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package v2 |
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import ( |
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"crypto/rand" |
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"encoding/base64" |
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"fmt" |
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"net/http" |
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"sync" |
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"github.com/labstack/echo/v4" |
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"github.com/labstack/echo/v4/middleware" |
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"github.com/memnix/memnix-rest/cmd/v2/config" |
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"github.com/memnix/memnix-rest/domain" |
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) |
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var ( |
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instance *InstanceSingleton //nolint:gochecknoglobals //Singleton |
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once sync.Once //nolint:gochecknoglobals //Singleton |
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) |
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type InstanceSingleton struct { |
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echoInstance *echo.Echo |
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config config.ServerConfig |
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} |
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// New returns a new Echo instance. |
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func GetEchoInstance() *echo.Echo { |
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return instance.echoInstance |
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} |
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func GetEchoSingleton() *InstanceSingleton { |
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once.Do(func() { |
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instance = &InstanceSingleton{} |
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instance.echoInstance = echo.New() |
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instance.registerMiddlewares(instance.echoInstance) |
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instance.registerStaticRoutes(instance.echoInstance) |
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instance.registerRoutes(instance.echoInstance) |
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}) |
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return instance |
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} |
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func CreateEchoInstance(config config.ServerConfig) *InstanceSingleton { |
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return GetEchoSingleton().WithConfig(config) |
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} |
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func (i *InstanceSingleton) Start() error { |
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if err := i.echoInstance.Start(":" + i.config.Port); err != nil { |
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return err |
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} |
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return nil |
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} |
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func (i *InstanceSingleton) WithConfig(config config.ServerConfig) *InstanceSingleton { |
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i.config = config |
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return i |
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} |
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func (i *InstanceSingleton) registerMiddlewares(e *echo.Echo) { |
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e.Use(middleware.CORSWithConfig(middleware.CORSConfig{ |
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AllowOrigins: []string{"http://localhost", i.config.FrontendURL, i.config.Host}, |
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AllowHeaders: []string{echo.HeaderOrigin, echo.HeaderContentType, echo.HeaderAccept}, |
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})) |
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e.Use(CSPMiddleware) |
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// if debug |
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if config.IsDevelopment() { |
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e.Use(middleware.Logger()) |
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} |
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// e.Use(middleware.Recover()) |
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e.Use(middleware.Secure()) |
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csrfConfig := middleware.CSRFWithConfig(middleware.CSRFConfig{ |
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TokenLookup: "cookie:_csrf", |
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CookiePath: "/", |
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CookieDomain: i.config.Host, |
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CookieSecure: true, |
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CookieHTTPOnly: true, |
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CookieSameSite: http.SameSiteStrictMode, |
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}) |
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e.Use(csrfConfig) |
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} |
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func generateSecureNonce() (string, error) { |
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nonce := make([]byte, config.NonceLength) |
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_, err := rand.Read(nonce) |
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if err != nil { |
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return "", err |
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} |
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return base64.URLEncoding.EncodeToString(nonce), err |
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} |
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func CSPMiddleware(next echo.HandlerFunc) echo.HandlerFunc { |
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return func(c echo.Context) error { |
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htmxNonce, _ := generateSecureNonce() |
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hyperscriptNonce, _ := generateSecureNonce() |
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twNonce, _ := generateSecureNonce() |
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preloadNonce, _ := generateSecureNonce() |
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htmxCSSHash := "sha256-pgn1TCGZX6O77zDvy0oTODMOxemn0oj0LeCnQTRj7Kg=" |
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cspHeader := fmt.Sprintf( |
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"default-src 'self'; script-src 'nonce-%s' 'nonce-%s' 'nonce-%s'; style-src 'self' 'nonce-%s' https://fonts.bunny.net '%s'; font-src https://fonts.bunny.net 'self'", |
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htmxNonce, hyperscriptNonce, preloadNonce, twNonce, htmxCSSHash) |
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c.Response().Header().Set("Content-Security-Policy", cspHeader) |
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c.Set("nonce", domain.Nonce{ |
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HtmxNonce: htmxNonce, |
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HyperscriptNonce: hyperscriptNonce, |
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TwNonce: twNonce, |
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PreloadNonce: preloadNonce, |
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}) |
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c.Set("preloadNonce", preloadNonce) |
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c.Set("htmxNonce", htmxNonce) |
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c.Set("twNonce", twNonce) |
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c.Set("hyperscriptNonce", hyperscriptNonce) |
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return next(c) |
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} |
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} |
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func StaticAssetsCacheControlMiddleware(next echo.HandlerFunc) echo.HandlerFunc { |
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return func(c echo.Context) error { |
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c.Response().Header().Set("Cache-Control", "public, max-age=31536000") |
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return next(c) |
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} |
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} |
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func StaticPageCacheControlMiddleware(next echo.HandlerFunc) echo.HandlerFunc { |
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return func(c echo.Context) error { |
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// Set Cache-Control header |
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c.Response().Header().Set("Cache-Control", "private, max-age=60") |
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return next(c) |
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} |
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} |
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memnix /
memnix-rest
