index.js•1.58 kB
'use strict';
const { parseContentType } = require('./utils.js');
function getInstance(cfg) {
const headers = cfg.headers;
const conType = parseContentType(headers['content-type']);
if (!conType)
throw new Error('Malformed content type');
for (const type of TYPES) {
const matched = type.detect(conType);
if (!matched)
continue;
const instanceCfg = {
limits: cfg.limits,
headers,
conType,
highWaterMark: undefined,
fileHwm: undefined,
defCharset: undefined,
defParamCharset: undefined,
preservePath: false,
};
if (cfg.highWaterMark)
instanceCfg.highWaterMark = cfg.highWaterMark;
if (cfg.fileHwm)
instanceCfg.fileHwm = cfg.fileHwm;
instanceCfg.defCharset = cfg.defCharset;
instanceCfg.defParamCharset = cfg.defParamCharset;
instanceCfg.preservePath = cfg.preservePath;
return new type(instanceCfg);
}
throw new Error(`Unsupported content type: ${headers['content-type']}`);
}
// Note: types are explicitly listed here for easier bundling
// See: https://github.com/mscdex/busboy/issues/121
const TYPES = [
require('./types/multipart'),
require('./types/urlencoded'),
].filter(function(typemod) { return typeof typemod.detect === 'function'; });
module.exports = (cfg) => {
if (typeof cfg !== 'object' || cfg === null)
cfg = {};
if (typeof cfg.headers !== 'object'
|| cfg.headers === null
|| typeof cfg.headers['content-type'] !== 'string') {
throw new Error('Missing Content-Type');
}
return getInstance(cfg);
};