Hello Everyone,
I have been looking around a lot to create a server app which can
accept multiple client connections and receive files. So far I have
combined a few examples and added lots of my own code to make it do
what I want so far, but at the moment I知 having trouble sending/
receiving an actual file. I知 just not sure on the best way to do it.
I致e provided parts of my code below. I知 just not sure the best way
to receive the file stream and re-create it in to the file again.
Any help would be greatly appreciated.
Client Code
I connect to the server using
m_socClient = new Socket
(AddressFamily.InterNetwork,SocketType.Stream ,ProtocolType.Tcp );
I can send normal text data to the server fine
Object Data = message.Text;
byte[] byData = System.Text.Encoding.ASCII.GetBytes(Data.ToString ());
m_socClient.Send (byData);
But now I want to send a file instead
m_socClient.SendFile(@"C:\NewDocument.doc");
So I do this, and it sends and the server recieves it, but displays it
as weird ASCII charactors in message received box (obviously). Is this
the best way to send a file?
The server Code
I listen on
m_socListener = new
Socket(AddressFamily.InterNetwork,SocketType.Strea m,ProtocolType.Tcp);
When the data is received
public void WaitForData(System.Net.Sockets.Socket soc)
{
if ( pfnWorkerCallBack == null )
{
pfnWorkerCallBack = new AsyncCallback (OnDataReceived);
}
CSocketPacket theSocPkt = new CSocketPacket ();
theSocPkt.thisSocket = soc;
// now start to listen for any data...
soc .BeginReceive (theSocPkt.dataBuffer ,
0,theSocPkt.dataBuffer.Length ,SocketFlags.None,pfnWorkerCallBack,theSocPkt);
}
public void OnDataReceived(IAsyncResult asyn)
{
CSocketPacket theSockId = (CSocketPacket)asyn.AsyncState ;
//end receive...
int iRx = 0 ;
iRx = theSockId.thisSocket.EndReceive (asyn);
char[] chars = new char[iRx + 1];
System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
int charLen = d.GetChars(theSockId.dataBuffer, 0, iRx, chars, 0);
System.String szData = new System.String(chars);
//Writes to textbox
txtDataRx.Text += status;
WaitForData(theSockId.thisSocket);
}
So how do I modify this to receive a file propperly?
Thanks in advance 3 5171
Bonzol wrote:
I have been looking around a lot to create a server app which can
accept multiple client connections and receive files. So far I have
combined a few examples and added lots of my own code to make it do
what I want so far, but at the moment I知 having trouble sending/
receiving an actual file. I知 just not sure on the best way to do it.
I致e provided parts of my code below. I知 just not sure the best way
to receive the file stream and re-create it in to the file again.
m_socClient = new Socket
(AddressFamily.InterNetwork,SocketType.Stream ,ProtocolType.Tcp );
I can send normal text data to the server fine
Object Data = message.Text;
Why object and not string ?
byte[] byData = System.Text.Encoding.ASCII.GetBytes(Data.ToString ());
m_socClient.Send (byData);
Encoding.ASCII will only work with characters in US ASCII.
I doubt that is your intention.
But now I want to send a file instead
m_socClient.SendFile(@"C:\NewDocument.doc");
char[] chars = new char[iRx + 1];
System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
Now you assume UTF-8 ?
int charLen = d.GetChars(theSockId.dataBuffer, 0, iRx, chars, 0);
System.String szData = new System.String(chars);
I suggest you fix the character set stuff and if it still fails post
the correct content and how it looks like with your code.
Arne
I suggest you fix the character set stuff and if it still fails post
the correct content and how it looks like with your code.
Better yet, change from string to byte arrays so there is no character set
conversion whatsoever, if you want a faithful copy.
>
Arne
Ben Voigt [C++ MVP] wrote:
>I suggest you fix the character set stuff and if it still fails post the correct content and how it looks like with your code.
Better yet, change from string to byte arrays so there is no character set
conversion whatsoever, if you want a faithful copy.
He is sending and receiving bytes.
But he has the data in a String, so he has to convert from
String to Bytes.
Arne This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
by: Lingyun Yang |
last post by:
*** post for FREE via your newsreader at post.newsfeed.com ***
Dear all,
I have a file it's binary data viewed in UltraEdit is
EF BB BF 0D 0A 3C .......
I want to read them into a int or long...
|
by: Abhishek |
last post by:
I have a problem transfering files using sockets from pocket pc(.net compact
c#) to desktop(not using .net just mfc and sockets 2 API). The socket
communication is not a issue and I am able to...
|
by: Stephan Steiner |
last post by:
Hi
Generally,
FileInfo fi = new FileInfo(path);
long size = fi.Length;
gets you the length of a file in bytes. However, when copying files, even
while the copy operation is still in...
|
by: Xarky |
last post by:
Hi,
I am downloading a GIF file(as a mail attachement) with this file
format, Content-Transfer-Encoding: base64;
Now I am writing the downloaded data to a file with this technique:
...
|
by: Nathan |
last post by:
I have an aspx page with a data grid, some textboxes, and an update button.
This page also has one html input element with type=file (not inside the data
grid and runat=server).
The update...
|
by: Alex |
last post by:
Hello,
I'm trying to write a little php script to transfert some
files from a server to clients (web/http).
It's working fin with small files. But transfering big files
(try on 1Gb) failed!...
|
by: David |
last post by:
I have googled to no avail on getting specifically what I'm looking for. I
have found plenty of full blown apps that implement some type of file
transfer but what I'm specifcally looking for is an...
|
by: tedpottel |
last post by:
Hi,
My program has the following code to transfer a binary file
f = open(pathanme+filename,'rb')
print "start transfer"
self.fthHandle.storbinary('STOR '+filename, f)
How can I do an ASCII...
|
by: fiona |
last post by:
Yucca Valley, CA, - October 2007: Catalyst Development Corporation,
publisher of SocketTools, SocketWrench and LogicGem, today announced
the release of Catalyst File Transfer .NET V5.0. For...
|
by: Thom Little |
last post by:
I need to transfer an XML file between an application on the client and the
server. This would in fact be a copy of the application's .config file.
HTML <input form=...would transfer the file...
|
by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
|
by: BarryA |
last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
|
by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
|
by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new...
| |