98 lines
2.1 KiB
Markdown
98 lines
2.1 KiB
Markdown
Package uniuri
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=====================
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[](https://travis-ci.org/dchest/uniuri)
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```go
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import "github.com/dchest/uniuri"
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```
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Package uniuri generates random strings good for use in URIs to identify
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unique objects.
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Example usage:
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```go
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s := uniuri.New() // s is now "apHCJBl7L1OmC57n"
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```
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A standard string created by New() is 16 bytes in length and consists of
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Latin upper and lowercase letters, and numbers (from the set of 62 allowed
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characters), which means that it has ~95 bits of entropy. To get more
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entropy, you can use NewLen(UUIDLen), which returns 20-byte string, giving
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~119 bits of entropy, or any other desired length.
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Functions read from crypto/rand random source, and panic if they fail to
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read from it.
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Constants
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---------
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```go
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const (
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// StdLen is a standard length of uniuri string to achive ~95 bits of entropy.
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StdLen = 16
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// UUIDLen is a length of uniuri string to achive ~119 bits of entropy, closest
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// to what can be losslessly converted to UUIDv4 (122 bits).
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UUIDLen = 20
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)
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```
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Variables
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---------
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```go
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var StdChars = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789")
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```
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StdChars is a set of standard characters allowed in uniuri string.
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Functions
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---------
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### func New
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```go
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func New() string
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```
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New returns a new random string of the standard length, consisting of
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standard characters.
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### func NewLen
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```go
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func NewLen(length int) string
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```
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NewLen returns a new random string of the provided length, consisting of
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standard characters.
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### func NewLenChars
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```go
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func NewLenChars(length int, chars []byte) string
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```
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NewLenChars returns a new random string of the provided length, consisting
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of the provided byte slice of allowed characters (maximum 256).
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Public domain dedication
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------------------------
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Written in 2011-2014 by Dmitry Chestnykh
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The author(s) have dedicated all copyright and related and
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neighboring rights to this software to the public domain
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worldwide. Distributed without any warranty.
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http://creativecommons.org/publicdomain/zero/1.0/
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