Claudio Ortolina
65 lines
1.8 KiB
Elixir
65 lines
1.8 KiB
Elixir
defmodule OpenAI do
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def gpt(prompt) do
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{:ok, collector} = Agent.start_link(fn -> "" end)
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gpt_stream(prompt, fn data ->
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case get_in(data, ["choices", Access.at(0), "delta", "content"]) do
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nil -> :ok
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data -> Agent.update(collector, fn current -> current <> data end)
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end
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end)
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result = Agent.get(collector, & &1) |> Jason.decode!()
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Agent.stop(collector)
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{:ok, result}
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end
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defp gpt_stream(prompt, cb) do
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fun = fn request, finch_request, finch_name, finch_options ->
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fun = fn
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{:status, status}, response ->
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%{response | status: status}
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{:headers, headers}, response ->
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%{response | headers: headers}
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{:data, data}, response ->
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body =
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data
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|> String.split("data: ")
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|> Enum.map(fn str ->
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str
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|> String.trim()
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|> decode_body(cb)
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end)
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|> Enum.filter(fn d -> d != :ok end)
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old_body = if response.body == "", do: [], else: response.body
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%{response | body: old_body ++ body}
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end
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case Finch.stream(finch_request, finch_name, Req.Response.new(), fun, finch_options) do
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{:ok, response} -> {request, response}
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{:error, exception} -> {request, exception}
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end
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end
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Req.post!("https://api.openai.com/v1/chat/completions",
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json: %{
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model: "gpt-4o-mini",
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messages: [%{role: "user", content: prompt}],
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response_format: %{type: "json_object"},
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stream: true,
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temperature: 0.2
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},
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auth: {:bearer, System.fetch_env!("OPENAI_KEY")},
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finch_request: fun
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)
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end
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defp decode_body("", _), do: :ok
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defp decode_body("[DONE]", _), do: :ok
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defp decode_body(json, cb), do: cb.(Jason.decode!(json))
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end
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