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# UWP/WinRT Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
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
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
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# UWP/WinRT) Read Bitfinex WebSocket Ticker Channel

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

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

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

Chilkat.WebSocket ws = new Chilkat.WebSocket();

//  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.

Chilkat.Rest rest = new Chilkat.Rest();

//  Connect to api.bitfinex.com
bool success = await rest.ConnectAsync("api.bitfinex.com",443,true,false);
ws.UseConnection(rest);
ws.AddClientHeaders();

string responseBody = await rest.FullRequestNoBodyAsync("GET","/ws");
success = ws.ValidateServerHandshake();
if (success != true) {
    Debug.WriteLine(ws.LastErrorText);
    Debug.WriteLine(responseBody);
    Debug.WriteLine(rest.ResponseHeader);
    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 = await ws.ReadFrameAsync();
if (success != true) {
    Debug.WriteLine("Failed to receive a frame");
    Debug.WriteLine("ReadFrame fail reason = " + Convert.ToString(ws.ReadFrameFailReason));
    Debug.WriteLine(ws.LastErrorText);
    return;
}

//  We should get this:
//  {"event":"info","version":1.1,"platform":{"status":1}}
Debug.WriteLine(ws.GetFrameData());

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

bool finalFrame = true;
success = await ws.SendFrameAsync(json.Emit(),finalFrame);

//  Read the response.
success = await ws.ReadFrameAsync();
if (success != true) {
    Debug.WriteLine("Failed to receive a frame");
    Debug.WriteLine("ReadFrame fail reason = " + Convert.ToString(ws.ReadFrameFailReason));
    Debug.WriteLine(ws.LastErrorText);
    return;
}

//  Examine the response
//  We should get this:
//  {"event":"subscribed","channel":"ticker","chanId":2751,"pair":"BTCUSD"}
Debug.WriteLine(ws.GetFrameData());

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

    success = await ws.ReadFrameAsync();
    if (success != true) {
        Debug.WriteLine("Failed to receive a frame");
        Debug.WriteLine("ReadFrame fail reason = " + Convert.ToString(ws.ReadFrameFailReason));
        Debug.WriteLine(ws.LastErrorText);
        return;
    }

    //  The responses we desire are in Text frames, where the opcode = 1.
    if (ws.FrameOpcodeInt == 1) {
        string receivedText = ws.GetFrameData();
        Debug.WriteLine(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 = await ws.SendCloseAsync(true,1000,"Closing this websocket.");
if (success != true) {
    Debug.WriteLine(ws.LastErrorText);
    return;
}

//  Read the Close response.
success = await ws.ReadFrameAsync();
if (success != true) {
    Debug.WriteLine("ReadFrame fail reason = " + Convert.ToString(ws.ReadFrameFailReason));
    Debug.WriteLine(ws.LastErrorText);
    return;
}

Debug.WriteLine("Success.");

 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.