LightCDP.Protocol (light_cdp v0.2.0)

Copy Markdown View Source

JSON encoding/decoding for CDP messages.

CDP uses JSON-RPC over WebSocket with three message types:

  • Command — %{id: 1, method: "Page.navigate", params: %{url: "..."}}
  • Response — %{id: 1, result: %{...}} or %{id: 1, error: %{...}}
  • Event — %{method: "Page.loadEventFired", params: %{...}}

Summary

Functions

decode(json)

Decodes a CDP JSON message into a tagged tuple.

encode(id, method, params \\ %{})

Encodes a CDP command as a JSON string.

Functions

decode(json)

Decodes a CDP JSON message into a tagged tuple.

Returns one of:

  • {:response, id, result} — successful command response
  • {:error, id, error} — failed command response
  • {:event, method, params} — unsolicited event

encode(id, method, params \\ %{})

Encodes a CDP command as a JSON string.

iex> LightCDP.Protocol.encode(1, "Page.navigate", %{url: "https://example.com"})
|> Jason.decode!()
|> Map.keys() |> Enum.sort()
["id", "method", "params"]