四好公路
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/**
* Module dependencies.
*/
var raw = require('raw-body');
var inflate = require('inflation');
var qs = require('qs');
/**
* Return a Promise which parses x-www-form-urlencoded requests.
*
* Pass a node request or an object with `.req`,
* such as a koa Context.
*
* @param {Request} req
* @param {Options} [opts]
* @return {Function}
* @api public
*/
module.exports = function(req, opts){
req = req.req || req;
opts = opts || {};
// defaults
var len = req.headers['content-length'];
var encoding = req.headers['content-encoding'] || 'identity';
if (len && encoding === 'identity') opts.length = ~~len;
opts.encoding = opts.encoding || 'utf8';
opts.limit = opts.limit || '56kb';
opts.qs = opts.qs || qs;
// raw-body returns a Promise when no callback is specified
return raw(inflate(req), opts)
.then(function(str){
try {
return opts.qs.parse(str, opts.queryString);
} catch (err) {
err.status = 400;
err.body = str;
throw err;
}
});
};