import { buildPrompt } from "$lib/buildPrompt"; import type { TextGenerationStreamOutput } from "@huggingface/inference"; import type { Endpoint } from "../endpoints"; import { z } from "zod"; export const endpointOllamaParametersSchema = z.object({ weight: z.number().int().positive().default(1), model: z.any(), type: z.literal("ollama"), url: z.string().url().default("http://127.0.0.1:11434"), ollamaName: z.string().min(1).optional(), }); export function endpointOllama(input: z.input): Endpoint { const { url, model, ollamaName } = endpointOllamaParametersSchema.parse(input); return async ({ messages, preprompt, continueMessage }) => { const prompt = await buildPrompt({ messages, continueMessage, preprompt, model, }); const r = await fetch(`${url}/api/generate`, { method: "POST", headers: { "Content-Type": "application/json", }, body: JSON.stringify({ prompt, model: ollamaName ?? model.name, raw: true, options: { top_p: model.parameters.top_p, top_k: model.parameters.top_k, temperature: model.parameters.temperature, repeat_penalty: model.parameters.repetition_penalty, stop: model.parameters.stop, num_predict: model.parameters.max_new_tokens, }, }), }); if (!r.ok) { throw new Error(`Failed to generate text: ${await r.text()}`); } const encoder = new TextDecoderStream(); const reader = r.body?.pipeThrough(encoder).getReader(); return (async function* () { let generatedText = ""; let tokenId = 0; let stop = false; while (!stop) { // read the stream and log the outputs to console const out = (await reader?.read()) ?? { done: false, value: undefined }; // we read, if it's done we cancel if (out.done) { reader?.cancel(); return; } if (!out.value) { return; } let data = null; try { data = JSON.parse(out.value); } catch (e) { return; } if (!data.done) { generatedText += data.response; yield { token: { id: tokenId++, text: data.response ?? "", logprob: 0, special: false, }, generated_text: null, details: null, } satisfies TextGenerationStreamOutput; } else { stop = true; yield { token: { id: tokenId++, text: data.response ?? "", logprob: 0, special: true, }, generated_text: generatedText, details: null, } satisfies TextGenerationStreamOutput; } } })(); }; } export default endpointOllama;