Huge File read and send via socket

From:
"Ganesh" <gvijayaratnam@gmail.com>
Newsgroups:
microsoft.public.cn.vc++,microsoft.public.usasalesinfo.developer.visualc++,microsoft.public.vc.language,microsoft.public.vc.stl
Date:
Wed, 23 Jan 2008 12:03:24 +0530
Message-ID:
<#KfMenYXIHA.4448@TK2MSFTNGP03.phx.gbl>
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Hi all,

I am new to c++ and socket programming, I have a situvation that my =
function have to a binary read ( whole file as 1 chunk ) and keep the =
buffer, and send the buffrer via socket by chunk by chunk as user =
specified. I have written a code sample, but I am not getting the =
correct out out.

can some one pls look in to the code and fix it ?

FILE *fp23 = fopen( "c:\\hpfile.prn", "rb" );

fseek (fp23 , 0 , SEEK_END);
int m_jobSize = ftell (fp23);
rewind (fp23);

char* m_buffer = new char[m_jobSize+1];

int m_result = fread( m_buffer, 1, m_jobSize, fp23 );

///////////////////////////////////////////////

 int BytesIndex = 0;

 while( bufsize > 0)
 {

  // Send some bytes
  if ( bufsize < (unsigned long)iSendStatus )
  {
   iSendStatus = send(*sock, &m_buffer[BytesIndex], bufsize, 0); // =
Socket is of type
   
   //
   // Call Back Function
   //
   set += iSendStatus;
   ptr(jobid,set);
   

   if ( iSendStatus != bufsize )
   {
    cpError = SocketErrorHandler();
    return cpError;
   }

  }
  else
  {
   iSendStatus = send(*sock, &m_buffer[BytesIndex], chunkSize, 0); // =
Socket is of type

   //
   // Call Back Function
   //
   set += iSendStatus;
   ptr(jobid,set);

   if ( iSendStatus != chunkSize )
   {
    cpError = SocketErrorHandler();
    return cpError;
   }
 
  }

  // Update buffer and counter
  if ( bufsize < (unsigned long)iSendStatus )
  {
   bufsize -= bufsize;
   BytesIndex += bufsize;
  }
  else
  {
   bufsize -= iSendStatus;
   BytesIndex +=iSendStatus;
  }

//////////////////////////////

regards
Ganesh

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<BODY>
<DIV><FONT face=Arial size=2>Hi all,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>I am new to c++ and socket programming, =
I have a
situvation that my function have to a binary read ( whole file as 1 =
chunk ) and
keep the buffer,&nbsp;and send the buffrer via socket by chunk by chunk =
as user
specified. I have written a code sample, but I am not getting the =
correct out
out.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>can some one pls look in to the code =
and fix it
?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>FILE *fp23 = fopen( =
"c:\\hpfile.prn", "rb"
);</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>fseek (fp23 , 0 , =
SEEK_END);<BR>int
m_jobSize = ftell (fp23);<BR>rewind (fp23);</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>char* m_buffer = new
char[m_jobSize+1];</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>int m_result = fread( =
m_buffer, 1,
m_jobSize, fp23 );</FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New"
size=2>///////////////////////////////////////////////</FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>&nbsp;int BytesIndex = 0; =
</FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>&nbsp;while( bufsize &gt;
0)<BR>&nbsp;{</FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>&nbsp;&nbsp;// Send some
bytes<BR>&nbsp;&nbsp;if ( bufsize &lt; (unsigned long)iSendStatus
)<BR>&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;iSendStatus = send(*sock,
&amp;m_buffer[BytesIndex], bufsize, 0); // Socket is of
type<BR>&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;//<BR>&nbsp;&nbsp;&nbsp;/=
/ Call
Back Function<BR>&nbsp;&nbsp;&nbsp;//<BR>&nbsp;&nbsp;&nbsp;set +=
iSendStatus;<BR>&nbsp;&nbsp;&nbsp;ptr(jobid,set);<BR>&nbsp;&nbsp;&nbsp;</=
FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New" size=2>&nbsp;&nbsp;&nbsp;if ( =
iSendStatus !=
bufsize )<BR>&nbsp;&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;cpError =
SocketErrorHandler();<BR>&nbsp;&nbsp;&nbsp;&nbsp;return
cpError;<BR>&nbsp;&nbsp;&nbsp;}</FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New"
size=2>&nbsp;&nbsp;}<BR>&nbsp;&nbsp;else<BR>&nbsp;&nbsp;{<BR>&nbsp;&nbs=
p;&nbsp;iSendStatus
= send(*sock, &amp;m_buffer[BytesIndex], chunkSize, 0); // Socket is =
of
type</FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New"
size=2>&nbsp;&nbsp;&nbsp;//<BR>&nbsp;&nbsp;&nbsp;// Call Back
Function<BR>&nbsp;&nbsp;&nbsp;//<BR>&nbsp;&nbsp;&nbsp;set +=
iSendStatus;<BR>&nbsp;&nbsp;&nbsp;ptr(jobid,set);</FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV><FONT size=2>
<DIV><BR><FONT face="Courier New">&nbsp;&nbsp;&nbsp;if ( iSendStatus =
!=
chunkSize )<BR>&nbsp;&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;cpError =
=
SocketErrorHandler();<BR>&nbsp;&nbsp;&nbsp;&nbsp;return
cpError;<BR>&nbsp;&nbsp;&nbsp;}<BR>&nbsp;<BR>&nbsp;&nbsp;}</FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV>
<DIV><FONT face="Courier New">&nbsp;&nbsp;// Update buffer and
counter<BR>&nbsp;&nbsp;if ( bufsize &lt; (unsigned long)iSendStatus
)<BR>&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;bufsize -=
bufsize;<BR>&nbsp;&nbsp;&nbsp;BytesIndex +=
bufsize;<BR>&nbsp;&nbsp;}<BR>&nbsp;&nbsp;else<BR>&nbsp;&nbsp;{<BR>&nbsp;&=
nbsp;&nbsp;bufsize
-= iSendStatus; <BR>&nbsp;&nbsp;&nbsp;BytesIndex +=iSendStatus;
<BR>&nbsp;&nbsp;}</FONT></DIV>
<DIV><FONT face="Courier New"></FONT>&nbsp;</DIV>
<DIV><BR><FONT
face="Courier =
New">//////////////////////////////<BR></FONT></FONT></DIV>
<DIV><FONT face=Arial size=2>regards</FONT></DIV>
<DIV><FONT face=Arial size=2>Ganesh</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV></BODY></HTML>

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