middlewarex

README

Middlewarex

Bunch of middlewares for Labstack Echo.

Requirements

• Echo 4.x.x

Usage

CRUD

Used for creating RESTful API entrypoints according the given struct.

Versioning

This middleware must be set as a pre middleware.

Doing the following request:

X-Application-Version: vnd.github.v3
GET /toto

will be rewritten as:

GET /v3/toto

Bechmarks

[middlewarex]>> go test -bench .
goos: darwin
goarch: amd64
pkg: github.com/mdouchement/middlewarex
BenchmarkVersioningRW-8     	  300000	     50608 ns/op   // With header rewriting
BenchmarkVersioningVRwM-8   	 5000000	       362 ns/op   // Just versioned routes with the Versioning middleware present
BenchmarkVersioningVR-8     	10000000	       215 ns/op   // Just versioned routes without the Versioning middleware
PASS
ok  	github.com/mdouchement/middlewarex	19.850s

If the header is not specified, no rewrittes are applied.

License

MIT

Contributing

All PRs are welcome.

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

As possible, run the following commands to format and lint the code:

# Format
find . -name '*.go' -not -path './vendor*' -exec gofmt -s -w {} \;

# Lint
golangci-lint run -c .golangci.yml

Documentation

Index

• Constants
• Variables
• func CRUD(group *echo.Group, path string, resource interface{})
• func PASETO(key []byte) echo.MiddlewareFunc
• func PASETOWithConfig(config PASETOConfig) echo.MiddlewareFunc
• func Versioning(stable string, supported ...string) echo.MiddlewareFunc
• type CreateSupported
• type DeleteSupported
• type ListSupported
• type PASETOConfig
• type PASETOErrorHandler
• type PASETOErrorHandlerWithContext
• type PASETOSuccessHandler
• type ShowSupported
• type Token
• type UpdateSupported

Constants

const (
	// XApplicationVersion is the header for the asked API version (e.g. vnd.github.v1)
	XApplicationVersion = "X-Application-Version"
	// XApplicationStableVersion is the header for the stable API version (e.g. vnd.github.v3)
	XApplicationStableVersion = "X-Application-Stable-Version"
)

Variables

var (
	ErrPASETOMissing     = echo.NewHTTPError(http.StatusBadRequest, "missing or malformed paseto")
	ErrPASETOUnsupported = echo.NewHTTPError(http.StatusBadRequest, "unsupported paseto version/purpose")
)

Errors

var (
	// DefaultPASETOConfig is the default PASETO auth middleware config.
	DefaultPASETOConfig = PASETOConfig{
		Skipper:     middleware.DefaultSkipper,
		ContextKey:  "paseto",
		TokenLookup: "header:" + echo.HeaderAuthorization,
		AuthScheme:  "Bearer",
		Validators:  []paseto.Validator{},
	}
)

Functions

func CRUD

func CRUD(group *echo.Group, path string, resource interface{})

CRUD defines the folowwing resources:

POST:   /path
GET:    /path
GET:    /path/:id
PATCH:  /path/:id
DEL:    /path/:id

func PASETO

func PASETO(key []byte) echo.MiddlewareFunc

PASETO returns a JSON Platform-Agnostic SEcurity TOkens (PASETO) auth middleware.

For valid token, it sets the user in context and calls next handler. For invalid token, it returns "401 - Unauthorized" error. For missing token, it returns "400 - Bad Request" error.

func PASETOWithConfig

func PASETOWithConfig(config PASETOConfig) echo.MiddlewareFunc

PASETOWithConfig returns a PASETO auth middleware with config.

func Versioning

func Versioning(stable string, supported ...string) echo.MiddlewareFunc

Versioning rewrites routes to match the last part of the version header. e.g. `X-Application-Version: vnd.github.v3' header will prefix the request's path by `/v3'. The stable API version will be returned in the response's headers.

Types

type CreateSupported

type CreateSupported interface {
	Create(echo.Context) error
}

CreateSupported interface

type DeleteSupported

type DeleteSupported interface {
	Delete(echo.Context) error
}

DeleteSupported interface

type ListSupported

type ListSupported interface {
	List(echo.Context) error
}

ListSupported interface

type PASETOConfig

type PASETOConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper middleware.Skipper

	// BeforeFunc defines a function which is executed just before the middleware.
	BeforeFunc middleware.BeforeFunc

	// SuccessHandler defines a function which is executed for a valid token.
	SuccessHandler PASETOSuccessHandler

	// ErrorHandler defines a function which is executed for an invalid token.
	// It may be used to define a custom PASETO error.
	ErrorHandler PASETOErrorHandler

	// ErrorHandlerWithContext is almost identical to ErrorHandler, but it's passed the current context.
	ErrorHandlerWithContext PASETOErrorHandlerWithContext

	// Signing key to validate token.
	// Required.
	SigningKey []byte

	// Validators is the list of custom validators.
	// Time validation is enforced.
	Validators []paseto.Validator

	// Context key to store user information from the token into context.
	// Optional. Default value "user".
	ContextKey string

	// TokenLookup is a string in the form of "<source>:<name>" that is used
	// to extract token from the request.
	// Optional. Default value "header:Authorization".
	// Possible values:
	// - "header:<name>"
	// - "query:<name>"
	// - "param:<name>"
	// - "cookie:<name>"
	TokenLookup string

	// AuthScheme to be used in the Authorization header.
	// Optional. Default value "Bearer".
	AuthScheme string
}

PASETOConfig defines the config for PASETO middleware.

type PASETOErrorHandler

type PASETOErrorHandler func(error) error

PASETOErrorHandler defines a function which is executed for an invalid token.

type PASETOErrorHandlerWithContext

type PASETOErrorHandlerWithContext func(error, echo.Context) error

PASETOErrorHandlerWithContext is almost identical to PASETOErrorHandler, but it's passed the current context.

type PASETOSuccessHandler

type PASETOSuccessHandler func(echo.Context)

PASETOSuccessHandler defines a function which is executed for a valid token.

type ShowSupported

type ShowSupported interface {
	Show(echo.Context) error
}

ShowSupported interface

type Token

type Token struct {
	paseto.JSONToken
	Footer string
}

Token represents a PASETO JSONToken with its footer.

type UpdateSupported

type UpdateSupported interface {
	Update(echo.Context) error
}

UpdateSupported interface