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.TH "SYNCTHING-EVENT-API" "7" "August 13, 2015" "v0.11" "Syncthing"
.SH NAME
syncthing-event-api \- Event API
.
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.SH DESCRIPTION
.sp
Syncthing provides a simple long polling interface for exposing events from the
core utility towards a GUI.
.sp
To receive events, perform a HTTP GET of \fB/rest/events?since=<lastSeenID>\fP,
where \fB<lastSeenID>\fP is the ID of the last event you\(aqve already seen or zero.
Syncthing returns a JSON encoded array of event objects, starting at the event
just after the one with the last seen ID. There is a limit to the number of
events buffered, so if the rate of events is high or the time between polling
calls is long some events might be missed. This can be detected by noting a
discontinuity in the event IDs.
.sp
If no new events are produced since \fB<lastSeenID>\fP, the HTTP call blocks and
waits for new events to happen before returning, or if no new events are
produced within 60 seconds, times out.
.sp
To receive only a limited number of events, add the \fBlimit=n\fP parameter with a
suitable value for \fBn\fP and only the \fIlast\fP \fBn\fP events will be returned. This
can be used to catch up with the latest event ID after a disconnection for
example: \fB/rest/events?since=0&limit=1\fP\&.
.SH EVENT STRUCTURE
.sp
Each event is represented by an object similar to the following:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 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"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
The top level keys \fBid\fP, \fBtime\fP, \fBtype\fP and \fBdata\fP are always present,
though \fBdata\fP may be \fBnull\fP\&.
.INDENT 0.0
.TP
.B id
A monotonically increasing integer. The first event generated has id \fB1\fP,
the next has id \fB2\fP etc.
.TP
.B time
The time the event was generated.
.TP
.B type
Indicates the type of (i.e. reason for) the event and is one of the event
types below.
.TP
.B data
An object containing optional extra information; the exact structure is
determined by the event type.
.UNINDENT
.SH EVENTS
.SS ConfigSaved
.sp
Emitted after the config has been saved by the user or by Syncthing
itself.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 50,
    "type": "ConfigSaved",
    "time": "2014\-12\-13T00:09:13.5166486Z",
    "data":{
        "Version": 7,
        "Options": { ... },
        "GUI": { ... },
        "Devices": [ ... ],
        "Folders": [ ... ]
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS DeviceConnected
.sp
Generated each time a connection to a device has been established.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 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"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS DeviceDisconnected
.sp
Generated each time a connection to a device has been terminated.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 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"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
\fBNOTE:\fP
.INDENT 0.0
.INDENT 3.5
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.
.UNINDENT
.UNINDENT
.SS DeviceDiscovered
.sp
Emitted when a new device is discovered using local discovery.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 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"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS DeviceRejected
.sp
Emitted when there is a connection from a device we are not configured
to talk to.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 24,
    "type": "DeviceRejected",
    "time": "2014\-08\-19T10:43:00.562821045+02:00",
    "data": {
        "address": "127.0.0.1:51807",
        "device": "EJHMPAQ\-OGCVORE\-ISB4IS3\-SYYVJXF\-TKJGLTU\-66DIQPF\-GJ5D2GX\-GQ3OWQK"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS DownloadProgress
.sp
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.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 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\e\efile2": {
                "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\e\efile4": {
                "Total": 80,
                "Pulling": 2,
                "CopiedFromOrigin": 0,
                "Reused": 0,
                "CopiedFromElsewhere": 0,
                "Pulled": 32,
                "BytesTotal": 10420224,
                "BytesDone": 4128768
            }
        }
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.INDENT 0.0
.IP \(bu 2
\fBTotal\fP \- total number of blocks in the file
.IP \(bu 2
\fBPulling\fP \- number of blocks currently being downloaded
.IP \(bu 2
\fBCopiedFromOrigin\fP \- number of blocks copied from the file we are
about to replace
.IP \(bu 2
\fBReused\fP \- number of blocks reused from a previous temporary file
.IP \(bu 2
\fBCopiedFromElsewhere\fP \- number of blocks copied from other files or
potentially other folders
.IP \(bu 2
\fBPulled\fP \- number of blocks actually downloaded so far
.IP \(bu 2
\fBBytesTotal\fP \- approximate total file size
.IP \(bu 2
\fBBytesDone\fP \- approximate number of bytes already handled (already
reused, copied or pulled)
.UNINDENT
.sp
Where block size is 128KB.
.sp
Files/folders appearing in the event data imply that the download has
been started for that file/folder, where disappearing implies that the
downloads has been finished or failed for that file/folder. There is
always a last event emitted with no data, which implies all downloads
being finished/failed.
.SS FolderCompletion
.sp
The \fBFolderCompletion\fP 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.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 84,
    "type": "FolderCompletion",
    "time": "2015\-04\-17T14:14:27.043576583+09:00",
    "data": {
        "completion": 100,
        "device": "I6KAH76\-66SLLLB\-5PFXSOA\-UFJCDZC\-YAOMLEK\-CP2GB32\-BV5RQST\-3PSROAU",
        "folder": "default"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS FolderErrors
.sp
The \fBFolderErrors\fP 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 \fBsyncing\fP \- if errors remain after the next
synchronization attempt, a new \fBFolderErrors\fP event is emitted.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "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"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
New in version 0.11.12.

.sp
\fBSEE ALSO:\fP
.INDENT 0.0
.INDENT 3.5
The statechanged event.
.UNINDENT
.UNINDENT
.SS FolderRejected
.sp
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.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 27,
    "type": "FolderRejected",
    "time": "2014\-08\-19T10:41:06.761751399+02:00",
    "data": {
        "device": "EJHMPAQ\-OGCVORE\-ISB4IS3\-SYYVJXF\-TKJGLTU\-66DIQPF\-GJ5D2GX\-GQ3OWQK",
        "folder": "unique"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS FolderSummary
.sp
The FolderSummary event is emitted when folder contents have changed
locally. This can be used to calculate the current local completion
state.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 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
        }
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS ItemFinished
.sp
Generated when Syncthing ends synchronizing a file to a newer version. A
successful operation:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 93,
    "type": "ItemFinished",
    "time": "2014\-07\-13T21:22:03.414609034+02:00",
    "data": {
        "item": "test.txt",
        "folder": "default",
        "error": null,
        "type": "file",
        "action": "update"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
An unsuccessful operation:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 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"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
The \fBaction\fP field is either \fBupdate\fP (contents changed), \fBmetadata\fP (file metadata changed but not contents), or \fBdelete\fP\&.
.sp
New in version 0.11.10: The \fBmetadata\fP action.

.SS ItemStarted
.sp
Generated when Syncthing begins synchronizing a file to a newer version.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 93,
    "type": "ItemStarted",
    "time": "2014\-07\-13T21:22:03.414609034+02:00",
    "data": {
        "item": "test.txt",
        "folder": "default",
        "type": "file",
        "action": "update"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
The \fBaction\fP field is either \fBupdate\fP (contents changed), \fBmetadata\fP (file metadata changed but not contents), or \fBdelete\fP\&.
.sp
New in version 0.11.10: The \fBmetadata\fP action.

.SS LocalIndexUpdated
.sp
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.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 59,
    "type": "LocalIndexUpdated",
    "time": "2014\-07\-17T13:27:28.051369434+02:00",
    "data": {
        "folder": "default",
        "items": 1000,
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS Ping
.sp
The Ping event is generated automatically every 60 seconds. This means
that even in the absence of any other activity, the event polling HTTP
request will return within a minute.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 46,
    "type": "Ping",
    "time": "2014\-07\-13T21:13:18.502171586+02:00",
    "data": null
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS RemoteIndexUpdated
.sp
Generated each time new index information is received from a device.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 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
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS Starting
.sp
Emitted exactly once, when Syncthing starts, before parsing
configuration etc.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 1,
    "type": "Starting",
    "time": "2014\-07\-17T13:13:32.044470055+02:00",
    "data": {
        "home": "/home/jb/.config/syncthing"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS StartupCompleted
.sp
Emitted exactly once, when initialization is complete and Syncthing is
ready to start exchanging data with other devices.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 1,
    "type": "StartupComplete",
    "time": "2014\-07\-13T21:03:18.383239179+02:00",
    "data": null
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SS StateChanged
.sp
Emitted when a folder changes state. Possible states are \fBidle\fP,
\fBscanning\fP, \fBcleaning\fP and \fBsyncing\fP\&. The field \fBduration\fP is
the number of seconds the folder spent in state \fBfrom\fP\&. In the example
below, the folder \fBdefault\fP was in state \fBscanning\fP for 0.198
seconds and is now in state \fBidle\fP\&.
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
{
    "id": 8,
    "type": "StateChanged",
    "time": "2014\-07\-17T13:14:28.697493016+02:00",
    "data": {
        "folder": "default",
        "from": "scanning",
        "duration": 0.19782869900000002,
        "to": "idle"
    }
}
.ft P
.fi
.UNINDENT
.UNINDENT
.SH AUTHOR
The Syncthing Authors
.SH COPYRIGHT
2015, The Syncthing Authors
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