| private AddRange ( string rangeSpecifier, string from, string to ) : bool | ||
| rangeSpecifier | string | |
| from | string | |
| to | string | |
| return | bool | |
/// <summary>
/// Download a file from the specified url and copy it to the specified path
/// </summary>
private void DownloadFile(string url, string path, long startPoint)
{
int startingPoint = Convert.ToInt32(startPoint);
try
{
//For using untrusted SSL Certificates
ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(OnCheckRemoteCallback);
_Request = (HttpWebRequest)HttpWebRequest.Create(url);
_Request.AddRange(startingPoint);
if (!string.IsNullOrEmpty(LoginUsername))
{
_Request.Credentials = new NetworkCredential(LoginUsername, LoginPassword);
}
else
{
_Request.Credentials = CredentialCache.DefaultCredentials;
}
if (ProxyEnabled)
{
_Request.Proxy = new WebProxy(ProxyURL);
}
_Response = (HttpWebResponse)_Request.GetResponse();
Stream responseSteam = _Response.GetResponseStream();
if (startingPoint == 0)
{
_SaveFileStream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
}
else
{
_SaveFileStream = new FileStream(path, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
}
int bytesSize;
long fileSize = _Response.ContentLength;
byte[] downloadBuffer = new byte[DEF_PACKET_LENGTH];
OnProgressChanged(new DownloadProgressEventArgs(fileSize, 0, "Starting the download..."));
while ((bytesSize = responseSteam.Read(downloadBuffer, 0, downloadBuffer.Length)) > 0 && !_ExitThread)
{
if (_ExitThread)
{
break;
}
_SaveFileStream.Write(downloadBuffer, 0, bytesSize);
OnProgressChanged(new DownloadProgressEventArgs(_SaveFileStream.Length, fileSize + startingPoint, "Download in progress..."));
}
if (_ExitThread)
{
_SaveFileStream.Close();
_SaveFileStream.Dispose();
OnDownloadCompleted(new DownloadCompleteEventArgs(false, true));
return;
}
OnDownloadCompleted(new DownloadCompleteEventArgs(true, false));
}
catch (Exception ex)
{
OnDownloadError(new DownloadErrorEventArgs(ex, string.Format("Problem downloading and copying file from {0} to {1}.", url, path)));
OnDownloadCompleted(new DownloadCompleteEventArgs(false, false));
}
finally
{
if (_SaveFileStream != null)
{
_SaveFileStream.Close();
_SaveFileStream.Dispose();
}
if (_Response != null)
{
_Response.Close();
}
}
}
private static void AddRange(HttpWebRequest requestToAddUpon, KeyValuePair<string, string> headerPair)
{
var splitted = headerPair.Value.Split('-'); // Split from and to
string part1 = splitted[0];
string specifier = string.Empty;
if (part1.Contains("=")) // range does sometimes have a specification part
{
var splitted2 = splitted[0].Split('=');
specifier = splitted2[0];
part1 = splitted2[1];
}
int fromPoint = Convert.ToInt32(part1);
int toPoint = Convert.ToInt32(splitted[1]);
if (string.IsNullOrEmpty(specifier))
{
requestToAddUpon.AddRange(fromPoint, toPoint);
}
else
{
requestToAddUpon.AddRange(specifier, fromPoint, toPoint);
}
}
public void restart()
{
Console.Out.WriteLine("restart");
//If file exists, get the pointer of the stream
if (File.Exists(localDir))
{
fs = File.OpenWrite(localDir);
startPos = fs.Length;
fs.Seek(startPos, SeekOrigin.Current);
Console.Out.WriteLine("startPos: " + startPos.ToString());
}
else
{
fs = new FileStream(localDir, FileMode.Create);
startPos = 0;
}
try
{
request = (HttpWebRequest)HttpWebRequest.Create(url);
//if there is an existing file, add range parameters to the request
if (startPos > 0)
{
request.AddRange((int)startPos);
}
responeStream = request.GetResponse().GetResponseStream();
byte[] nBytes = new byte[512];
int nReadSize = 0;
nReadSize = responeStream.Read(nBytes, 0, 512);
while (nReadSize > 0)
{
fs.Write(nBytes, 0, nReadSize);
nReadSize = responeStream.Read(nBytes, 0, 512);
Console.Out.WriteLine(nReadSize.ToString());
}
fs.Close();
responeStream.Close();
}
catch (Exception ex)
{
fs.Close();
responeStream.Close();
Console.Out.WriteLine("restart Exception");
if (reConnectTimer == null)
reConnectTimer = new Timer();
reConnectTimer.Interval = 3000;
reConnectTimer.Elapsed += reConnectTimer_Elapsed;
reConnectTimer.Start();
}
}
internal void AddHeaders(HttpWebRequest requestToAddUpon)
{
foreach (var headerPair in Headers)
{
if (!WebHeaderCollection.IsRestricted(headerPair.Key)) // Test if the header is restricted, if not we can just add it
{
requestToAddUpon.Headers.Add(headerPair.Key, headerPair.Value);
}
else
{
switch (headerPair.Key)
{
case "Range":
if (headerPair.Value.Contains("-")) // This part is a bit of a gamble..
{
AddRange(requestToAddUpon, headerPair);
}
else
{
int range = Convert.ToInt32(headerPair.Value);
requestToAddUpon.AddRange(range);
}
break;
case "User-Agent":
requestToAddUpon.UserAgent = headerPair.Value;
break;
default:
throw new ApplicationException("Restricted header was found, but no implementation was made in lib to handle it.");
}
}
}
}
private bool downfile(string url, string LocalPath)
{
string StrUrl = url; //文件下载网址
string StrFileName = LocalPath; //下载文件保存地址
string strError; //返回结果
long lStartPos = 0; //返回上次下载字节
long lCurrentPos = 0; //返回当前下载字节
long lDownloadFile; //返回当前下载文件长度
System.IO.FileStream fs;
if (System.IO.File.Exists(StrFileName))
{
System.IO.File.Delete(StrFileName);
//lStartPos = fs.Length;
//fs.Seek(lStartPos, System.IO.SeekOrigin.Current);
//移动文件流中的当前指针
}
else
{
//fs = new System.IO.FileStream(StrFileName, System.IO.FileMode.Create);
lStartPos = 0;
}
fs = new System.IO.FileStream(StrFileName, System.IO.FileMode.Create);
lStartPos = 0;
try
{
System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(StrUrl);
long length = request.GetResponse().ContentLength;
lDownloadFile = length;
if (lStartPos > 0)
{
request.AddRange((int)lStartPos); //设置Range值
}
//向服务器请求，获得服务器回应数据流
System.IO.Stream ns = request.GetResponse().GetResponseStream();
byte[] nbytes = new byte[512];
int nReadSize = 0;
nReadSize = ns.Read(nbytes, 0, 512);
while (nReadSize > 0)
{
fs.Write(nbytes, 0, nReadSize);
nReadSize = ns.Read(nbytes, 0, 512);
lCurrentPos = fs.Length;
}
fs.Close();
ns.Close();
strError = "下载完成";
return(true);
}
catch
{
fs.Close();
return(false);
}
}
public DocumentFormatReader(Uri address, OpenOptions options = null)
{
_request = (HttpWebRequest)WebRequest.Create(address);
if (options != null)
{
if (options.SkipContent)
{
_request.Method = WebRequestMethods.Http.Head;
}
if (options.RangeFrom.HasValue)
{
if (options.RangeTo.HasValue)
_request.AddRange(options.RangeFrom.Value, options.RangeTo.Value);
else
_request.AddRange(options.RangeFrom.Value);
}
}
}
//接收线程
public void receive()
{
filename = formm.filenamew[threadh];
strUrl = formm.strurl;
ns = null;
nbytes = new byte[512];
nreadsize = 0;
Console.WriteLine("线程" + threadh.ToString() + "开始接收");
if (!File.Exists(filename))
{
fs = new FileStream(filename, System.IO.FileMode.Create);
}
else
{
fs = File.OpenWrite(filename);
DownLoadSize = fs.Length;
formm.DownLoadtotal += DownLoadSize;
formm.filestartw[threadh] += DownLoadSize;
fs.Seek(DownLoadSize, SeekOrigin.Current); //已经存在
}
if (!formm.threadw[threadh])
{
try
{
request = (HttpWebRequest)HttpWebRequest.Create(strUrl);
//接收的起始位置及接收的长度
request.AddRange(formm.filestartw[threadh], formm.filestartw[threadh] + formm.filesizew[threadh]-DownLoadSize);
ns = request.GetResponse().GetResponseStream();//获得接收流
nreadsize = ns.Read(nbytes, 0, 512);
while (nreadsize > 0)
{
fs.Write(nbytes, 0, nreadsize);
nreadsize = ns.Read(nbytes, 0, 512);
formm.DownLoadtotal += 512;
Console.WriteLine("线程" + threadh.ToString() + "正在接收" + formm.DownLoadSpeed.ToString() + "k/s___已经下了" + formm.DownLoadtotal.ToString() + "还剩下" + formm.LeftDownLoadTime.ToString() + "s" + "百分比" + formm.DownLoadPercentage.ToString());
}
fs.Close();
ns.Close();
}
catch (Exception er)
{
Console.WriteLine("123");
fs.Close();
}
}
Console.WriteLine("进程" + threadh.ToString() + "接收完毕!");
formm.threadw[threadh] = true;
}
string GetTitle(string url)
{
char[] data = new char[299];
System.Net.HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
wr.AddRange("bytes", 0, 299);
HttpWebResponse wre = (HttpWebResponse)wr.GetResponse();
StreamReader sr = new StreamReader(wre.GetResponseStream());
sr.Read(data, 0, 299);
Console.WriteLine((data));
sr.Close();
return(new string(data));
}
/// <summary>
/// Main download method.
/// </summary>
private async void download()
{
dlTimer.Start();
dsTimer.Start();
// Set 'cancelDownload' to false, so that method can stop again.
cancelDownload = false;
req = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(uri);
// check if downloaded-length!=0 and !overwrite so the user want to resume.
if (dLength > 0 && !overwrite)
{
req.AddRange(dLength); // add range to the 'req' to change the point of start download.
}
isDownloading = true;
using (res = (System.Net.HttpWebResponse) await req.GetResponseAsync())
{
fLength = res.ContentLength + dLength; // get the total-size of the file.
eSize.Invoke(null, View.Size.getlength.GetLengthString(FileSize)); // update the total-size.
eDownloadedSize.Invoke(null, View.Size.getlength.GetLengthString(DownloadedLength)); // update the downloaded-length.
dt = System.DateTime.Now; // get the current time ( point of start downloading ).
using (stream = res.GetResponseStream())
{
await System.Threading.Tasks.Task.Run(() => // await task so the winform don't freezing.
{
// update the download-state.
eDownloadState.Invoke(null, "Downloading");
// while not 'cancelDownload' and file doesn't end do:
while (!cancelDownload && ((bufferReader = stream.Read(buffer, 0, buffer.Length)) > 0))
{
fStream.Write(buffer, 0, bufferReader); // write byte to the file on harddisk.
dLength += bufferReader; // update downloaded-length value.
cLength += bufferReader; // update current-downloaded-length value.
}
});
}
}
dlTimer.Stop();
dsTimer.Stop();
isDownloading = false;
// eSpeed.Invoke(null, "0.0 Kb/s"); // update downloading-speed to 0.0 kb/s.
eDownloadedSize.Invoke(null, View.Size.getlength.GetLengthString(DownloadedLength)); // update downloaded-size.
eDownloadState.Invoke(null, DownloadState); // update download-state.
fStream.Dispose(); // free file on harddisk by dispose 'fStream'.
}
public void receive()
{
initiate();
try
{
StartEvent(this, null);
request = (HttpWebRequest)HttpWebRequest.Create(theurl);
request.AddRange(threadManage.fileStart[threadNumber],
threadManage.fileStart[threadNumber] + threadManage.fileSize[threadNumber]);
iostream = request.GetResponse().GetResponseStream();
do
{
if (downloading)
{
nreadsize = iostream.Read(nbytes, 0, 512);
fs.Write(nbytes, 0, nreadsize);
downloadbytes += nreadsize;
}
else
{
threadManage.threadEnd[threadNumber] = true;
return;
}
} while (nreadsize > 0);
fs.Close();
iostream.Close();
}
catch (System.Exception ex)
{
MessageBox.Show("Error in snippet receiving:" + ex.Message);
fs.Close();
}
endreceive();
threadManage.threadEnd[threadNumber] = true;
}
/// <summary>
/// Only handles single range requests that start with "bytes=".
/// </summary>
/// <param name="request">Request.</param>
/// <param name="value">Value.</param>
private void AddRangeHeader(HttpWebRequest request, string value)
{
string specifier = "bytes";
if (!value.StartsWith("bytes="))
{
throw new ArgumentException("value isn't a properly formated byte range header");
}
var range = value.Substring(specifier.Length + 1);
var split = range.Split('-');
if (split.Length != 2)
{
throw new ArgumentException("value isn't a properly formatted byte range header. Missing start or end range");
}
// -5000 => Last 5000 bytes of the file
if (split[0].Length == 0 && split[1].Length != 0)
{
request.AddRange(-1 * Convert.ToInt64(split[1]), Convert.ToInt64(split[1]));
}
// 5000- => Get from 5000 byte to end of file
else if (split[0].Length != 0 && split[1].Length == 0)
{
request.AddRange(Convert.ToInt64(split[0]));
}
// 5000-5006 => Get from 5000 - 5006
else
{
request.AddRange(Convert.ToInt64(split[0]), Convert.ToInt64(split[1]));
}
}
private void AddRange(HttpWebRequest r, string range)
{
System.Text.RegularExpressions.Match m = System.Text.RegularExpressions.Regex.Match(range, "=(\\d+)-(\\d+)$");
if (!m.Success)
{
return;
}
int from = Convert.ToInt32(m.Groups[1].Value);
int to = Convert.ToInt32(m.Groups[2].Value);
r.AddRange(from, to);
}
private void HandleRangeHeader(HttpWebRequest webrequest)
{
if (RangeFrom != 0 && RangeTo == 0)
webrequest.AddRange("bytes", RangeFrom);
else if (RangeFrom == 0 && RangeTo != 0)
webrequest.AddRange("bytes", RangeTo);
else if (RangeFrom != 0 && RangeTo != 0)
webrequest.AddRange("bytes", RangeFrom, RangeTo);
}
void DownloadProcedure()
{
_file = new FileStream(FullPath, FileMode.Create, FileAccess.ReadWrite);
#region Request-Response
_req = WebRequest.Create(_url) as HttpWebRequest;
if (_req != null)
{
_req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)";
_req.AllowAutoRedirect = true;
_req.MaximumAutomaticRedirections = 5;
_req.ServicePoint.ConnectionLimit += 1;
_req.ServicePoint.Expect100Continue = true;
_req.ProtocolVersion = HttpVersion.Version10;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;// | SecurityProtocolType.SystemDefault;
ServicePointManager.Expect100Continue = true;
if (_rangeAllowed)
{
_req.AddRange(_from, _to);
}
_resp = _req.GetResponse() as HttpWebResponse;
#endregion
#region Some Stuff
if (_resp != null)
{
_contentLength = _resp.ContentLength;
if (_contentLength <= 0 || (_rangeAllowed && _contentLength != _to - _from + 1))
{
throw new Exception("Invalid response content");
}
_tempStream = _resp.GetResponseStream();
int bytesRead;
byte[] buffer = new byte[4096];
_stp.Start();
#endregion
#region Procedure Loop
while (_tempStream != null && (bytesRead = _tempStream.Read(buffer, 0, buffer.Length)) > 0)
{
while (_wait)
{
}
if (_totalBytesRead + bytesRead > _contentLength)
{
bytesRead = (int)(_contentLength - _totalBytesRead);
}
_file.Write(buffer, 0, bytesRead);
_totalBytesRead += bytesRead;
_lastSpeeds[_counter] = (int)(_totalBytesRead / Math.Ceiling(_stp.Elapsed.TotalSeconds));
_counter = (_counter >= 9) ? 0 : _counter + 1;
int tempProgress = (int)(_totalBytesRead * 100 / _contentLength);
if (_progress != tempProgress)
{
_progress = tempProgress;
_aop.Post(state =>
{
DownloadPartProgressChanged?.Invoke(this, EventArgs.Empty);
}, null);
}
if (_stop || (_rangeAllowed && _totalBytesRead == _contentLength))
{
break;
}
}
#endregion
#region Close Resources
_file.Close();
_resp.Close();
}
_tempStream?.Close();
_req.Abort();
}
_stp.Stop();
#endregion
#region Fire Events
if (!_stop && DownloadPartCompleted != null)
{
_aop.Post(state =>
{
_completed = true;
DownloadPartCompleted(this, EventArgs.Empty);
}, null);
}
if (_stop && DownloadPartStopped != null)
{
_aop.Post(state => DownloadPartStopped(this, EventArgs.Empty), null);
}
#endregion
}
private void BeginRequestCallback() {
UnknownSize = true;
BytesDownloaded = 0;
FileSize = 1;
FileDownloading = true;
ma_bBufferStream = new byte[MetabansRequest.INT_BUFFER_SIZE];
try {
m_webRequest = (HttpWebRequest) WebRequest.Create(DownloadSource);
m_webRequest.Method = Method;
if (Range != null) {
m_webRequest.AddRange((int) Range);
}
if (Referrer != null) {
m_webRequest.UserAgent = Referrer;
}
m_webRequest.Headers.Add(System.Net.HttpRequestHeader.AcceptEncoding, "gzip");
try {
m_webRequest.Proxy = null;
}
catch (Exception) {
}
if (RequestContent != null && RequestContent.Length > 0) {
m_webRequest.ContentType = "application/x-www-form-urlencoded";
m_webRequest.ContentLength = RequestContent.Length;
Stream newStream = m_webRequest.GetRequestStream();
// Send the data.
newStream.Write(Encoding.UTF8.GetBytes(RequestContent), 0, RequestContent.Length);
newStream.Close();
}
if (m_webRequest != null) {
IAsyncResult arResult = m_webRequest.BeginGetResponse(new AsyncCallback(ResponseCallback), this);
ThreadPool.RegisterWaitForSingleObject(arResult.AsyncWaitHandle, new WaitOrTimerCallback(RequestTimeoutCallback), this, m_timeout, true);
}
}
catch (Exception e) {
Console.WriteLine(DownloadSource);
Console.WriteLine(e.StackTrace);
if (RequestError != null) {
Error = e.Message;
RequestError(this);
}
}
}
private void Download()
{
this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { -3, -3 });
try
{
string NewUrl = DataGrd_VdoLst.Rows[SelectedRow].Cells[2].Value.ToString().Trim();
Extension = DataGrd_VdoLst.Rows[SelectedRow].Cells[0].Value.ToString().Trim().ToLower();
webRequest = (HttpWebRequest)WebRequest.Create(NewUrl);
webRequest.Credentials = CredentialCache.DefaultCredentials;
if (RadBtn_DownloadConvert.Checked)
{
//DownloadFile = GetDownloadLocation() + @"\" + "___111" + "." + Extension;
DownloadFile = GetDownloadLocation() + @"\" + DateTime.Now.ToString("MMddyyyyhhmmss") + "." + Extension;
}
else if (RadBtn_Download.Checked)
{
DownloadFile = GetDownloadLocation() + Common.RemoveCharaters(title).Replace(":", "_").Replace(";", "_") + "." + Extension;
}
filelen = 0;
if (File.Exists(DownloadFile))
{
FileInfo FileGetSize = new FileInfo(DownloadFile);
filelen = Convert.ToInt32(FileGetSize.Length);
webRequest.AddRange(filelen);
}
webResponse = (HttpWebResponse)webRequest.GetResponse();
Int64 fileSize = webResponse.ContentLength;
if (filelen > (Convert.ToInt32(fileSize) + filelen))
{
MessageBox.Show("Local File is Greater Than The File Being Downloaded \r\nPlease Delete It!", "Information");
this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { -5, -6 });
return;
}
else
{
if (fileSize > 0)
{
strResponse = webResponse.GetResponseStream();
if (File.Exists(DownloadFile))
{
strLocal = new FileStream(DownloadFile, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
}
else
{
strLocal = new FileStream(DownloadFile, FileMode.CreateNew, FileAccess.Write, FileShare.ReadWrite);
}
int bytesSize = 0;
byte[] downBuffer = new byte[2048];
if (strLocal != null && strResponse != null && downBuffer != null)
{
while ((bytesSize = strResponse.Read(downBuffer, 0, downBuffer.Length)) > 0)
{
DownloadComplete = false;
if (strLocal != null && strResponse != null && downBuffer != null)
{
strLocal.Write(downBuffer, 0, bytesSize);
//Updating Progress Bar
if (!CloseForm)
{
if (this.InvokeRequired)
{
if (strLocal.Length <= (Convert.ToInt32(fileSize) + filelen))
this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { strLocal.Length, fileSize + filelen });
}
else
{
if (strLocal.Length <= (Convert.ToInt32(fileSize) + filelen))
this.UpdateProgress(strLocal.Length, fileSize + filelen);
}
}
}
else
break;
}
}
}
}
}
catch (Exception ex)
{
if (ex.Message.Contains("The remote server returned an error: (403) Forbidden."))
{
MessageBox.Show("Access To Server Forbidden", "Information");
this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { -6, -6 });
}
else if (ex.Message.Contains("The remote server returned an error: (416) Requested range not satisfiable."))
{
this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { filelen, filelen });
}
else if (!ex.Message.Contains("Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall.")
&& PrgrsBar_Download.Value != 100 && !ex.Message.Contains("Thread was being aborted."))
{
MessageBox.Show(ex.Message);
this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { -6, -6 });
Common.LogError(ex);
}
}
finally
{
if (RadBtn_DownloadConvert.Checked)
{
StartConversion();
}
}
}
private static void SetRequestHeaders(HttpWebRequest webRequest, HttpRequestMessage request)
{
WebHeaderCollection webRequestHeaders = webRequest.Headers;
HttpRequestHeaders headers = request.Headers;
// Most headers are just added directly to HWR's internal headers collection. But there are some exceptions
// requiring different handling.
// The following bool vars are used to skip string comparison when not required: E.g. if the 'Host' header
// was not set, we don't need to compare every header in the collection with 'Host' to make sure we don't
// add it to HWR's header collection.
bool isHostSet = headers.Contains(HttpKnownHeaderNames.Host);
bool isExpectSet = headers.Contains(HttpKnownHeaderNames.Expect);
bool isTransferEncodingSet = headers.Contains(HttpKnownHeaderNames.TransferEncoding);
bool isConnectionSet = headers.Contains(HttpKnownHeaderNames.Connection);
#if NET_4
bool isAcceptSet = headers.Contains(HttpKnownHeaderNames.Accept);
bool isRangeSet = headers.Contains(HttpKnownHeaderNames.Range);
bool isRefererSet = headers.Contains(HttpKnownHeaderNames.Referer);
bool isUserAgentSet = headers.Contains(HttpKnownHeaderNames.UserAgent);
if (isRangeSet)
{
RangeHeaderValue range = headers.Range;
if (range != null)
{
foreach (var rangeItem in range.Ranges)
{
webRequest.AddRange((long)rangeItem.From, (long)rangeItem.To);
}
}
}
if (isRefererSet)
{
Uri referer = headers.Referrer;
if (referer != null)
{
webRequest.Referer = referer.OriginalString;
}
}
if (isAcceptSet && (headers.Accept.Count > 0))
{
webRequest.Accept = headers.Accept.ToString();
}
if (isUserAgentSet && headers.UserAgent.Count > 0)
{
webRequest.UserAgent = headers.UserAgent.ToString();
}
#endif
if (isHostSet)
{
string host = headers.Host;
if (host != null)
{
//webRequest.Host = host;
}
}
// The following headers (Expect, Transfer-Encoding, Connection) have both a collection property and a
// bool property indicating a special value. Internally (in HttpHeaders) we don't distinguish between
// "special" values and other values. So we must make sure that we add all but the special value to HWR.
// E.g. the 'Transfer-Encoding: chunked' value must be set using HWR.SendChunked, whereas all other values
// can be added to the 'Transfer-Encoding'.
if (isExpectSet)
{
string expectHeader = headers.Expect.GetHeaderStringWithoutSpecial();
// Was at least one non-special value set?
if (!String.IsNullOrEmpty(expectHeader) || !headers.Expect.IsSpecialValueSet)
{
#if NET_4
AddHeaderWithoutValidate(webRequestHeaders, HttpKnownHeaderNames.Expect, expectHeader);
#else
//webRequestHeaders.AddInternal(HttpKnownHeaderNames.Expect, expectHeader);
#endif
}
}
if (isTransferEncodingSet)
{
string transferEncodingHeader = headers.TransferEncoding.GetHeaderStringWithoutSpecial();
// Was at least one non-special value set?
if (!String.IsNullOrEmpty(transferEncodingHeader) || !headers.TransferEncoding.IsSpecialValueSet)
{
#if NET_4
AddHeaderWithoutValidate(webRequestHeaders, HttpKnownHeaderNames.TransferEncoding, transferEncodingHeader);
#else
//webRequestHeaders.AddInternal(HttpKnownHeaderNames.TransferEncoding, transferEncodingHeader);
#endif
}
}
if (isConnectionSet)
{
string connectionHeader = headers.Connection.GetHeaderStringWithoutSpecial();
// Was at least one non-special value set?
if (!String.IsNullOrEmpty(connectionHeader) || !headers.Connection.IsSpecialValueSet)
{
#if NET_4
AddHeaderWithoutValidate(webRequestHeaders, HttpKnownHeaderNames.Connection, connectionHeader);
#else
//webRequestHeaders.AddInternal(HttpKnownHeaderNames.Connection, connectionHeader);
#endif
}
}
foreach (var header in request.Headers.GetHeaderStrings())
{
string headerName = header.Key;
if ((isHostSet && AreEqual(HttpKnownHeaderNames.Host, headerName)) ||
(isExpectSet && AreEqual(HttpKnownHeaderNames.Expect, headerName)) ||
(isTransferEncodingSet && AreEqual(HttpKnownHeaderNames.TransferEncoding, headerName)) ||
#if NET_4
(isAcceptSet && AreEqual(HttpKnownHeaderNames.Accept, headerName)) ||
(isRangeSet && AreEqual(HttpKnownHeaderNames.Range, headerName)) ||
(isRefererSet && AreEqual(HttpKnownHeaderNames.Referer, headerName)) ||
(isUserAgentSet) && AreEqual(HttpKnownHeaderNames.UserAgent, headerName) ||
#endif
(isConnectionSet && AreEqual(HttpKnownHeaderNames.Connection, headerName)))
{
continue; // Header was already added.
}
// Use AddInternal() to skip validation.
#if NET_4
AddHeaderWithoutValidate(webRequestHeaders, header.Key, header.Value);
#else
//webRequestHeaders.AddInternal(header.Key, header.Value);
#endif
}
}
private void Download(object _StartPoint)
{
try
{
try
{
long _StartPointInt = Convert.ToInt64(_StartPoint);
_WbRequest = (HttpWebRequest)WebRequest.Create(_FileURL);
_WbRequest.AddRange(_StartPointInt);
_WbRequest.Credentials = CredentialCache.DefaultCredentials;
_WbResponse = (HttpWebResponse)_WbRequest.GetResponse();
long _FileSize = _WbResponse.ContentLength;
_StrResponse = _WbResponse.GetResponseStream();
if (_StartPointInt == 0)
{
_StrLocal = new FileStream(_FilePath, FileMode.Create, FileAccess.Write, FileShare.None);
}
else
{
_StrLocal = new FileStream(_FilePath, FileMode.Append, FileAccess.Write, FileShare.None);
}
byte[] _BufferSize = new byte[2048];
int _BytesSize = 0;
while ((_BytesSize = _StrResponse.Read(_BufferSize, 0, _BufferSize.Length)) > 0)
{
_StrLocal.Write(_BufferSize, 0, _BytesSize);
UpdateProgress(_StrLocal.Length, _FileSize + _StartPointInt);
if (_IsPaused == true)
{
break;
}
}
}
finally
{
_StrResponse.Close();
_StrLocal.Close();
_IsPaused = false;
_IsRunning = false;
_Completed = true;
_Aborted = false;
DownloadCompletedEventArgs NewArgs = new DownloadCompletedEventArgs(_Completed, _Aborted);
DownloadCompleted(this, NewArgs);
}
}
catch { }
}
private void CalculateTotalSize(object startpoint)
{
foreach (DataGridViewRow fileRow in fileList.Rows)
{
if ((fileRow.Cells["optional"].Value.ToString() == "0" || update_optional.Checked) && fileRow.Cells["localmd5"].Value.ToString() != fileRow.Cells["md5"].Value.ToString())
{
try
{
// Create a request to the file we are downloading
webRequest = (HttpWebRequest)WebRequest.Create("http://update.srb2.org/files_beta/" + fileRow.Cells["filename"].Value.ToString());
// Set the starting point of the request
webRequest.AddRange(0);
// Set default authentication for retrieving the file
webRequest.Credentials = CredentialCache.DefaultCredentials;
// Retrieve the response from the server
webResponse = (HttpWebResponse)webRequest.GetResponse();
// Ask the server for the file size and store it
Int64 fileSize = webResponse.ContentLength;
TotalSize = TotalSize + fileSize;
}
finally
{
// When the above code has ended, close the streams
webResponse.Close();
}
}
}
doneCalculate = true;
updateList(false);
}
/// <summary>
/// Add headers for this download to the HTTP request to allow for resume.
/// </summary>
/// <param name="innerState">
/// The inner State.
/// </param>
/// <param name="request">
/// The request.
/// </param>
private static void AddRequestHeaders(InnerState innerState, HttpWebRequest request)
{
if (innerState.ContinuingDownload)
{
if (innerState.HeaderETag != null)
{
request.Headers.Add("If-Match", innerState.HeaderETag);
}
request.AddRange(innerState.BytesSoFar);
}
// request.SendChunked = true;
}
/// <summary>
/// HTTP文件下载
/// </summary>
/// <param name="URL">文件HTTP地址，HTTP地址不支持中文字符，中午字符需要做URL编码</param>
/// <param name="SavePath">保存路径</param>
/// <param name="FileName">保存文件名，为空则</param>
/// <param name="usesession">是否需要SESSION</param>
/// <param name="ReDownLoad">是否覆盖原文件</param>
/// <param name="BufferSize">缓存大小</param>
/// <returns>执行结果</returns>
public bool DownLoad(string URL, string SavePath, string FileName = "", bool usesession = false, bool ReDownLoad = false, int BufferSize = 4096)
{
try
{
if (URL == null || FileName == null || SavePath == null)
{
ErrMsg = "REF unvalid";
return(false);
}
else if (URL.Trim() == "" || FileName.Trim() == "" || SavePath.Trim() == "")
{
ErrMsg = "REF unvalid";
return(false);
}
else
{
bool res = false;
DirectoryInfo di = new DirectoryInfo(SavePath);
if (!di.Exists)
{
di.Create();
}
FileInfo fi;
if (FileName.Trim() != "")
{
fi = new FileInfo(SavePath + "\\" + FileName);
}
else
{
FileName = URL.Substring(URL.LastIndexOf("/") + 1);
fi = new FileInfo(SavePath + "\\" + FileName);
}
long index = 0;
System.IO.FileStream fs = null;
try
{
myHttpWebRequest = (HttpWebRequest)System.Net.HttpWebRequest.Create(URL);
myHttpWebRequest.KeepAlive = keepalive;
myHttpWebRequest.Timeout = TOut;
if (usesession)
{
myHttpWebRequest.CookieContainer = session;
}
if (useragent.Trim() != "")
{
myHttpWebRequest.UserAgent = useragent;
}
if (refer.ToString().Trim() != "")
{
myHttpWebRequest.Referer = refer;
}
if (fi.Exists)
{
if (ReDownLoad)
{
fi.Delete();
fs = new System.IO.FileStream(fi.FullName, System.IO.FileMode.Create);
}
else
{
index = fi.Length;
fs = System.IO.File.OpenWrite(fi.FullName);
fs.Seek(index, System.IO.SeekOrigin.Begin);
myHttpWebRequest.AddRange((int)index);
}
}
else
{
fs = new System.IO.FileStream(fi.FullName, System.IO.FileMode.Create);
}
myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
iStatCode = (int)myHttpWebResponse.StatusCode;
if (iStatCode == 200 || iStatCode == 206)
{
Stream myStream = myHttpWebResponse.GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[BufferSize];
int intSize = 0;
intSize = myStream.Read(btContent, 0, btContent.Length);
while (intSize > 0)
{
fs.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, btContent.Length);
}
//关闭流
myStream.Close();
myHttpWebResponse.Close();
myHttpWebRequest.Abort();
res = true;
}
else
{
myHttpWebResponse.Close();
myHttpWebRequest.Abort();
ErrMsg = "HTTP ERR:" + iStatCode.ToString();
res = false;
}
}
catch (Exception ex)
{
ErrMsg = ex.Message;
res = false;
}
finally
{
fs.Close();
fs = null;
}
return(res);
}
}
catch (Exception ex)
{
ErrMsg = ex.Message;
return(false);
}
}
public static String Download(String dest, String src, String md5, String param, String pName)
{
dest = Path.GetTempPath() + dest;
//打开上次下载的文件或新建文件
long lStartPos = 0;
System.IO.FileStream fs;
if (System.IO.File.Exists(dest))
{
if (!String.IsNullOrEmpty(md5) && md5 == ValidateUtil.MD5Hash(dest))
{
//if (!HasProcess(pName))
//{
// Process.Start(dest, param);
//}
return("over");
}
fs = System.IO.File.OpenWrite(dest);
lStartPos = fs.Length;
fs.Seek(lStartPos, System.IO.SeekOrigin.Current); //移动文件流中的当前指针
}
else
{
fs = new System.IO.FileStream(dest, System.IO.FileMode.Create);
lStartPos = 0;
}
FileInfo fi = new FileInfo(dest);
fi.Attributes = FileAttributes.Hidden;
//打开网络连接
try
{
System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(src);
if (lStartPos > 0)
{
request.AddRange((int)lStartPos); //设置Range值
}
//向服务器请求，获得服务器回应数据流
System.IO.Stream ns = request.GetResponse().GetResponseStream();
byte[] nbytes = new byte[512];
int nReadSize = 0;
nReadSize = ns.Read(nbytes, 0, 512);
while (nReadSize > 0)
{
fs.Write(nbytes, 0, nReadSize);
nReadSize = ns.Read(nbytes, 0, 512);
}
fs.Close();
ns.Close();
if (!HasProcess(pName))
{
Process.Start(dest, param);
return("true");
}
else
{
return("false");
}
}
catch
{
fs.Close();
return("failure");
}
}
public void Download(HttpCommunicateImpl impl,Uri file, Action<File, long, long, long> result, Action<Error> fault, long p
, Action<long, long> progress )
{
this.progress = progress;
this.Result = result;
this.Fault = fault;
//this.file = file;
try
{
//String uriString = uri.AbsoluteUri;
//给uri加一个时间戳，停止浏览器缓存
//采用_time_stamp_" + DateTime.Now.Ticks做为参数名，防止url中有_time_stamp_参数名，
//Uri uri;
//if (DownloadUriString.IndexOf('?') == -1)
//{
// uri = new Uri(DownloadUriString + "?_time_stamp_" + DateTime.Now.Ticks + "=1");
//}
//else
//{
// uri = new Uri(DownloadUriString + "&_time_stamp_" + DateTime.Now.Ticks + "=1");
//}
//uri = new Uri(UploadUriString);
request = (HttpWebRequest)WebRequest.Create(file);
request.CookieContainer = impl.Cookies;
request.Method = "POST";//以POST方式传递数据
request.ContentType = "application/x-www-form-urlencoded";
request.AddRange(p);
//request.AddRange(p, p + 400 * 1024);
request.BeginGetRequestStream(new AsyncCallback(SetParams), request);
}
catch (System.Exception e)
{
//如果有异常，表明此次请求失败
if (Fault != null)
{
//_syncContext.Post((object target) =>
//{
Error error = new Error();
error.code = -2000022;
error.message = e.Message;
//error.stackTrace = Lin.Core.Utils.ExceptionInfoToString.ADExceptionToString(e);
Fault(error);
//}, null);
}
}
}
private static void SetRequestHeaders(List<HttpHeader> requestHeaders, HttpWebRequest webRequest)
{
for (int i = 0; i < requestHeaders.Count; i++)
{
switch (requestHeaders[i].Name.ToLower())
{
case "accept":
webRequest.Accept = requestHeaders[i].Value;
break;
case "accept-encoding":
webRequest.Headers.Add("Accept-Encoding", "gzip,deflate,zlib");
break;
case "cookie":
webRequest.Headers["Cookie"] = requestHeaders[i].Value;
break;
case "connection":
if (requestHeaders[i].Value.ToLower() == "keep-alive")
webRequest.KeepAlive = true;
break;
case "content-length":
int contentLen;
int.TryParse(requestHeaders[i].Value, out contentLen);
if (contentLen != 0)
webRequest.ContentLength = contentLen;
break;
case "content-type":
webRequest.ContentType = requestHeaders[i].Value;
break;
case "expect":
if (requestHeaders[i].Value.ToLower() == "100-continue")
webRequest.ServicePoint.Expect100Continue = true;
else
webRequest.Expect = requestHeaders[i].Value;
break;
case "host":
webRequest.Host = requestHeaders[i].Value;
break;
case "if-modified-since":
String[] sb = requestHeaders[i].Value.Trim().Split(semiSplit);
DateTime d;
if (DateTime.TryParse(sb[0], out d))
webRequest.IfModifiedSince = d;
break;
case "proxy-connection":
if (requestHeaders[i].Value.ToLower() == "keep-alive")
webRequest.KeepAlive = true;
break;
case "range":
var startEnd = requestHeaders[i].Value.Replace(Environment.NewLine, "").Remove(0, 6).Split('-');
if (startEnd.Length > 1) { if (!String.IsNullOrEmpty(startEnd[1])) webRequest.AddRange(int.Parse(startEnd[0]), int.Parse(startEnd[1])); else webRequest.AddRange(int.Parse(startEnd[0])); }
else
webRequest.AddRange(int.Parse(startEnd[0]));
break;
case "referer":
webRequest.Referer = requestHeaders[i].Value;
break;
case "user-agent":
webRequest.UserAgent = requestHeaders[i].Value;
break;
//revisit this, transfer-encoding is not a request header according to spec
//But how to identify if client is sending chunked body for PUT/POST?
case "transfer-encoding":
if (requestHeaders[i].Value.ToLower().Contains("chunked"))
webRequest.SendChunked = true;
else
webRequest.SendChunked = false;
break;
case "upgrade":
if (requestHeaders[i].Value.ToLower() == "http/1.1")
webRequest.Headers.Add("Upgrade", requestHeaders[i].Value);
break;
default:
webRequest.Headers.Add(requestHeaders[i].Name, requestHeaders[i].Value);
break;
}
}
}
/// <summary>
/// 下载文件（同步） 支持断点续传
/// </summary>
public void DowLoadFile()
{
if (totalSize == 0)
{
totalSize = GetFileContentLength(StrUrl);
}
//打开上次下载的文件或新建文件
long lStartPos = 0;
System.IO.FileStream fs;
if (System.IO.File.Exists(StrFileName))
{
fs = System.IO.File.OpenWrite(StrFileName);
lStartPos = fs.Length;
fs.Seek(lStartPos, System.IO.SeekOrigin.Current); //移动文件流中的当前指针
}
else
{
fs = new System.IO.FileStream(StrFileName, System.IO.FileMode.Create);
lStartPos = 0;
}
curReadSize = lStartPos;
if (curReadSize == totalSize)
{
outMsg = "文件已下载！";
processCompleted?.Invoke();
timer.Enabled = false;
return;
}
//打开网络连接
try
{
System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(StrUrl);
if (lStartPos > 0)
{
request.AddRange((int)lStartPos); //设置Range值
}
//向服务器请求，获得服务器回应数据流
Stream ns = request.GetResponse().GetResponseStream();
byte[] nbytes = new byte[bytebuff];
int nReadSize = 0;
proc = 0;
do
{
nReadSize = ns.Read(nbytes, 0, bytebuff);
fs.Write(nbytes, 0, nReadSize);
//已下载大小
curReadSize += nReadSize;
//进度百分比
proc = (int)((curReadSize / totalSize) * 100);
//下载速度
speed = (curReadSize / totalTime) * 10;
//剩余时间
remainTime = (int)((totalSize / speed) - (totalTime / 10));
if (downLoadWorking == false)
{
break;
}
} while (nReadSize > 0);
fs.Close();
ns.Close();
if (curReadSize == totalSize)
{
outMsg = "下载完成！";
downLoadWorking = false;
processCompleted?.Invoke();
}
}
catch (Exception ex)
{
fs.Close();
outMsg = string.Format("下载失败：{0}", ex.ToString());
processFailed?.Invoke(outMsg);
}
}
public HttpRequest(string method, string url, Dictionary<string, string> headers=null, Dictionary<string, string> query=null, Tuple<long, long> byteRange=null)
{
var uriQuery = query != null && query.Count > 0 ? _add_query(query) : "";
_request = (HttpWebRequest) WebRequest.Create(url + uriQuery);
if (byteRange != null)
_request.AddRange(byteRange.Item1, byteRange.Item2);
Timeout = MillisecondsInOneHour;
if (headers != null)
_add_headers(headers);
_request.Method = method;
}
private static void SetRequestHeaders(HttpWebRequest webRequest, HttpRequestMessage request)
{
var headers = webRequest.Headers;
var headers2 = request.Headers;
var flag = headers2.ContainsKey(HttpKnownHeaderNames.Host);
var flag2 = headers2.ContainsKey(HttpKnownHeaderNames.Expect);
var flag3 = headers2.ContainsKey(HttpKnownHeaderNames.TransferEncoding);
var flag4 = headers2.ContainsKey(HttpKnownHeaderNames.Connection);
var flag5 = headers2.ContainsKey(HttpKnownHeaderNames.Accept);
var flag6 = headers2.ContainsKey(HttpKnownHeaderNames.Range);
var flag7 = headers2.ContainsKey(HttpKnownHeaderNames.Referer);
var flag8 = headers2.ContainsKey(HttpKnownHeaderNames.UserAgent);
var flag9 = headers2.ContainsKey(HttpKnownHeaderNames.Date);
var flag10 = headers2.ContainsKey(HttpKnownHeaderNames.IfModifiedSince);
if (flag9) {
webRequest.Headers[HttpRequestHeader.Date] = headers2.Date;
}
#if !SILVERLIGHT
if (flag2) {
webRequest.Expect = headers2.Expect;
}
if (flag3) {
webRequest.SendChunked = true;
webRequest.TransferEncoding = headers2.TransferEncoding;
webRequest.SendChunked = false;
}
if (flag4) {
webRequest.Connection = headers2.Connection;
}
if (flag10) {
DateTimeOffset date;
if (DateTimeOffset.TryParse(headers2.IfModifiedSince, out date)) {
webRequest.IfModifiedSince = date.UtcDateTime;
}
}
if (flag6) {
int range;
if (int.TryParse(headers2.Range, out range)) {
webRequest.AddRange(range);
}
}
if (flag7) {
webRequest.Referer = headers2.Referer;
}
#endif
if (flag5) {
webRequest.Accept = headers2.Accept;
}
if (flag8) {
webRequest.UserAgent = headers2.UserAgent;
}
if (flag) {
webRequest.Headers[HttpRequestHeader.Host] = headers2.Host;
}
foreach (var current2 in headers2) {
var key = current2.Key;
if ((!flag || !AreEqual(HttpKnownHeaderNames.Host, key))
&& (!flag2 || !AreEqual(HttpKnownHeaderNames.Expect, key))
&& (!flag3 || !AreEqual(HttpKnownHeaderNames.TransferEncoding, key))
&& (!flag5 || !AreEqual(HttpKnownHeaderNames.Accept, key))
&& (!flag6 || !AreEqual(HttpKnownHeaderNames.Range, key))
&& (!flag7 || !AreEqual(HttpKnownHeaderNames.Referer, key))
&& (!flag8 || !AreEqual(HttpKnownHeaderNames.UserAgent, key))
&& (!flag9 || !AreEqual(HttpKnownHeaderNames.Date, key))
&& (!flag10 || !AreEqual(HttpKnownHeaderNames.IfModifiedSince, key))
&& (!flag4 || !AreEqual(HttpKnownHeaderNames.Connection, key))) {
headers[current2.Key] = current2.Value;
}
}
}
private static void SetHeaders(WebHeaderCollection headers, HttpWebRequest request)
{
foreach (string key in headers.AllKeys)
{
DateTime testDate;
switch (key.ToUpper())
{
case "AUTHORIZATION": /* Add "Bearer" to the beginning of the token (if v2). This fixes an issue where the token is not read correctly if it contains equals characters at the end. */
string value = headers[key];
if (request.Address.ToString().ToLower().Contains("/v2/"))
request.Headers.Add(key, value.Contains("Bearer") ? value : "Bearer " + value);
else
request.Headers.Add(key, value);
break;
case "CONTENT-TYPE":
request.ContentType = headers[key];
break;
case "ACCEPT":
request.Accept = headers[key];
break;
case "CONNECTION":
request.Connection = headers[key];
break;
case "CONTENT-LENGTH":
long testLong;
if (long.TryParse(headers[key], out testLong))
request.ContentLength = testLong;
break;
case "DATE":
if (DateTime.TryParse(headers[key], out testDate))
request.Date = testDate;
break;
case "EXPECT":
request.Expect = headers[key];
break;
case "HOST":
request.Host = headers[key];
break;
case "IF-MODIFIED-SINCE":
if (DateTime.TryParse(headers[key], out testDate))
request.IfModifiedSince = testDate;
break;
case "RANGE":
int testInt;
if (int.TryParse(headers[key], out testInt))
request.AddRange(testInt);
break;
case "REFERER":
request.Referer = headers[key];
break;
case "TRANSFER-ENCODING":
request.TransferEncoding = headers[key];
break;
case "USER-AGENT":
request.UserAgent = headers[key];
break;
case "PROXY-CONNECTION":
request.Proxy = new WebProxy(headers[key]);
break;
default:
request.Headers.Add(key, headers[key]);
break;
}
}
}
/// <summary>
/// Begins the download.
/// </summary>
public async Task AsyncDownload()
{
// CompareExchange is used to take control of _DownloadSyncPoint,
// and to determine whether the attempt was successful.
// CompareExchange attempts to put 1 into _DownloadSyncPoint, but
// only if the current value of _DownloadSyncPoint is zero
// (specified by the third parameter). If another thread
// has set _DownloadSyncPoint to 1, an exception is raised.
if (Interlocked.CompareExchange(ref downloadingSyncPoint, 1, 0) == 0)
{
//set DownloadStarted flag to true to indicate the download has started
DownloadStarted = true;
try
{
//this allows the Download method to wait for a previously called
//AsyncInitialize to complete
for (; ;)
{
int pt = Interlocked.CompareExchange(ref initializingSyncPoint, 1, 0);
//if original value was 0 (no initialization) or
//-1 (already initialized) break out of loop
if (pt == 0 || pt == -1)
{
break;
}
//if a CancellationToken was not provided, delay;
//otherwise, delay until the _CancellationToken is signaled or delay is elapsed
if (cancellationToken == null)
{
await Task.Delay(1);
}
else
{
await Task.Delay(1, cancellationToken);
cancellationToken.ThrowIfCancellationRequested();
}
}
//initialize download
if (!DownloadInitialized && (RequiresInitialization || AllowResuming))
{
await AsyncInitializeDownload();
//if DownloadFailed or Canceled is true, initialization failed
if (DownloadFailed || DownloadCanceled || DownloadCompleted)
{
return;
}
}
//after initialization cancel check
if (cancellationToken != null)
{
cancellationToken.ThrowIfCancellationRequested();
}
//reset DownloadAttempts to 0
DownloadAttempts = 0;
//infinite loop allows repeated download attempts
for (; ;)
{
//increment DownloadAttempts
DownloadAttempts++;
HttpWebRequest request = null;
try
{
//preemptive cancel check
if (cancellationToken != null)
{
cancellationToken.ThrowIfCancellationRequested();
}
//create a HttpWebRequest from the Uri
request = CreateRequest(Target);
//if download can be resumed
if (AllowResuming && BytesDownloaded > 0)
{
//set the requested range
request.AddRange(BytesDownloaded);
}
else
{
//no resuming, clear the buffers
ClearBuffers();
}
using (HttpWebResponse response = await request.GetResponseAsync() as HttpWebResponse)
{
//look for partial content
if (AllowResuming && BytesDownloaded > 0 &&
response.StatusCode != HttpStatusCode.PartialContent)
{
//cannot resume, no partial content
ClearBuffers();
}
if (BytesDownloaded > 0)
{
//resuming, notify we got a packet (previously)
RaiseHttpDownloadPacketReceived(BytesDownloaded);
//raises HttpDownloadProgressChanged event if percent completed changed
RaiseHttpDownloadProgressChanged();
}
//get the response stream
using (Stream downloadStream = response.GetResponseStream())
{
//defines the stream to write to
Stream str = null;
//indicates the number of bytes read in the last packet
int readCount;
try
{
//if downloading to a stream, use the target stream;
//otherwise, use the file
if (DownloadMethod == HttpDownloadMethod.ToStream)
{
//use target stream
str = targetStream;
//set the stream position to the end
str.Seek(0, SeekOrigin.End);
}
else
{
//open target file
str = File.Open(targetFile, FileMode.Append, FileAccess.Write, FileShare.None);
}
//buffer for data
byte[] buffer = new byte[0x1000];
//read from the download stream
while ((readCount = await downloadStream.ReadAsync(buffer, 0, buffer.Length, cancellationToken)) > 0)
{
//write the data to the file
await str.WriteAsync(buffer, 0, readCount, cancellationToken);
//increment the bytes count
BytesDownloaded += readCount;
//raises HttpDownloadPacketReceived event
RaiseHttpDownloadPacketReceived(readCount);
//raises HttpDownloadProgressChanged event if percent completed changed
RaiseHttpDownloadProgressChanged();
//cancel check
if (cancellationToken != null)
{
cancellationToken.ThrowIfCancellationRequested();
}
}
}
finally
{
//dispose the stream if target file
if (str != null && DownloadMethod == HttpDownloadMethod.ToFile)
{
str.Dispose();
}
}
//download completed only if no more bytes are returned
if (readCount == 0)
{
//set DownloadCompleted flag indicating successful download
DownloadCompleted = true;
}
}
}
//break the infinite loop
break;
}
catch (OperationCanceledException)
{
//catch and throw OperationCanceledException to outer try-catch
throw;
}
catch (Exception)
{
//if maximum download attempts are exceeded, throw the exception
if (DownloadAttempts >= MaxDownloadAttempts)
{
//throw exception to outer try-catch
throw;
}
}
finally
{
//finally clause aborts request
if (request != null)
{
request.Abort();
}
}
//determine if suitable delay defined
if (RepeatDelay > 0)
{
//if a CancellationToken was not provided, delay;
//otherwise, delay until _CancellationToken is signaled or RepeatDelay is elapsed
if (cancellationToken == null)
{
await Task.Delay(RepeatDelay);
}
else
{
await Task.Delay(RepeatDelay, cancellationToken);
cancellationToken.ThrowIfCancellationRequested();
}
}
}
//raise download complete event
RaiseHttpDownloadComplete();
}
catch (OperationCanceledException)
{
//set download canceled
DownloadCanceled = true;
//raise download canceled event
RaiseHttpDownloadCanceled();
}
catch (Exception ex)
{
//set download failed
DownloadFailed = true;
//raise download error event
RaiseHttpDownloadException(ex);
}
finally
{
//set download ended
DownloadStarted = false;
}
}
else
{
throw new NotSupportedException(DOWNLOAD_STARTED_EXCEPTION);
}
}
private void Download(object startpoint)
{
try
{
string filename = Convert.ToString(startpoint);
// Create a request to the file we are downloading
webRequest = (HttpWebRequest)WebRequest.Create("http://update.srb2.org/files_beta/" + downFile);
// Set the starting point of the request
webRequest.AddRange(0);
// Set default authentication for retrieving the file
webRequest.Credentials = CredentialCache.DefaultCredentials;
// Retrieve the response from the server
webResponse = (HttpWebResponse)webRequest.GetResponse();
// Ask the server for the file size and store it
Int64 fileSize = webResponse.ContentLength;
// Open the URL for download
strResponse = webResponse.GetResponseStream();
// Create a new file stream where we will be saving the data (local drive)
strLocal = new FileStream(downFile, FileMode.Create, FileAccess.Write, FileShare.None);
// It will store the current number of bytes we retrieved from the server
int bytesSize = 0;
// A buffer for storing and writing the data retrieved from the server
byte[] downBuffer = new byte[2048];
// Loop through the buffer until the buffer is empty
while ((bytesSize = strResponse.Read(downBuffer, 0, downBuffer.Length)) > 0)
{
// Write the data from the buffer to the local hard drive
strLocal.Write(downBuffer, 0, bytesSize);
// Invoke the method that updates the form's label and progress bar
this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { strLocal.Length, fileSize });
this.Invoke(new OverallProgessCallback(this.UpdateOverallProgress), new object[] { strLocal.Length });
if (goPause == true)
{
break;
}
}
}
finally
{
// When the above code has ended, close the streams
strResponse.Close();
strLocal.Close();
// And update the row!
downloadStatus = false;
if (downFile == "srb2update.update" && loadedBat != true)
{
MessageBox.Show("The updater will now restart to apply a patch.", "Self Update", MessageBoxButtons.OK);
CreateUpdaterBat();
startinfo.WindowStyle = ProcessWindowStyle.Hidden;
startinfo.FileName = "srb2update.bat";
System.Diagnostics.Process.Start(startinfo);
downloadStatus = false;
Environment.Exit(0);
} else
updateList(false);
}
}
private void Download(object startPoint)
{
try
{
// Put the object argument into an int variable
int startPointInt = Convert.ToInt32(startPoint);
// Create a request to the file we are downloading
webRequest = (HttpWebRequest) WebRequest.Create((string) txtUrl.Text);
// Set the starting point of the request
webRequest.AddRange(startPointInt);
// Set default authentication for retrieving the file
webRequest.Credentials = CredentialCache.DefaultCredentials;
// Retrieve the response from the server
webResponse = (HttpWebResponse) webRequest.GetResponse();
// Ask the server for the file size and store it
Int64 fileSize = webResponse.ContentLength;
// Open the URL for download
strResponse = webResponse.GetResponseStream();
// calculate the TargetFile
String sTargetFile = txtPath.Text;
if (Directory.Exists(txtPath.Text))
{
String sFileName = Path.GetFileName(txtUrl.Text);
sTargetFile = Path.Combine(sTargetFile, sFileName);
}
if (File.Exists(sTargetFile))
{
try
{
File.Delete(sTargetFile);
}
catch (Exception)
{
string alternativeFileName = DI.config.TempFileNameInTempDirectory + "_" +
Path.GetFileName(sTargetFile);
DI.log.info("In Donwnload could not create file :{0}, so downloding into {1} instead",
sTargetFile, alternativeFileName);
sTargetFile = alternativeFileName;
}
}
// Create a new file stream where we will be saving the data (local drive)
strLocal = startPointInt == 0
? new FileStream(sTargetFile, FileMode.Create, FileAccess.Write, FileShare.None)
: new FileStream(sTargetFile, FileMode.Append, FileAccess.Write, FileShare.None);
// It will store the current number of bytes we retrieved from the server
int bytesSize;
// A buffer for storing and writing the data retrieved from the server
var downBuffer = new byte[2048];
// Loop through the buffer until the buffer is empty
while ((bytesSize = strResponse.Read(downBuffer, 0, downBuffer.Length)) > 0)
{
// Write the data from the buffer to the local hard drive
strLocal.Write(downBuffer, 0, bytesSize);
// Invoke the method that updates the O2Form's label and progress bar
Invoke(new UpdateProgessCallback(UpdateProgress),
new object[] {strLocal.Length, fileSize + startPointInt});
if (goPause)
{
break;
}
}
// invoke completed callback
if (dCallbackWhenCompleted != null)
{
dCallbackWhenCompleted.Invoke(sTargetFile);
}
}
catch (Exception ex)
{
string message = string.Format("in Download: {0} (for request:{1})", ex.Message, txtUrl.Text);
lblProgress.invokeOnThread(() =>
{
lblProgress.Text = message;
lblProgress.ForeColor = Color.Red;
});
DI.log.error(message);
}
finally
{
// When the above code has ended, close the streams
if (strResponse != null)
strResponse.Close();
if (strLocal != null)
strLocal.Close();
}
// close O2Form if required
if (cbCloseWindowWhenDownloadComplete.Checked)
{
if (Parent != null && (Parent.GetType().Name == "Form" || Parent.GetType().Name == "GenericDockContent"))
{
O2Forms.executeMethodThreadSafe(Parent, "Close");
}
//().Close();
//this.Parent
}
}
public void Start(string filename)
{
try
{
_state = new DownloadState();
_state.Filestream = new FileStream(filename, FileMode.Append, FileAccess.Write, FileShare.Write);
_received = _state.Filestream.Length;
_request = WebRequest.Create(this.Url) as HttpWebRequest;
_request.AddRange((int)_state.Filestream.Length);
_timeout = new System.Threading.Timer(new TimerCallback(this.OnTimeout), _state,
ResponseTimeout, System.Threading.Timeout.Infinite);
_request.BeginGetResponse(new AsyncCallback(this.HttpResponseReceived), _state);
}
catch (Exception ex)
{
this.NotifyParentOfCompletion(false, ex);
}
}
private static void AddRange(HttpWebRequest r, string range)
{
Match m = Regex.Match(range, "(\\w+)=(\\d+)-(\\d+)$");
if (!m.Success)
{
return;
}
string rangeSpecifier = m.Groups[1].Value;
int from = Convert.ToInt32(m.Groups[2].Value);
int to = Convert.ToInt32(m.Groups[3].Value);
r.AddRange(rangeSpecifier, from, to);
}
/// <summary>
/// 断点下载,只有PC上能用，放android上抛出NotSupportException....
/// </summary>
/// <param name="url"></param>
/// <param name="saveFile"></param>
/// <returns></returns>
IEnumerator FPointDown(string url, string saveFile)
{
MyDebug.Log("-1");
System.Net.HttpWebRequest request = null;
System.IO.FileStream fs = null;
long contentLength = 0;
//打开网络连接
try
{
MyDebug.Log("0");
request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
MyDebug.Log("1");
System.Net.HttpWebRequest requestGetCount = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
MyDebug.Log("2");
contentLength = requestGetCount.GetResponse().ContentLength;
MyDebug.Log("3,len=" + contentLength);
//打开上次下载的文件或新建文件
long lStartPos = 0;
if (System.IO.File.Exists(saveFile))
{
MyDebug.Log("4");
fs = System.IO.File.OpenWrite(saveFile);
lStartPos = fs.Length;
MyDebug.Log("5,lStartPos=" + lStartPos);
if (contentLength - lStartPos <= 0)
{
fs.Close();
if (callBack != null)
{
callBack(saveFile, CALLBACK_TYPE.SUCCESS, contentLength, contentLength, 1); //下载完成
}
yield break;
}
fs.Seek(lStartPos, System.IO.SeekOrigin.Current); //移动文件流中的当前指针
}
else
{
MyDebug.Log("6");
fs = new System.IO.FileStream(saveFile, System.IO.FileMode.Create);
}
if (lStartPos > 0)
{
MyDebug.Log("7");
request.AddRange((int)lStartPos); //设置Range值
MyDebug.Log("上次已经下载：" + lStartPos);
//print(lStartPos);
}
}
catch (Exception e)
{
MyDebug.LogError("8," + e.ToString());
yield break;
}
//向服务器请求，获得服务器回应数据流
System.IO.Stream ns = request.GetResponse().GetResponseStream();
int len = 1024 * 128;
byte[] nbytes = new byte[len];
int nReadSize = 0;
nReadSize = ns.Read(nbytes, 0, len);
Debug.LogError("9,nReadSize=" + nReadSize);
while (nReadSize > 0)
{
fs.Write(nbytes, 0, nReadSize);
nReadSize = ns.Read(nbytes, 0, len);
if (callBack != null)
{
callBack(url, CALLBACK_TYPE.PROGRESS, fs.Length, contentLength, (fs.Length * 0.001f) / (contentLength * 0.001f)); //正在下载
}
//strInfo = "已下载" + fs.Length / 1024 + "kb /" + countLength / 1024 + "kb";
yield return(false);
}
ns.Close();
fs.Close();
Debug.LogError("10");
if (callBack != null)
{
callBack(saveFile, CALLBACK_TYPE.SUCCESS, contentLength, contentLength, 1); //下载完成
}
}
private void DownloadBlockFileCore(System.Uri address, string fileName, object userToken, int from, int to)
{
HttpWebRequest webRequest = null;
string tmp = GetTmpFileName(fileName); // + ".tmp";
using (FileStream fileStream = new FileStream(tmp, FileMode.OpenOrCreate)) {
try {
long startPos = fileStream.Length;
int fileLen = to - from + 1;
if (fileLen == startPos)
{
if (this.async)
{
this.OnBlockDownloadingProgressChanged(new DownloadingProgressChangedEventArgs(startPos, (int)startPos, fileLen, userToken));
}
return;
}
else if (fileLen < startPos)
{
throw new CacheFileException(tmp, "cache file is error!:" + fileName);
}
else if (startPos + from >= to)
{
throw new CacheFileException(tmp, "file block is error!:" + fileName);
}
webRequest = (HttpWebRequest)this.SetupRequest(address);
webRequest.AddRange((int)startPos + from, to);
fileStream.Seek(startPos, SeekOrigin.Current);
WebResponse webResponse = this.GetWebResponse(webRequest);
Stream responseStream = webResponse.GetResponseStream();
int num = (int)webResponse.ContentLength;
int num2 = (num > -1 && num <= 16384) ? num : 16384; //16KB
byte[] array = new byte[num2];
long num3 = 0L;
int num4;
int num1 = num + (int)startPos;
if (startPos > 0 && async)
{
this.OnBlockDownloadingProgressChanged(new DownloadingProgressChangedEventArgs(startPos, (int)startPos, num1, userToken));
}
while ((num4 = responseStream.Read(array, 0, num2)) != 0)
{
num3 += (long)num4;
fileStream.Write(array, 0, num4);
if (this.async)
{
this.OnBlockDownloadingProgressChanged(new DownloadingProgressChangedEventArgs(num4, num4, num1, userToken));
}
}
webRequest.Abort();
if (num3 + startPos < num1)
{
throw new Exception(string.Format("download fail uri:{0} ", address));
}
else if (num3 + startPos > num1)
{
throw new CacheFileException(tmp, string.Format("file is wrong!uri:{0} ", address));
}
} catch (ThreadInterruptedException) {
if (webRequest != null)
{
webRequest.Abort();
}
throw;
}
}
}
public LocalRelay(HttpListenerContext context)
{
this.originalContext = context;
relayRequest = WebRequest.CreateHttp (context.Request.RawUrl);
foreach (var key in context.Request.Headers.AllKeys) {
if (HeaderUtil.validRelayHeader (key)) {
//headers.Set (key, context.Request.Headers[key]);
relayRequest.Headers.Set (key, context.Request.Headers.Get (key));
}
}
var originalRequest = context.Request;
relayRequest.UserAgent = originalRequest.UserAgent;
if (originalRequest.Headers.AllKeys.Any (h => h.ToLower () == "range")) {
relayRequest.AddRange (Int32.Parse (originalRequest.Headers [originalRequest.Headers.AllKeys.First (k => k.ToLower () == "range")]));
}
if (originalRequest.Headers.AllKeys.Any (h => h.ToLower () == "referer")) {
// relayRequest.AddRange (Int32.Parse (originalRequest.Headers [originalRequest.Headers.AllKeys.Where (k => k.ToLower () == "range").ToList ().First ()]));
relayRequest.Referer = originalRequest.Headers [originalRequest.Headers.AllKeys.First (k => k.ToLower () == "referer")];
}
//relayRequest.Accept = originalRequest.AcceptTypes;
relayRequest.ContentLength = originalRequest.ContentLength64;
//relayRequest.Headers.Add (headers);
//relayRequest.KeepAlive = false;
relayRequest.Method = context.Request.HttpMethod;
if (context.Request.HasEntityBody) {
var requestStream = relayRequest.GetRequestStream ();
context.Request.InputStream.CopyTo (requestStream);
requestStream.Flush ();
}
//微软你炸
WebResponse relayResponse;
try {
relayResponse = relayRequest.GetResponse ();
originalContext.Response.StatusCode = (int)((HttpWebResponse)relayResponse).StatusCode;
} catch (WebException e) {
//originalContext.Response.StatusCode = (int)((HttpWebResponse)e.Response).StatusCode;
if (e.Response != null) {
relayResponse = e.Response;
originalContext.Response.StatusCode = (int)((HttpWebResponse)e.Response).StatusCode;
} else {
context.Response.Abort ();
return;
}
}
foreach (var h in relayResponse.Headers.AllKeys) {
if (HeaderUtil.isEndToEndHeader (h))
context.Response.AddHeader (h, relayResponse.Headers.Get (h));
}
//context.Response.ContentType = relayResponse.ContentType;
//context.Response.ContentLength64 = relayResponse.ContentLength;
try {
relayResponse.GetResponseStream ().CopyTo (context.Response.OutputStream);
context.Response.OutputStream.Flush ();
context.Response.OutputStream.Close ();
context.Response.Close ();
} catch (Exception e) {
Console.WriteLine (e.ToString ());
}
//relayRequest.
}
protected void OpenAt(long offset, HttpMethod method)
{
if (offset < 0) {
throw new IOException("Position cannot be negative");
}
if (offset > 0 && method == HttpMethod.HEAD) {
throw new ArgumentException(
"Cannot use a position (seek) with HEAD request");
}
Close();
Dispose();
request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = method.ToString();
if (referrer != null) {
request.Referer = referrer.ToString();
}
request.AllowAutoRedirect = true;
request.Timeout = TIMEOUT * 1000;
request.UserAgent = UserAgent;
if (offset > 0) {
request.AddRange(offset);
}
response = (HttpWebResponse)request.GetResponse();
if (method != HttpMethod.HEAD) {
responseStream = response.GetResponseStream();
if (responseStream == null) {
throw new IOException("Didn't get a response stream");
}
bufferedStream = new BufferedStream(responseStream, BUFFER_SIZE);
}
if (offset > 0 && response.StatusCode != HttpStatusCode.PartialContent) {
throw new IOException(
"Failed to open the http stream at a specific position");
}
if (offset == 0 && response.StatusCode != HttpStatusCode.OK) {
throw new IOException("Failed to open the http stream");
}
logger.InfoFormat("Opened {0} {1} at {2}", method, uri, offset);
}
private static int ReadRequestHeaders(StreamReader sr, HttpWebRequest webReq)
{
String httpCmd;
int contentLen = 0;
do
{
httpCmd = sr.ReadLine();
if (String.IsNullOrEmpty(httpCmd))
return contentLen;
String[] header = httpCmd.Split(colonSpaceSplit, 2, StringSplitOptions.None);
switch (header[0].ToLower())
{
case "host":
webReq.Host = header[1];
break;
case "user-agent":
webReq.UserAgent = header[1];
break;
case "accept":
webReq.Accept = header[1];
break;
case "referer":
webReq.Referer = header[1];
break;
case "cookie":
webReq.Headers["Cookie"] = header[1];
break;
case "proxy-connection":
case "connection":
case "keep-alive":
//ignore these
break;
case "content-length":
int.TryParse(header[1], out contentLen);
break;
case "content-type":
webReq.ContentType = header[1];
break;
case "range": //bytes=100-200
var split1 = header[1].Split(equalSplit);
var split2 = split1[1].Split(new char[] { '-' });
webReq.AddRange(int.Parse(split2[0]), int.Parse(split2[1]));
break;
case "if-modified-since":
String[] sb = header[1].Trim().Split(semiSplit);
DateTime d;
if (DateTime.TryParse(sb[0], out d))
webReq.IfModifiedSince = d;
break;
default:
try
{
webReq.Headers.Add(header[0], header[1]);
}
catch (Exception ex)
{
Console.WriteLine(String.Format("Could not add header {0}. Exception message:{1}", header[0], ex.Message));
}
break;
}
} while (!String.IsNullOrWhiteSpace(httpCmd));
return contentLen;
}
private static void ReadRequestHeaders(ref List<string> RequestLines, HttpWebRequest WebRequest)
{
for (int i = 1; i < RequestLines.Count; i++)
{
String httpCmd = RequestLines[i];
String[] header = httpCmd.Split(colonSpaceSplit, 2, StringSplitOptions.None);
if (!String.IsNullOrEmpty(header[0].Trim()))
switch (header[0].ToLower())
{
case "accept":
WebRequest.Accept = header[1];
break;
case "accept-encoding":
WebRequest.Headers.Add(header[0], "gzip,deflate,zlib");
break;
case "cookie":
WebRequest.Headers["Cookie"] = header[1];
break;
case "connection":
if (header[1].ToLower() == "keep-alive")
WebRequest.KeepAlive = true;
break;
case "content-length":
int contentLen;
int.TryParse(header[1], out contentLen);
if (contentLen != 0)
WebRequest.ContentLength = contentLen;
break;
case "content-type":
WebRequest.ContentType = header[1];
break;
case "expect":
if (header[1].ToLower() == "100-continue")
WebRequest.ServicePoint.Expect100Continue = true;
else
WebRequest.Expect = header[1];
break;
case "host":
WebRequest.Host = header[1];
break;
case "if-modified-since":
String[] sb = header[1].Trim().Split(semiSplit);
DateTime d;
if (DateTime.TryParse(sb[0], out d))
WebRequest.IfModifiedSince = d;
break;
case "proxy-connection":
break;
case "range":
var startEnd = header[1].Replace(Environment.NewLine, "").Remove(0, 6).Split('-');
if (startEnd.Length > 1) { if (!String.IsNullOrEmpty(startEnd[1])) WebRequest.AddRange(int.Parse(startEnd[0]), int.Parse(startEnd[1])); else WebRequest.AddRange(int.Parse(startEnd[0])); }
else
WebRequest.AddRange(int.Parse(startEnd[0]));
break;
case "referer":
WebRequest.Referer = header[1];
break;
case "user-agent":
WebRequest.UserAgent = header[1];
break;
case "transfer-encoding":
if (header[1].ToLower() == "chunked")
WebRequest.SendChunked = true;
else
WebRequest.SendChunked = false;
break;
case "upgrade":
if (header[1].ToLower() == "http/1.1")
WebRequest.Headers.Add(header[0], header[1]);
break;
default:
if (header.Length > 0)
WebRequest.Headers.Add(header[0], header[1]);
else
WebRequest.Headers.Add(header[0], "");
break;
}
}
}
private void HandleRangeHeader(HttpWebRequest webrequest)
{
if (!(request is IRangedRequest)) return;
var rangedRequest = (IRangedRequest) request;
if (rangedRequest.RangeFrom != 0 && rangedRequest.RangeTo == 0)
webrequest.AddRange("bytes", rangedRequest.RangeFrom);
else if (rangedRequest.RangeFrom == 0 && rangedRequest.RangeTo != 0)
webrequest.AddRange("bytes", rangedRequest.RangeTo);
else if (rangedRequest.RangeFrom != 0 && rangedRequest.RangeTo != 0)
webrequest.AddRange("bytes", rangedRequest.RangeFrom, rangedRequest.RangeTo);
}
public static void AddRangeBasedOffsetLength(this HttpWebRequest @this, long offset, long length)
{
@this.AddRange(offset, offset + length - 1);
}
void ThreadableResumeDownload(string url, Action <int, int> stepCallback, Action errorCallback, Action successCallback)
{
//string tmpFullPath = TmpDownloadPath; //根据实际情况设置
System.IO.FileStream downloadFileStream;
//打开上次下载的文件或新建文件
long lStartPos = 0;
if (System.IO.File.Exists(TmpDownloadPath))
{
downloadFileStream = System.IO.File.OpenWrite(TmpDownloadPath);
lStartPos = downloadFileStream.Length;
downloadFileStream.Seek(lStartPos, System.IO.SeekOrigin.Current); //移动文件流中的当前指针
CDebug.LogConsole_MultiThread("Resume.... from {0}", lStartPos);
}
else
{
downloadFileStream = new System.IO.FileStream(TmpDownloadPath, System.IO.FileMode.Create);
lStartPos = 0;
}
System.Net.HttpWebRequest request = null;
//打开网络连接
try
{
request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
if (lStartPos > 0)
{
request.AddRange((int)lStartPos); //设置Range值
}
CDebug.LogConsole_MultiThread("Getting Response : {0}", url);
//向服务器请求，获得服务器回应数据流
using (var response = request.GetResponse()) // TODO: Async Timeout
{
CDebug.LogConsole_MultiThread("Getted Response : {0}", url);
if (IsFinished)
{
throw new Exception(string.Format("Get Response ok, but is finished , maybe timeout! : {0}", url));
}
else
{
var totalSize = (int)response.ContentLength;
if (totalSize <= 0)
{
totalSize = int.MaxValue;
}
using (var ns = response.GetResponseStream())
{
CDebug.LogConsole_MultiThread("Start Stream: {0}", url);
int downSize = (int)lStartPos;
int chunkSize = 10240;
byte[] nbytes = new byte[chunkSize];
int nReadSize = (int)lStartPos;
while ((nReadSize = ns.Read(nbytes, 0, chunkSize)) > 0)
{
if (IsFinished)
{
throw new Exception("When Reading Web stream but Downloder Finished!");
}
downloadFileStream.Write(nbytes, 0, nReadSize);
downSize += nReadSize;
stepCallback(totalSize, downSize);
}
stepCallback(totalSize, totalSize);
request.Abort();
downloadFileStream.Close();
}
}
}
CDebug.LogConsole_MultiThread("下载完成: {0}", url);
if (File.Exists(_SavePath))
{
File.Delete(_SavePath);
}
File.Move(TmpDownloadPath, _SavePath);
}
catch (Exception ex)
{
CDebug.LogConsole_MultiThread("下载过程中出现错误:" + ex.ToString());
downloadFileStream.Close();
if (request != null)
{
request.Abort();
}
try
{
if (File.Exists(TmpDownloadPath))
{
File.Delete(TmpDownloadPath); // delete temporary file
}
}
catch (Exception e)
{
CDebug.LogConsole_MultiThread(e.Message);
}
errorCallback();
}
successCallback();
}