[server] Move basic auth handler to auth package

server/internal/api/auth/auth_basic.go

@@ -0,0 +1,33 @@
+package auth
+
+import (
+	"errors"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/shroff/phylum/server/internal/core"
+	"github.com/sirupsen/logrus"
+)
+
+func CreateBasicAuthHandler(a *core.App) func(c *gin.Context) {
+	return func(c *gin.Context) {
+		if username, pass, ok := c.Request.BasicAuth(); !ok {
+			c.Header("WWW-Authenticate", "Basic realm=\"Phylum WebDAV\"")
+			c.AbortWithStatus(http.StatusUnauthorized)
+		} else if user, err := a.VerifyUserPassword(c.Request.Context(), username, pass); err != nil {
+			if errors.Is(err, core.ErrCredentialsInvalid) {
+				c.Header("WWW-Authenticate", "Basic realm=\"Phylum WebDAV\"")
+				c.AbortWithStatus(http.StatusUnauthorized)
+			} else {
+				logrus.Warn(err)
+				c.AbortWithStatus(http.StatusInternalServerError)
+			}
+		} else if fs, err := a.OpenFileSystem(c.Request.Context(), user); err != nil {
+			logrus.Warn(err)
+			c.AbortWithStatus(http.StatusInternalServerError)
+		} else {
+			c.Set(keyUser, user)
+			c.Set(keyFileSystem, fs)
+		}
+	}
+}