syncthing-event-api - Man Page

Added in version 1.20.0.

The ClusterConfigReceived event is emitted after processing such a protocol message received from a remote device.  It is mainly used for internal purposes.

{
    "id": 84,
    "globalID": 84,
    "type": "ClusterConfigReceived",
    "time": "2022-04-27T14:14:27.043576583+09:00",
    "data": {
        "device": "I6KAH76-66SLLLB-5PFXSOA-UFJCDZC-YAOMLEK-CP2GB32-BV5RQST-3PSROAU"
    }
}

Emitted after the config has been saved by the user or by Syncthing itself.

{
    "id": 50,
    "globalID": 50,
    "type": "ConfigSaved",
    "time": "2014-12-13T00:09:13.5166486Z",
    "data": {
        "version": 7,
        "folders": [{"..."}],
        "devices": [{"..."}],
        "gui": {"..."},
        "ldap": {"..."},
        "options": {"..."},
        "remoteIgnoredDevices": [{"..."}],
        "defaults": {"..."}
    }
}

Generated each time a connection to a device has been established.

{
    "id": 2,
    "globalID": 2,
    "type": "DeviceConnected",
    "time": "2014-07-13T21:04:33.687836696+02:00",
    "data": {
        "addr": "172.16.32.25:22000",
        "id": "NFGKEKE-7Z6RTH7-I3PRZXS-DEJF3UJ-FRWJBFO-VBBTDND-4SGNGVZ-QUQHJAG",
        "deviceName": "Laptop",
        "clientName": "syncthing",
        "clientVersion": "v0.13.4",
        "type": "TCP (Client)"
    }
}

Generated each time a connection to a device has been terminated.

{
    "id": 48,
    "globalID": 48,
    "type": "DeviceDisconnected",
    "time": "2014-07-13T21:18:52.859929215+02:00",
    "data": {
        "error": "unexpected EOF",
        "id": "NFGKEKE-7Z6RTH7-I3PRZXS-DEJF3UJ-FRWJBFO-VBBTDND-4SGNGVZ-QUQHJAG"
    }
}

NOTE:

The error key contains the cause for disconnection, which might not necessarily be an error as such. Specifically, “EOF” and “unexpected EOF” both signify TCP connection termination, either due to the other device restarting or going offline or due to a network change.

Emitted when a new device is discovered using local discovery.

{
    "id": 13,
    "globalID": 13,
    "type": "DeviceDiscovered",
    "time": "2014-07-17T13:28:05.043465207+02:00",
    "data": {
        "addrs": [
            "172.16.32.25:22000"
        ],
        "device": "NFGKEKE-7Z6RTH7-I3PRZXS-DEJF3UJ-FRWJBFO-VBBTDND-4SGNGVZ-QUQHJAG"
    }
}

Emitted when a device was paused.

{
    "id": 13,
    "globalID": 13,
    "type": "DevicePaused",
    "time": "2014-07-17T13:28:05.043465207+02:00",
    "data": {
        "device": "NFGKEKE-7Z6RTH7-I3PRZXS-DEJF3UJ-FRWJBFO-VBBTDND-4SGNGVZ-QUQHJAG"
    }
}

Deprecated since version v1.13.0: This event is still emitted for compatibility, but deprecated.  Use the replacement PendingDevicesChanged event instead.

Emitted when there is a connection from a device we are not configured to talk to.

{
    "id": 24,
    "globalID": 24,
    "type": "DeviceRejected",
    "time": "2014-08-19T10:43:00.562821045+02:00",
    "data": {
        "address": "127.0.0.1:51807",
        "name": "My dusty computer",
        "device": "EJHMPAQ-OGCVORE-ISB4IS3-SYYVJXF-TKJGLTU-66DIQPF-GJ5D2GX-GQ3OWQK"
    }
}

Generated each time a device was resumed.

{
    "id": 2,
    "globalID": 2,
    "type": "DeviceResumed",
    "time": "2014-07-13T21:04:33.687836696+02:00",
    "data": {
        "device": "NFGKEKE-7Z6RTH7-I3PRZXS-DEJF3UJ-FRWJBFO-VBBTDND-4SGNGVZ-QUQHJAG"
    }
}

Emitted during file downloads for each folder for each file. By default only a single file in a folder is handled at the same time, but custom configuration can cause multiple files to be shown.

{
    "id": 221,
    "globalID": 221,
    "type": "DownloadProgress",
    "time": "2014-12-13T00:26:12.9876937Z",
    "data": {
        "folder1": {
            "file1": {
                "total": 800,
                "pulling": 2,
                "copiedFromOrigin": 0,
                "reused": 633,
                "copiedFromElsewhere": 0,
                "pulled": 38,
                "bytesTotal": 104792064,
                "bytesDone": 87883776
            },
            "dir\\file2": {
                "total": 80,
                "pulling": 2,
                "copiedFromOrigin": 0,
                "reused": 0,
                "copiedFromElsewhere": 0,
                "pulled": 32,
                "bytesTotal": 10420224,
                "bytesDone": 4128768
            }
        },
        "folder2": {
            "file3": {
                "total": 800,
                "pulling": 2,
                "copiedFromOrigin": 0,
                "reused": 633,
                "copiedFromElsewhere": 0,
                "pulled": 38,
                "bytesTotal": 104792064,
                "bytesDone": 87883776
            },
            "dir\\file4": {
                "total": 80,
                "pulling": 2,
                "copiedFromOrigin": 0,
                "reused": 0,
                "copiedFromElsewhere": 0,
                "pulled": 32,
                "bytesTotal": 10420224,
                "bytesDone": 4128768
            }
        }
    }
}

• total - total number of blocks in the file
• pulling - number of blocks currently being downloaded
• copiedFromOrigin - number of blocks copied from the file we are about to replace
• reused - number of blocks reused from a previous temporary file
• copiedFromElsewhere - number of blocks copied from other files or potentially other folders
• pulled - number of blocks actually downloaded so far
• bytesTotal - approximate total file size
• bytesDone - approximate number of bytes already handled (already reused, copied or pulled)

Where block size is 128KB.

Files/folders appearing in the event data imply that the download has been started for that file/folder, where disappearing implies that the downloads have been finished or failed for that file/folder. There is always a last event emitted with no data, which implies all downloads have finished/failed.

Generated for specific errors that will also be sent to the usage reporting server, if enabled in the configuration.  These are usually of special interest to the developers to troubleshoot complex errors. The data field contains a textual error message.

{
  "id": 93,
  "globalID": 93,
  "type": "Failure",
  "time": "2021-06-07T21:22:03.414609034+02:00",
  "data": "index handler got paused while already paused"
}

The FolderCompletion event is emitted when the local or remote contents for a folder changes. It contains the completion percentage for a given remote device and is emitted once per currently connected remote device.

Added in version 1.20.0: Indication whether the remote device has accepted the folder (shares it with us) as well, and whether it is paused.  The remoteState field is unknown when the remote device is not connected.  Otherwise it can be either paused, notSharing, or valid if the remote is sharing back.

{
    "id": 84,
    "globalID": 84,
    "type": "FolderCompletion",
    "time": "2022-04-27T14:14:27.043576583+09:00",
    "data": {
        "completion": 100,
        "device": "I6KAH76-66SLLLB-5PFXSOA-UFJCDZC-YAOMLEK-CP2GB32-BV5RQST-3PSROAU",
        "folder": "default",
        "globalBytes": 17,
        "globalItems": 4,
        "needBytes": 0,
        "needDeletes": 0,
        "needItems": 0,
        "remoteState": "valid",
        "sequence": 12
    }
}

The FolderErrors event is emitted when a folder cannot be successfully synchronized. The event contains the ID of the affected folder and a list of errors for files or directories therein. This list of errors is obsolete once the folder changes state to syncing - if errors remain after the next synchronization attempt, a new FolderErrors event is emitted.

{
    "id": 132,
    "type": "FolderErrors",
    "time": "2015-06-26T13:39:24.697401384+02:00",
    "data": {
        "errors": [
            {
                "error": "open /Users/jb/src/github.com/syncthing/syncthing/test/s2/h2j/.syncthing.aslkjd.tmp: permission denied",
                "path": "h2j/aslkjd"
            }
        ],
        "folder": "default"
    }
}

Added in version 0.11.12.

SEE ALSO:

Generated when the configuration changes regarding the “paused” state of a folder.  Sent repeatedly for each changed folder.

{
  "id": 93,
  "globalID": 93,
  "type": "FolderPaused",
  "time": "2021-06-07T23:45:03.414609034+02:00",
  "data": {
    "id": "abcde-fghij",
    "label": "My folder"
  }
}

Deprecated since version v1.13.0: This event is still emitted for compatibility, but deprecated.  Use the replacement PendingFoldersChanged event instead.

Emitted when a device sends index information for a folder we do not have, or have but do not share with the device in question.

{
    "id": 27,
    "globalID": 27,
    "type": "FolderRejected",
    "time": "2014-08-19T10:41:06.761751399+02:00",
    "data": {
        "device": "EJHMPAQ-OGCVORE-ISB4IS3-SYYVJXF-TKJGLTU-66DIQPF-GJ5D2GX-GQ3OWQK",
        "folder": "GXWxf-3zgnU",
        "folderLabel": "My Pictures"
    }
}

Generated when the configuration changes regarding the “paused” state of a folder.  Sent repeatedly for each changed folder.

{
  "id": 93,
  "globalID": 93,
  "type": "FolderResumed",
  "time": "2021-06-07T23:45:03.414609034+02:00",
  "data": {
    "id": "abcde-fghij",
    "label": "My folder"
  }
}

Emitted in regular intervals (folder setting ProgressIntervalS, 2s by default) during scans giving the amount of bytes already scanned and to be scanned in total , as well as the current scanning rates in bytes per second.

{
   "data" : {
      "total" : 1,
      "rate" : 0,
      "current" : 0,
      "folder" : "bd7q3-zskm5"
   },
   "globalID" : 29,
   "type" : "FolderScanProgress",
   "time" : "2017-03-06T15:00:58.072004209+01:00",
   "id" : 29
}

The FolderSummary event is emitted when folder contents have changed locally. This can be used to calculate the current local completion state.

{
    "id": 16,
    "type": "FolderSummary",
    "time": "2024-01-31T08:27:30.777875+01:00",
    "data": {
        "folder": "default",
        "summary": {
            "error": "",
            "errors": 0,
            "globalBytes": 4,
            "globalDeleted": 18664,
            "globalDirectories": 0,
            "globalFiles": 1,
            "globalSymlinks": 0,
            "globalTotalItems": 18665,
            "ignorePatterns": false,
            "inSyncBytes": 4,
            "inSyncFiles": 1,
            "invalid": "",
            "localBytes": 4,
            "localDeleted": 18664,
            "localDirectories": 0,
            "localFiles": 1,
            "localSymlinks": 0,
            "localTotalItems": 18665,
            "needBytes": 0,
            "needDeletes": 0,
            "needDirectories": 0,
            "needFiles": 0,
            "needSymlinks": 0,
            "needTotalItems": 0,
            "pullErrors": 0,
            "receiveOnlyChangedBytes": 0,
            "receiveOnlyChangedDeletes": 0,
            "receiveOnlyChangedDirectories": 0,
            "receiveOnlyChangedFiles": 0,
            "receiveOnlyChangedSymlinks": 0,
            "receiveOnlyTotalItems": 0,
            "remoteSequence": {
                "MRIW7OK-NETT3M4-N6SBWME-N25O76W-YJKVXPH-FUMQJ3S-P57B74J-GBITBAC": 37329
            },
            "sequence": 37329,
            "state": "idle",
            "stateChanged": "2024-01-31T08:27:24+01:00",
            "version": 37329,
            "watchError": ""
        }
    }
}

The FolderWatchStateChanged event is emitted when a folder’s watcher routine encounters a new error, or when a previous error disappeared after retrying. The event contains the ID of the affected folder and textual error messages describing the previous (from) and the updated (to) error conditions. If there was no error in either of these, the respective field is omitted.

{
  "id": 123,
  "type": "FolderWatchStateChanged",
  "time": "2022-03-14T12:34:56.890000000+01:00",
  "data": {
    "folder": "default",
    "from": "Something bad happened.",
    "to": "Something worse happened."
  }
}

Generated when Syncthing ends synchronizing a file to a newer version. A successful operation:

{
    "id": 93,
    "globalID": 93,
    "type": "ItemFinished",
    "time": "2014-07-13T21:22:03.414609034+02:00",
    "data": {
        "item": "test.txt",
        "folder": "default",
        "error": null,
        "type": "file",
        "action": "update"
    }
}

An unsuccessful operation:

{
    "id": 44,
    "globalID": 44,
    "type": "ItemFinished",
    "time": "2015-05-27T11:21:05.711133004+02:00",
    "data": {
        "action": "update",
        "error": "open /Users/jb/src/github.com/syncthing/syncthing/test/s2/foo/.syncthing.hej.tmp: permission denied",
        "folder": "default",
        "item": "foo/hej",
        "type": "file"
    }
}

The action field is either update (contents changed), metadata (file metadata changed but not contents), or delete.

Added in version 0.11.10: The metadata action.

Generated when Syncthing begins synchronizing a file to a newer version.

{
    "id": 93,
    "globalID": 93,
    "type": "ItemStarted",
    "time": "2014-07-13T21:22:03.414609034+02:00",
    "data": {
        "item": "test.txt",
        "folder": "default",
        "type": "file",
        "action": "update"
    }
}

The action field is either update (contents changed), metadata (file metadata changed but not contents), or delete.

Added in version 0.11.10: The metadata action.

This event is emitted when a listen address changes.

{
   "type" : "ListenAddressesChanged",
   "id" : 70,
   "time" : "2017-03-06T15:01:24.88340663+01:00",
   "globalID" : 70,
   "data" : {
      "address" : {
         "Fragment" : "",
         "RawQuery" : "",
         "Scheme" : "dynamic+https",
         "Path" : "/endpoint",
         "RawPath" : "",
         "User" : null,
         "ForceQuery" : false,
         "Host" : "relays.syncthing.net",
         "Opaque" : ""
      },
      "wan" : [
         {
            "ForceQuery" : false,
            "User" : null,
            "Host" : "31.15.66.212:443",
            "Opaque" : "",
            "Path" : "/",
            "RawPath" : "",
            "RawQuery" : "id=F4HSJVO-CP2C3IL-YLQYLSU-XTYODAG-PPU4LGV-PH3MU4N-G6K56DV-IPN47A&pingInterval=1m0s&networkTimeout=2m0s&sessionLimitBps=0&globalLimitBps=0&statusAddr=:22070&providedBy=",
            "Scheme" : "relay",
            "Fragment" : ""
         }
      ],
      "lan" : [
         {
            "RawQuery" : "id=F4HSJVO-CP2C3IL-YLQYLSU-XTYODAG-PPU4LGV-PH3MU4N-G6K56DV-IPN47A&pingInterval=1m0s&networkTimeout=2m0s&sessionLimitBps=0&globalLimitBps=0&statusAddr=:22070&providedBy=",
            "Scheme" : "relay",
            "Fragment" : "",
            "RawPath" : "",
            "Path" : "/",
            "Host" : "31.15.66.212:443",
            "Opaque" : "",
            "ForceQuery" : false,
            "User" : null
         }
      ]
   }
}

Generated upon scan whenever the local disk has discovered an updated file from the previous scan.  This does not include events that are discovered and copied from other devices (RemoteChangeDetected), only files that were changed on the local filesystem.

NOTE:

{
  "id": 7,
  "globalID": 59,
  "time": "2016-09-26T22:07:10.7189141-04:00",
  "type": "LocalChangeDetected",
  "data": {
    "action": "deleted",
    "folder": "vitwy-zjxqt",
    "folderID": "vitwy-zjxqt",
    "label": "TestSync",
    "path": "test file.rtf",
    "type": "file"
  }
}

Deprecated since version v1.1.2: The folderID field is a legacy name kept only for compatibility.  Use the folder field with identical content instead.

Generated when the local index information has changed, due to synchronizing one or more items from the cluster or discovering local changes during a scan.

{
    "id": 59,
    "globalID": 59,
    "type": "LocalIndexUpdated",
    "time": "2014-07-17T13:27:28.051369434+02:00",
    "data": {
        "folder": "default",
        "items": 1000,
        "filenames": [
            "foo",
            "bar",
            "baz"
        ],
        "sequence": 12345,
        "version": 12345
    }
}

Deprecated since version v1.10.0: The version field is a legacy name kept only for compatibility.  Use the sequence field with identical content instead.

When authentication is enabled for the GUI, this event is emitted on every login attempt. If either the username or password are incorrect, success is false and in any case the given username is returned.  The included remote address concerns the immediate connecting host, which may not be the origin of the request, but e.g. a reverse proxy.

{
   "id" : 187,
   "time" : "2017-03-07T00:19:24.420386143+01:00",
   "data" : {
      "remoteAddress" : "127.0.0.1:55530",
      "username" : "somename",
      "success" : false
   },
   "type" : "LoginAttempt",
   "globalID" : 195
}

Added in version 1.14.0.

Emitted when pending devices were added / updated (connection from unknown ID) or removed (device is ignored, dismissed or added).

{
  "id": 87,
  "type": "PendingDevicesChanged",
  "time": "2020-12-22T22:24:37.578586718+01:00",
  "data": {
    "added": [
      {
        "address": "127.0.0.1:51807",
        "deviceID": "EJHMPAQ-OGCVORE-ISB4IS3-SYYVJXF-TKJGLTU-66DIQPF-GJ5D2GX-GQ3OWQK",
        "name": "My dusty computer"
      }
    ],
    "removed": [
      {
        "deviceID": "P56IOI7-MZJNU2Y-IQGDREY-DM2MGTI-MGL3BXN-PQ6W5BM-TBBZ4TJ-XZWICQ2"
      }
    ]
  }
}

Added in version 1.14.0.

Emitted when pending folders were added / updated (offered by some device, but not shared to them) or removed (folder ignored, dismissed or added or no longer offered from the remote device).  A removed entry without a deviceID attribute means that the folder is no longer pending for any device.

{
  "id": 101,
  "type": "PendingFoldersChanged",
  "time": "2020-12-22T22:36:55.66744317+01:00",
  "data": {
    "added": [
      {
        "deviceID": "EJHMPAQ-OGCVORE-ISB4IS3-SYYVJXF-TKJGLTU-66DIQPF-GJ5D2GX-GQ3OWQK",
        "folderID": "GXWxf-3zgnU",
        "folderLabel": "My Pictures"
        "receiveEncrypted": "false"
        "remoteEncrypted": "false"
      }
    ],
    "removed": [
      {
        "deviceID": "P56IOI7-MZJNU2Y-IQGDREY-DM2MGTI-MGL3BXN-PQ6W5BM-TBBZ4TJ-XZWICQ2",
        "folderID": "neyfh-sa2nu"
      },
      {
        "folderID": "abcde-fghij"
      }
    ]
  }
}

Generated upon scan whenever a file is locally updated due to a remote change. Files that are updated locally produce a LocalChangeDetected event.

NOTE:

{
   "time" : "2017-03-06T23:58:21.844739891+01:00",
   "globalID" : 123,
   "data" : {
      "type" : "file",
      "action" : "deleted",
      "folder": "Dokumente",
      "folderID" : "Dokumente",
      "path" : "testfile",
      "label" : "Dokumente",
      "modifiedBy" : "BPDFDTU"
   },
   "type" : "RemoteChangeDetected",
   "id" : 2
}

Deprecated since version v1.1.2: The folderID field is a legacy name kept only for compatibility.  Use the folder field with identical content instead.

This event is emitted when a DownloadProgress message is received. It returns a map data of filenames with a count of downloaded blocks. The files in questions are currently being downloaded on the remote device and belong to folder.

{
   "time" : "2017-03-07T00:11:37.65838955+01:00",
   "globalID" : 170,
   "data" : {
      "state" : {
         "tahr64-6.0.5.iso" : 1784
      },
      "device" : "F4HSJVO-CP2C3IL-YLQYLSU-XTYODAG-PPU4LGV-PH3MU4N-G6K56DV-IPN47A",
      "folder" : "Dokumente"
   },
   "type" : "RemoteDownloadProgress",
   "id" : 163
}

Generated each time new index information is received from a device.

{
    "id": 44,
    "globalID": 44,
    "type": "RemoteIndexUpdated",
    "time": "2014-07-13T21:04:35.394184435+02:00",
    "data": {
        "device": "NFGKEKE-7Z6RTH7-I3PRZXS-DEJF3UJ-FRWJBFO-VBBTDND-4SGNGVZ-QUQHJAG",
        "folder": "lightroom",
        "items": 1000
    }
}

Emitted exactly once, when Syncthing starts, before parsing configuration etc.

{
    "id": 1,
    "globalID": 1,
    "type": "Starting",
    "time": "2014-07-17T13:13:32.044470055+02:00",
    "data": {
        "home": "/home/jb/.config/syncthing"
    }
}

Emitted exactly once, when initialization is complete and Syncthing is ready to start exchanging data with other devices.

{
    "id": 1,
    "globalID": 1,
    "type": "StartupComplete",
    "time": "2014-07-13T21:03:18.383239179+02:00",
    "data": null
}

Emitted when a folder changes state. Possible states are idle, scanning, syncing and error. The field duration is the number of seconds the folder spent in state from. In the example below, the folder default was in state scanning for 0.198 seconds and is now in state idle.

{
    "id": 8,
    "globalID": 8,
    "type": "StateChanged",
    "time": "2014-07-17T13:14:28.697493016+02:00",
    "data": {
        "folder": "default",
        "from": "scanning",
        "duration": 0.19782869900000002,
        "to": "idle"
    }
}