package website import ( "context" "errors" "fmt" "net/http" "net/url" "strings" "time" "git.handmade.network/hmn/hmn/src/auth" "git.handmade.network/hmn/hmn/src/config" "git.handmade.network/hmn/hmn/src/db" "git.handmade.network/hmn/hmn/src/hmnurl" "git.handmade.network/hmn/hmn/src/logging" "git.handmade.network/hmn/hmn/src/models" "git.handmade.network/hmn/hmn/src/oops" "git.handmade.network/hmn/hmn/src/perf" "git.handmade.network/hmn/hmn/src/templates" "github.com/jackc/pgx/v4/pgxpool" "github.com/teacat/noire" ) func NewWebsiteRoutes(conn *pgxpool.Pool, perfCollector *perf.PerfCollector) http.Handler { router := &Router{} routes := RouteBuilder{ Router: router, Middleware: func(h Handler) Handler { return func(c *RequestContext) (res ResponseData) { c.Conn = conn logPerf := TrackRequestPerf(c, perfCollector) defer logPerf() defer LogContextErrors(c, &res) return h(c) } }, } mainRoutes := routes mainRoutes.Middleware = func(h Handler) Handler { return func(c *RequestContext) (res ResponseData) { c.Conn = conn logPerf := TrackRequestPerf(c, perfCollector) defer logPerf() defer LogContextErrors(c, &res) ok, errRes := LoadCommonWebsiteData(c) if !ok { return errRes } return h(c) } } staticPages := routes staticPages.Middleware = func(h Handler) Handler { return func(c *RequestContext) (res ResponseData) { c.Conn = conn logPerf := TrackRequestPerf(c, perfCollector) defer logPerf() defer LogContextErrors(c, &res) ok, errRes := LoadCommonWebsiteData(c) if !ok { return errRes } if !c.CurrentProject.IsHMN() { return c.Redirect(hmnurl.Url(c.URL().Path, hmnurl.QFromURL(c.URL())), http.StatusMovedPermanently) } return h(c) } } authMiddleware := func(h Handler) Handler { return func(c *RequestContext) (res ResponseData) { if c.CurrentUser == nil { return c.Redirect(hmnurl.BuildLoginPage(c.FullUrl()), http.StatusSeeOther) } return h(c) } } csrfMiddleware := func(h Handler) Handler { // CSRF mitigation actions per the OWASP cheat sheet: // https://cheatsheetseries.owasp.org/cheatsheets/Cross-Site_Request_Forgery_Prevention_Cheat_Sheet.html return func(c *RequestContext) ResponseData { c.Req.ParseForm() csrfToken := c.Req.Form.Get(auth.CSRFFieldName) if csrfToken != c.CurrentSession.CSRFToken { c.Logger.Warn().Str("userId", c.CurrentUser.Username).Msg("user failed CSRF validation - potential attack?") err := auth.DeleteSession(c.Context(), c.Conn, c.CurrentSession.ID) if err != nil { c.Logger.Error().Err(err).Msg("failed to delete session on CSRF failure") } res := c.Redirect("/", http.StatusSeeOther) res.SetCookie(auth.DeleteSessionCookie) return res } return h(c) } } routes.GET(hmnurl.RegexPublic, func(c *RequestContext) ResponseData { var res ResponseData http.StripPrefix("/public/", http.FileServer(http.Dir("public"))).ServeHTTP(&res, c.Req) AddCORSHeaders(c, &res) return res }) mainRoutes.GET(hmnurl.RegexHomepage, func(c *RequestContext) ResponseData { if c.CurrentProject.IsHMN() { return Index(c) } else { return ProjectHomepage(c) } }) staticPages.GET(hmnurl.RegexManifesto, Manifesto) staticPages.GET(hmnurl.RegexAbout, About) staticPages.GET(hmnurl.RegexCodeOfConduct, CodeOfConduct) staticPages.GET(hmnurl.RegexCommunicationGuidelines, CommunicationGuidelines) staticPages.GET(hmnurl.RegexContactPage, ContactPage) staticPages.GET(hmnurl.RegexMonthlyUpdatePolicy, MonthlyUpdatePolicy) staticPages.GET(hmnurl.RegexProjectSubmissionGuidelines, ProjectSubmissionGuidelines) // TODO(asaf): Have separate middleware for HMN-only routes and any-project routes // NOTE(asaf): HMN-only routes: mainRoutes.GET(hmnurl.RegexOldHome, Index) mainRoutes.POST(hmnurl.RegexLoginAction, Login) mainRoutes.GET(hmnurl.RegexLogoutAction, Logout) mainRoutes.GET(hmnurl.RegexLoginPage, LoginPage) mainRoutes.GET(hmnurl.RegexRegister, RegisterNewUser) mainRoutes.POST(hmnurl.RegexRegister, RegisterNewUserSubmit) mainRoutes.GET(hmnurl.RegexRegistrationSuccess, RegisterNewUserSuccess) mainRoutes.GET(hmnurl.RegexOldEmailConfirmation, EmailConfirmation) // TODO(asaf): Delete this a bit after launch mainRoutes.GET(hmnurl.RegexEmailConfirmation, EmailConfirmation) mainRoutes.POST(hmnurl.RegexEmailConfirmation, EmailConfirmationSubmit) mainRoutes.GET(hmnurl.RegexFeed, Feed) mainRoutes.GET(hmnurl.RegexAtomFeed, AtomFeed) mainRoutes.GET(hmnurl.RegexShowcase, Showcase) mainRoutes.GET(hmnurl.RegexSnippet, Snippet) mainRoutes.GET(hmnurl.RegexProjectIndex, ProjectIndex) mainRoutes.GET(hmnurl.RegexUserProfile, UserProfile) mainRoutes.GET(hmnurl.RegexProjectNotApproved, ProjectHomepage) // NOTE(asaf): Any-project routes: mainRoutes.GET(hmnurl.RegexForumNewThread, authMiddleware(ForumNewThread)) mainRoutes.POST(hmnurl.RegexForumNewThreadSubmit, authMiddleware(csrfMiddleware(ForumNewThreadSubmit))) mainRoutes.GET(hmnurl.RegexForumThread, ForumThread) mainRoutes.GET(hmnurl.RegexForum, Forum) mainRoutes.POST(hmnurl.RegexForumMarkRead, authMiddleware(csrfMiddleware(ForumMarkRead))) mainRoutes.GET(hmnurl.RegexForumPost, ForumPostRedirect) mainRoutes.GET(hmnurl.RegexForumPostReply, authMiddleware(ForumPostReply)) mainRoutes.POST(hmnurl.RegexForumPostReply, authMiddleware(csrfMiddleware(ForumPostReplySubmit))) mainRoutes.GET(hmnurl.RegexForumPostEdit, authMiddleware(ForumPostEdit)) mainRoutes.POST(hmnurl.RegexForumPostEdit, authMiddleware(csrfMiddleware(ForumPostEditSubmit))) mainRoutes.GET(hmnurl.RegexForumPostDelete, authMiddleware(ForumPostDelete)) mainRoutes.POST(hmnurl.RegexForumPostDelete, authMiddleware(csrfMiddleware(ForumPostDeleteSubmit))) mainRoutes.GET(hmnurl.RegexBlog, BlogIndex) mainRoutes.GET(hmnurl.RegexBlogNewThread, authMiddleware(BlogNewThread)) mainRoutes.POST(hmnurl.RegexBlogNewThread, authMiddleware(csrfMiddleware(BlogNewThreadSubmit))) mainRoutes.GET(hmnurl.RegexBlogThread, BlogThread) mainRoutes.GET(hmnurl.RegexBlogPost, BlogPostRedirectToThread) mainRoutes.GET(hmnurl.RegexBlogPostReply, authMiddleware(BlogPostReply)) mainRoutes.POST(hmnurl.RegexBlogPostReply, authMiddleware(csrfMiddleware(BlogPostReplySubmit))) mainRoutes.GET(hmnurl.RegexBlogPostEdit, authMiddleware(BlogPostEdit)) mainRoutes.POST(hmnurl.RegexBlogPostEdit, authMiddleware(csrfMiddleware(BlogPostEditSubmit))) mainRoutes.GET(hmnurl.RegexBlogPostDelete, authMiddleware(BlogPostDelete)) mainRoutes.POST(hmnurl.RegexBlogPostDelete, authMiddleware(csrfMiddleware(BlogPostDeleteSubmit))) mainRoutes.GET(hmnurl.RegexPodcast, PodcastIndex) mainRoutes.GET(hmnurl.RegexPodcastEdit, PodcastEdit) mainRoutes.POST(hmnurl.RegexPodcastEdit, PodcastEditSubmit) mainRoutes.GET(hmnurl.RegexPodcastEpisodeNew, PodcastEpisodeNew) mainRoutes.POST(hmnurl.RegexPodcastEpisodeNew, PodcastEpisodeSubmit) mainRoutes.GET(hmnurl.RegexPodcastEpisodeEdit, PodcastEpisodeEdit) mainRoutes.POST(hmnurl.RegexPodcastEpisodeEdit, PodcastEpisodeSubmit) mainRoutes.GET(hmnurl.RegexPodcastEpisode, PodcastEpisode) mainRoutes.GET(hmnurl.RegexPodcastRSS, PodcastRSS) mainRoutes.GET(hmnurl.RegexProjectCSS, ProjectCSS) mainRoutes.GET(hmnurl.RegexEditorPreviewsJS, func(c *RequestContext) ResponseData { var res ResponseData res.MustWriteTemplate("editorpreviews.js", nil, c.Perf) res.Header().Add("Content-Type", "application/javascript") return res }) // Other mainRoutes.AnyMethod(hmnurl.RegexCatchAll, FourOhFour) return router } func getBaseData(c *RequestContext) templates.BaseData { var templateUser *templates.User var templateSession *templates.Session if c.CurrentUser != nil { u := templates.UserToTemplate(c.CurrentUser, c.Theme) s := templates.SessionToTemplate(c.CurrentSession) templateUser = &u templateSession = &s } return templates.BaseData{ Theme: c.Theme, CurrentUrl: c.FullUrl(), LoginPageUrl: hmnurl.BuildLoginPage(c.FullUrl()), ProjectCSSUrl: hmnurl.BuildProjectCSS(c.CurrentProject.Color1), Project: templates.ProjectToTemplate(c.CurrentProject, c.Theme), User: templateUser, Session: templateSession, IsProjectPage: !c.CurrentProject.IsHMN(), Header: templates.Header{ AdminUrl: hmnurl.BuildHomepage(), // TODO(asaf) UserSettingsUrl: hmnurl.BuildHomepage(), // TODO(asaf) LoginActionUrl: hmnurl.BuildLoginAction(c.FullUrl()), LogoutActionUrl: hmnurl.BuildLogoutAction(c.FullUrl()), RegisterUrl: hmnurl.BuildRegister(), HMNHomepageUrl: hmnurl.BuildHomepage(), ProjectHomepageUrl: hmnurl.BuildProjectHomepage(c.CurrentProject.Slug), ProjectIndexUrl: hmnurl.BuildProjectIndex(1), BlogUrl: hmnurl.BuildBlog(c.CurrentProject.Slug, 1), ForumsUrl: hmnurl.BuildForum(c.CurrentProject.Slug, nil, 1), LibraryUrl: hmnurl.BuildLibrary(c.CurrentProject.Slug), ManifestoUrl: hmnurl.BuildManifesto(), EpisodeGuideUrl: hmnurl.BuildHomepage(), // TODO(asaf) EditUrl: "", SearchActionUrl: hmnurl.BuildHomepage(), // TODO(asaf) }, Footer: templates.Footer{ HomepageUrl: hmnurl.BuildHomepage(), AboutUrl: hmnurl.BuildAbout(), ManifestoUrl: hmnurl.BuildManifesto(), CodeOfConductUrl: hmnurl.BuildCodeOfConduct(), CommunicationGuidelinesUrl: hmnurl.BuildCommunicationGuidelines(), ProjectIndexUrl: hmnurl.BuildProjectIndex(1), ForumsUrl: hmnurl.BuildForum(models.HMNProjectSlug, nil, 1), ContactUrl: hmnurl.BuildContactPage(), SitemapUrl: hmnurl.BuildSiteMap(), }, } } func FetchProjectBySlug(ctx context.Context, conn *pgxpool.Pool, slug string) (*models.Project, error) { if len(slug) > 0 && slug != models.HMNProjectSlug { subdomainProjectRow, err := db.QueryOne(ctx, conn, models.Project{}, "SELECT $columns FROM handmade_project WHERE slug = $1", slug) if err == nil { subdomainProject := subdomainProjectRow.(*models.Project) return subdomainProject, nil } else if !errors.Is(err, db.ErrNoMatchingRows) { return nil, oops.New(err, "failed to get projects by slug") } else { return nil, nil } } else { defaultProjectRow, err := db.QueryOne(ctx, conn, models.Project{}, "SELECT $columns FROM handmade_project WHERE id = $1", models.HMNProjectID) if err != nil { if errors.Is(err, db.ErrNoMatchingRows) { return nil, oops.New(nil, "default project didn't exist in the database") } else { return nil, oops.New(err, "failed to get default project") } } defaultProject := defaultProjectRow.(*models.Project) return defaultProject, nil } } func ProjectCSS(c *RequestContext) ResponseData { color := c.URL().Query().Get("color") if color == "" { return ErrorResponse(http.StatusBadRequest, NewSafeError(nil, "You must provide a 'color' parameter.\n")) } baseData := getBaseData(c) bgColor := noire.NewHex(color) h, s, l := bgColor.HSL() if baseData.Theme == "dark" { l = 15 } else { l = 95 } if s > 20 { s = 20 } bgColor = noire.NewHSL(h, s, l) templateData := struct { templates.BaseData Color string PostBgColor string }{ BaseData: baseData, Color: color, PostBgColor: bgColor.HTML(), } var res ResponseData res.Header().Add("Content-Type", "text/css") err := res.WriteTemplate("project.css", templateData, c.Perf) if err != nil { return ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to generate project CSS")) } return res } func FourOhFour(c *RequestContext) ResponseData { var res ResponseData res.StatusCode = http.StatusNotFound if c.Req.Header["Accept"] != nil && strings.Contains(c.Req.Header["Accept"][0], "text/html") { templateData := struct { templates.BaseData Wanted string }{ BaseData: getBaseData(c), Wanted: c.FullUrl(), } res.MustWriteTemplate("404.html", templateData, c.Perf) } else { res.Write([]byte("Not Found")) } return res } type RejectData struct { templates.BaseData RejectReason string } func RejectRequest(c *RequestContext, reason string) ResponseData { var res ResponseData err := res.WriteTemplate("reject.html", RejectData{ BaseData: getBaseData(c), RejectReason: reason, }, c.Perf) if err != nil { return ErrorResponse(http.StatusInternalServerError, oops.New(err, "Failed to render reject template")) } return res } func LoadCommonWebsiteData(c *RequestContext) (bool, ResponseData) { c.Perf.StartBlock("MIDDLEWARE", "Load common website data") defer c.Perf.EndBlock() // get project { hostPrefix := strings.TrimSuffix(c.Req.Host, hmnurl.GetBaseHost()) slug := strings.TrimRight(hostPrefix, ".") dbProject, err := FetchProjectBySlug(c.Context(), c.Conn, slug) if err != nil { return false, ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch current project")) } if dbProject == nil { return false, c.Redirect(hmnurl.BuildHomepage(), http.StatusSeeOther) } c.CurrentProject = dbProject } { sessionCookie, err := c.Req.Cookie(auth.SessionCookieName) if err == nil { user, session, err := getCurrentUserAndSession(c, sessionCookie.Value) if err != nil { return false, ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to get current user")) } c.CurrentUser = user c.CurrentSession = session } // http.ErrNoCookie is the only error Cookie ever returns, so no further handling to do here. } theme := "light" if c.CurrentUser != nil && c.CurrentUser.DarkTheme { theme = "dark" } c.Theme = theme return true, ResponseData{} } func AddCORSHeaders(c *RequestContext, res *ResponseData) { parsed, err := url.Parse(config.Config.BaseUrl) if err != nil { c.Logger.Error().Str("Config.BaseUrl", config.Config.BaseUrl).Msg("Config.BaseUrl cannot be parsed. Skipping CORS headers") return } origin := "" origins, found := c.Req.Header["Origin"] if found { origin = origins[0] } if strings.HasSuffix(origin, parsed.Host) { res.Header().Add("Access-Control-Allow-Origin", origin) res.Header().Add("Vary", "Origin") } } // Given a session id, fetches user data from the database. Will return nil if // the user cannot be found, and will only return an error if it's serious. func getCurrentUserAndSession(c *RequestContext, sessionId string) (*models.User, *models.Session, error) { session, err := auth.GetSession(c.Context(), c.Conn, sessionId) if err != nil { if errors.Is(err, auth.ErrNoSession) { return nil, nil, nil } else { return nil, nil, oops.New(err, "failed to get current session") } } userRow, err := db.QueryOne(c.Context(), c.Conn, models.User{}, "SELECT $columns FROM auth_user WHERE username = $1", session.Username) if err != nil { if errors.Is(err, db.ErrNoMatchingRows) { logging.Debug().Str("username", session.Username).Msg("returning no current user for this request because the user for the session couldn't be found") return nil, nil, nil // user was deleted or something } else { return nil, nil, oops.New(err, "failed to get user for session") } } user := userRow.(*models.User) return user, session, nil } func TrackRequestPerf(c *RequestContext, perfCollector *perf.PerfCollector) (after func()) { c.Perf = perf.MakeNewRequestPerf(c.Route, c.Req.Method, c.Req.URL.Path) return func() { c.Perf.EndRequest() log := logging.Info() blockStack := make([]time.Time, 0) for i, block := range c.Perf.Blocks { for len(blockStack) > 0 && block.End.After(blockStack[len(blockStack)-1]) { blockStack = blockStack[:len(blockStack)-1] } log.Str(fmt.Sprintf("[%4.d] At %9.2fms", i, c.Perf.MsFromStart(&block)), fmt.Sprintf("%*.s[%s] %s (%.4fms)", len(blockStack)*2, "", block.Category, block.Description, block.DurationMs())) blockStack = append(blockStack, block.End) } log.Msg(fmt.Sprintf("Served [%s] %s in %.4fms", c.Perf.Method, c.Perf.Path, float64(c.Perf.End.Sub(c.Perf.Start).Nanoseconds())/1000/1000)) perfCollector.SubmitRun(c.Perf) } } func LogContextErrors(c *RequestContext, res *ResponseData) { for _, err := range res.Errors { c.Logger.Error().Timestamp().Stack().Str("Requested", c.FullUrl()).Err(err).Msg("error occurred during request") } }