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fix: unable to remotely connect to chrome #334

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fix: unable to remotely connect to chrome #334

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8 changes: 7 additions & 1 deletion lib/chromic_pdf/pdf/connection/inet.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -58,14 +58,20 @@ if Code.ensure_loaded?(WebSockex) do
:inets.start()

url = String.to_charlist("http://#{host}:#{port}/json/version")
headers = [{~c"accept", ~c"application/json"}]
# Chrome requires the "host" header to be set to either an ip address or localhost,
# otherwise it will not accept the connection
headers = [{~c"accept", ~c"application/json"}, {~c"host", ~c"localhost"}]
http_request_opts = [ssl: [verify: :verify_none]]

case :httpc.request(:get, {url, headers}, http_request_opts, []) do
{:ok, {_, _, body}} ->
body
|> Jason.decode!()
|> Map.fetch!("webSocketDebuggerUrl")
# replace the "localhost" we've provided using the "host" header with
# the actual address of the chrome instance
|> String.replace("localhost", "#{host}:#{port}")


{:error, {:failed_connect, _}} ->
raise ConnectionLostError, "failed to connect to #{url}"
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