Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3/4TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

MFC Examples

Web API Categories

ASN.1
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
Geolocation
Google APIs
Google Calendar
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text

HTTP
HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
REST
REST Misc
RSA Encryption
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(MFC) Transfer a File using Sockets (TLS or non-TLS)

Demonstrates how to two programs, one a socket writer and the other a socket reader, can transfer a file. The connection can be TLS or a regular non-encrypted TCP connection.

Chilkat C/C++ Library Downloads

MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkBinData.h>
#include <CkSocket.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // On the sending side, we'll load the file into a BinData object and send.
    // On the receiving side, we'll read from the socket connection into a BinData, and save to a file.
    // This example assumes the file is not crazy-large, and that the entire contents
    // can fit into memory.  
    // (If the file is too large for memory, there are other ways to send. It just involves streaming or 
    // sending the file chunk-by-chunk..)

    // This section of code is for the sender.
    CkBinData bdToSend;
    bool success = bdToSend.LoadFile("somePath/someFile.dat");
    // Assume success for the example...

    CkSocket sndSock;
    bool bUseTls = true;
    int port = 5555;
    int maxWaitMs = 5000;
    success = sndSock.Connect("some_domain_or_ip.com",port,bUseTls,maxWaitMs);
    // Assume success for the example...

    // Tell the receiver how many bytes are coming.
    int numBytes = bdToSend.get_NumBytes();
    bool bBigEndian = true;
    success = sndSock.SendInt32(numBytes,bBigEndian);

    // Send the file data (sends the entire contents of bdToSend).
    success = sndSock.SendBd(bdToSend,0,0);

    // Get an acknowledgement.
    success = sndSock.ReceiveInt32(bBigEndian);
    if (success != true) {
        strOut.append(sndSock.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Did the receiver get the correct number of bytes?
    if (sndSock.get_ReceivedInt() != numBytes) {
        strOut.append("The receiver did not acknowledge with the correct number of bytes.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("File sent!");
    strOut.append("\r\n");

    // ------------------------------------------------------------------------------------
    // The code below is for the receiving side (running on some other computer..)

    CkSocket listenSock;

    success = listenSock.BindAndListen(5555,25);
    if (success != true) {
        strOut.append(listenSock.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Get the next incoming connection
    // Wait a maximum of 20 seconds (20000 millisec)
    CkSocket *rcvSock = 0;
    rcvSock = listenSock.AcceptNextConnection(20000);
    if (listenSock.get_LastMethodSuccess() == false) {
        strOut.append(listenSock.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // The sender will first send the big-endian integer for the number of bytes
    // that are forthcoming..
    success = rcvSock->ReceiveInt32(bBigEndian);
    if (success != true) {
        strOut.append(rcvSock->lastErrorText());
        strOut.append("\r\n");
        delete rcvSock;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    int numBytesComing = rcvSock->get_ReceivedInt();

    // Receive that many bytes..
    CkBinData bdReceived;
    success = rcvSock->ReceiveBdN(numBytesComing,bdReceived);
    if (success != true) {
        strOut.append(rcvSock->lastErrorText());
        strOut.append("\r\n");
        delete rcvSock;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Acknowledge the sender by sending back the number of bytes we received.
    success = rcvSock->SendInt32(bdReceived.get_NumBytes(),bBigEndian);

    // Close the connection.
    int maxWaitMs = 20;
    rcvSock->Close(maxWaitMs);
    delete rcvSock;

    // Save the received data to a file.
    success = bdReceived.WriteFile("somePath/someFile.dat");
    // Assume success for the example...

    strOut.append("File received!");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

© 2000-2019 Chilkat Software, Inc. All Rights Reserved.