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redirect.go
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/
redirect.go
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package middleware
import (
"net/http"
"github.com/labstack/echo"
)
type (
// RedirectConfig defines the config for Redirect middleware.
RedirectConfig struct {
// Skipper defines a function to skip middleware.
Skipper Skipper
// Status code to be used when redirecting the request.
// Optional. Default value http.StatusMovedPermanently.
Code int `json:"code"`
}
)
const (
www = "www"
)
var (
// DefaultRedirectConfig is the default Redirect middleware config.
DefaultRedirectConfig = RedirectConfig{
Skipper: DefaultSkipper,
Code: http.StatusMovedPermanently,
}
)
// HTTPSRedirect redirects http requests to https.
// For example, http://labstack.com will be redirect to https://labstack.com.
//
// Usage `Echo#Pre(HTTPSRedirect())`
func HTTPSRedirect() echo.MiddlewareFunc {
return HTTPSRedirectWithConfig(DefaultRedirectConfig)
}
// HTTPSRedirectWithConfig returns an HTTPSRedirect middleware with config.
// See `HTTPSRedirect()`.
func HTTPSRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
// Defaults
if config.Skipper == nil {
config.Skipper = DefaultTrailingSlashConfig.Skipper
}
if config.Code == 0 {
config.Code = DefaultRedirectConfig.Code
}
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
if config.Skipper(c) {
return next(c)
}
req := c.Request()
host := req.Host
uri := req.RequestURI
if !c.IsTLS() {
return c.Redirect(config.Code, "https://"+host+uri)
}
return next(c)
}
}
}
// HTTPSWWWRedirect redirects http requests to https www.
// For example, http://labstack.com will be redirect to https://www.labstack.com.
//
// Usage `Echo#Pre(HTTPSWWWRedirect())`
func HTTPSWWWRedirect() echo.MiddlewareFunc {
return HTTPSWWWRedirectWithConfig(DefaultRedirectConfig)
}
// HTTPSWWWRedirectWithConfig returns an HTTPSRedirect middleware with config.
// See `HTTPSWWWRedirect()`.
func HTTPSWWWRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
// Defaults
if config.Skipper == nil {
config.Skipper = DefaultTrailingSlashConfig.Skipper
}
if config.Code == 0 {
config.Code = DefaultRedirectConfig.Code
}
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
if config.Skipper(c) {
return next(c)
}
req := c.Request()
host := req.Host
uri := req.RequestURI
if !c.IsTLS() && host[:3] != www {
return c.Redirect(config.Code, "https://www."+host+uri)
}
return next(c)
}
}
}
// HTTPSNonWWWRedirect redirects http requests to https non www.
// For example, http://www.labstack.com will be redirect to https://labstack.com.
//
// Usage `Echo#Pre(HTTPSNonWWWRedirect())`
func HTTPSNonWWWRedirect() echo.MiddlewareFunc {
return HTTPSNonWWWRedirectWithConfig(DefaultRedirectConfig)
}
// HTTPSNonWWWRedirectWithConfig returns an HTTPSRedirect middleware with config.
// See `HTTPSNonWWWRedirect()`.
func HTTPSNonWWWRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
// Defaults
if config.Skipper == nil {
config.Skipper = DefaultTrailingSlashConfig.Skipper
}
if config.Code == 0 {
config.Code = DefaultRedirectConfig.Code
}
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
if config.Skipper(c) {
return next(c)
}
req := c.Request()
host := req.Host
uri := req.RequestURI
if !c.IsTLS() {
if host[:3] == www {
return c.Redirect(config.Code, "https://"+host[4:]+uri)
}
return c.Redirect(config.Code, "https://"+host+uri)
}
return next(c)
}
}
}
// WWWRedirect redirects non www requests to www.
// For example, http://labstack.com will be redirect to http://www.labstack.com.
//
// Usage `Echo#Pre(WWWRedirect())`
func WWWRedirect() echo.MiddlewareFunc {
return WWWRedirectWithConfig(DefaultRedirectConfig)
}
// WWWRedirectWithConfig returns an HTTPSRedirect middleware with config.
// See `WWWRedirect()`.
func WWWRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
// Defaults
if config.Skipper == nil {
config.Skipper = DefaultTrailingSlashConfig.Skipper
}
if config.Code == 0 {
config.Code = DefaultRedirectConfig.Code
}
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
if config.Skipper(c) {
return next(c)
}
req := c.Request()
scheme := c.Scheme()
host := req.Host
if host[:3] != www {
uri := req.RequestURI
return c.Redirect(config.Code, scheme+"://www."+host+uri)
}
return next(c)
}
}
}
// NonWWWRedirect redirects www requests to non www.
// For example, http://www.labstack.com will be redirect to http://labstack.com.
//
// Usage `Echo#Pre(NonWWWRedirect())`
func NonWWWRedirect() echo.MiddlewareFunc {
return NonWWWRedirectWithConfig(DefaultRedirectConfig)
}
// NonWWWRedirectWithConfig returns an HTTPSRedirect middleware with config.
// See `NonWWWRedirect()`.
func NonWWWRedirectWithConfig(config RedirectConfig) echo.MiddlewareFunc {
if config.Skipper == nil {
config.Skipper = DefaultTrailingSlashConfig.Skipper
}
if config.Code == 0 {
config.Code = DefaultRedirectConfig.Code
}
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
if config.Skipper(c) {
return next(c)
}
req := c.Request()
scheme := c.Scheme()
host := req.Host
if host[:3] == www {
uri := req.RequestURI
return c.Redirect(config.Code, scheme+"://"+host[4:]+uri)
}
return next(c)
}
}
}