import { smallModel } from "$lib/server/models"; import { modelEndpoint } from "./modelEndpoint"; import { trimSuffix } from "$lib/utils/trimSuffix"; import { trimPrefix } from "$lib/utils/trimPrefix"; import { PUBLIC_SEP_TOKEN } from "$lib/constants/publicSepToken"; import { AwsClient } from "aws4fetch"; interface Parameters { temperature: number; truncate: number; max_new_tokens: number; stop: string[]; } export async function generateFromDefaultEndpoint( prompt: string, parameters?: Partial ): Promise { const newParameters = { ...smallModel.parameters, ...parameters, return_full_text: false, wait_for_model: true, }; const randomEndpoint = modelEndpoint(smallModel); const abortController = new AbortController(); let resp: Response; if (randomEndpoint.host === "sagemaker") { const requestParams = JSON.stringify({ parameters: newParameters, inputs: prompt, }); const aws = new AwsClient({ accessKeyId: randomEndpoint.accessKey, secretAccessKey: randomEndpoint.secretKey, sessionToken: randomEndpoint.sessionToken, service: "sagemaker", }); resp = await aws.fetch(randomEndpoint.url, { method: "POST", body: requestParams, signal: abortController.signal, headers: { "Content-Type": "application/json", }, }); } else { resp = await fetch(randomEndpoint.url, { headers: { "Content-Type": "application/json", Authorization: randomEndpoint.authorization, }, method: "POST", body: JSON.stringify({ parameters: newParameters, inputs: prompt, }), signal: abortController.signal, }); } if (!resp.ok) { throw new Error(await resp.text()); } if (!resp.body) { throw new Error("Body is empty"); } const decoder = new TextDecoder(); const reader = resp.body.getReader(); let isDone = false; let result = ""; while (!isDone) { const { done, value } = await reader.read(); isDone = done; result += decoder.decode(value, { stream: true }); // Convert current chunk to text } // Close the reader when done reader.releaseLock(); let results; if (result.startsWith("data:")) { results = [JSON.parse(result.split("data:")?.pop() ?? "")]; } else { results = JSON.parse(result); } let generated_text = trimSuffix( trimPrefix(trimPrefix(results[0].generated_text, "<|startoftext|>"), prompt), PUBLIC_SEP_TOKEN ).trimEnd(); for (const stop of [...(newParameters?.stop ?? []), "<|endoftext|>"]) { if (generated_text.endsWith(stop)) { generated_text = generated_text.slice(0, -stop.length).trimEnd(); } } return generated_text; }