From b85fbde28571f2c17a72a685d711b84139ace155 Mon Sep 17 00:00:00 2001
From: Giuseppe Lo Presti <giuseppe.lopresti@cern.ch>
Date: Thu, 6 Jul 2023 17:44:41 +0200
Subject: [PATCH] Added /app/notify endpoint for logging/tracking apps (#4044)

---
 changelog/unreleased/app-notif.md             |  7 ++++
 .../http/services/appprovider/appprovider.go  | 37 +++++++++++++++++++
 pkg/app/provider/wopi/wopi.go                 |  1 -
 3 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 changelog/unreleased/app-notif.md

diff --git a/changelog/unreleased/app-notif.md b/changelog/unreleased/app-notif.md
new file mode 100644
index 0000000000..f40064a213
--- /dev/null
+++ b/changelog/unreleased/app-notif.md
@@ -0,0 +1,7 @@
+Enhancement: added an /app/notify endpoint for logging/tracking apps
+
+The new endpoint serves to probe the health state of apps such as
+Microsoft Office Online, and it is expected to be called by the frontend
+upon successful loading of the document by the underlying app
+
+https://github.com/cs3org/reva/pull/4044
diff --git a/internal/http/services/appprovider/appprovider.go b/internal/http/services/appprovider/appprovider.go
index c57d9fbc78..c094b11b39 100644
--- a/internal/http/services/appprovider/appprovider.go
+++ b/internal/http/services/appprovider/appprovider.go
@@ -29,6 +29,7 @@ import (
 	provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
 	typespb "github.com/cs3org/go-cs3apis/cs3/types/v1beta1"
 	"github.com/cs3org/reva/internal/http/services/datagateway"
+	"github.com/cs3org/reva/pkg/appctx"
 	"github.com/cs3org/reva/pkg/rgrpc/status"
 	"github.com/cs3org/reva/pkg/rgrpc/todo/pool"
 	"github.com/cs3org/reva/pkg/rhttp"
@@ -91,6 +92,7 @@ func (s *svc) routerInit() error {
 	s.router.Get("/list", s.handleList)
 	s.router.Post("/new", s.handleNew)
 	s.router.Post("/open", s.handleOpen)
+	s.router.Post("/notify", s.handleNotify)
 	return nil
 }
 
@@ -419,6 +421,9 @@ func (s *svc) handleOpen(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	log := appctx.GetLogger(ctx)
+	log.Info().Str("url", openRes.AppUrl.AppUrl).Interface("resource", fileRef).Msg("returning app URL for file")
+
 	w.Header().Set("Content-Type", "application/json")
 	if _, err = w.Write(js); err != nil {
 		writeError(w, r, appErrorServerError, "Internal error with JSON payload",
@@ -427,6 +432,38 @@ func (s *svc) handleOpen(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+func (s *svc) handleNotify(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseForm()
+	if err != nil {
+		writeError(w, r, appErrorInvalidParameter, "parameters could not be parsed", nil)
+	}
+
+	fileID := r.Form.Get("file_id")
+	var fileRef provider.Reference
+	if fileID == "" {
+		path := r.Form.Get("path")
+		if path == "" {
+			writeError(w, r, appErrorInvalidParameter, "missing file ID or path", nil)
+			return
+		}
+		fileRef.Path = path
+	} else {
+		resourceID := resourceid.OwnCloudResourceIDUnwrap(fileID)
+		if resourceID == nil {
+			writeError(w, r, appErrorInvalidParameter, "invalid file ID", nil)
+			return
+		}
+		fileRef.ResourceId = resourceID
+	}
+
+	// log the fileid for later correlation / monitoring
+	ctx := r.Context()
+	log := appctx.GetLogger(ctx)
+	log.Info().Interface("resource", fileRef).Msg("file successfully opened in app")
+
+	w.WriteHeader(http.StatusOK)
+}
+
 func filterAppsByUserAgent(mimeTypes []*appregistry.MimeTypeInfo, userAgent string) []*appregistry.MimeTypeInfo {
 	ua := ua.Parse(userAgent)
 	res := []*appregistry.MimeTypeInfo{}
diff --git a/pkg/app/provider/wopi/wopi.go b/pkg/app/provider/wopi/wopi.go
index b3bfd46415..d4bbc58778 100644
--- a/pkg/app/provider/wopi/wopi.go
+++ b/pkg/app/provider/wopi/wopi.go
@@ -338,7 +338,6 @@ func (p *wopiProvider) GetAppURL(ctx context.Context, resource *provider.Resourc
 		}
 	}
 
-	log.Info().Str("url", appFullURL).Str("resource", resource.Path).Msg("wopi: returning URL for file")
 	return &appprovider.OpenInAppURL{
 		AppUrl:         appFullURL,
 		Method:         method,