har_md5sum.js

// Max Davitt - https://max.davitt.me

// Released under CC0 1.0 Universal
// https://creativecommons.org/publicdomain/zero/1.0/

const { createHash } = require('crypto');
const readFile = require('util').promisify(require('fs').readFile);

(async () => {
	if (process.argv.length < 3) {
		console.error('usage: node har_md5sum.js test.har ...');
	} else {
		console.log(
			(
				await Promise.all(
					process.argv.slice(2).map(async (path) => [path, await readFile(path, 'utf8')])
				)
			)
				.map(([path, json]) => [path, JSON.parse(json)])
				.map(([path, har]) => `# ${path}\n${
					har.log.entries
						.map((entry) => {
							const { url } = entry.request;
							const { content } = entry.response;

							const hash = createHash('md5');
							hash.update(content.text, content.encoding || 'utf8');
							return `${url}\t${hash.digest('hex')}`;
						})
						.join('\n')}`
				)
				.join('\n')
		);
	}
})().catch(console.error);