.progressBar1.Value = ProcessValue;
}
else
{
this.progressBar1.Value = this.progressBar1.Maximum;
}
this.label1.Text = Math.Round(((double)SizeR / 1024 / 1024), 2) + "MB /" + Math.Round((double)down.Size / 1024 / 1024, 2) + "MB";
}));
}
}
else
{
this.BeginInvoke(new EventHandler((a1, b1) =>
{
BufferFormatV2 bufff = new BufferFormatV2((int)PackType.DownClose);
bufff.AddItem(down.DownKey);
SocketManager.Send(bufff.Finish());
MessageBox.Show("数据验证出错??");
Close();
}));
}
});
}
}
}
}
break;
case 2003:
{
long Key;
if (read.ReadInt64(out Key))
{
if (Key == down.DownKey)
{
this.BeginInvoke(new EventHandler((a, b) =>
{
CheckDown();
}));
}
}
}
break;
case 2004:
{
long Key;
if (read.ReadInt64(out Key))
{
if (Key == down.DownKey)
{
long startP;
byte[] xdata;
if (read.ReadInt64(out startP) && read.ReadByteArray(out xdata))
{
this.BeginInvoke(new EventHandler((a, b) =>
{
CheckB cb = IsCheckTable.Find(p => p.StartPostion == startP);
if (xdata.Length >= cb.Size)
{
cb.Checkd = true;
FStream.Position = cb.StartPostion;
FStream.Write(xdata, 0, cb.Size);
SizeR += cb.Size;
this.BeginInvoke(new EventHandler((a1, b1) =>
{
ProcessValue++;
this.progressBar1.Value = ProcessValue;
this.label1.Text = Math.Round(((double)SizeR / 1024 / 1024), 2) + "MB /" + Math.Round((double)down.Size / 1024 / 1024, 2) + "MB";
}));
}
CheckDown();
}));
}
}
}
}
break;
}
}
}
//通过HTTP下载文件
public static bool DownloadFile(string url, string localFileName)
{
bool flag = false;
//打开上次下载的文件
long SPosition = 0;
//实例化流对象
FileStream FStream;
//判断要下载的文件夹是否存在
if (File.Exists(localFileName))
{
//打开要下载的文件
FStream = File.OpenWrite(localFileName);
//获取已经下载的长度
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(localFileName, FileMode.Create);
SPosition = 0;
}
try
{
//打开网络连接
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(url);
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
myRequest.ProtocolVersion = HttpVersion.Version11;
myRequest.UserAgent = DefaultUserAgent;
}
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
WebResponse response = (HttpWebResponse)myRequest.GetResponse();
Stream myStream = response.GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[512];
int intSize = 0;
intSize = myStream.Read(btContent, 0, 512);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 512);
}
//关闭流
FStream.Close();
myStream.Close();
flag = true; //返回true下载成功
}
catch (Exception e)
{
MessageBox.Show(e.Message);
FStream.Close();
flag = false; //返回false下载失败
}
return(flag);
}
/// <summary>
/// 从台账服务器拿db文件http的方式
/// </summary>
/// <param name="infoString"></param>
/// <returns></returns>
public static bool TZDown(string strFileName, string TZdz, string ftplj)
{
//将文件名改一下
strFileName = strFileName + ".wait";
bool flag = false;
//打开上次下载的文件
long SPosition = 0;
//实例化流对象
FileStream FStream;
//判断要下载的文件夹是否存在
if (File.Exists(strFileName))
{
//打开要下载的文件
FStream = File.OpenWrite(strFileName);
//获取已经下载的长度
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(strFileName, FileMode.Create);
SPosition = 0;
}
try
{
//打开网络连接
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(TZdz);
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
Stream myStream = myRequest.GetResponse().GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[1024];
int intSize = 0;
intSize = myStream.Read(btContent, 0, 1024);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 1024);
}
FStream.Flush();
//关闭流
FStream.Close();
myStream.Close();
//将文件名改回来
string tempName = strFileName;
strFileName = strFileName.Substring(0, strFileName.Length - 5);
File.Move(tempName, strFileName);
flag = true; //返回true下载成功
}
catch (Exception ex)
{
PublicMethod.write_state(ftplj + "\\", -1.01);
CYZFramework.Log.CYZLog.writeLog(ex.ToString());
FStream.Close();
flag = false; //返回false下载失败
}
return(flag);
}
public bool Start()
{
if (SavePath == "" || Url == "")
{
return(false);
}
if (!SavePath.EndsWith("\\"))
{
SavePath += "\\";
}
bool flag = false;
long SPosition;
FileStream FStream = null;
Stream myStream = null;
String desFile = SavePath + SaveFile + Suffix;
try
{
//判断要下载的文件夹是否存在
if (File.Exists(desFile))
{
//打开上次下载的文件
FStream = File.OpenWrite(desFile);
//获取已经下载的长度
SPosition = FStream.Length;
long serverFileLength = GetHttpLength(Url);
if (SPosition == serverFileLength)
{//文件是完整的，直接结束下载任务
return(true);
}
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(desFile, FileMode.Create);
SPosition = 0;
}
//打开网络连接
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(Url);
if (SPosition > 0)
{
myRequest.AddRange(SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
myStream = myRequest.GetResponse().GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[512];
int intSize = 0;
intSize = myStream.Read(btContent, 0, 512);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 512);
}
flag = true; //返回true下载成功
}
catch (Exception ex)
{
//下载文件时异常
}
finally
{
//关闭流
if (myStream != null)
{
myStream.Close();
myStream.Dispose();
}
if (FStream != null)
{
FStream.Close();
FStream.Dispose();
}
}
if (flag)
{
File.Move(desFile, SavePath + SaveFile);
}
return(flag);
}
public static bool DownLoad_OffLine(string fileId, string UpLoadFileName, string DownloadFileName, string saveDir,
int upSize,
DataRow drmission)
{
bool flag = false;
string uri = SysParams.FileServer + SysParams.FileServer_tmpFile + "/" + fileId + "/" + UpLoadFileName;
//截取文件名
string fileName = UpLoadFileName;
//构造文件完全限定名,准备将网络流下载为本地文件
string fileFullName = saveDir + DownloadFileName + SysParams.tmpDownLoadName;
//打开上次下载的文件
long SPosition = 0;
//实例化流对象
FileStream FStream;
//判断要下载的文件夹是否存在
if (File.Exists(fileFullName))
{
//打开要下载的文件
FStream = File.OpenWrite(fileFullName);
//获取已经下载的长度
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(fileFullName, FileMode.Create);
SPosition = 0;
}
try
{
//打开网络连接
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(uri);
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
Stream myStream = myRequest.GetResponse().GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[upSize];
int intSize = 0;
intSize = myStream.Read(btContent, 0, upSize);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, upSize);
lock (drmission.Table)//更新已上传量
{
drmission["UploadSize"] = FStream.Length;
}
}
//关闭流
FStream.Close();
myStream.Close();
flag = true; //返回true下载成功
}
catch (Exception)
{
FStream.Close();
flag = false; //返回false下载失败
}
return(flag);
}