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Code4R7
Asked: 2024-11-15 23:47:27 +0800 CST

如何将短 UUID 转换回 UUID

  • 772

常规UUIDshort-uuid-rs可以缩短。例如，当我想转换 UUID 以适合 Code39 条形码时，这将起作用：

let uuid_str = "420e04de-4f06-4e3b-8718-9f6ede92ea9e";
let custom_alphabet = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ-.$/+%";
let translator = CustomTranslator::new(custom_alphabet).unwrap();
let uuid = uuid::Uuid::from_str(uuid_str).unwrap();
let short = ShortUuidCustom::from_uuid(&uuid, &translator);
println!("{}", short.to_string());  // prints "0CK3Z2YL23B7.Q1FR8N65R7X6"

但是一旦使用条形码扫描仪扫描短代码，它就需要再次编码常规 UUID。

如何将其转换回来？

我尝试过MindSwipe的解决方案：

let custom_alphabet = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ-.$/+%";
let translator = CustomTranslator::new(custom_alphabet).unwrap();
// there
let orig_uuid_str = "420e04de-4f06-4e3b-8718-9f6ede92ea9e";
let short = ShortUuidCustom::from_uuid_str(&orig_uuid_str, &translator).unwrap();
let short_uuid_str = &short.to_string();
// and back again
let short = match ShortUuidCustom::parse_str(short_uuid_str, &translator) {
  Ok(s) => s,
  Err(e) => panic!("{:?}", e),
};
let new_uuid_str = &short.to_uuid(&translator).unwrap().to_string();
assert_eq!(orig_uuid_str, new_uuid_str);

不幸的是，parse_str()出现了InvalidShortUuid错误。我想我肯定做错了什么？

rust

2 个回答

  1. Best Answer

    看起来ShortCustomUuid::parse_str是有缺陷的，或者至少只适用于像 58 个字符的字母表FLICKR_BASE_58。

    我在这里报告了一个问题：https://github.com/radim10/short-uuid/issues/4

    幸运的是，看起来有一个解决方法，即使用它的BaseConverter类型（这是parse_str内部使用的）手动转换字节：

    use short_uuid::converter::BaseConverter;
use short_uuid::{CustomTranslator, ShortUuidCustom, COOKIE_BASE_90};
use uuid::Uuid;

fn main() {
    let translator = CustomTranslator::new(COOKIE_BASE_90).unwrap();
    let orig_uuid_str = "420e04de-4f06-4e3b-8718-9f6ede92ea9e";
    let short = ShortUuidCustom::from_uuid_str(orig_uuid_str, &translator).unwrap();
    let short_uuid_str = short.to_string();

    // let short = ShortUuidCustom::parse_str(&short_uuid_str, &translator).unwrap();

    let converter = BaseConverter::new_custom(COOKIE_BASE_90).unwrap();
    let uuid_str = converter.convert_to_hex(short_uuid_str.as_bytes()).unwrap();
    let uuid: Uuid = uuid_str.parse().unwrap();
    println!("{uuid}");
}

    420e04de-4f06-4e3b-8718-9f6ede92ea9e
    • 1

  2. 链接的板条箱有一个可以做到这一点的例子（甚至是一个使用自定义字母表的例子），将该示例调整为从字符串解析很简单，如下所示：

    let read_from_barcode = ...;
let parsed = ShortUuid::parse_str(read_from_barcode).unwrap();
let uuid = parsed.to_uuid();

    使用自定义字母表：

    let custom_alphabet = "yourCustomAlphabet";
let translator = CustomTranslator::new(custom_alphabet).unwrap();

let read_from_barcode = ...;
let parsed = ShortCustomUuid::parse_str(read_from_barcode, &translator);
let uuid = parsed.to_uuid(&translator).unwrap();
    • 0

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