From fb38f0278d42b1de2a2f76c59aa294276aef64a1 Mon Sep 17 00:00:00 2001
From: Jan Palus <jpalus@fastmail.com>
Date: Mon, 15 May 2023 19:16:22 +0200
Subject: [PATCH 1/2] webdav: fastmail: adapt modtime update

to make new logic work with fastmail bring spec compliant update from:
https://github.com/rclone/rclone/pull/6108
---
 backend/webdav/webdav.go | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/backend/webdav/webdav.go b/backend/webdav/webdav.go
index 801e8d970..c91e4950c 100644
--- a/backend/webdav/webdav.go
+++ b/backend/webdav/webdav.go
@@ -178,6 +178,7 @@ type Fs struct {
 	canStream          bool          // set if can stream
 	useOCMtime         bool          // set if can use X-OC-Mtime
 	propsetMtime       bool          // set if can use propset
+	propNameMtime      string        // name of property to set for mtime
 	retryWithZeroDepth bool          // some vendors (sharepoint) won't list files when Depth is 1 (our default)
 	checkBeforePurge   bool          // enables extra check that directory to purge really exists
 	hasOCMD5           bool          // set if can use owncloud style checksums for MD5
@@ -581,18 +582,22 @@ func (f *Fs) setQuirks(ctx context.Context, vendor string) error {
 		f.canStream = true
 		f.precision = time.Second
 		f.useOCMtime = true
+		f.propsetMtime = true
+		f.propNameMtime = "getlastmodified"
 		f.hasMESHA1 = true
 	case "owncloud":
 		f.canStream = true
 		f.precision = time.Second
 		f.useOCMtime = true
 		f.propsetMtime = true
+		f.propNameMtime = "lastmodified"
 		f.hasOCMD5 = true
 		f.hasOCSHA1 = true
 	case "nextcloud":
 		f.precision = time.Second
 		f.useOCMtime = true
 		f.propsetMtime = true
+		f.propNameMtime = "lastmodified"
 		f.hasOCSHA1 = true
 		f.canChunk = true
 
@@ -1322,11 +1327,11 @@ func (o *Object) ModTime(ctx context.Context) time.Time {
 // Set modified time using propset
 //
 // <d:multistatus xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns"><d:response><d:href>/ocm/remote.php/webdav/office/wir.jpg</d:href><d:propstat><d:prop><d:lastmodified/></d:prop><d:status>HTTP/1.1 200 OK</d:status></d:propstat></d:response></d:multistatus>
-var owncloudPropset = `<?xml version="1.0" encoding="utf-8" ?>
+var mtimePropset = `<?xml version="1.0" encoding="utf-8" ?>
 <D:propertyupdate xmlns:D="DAV:">
  <D:set>
   <D:prop>
-   <lastmodified xmlns="DAV:">%d</lastmodified>
+   <D:%s>%s</D:%s>
   </D:prop>
  </D:set>
 </D:propertyupdate>
@@ -1335,11 +1340,17 @@ var owncloudPropset = `<?xml version="1.0" encoding="utf-8" ?>
 // SetModTime sets the modification time of the local fs object
 func (o *Object) SetModTime(ctx context.Context, modTime time.Time) error {
 	if o.fs.propsetMtime {
+		var modTimeStr string
+		if o.fs.propNameMtime == "getlastmodified" {
+			modTimeStr = modTime.Format(time.RFC1123)
+		} else {
+			modTimeStr = strconv.FormatInt(modTime.Unix(), 10)
+		}
 		opts := rest.Opts{
 			Method:     "PROPPATCH",
 			Path:       o.filePath(),
 			NoRedirect: true,
-			Body:       strings.NewReader(fmt.Sprintf(owncloudPropset, modTime.Unix())),
+			Body:       strings.NewReader(fmt.Sprintf(mtimePropset, o.fs.propNameMtime, modTimeStr, o.fs.propNameMtime)),
 		}
 		var result api.Multistatus
 		var resp *http.Response
-- 
2.41.0

From 84d2bbc2e2eb15f4ef3558aec46adf33d3b443c3 Mon Sep 17 00:00:00 2001
From: Jan Palus <jpalus@fastmail.com>
Date: Mon, 15 May 2023 19:20:32 +0200
Subject: [PATCH 2/2] webdav: fastmail: support for update_modtime config opt

for compatibility with:
https://github.com/rclone/rclone/pull/6108
---
 backend/webdav/webdav.go | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/backend/webdav/webdav.go b/backend/webdav/webdav.go
index c91e4950c..a8c7ffce8 100644
--- a/backend/webdav/webdav.go
+++ b/backend/webdav/webdav.go
@@ -146,6 +146,14 @@ Set to 0 to disable chunked uploading.
 			Help:     "Exclude ownCloud shares",
 			Advanced: true,
 			Default:  false,
+		}, {
+			Name: "update_modtime",
+			Help: `Adjust modification time on servers which allow DAV:getlastmodified property update.
+
+Use provider's default if unset.
+`,
+			Default:  fs.Tristate{},
+			Advanced: true,
 		}},
 	})
 }
@@ -162,6 +170,7 @@ type Options struct {
 	PacerMinSleep      fs.Duration          `config:"pacer_min_sleep"`
 	ChunkSize          fs.SizeSuffix        `config:"nextcloud_chunk_size"`
 	ExcludeShares      bool                 `config:"owncloud_exclude_shares"`
+	UpdateModTime      fs.Tristate          `config:"update_modtime"`
 }
 
 // Fs represents a remote webdav
@@ -582,8 +591,10 @@ func (f *Fs) setQuirks(ctx context.Context, vendor string) error {
 		f.canStream = true
 		f.precision = time.Second
 		f.useOCMtime = true
-		f.propsetMtime = true
-		f.propNameMtime = "getlastmodified"
+		if !f.opt.UpdateModTime.Valid || f.opt.UpdateModTime.Valid && f.opt.UpdateModTime.Value {
+			f.propsetMtime = true
+			f.propNameMtime = "getlastmodified"
+		}
 		f.hasMESHA1 = true
 	case "owncloud":
 		f.canStream = true
-- 
2.41.0