fantus/pages/api/form.tsx

import { createReadStream, statSync, unlinkSync, writeFileSync } from 'fs'
import { tmpdir } from 'os'

import { NextApiRequest, NextApiResponse } from 'next'
import getConfig from 'next/config'
import Formidable from 'formidable'
import axios from 'axios'

const { RECAPTCHA_SERVER, NEXTCLOUD_TOKEN } = getConfig().serverRuntimeConfig

const sendFileAndDelete = async (name: string, path: string) => {
    const stat = statSync(path)
    const stream = createReadStream(path)

    await axios({
        url: 'https://cloud.nicco.io/public.php/webdav/' + name,
        method: 'put',
        auth: {
            username: NEXTCLOUD_TOKEN,
            password: '',
        },
        headers: {
            'Content-Length': stat.size
        },
        data: stream
    })

    unlinkSync(path)
}

export default async (req: NextApiRequest, res: NextApiResponse) => {
    try {

        // @ts-ignore
        const form = new Formidable();

        form.maxFileSize = 300 * 1024 * 1024 // 300MiB

        const body = await new Promise<any>((resolve, reject) => {
            form.parse(req, (err: any, fields: any, files: any) => {
                if (err) reject()
                else resolve({
                    fields: JSON.parse(fields.json),
                    files: Object.values(files)
                })
            });
        })



        const { token, ...rest } = body.fields

        const { data } = await axios({
            url: 'https://www.google.com/recaptcha/api/siteverify',
            method: 'post',
            params: {
                secret: RECAPTCHA_SERVER,
                response: token,
            },
        })

        if (!data.success) throw new Error()

        const now = Date.now()
        for (const file of body.files)
            sendFileAndDelete(`${now}_${file.name}`, file.path)

        const txtFile = `${tmpdir()}/text`
        writeFileSync(txtFile, `${rest.contact}\n${rest.description}`)
        sendFileAndDelete(`${now}_details.txt`, txtFile)

        res.status(200).end()

    } catch {
        res.status(400).end()
    }
}

export const config = {
    api: {
        bodyParser: false,
    },
}