SillyTavern/public/scripts/extensions/shared.js

72 lines
2.8 KiB
JavaScript

import { getRequestHeaders } from '../../script.js';
import { extension_settings } from '../extensions.js';
import { oai_settings } from '../openai.js';
import { SECRET_KEYS, secret_state } from '../secrets.js';
import { createThumbnail, isValidUrl } from '../utils.js';
/**
* Generates a caption for an image using a multimodal model.
* @param {string} base64Img Base64 encoded image
* @param {string} prompt Prompt to use for captioning
* @returns {Promise<string>} Generated caption
*/
export async function getMultimodalCaption(base64Img, prompt) {
if (extension_settings.caption.multimodal_api === 'openai' && !secret_state[SECRET_KEYS.OPENAI]) {
throw new Error('OpenAI API key is not set.');
}
if (extension_settings.caption.multimodal_api === 'openrouter' && !secret_state[SECRET_KEYS.OPENROUTER]) {
throw new Error('OpenRouter API key is not set.');
}
if (extension_settings.caption.multimodal_api === 'google' && !secret_state[SECRET_KEYS.MAKERSUITE]) {
throw new Error('MakerSuite API key is not set.');
}
// OpenRouter has a payload limit of ~2MB. Google is 4MB, but we love democracy.
const isGoogle = extension_settings.caption.multimodal_api === 'google';
const base64Bytes = base64Img.length * 0.75;
const compressionLimit = 2 * 1024 * 1024;
if (['google', 'openrouter'].includes(extension_settings.caption.multimodal_api) && base64Bytes > compressionLimit) {
const maxSide = 1024;
base64Img = await createThumbnail(base64Img, maxSide, maxSide, 'image/jpeg');
if (isGoogle) {
base64Img = base64Img.split(',')[1];
}
}
const useReverseProxy =
extension_settings.caption.multimodal_api === 'openai'
&& extension_settings.caption.allow_reverse_proxy
&& oai_settings.reverse_proxy
&& isValidUrl(oai_settings.reverse_proxy);
const proxyUrl = useReverseProxy ? oai_settings.reverse_proxy : '';
const proxyPassword = useReverseProxy ? oai_settings.proxy_password : '';
const apiResult = await fetch(`/api/${isGoogle ? 'google' : 'openai'}/caption-image`, {
method: 'POST',
headers: getRequestHeaders(),
body: JSON.stringify({
image: base64Img,
prompt: prompt,
...(isGoogle
? {}
: {
api: extension_settings.caption.multimodal_api || 'openai',
model: extension_settings.caption.multimodal_model || 'gpt-4-vision-preview',
reverse_proxy: proxyUrl,
proxy_password: proxyPassword,
}),
}),
});
if (!apiResult.ok) {
throw new Error('Failed to caption image via OpenAI.');
}
const { caption } = await apiResult.json();
return caption;
}