42LoCo42 / echotool

A setup helper for https://echo.labstack.com

echotool

Helper functions for working with echo - a web framework for Go.

Features

• HTTP error helper (Die)
• request logging
• static file loading from the static directory
• user authentication: password login → JWT (Auth middleware)

  curl localhost:8080/api/login -d username=user -d password=pass -c cookie
  # the Login endpoint returns the auth JWT as string
  # and also sets the auth cookie to that JWT
      

• when an empty JWT key is passed, SetupDefaultEcho will print one and return nil

Usage

import (
    "embed"
    "net/http"

    "github.com/42LoCo42/echotool"
)

//go:embed static
var embedFS embedFS

type User struct {
    Name string
    Hash string
}

func main() {
    e, api := echotool.SetupDefaultEcho(
        http.FS(embedFS), // directory for static files (can be nil to read from disk)

        os.Getenv("JWT_KEY_VAR"), // auth token key
        "appname",                // auth token issuer
        time.Hour*24,             // auth token lifetime

        func(name string) (*User, error) {
            // find a user by name
            panic("TODO implement this!")
        },

        // get a user's hash
        func(user *User) (string, error) {
            return user.Hash, nil
        },
    )
    if e == nil {
        os.Exit(1)
    }

    e.GET("/example", func(c echo.Context) error {
        return c.JSON(http.StatusOK, c.Get("user"))
    }, echotool.Auth) // this endpoint requires authentication

    e.GET("/error", func(c echo.Context) error {
        return echotool.Die(http.StatusInternalServerError, nil, "error message")
    })

    e.Start(":8080")
}