MBR IT/.NET 247 : NOT ANSWERED: Stream.Read never seems to get all of the data on ASPFriends.com 'ngfx-io' list

NOT ANSWERED: Stream.Read never seems to get all of the data

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Devin Rader

I am tring to perform an HTTP GET using the TcpClient and am having
problems. The Read method only seems to actually read a small portion of
what the BufferSize says it is.

TcpClient t = new TcpClient();
t.Connect("www.mysite.com",80);

NetworkStream nStream = t.GetStream();
string sToSend = "GET /somepage.asp HTTP/1.0\r\n\r\n";

byte[] bData = Encoding.ASCII.GetBytes(sToSend.ToCharArray());
nStream.Write( bData,0,bData.Length );

byte[] re = new byte[t.ReceiveBufferSize];
int bS = t.ReceiveBufferSize; <--BufferSize is like 8000
int bytesread = nStream.Read(re,0,t.ReceiveBufferSize); <--bytesread is
liek 450

It only seems to be reading enough to get the page headers and thats it.

Any ideas what I am doing wrong?

Thanks!

Devin

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Mitch Denny (VIP)

Devin,

The Read(...) method can only retrieve data that has actually
arrived, and it is a non-blocking method, so even though you
have said you want to read in 8000 bytes, you only get the
300 or so that are available.

This is a reality of network programming, you need to go
back and get more data from the input buffer from time to
time. If you just want to do a simple get then I would
consder looking at a class like HttpWebRequest which works
are a higher level and handles alot of this for you for free.

----------------------------------------
- Mitch Denny
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- +61 (414) 610-141
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-----Original Message-----
From: Devin Rader [mailto:Click here to reveal e-mail address]
Sent: Thursday, 2 May 2002 04:13
To: ngfx-io
Subject: [ngfx-io] NOT ANSWERED: Stream.Read never seems to get all of
the data

I am tring to perform an HTTP GET using the TcpClient and am having
problems. The Read method only seems to actually read a small portion
of what the BufferSize says it is.
TcpClient t = new TcpClient();
t.Connect("www.mysite.com",80);
NetworkStream nStream = t.GetStream();
string sToSend = "GET /somepage.asp HTTP/1.0\r\n\r\n";
byte[] bData = Encoding.ASCII.GetBytes(sToSend.ToCharArray());
nStream.Write( bData,0,bData.Length );
byte[] re = new byte[t.ReceiveBufferSize];
int bS = t.ReceiveBufferSize; <--BufferSize is like 8000
int bytesread = nStream.Read(re,0,t.ReceiveBufferSize); <--bytesread is
liek 450
It only seems to be reading enough to get the page headers and thats it.

Any ideas what I am doing wrong?
Thanks!
Devin
| [ngfx-io] member Click here to reveal e-mail address = YOUR ID |
http://www.aspfriends.com/aspfriends/ngfx-io.asp = JOIN/QUIT
| [ngfx-io] member Click here to reveal e-mail address = YOUR ID |
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Reply to this message...

	System.IO.Stream
	System.Net.HttpWebRequest
	System.Net.Sockets.NetworkStream
	System.Net.Sockets.TcpClient
	System.Text.Encoding

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