docs

Init context

open( filePath, [mode] )

k6

check( val, sets, [tags] )
fail( [err] )
group( name, fn )
randomSeed( int )
sleep( t )

k6/crypto

createHash( algorithm )
createHMAC( algorithm, secret )
hmac( algorithm, secret, data, outputEncoding )
md4( input, outputEncoding )
md5( input, outputEncoding )
randomBytes( int )
ripemd160( input, outputEncoding )
sha1( input, outputEncoding )
sha256( input, outputEncoding )
sha384( input, outputEncoding )
sha512( input, outputEncoding )
sha512_256( input, outputEncoding )
sha512_224( input, outputEncoding )
Hasher

k6/data

SharedArray

k6/encoding

b64decode( input, [encoding], [format] )
b64encode( input, [encoding] )

k6/execution

k6/experimental

browser
grpc
redis
timers
tracing
websockets
webcrypto

k6/html

parseHTML( src )
Element
Selection

k6/http

asyncRequest( method, url, [body], [params] )
batch( requests )
cookieJar()
del( url, [body], [params] )
file( data, [filename], [contentType] )
get( url, [params] )
head( url, [params] )
options( url, [body], [params] )
patch( url, [body], [params] )
post( url, [body], [params] )
put( url, [body], [params] )
request( method, url, [body], [params] )
setResponseCallback( callback )
url`url`
expectedStatuses( statuses )
CookieJar
FileData
Params
Response

k6/metrics

Counter
Gauge
Rate
Trend

k6/net/grpc

Client
Params
Response
Constants

k6/ws

connect( url, params, callback )
Params
Socket

Error Codes

k6.ioapp.k6.io

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Socket.ping()

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A module with a better and standard API exists

The new k6/experimental/websockets API partially implements the WebSockets API living standard.

When possible, we recommend using the new API. It uses a global event loop for consistency with other k6 APIs and better performance.

Send a ping. Ping messages can be used to verify that the remote endpoint is responsive.

Example

import ws from 'k6/ws';


export default function () {
  const url = 'ws://echo.websocket.org';
  const response = ws.connect(url, null, function (socket) {
    socket.on('open', function () {
      socket.on('pong', function () {
        // As required by the spec, when the ping is received, the recipient must send back a pong.
        console.log('connection is alive');
      });


      socket.ping();
    });
  });
}