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

  • Advanced

# Common configuration fields, showing default values
label: ""
http:
  url: "" # No default (required)
  verb: POST
  headers: {}
  rate_limit: "" # No default (optional)
  timeout: 5s
  parallel: false
# All configuration fields, showing default values
label: ""
http:
  url: "" # No default (required)
  verb: POST
  headers: {}
  metadata:
    include_prefixes: []
    include_patterns: []
  dump_request_log_level: ""
  oauth:
    enabled: false
    consumer_key: ""
    consumer_secret: ""
    access_token: ""
    access_token_secret: ""
  oauth2:
    enabled: false
    client_key: ""
    client_secret: ""
    token_url: ""
    scopes: []
    endpoint_params: {}
  basic_auth:
    enabled: false
    username: ""
    password: ""
  jwt:
    enabled: false
    private_key_file: ""
    signing_method: ""
    claims: {}
    headers: {}
  tls:
    enabled: false
    skip_cert_verify: false
    enable_renegotiation: false
    root_cas: ""
    root_cas_file: ""
    client_certs: []
  extract_headers:
    include_prefixes: []
    include_patterns: []
  rate_limit: "" # No default (optional)
  timeout: 5s
  retry_period: 1s
  max_retry_backoff: 300s
  retries: 3
  follow_redirects: true
  backoff_on:
    - 429
  drop_on: []
  successful_on: []
  proxy_url: "" # No default (optional)
  batch_as_multipart: false
  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

HTTP response codes in the 200-299 range indicate a successful response. You can use the successful_on field to add more success status codes.

HTTP status codes in the 300-399 range are redirects. The follow_redirects field determines how these responses are handled.

If a request returns a response code that matches an entry in:

Add 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.

Examples

  • Branched Request

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/jeffail/benthos
              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 4.12.0 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.

This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Secrets.

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 configuration directly. For more information, see Secrets.

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.

This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Secrets.

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 3.45.0 or newer

oauth2.endpoint_params

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

Type: object

Default: {}

Requires version 4.21.0 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.

This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Secrets.

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 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 configuration directly. For more information, see Secrets.

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 configuration directly. For more information, see Secrets.

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.

Because the obsolete pbeWithMD5AndDES-CBC algorithm 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 configuration directly. For more information, see Secrets.

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

follow_redirects

Whether to follow redirects, including all responses with HTTP status codes in the 300-399 range. If set to false, the response message includes only the body, status, and headers from the redirect response, and this processor does not make a request to the URL specified in the Location header.

Type: bool

Default: true

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