1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
GoToSocial
Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package streaming
import (
"fmt"
"net/http"
"time"
"codeberg.org/gruf/go-kv"
apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/gin-gonic/gin"
"github.com/gorilla/websocket"
)
var (
wsUpgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
// we expect cors requests (via eg., pinafore.social) so be lenient
CheckOrigin: func(r *http.Request) bool { return true },
}
errNoToken = fmt.Errorf("no access token provided under query key %s or under header %s", AccessTokenQueryKey, AccessTokenHeader)
)
// StreamGETHandler swagger:operation GET /api/v1/streaming streamGet
//
// Initiate a websocket connection for live streaming of statuses and notifications.
//
// The scheme used should *always* be `wss`. The streaming basepath can be viewed at `/api/v1/instance`.
//
// On a successful connection, a code `101` will be returned, which indicates that the connection is being upgraded to a secure websocket connection.
//
// As long as the connection is open, various message types will be streamed into it.
//
// GoToSocial will ping the connection every 30 seconds to check whether the client is still receiving.
//
// If the ping fails, or something else goes wrong during transmission, then the connection will be dropped, and the client will be expected to start it again.
//
// ---
// tags:
// - streaming
//
// produces:
// - application/json
//
// schemes:
// - wss
//
// parameters:
// -
// name: access_token
// type: string
// description: Access token for the requesting account.
// in: query
// required: true
// -
// name: stream
// type: string
// description: |-
// Type of stream to request.
//
// Options are:
//
// `user`: receive updates for the account's home timeline.
// `public`: receive updates for the public timeline.
// `public:local`: receive updates for the local timeline.
// `hashtag`: receive updates for a given hashtag.
// `hashtag:local`: receive local updates for a given hashtag.
// `list`: receive updates for a certain list of accounts.
// `direct`: receive updates for direct messages.
// in: query
// required: true
//
// security:
// - OAuth2 Bearer:
// - read:streaming
//
// responses:
// '101':
// schema:
// type: object
// properties:
// stream:
// type: array
// items:
// type: string
// enum:
// - user
// - public
// - public:local
// - hashtag
// - hashtag:local
// - list
// - direct
// event:
// description: |-
// The type of event being received.
//
// `update`: a new status has been received.
// `notification`: a new notification has been received.
// `delete`: a status has been deleted.
// `filters_changed`: not implemented.
// type: string
// enum:
// - update
// - notification
// - delete
// - filters_changed
// payload:
// description: |-
// The payload of the streamed message.
// Different depending on the `event` type.
//
// If present, it should be parsed as a string.
//
// If `event` = `update`, then the payload will be a JSON string of a status.
// If `event` = `notification`, then the payload will be a JSON string of a notification.
// If `event` = `delete`, then the payload will be a status ID.
// type: string
// example: "{\"id\":\"01FC3TZ5CFG6H65GCKCJRKA669\",\"created_at\":\"2021-08-02T16:25:52Z\",\"sensitive\":false,\"spoiler_text\":\"\",\"visibility\":\"public\",\"language\":\"en\",\"uri\":\"https://gts.superseriousbusiness.org/users/dumpsterqueer/statuses/01FC3TZ5CFG6H65GCKCJRKA669\",\"url\":\"https://gts.superseriousbusiness.org/@dumpsterqueer/statuses/01FC3TZ5CFG6H65GCKCJRKA669\",\"replies_count\":0,\"reblogs_count\":0,\"favourites_count\":0,\"favourited\":false,\"reblogged\":false,\"muted\":false,\"bookmarked\":fals…//gts.superseriousbusiness.org/fileserver/01JNN207W98SGG3CBJ76R5MVDN/header/original/019036W043D8FXPJKSKCX7G965.png\",\"header_static\":\"https://gts.superseriousbusiness.org/fileserver/01JNN207W98SGG3CBJ76R5MVDN/header/small/019036W043D8FXPJKSKCX7G965.png\",\"followers_count\":33,\"following_count\":28,\"statuses_count\":126,\"last_status_at\":\"2021-08-02T16:25:52Z\",\"emojis\":[],\"fields\":[]},\"media_attachments\":[],\"mentions\":[],\"tags\":[],\"emojis\":[],\"card\":null,\"poll\":null,\"text\":\"a\"}"
// '401':
// description: unauthorized
// '400':
// description: bad request
func (m *Module) StreamGETHandler(c *gin.Context) {
streamType := c.Query(StreamQueryKey)
if streamType == "" {
err := fmt.Errorf("no stream type provided under query key %s", StreamQueryKey)
apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
return
}
var accessToken string
if t := c.Query(AccessTokenQueryKey); t != "" {
// try query param first
accessToken = t
} else if t := c.GetHeader(AccessTokenHeader); t != "" {
// fall back to Sec-Websocket-Protocol
accessToken = t
} else {
// no token
err := errNoToken
apiutil.ErrorHandler(c, gtserror.NewErrorUnauthorized(err, err.Error()), m.processor.InstanceGet)
return
}
account, errWithCode := m.processor.AuthorizeStreamingRequest(c.Request.Context(), accessToken)
if errWithCode != nil {
apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
return
}
stream, errWithCode := m.processor.OpenStreamForAccount(c.Request.Context(), account, streamType)
if errWithCode != nil {
apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
return
}
l := log.WithFields(kv.Fields{
{"account", account.Username},
{"path", BasePath},
{"streamID", stream.ID},
{"streamType", streamType},
}...)
wsConn, err := wsUpgrader.Upgrade(c.Writer, c.Request, nil)
if err != nil {
// If the upgrade fails, then Upgrade replies to the client with an HTTP error response.
// Because websocket issues are a pretty common source of headaches, we should also log
// this at Error to make this plenty visible and help admins out a bit.
l.Errorf("error upgrading websocket connection: %s", err)
close(stream.Hangup)
return
}
defer func() {
// cleanup
wsConn.Close()
close(stream.Hangup)
}()
streamTicker := time.NewTicker(m.tickDuration)
defer streamTicker.Stop()
// We want to stay in the loop as long as possible while the client is connected.
// The only thing that should break the loop is if the client leaves or the connection becomes unhealthy.
//
// If the loop does break, we expect the client to reattempt connection, so it's cheap to leave + try again
wsLoop:
for {
select {
case m := <-stream.Messages:
l.Trace("received message from stream")
if err := wsConn.WriteJSON(m); err != nil {
l.Debugf("error writing json to websocket connection; breaking off: %s", err)
break wsLoop
}
l.Trace("wrote message into websocket connection")
case <-streamTicker.C:
l.Trace("received TICK from ticker")
if err := wsConn.WriteMessage(websocket.PingMessage, []byte(": ping")); err != nil {
l.Debugf("error writing ping to websocket connection; breaking off: %s", err)
break wsLoop
}
l.Trace("wrote ping message into websocket connection")
}
}
}
|
