@iexec/iapp/dist/utils/prepareInputFile.js

A CLI to guide you through the process of building an iExec iApp

import { mkdir, writeFile } from 'node:fs/promises';
import { join } from 'node:path';
import { TEST_INPUT_DIR } from '../config/config.js';
// TODO we may want to cache to avoid downloading large input files over and over
/**
 * download input file in input dir and returns file name
 */
export async function prepareInputFile(url) {
    try {
        /**
         * the worker names the file after the url part after the last `/` occurrence 🤨 looks weird and leads to bugs.
         * investigating with core team to name downloaded files with uuid or other name safe collision resistant solution
         */
        const name = url.split('/').pop();
        if (name === undefined || name === '.' || name === '..') {
            throw Error('Invalid computed file name');
        }
        await fetch(url).then(async (response) => {
            await mkdir(TEST_INPUT_DIR, { recursive: true }); // ensure input dir
            if (!response.body) {
                throw Error('Cannot read response body');
            }
            await writeFile(join(TEST_INPUT_DIR, name), response.body);
        });
        return name;
    }
    catch (err) {
        throw Error(`Failed to prepare input file \`${url}\`: ${err?.message}`);
    }
}
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