http

Sends HTTP/1.1 requests and forwards the response.

http url:string, [method=string, payload=string, headers=record,
     response_field=field, metadata_field=field, paginate=record->string,
     paginate_delay=duration, parallel=int, tls=bool, certfile=string,
     keyfile=string, password=string, connection_timeout=duration,
     max_retry_count=int, retry_delay=duration { … }]

Description

The http operator issues HTTP/1.1 requests and forwards received responses as events.

url: string

URL to connect to.

method = string (optional)

One of the following HTTP method to use when using the client:

• get
• head
• post
• put
• del
• connect
• options
• trace Nice!

Defaults to get, or post if payload is specified.

payload = string (optional)

Payload to send with the HTTP request.

headers = record (optional)

Record of headers to send with the request.

response_field = field (optional)

Field to insert the response into.

Defaults to this.

metadata_field = field (optional)

Field to insert metadata into when using the parsing pipeline.

The metadata has the following schema:

Field	Type	Description
code	uint64	The HTTP status code of the response.
headers	record	The response headers.

paginate = record -> string (optional)

A lambda expression to evaluate against the result of the request (optionally parsed by the given pipeline). If the expression evaluation is successful and non-null, the resulting string is used as the URL for a new GET request with the same headers.

paginate_delay = duration (optional)

The duration to wait between consecutive paginatation requests.

Defaults to 0s.

parallel = int (optional)

Maximum amount of requests that can be in progress at any time.

Defaults to 1.

tls = bool (optional)

Enables TLS.

certfile = string (optional)

Path to the client certificate.

keyfile = string (optional)

Path to the key for the client certificate.

password = string (optional)

Password file for keyfile.

connection_timeout = duration (optional)

Timeout for the connection.

Defaults to 5s.

max_retry_count = int (optional)

The maximum times to retry a failed request. Every request has its own retry count.

Defaults to 0.

retry_delay = duration (optional)

The duration to wait between each retry.

Defaults to 1s.

{ … } (optional)

A pipeline that receives the response body as bytes, allowing parsing per request. This is especially useful in scenarios where the response body can be parsed into multiple events.

If not provided, the operator will attempt to infer the parsing operator from the Content-Type header. Should this inference fail (e.g., unsupported or missing Content-Type), the operator raises a warning and skips the request.

Examples

Make a GET request

Here we make a request to urlscan.io to search for scans for tenzir.com and get the first result.

from {}
http "https://urlscan.io/api/v1/search?q=tenzir.com"
unroll results
head 1

{
  results: {
    submitter: { ... },
    task: { ... },
    stats: { ... },
    page: { ... },
    _id: "0196edb1-521e-761f-9d62-1ca4cfad5b30",
    _score: null,
    sort: [ "1747744570133", "\"0196edb1-521e-761f-9d62-1ca4cfad5b30\"" ],
    result: "https://urlscan.io/api/v1/result/0196edb1-521e-761f-9d62-1ca4cfad5b30/",
    screenshot: "https://urlscan.io/screenshots/0196edb1-521e-761f-9d62-1ca4cfad5b30.png",
  },
  total: 9,
  took: 296,
  has_more: false,
}

Keeping input context

Frequently, the purpose of making real-time requests in a pipeline is to enrich the incoming data with additional context. In these cases, we want to keep the original event around. This can be done simply by specifying the response_field and metadata_field options as appropriate.

E.g. in the above example, let’s assume we had some initial context that we want to keep around:

from { ctx: {severity: "HIGH"}, domain: "tenzir.com", ip: 0.0.0.0 }
http "https://urlscan.io/api/v1/search?q=" + domain, response_field=scan
scan.results = scan.results[0]

{
  ctx: {
    severity: "HIGH",
  },
  domain: "tenzir.com",
  ip: 0.0.0.0,
  scan: {
    results: {
      submitter: { ... },
      task: { ... },
      stats: { ... },
      page: { ... },
      _id: "0196edb1-521e-761f-9d62-1ca4cfad5b30",
      _score: null,
      sort: [ "1747744570133", "\"0196edb1-521e-761f-9d62-1ca4cfad5b30\"" ],
      result: "https://urlscan.io/api/v1/result/0196edb1-521e-761f-9d62-1ca4cfad5b30/",
      screenshot: "https://urlscan.io/screenshots/0196edb1-521e-761f-9d62-1ca4cfad5b30.png",
    },
    total: 9,
    took: 88,
    has_more: false,
  },
}

Paginate an API

We can utilize the sort and has_more fields to get more pages from the API.

let $URL = "https://urlscan.io/api/v1/search?q=example.com"
from {}
http $URL, paginate=(x => $URL + "&search_after=" + results.last().sort.first() + "," + results.last().sort.last().slice(begin=1, end=-1) if has_more?)
head 10

Here we construct the next url for pagination by extracting values from the responses.

The query parameter search_after expects the two values from the sort key in the response to be joined with a ,. Thus forming a URL like https://urlscan.io/api/v1/search?q=example.com&search_after=1747796723608,0196f0cd-6fda-761a-81a6-ae1b18914e61.

The if has_more? ensures pagination only continues till we have a has_more field that is true.

Additionally, we limit the maximum pages by a simple head 10.

See Also

from_http