127 lines
3.9 KiB
Go
127 lines
3.9 KiB
Go
package web
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"gardomatic.kleiax.de/lib/client"
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"github.com/justinas/nosurf"
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)
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func secureHeaders(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Security-Policy", "default-src 'self'; style-src 'self'; style-src-attr 'unsafe-inline'; script-src 'self'; img-src 'self' data: blob:; media-src 'self' blob:; manifest-src 'self'; connect-src 'self'")
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w.Header().Set("Permissions-Policy", "camera=(self), microphone=(self)")
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w.Header().Set("Referrer-Policy", "strict-origin-when-cross-origin")
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w.Header().Set("X-Content-Type-Options", "nosniff")
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w.Header().Set("X-Frame-Options", "deny")
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next.ServeHTTP(w, r)
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})
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}
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func (app *application) logRequest(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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app.logger.Info("request", "remote_addr", r.RemoteAddr, "proto", r.Proto, "method", r.Method, "uri", r.URL.RequestURI())
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next.ServeHTTP(w, r)
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})
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}
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func (app *application) recoverPanic(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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defer func() {
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if recovered := recover(); recovered != nil {
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w.Header().Set("Connection", "close")
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app.serverError(w, fmt.Errorf("panic: %v", recovered))
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}
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}()
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next.ServeHTTP(w, r)
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})
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}
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func (app *application) requireAuthentication(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if !app.isAuthenticated(r) {
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http.Redirect(w, r, loginPathForRequest(r), http.StatusSeeOther)
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return
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}
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w.Header().Set("Cache-Control", "no-store")
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next.ServeHTTP(w, r)
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})
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}
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func loginPathForRequest(r *http.Request) string {
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loginPath := webPath("login")
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if r.Method != http.MethodGet {
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return loginPath
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}
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returnTo := safeReturnPath(r.URL.RequestURI())
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if returnTo == "" {
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return loginPath
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}
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return pathWithQuery(loginPath, "return_to", returnTo)
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}
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func (app *application) requireActivatedUser(next http.Handler) http.Handler {
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return app.requireAuthentication(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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user, ok := userFromContext(r.Context())
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if !ok || !user.Activated {
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http.Redirect(w, r, webPath("activate"), http.StatusSeeOther)
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return
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}
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next.ServeHTTP(w, r)
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}))
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}
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func (app *application) noSurf(next http.Handler) http.Handler {
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csrfHandler := nosurf.New(next)
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csrfHandler.SetIsTLSFunc(func(r *http.Request) bool {
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return r.TLS != nil || app.config.CookieSecure
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})
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csrfHandler.SetBaseCookie(http.Cookie{
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Name: "gardomatic_csrf",
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HttpOnly: true,
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Path: "/",
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SameSite: http.SameSiteLaxMode,
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Secure: app.config.CookieSecure,
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})
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return csrfHandler
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}
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func (app *application) withAPIClient(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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requestClient, err := app.apiClient.ForRequest(r)
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if err != nil {
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app.serverError(w, err)
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return
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}
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ctx := client.NewContext(r.Context(), requestClient)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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func (app *application) authenticate(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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apiClient := client.FromContext(r.Context())
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if apiClient == nil {
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app.serverError(w, errors.New("API client missing from request context"))
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return
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}
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user, response, err := apiClient.Session(r.Context())
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if err != nil {
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var apiError *client.APIError
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if errors.As(err, &apiError) && apiError.StatusCode == http.StatusUnauthorized {
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next.ServeHTTP(w, r)
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return
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}
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app.serverError(w, err)
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return
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}
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client.ForwardCookies(w, response)
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ctx := context.WithValue(r.Context(), isAuthenticatedContextKey, true)
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ctx = context.WithValue(ctx, userContextKey, user)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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