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http

Performs an HTTP request using a message batch as the request body, and replaces the original message parts with the body of the response.

# Common config fields, showing default values
label: ""
http:
  url: "" # No default (required)
  verb: POST
  headers: {}
  rate_limit: "" # No default (optional)
  timeout: 5s
  parallel: false

The rate_limit field can be used to specify a rate limit resource to cap the rate of requests across all parallel components service wide.

The URL and header values of this type can be dynamically set using function interpolations described here.

In order to map or encode the payload to a specific request body, and map the response back into the original payload instead of replacing it entirely, you can use the branch processor.

Response Codes​

Bento considers any response code between 200 and 299 inclusive to indicate a successful response, you can add more success status codes with the field successful_on.

When a request returns a response code within the backoff_on field it will be retried after increasing intervals.

When a request returns a response code within the drop_on field it will not be reattempted and is immediately considered a failed request.

Adding Metadata​

If the request returns an error response code this processor sets a metadata field http_status_code on the resulting message.

Use the field extract_headers to specify rules for which other headers should be copied into the resulting message from the response.

Error Handling​

When all retry attempts for a message are exhausted the processor cancels the attempt. These failed messages will continue through the pipeline unchanged, but can be dropped or placed in a dead letter queue according to your config, you can read about these patterns here.

Examples​

This example uses a branch processor to strip the request message into an empty body, grab an HTTP payload, and place the result back into the original message at the path repo.status:

pipeline:
  processors:
    - branch:
        request_map: 'root = ""'
        processors:
          - http:
              url: https://hub.docker.com/v2/repositories/warpstreamlabs/bento
              verb: GET
              headers:
                Content-Type: application/json
        result_map: 'root.repo.status = this'

Fields​

url​

The URL to connect to. This field supports interpolation functions.

Type: string

verb​

A verb to connect with

Type: string
Default: "POST"

# Examples

verb: POST

verb: GET

verb: DELETE

headers​

A map of headers to add to the request. This field supports interpolation functions.

Type: object
Default: {}

# Examples

headers:
  Content-Type: application/octet-stream
  traceparent: ${! tracing_span().traceparent }

metadata​

Specify optional matching rules to determine which metadata keys should be added to the HTTP request as headers.

Type: object

metadata.include_prefixes​

Provide a list of explicit metadata key prefixes to match against.

Type: array
Default: []

# Examples

include_prefixes:
  - foo_
  - bar_

include_prefixes:
  - kafka_

include_prefixes:
  - content-

metadata.include_patterns​

Provide a list of explicit metadata key regular expression (re2) patterns to match against.

Type: array
Default: []

# Examples

include_patterns:
  - .*

include_patterns:
  - _timestamp_unix$

dump_request_log_level​

EXPERIMENTAL: Optionally set a level at which the request and response payload of each request made will be logged.

Type: string
Default: ""
Requires version 1.0.0 or newer
Options: TRACE, DEBUG, INFO, WARN, ERROR, FATAL, ``.

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.

Secret

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.

Secret

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: ""

oauth2​

Allows you to specify open authentication via OAuth version 2 using the client credentials token flow.

Type: object

oauth2.enabled​

Whether to use OAuth version 2 in requests.

Type: bool
Default: false

oauth2.client_key​

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

Type: string
Default: ""

oauth2.client_secret​

A secret used to establish ownership of the client key.

Secret

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: ""

oauth2.token_url​

The URL of the token provider.

Type: string
Default: ""

oauth2.scopes​

A list of optional requested permissions.

Type: array
Default: []
Requires version 1.0.0 or newer

oauth2.endpoint_params​

A list of optional endpoint parameters, values should be arrays of strings.

Type: object
Default: {}
Requires version 1.0.0 or newer

# Examples

endpoint_params:
  bar:
    - woof
  foo:
    - meow
    - quack

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.

Secret

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​

BETA: 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: {}

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 1.0.0 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.

Secret

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.

Secret

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.

Secret

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}

extract_headers​

Specify which response headers should be added to resulting messages as metadata. Header keys are lowercased before matching, so ensure that your patterns target lowercased versions of the header keys that you expect.

Type: object

extract_headers.include_prefixes​

Provide a list of explicit metadata key prefixes to match against.

Type: array
Default: []

# Examples

include_prefixes:
  - foo_
  - bar_

include_prefixes:
  - kafka_

include_prefixes:
  - content-

extract_headers.include_patterns​

Provide a list of explicit metadata key regular expression (re2) patterns to match against.

Type: array
Default: []

# Examples

include_patterns:
  - .*

include_patterns:
  - _timestamp_unix$

rate_limit​

An optional rate limit to throttle requests by.

Type: string

timeout​

A static timeout to apply to requests.

Type: string
Default: "5s"

retry_period​

The base period to wait between failed requests.

Type: string
Default: "1s"

max_retry_backoff​

The maximum period to wait between failed requests.

Type: string
Default: "300s"

retries​

The maximum number of retry attempts to make.

Type: int
Default: 3

backoff_on​

A list of status codes whereby the request should be considered to have failed and retries should be attempted, but the period between them should be increased gradually.

Type: array
Default: [429]

drop_on​

A list of status codes whereby the request should be considered to have failed but retries should not be attempted. This is useful for preventing wasted retries for requests that will never succeed. Note that with these status codes the request is dropped, but message that caused the request will not be dropped.

Type: array
Default: []

successful_on​

A list of status codes whereby the attempt should be considered successful, this is useful for dropping requests that return non-2XX codes indicating that the message has been dealt with, such as a 303 See Other or a 409 Conflict. All 2XX codes are considered successful unless they are present within backoff_on or drop_on, regardless of this field.

Type: array
Default: []

proxy_url​

An optional HTTP proxy URL.

Type: string

batch_as_multipart​

Send message batches as a single request using RFC1341.

Type: bool
Default: false

parallel​

When processing batched messages, whether to send messages of the batch in parallel, otherwise they are sent serially.

Type: bool
Default: false