SkillKit.Webhook.BodyReader (SkillKit v0.1.0)

Plug.Parsers body-reader callback that stashes the raw request body in conn.assigns.raw_body before handing it off to the parser.

Signature verification (HMAC over the raw bytes) can't run against a parsed body — by the time Plug.Parsers decodes the JSON, the exact byte sequence is gone. This reader captures the bytes first.

Wire it up in the host app's Plug pipeline:

plug Plug.Parsers,
  parsers: [:json, :urlencoded],
  body_reader: {SkillKit.Webhook.BodyReader, :read_body, []},
  json_decoder: Jason

Summary

Functions

read_body(conn, opts)

Reads the request body and appends the chunk to conn.assigns.raw_body.

Functions

read_body(conn, opts)

@spec read_body(Plug.Conn.t(), Plug.opts()) ::
  {:ok, binary(), Plug.Conn.t()}
  | {:more, binary(), Plug.Conn.t()}
  | {:error, term()}

Reads the request body and appends the chunk to conn.assigns.raw_body.

Returns {:ok, body, conn} when the body has been fully read, or {:more, partial, conn} if more bytes remain — matching the Plug.Conn.read_body/2 contract that Plug.Parsers expects.