Chrome Remote Interface
This library provides an Elixir Client to the Chrome Debugging Protocol with a small layer of abstraction for handling and subscribing to domain events.
Note: This is a super minimal client wrapper around the Chrome Debugging Protocol.
Installation
Add :chrome_remote_interface to your mix.exs file!
def deps do
[
{:chrome_remote_interface, "~> 0.4.1"}
]
endChrome DevTools Protocol Selection
Chrome Remote Interface generated its API at compile time from the protocol definition released by the Chrome DevTools Team. For more info see: https://chromedevtools.github.io/devtools-protocol/
This can be overridden by setting CRI_PROTOCOL_VERSION environment variable
to:
- 1-2
- 1-3 * default
- tot
Example:
CRI_PROTOCOL_VERSION=1-2 mix compile
CRI_PROTOCOL_VERSION=1-3 mix compile
CRI_PROTOCOL_VERSION=tot mix compile
Usage
Note: In these examples, it assumes you're already running chrome headless with remote debugging enabled.
chrome --headless --disable-gpu --remote-debugging-port=9222Basic API
# ChromeRemoteInterface works off by creating a Session to the remote debugging port.
# By default, connects to 'localhost:9222
iex(1)> server = ChromeRemoteInterface.Session.new()
%ChromeRemoteInterface.Server{host: "localhost", port: 9222}
iex(2)> {:ok, pages} = ChromeRemoteInterface.Session.list_pages(server)
{:ok,
[%{"description" => "",
"devtoolsFrontendUrl" => "/devtools/inspector.html?ws=localhost:9222/devtools/page/d4357ff1-47e8-4e53-8289-fc54089da33e",
"id" => "d4357ff1-47e8-4e53-8289-fc54089da33e", "title" => "Google",
"type" => "page", "url" => "https://www.google.com/?gws_rd=ssl",
"webSocketDebuggerUrl" => "ws://localhost:9222/devtools/page/d4357ff1-47e8-4e53-8289-fc54089da33e"}]}
# Now that we have a list of pages, we can connect to any page by using their 'webSocketDebuggerUrl'
iex(3)> first_page = pages |> List.first()
iex(4)> {:ok, page_pid} = ChromeRemoteInterface.PageSession.start_link(first_page)
# Any methods from https://chromedevtools.github.io/devtools-protocol/1-2/ should be available
# to execute on that Page.
# 'Page.navigate'
iex(5)> ChromeRemoteInterface.RPC.Page.navigate(page_pid, %{url: "https://google.com"})
%{"id" => 1, "result" => %{"frameId" => "95446.1"}}
# 'Page.printToPDF'
iex(6)> ChromeRemoteInterface.RPC.Page.printToPDF(page_pid, %{})
{:ok, %{"id" => 2, "result" => %{"data" => "JVBERi0xLj..."}}}