Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

C Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
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
MS Storage Providers
Microsoft Graph
NTLM
OAuth1
OAuth2
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
PDF Signatures
PEM
PFX/P12
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(C) Read Bitfinex WebSocket Ticker Channel

Subscribes to the public Bitfinex websocket ticker channel and receives ticker updates.

Chilkat C/C++ Library Downloads

MS Visual C/C++

Linux/CentOS C/C++

Alpine Linux C/C++

MAC OS X C/C++

armhf/aarch64 C/C++

C++ Builder

iOS C/C++

Android C/C++

Win Mobile 5.0/Pocket PC 2003

Solaris C/C++

FreeBSD C/C++

OpenBSD C/C++

MinGW C/C++

#include <C_CkWebSocket.h>
#include <C_CkRest.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkWebSocket ws;
    HCkRest rest;
    BOOL success;
    const char *responseBody;
    HCkJsonObject json;
    BOOL finalFrame;
    BOOL receivedFinalFrame;
    int numUpdatesReceived;
    const char *receivedText;

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

    ws = CkWebSocket_Create();

    //  For brevity, this example does not check for errors when etablishing the WebSocket connection.
    //  See Establish WebSocket Connection for more complete sample code for making the connection.

    rest = CkRest_Create();

    //  Connect to api.bitfinex.com
    success = CkRest_Connect(rest,"api.bitfinex.com",443,TRUE,FALSE);
    CkWebSocket_UseConnection(ws,rest);
    CkWebSocket_AddClientHeaders(ws);

    responseBody = CkRest_fullRequestNoBody(rest,"GET","/ws");
    success = CkWebSocket_ValidateServerHandshake(ws);
    if (success != TRUE) {
        printf("%s\n",CkWebSocket_lastErrorText(ws));
        printf("%s\n",responseBody);
        printf("%s\n",CkRest_responseHeader(rest));
        CkWebSocket_Dispose(ws);
        CkRest_Dispose(rest);
        return;
    }

    //  After connecting, the bitfinex websocket server will send
    //  an info message that contains the actual version of the websocket stream.
    //  Receive that message..
    success = CkWebSocket_ReadFrame(ws);
    if (success != TRUE) {
        printf("Failed to receive a frame\n");
        printf("ReadFrame fail reason = %d\n",CkWebSocket_getReadFrameFailReason(ws));
        printf("%s\n",CkWebSocket_lastErrorText(ws));
        CkWebSocket_Dispose(ws);
        CkRest_Dispose(rest);
        return;
    }

    //  We should get this:
    //  {"event":"info","version":1.1,"platform":{"status":1}}
    printf("%s\n",CkWebSocket_getFrameData(ws));

    //  Subscribe to the public ticker feed.
    //  See https://docs.bitfinex.com/docs for more information.
    json = CkJsonObject_Create();
    CkJsonObject_AppendString(json,"event","subscribe");
    CkJsonObject_AppendString(json,"channel","ticker");
    CkJsonObject_AppendString(json,"pair","BTCUSD");

    finalFrame = TRUE;
    success = CkWebSocket_SendFrame(ws,CkJsonObject_emit(json),finalFrame);

    //  Read the response.
    success = CkWebSocket_ReadFrame(ws);
    if (success != TRUE) {
        printf("Failed to receive a frame\n");
        printf("ReadFrame fail reason = %d\n",CkWebSocket_getReadFrameFailReason(ws));
        printf("%s\n",CkWebSocket_lastErrorText(ws));
        CkWebSocket_Dispose(ws);
        CkRest_Dispose(rest);
        CkJsonObject_Dispose(json);
        return;
    }

    //  Examine the response
    //  We should get this:
    //  {"event":"subscribed","channel":"ticker","chanId":2751,"pair":"BTCUSD"}
    printf("%s\n",CkWebSocket_getFrameData(ws));

    //  Begin reading the ticker feed.
    //  We'll just read the 1st 5 updates and then exit..
    receivedFinalFrame = FALSE;
    numUpdatesReceived = 0;
    while (numUpdatesReceived < 5) {

        success = CkWebSocket_ReadFrame(ws);
        if (success != TRUE) {
            printf("Failed to receive a frame\n");
            printf("ReadFrame fail reason = %d\n",CkWebSocket_getReadFrameFailReason(ws));
            printf("%s\n",CkWebSocket_lastErrorText(ws));
            CkWebSocket_Dispose(ws);
            CkRest_Dispose(rest);
            CkJsonObject_Dispose(json);
            return;
        }

        //  The responses we desire are in Text frames, where the opcode = 1.
        if (CkWebSocket_getFrameOpcodeInt(ws) == 1) {
            receivedText = CkWebSocket_getFrameData(ws);
            printf("%s\n",receivedText);
            //  Should receive a line of text such as this:
            //  [2751,7349,36.34269559,7349.1,41.01777063,-116.2,-0.0156,7349.1,22188.26055319,7560,7270.5]
            numUpdatesReceived = numUpdatesReceived + 1;
        }

    }

    //  Close the websocket connection.
    success = CkWebSocket_SendClose(ws,TRUE,1000,"Closing this websocket.");
    if (success != TRUE) {
        printf("%s\n",CkWebSocket_lastErrorText(ws));
        CkWebSocket_Dispose(ws);
        CkRest_Dispose(rest);
        CkJsonObject_Dispose(json);
        return;
    }

    //  Read the Close response.
    success = CkWebSocket_ReadFrame(ws);
    if (success != TRUE) {
        printf("ReadFrame fail reason = %d\n",CkWebSocket_getReadFrameFailReason(ws));
        printf("%s\n",CkWebSocket_lastErrorText(ws));
        CkWebSocket_Dispose(ws);
        CkRest_Dispose(rest);
        CkJsonObject_Dispose(json);
        return;
    }

    printf("Success.\n");


    CkWebSocket_Dispose(ws);
    CkRest_Dispose(rest);
    CkJsonObject_Dispose(json);

    }

 

© 2000-2021 Chilkat Software, Inc. All Rights Reserved.