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Code Issues Releases Wiki Activity

Promisalate body verification code

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This commit is contained in:
Jack Foltz 2018-08-01 13:07:52 -04:00
parent 21fe0de46d
commit dbc37490fb
Signed by: foltik
GPG Key ID: 303F88F996E95541
1 changed files with 28 additions and 24 deletions
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52
app/util/verifyBody.js
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@ -1,32 +1,36 @@
// Verifies a single property is well formed
const verifyProp = (req, expected) => new Promise((resolve, reject) => {
const prop = req.body[expected.name];
// Verifies the request body is well formed
if (!expected.optional && !prop)
return reject({code: 400, message: expected.name + ' not specified.'});
if (prop && expected.type && typeof prop !== expected.type)
return reject({code: 400, message: expected.name + ' malformed.'});
if (prop && expected.instance && !(prop instanceof expected.instance))
return reject({code: 400, message: expected.name + ' malformed.'});
if (prop && expected.maxLength && prop.length > expected.maxLength)
return reject({code: 422, message: expected.name + ' too long.'});
if (prop && expected.sanitize && req.sanitize(prop) !== prop)
return reject({code: 422, message: expected.name + ' contains invalid characters.'});
if (prop && expected.restrict && prop.replace(expected.restrict, '') !== prop)
return reject({code: 422, message: expected.name + ' contains invalid characters.'});
resolve();
});
// Verifies the entire request body is well formed
// expectedProps follows the format:
// [{name: 'myList', instance: 'Array'}, {name: 'myVar', type: 'string', optional: true}, etc.]
const verifyBody = expectedProps =>
(req, res, next) => {
for (let i = 0; i < expectedProps.length; i++) {
const expected = expectedProps[i];
const prop = req.body[expected.name];
if (!expected.optional && !prop)
return res.status(400).json({message: expected.name + ' not specified.'});
if (prop && expected.type && typeof prop !== expected.type)
return res.status(400).json({message: expected.name + ' malformed.'});
if (prop && expected.instance && !(prop instanceof expected.instance))
return res.status(400).json({message: expected.name + ' malformed.'});
if (prop && expected.maxLength && prop.length > expected.maxLength)
return res.status(422).json({message: expected.name + ' too long.'});
if (prop && expected.sanitize && req.sanitize(prop) !== prop)
return res.status(422).json({message: expected.name + ' contains invalid characters.'});
if (prop && expected.restrict && prop.replace(expected.restrict, '') !== prop)
return res.status(422).json({message: expected.name + ' contains invalid characters.'});
}
next();
Promise.all(expectedProps.map(expected => verifyProp(req, expected)))
.then(() => next())
.catch(err => res.status(err.code).json({message: err.message}));
};
module.exports = verifyBody;