syncthing-event-api - Man Page

Event API

Description

Syncthing provides a simple long polling interface for exposing events from the core utility towards a GUI. To receive events, see /rest/events-get.

Event Structure

Each event is represented by an object similar to the following:

{
    "id": 2,
    "globalID": 3,
    "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"
    }
}

The top level keys id, globalID, time, type and data are always present, though data may be null.

id

A unique ID for this event on the events API. It always increases by 1: the first event generated has id 1, the next has id 2 etc. If this increases by more than 1, then one or more events have been skipped by the events API.

globalID

A global ID for this event, across the events API, the audit log, and any other sources. It may increase by more than 1, but it will always be greater than or equal to the id.

time

The time the event was generated.

type

Indicates the type of (i.e. reason for) the event and is one of the event types below.

data

An object containing optional extra information; the exact structure is determined by the event type.

Event Types

ClusterConfigReceived

New 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"
    }
}

ConfigSaved

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": {"..."}
    }
}

DeviceConnected

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)"
    }
}

DeviceDisconnected

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.

DeviceDiscovered

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"
    }
}

DevicePaused

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"
    }
}

DeviceRejected (DEPRECATED)

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"
    }
}

DeviceResumed

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"
    }
}

DownloadProgress

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.

Failure

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"
}

FolderCompletion

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.

New 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
    }
}

FolderErrors

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"
    }
}

New in version 0.11.12.

SEE ALSO:

The statechanged event.

FolderPaused

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"
  }
}

FolderRejected (DEPRECATED)

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"
    }
}

FolderResumed

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"
  }
}

FolderScanProgress

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
}

FolderSummary

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

{
    "id": 16,
    "globalID": 16,
    "type": "FolderSummary",
    "time": "2015-04-17T14:12:20.460121585+09:00",
    "data": {
        "folder": "default",
        "summary": {
            "globalBytes": 0,
            "globalDeleted": 0,
            "globalFiles": 0,
            "ignorePatterns": false,
            "inSyncBytes": 0,
            "inSyncFiles": 0,
            "invalid": "",
            "localBytes": 0,
            "localDeleted": 0,
            "localFiles": 0,
            "needBytes": 0,
            "needFiles": 0,
            "state": "idle",
            "stateChanged": "2015-04-17T14:12:12.455224687+09:00",
            "version": 0
        }
    }
}

FolderWatchStateChanged

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."
  }
}

ItemFinished

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.

New in version 0.11.10: The metadata action.

ItemStarted

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.

New in version 0.11.10: The metadata action.

ListenAddressesChanged

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
         }
      ]
   }
}

LocalChangeDetected

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:

This event is not included in /rest/events-get endpoint without a mask specified, but needs to be selected explicitly.

{
  "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": "C:\\Users\\Nate\\Sync\\testfolder\\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.

LocalIndexUpdated

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.

LoginAttempt

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
}

PendingDevicesChanged

New 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"
      }
    ]
  }
}

PendingFoldersChanged

New 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"
      }
    ]
  }
}

RemoteChangeDetected

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

NOTE:

This event is not included in /rest/events-get endpoint without a mask specified, but needs to be selected explicitly.

{
   "time" : "2017-03-06T23:58:21.844739891+01:00",
   "globalID" : 123,
   "data" : {
      "type" : "file",
      "action" : "deleted",
      "folder": "Dokumente",
      "folderID" : "Dokumente",
      "path" : "/media/ntfs_data/Dokumente/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.

RemoteDownloadProgress

This event is emitted when a download-progress 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
}

RemoteIndexUpdated

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
    }
}

Starting

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"
    }
}

StartupComplete

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
}

StateChanged

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"
    }
}

Author

The Syncthing Authors

Info

Aug 14, 2022 v1.20.4 Syncthing