package website import ( "bytes" "context" "errors" "fmt" "net/http" "strings" "time" "git.handmade.network/hmn/hmn/src/auth" "git.handmade.network/hmn/hmn/src/db" "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" ) 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) } } routes.POST("^/login$", Login) routes.GET("^/logout$", Logout) routes.StdHandler("^/public/.*$", http.StripPrefix("/public/", http.FileServer(http.Dir("public"))), ) mainRoutes.GET("^/$", func(c *RequestContext) ResponseData { if c.CurrentProject.IsHMN() { return Index(c) } else { // TODO: Return the project landing page panic("route not implemented") } }) mainRoutes.GET(`^/feed(/(?P.+)?)?$`, Feed) // mainRoutes.GET(`^/(?Pforums(/cat)*)$`, Category) // mainRoutes.GET(`^/(?Pforums(/cat)*)/t/(?P\d+)/p/(?P\d+)$`, ForumPost) mainRoutes.GET("^/assets/project.css$", ProjectCSS) mainRoutes.AnyMethod("", FourOhFour) return router } func getBaseData(c *RequestContext) templates.BaseData { var templateUser *templates.User if c.CurrentUser != nil { templateUser = &templates.User{ Username: c.CurrentUser.Username, Email: c.CurrentUser.Email, IsSuperuser: c.CurrentUser.IsSuperuser, IsStaff: c.CurrentUser.IsStaff, } } return templates.BaseData{ Project: templates.ProjectToTemplate(c.CurrentProject), User: templateUser, Theme: "dark", } } func FetchProjectBySlug(ctx context.Context, conn *pgxpool.Pool, slug string) (*models.Project, error) { 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") } 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")) } templateData := struct { Color string Theme string }{ Color: color, Theme: "dark", } 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 { return ResponseData{ StatusCode: http.StatusNotFound, Body: bytes.NewBufferString("go away\n"), } } func LoadCommonWebsiteData(c *RequestContext) (bool, ResponseData) { c.Perf.StartBlock("MIDDLEWARE", "Load common website data") defer c.Perf.EndBlock() // get project { slug := "" hostParts := strings.SplitN(c.Req.Host, ".", 3) if len(hostParts) >= 3 { slug = hostParts[0] } dbProject, err := FetchProjectBySlug(c.Context(), c.Conn, slug) if err != nil { return false, ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch current project")) } c.CurrentProject = dbProject } { sessionCookie, err := c.Req.Cookie(auth.SessionCookieName) if err == nil { user, err := getCurrentUser(c, sessionCookie.Value) if err != nil { return false, ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to get current user")) } c.CurrentUser = user } // http.ErrNoCookie is the only error Cookie ever returns, so no further handling to do here. } return true, ResponseData{} } // 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 getCurrentUser(c *RequestContext, sessionId string) (*models.User, error) { session, err := auth.GetSession(c.Context(), c.Conn, sessionId) if err != nil { if errors.Is(err, auth.ErrNoSession) { return nil, nil } else { return 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 // user was deleted or something } else { return nil, oops.New(err, "failed to get user for session") } } user := userRow.(*models.User) return user, nil } func TrackRequestPerf(c *RequestContext, perfCollector *perf.PerfCollector) (after func()) { c.Perf = perf.MakeNewRequestPerf(c.Route, c.Req.URL.Path) return func() { c.Perf.EndRequest() log := logging.Info() blockStack := make([]time.Time, 0) for _, 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("At %9.2fms", 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 in %.4fms", 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().Err(err).Msg("error occurred during request") } }