1 | ;
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.default = isMimeType;
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7 |
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8 | var _assertString = _interopRequireDefault(require("./util/assertString"));
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9 |
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10 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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11 |
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12 | /*
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13 | Checks if the provided string matches to a correct Media type format (MIME type)
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14 |
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15 | This function only checks is the string format follows the
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16 | etablished rules by the according RFC specifications.
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17 | This function supports 'charset' in textual media types
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18 | (https://tools.ietf.org/html/rfc6657).
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19 |
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20 | This function does not check against all the media types listed
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21 | by the IANA (https://www.iana.org/assignments/media-types/media-types.xhtml)
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22 | because of lightness purposes : it would require to include
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23 | all these MIME types in this librairy, which would weigh it
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24 | significantly. This kind of effort maybe is not worth for the use that
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25 | this function has in this entire librairy.
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26 |
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27 | More informations in the RFC specifications :
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28 | - https://tools.ietf.org/html/rfc2045
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29 | - https://tools.ietf.org/html/rfc2046
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30 | - https://tools.ietf.org/html/rfc7231#section-3.1.1.1
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31 | - https://tools.ietf.org/html/rfc7231#section-3.1.1.5
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32 | */
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33 | // Match simple MIME types
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34 | // NB :
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35 | // Subtype length must not exceed 100 characters.
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36 | // This rule does not comply to the RFC specs (what is the max length ?).
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37 | var mimeTypeSimple = /^(application|audio|font|image|message|model|multipart|text|video)\/[a-zA-Z0-9\.\-\+]{1,100}$/i; // eslint-disable-line max-len
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38 | // Handle "charset" in "text/*"
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39 |
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40 | var mimeTypeText = /^text\/[a-zA-Z0-9\.\-\+]{1,100};\s?charset=("[a-zA-Z0-9\.\-\+\s]{0,70}"|[a-zA-Z0-9\.\-\+]{0,70})(\s?\([a-zA-Z0-9\.\-\+\s]{1,20}\))?$/i; // eslint-disable-line max-len
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41 | // Handle "boundary" in "multipart/*"
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42 |
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43 | var mimeTypeMultipart = /^multipart\/[a-zA-Z0-9\.\-\+]{1,100}(;\s?(boundary|charset)=("[a-zA-Z0-9\.\-\+\s]{0,70}"|[a-zA-Z0-9\.\-\+]{0,70})(\s?\([a-zA-Z0-9\.\-\+\s]{1,20}\))?){0,2}$/i; // eslint-disable-line max-len
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44 |
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45 | function isMimeType(str) {
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46 | (0, _assertString.default)(str);
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47 | return mimeTypeSimple.test(str) || mimeTypeText.test(str) || mimeTypeMultipart.test(str);
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48 | }
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49 |
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50 | module.exports = exports.default; |
\ | No newline at end of file |