94 lines
2.6 KiB
Ruby
94 lines
2.6 KiB
Ruby
# frozen_string_literal: true
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module DiscourseAi
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module Completions
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module Endpoints
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class Vllm < Base
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class << self
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def can_contact?(endpoint_name)
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endpoint_name == "vllm"
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end
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def dependant_setting_names
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%w[ai_vllm_endpoint_srv ai_vllm_endpoint]
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end
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def correctly_configured?(_model_name)
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SiteSetting.ai_vllm_endpoint_srv.present? || SiteSetting.ai_vllm_endpoint.present?
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end
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def endpoint_name(model_name)
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"vLLM - #{model_name}"
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end
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end
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def normalize_model_params(model_params)
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model_params = model_params.dup
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# max_tokens, temperature are already supported
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if model_params[:stop_sequences]
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model_params[:stop] = model_params.delete(:stop_sequences)
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end
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model_params
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end
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def default_options
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{ max_tokens: 2000, model: model }
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end
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def provider_id
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AiApiAuditLog::Provider::Vllm
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end
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private
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def model_uri
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service = DiscourseAi::Utils::DnsSrv.lookup(SiteSetting.ai_vllm_endpoint_srv)
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if service.present?
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api_endpoint = "https://#{service.target}:#{service.port}/v1/chat/completions"
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else
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api_endpoint = "#{SiteSetting.ai_vllm_endpoint}/v1/chat/completions"
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end
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@uri ||= URI(api_endpoint)
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end
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def prepare_payload(prompt, model_params, _dialect)
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default_options
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.merge(model_params)
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.merge(messages: prompt)
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.tap { |payload| payload[:stream] = true if @streaming_mode }
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end
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def prepare_request(payload)
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headers = { "Referer" => Discourse.base_url, "Content-Type" => "application/json" }
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headers["X-API-KEY"] = SiteSetting.ai_vllm_api_key if SiteSetting.ai_vllm_api_key.present?
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Net::HTTP::Post.new(model_uri, headers).tap { |r| r.body = payload }
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end
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def partials_from(decoded_chunk)
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decoded_chunk
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.split("\n")
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.map do |line|
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data = line.split("data: ", 2)[1]
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data == "[DONE]" ? nil : data
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end
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.compact
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end
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def extract_completion_from(response_raw)
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parsed = JSON.parse(response_raw, symbolize_names: true).dig(:choices, 0)
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# half a line sent here
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return if !parsed
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response_h = @streaming_mode ? parsed.dig(:delta) : parsed.dig(:message)
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response_h.dig(:content)
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end
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end
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end
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end
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end
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