websocket

Type:

Connects to a websocket server and continuously receives messages.

  • Common

  • Advanced

# Common config fields, showing default values
input:
  label: ""
  websocket:
    url: ws://localhost:4195/get/ws # No default (required)
    auto_replay_nacks: true
# All config fields, showing default values
input:
  label: ""
  websocket:
    url: ws://localhost:4195/get/ws # No default (required)
    open_message: "" # No default (optional)
    open_message_type: binary
    auto_replay_nacks: true
    tls:
      enabled: false
      skip_cert_verify: false
      enable_renegotiation: false
      root_cas: ""
      root_cas_file: ""
      client_certs: []
    connection:
      max_retries: -1 # No default (optional)
    oauth:
      enabled: false
      consumer_key: ""
      consumer_secret: ""
      access_token: ""
      access_token_secret: ""
    basic_auth:
      enabled: false
      username: ""
      password: ""
    jwt:
      enabled: false
      private_key_file: ""
      signing_method: ""
      claims: {}
      headers: {}

It is possible to configure an open_message, which when set to a non-empty string will be sent to the websocket server each time a connection is first established.

Fields

url

The URL to connect to.

Type: string

# Examples

url: ws://localhost:4195/get/ws

open_message

An optional message to send to the server upon connection.

Type: string

open_message_type

An optional flag to indicate the data type of open_message.

Type: string

Default: "binary"

Option Summary

binary

Binary data open_message.

text

Text data open_message. The text message payload is interpreted as UTF-8 encoded text data.

auto_replay_nacks

Whether messages that are rejected (nacked) at the output level should be automatically replayed indefinitely, eventually resulting in back pressure if the cause of the rejections is persistent. If set to false these messages will instead be deleted. Disabling auto replays can greatly improve memory efficiency of high throughput streams as the original shape of the data can be discarded immediately upon consumption and mutation.

Type: bool

Default: true

tls

Custom TLS settings can be used to override system defaults.

Type: object

tls.enabled

Whether custom TLS settings are enabled.

Type: bool

Default: false

tls.skip_cert_verify

Whether to skip server side certificate verification.

Type: bool

Default: false

tls.enable_renegotiation

Whether to allow the remote server to repeatedly request renegotiation. Enable this option if you’re seeing the error message local error: tls: no renegotiation.

Type: bool

Default: false Requires version 3.45.0 or newer

tls.root_cas

An optional root certificate authority to use. This is a string, representing a certificate chain from the parent trusted root certificate, to possible intermediate signing certificates, to the host certificate.

This field contains sensitive information that usually shouldn’t be added to a config directly, read our secrets page for more info.

Type: string

Default: ""

# Examples

root_cas: |-
  -----BEGIN CERTIFICATE-----
  ...
  -----END CERTIFICATE-----

tls.root_cas_file

An optional path of a root certificate authority file to use. This is a file, often with a .pem extension, containing a certificate chain from the parent trusted root certificate, to possible intermediate signing certificates, to the host certificate.

Type: string

Default: ""

# Examples

root_cas_file: ./root_cas.pem

tls.client_certs

A list of client certificates to use. For each certificate either the fields cert and key, or cert_file and key_file should be specified, but not both.

Type: array

Default: []

# Examples

client_certs:
  - cert: foo
    key: bar

client_certs:
  - cert_file: ./example.pem
    key_file: ./example.key

tls.client_certs[].cert

A plain text certificate to use.

Type: string

Default: ""

tls.client_certs[].key

A plain text certificate key to use.

This field contains sensitive information that usually shouldn’t be added to a config directly, read our secrets page for more info.

Type: string

Default: ""

tls.client_certs[].cert_file

The path of a certificate to use.

Type: string

Default: ""

tls.client_certs[].key_file

The path of a certificate key to use.

Type: string

Default: ""

tls.client_certs[].password

A plain text password for when the private key is password encrypted in PKCS#1 or PKCS#8 format. The obsolete pbeWithMD5AndDES-CBC algorithm is not supported for the PKCS#8 format. Warning: Since it does not authenticate the ciphertext, it is vulnerable to padding oracle attacks that can let an attacker recover the plaintext.

This field contains sensitive information that usually shouldn’t be added to a config directly, read our secrets page for more info.

Type: string

Default: ""

# Examples

password: foo

password: ${KEY_PASSWORD}

connection

Customise how websocket connection attempts are made.

Type: object

connection.max_retries

An optional limit to the number of consecutive retry attempts that will be made before abandoning the connection altogether and gracefully terminating the input. When all inputs terminate in this way the service (or stream) will shut down. If set to zero connections will never be reattempted upon a failure. If set below zero this field is ignored (effectively unset).

Type: int

# Examples

max_retries: -1

max_retries: 10

oauth

Allows you to specify open authentication via OAuth version 1.

Type: object

oauth.enabled

Whether to use OAuth version 1 in requests.

Type: bool

Default: false

oauth.consumer_key

A value used to identify the client to the service provider.

Type: string

Default: ""

oauth.consumer_secret

A secret used to establish ownership of the consumer key.

This field contains sensitive information that usually shouldn’t be added to a config directly, read our secrets page for more info.

Type: string

Default: ""

oauth.access_token

A value used to gain access to the protected resources on behalf of the user.

Type: string

Default: ""

oauth.access_token_secret

A secret provided in order to establish ownership of a given access token.

This field contains sensitive information that usually shouldn’t be added to a config directly, read our secrets page for more info.

Type: string

Default: ""

basic_auth

Allows you to specify basic authentication.

Type: object

basic_auth.enabled

Whether to use basic authentication in requests.

Type: bool

Default: false

basic_auth.username

A username to authenticate as.

Type: string

Default: ""

basic_auth.password

A password to authenticate with.

This field contains sensitive information that usually shouldn’t be added to a config directly, read our secrets page for more info.

Type: string

Default: ""

jwt

Allows you to specify JWT authentication.

Type: object

jwt.enabled

Whether to use JWT authentication in requests.

Type: bool

Default: false

jwt.private_key_file

A file with the PEM encoded via PKCS1 or PKCS8 as private key.

Type: string

Default: ""

jwt.signing_method

A method used to sign the token such as RS256, RS384, RS512 or EdDSA.

Type: string

Default: ""

jwt.claims

A value used to identify the claims that issued the JWT.

Type: object

Default: {}

jwt.headers

Add optional key/value headers to the JWT.

Type: object

Default: {}