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author | Florian Dold <florian.dold@gmail.com> | 2017-05-28 00:38:50 +0200 |
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committer | Florian Dold <florian.dold@gmail.com> | 2017-05-28 00:40:43 +0200 |
commit | 7fff4499fd915bcea3fa93b1aa8b35f4fe7a6027 (patch) | |
tree | 6de9a1aebd150a23b7f8c273ec657a5d0a18fe3e /node_modules/uid2/index.js | |
parent | 963b7a41feb29cc4be090a2446bdfe0c1f1bcd81 (diff) |
add linting (and some initial fixes)
Diffstat (limited to 'node_modules/uid2/index.js')
-rw-r--r-- | node_modules/uid2/index.js | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/node_modules/uid2/index.js b/node_modules/uid2/index.js new file mode 100644 index 000000000..6240b3083 --- /dev/null +++ b/node_modules/uid2/index.js @@ -0,0 +1,55 @@ +/** + * Module dependencies + */ + +var crypto = require('crypto'); + +/** + * 62 characters in the ascii range that can be used in URLs without special + * encoding. + */ +var UIDCHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; + +/** + * Make a Buffer into a string ready for use in URLs + * + * @param {String} + * @returns {String} + * @api private + */ +function tostr(bytes) { + var chars, r, i; + + r = []; + for (i = 0; i < bytes.length; i++) { + r.push(UIDCHARS[bytes[i] % UIDCHARS.length]); + } + + return r.join(''); +} + +/** + * Generate an Unique Id + * + * @param {Number} length The number of chars of the uid + * @param {Number} cb (optional) Callback for async uid generation + * @api public + */ + +function uid(length, cb) { + + if (typeof cb === 'undefined') { + return tostr(crypto.pseudoRandomBytes(length)); + } else { + crypto.pseudoRandomBytes(length, function(err, bytes) { + if (err) return cb(err); + cb(null, tostr(bytes)); + }) + } +} + +/** + * Exports + */ + +module.exports = uid; |