add auth

and some other improvements

web/server.go

@@ -0,0 +1,105 @@
+package web
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"net/http"
+	"time"
+
+	"github.com/gorilla/sessions"
+	echo "github.com/labstack/echo/v4"
+	"github.com/sirupsen/logrus"
+
+	"git.janky.solutions/finn/go-project-template/config"
+)
+
+var server *echo.Echo
+
+func ListenAndServe() {
+	sessionStore = sessions.NewCookieStore([]byte(config.C.Web.SessionKey))
+
+	server = echo.New()
+	server.HideBanner = true
+	server.HidePort = true
+	server.HTTPErrorHandler = handleError
+	server.Renderer = &Template{}
+	server.Use(accessLogMiddleware, sessionMiddleware)
+	server.RouteNotFound("/*", notFoundHandler)
+
+	server.GET("/auth/begin", authBegin)
+	server.GET("/auth/finish", authFinish)
+
+	server.GET("/", index, authMiddleware)
+
+	server.StaticFS("/static", Static)
+
+	logrus.WithField("address", config.C.Web.Bind).Info("starting http server")
+	err := server.Start(config.C.Web.Bind)
+	if err != http.ErrServerClosed {
+		logrus.WithError(err).Fatal("error starting http server")
+	}
+}
+
+func Shutdown(ctx context.Context) error {
+	if server == nil {
+		return nil
+	}
+
+	return server.Shutdown(ctx)
+}
+
+func accessLogMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
+	return func(c echo.Context) error {
+		start := time.Now()
+		err := next(c)
+
+		log := logrus.WithFields(logrus.Fields{
+			"method":   c.Request().Method,
+			"path":     c.Request().URL.Path,
+			"duration": time.Since(start),
+			"status":   c.Response().Status,
+			"source":   c.Request().RemoteAddr,
+		})
+		if err != nil {
+			log = log.WithError(err)
+		}
+		log.Debug("request handled")
+
+		return err
+	}
+}
+
+func handleError(err error, c echo.Context) {
+	if errors.Is(err, sql.ErrNoRows) {
+		logrus.Debug("sending 404 because handler threw sql.ErrNoRows")
+		err = notFoundHandler(c)
+		if err == nil {
+			return
+		}
+	}
+
+	logrus.WithFields(logrus.Fields{
+		"path":   c.Request().URL.Path,
+		"method": c.Request().Method,
+		"error":  err,
+	}).Error("error handling request")
+
+	_ = c.Render(http.StatusNotFound, "500.html", nil)
+}
+
+func notFoundHandler(c echo.Context) error {
+	return c.Render(http.StatusNotFound, "404.html", nil)
+}
+
+func sessionMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
+	return func(c echo.Context) error {
+		session, err := sessionStore.Get(c.Request(), sessionName)
+		if err != nil {
+			return err
+		}
+
+		c.Set(contextKeySession, session)
+		return next(c)
+	}
+}