Generate images using Draw Things HTTP API

gen_images.mjs

import { writeFile } from 'fs/promises'

const DRAW_THINGS_URL = 'http://127.0.0.1:7860/sdapi/v1/txt2img'
const BATCH_COUNT = 5
const IMG_SIZE = 512
const MAX_FILE_NAME_LEN = 30

const prompt = 'bunch of carrots'

const params = {
  prompt,
  negative_prompt: 
    '(worst quality, low quality, normal quality, (variations):1.4), blur:1.5',
  seed: -1,
  steps: 20,
  guidance_scale: 4,
  batch_count: BATCH_COUNT,
  width: IMG_SIZE,
  height: IMG_SIZE
}

const opts = {
  method: 'POST',
  mode: 'no-cors',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify(params)
}

const now = Date.now()
const getFileName = (idx) => 
  `${prompt.replace(/\s/g, '_').substring(0, MAX_FILE_NAME_LEN).toLowerCase()}_${now}_${idx}.png`

const saveImg = async (data, idx) => {
  const fileName = getFileName(idx)
  await writeFile(fileName, data, 'base64')
}

const res = await fetch(DRAW_THINGS_URL, opts)
const data = await res.json()
const images = data.images.map(saveImg)

await Promise.all(images)