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import { HF_ACCESS_TOKEN, HF_TOKEN } from "$env/static/private";
import { buildPrompt } from "$lib/buildPrompt";
import { textGenerationStream } from "@huggingface/inference";
import type { Endpoint } from "../endpoints";
import { z } from "zod";
export const endpointTgiParametersSchema = z.object({
weight: z.number().int().positive().default(1),
model: z.any(),
type: z.literal("tgi"),
url: z.string().url(),
accessToken: z.string().default(HF_TOKEN ?? HF_ACCESS_TOKEN),
authorization: z.string().optional(),
});
export function endpointTgi(input: z.input<typeof endpointTgiParametersSchema>): Endpoint {
const { url, accessToken, model, authorization } = endpointTgiParametersSchema.parse(input);
return async ({ conversation }) => {
const prompt = await buildPrompt({
messages: conversation.messages,
webSearch: conversation.messages[conversation.messages.length - 1].webSearch,
preprompt: conversation.preprompt,
model,
id: conversation._id,
});
return textGenerationStream(
{
parameters: { ...model.parameters, return_full_text: false },
model: url,
inputs: prompt,
accessToken,
},
{
use_cache: false,
fetch: async (endpointUrl, info) => {
if (info && authorization && !accessToken) {
// Set authorization header if it is defined and HF_TOKEN is empty
info.headers = {
...info.headers,
Authorization: authorization,
};
}
return fetch(endpointUrl, info);
},
}
);
};
}
export default endpointTgi;
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