https://github.com/alancesar/gin-error-handler-sample

Handling with errors in gin-gonic
https://github.com/alancesar/gin-error-handler-sample

error-handling gin gin-gonic go golang

Last synced: about 1 month ago
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Handling with errors in gin-gonic

• Host: GitHub
• URL: https://github.com/alancesar/gin-error-handler-sample
• Owner: alancesar
• Created: 2021-11-19T20:43:37.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-01-11T21:03:29.000Z (almost 3 years ago)
• Last Synced: 2024-09-30T07:21:59.015Z (about 2 months ago)
• Topics: error-handling, gin, gin-gonic, go, golang
• Language: Go
• Homepage:
• Size: 8.79 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Handling errors in gin-gonic

## Starting application

```shell

go mod dowload

go run main.go

```

## Request

```shell

curl --location --request POST 'http://localhost:8080/api' \

--header 'Content-Type: application/json' \

--data-raw '{

    "id": "some-id",

    "fail_database": false,

    "fail_service": false

}'

```

## Errors

There are two errors struct: `database.Err` and `service.Err`.

They implement `error` interface `Error() string` and `Is(target error) bool`,

returning true if `target` is `pkg.InternalErr`.

## Middleware

The middleware `ErrorHandlerMiddleware()` get the errors from gin-gonic context.

If present, check if it is a `pkg.InternalErr`.

Case true, return an internal server error; otherwise, return bad request.  

This middleware also checks if `err.Err` is a `database.Err` and prints additional logs.

## Handler

The `api.Handler` call run `c.Error(err)` to append errors in gin-gonic context.

## Additional information

- [errors.Is documentation](https://pkg.go.dev/errors#Is)

- [gin-gonic bindings](https://github.com/gin-gonic/gin#model-binding-and-validation)