@ericblade/mws-simple/lib/getContentType.js

Modern, full featured nodejs Amazon MWS API in ~150 lines of code

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = (content) => {
    if (!content)
        return 'application/x-www-form-urlencoded; charset=utf-8';
    if (content.slice(0, 5) === '<?xml')
        return 'text/xml';
    return 'text/tab-separated-values; charset=iso-8859-1';
};