//
// called by HttpWebRequest if AllowWriteStreamBuffering is true on that instance
//
internal void EnableWriteBuffering() {
GlobalLog.Assert(WriteStream, "ConnectStream#{0}::EnableWriteBuffering()|!WriteStream", ValidationHelper.HashString(this));
if (BufferedData==null) {
// create stream on demand, only if needed
GlobalLog.Print("ConnectStream#" + ValidationHelper.HashString(this) + "::EnableWriteBuffering() Write() creating ScatterGatherBuffers WriteChunked:" + WriteChunked.ToString() + " BytesLeftToWrite:" + BytesLeftToWrite.ToString());
if (WriteChunked)
{
BufferedData = new ScatterGatherBuffers();
}
else
{
BufferedData = new ScatterGatherBuffers(BytesLeftToWrite);
}
}
}
internal void Write(ScatterGatherBuffers writeBuffer)
{
BufferOffsetSize[] buffers = writeBuffer.GetBuffers();
if (buffers != null)
{
base.MultipleWrite(buffers);
}
}
// This method is called by ConnectStream, only when resubmitting
// We have sent the headers already in HttpWebRequest.EndSubmitRequest()
// which calls ConnectStream.WriteHeaders() which calls to HttpWebRequest.EndWriteHeaders()
// which calls ConnectStream.ResubmitWrite() which calls in here
internal void Write(ScatterGatherBuffers writeBuffer) {
GlobalLog.Enter("Connection#" + ValidationHelper.HashString(this) + "::Write(ScatterGatherBuffers) networkstream#" + ValidationHelper.HashString(NetworkStream));
//
// parameter validation
//
GlobalLog.Assert(writeBuffer != null, "Connection#{0}::Write(ScatterGatherBuffers)|writeBuffer == null", ValidationHelper.HashString(this));
//
// set up array for MultipleWrite call
// note that GetBuffers returns null if we never wrote to it.
//
BufferOffsetSize[] buffers = writeBuffer.GetBuffers();
if (buffers!=null) {
//
// This will block writing the buffers out.
//
MultipleWrite(buffers);
}
GlobalLog.Leave("Connection#" + ValidationHelper.HashString(this) + "::Write(ScatterGatherBuffers) this:" + ValidationHelper.HashString(this) + " writeBuffer.Size:" + writeBuffer.Length.ToString());
}
internal void WriteStartNextRequest(ScatterGatherBuffers writeBuffer, ref ConnectionReturnResult returnResult) {
GlobalLog.Enter("Connection#" + ValidationHelper.HashString(this) + "::WriteStartNextRequest");
//
// If we've been buffering, data in order to determina
// data size length for eing/Put, then now at this
// point do the actual upload
//
if (writeBuffer!=null) {
try {
//
// Upload entity body data that has been buffered now
//
Write(writeBuffer);
}
catch (Exception exception) {
GlobalLog.Print("Connection#" + ValidationHelper.HashString(this) + "::WriteStartNextRequest(ScatterGatherBuffers) caught Exception:" + exception.Message);
m_Error = WebExceptionStatus.SendFailure;
}
}
Monitor.Enter(this);
GlobalLog.Print("Connection#" + ValidationHelper.HashString(this) + "::WriteStartNextRequest() setting m_WriteDone:" + m_WriteDone.ToString() + " to true");
m_WriteDone = true;
HttpWebRequest NextRequest = null;
//
// If we're not doing keep alive, and the read on this connection
// has already completed, now is the time to close the
// connection.
//
if (!m_KeepAlive || m_Error != WebExceptionStatus.Success) {
GlobalLog.Print("Connection#" + ValidationHelper.HashString(this) + "::WriteStartNextRequest() _WriteList (size) " + m_WriteList.Count.ToString() + " - cnt#" + ValidationHelper.HashString(this));
if (m_ReadDone) {
// We could be closing because of an unexpected keep-alive
// failure, ie we pipelined a few requests and in the middle
// the remote server stopped doing keep alive. In this
// case m_Error could be success, which would be misleading.
// So in that case we'll set it to connection closed.
if (m_Error == WebExceptionStatus.Success) {
// Only reason we could have gotten here is because
// we're not keeping the connection alive.
GlobalLog.Assert(!m_KeepAlive,
"WriteStartNextRequest: m_KeepAlive is true",
"Closing connection with both keepalive true and m_Error == success"
);
m_Error = WebExceptionStatus.KeepAliveFailure;
}
// CloseConnectionSocket is called with the critical section
// held. Note that we know since it's not a keep-alive
// connection the read half wouldn't have posted a receive
// for this connection, so it's OK to call
// CloseConnectionSocket now.
CloseConnectionSocket(m_Error, ref returnResult);
}
else {
if (m_Error!=WebExceptionStatus.Success) {
GlobalLog.Print("Connection#" + ValidationHelper.HashString(this) + "::WriteStartNextRequest() Send Failire");
}
Monitor.Exit(this);
}
GlobalLog.Leave("Connection#" + ValidationHelper.HashString(this) + "::WriteStartNextRequest[2]");
return;
}
// If we're pipelining, we get get the next request going
// as soon as the write is done. Otherwise we have to wait
// until both read and write are done.
if (m_Pipelining || m_ReadDone) {
NextRequest = CheckNextRequest();
}
if (NextRequest != null) {
// need to disable read done, since we're about to post
// another read callback, and add a request
if (m_WriteList.Count == 0) {
m_ReadDone = false;
}
StartRequest(NextRequest, false);
}
else {
Monitor.Exit(this);
}
GlobalLog.Leave("Connection#" + ValidationHelper.HashString(this) + "::WriteStartNextRequest");
}
//
// this API is called by ConnectStream, only when resubmitting
// so we sent the headers already in HttpWebRequest.EndSubmitRequest()
// which calls ConnectStream.WriteHeaders()
// only after it queues async call to HttpWebRequest.EndWriteHeaders()
// which calls ConnectStream.ResubmitWrite()
// which calls in here
//
internal void Write(ScatterGatherBuffers writeBuffer) {
//
// parameter validation
//
GlobalLog.Assert(
writeBuffer!=null,
"writeBuffer==null",
"Connection.Write(ScatterGatherBuffers) - failed internal parameter validation" );
GlobalLog.Enter("Connection#" + ValidationHelper.HashString(this) + "::Write(ScatterGatherBuffers) cnt#" + ValidationHelper.HashString(this) + "trns#" + ValidationHelper.HashString(Transport));
NetworkStream chkTransport = Transport;
if (chkTransport==null) {
Exception exception = new IOException(SR.GetString(SR.net_io_writefailure));
GlobalLog.LeaveException("Connection#" + ValidationHelper.HashString(this) + "::Write(ScatterGatherBuffers)", exception);
throw exception;
}
try {
//
// set up array for MultipleWrite call
// note that GetBuffers returns null if we never wrote to it.
//
BufferOffsetSize[] buffers = writeBuffer.GetBuffers();
if (buffers!=null) {
//
// when buffering this write will happend on a worker thread, so for async
// operating apps, this will not block
//
IAsyncResult asyncResult = chkTransport.BeginMultipleWrite(buffers, null, null);
chkTransport.EndMultipleWrite(asyncResult);
}
}
catch (Exception exception) {
m_Error = WebExceptionStatus.SendFailure;
GlobalLog.LeaveException("Connection#" + ValidationHelper.HashString(this) + "::Write(ScatterGatherBuffers)", exception);
throw;
}
GlobalLog.Leave("Connection#" + ValidationHelper.HashString(this) + "::Write(ScatterGatherBuffers) this:" + ValidationHelper.HashString(this) + " writeBuffer.Size:" + writeBuffer.Length.ToString());
}
//
// called by HttpWebRequest if AllowWriteStreamBuffering is true on that instance
//
internal void EnableWriteBuffering() {
if (m_WriteStream && BufferedData==null) {
//
// create stream on demand, only if needed
//
GlobalLog.Print("ConnectStream#" + ValidationHelper.HashString(this) + "::WriteBufferEnable_set() Write() creating ScatterGatherBuffers");
BufferedData = new ScatterGatherBuffers();
}
m_WriteBufferEnable = true;
}
internal int SetResponse(WebResponse response) {
ContentLength = response.ContentLength;
if (ContentLength == -1 || ContentLength > DefaultDownloadBufferLength) {
Length = DefaultDownloadBufferLength; // Read buffer length
} else {
Length = ContentLength; // Read buffer length
}
// If we are not writing to a stream, we are accumulating in memory
if (WriteStream == null) {
// We are putting a cap on the size we will accumulate in memory
if (ContentLength > Int32.MaxValue)
{
throw new WebException(SR.GetString(SR.net_webstatus_MessageLengthLimitExceeded), WebExceptionStatus.MessageLengthLimitExceeded);
}
SgBuffers = new ScatterGatherBuffers(Length); // Write buffer
}
InnerBuffer = new byte[(int)Length];
ReadStream = response.GetResponseStream();
if (Async && response.ContentLength >= 0)
Progress.TotalBytesToReceive = response.ContentLength;
if (Async) {
if (ReadStream == null || ReadStream == Stream.Null)
DownloadBitsReadCallbackState(this, null);
else
ReadStream.BeginRead(InnerBuffer, Offset, (int)Length-Offset, new AsyncCallback(DownloadBitsReadCallback), this);
} else {
if (ReadStream == null || ReadStream == Stream.Null)
return 0;
else
return ReadStream.Read(InnerBuffer, Offset, (int)Length-Offset);
}
return -1;
}
internal int SetResponse(WebResponse response)
{
this.ContentLength = response.ContentLength;
if ((this.ContentLength == -1L) || (this.ContentLength > 0x10000L))
{
this.Length = 0x10000L;
}
else
{
this.Length = this.ContentLength;
}
if (this.WriteStream == null)
{
if (this.ContentLength > 0x7fffffffL)
{
throw new WebException(SR.GetString("net_webstatus_MessageLengthLimitExceeded"), WebExceptionStatus.MessageLengthLimitExceeded);
}
this.SgBuffers = new ScatterGatherBuffers(this.Length);
}
this.InnerBuffer = new byte[(int) this.Length];
this.ReadStream = response.GetResponseStream();
if (this.Async && (response.ContentLength >= 0L))
{
this.Progress.TotalBytesToReceive = response.ContentLength;
}
if (this.Async)
{
if ((this.ReadStream == null) || (this.ReadStream == Stream.Null))
{
System.Net.WebClient.DownloadBitsReadCallbackState(this, null);
}
else
{
this.ReadStream.BeginRead(this.InnerBuffer, this.Offset, ((int) this.Length) - this.Offset, new AsyncCallback(System.Net.WebClient.DownloadBitsReadCallback), this);
}
return -1;
}
if ((this.ReadStream != null) && (this.ReadStream != Stream.Null))
{
return this.ReadStream.Read(this.InnerBuffer, this.Offset, ((int) this.Length) - this.Offset);
}
return 0;
}
