1.9 KiB
encoder Module
| Since | Origin / Contributor | Maintainer | Source |
|---|---|---|---|
| 2016-02-26 | Terry Ellison | Terry Ellison | encoder.c |
The encoder modules provides various functions for encoding and decoding byte data.
encoder.toBase64()
Provides a Base64 representation of a (binary) Lua string.
Syntax
b64 = encoder.toBase64(binary)
Parameters
binary input string to Base64 encode
Returns
A Base64 encoded string.
Example
print(encoder.toBase64(crypto.hash("sha1","abc")))
encoder.fromBase64()
Decodes a Base64 representation of a (binary) Lua string back into the original string. An error is thrown if the string is not a valid base64 encoding.
Syntax
binary_string = encoder.fromBase64(b64)
Parameters
b64 Base64 encoded input string
Returns
The decoded Lua (binary) string.
Example
print(encoder.fromBase64(encoder.toBase64("hello world")))
encoder.toHex()
Provides an ASCII hex representation of a (binary) Lua string. Each byte in the input string is represented as two hex characters in the output.
Syntax
hexstr = encoder.toHex(binary)
Parameters
binary input string to get hex representation for
Returns
An ASCII hex string.
Example
print(encoder.toHex(crypto.hash("sha1","abc")))
encoder.fromHex()
Returns the Lua binary string decode of a ASCII hex string. Each byte in the output string is represented as two hex characters in the input. An error is thrown if the string is not a valid base64 encoding.
Syntax
binary = encoder.fromHex(hexstr)
Parameters
hexstr An ASCII hex string.
Returns
Decoded string of hex representation.
Example
print(encoder.fromHex("6a6a6a"))