Title here
Summary here
Base64 Encoding in GDScript
Our first example demonstrates base64 encoding and decoding. GDScript doesn’t have a built-in base64 module, so we’ll use a custom implementation.
extends Node
# This is a simple base64 implementation for GDScript
# It's not as efficient as built-in methods in other languages,
# but it serves the purpose for this example
const BASE64_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
func _ready():
# Here's the string we'll encode/decode
var data = "abc123!?$*&()'-=@~"
# Encode using the standard base64 encoder
var s_enc = base64_encode(data)
print(s_enc)
# Decoding
var s_dec = base64_decode(s_enc)
print(s_dec)
print()
# This encodes/decodes using a URL-compatible base64 format
var u_enc = base64_url_encode(data)
print(u_enc)
var u_dec = base64_url_decode(u_enc)
print(u_dec)
func base64_encode(input: String) -> String:
var output = ""
var i = 0
while i < input.length():
var n = (ord(input[i]) << 16) if i + 0 < input.length() else 0
n += (ord(input[i + 1]) << 8) if i + 1 < input.length() else 0
n += ord(input[i + 2]) if i + 2 < input.length() else 0
output += BASE64_CHARS[(n >> 18) & 63]
output += BASE64_CHARS[(n >> 12) & 63]
output += BASE64_CHARS[(n >> 6) & 63] if i + 1 < input.length() else "="
output += BASE64_CHARS[n & 63] if i + 2 < input.length() else "="
i += 3
return output
func base64_decode(input: String) -> String:
var output = ""
var i = 0
while i < input.length():
var n = (BASE64_CHARS.find(input[i]) << 18) if i + 0 < input.length() else 0
n += (BASE64_CHARS.find(input[i + 1]) << 12) if i + 1 < input.length() else 0
n += (BASE64_CHARS.find(input[i + 2]) << 6) if i + 2 < input.length() else 0
n += BASE64_CHARS.find(input[i + 3]) if i + 3 < input.length() else 0
output += char((n >> 16) & 255)
if input[i + 2] != "=":
output += char((n >> 8) & 255)
if input[i + 3] != "=":
output += char(n & 255)
i += 4
return output
func base64_url_encode(input: String) -> String:
return base64_encode(input).replace("+", "-").replace("/", "_").replace("=", "")
func base64_url_decode(input: String) -> String:
var padded = input.replace("-", "+").replace("_", "/")
while padded.length() % 4 != 0:
padded += "="
return base64_decode(padded)This script defines functions for both standard and URL-compatible base64 encoding and decoding. Here’s what each part does:
We define a constant
BASE64_CHARScontaining the characters used in base64 encoding.In the
_ready()function, we demonstrate the usage of our base64 functions:- We encode and then decode a string using standard base64.
- We do the same using URL-compatible base64.
The
base64_encode()function takes a string input and returns its base64 encoded form.The
base64_decode()function takes a base64 encoded string and returns the original string.The
base64_url_encode()function is similar tobase64_encode(), but replaces characters to make the output URL-safe.The
base64_url_decode()function reverses the URL-safe encoding.
To run this script, you would need to attach it to a Node in your Godot scene. The output would be printed to the Godot console.
Note that this implementation is not as efficient as built-in methods in other languages, but it demonstrates the concept of base64 encoding and decoding in GDScript.