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create verifyBody middleware factory to abstract request validation

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This commit is contained in:
Jack Foltz 2018-07-28 16:49:54 -04:00
parent 9227fa428d
commit 740c153093
Signed by: foltik
GPG Key ID: 303F88F996E95541
1 changed files with 23 additions and 0 deletions
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app/util/verifyBody.js Normal file
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// Verifies the 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 (expected.type && typeof prop !== expected.type)
return res.status(400).json({message: expected.name + ' malformed.'});
if (expected.instance && !(prop instanceof expected.instance))
return res.status(400).json({message: expected.name + ' malformed.'});
}
next();
};
module.exports = verifyBody;