use base64::engine::general_purpose;
use base64::Engine;
use serde_json::Value;
fn base64_to_pretty_json(base64_string: &str) -> Result<String, String> {
// Decode Base64 to plain text using the STANDARD engine
match general_purpose::STANDARD.decode(base64_string) {
Ok(decoded_bytes) => {
let decoded_string = String::from_utf8(decoded_bytes)
.map_err(|_| "Invalid UTF-8 sequence".to_string())?;
// Parse plain text to JSON
match serde_json::from_str::<Value>(&decoded_string) {
Ok(json_object) => {
// Convert JSON object to pretty JSON string
let json_string =
serde_json::to_string_pretty(&json_object).map_err(|e| e.to_string())?;
Ok(json_string)
}
Err(e) => Err(format!("Error parsing JSON: {}", e)),
}
}
Err(e) => Err(format!("Error decoding Base64: {}", e)),
}
}
fn main() {
let base64_string = "ewogICJ1c2VybmFtZSI6ICJPa2FiZSIsCiAgImFnZSI6IDM3Cn0=";
match base64_to_pretty_json(base64_string) {
Ok(json_string) => println!("JSON String:\n{}", json_string),
Err(err) => eprintln!("{}", err),
}
}
/*
run:
JSON String:
{
"age": 37,
"username": "Okabe"
}
*/
