// Worker thread
private void WorkerThread()
{
// buffer to read stream
var buffer = new byte[BufSize];
// JPEG magic number
var jpegMagic = new byte[] { 0xFF, 0xD8, 0xFF };
var encoding = new ASCIIEncoding();
var res = ReasonToFinishPlaying.StoppedByUser;
while (!_stopEvent.WaitOne(0, false))
{
// reset reload event
_reloadEvent.Reset();
// HTTP web request
HttpWebRequest request = null;
// web response
WebResponse response = null;
// stream for MJPEG downloading
Stream stream = null;
// boundary between images (string and binary versions)
byte[] boundary;
string boudaryStr = null;
// length of boundary
// flag signaling if boundary was checked or not
bool boundaryIsChecked = false;
// read amounts and positions
int todo = 0, total = 0, pos = 0, align = 1;
int start = 0;
// align
// 1 = searching for image start
// 2 = searching for image end
try
{
// create request
request = GenerateRequest(_source);
// get response
response = request.GetResponse();
// check content type
string contentType = response.ContentType;
string[] contentTypeArray = contentType.Split('/');
// "application/octet-stream"
int boundaryLen;
if ((contentTypeArray[0] == "application") && (contentTypeArray[1] == "octet-stream"))
{
boundaryLen = 0;
boundary = new byte[0];
}
else if ((contentTypeArray[0] == "multipart") && (contentType.Contains("mixed")))
{
// get boundary
int boundaryIndex = contentType.IndexOf("boundary", 0, StringComparison.Ordinal);
if (boundaryIndex != -1)
{
boundaryIndex = contentType.IndexOf("=", boundaryIndex + 8, StringComparison.Ordinal);
}
if (boundaryIndex == -1)
{
// try same scenario as with octet-stream, i.e. without boundaries
boundaryLen = 0;
boundary = new byte[0];
}
else
{
boudaryStr = contentType.Substring(boundaryIndex + 1);
// remove spaces and double quotes, which may be added by some IP cameras
boudaryStr = boudaryStr.Trim(' ', '"');
boundary = encoding.GetBytes(boudaryStr);
boundaryLen = boundary.Length;
boundaryIsChecked = false;
}
}
else
{
if (contentType == "text/html")
{
try
{
//read body
var sr = new StreamReader(response.GetResponseStream());
var html = sr.ReadToEnd();
if (html.IndexOf("setup_kakulens.html", StringComparison.Ordinal) != -1)
{
//hack for panasonic cameras that redirect on reboot in privacy mode - POST a command to disable privacy
if (DisablePrivacy(request))
{
_needsPrivacyEnabledTarget = Helper.Now.AddSeconds(4);
_needsPrivacyEnabled = true;
}
}
}
catch (Exception ex)
{
MainForm.LogExceptionToFile(ex);
}
//continue to throw the invalid content type error as the next retry should connect
}
throw new Exception("Invalid content type.");
}
// get response stream
stream = response.GetResponseStream();
stream.ReadTimeout = _requestTimeout;
// loop
while ((!_stopEvent.WaitOne(0, false)) && (!_reloadEvent.WaitOne(0, false)))
{
// check total read
if (total > BufSize - ReadSize)
{
total = pos = todo = 0;
}
// read next portion from stream
int read;
if ((read = stream.Read(buffer, total, ReadSize)) == 0)
{
throw new ApplicationException();
}
total += read;
todo += read;
// increment received bytes counter
_bytesReceived += read;
// do we need to check boundary ?
if ((boundaryLen != 0) && (!boundaryIsChecked))
{
// some IP cameras, like AirLink, claim that boundary is "myboundary",
// when it is really "--myboundary". this needs to be corrected.
pos = ByteArrayUtils.Find(buffer, boundary, 0, todo);
// continue reading if boudary was not found
if (pos == -1)
{
continue;
}
for (int i = pos - 1; i >= 0; i--)
{
byte ch = buffer[i];
if ((ch == (byte)'\n') || (ch == (byte)'\r'))
{
break;
}
boudaryStr = (char)ch + boudaryStr;
}
boundary = encoding.GetBytes(boudaryStr);
boundaryLen = boundary.Length;
boundaryIsChecked = true;
}
// search for image start
if ((align == 1) && (todo >= jpegMagic.Length))
{
start = ByteArrayUtils.Find(buffer, jpegMagic, pos, todo);
if (start != -1)
{
// found JPEG start
pos = start + jpegMagic.Length;
todo = total - pos;
align = 2;
}
else
{
// delimiter not found
todo = jpegMagic.Length - 1;
pos = total - todo;
}
}
// search for image end ( boundaryLen can be 0, so need extra check )
while ((align == 2) && (todo != 0) && (todo >= boundaryLen))
{
int stop = ByteArrayUtils.Find(buffer,
(boundaryLen != 0) ? boundary : jpegMagic,
pos, todo);
if (stop != -1)
{
// increment frames counter
_framesReceived++;
// image at stop
if ((NewFrame != null) && (!_stopEvent.WaitOne(0, false)))
{
if (!String.IsNullOrEmpty(DecodeKey))
{
byte[] marker = Encoding.ASCII.GetBytes(DecodeKey);
using (var ms = new MemoryStream(buffer, start + jpegMagic.Length, jpegMagic.Length + marker.Length))
{
var key = new byte[marker.Length];
ms.Read(key, 0, marker.Length);
if (!ByteArrayUtils.UnsafeCompare(marker, key))
{
throw (new Exception("Image Decode Failed - Check the decode key matches the encode key on ispy server"));
}
}
using (var ms = new MemoryStream(buffer, start + marker.Length, stop - start - marker.Length))
{
ms.Seek(0, SeekOrigin.Begin);
ms.WriteByte(jpegMagic[0]);
ms.WriteByte(jpegMagic[1]);
ms.WriteByte(jpegMagic[2]);
ms.Seek(0, SeekOrigin.Begin);
using (var bitmap = (Bitmap)Image.FromStream(ms)) {
NewFrame(this, new NewFrameEventArgs(bitmap));
}
}
}
else
{
using (var ms = new MemoryStream(buffer, start, stop - start))
{
using (var bitmap = (Bitmap)Image.FromStream(ms))
{
NewFrame(this, new NewFrameEventArgs(bitmap));
}
}
}
if (_needsPrivacyEnabled && _needsPrivacyEnabledTarget < Helper.Now)
{
if (EnablePrivacy(request))
{
_needsPrivacyEnabled = false;
}
}
}
// shift array
pos = stop + boundaryLen;
todo = total - pos;
System.Array.Copy(buffer, pos, buffer, 0, todo);
total = todo;
pos = 0;
align = 1;
}
else
{
// boundary not found
if (boundaryLen != 0)
{
todo = boundaryLen - 1;
pos = total - todo;
}
else
{
todo = 0;
pos = total;
}
}
}
}
}
catch (ApplicationException)
{
// do nothing for Application Exception, which we raised on our own
// wait for a while before the next try
Thread.Sleep(250);
}
catch (ThreadAbortException)
{
break;
}
catch (Exception ex)
{
// provide information to clients
MainForm.LogExceptionToFile(ex);
res = ReasonToFinishPlaying.DeviceLost;
break;
// wait for a while before the next try
//Thread.Sleep(250);
}
finally
{
// abort request
if (request != null)
{
try
{
request.Abort();
}
catch {}
request = null;
}
// close response stream
if (stream != null)
{
try
{
stream.Flush();
}
catch
{
}
try
{
stream.Close();
}
catch
{
}
try
{
stream.Dispose();
}
catch {}
stream = null;
}
// close response
if (response != null)
{
try
{
response.Close();
}
catch
{
}
response = null;
}
}
// need to stop ?
if (_stopEvent.WaitOne(0, false))
{
break;
}
}
if (PlayingFinished != null)
{
PlayingFinished(this, res);
}
}
// Worker thread
private void WorkerThread()
{
// buffer to read stream
var buffer = new byte[BufSize];
// JPEG magic number
var jpegMagic = new byte[] { 0xFF, 0xD8, 0xFF };
var encoding = new ASCIIEncoding();
while (!_stopEvent.WaitOne(0, false))
{
// reset reload event
_reloadEvent.Reset();
// HTTP web request
HttpWebRequest request = null;
// web responce
WebResponse response = null;
// stream for MJPEG downloading
Stream stream = null;
// boundary betweeen images (string and binary versions)
byte[] boundary;
string boudaryStr = null;
// length of boundary
// flag signaling if boundary was checked or not
bool boundaryIsChecked = false;
// read amounts and positions
int todo = 0, total = 0, pos = 0, align = 1;
int start = 0;
// align
// 1 = searching for image start
// 2 = searching for image end
try
{
// create request
request = (HttpWebRequest)WebRequest.Create(_source);
// set user agent
if (_userAgent != null)
{
request.UserAgent = _userAgent;
}
// set proxy
if (_proxy != null)
{
request.Proxy = _proxy;
}
if (_usehttp10)
{
request.ProtocolVersion = HttpVersion.Version10;
}
// set timeout value for the request
request.Timeout = _requestTimeout;
request.AllowAutoRedirect = true;
ServicePointManager.ServerCertificateValidationCallback += Certificates.ValidateRemoteCertificate;
// set login and password
if ((_login != null) && (_password != null) && (_login != string.Empty))
{
request.Credentials = new NetworkCredential(_login, _password);
}
// set connection group name
if (_useSeparateConnectionGroup)
{
request.ConnectionGroupName = GetHashCode().ToString();
}
// force basic authentication through extra headers if required
var authInfo = "";
if (!String.IsNullOrEmpty(_login))
{
authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(_login + ":" + _password));
request.Headers["Authorization"] = "Basic " + authInfo;
}
if (!String.IsNullOrEmpty(_cookies))
{
_cookies = _cookies.Replace("[AUTH]", authInfo);
var myContainer = new CookieContainer();
string[] coll = _cookies.Split(';');
foreach (var ckie in coll)
{
if (!String.IsNullOrEmpty(ckie))
{
string[] nv = ckie.Split('=');
if (nv.Length == 2)
{
var cookie = new Cookie(nv[0].Trim(), nv[1].Trim());
myContainer.Add(new Uri(request.RequestUri.ToString()), cookie);
}
}
}
request.CookieContainer = myContainer;
}
// get response
response = request.GetResponse();
// check content type
string contentType = response.ContentType;
string[] contentTypeArray = contentType.Split('/');
// "application/octet-stream"
int boundaryLen;
if ((contentTypeArray[0] == "application") && (contentTypeArray[1] == "octet-stream"))
{
boundaryLen = 0;
boundary = new byte[0];
}
else if ((contentTypeArray[0] == "multipart") && (contentType.Contains("mixed")))
{
// get boundary
int boundaryIndex = contentType.IndexOf("boundary", 0);
if (boundaryIndex != -1)
{
boundaryIndex = contentType.IndexOf("=", boundaryIndex + 8);
}
if (boundaryIndex == -1)
{
// try same scenario as with octet-stream, i.e. without boundaries
boundaryLen = 0;
boundary = new byte[0];
}
else
{
boudaryStr = contentType.Substring(boundaryIndex + 1);
// remove spaces and double quotes, which may be added by some IP cameras
boudaryStr = boudaryStr.Trim(' ', '"');
boundary = encoding.GetBytes(boudaryStr);
boundaryLen = boundary.Length;
boundaryIsChecked = false;
}
}
else
{
throw new Exception("Invalid content type.");
}
// get response stream
stream = response.GetResponseStream();
stream.ReadTimeout = _requestTimeout;
// loop
while ((!_stopEvent.WaitOne(0, false)) && (!_reloadEvent.WaitOne(0, false)))
{
// check total read
if (total > BufSize - ReadSize)
{
total = pos = todo = 0;
}
// read next portion from stream
int read;
if ((read = stream.Read(buffer, total, ReadSize)) == 0)
{
throw new ApplicationException();
}
total += read;
todo += read;
// increment received bytes counter
_bytesReceived += read;
// do we need to check boundary ?
if ((boundaryLen != 0) && (!boundaryIsChecked))
{
// some IP cameras, like AirLink, claim that boundary is "myboundary",
// when it is really "--myboundary". this needs to be corrected.
pos = ByteArrayUtils.Find(buffer, boundary, 0, todo);
// continue reading if boudary was not found
if (pos == -1)
{
continue;
}
for (int i = pos - 1; i >= 0; i--)
{
byte ch = buffer[i];
if ((ch == (byte)'\n') || (ch == (byte)'\r'))
{
break;
}
boudaryStr = (char)ch + boudaryStr;
}
boundary = encoding.GetBytes(boudaryStr);
boundaryLen = boundary.Length;
boundaryIsChecked = true;
}
// search for image start
if ((align == 1) && (todo >= jpegMagic.Length))
{
start = ByteArrayUtils.Find(buffer, jpegMagic, pos, todo);
if (start != -1)
{
// found JPEG start
pos = start + jpegMagic.Length;
todo = total - pos;
align = 2;
}
else
{
// delimiter not found
todo = jpegMagic.Length - 1;
pos = total - todo;
}
}
// search for image end ( boundaryLen can be 0, so need extra check )
while ((align == 2) && (todo != 0) && (todo >= boundaryLen))
{
int stop = ByteArrayUtils.Find(buffer,
(boundaryLen != 0) ? boundary : jpegMagic,
pos, todo);
if (stop != -1)
{
// increment frames counter
_framesReceived++;
// image at stop
if ((NewFrame != null) && (!_stopEvent.WaitOne(0, false)))
{
Bitmap bitmap;
if (!String.IsNullOrEmpty(DecodeKey))
{
byte[] marker = Encoding.ASCII.GetBytes(DecodeKey);
using (var ms = new MemoryStream(buffer, start + jpegMagic.Length, jpegMagic.Length + marker.Length))
{
var key = new byte[marker.Length];
ms.Read(key, 0, marker.Length);
if (!ByteArrayUtils.UnsafeCompare(marker, key))
{
throw (new Exception("Image Decode Failed - Check the decode key matches the encode key on ispy server"));
}
}
using (var ms = new MemoryStream(buffer, start + marker.Length, stop - start - marker.Length))
{
ms.Seek(0, SeekOrigin.Begin);
ms.WriteByte(jpegMagic[0]);
ms.WriteByte(jpegMagic[1]);
ms.WriteByte(jpegMagic[2]);
ms.Seek(0, SeekOrigin.Begin);
bitmap = (Bitmap)Image.FromStream(ms);
}
}
else
{
using (var ms = new MemoryStream(buffer, start, stop - start))
{
bitmap = (Bitmap)Image.FromStream(ms);
}
}
// notify client
NewFrame(this, new NewFrameEventArgs(bitmap));
// release the image
bitmap.Dispose();
bitmap = null;
}
// shift array
pos = stop + boundaryLen;
todo = total - pos;
Array.Copy(buffer, pos, buffer, 0, todo);
total = todo;
pos = 0;
align = 1;
}
else
{
// boundary not found
if (boundaryLen != 0)
{
todo = boundaryLen - 1;
pos = total - todo;
}
else
{
todo = 0;
pos = total;
}
}
}
}
}
catch (ApplicationException)
{
// do nothing for Application Exception, which we raised on our own
// wait for a while before the next try
Thread.Sleep(250);
}
catch (ThreadAbortException)
{
break;
}
catch (Exception exception)
{
// provide information to clients
if (VideoSourceError != null)
{
VideoSourceError(this, new VideoSourceErrorEventArgs(exception.Message));
}
// wait for a while before the next try
Thread.Sleep(250);
}
finally
{
// abort request
if (request != null)
{
try
{
request.Abort();
}
catch {}
request = null;
}
// close response stream
if (stream != null)
{
stream.Close();
stream = null;
}
// close response
if (response != null)
{
response.Close();
response = null;
}
}
// need to stop ?
if (_stopEvent.WaitOne(0, false))
{
break;
}
}
if (PlayingFinished != null)
{
PlayingFinished(this, ReasonToFinishPlaying.StoppedByUser);
}
}