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// -*- C++ -*-
// $Id$
// Ossama Othman <ossama@uci.edu>
#include "ace/FILE_Connector.h"
#include "ace/Log_Msg.h"
#include "Callback_Handler.h"
ACE_RCSID (AMI_Observer, Callback_Handler, "$Id$")
Callback_Handler::Callback_Handler (const char *pathname,
Web_Server::Callback_ptr client_callback)
: file_ (pathname),
file_io_ (),
callback_ (Web_Server::Callback::_duplicate (client_callback)),
ami_handler_ (),
chunk_ (new Web_Server::Chunk_Type),
chunk_index_ (0),
last_chunk_ (0)
{
// Nothing else
}
Callback_Handler::~Callback_Handler (void)
{
// Nothing else
}
void
Callback_Handler::next_chunk (void)
{
if (this->last_chunk_ == 1)
{
this->deactivate ();
return;
}
// Allocate a buffer for the file being read.
CORBA::Octet *buf =
Web_Server::Chunk_Type::allocbuf (BUFSIZ);
if (buf == 0)
throw CORBA::NO_MEMORY ();
ssize_t bytes_read = this->file_io_.recv (buf,
BUFSIZ);
if (bytes_read == -1)
{
Web_Server::Chunk_Type::freebuf (buf);
throw CORBA::INTERNAL ();
}
else if (bytes_read == 0)
{
Web_Server::Chunk_Type::freebuf (buf);
this->last_chunk_ = 1;
}
else
{
this->chunk_index_++;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Sending chunk %d from %s of size <%d>\n"),
this->chunk_index_,
this->file_.get_path_name (),
bytes_read));
// Place the contents of the buffer into the outgoing octet
// sequence. Only replace the amount of data actually read.
this->chunk_->replace (bytes_read,
bytes_read,
buf,
1); // The sequence releases memory for us.
}
this->callback_->sendc_next_chunk (this->ami_handler_.in (),
this->chunk_.in (),
this->last_chunk_);
}
void
Callback_Handler::next_chunk_excep
(::Messaging::ExceptionHolder *excep_holder)
{
this->last_chunk_ = 1;
try
{
this->deactivate ();
excep_holder->raise_exception ();
}
catch (const CORBA::Exception& ex)
{
ex._tao_print_exception (
ACE_TEXT ("Exception occured during ")
ACE_TEXT ("sendc_next_chunk() call:"));
}
}
void
Callback_Handler::run (void)
{
// Open the file to be downloaded
this->open_file ();
// Activate this Reply Handler.
this->ami_handler_ = this->_this ();
// Begin the asynchronous invocation. Note that the AMI
// "sendc_next_chunk()" call is done within the following call,
// since data must first be read into the Chunk.
this->next_chunk ();
}
void
Callback_Handler::open_file (void)
{
// Create a temporary file to store the retrieved data.
ACE_FILE_Connector connector;
if (connector.connect (this->file_io_,
this->file_,
0,
ACE_Addr::sap_any,
0,
O_RDONLY) == -1)
// HTTP 1.1 "Not Found"
throw Web_Server::Error_Result (404);
}
void
Callback_Handler::deactivate (void)
{
// Close the file that was sent to the client.
(void) this->file_io_.close ();
// Get the POA used when activating the Reply Handler object.
PortableServer::POA_var poa = this->_default_POA ();
// Get the object ID associated with this servant.
PortableServer::ObjectId_var oid =
poa->servant_to_id (this);
// Now deactivate the AMI_CallbackHandler object.
poa->deactivate_object (oid.in ());
}
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