Clean up readme
Philipp Heckel
parent
7b810acfb5
commit
30a1ffa7cf
132
README.md
132
README.md
|
|
@ -1,47 +1,110 @@
|
|||
# ntfy
|
||||
|
||||
ntfy (pronounce: *notify*) is a super simple pub-sub notification service. It allows you to send desktop and (soon) phone notifications
|
||||
via scripts. I run a free version of it on *[ntfy.sh](https://ntfy.sh)*. **No signups or cost.**
|
||||
**ntfy** (pronounce: *notify*) is a simple HTTP-based [pub-sub]https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern) notification service.
|
||||
It allows you to send notifications to your phone or desktop via scripts from any computer, entirely without signup or cost.
|
||||
It's also open source (as you can plainly see) if you want to run your own.
|
||||
|
||||
I run a free version of it at **[ntfy.sh](https://ntfy.sh)**, and there's an [Android app](https://play.google.com/store/apps/details?id=io.heckel.ntfy)
|
||||
too.
|
||||
|
||||
## Usage
|
||||
|
||||
### Subscribe to a topic
|
||||
Topics are created on the fly by subscribing to them. You can create and subscribe to a topic either in a web UI, or in
|
||||
your own app by subscribing to an [SSE](https://en.wikipedia.org/wiki/Server-sent_events)/[EventSource](https://developer.mozilla.org/en-US/docs/Web/API/EventSource),
|
||||
or a JSON or raw feed.
|
||||
### Publishing messages
|
||||
|
||||
Because there is no sign-up, **the topic is essentially a password**, so pick something that's not easily guessable.
|
||||
Publishing messages can be done via PUT or POST using. Topics are created on the fly by subscribing or publishing to them.
|
||||
Because there is no sign-up, **the topic is essentially a password**, so pick something that's not easily guessable.
|
||||
|
||||
Here's how you can create a topic `mytopic`, subscribe to it topic and wait for events. This is using `curl`, but you
|
||||
can use any library that can do HTTP GETs:
|
||||
Here's an example showing how to publish a message using `curl`:
|
||||
|
||||
```
|
||||
# Subscribe to "mytopic" and output one message per line (\n are replaced with a space)
|
||||
curl -s ntfy.sh/mytopic/raw
|
||||
|
||||
# Subscribe to "mytopic" and output one JSON message per line
|
||||
curl -s ntfy.sh/mytopic/json
|
||||
|
||||
# Subscribe to "mytopic" and output an SSE stream (supported via JS/EventSource)
|
||||
curl -s ntfy.sh/mytopic/sse
|
||||
```
|
||||
|
||||
You can easily script it to execute any command when a message arrives. This sends desktop notifications (just like
|
||||
the web UI, but without it):
|
||||
```
|
||||
while read msg; do
|
||||
[ -n "$msg" ] && notify-send "$msg"
|
||||
done < <(stdbuf -i0 -o0 curl -s ntfy.sh/mytopic/raw)
|
||||
```
|
||||
|
||||
### Publish messages
|
||||
Publishing messages can be done via PUT or POST using. Here's an example using `curl`:
|
||||
```
|
||||
curl -d "long process is done" ntfy.sh/mytopic
|
||||
```
|
||||
|
||||
Messages published to a non-existing topic or a topic without subscribers will not be delivered later. There is (currently)
|
||||
no buffering of any kind. If you're not listening, the message won't be delivered.
|
||||
Here's an example in JS with `fetch()` (see [full example](examples)):
|
||||
|
||||
```
|
||||
fetch('https://ntfy.sh/mytopic', {
|
||||
method: 'POST', // PUT works too
|
||||
body: 'Hello from the other side.'
|
||||
})
|
||||
```
|
||||
|
||||
### Subscribe to a topic
|
||||
You can create and subscribe to a topic either in this web UI, or in your own app by subscribing to an
|
||||
[EventSource](https://developer.mozilla.org/en-US/docs/Web/API/EventSource), a JSON feed, or raw feed.
|
||||
|
||||
#### Subscribe via web
|
||||
If you subscribe to a topic via this web UI in the field below, messages published to any subscribed topic
|
||||
will show up as **desktop notification**.
|
||||
|
||||
You can try this easily on **[ntfy.sh](https://ntfy.sh)**.
|
||||
|
||||
#### Subscribe via phone
|
||||
You can use the [Ntfy Android App](https://play.google.com/store/apps/details?id=io.heckel.ntfy) to receive
|
||||
notifications directly on your phone. Just like the server, this app is also [open source](https://github.com/binwiederhier/ntfy-android).
|
||||
|
||||
#### Subscribe via your app, or via the CLI
|
||||
Using [EventSource](https://developer.mozilla.org/en-US/docs/Web/API/EventSource) in JS, you can consume
|
||||
notifications like this (see [full example](examples)):
|
||||
|
||||
```javascript
|
||||
const eventSource = new EventSource('https://ntfy.sh/mytopic/sse');<br/>
|
||||
eventSource.onmessage = (e) => {<br/>
|
||||
// Do something with e.data<br/>
|
||||
};
|
||||
```
|
||||
|
||||
You can also use the same `/sse` endpoint via `curl` or any other HTTP library:
|
||||
|
||||
```
|
||||
$ curl -s ntfy.sh/mytopic/sse
|
||||
event: open
|
||||
data: {"id":"weSj9RtNkj","time":1635528898,"event":"open","topic":"mytopic"}
|
||||
|
||||
data: {"id":"p0M5y6gcCY","time":1635528909,"event":"message","topic":"mytopic","message":"Hi!"}
|
||||
|
||||
event: keepalive
|
||||
data: {"id":"VNxNIg5fpt","time":1635528928,"event":"keepalive","topic":"test"}
|
||||
```
|
||||
|
||||
To consume JSON instead, use the `/json` endpoint, which prints one message per line:
|
||||
|
||||
```
|
||||
$ curl -s ntfy.sh/mytopic/json
|
||||
{"id":"SLiKI64DOt","time":1635528757,"event":"open","topic":"mytopic"}
|
||||
{"id":"hwQ2YpKdmg","time":1635528741,"event":"message","topic":"mytopic","message":"Hi!"}
|
||||
{"id":"DGUDShMCsc","time":1635528787,"event":"keepalive","topic":"mytopic"}
|
||||
```
|
||||
|
||||
Or use the `/raw` endpoint if you need something super simple (empty lines are keepalive messages):
|
||||
|
||||
```
|
||||
$ curl -s ntfy.sh/mytopic/raw
|
||||
|
||||
This is a notification
|
||||
```
|
||||
|
||||
#### Message buffering and polling
|
||||
Messages are buffered in memory for a few hours to account for network interruptions of subscribers.
|
||||
You can read back what you missed by using the `since=...` query parameter. It takes either a
|
||||
duration (e.g. `10m` or `30s`) or a Unix timestamp (e.g. `1635528757`):
|
||||
|
||||
```
|
||||
$ curl -s "ntfy.sh/mytopic/json?since=10m"
|
||||
# Same output as above, but includes messages from up to 10 minutes ago
|
||||
```
|
||||
|
||||
You can also just poll for messages if you don't like the long-standing connection using the `poll=1`
|
||||
query parameter. The connection will end after all available messages have been read. This parameter has to be
|
||||
combined with `since=`.
|
||||
|
||||
```
|
||||
$ curl -s "ntfy.sh/mytopic/json?poll=1&since=10m"
|
||||
# Returns messages from up to 10 minutes ago and ends the connection
|
||||
```
|
||||
|
||||
## Examples
|
||||
There are a few usage examples in the [examples](examples) directory. I'm sure there are tons of other ways to use it.
|
||||
|
||||
## Installation
|
||||
Please check out the [releases page](https://github.com/binwiederhier/ntfy/releases) for binaries and
|
||||
|
|
@ -104,7 +167,6 @@ To build releases, I use [GoReleaser](https://goreleaser.com/). If you have that
|
|||
## TODO
|
||||
- add HTTPS
|
||||
- make limits configurable
|
||||
- limit max number of subscriptions
|
||||
|
||||
## Contributing
|
||||
I welcome any and all contributions. Just create a PR or an issue.
|
||||
|
|
@ -116,4 +178,6 @@ Third party libraries and resources:
|
|||
* [github.com/urfave/cli/v2](https://github.com/urfave/cli/v2) (MIT) is used to drive the CLI
|
||||
* [Mixkit sound](https://mixkit.co/free-sound-effects/notification/) (Mixkit Free License) used as notification sound
|
||||
* [Lato Font](https://www.latofonts.com/) (OFL) is used as a font in the Web UI
|
||||
* [GoReleaser](https://goreleaser.com/) (MIT) is used to create releases
|
||||
* [GoReleaser](https://goreleaser.com/) (MIT) is used to create releases
|
||||
* [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3) (MIT) is used to provide the persistent message cache
|
||||
* [Firebase Admin SDK](https://github.com/firebase/firebase-admin-go) (Apache 2.0) is used to send FCM messages
|
||||
|
|
|
|||
16
cmd/app.go
16
cmd/app.go
|
|
@ -19,9 +19,9 @@ func New() *cli.App {
|
|||
flags := []cli.Flag{
|
||||
&cli.StringFlag{Name: "config", Aliases: []string{"c"}, EnvVars: []string{"NTFY_CONFIG_FILE"}, Value: "/etc/ntfy/config.yml", DefaultText: "/etc/ntfy/config.yml", Usage: "config file"},
|
||||
altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-http", Aliases: []string{"l"}, EnvVars: []string{"NTFY_LISTEN_HTTP"}, Value: config.DefaultListenHTTP, Usage: "ip:port used to as listen address"}),
|
||||
altsrc.NewStringFlag(&cli.StringFlag{Name: "cache-file", Aliases: []string{"C"}, EnvVars: []string{"NTFY_CACHE_FILE"}, Usage: "cache file used for message caching"}),
|
||||
altsrc.NewStringFlag(&cli.StringFlag{Name: "firebase-key-file", Aliases: []string{"F"}, EnvVars: []string{"NTFY_FIREBASE_KEY_FILE"}, Usage: "Firebase credentials file; if set additionally publish to FCM topic"}),
|
||||
altsrc.NewDurationFlag(&cli.DurationFlag{Name: "message-buffer-duration", Aliases: []string{"b"}, EnvVars: []string{"NTFY_MESSAGE_BUFFER_DURATION"}, Value: config.DefaultMessageBufferDuration, Usage: "buffer messages in memory for this time to allow `since` requests"}),
|
||||
altsrc.NewStringFlag(&cli.StringFlag{Name: "cache-file", Aliases: []string{"C"}, EnvVars: []string{"NTFY_CACHE_FILE"}, Usage: "cache file used for message caching"}),
|
||||
altsrc.NewDurationFlag(&cli.DurationFlag{Name: "cache-duration", Aliases: []string{"b"}, EnvVars: []string{"NTFY_CACHE_DURATION"}, Value: config.DefaultCacheDuration, Usage: "buffer messages for this time to allow `since` requests"}),
|
||||
altsrc.NewDurationFlag(&cli.DurationFlag{Name: "keepalive-interval", Aliases: []string{"k"}, EnvVars: []string{"NTFY_KEEPALIVE_INTERVAL"}, Value: config.DefaultKeepaliveInterval, Usage: "default interval of keepalive messages"}),
|
||||
altsrc.NewDurationFlag(&cli.DurationFlag{Name: "manager-interval", Aliases: []string{"m"}, EnvVars: []string{"NTFY_MANAGER_INTERVAL"}, Value: config.DefaultManagerInterval, Usage: "default interval of for message pruning and stats printing"}),
|
||||
}
|
||||
|
|
@ -45,9 +45,9 @@ func New() *cli.App {
|
|||
func execRun(c *cli.Context) error {
|
||||
// Read all the options
|
||||
listenHTTP := c.String("listen-http")
|
||||
cacheFile := c.String("cache-file")
|
||||
firebaseKeyFile := c.String("firebase-key-file")
|
||||
messageBufferDuration := c.Duration("message-buffer-duration")
|
||||
cacheFile := c.String("cache-file")
|
||||
cacheDuration := c.Duration("cache-duration")
|
||||
keepaliveInterval := c.Duration("keepalive-interval")
|
||||
managerInterval := c.Duration("manager-interval")
|
||||
|
||||
|
|
@ -58,15 +58,15 @@ func execRun(c *cli.Context) error {
|
|||
return errors.New("keepalive interval cannot be lower than five seconds")
|
||||
} else if managerInterval < 5*time.Second {
|
||||
return errors.New("manager interval cannot be lower than five seconds")
|
||||
} else if messageBufferDuration < managerInterval {
|
||||
return errors.New("message buffer duration cannot be lower than manager interval")
|
||||
} else if cacheDuration < managerInterval {
|
||||
return errors.New("cache duration cannot be lower than manager interval")
|
||||
}
|
||||
|
||||
// Run server
|
||||
conf := config.New(listenHTTP)
|
||||
conf.CacheFile = cacheFile
|
||||
conf.FirebaseKeyFile = firebaseKeyFile
|
||||
conf.MessageBufferDuration = messageBufferDuration
|
||||
conf.CacheFile = cacheFile
|
||||
conf.CacheDuration = cacheDuration
|
||||
conf.KeepaliveInterval = keepaliveInterval
|
||||
conf.ManagerInterval = managerInterval
|
||||
s, err := server.New(conf)
|
||||
|
|
|
|||
|
|
@ -8,10 +8,10 @@ import (
|
|||
|
||||
// Defines default config settings
|
||||
const (
|
||||
DefaultListenHTTP = ":80"
|
||||
DefaultMessageBufferDuration = 12 * time.Hour
|
||||
DefaultKeepaliveInterval = 30 * time.Second
|
||||
DefaultManagerInterval = time.Minute
|
||||
DefaultListenHTTP = ":80"
|
||||
DefaultCacheDuration = 12 * time.Hour
|
||||
DefaultKeepaliveInterval = 30 * time.Second
|
||||
DefaultManagerInterval = time.Minute
|
||||
)
|
||||
|
||||
// Defines all the limits
|
||||
|
|
@ -28,9 +28,9 @@ var (
|
|||
// Config is the main config struct for the application. Use New to instantiate a default config struct.
|
||||
type Config struct {
|
||||
ListenHTTP string
|
||||
CacheFile string
|
||||
FirebaseKeyFile string
|
||||
MessageBufferDuration time.Duration
|
||||
CacheFile string
|
||||
CacheDuration time.Duration
|
||||
KeepaliveInterval time.Duration
|
||||
ManagerInterval time.Duration
|
||||
GlobalTopicLimit int
|
||||
|
|
@ -43,9 +43,9 @@ type Config struct {
|
|||
func New(listenHTTP string) *Config {
|
||||
return &Config{
|
||||
ListenHTTP: listenHTTP,
|
||||
CacheFile: "",
|
||||
FirebaseKeyFile: "",
|
||||
MessageBufferDuration: DefaultMessageBufferDuration,
|
||||
CacheFile: "",
|
||||
CacheDuration: DefaultCacheDuration,
|
||||
KeepaliveInterval: DefaultKeepaliveInterval,
|
||||
ManagerInterval: DefaultManagerInterval,
|
||||
GlobalTopicLimit: defaultGlobalTopicLimit,
|
||||
|
|
|
|||
|
|
@ -10,10 +10,15 @@
|
|||
#
|
||||
# firebase-key-file: <filename>
|
||||
|
||||
# If set, messages are cached in a local SQLite database instead of only in-memory. This
|
||||
# allows for service restarts without losing messages in support of the since= parameter.
|
||||
#
|
||||
# cache-file: <filename>
|
||||
|
||||
# Duration for which messages will be buffered before they are deleted.
|
||||
# This is required to support the "since=..." and "poll=1" parameter.
|
||||
#
|
||||
# message-buffer-duration: 12h
|
||||
# cache-duration: 12h
|
||||
|
||||
# Interval in which keepalive messages are sent to the client. This is to prevent
|
||||
# intermediaries closing the connection for inactivity.
|
||||
|
|
|
|||
|
|
@ -7,8 +7,8 @@ import (
|
|||
)
|
||||
|
||||
type memCache struct {
|
||||
messages map[string][]*message
|
||||
mu sync.Mutex
|
||||
messages map[string][]*message
|
||||
mu sync.Mutex
|
||||
}
|
||||
|
||||
var _ cache = (*memCache)(nil)
|
||||
|
|
|
|||
|
|
@ -19,8 +19,8 @@ const (
|
|||
CREATE INDEX IF NOT EXISTS idx_topic ON messages (topic);
|
||||
COMMIT;
|
||||
`
|
||||
insertMessageQuery = `INSERT INTO messages (id, time, topic, message) VALUES (?, ?, ?, ?)`
|
||||
pruneMessagesQuery = `DELETE FROM messages WHERE time < ?`
|
||||
insertMessageQuery = `INSERT INTO messages (id, time, topic, message) VALUES (?, ?, ?, ?)`
|
||||
pruneMessagesQuery = `DELETE FROM messages WHERE time < ?`
|
||||
selectMessagesSinceTimeQuery = `
|
||||
SELECT id, time, message
|
||||
FROM messages
|
||||
|
|
@ -46,7 +46,7 @@ func newSqliteCache(filename string) (*sqliteCache, error) {
|
|||
return nil, err
|
||||
}
|
||||
return &sqliteCache{
|
||||
db: db,
|
||||
db: db,
|
||||
}, nil
|
||||
}
|
||||
|
||||
|
|
@ -122,6 +122,6 @@ func (s *sqliteCache) Topics() (map[string]*topic, error) {
|
|||
}
|
||||
|
||||
func (c *sqliteCache) Prune(keep time.Duration) error {
|
||||
_, err := c.db.Exec(pruneMessagesQuery, time.Now().Add(-1 * keep).Unix())
|
||||
_, err := c.db.Exec(pruneMessagesQuery, time.Now().Add(-1*keep).Unix())
|
||||
return err
|
||||
}
|
||||
|
|
|
|||
|
|
@ -33,7 +33,7 @@
|
|||
<h1><img src="static/img/ntfy.png" alt="ntfy"/><br/>ntfy.sh - simple HTTP-based pub-sub</h1>
|
||||
<p>
|
||||
<b>ntfy</b> (pronounce: <i>notify</i>) is a simple HTTP-based <a href="https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern">pub-sub</a> notification service.
|
||||
It allows you to send <b>desktop notifications via scripts from any computer</b>, entirely <b>without signup or cost</b>.
|
||||
It allows you to send <b>notifications to your phone or desktop via scripts from any computer</b>, entirely <b>without signup or cost</b>.
|
||||
It's also <a href="https://github.com/binwiederhier/ntfy">open source</a> if you want to run your own.
|
||||
</p>
|
||||
<p id="error"></p>
|
||||
|
|
@ -83,8 +83,8 @@
|
|||
|
||||
<h3>Subscribe via phone</h3>
|
||||
<p>
|
||||
Once it's approved, you can use the <b>Ntfy Android App</b> to receive notifications directly on your phone. Just like
|
||||
the server, this app is also <a href="https://github.com/binwiederhier/ntfy-android">open source</a>.
|
||||
You can use the <a href="https://play.google.com/store/apps/details?id=io.heckel.ntfy">Ntfy Android App</a>
|
||||
to receive notifications directly on your phone. Just like the server, this app is also <a href="https://github.com/binwiederhier/ntfy-android">open source</a>.
|
||||
</p>
|
||||
|
||||
<h3>Subscribe via your app, or via the CLI</h3>
|
||||
|
|
@ -184,7 +184,7 @@
|
|||
<h2>Privacy policy</h2>
|
||||
<p>
|
||||
Neither the server nor the app record any personal information, or share any of the messages and topics with
|
||||
any outside service. All data is exclusively used to make the service function properly. The notable exception
|
||||
any outside service. All data is exclusively used to make the service function properly. The one exception
|
||||
is the Firebase Cloud Messaging (FCM) service, which is required to provide instant Android notifications (see
|
||||
FAQ for details).
|
||||
</p>
|
||||
|
|
|
|||
|
|
@ -204,6 +204,9 @@ func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visito
|
|||
return err
|
||||
}
|
||||
w.Header().Set("Access-Control-Allow-Origin", "*") // CORS, allow cross-origin requests
|
||||
if err := json.NewEncoder(w).Encode(m); err != nil {
|
||||
return err
|
||||
}
|
||||
s.mu.Lock()
|
||||
s.messages++
|
||||
s.mu.Unlock()
|
||||
|
|
@ -360,7 +363,7 @@ func (s *Server) updateStatsAndExpire() {
|
|||
}
|
||||
|
||||
// Prune cache
|
||||
if err := s.cache.Prune(s.config.MessageBufferDuration); err != nil {
|
||||
if err := s.cache.Prune(s.config.CacheDuration); err != nil {
|
||||
log.Printf("error pruning cache: %s", err.Error())
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue