ID type with marshalling to/from hash to prevent sending IDs to clients.

Last update: Dec 10, 2022

Related tags

Overview

Hide IDs

Hide is a simple package to provide an ID type that is marshalled to/from a hash string. This prevents sending technical IDs to clients and converts them on the API layer. Hide uses hashids as its default hash function. But you can provide your own by implementing the Hash interface and configure it using hide.UseHash.

Read our full article on Medium.

Installation

go get github.com/emvi/hide

Example

Consider the following struct:

type User struct {
    Id       int64  `json:"id"`
    Username string `json:"username"`
}

When marshalling this struct to JSON, the ID will be represented by a number:

{
    "id": 123,
    "username": "foobar"
}

In this case you expose the technical user ID to your clients. By changing the type of the ID, you get a better result:

type User struct {
    Id       hide.ID `json:"id"`
    Username string  `json:"username"`
}

Notice that the int64 ID got replaced by the hide.ID, which internally is represented as an int64 as well, but implements the marshal interface. This allows you to cast between them and use hide.ID as a replacement. The resulting JSON changes to the following:

{
  "id": "beJarVNaQM",
  "username": "foobar"
}

If you send the new ID (which is a string now) back to the server and unmarshal it into the hide.ID type, you'll get the original technical ID back. It's also worth mentioning that a value of 0 is translated to null when an ID is marshalled to JSON or stored in database.

View the full demo

Contribute

See CONTRIBUTING.md

License

MIT

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Releases(v1.1.4)

v1.1.4(Nov 9, 2021)

Source code(tar.gz)
Source code(zip)
v1.1.3(Nov 9, 2021)

Source code(tar.gz)
Source code(zip)
v1.1.2(Jan 31, 2021)

Just to include the latest readme.
Source code(tar.gz)
Source code(zip)
v1.1.1(Jun 23, 2020)

Proper go module versioning...
Source code(tar.gz)
Source code(zip)
1.1.1(Feb 19, 2019)
improved documentation

Source code(tar.gz)
Source code(zip)
1.1.0(Feb 5, 2019)
added convince function to parse IDs from hash strings

added convince function to encode IDs to hash strings

added error when trying to decode an empty string

fixed unmarshalling null

Source code(tar.gz)
Source code(zip)
1.0.0(Jan 22, 2019)

Source code(tar.gz)
Source code(zip)

ID type with marshalling to/from hash to prevent sending IDs to clients.

Related tags

Overview

Hide IDs

Installation

Example

Contribute

License

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Releases(v1.1.4)

v1.1.4(Nov 9, 2021)

v1.1.3(Nov 9, 2021)

v1.1.2(Jan 31, 2021)

v1.1.1(Jun 23, 2020)

1.1.1(Feb 19, 2019)

1.1.0(Feb 5, 2019)

1.0.0(Jan 22, 2019)

Owner

Emvi

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