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- "use strict";
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.default = isMimeType;
- var _assertString = _interopRequireDefault(require("./util/assertString"));
- function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
- /*
- Checks if the provided string matches to a correct Media type format (MIME type)
- This function only checks is the string format follows the
- etablished rules by the according RFC specifications.
- This function supports 'charset' in textual media types
- (https://tools.ietf.org/html/rfc6657).
- This function does not check against all the media types listed
- by the IANA (https://www.iana.org/assignments/media-types/media-types.xhtml)
- because of lightness purposes : it would require to include
- all these MIME types in this librairy, which would weigh it
- significantly. This kind of effort maybe is not worth for the use that
- this function has in this entire librairy.
- More informations in the RFC specifications :
- - https://tools.ietf.org/html/rfc2045
- - https://tools.ietf.org/html/rfc2046
- - https://tools.ietf.org/html/rfc7231#section-3.1.1.1
- - https://tools.ietf.org/html/rfc7231#section-3.1.1.5
- */
- // Match simple MIME types
- // NB :
- // Subtype length must not exceed 100 characters.
- // This rule does not comply to the RFC specs (what is the max length ?).
- var mimeTypeSimple = /^(application|audio|font|image|message|model|multipart|text|video)\/[a-zA-Z0-9\.\-\+]{1,100}$/i; // eslint-disable-line max-len
- // Handle "charset" in "text/*"
- 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
- // Handle "boundary" in "multipart/*"
- 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
- function isMimeType(str) {
- (0, _assertString.default)(str);
- return mimeTypeSimple.test(str) || mimeTypeText.test(str) || mimeTypeMultipart.test(str);
- }
- module.exports = exports.default;
- module.exports.default = exports.default;
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