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34 lines
1.1 KiB
34 lines
1.1 KiB
const ACCEPTABLE_CONTENT_TYPE = /^(multipart\/.+);(.*)$/i;
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const UNACCEPTABLE_METHODS = ['GET', 'HEAD'];
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/**
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* Ensures the request contains a content body
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* @param {Object} req Express req object
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* @returns {Boolean}
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*/
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const hasBody = (req) => {
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return ('transfer-encoding' in req.headers) ||
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('content-length' in req.headers && req.headers['content-length'] !== '0');
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};
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/**
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* Ensures the request is not using a non-compliant multipart method
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* such as GET or HEAD
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* @param {Object} req Express req object
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* @returns {Boolean}
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*/
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const hasAcceptableMethod = req => !UNACCEPTABLE_METHODS.includes(req.method);
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/**
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* Ensures that only multipart requests are processed by express-fileupload
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* @param {Object} req Express req object
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* @returns {Boolean}
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*/
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const hasAcceptableContentType = req => ACCEPTABLE_CONTENT_TYPE.test(req.headers['content-type']);
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/**
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* Ensures that the request in question is eligible for file uploads
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* @param {Object} req Express req object
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* @returns {Boolean}
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*/
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module.exports = req => hasBody(req) && hasAcceptableMethod(req) && hasAcceptableContentType(req);
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