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22 Commits

Author SHA1 Message Date
Philipp C. Heckel
3b5235ed01 Update README.md 2021-11-03 11:38:46 -04:00
Philipp C. Heckel
54366d105f Update README.md 2021-11-03 11:36:09 -04:00
Philipp C. Heckel
5356580fc6 Update README.md 2021-11-03 11:35:53 -04:00
Philipp C. Heckel
6ccadb09dd Update README.md 2021-11-03 11:35:39 -04:00
Philipp Heckel
ecde123f1c readme 2021-11-03 11:34:12 -04:00
Philipp Heckel
56ffa551f3 Merge branch 'main' of github.com:binwiederhier/ntfy into main 2021-11-03 11:33:47 -04:00
Philipp Heckel
30a1ffa7cf Clean up readme 2021-11-03 11:33:34 -04:00
Philipp C. Heckel
17839e634c Update example_desktop_notifications.sh 2021-11-02 21:15:21 -04:00
Philipp Heckel
7b810acfb5 SQLite cache 2021-11-02 21:09:49 -04:00
Philipp Heckel
1c7695c1f3 Merge branch 'main' into cache 2021-11-02 14:24:49 -04:00
Philipp Heckel
0e9fa1c4dc Fix raw endpoint 2021-11-02 14:10:56 -04:00
Philipp Heckel
67922b0ae5 Cache 2021-11-02 14:08:21 -04:00
Philipp Heckel
b775e6dfce Limits 2021-11-01 16:39:40 -04:00
Philipp Heckel
fa7a45902f Subscription limit 2021-11-01 15:21:38 -04:00
Philipp Heckel
5f2bb4f876 Readme 2021-10-30 23:46:50 -04:00
Philipp Heckel
91541f9c69 Add logo and color 2021-10-30 23:46:08 -04:00
Philipp Heckel
9a91312392 Only send Firebase data messages 2021-10-29 15:47:46 -04:00
Philipp Heckel
4b455e0fd8 Config file 2021-10-29 14:03:41 -04:00
Philipp Heckel
b145e693a5 Add firebase support 2021-10-29 13:58:14 -04:00
Philipp Heckel
4677e724ee Re-add "message" as event type 2021-10-29 08:29:27 -04:00
Philipp Heckel
ad17be1683 WIP: Firebase support 2021-10-28 23:50:38 -04:00
Philipp Heckel
28fb63b9ae readme 2021-10-27 14:58:38 -04:00
20 changed files with 1540 additions and 235 deletions

146
README.md
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@@ -1,47 +1,112 @@
# ntfy
![ntfy](server/static/img/ntfy.png)
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 - simple HTTP-based pub-sub
**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
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
@@ -64,13 +129,13 @@ sudo apt install ntfy
**Debian/Ubuntu** (*manual install*)**:**
```bash
sudo apt install tmux
wget https://github.com/binwiederhier/ntfy/releases/download/v0.0.4/ntfy_0.0.4_amd64.deb
dpkg -i ntfy_0.0.4_amd64.deb
wget https://github.com/binwiederhier/ntfy/releases/download/v1.2.0/ntfy_1.2.0_amd64.deb
dpkg -i ntfy_1.2.0_amd64.deb
```
**Fedora/RHEL/CentOS:**
```bash
rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v0.0.4/ntfy_0.0.4_amd64.rpm
rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.2.0/ntfy_1.2.0_amd64.rpm
```
**Docker:**
@@ -85,8 +150,8 @@ go get -u heckel.io/ntfy
**Manual install** (*any x86_64-based Linux*)**:**
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v0.0.4/ntfy_0.0.4_linux_x86_64.tar.gz
sudo tar -C /usr/bin -zxf ntfy_0.0.4_linux_x86_64.tar.gz ntfy
wget https://github.com/binwiederhier/ntfy/releases/download/v1.2.0/ntfy_1.2.0_linux_x86_64.tar.gz
sudo tar -C /usr/bin -zxf ntfy_1.2.0_linux_x86_64.tar.gz ntfy
./ntfy
```
@@ -104,7 +169,6 @@ 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 +180,6 @@ 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

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@@ -2,13 +2,16 @@
package cmd
import (
"errors"
"fmt"
"github.com/urfave/cli/v2"
"github.com/urfave/cli/v2/altsrc"
"heckel.io/ntfy/config"
"heckel.io/ntfy/server"
"heckel.io/ntfy/util"
"log"
"os"
"time"
)
// New creates a new CLI application
@@ -16,7 +19,11 @@ 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: "firebase-key-file", Aliases: []string{"F"}, EnvVars: []string{"NTFY_FIREBASE_KEY_FILE"}, Usage: "Firebase credentials file; if set additionally publish to FCM topic"}),
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"}),
}
return &cli.App{
Name: "ntfy",
@@ -38,16 +45,37 @@ func New() *cli.App {
func execRun(c *cli.Context) error {
// Read all the options
listenHTTP := c.String("listen-http")
firebaseKeyFile := c.String("firebase-key-file")
cacheFile := c.String("cache-file")
cacheDuration := c.Duration("cache-duration")
keepaliveInterval := c.Duration("keepalive-interval")
managerInterval := c.Duration("manager-interval")
// Run main bot, can be killed by signal
// Check values
if firebaseKeyFile != "" && !util.FileExists(firebaseKeyFile) {
return errors.New("if set, FCM key file must exist")
} else if keepaliveInterval < 5*time.Second {
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 cacheDuration < managerInterval {
return errors.New("cache duration cannot be lower than manager interval")
}
// Run server
conf := config.New(listenHTTP)
conf.FirebaseKeyFile = firebaseKeyFile
conf.CacheFile = cacheFile
conf.CacheDuration = cacheDuration
conf.KeepaliveInterval = keepaliveInterval
s := server.New(conf)
conf.ManagerInterval = managerInterval
s, err := server.New(conf)
if err != nil {
log.Fatalln(err)
}
if err := s.Run(); err != nil {
log.Fatalln(err)
}
log.Printf("Exiting.")
return nil
}
@@ -57,9 +85,9 @@ func execRun(c *cli.Context) error {
func initConfigFileInputSource(configFlag string, flags []cli.Flag) cli.BeforeFunc {
return func(context *cli.Context) error {
configFile := context.String(configFlag)
if context.IsSet(configFlag) && !fileExists(configFile) {
if context.IsSet(configFlag) && !util.FileExists(configFile) {
return fmt.Errorf("config file %s does not exist", configFile)
} else if !context.IsSet(configFlag) && !fileExists(configFile) {
} else if !context.IsSet(configFlag) && !util.FileExists(configFile) {
return nil
}
inputSource, err := altsrc.NewYamlSourceFromFile(configFile)
@@ -69,8 +97,3 @@ func initConfigFileInputSource(configFlag string, flags []cli.Flag) cli.BeforeFu
return altsrc.ApplyInputSourceValues(context, inputSource, flags)
}
}
func fileExists(filename string) bool {
stat, _ := os.Stat(filename)
return stat != nil
}

View File

@@ -9,33 +9,48 @@ import (
// Defines default config settings
const (
DefaultListenHTTP = ":80"
DefaultCacheDuration = 12 * time.Hour
DefaultKeepaliveInterval = 30 * time.Second
defaultManagerInterval = time.Minute
DefaultManagerInterval = time.Minute
)
// Defines the max number of requests, here:
// 50 requests bucket, replenished at a rate of 1 per second
// Defines all the limits
// - request limit: max number of PUT/GET/.. requests (here: 50 requests bucket, replenished at a rate of 1 per second)
// - global topic limit: max number of topics overall
// - subscription limit: max number of subscriptions (active HTTP connections) per per-visitor/IP
var (
defaultLimit = rate.Every(time.Second)
defaultLimitBurst = 50
defaultGlobalTopicLimit = 5000
defaultVisitorRequestLimit = rate.Every(time.Second)
defaultVisitorRequestLimitBurst = 50
defaultVisitorSubscriptionLimit = 30
)
// Config is the main config struct for the application. Use New to instantiate a default config struct.
type Config struct {
ListenHTTP string
Limit rate.Limit
LimitBurst int
KeepaliveInterval time.Duration
ManagerInterval time.Duration
ListenHTTP string
FirebaseKeyFile string
CacheFile string
CacheDuration time.Duration
KeepaliveInterval time.Duration
ManagerInterval time.Duration
GlobalTopicLimit int
VisitorRequestLimit rate.Limit
VisitorRequestLimitBurst int
VisitorSubscriptionLimit int
}
// New instantiates a default new config
func New(listenHTTP string) *Config {
return &Config{
ListenHTTP: listenHTTP,
Limit: defaultLimit,
LimitBurst: defaultLimitBurst,
KeepaliveInterval: DefaultKeepaliveInterval,
ManagerInterval: defaultManagerInterval,
ListenHTTP: listenHTTP,
FirebaseKeyFile: "",
CacheFile: "",
CacheDuration: DefaultCacheDuration,
KeepaliveInterval: DefaultKeepaliveInterval,
ManagerInterval: DefaultManagerInterval,
GlobalTopicLimit: defaultGlobalTopicLimit,
VisitorRequestLimit: defaultVisitorRequestLimit,
VisitorRequestLimitBurst: defaultVisitorRequestLimitBurst,
VisitorSubscriptionLimit: defaultVisitorSubscriptionLimit,
}
}

View File

@@ -1,9 +1,30 @@
# ntfy config file
# Listen address for the HTTP web server
#
# Format: <hostname>:<port>
# Default: :80
# Required: No
# Format: <hostname>:<port>
#
# listen-http: ":80"
# If set, also publish messages to a Firebase Cloud Messaging (FCM) topic for your app.
# This is optional and only required to support Android apps (which don't allow background services anymore).
#
# 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.
#
# cache-duration: 12h
# Interval in which keepalive messages are sent to the client. This is to prevent
# intermediaries closing the connection for inactivity.
#
# keepalive-interval: 30s
# Interval in which the manager prunes old messages, deletes topics and prints the stats.
#
# manager-interval: 1m

View File

@@ -3,5 +3,5 @@
# a simple script. The notify-send command sends any arriving message as a desktop notification.
while read msg; do
notify-send "$msg"
[ -n "$msg" ] && notify-send "$msg"
done < <(stdbuf -i0 -o0 curl -s ntfy.sh/mytopic/raw)

33
go.mod
View File

@@ -1,11 +1,42 @@
module heckel.io/ntfy
go 1.16
go 1.17
require (
cloud.google.com/go/firestore v1.6.1 // indirect
cloud.google.com/go/storage v1.18.2 // indirect
firebase.google.com/go v3.13.0+incompatible
github.com/BurntSushi/toml v0.4.1 // indirect
github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
github.com/mattn/go-sqlite3 v1.14.9
github.com/urfave/cli/v2 v2.3.0
golang.org/x/oauth2 v0.0.0-20211028175245-ba495a64dcb5 // indirect
golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac
google.golang.org/api v0.60.0
gopkg.in/yaml.v2 v2.4.0 // indirect
)
require (
cloud.google.com/go v0.97.0 // indirect
github.com/census-instrumentation/opencensus-proto v0.3.0 // indirect
github.com/cespare/xxhash v1.1.0 // indirect
github.com/cespare/xxhash/v2 v2.1.2 // indirect
github.com/cncf/udpa/go v0.0.0-20210930031921-04548b0d99d4 // indirect
github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1 // indirect
github.com/envoyproxy/go-control-plane v0.10.0 // indirect
github.com/envoyproxy/protoc-gen-validate v0.6.2 // indirect
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
github.com/golang/protobuf v1.5.2 // indirect
github.com/google/go-cmp v0.5.6 // indirect
github.com/googleapis/gax-go/v2 v2.1.1 // indirect
github.com/russross/blackfriday/v2 v2.1.0 // indirect
go.opencensus.io v0.23.0 // indirect
golang.org/x/net v0.0.0-20210813160813-60bc85c4be6d // indirect
golang.org/x/sys v0.0.0-20211025201205-69cdffdb9359 // indirect
golang.org/x/text v0.3.7 // indirect
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
google.golang.org/appengine v1.6.7 // indirect
google.golang.org/genproto v0.0.0-20211101144312-62acf1d99145 // indirect
google.golang.org/grpc v1.41.0 // indirect
google.golang.org/protobuf v1.27.1 // indirect
)

623
go.sum
View File

@@ -1,20 +1,641 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg=
cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8=
cloud.google.com/go v0.81.0/go.mod h1:mk/AM35KwGk/Nm2YSeZbxXdrNK3KZOYHmLkOqC2V6E0=
cloud.google.com/go v0.83.0/go.mod h1:Z7MJUsANfY0pYPdw0lbnivPx4/vhy/e2FEkSkF7vAVY=
cloud.google.com/go v0.84.0/go.mod h1:RazrYuxIK6Kb7YrzzhPoLmCVzl7Sup4NrbKPg8KHSUM=
cloud.google.com/go v0.87.0/go.mod h1:TpDYlFy7vuLzZMMZ+B6iRiELaY7z/gJPaqbMx6mlWcY=
cloud.google.com/go v0.90.0/go.mod h1:kRX0mNRHe0e2rC6oNakvwQqzyDmg57xJ+SZU1eT2aDQ=
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github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
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github.com/pkg/sftp v1.10.1/go.mod h1:lYOWFsE0bwd1+KfKJaKeuokY15vzFx25BLbzYYoAxZI=
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github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
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github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
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github.com/spf13/afero v1.6.0/go.mod h1:Ai8FlHk4v/PARR026UzYexafAt9roJ7LcLMAmO6Z93I=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/urfave/cli/v2 v2.3.0 h1:qph92Y649prgesehzOrQjdWyxFOp/QVM+6imKHad91M=
github.com/urfave/cli/v2 v2.3.0/go.mod h1:LJmUH05zAU44vOAcrfzZQKsZbVcdbOG8rtL3/XcUArI=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm080zCjGlMRFzhUhsZKEZO7MGek=
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golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
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golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
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golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
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google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
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google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
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14
server/cache.go Normal file
View File

@@ -0,0 +1,14 @@
package server
import (
_ "github.com/mattn/go-sqlite3" // SQLite driver
"time"
)
type cache interface {
AddMessage(m *message) error
Messages(topic string, since time.Time) ([]*message, error)
MessageCount(topic string) (int, error)
Topics() (map[string]*topic, error)
Prune(keep time.Duration) error
}

80
server/cache_mem.go Normal file
View File

@@ -0,0 +1,80 @@
package server
import (
_ "github.com/mattn/go-sqlite3" // SQLite driver
"sync"
"time"
)
type memCache struct {
messages map[string][]*message
mu sync.Mutex
}
var _ cache = (*memCache)(nil)
func newMemCache() *memCache {
return &memCache{
messages: make(map[string][]*message),
}
}
func (s *memCache) AddMessage(m *message) error {
s.mu.Lock()
defer s.mu.Unlock()
if _, ok := s.messages[m.Topic]; !ok {
s.messages[m.Topic] = make([]*message, 0)
}
s.messages[m.Topic] = append(s.messages[m.Topic], m)
return nil
}
func (s *memCache) Messages(topic string, since time.Time) ([]*message, error) {
s.mu.Lock()
defer s.mu.Unlock()
if _, ok := s.messages[topic]; !ok {
return make([]*message, 0), nil
}
messages := make([]*message, 0) // copy!
for _, m := range s.messages[topic] {
msgTime := time.Unix(m.Time, 0)
if msgTime == since || msgTime.After(since) {
messages = append(messages, m)
}
}
return messages, nil
}
func (s *memCache) MessageCount(topic string) (int, error) {
s.mu.Lock()
defer s.mu.Unlock()
if _, ok := s.messages[topic]; !ok {
return 0, nil
}
return len(s.messages[topic]), nil
}
func (s *memCache) Topics() (map[string]*topic, error) {
// Hack since we know when this is called there are no messages!
return make(map[string]*topic), nil
}
func (s *memCache) Prune(keep time.Duration) error {
s.mu.Lock()
defer s.mu.Unlock()
for topic, _ := range s.messages {
s.pruneTopic(topic, keep)
}
return nil
}
func (s *memCache) pruneTopic(topic string, keep time.Duration) {
for i, m := range s.messages[topic] {
msgTime := time.Unix(m.Time, 0)
if time.Since(msgTime) < keep {
s.messages[topic] = s.messages[topic][i:]
return
}
}
s.messages[topic] = make([]*message, 0) // all messages expired
}

127
server/cache_sqlite.go Normal file
View File

@@ -0,0 +1,127 @@
package server
import (
"database/sql"
"errors"
_ "github.com/mattn/go-sqlite3" // SQLite driver
"time"
)
const (
createTableQuery = `
BEGIN;
CREATE TABLE IF NOT EXISTS messages (
id VARCHAR(20) PRIMARY KEY,
time INT NOT NULL,
topic VARCHAR(64) NOT NULL,
message VARCHAR(1024) NOT NULL
);
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 < ?`
selectMessagesSinceTimeQuery = `
SELECT id, time, message
FROM messages
WHERE topic = ? AND time >= ?
ORDER BY time ASC
`
selectMessageCountQuery = `SELECT count(*) FROM messages WHERE topic = ?`
selectTopicsQuery = `SELECT topic, MAX(time) FROM messages GROUP BY TOPIC`
)
type sqliteCache struct {
db *sql.DB
}
var _ cache = (*sqliteCache)(nil)
func newSqliteCache(filename string) (*sqliteCache, error) {
db, err := sql.Open("sqlite3", filename)
if err != nil {
return nil, err
}
if _, err := db.Exec(createTableQuery); err != nil {
return nil, err
}
return &sqliteCache{
db: db,
}, nil
}
func (c *sqliteCache) AddMessage(m *message) error {
_, err := c.db.Exec(insertMessageQuery, m.ID, m.Time, m.Topic, m.Message)
return err
}
func (c *sqliteCache) Messages(topic string, since time.Time) ([]*message, error) {
rows, err := c.db.Query(selectMessagesSinceTimeQuery, topic, since.Unix())
if err != nil {
return nil, err
}
defer rows.Close()
messages := make([]*message, 0)
for rows.Next() {
var timestamp int64
var id, msg string
if err := rows.Scan(&id, &timestamp, &msg); err != nil {
return nil, err
}
messages = append(messages, &message{
ID: id,
Time: timestamp,
Event: messageEvent,
Topic: topic,
Message: msg,
})
}
if err := rows.Err(); err != nil {
return nil, err
}
return messages, nil
}
func (c *sqliteCache) MessageCount(topic string) (int, error) {
rows, err := c.db.Query(selectMessageCountQuery, topic)
if err != nil {
return 0, err
}
defer rows.Close()
var count int
if !rows.Next() {
return 0, errors.New("no rows found")
}
if err := rows.Scan(&count); err != nil {
return 0, err
} else if err := rows.Err(); err != nil {
return 0, err
}
return count, nil
}
func (s *sqliteCache) Topics() (map[string]*topic, error) {
rows, err := s.db.Query(selectTopicsQuery)
if err != nil {
return nil, err
}
defer rows.Close()
topics := make(map[string]*topic, 0)
for rows.Next() {
var id string
var last int64
if err := rows.Scan(&id, &last); err != nil {
return nil, err
}
topics[id] = newTopic(id, time.Unix(last, 0))
}
if err := rows.Err(); err != nil {
return nil, err
}
return topics, nil
}
func (c *sqliteCache) Prune(keep time.Duration) error {
_, err := c.db.Exec(pruneMessagesQuery, time.Now().Add(-1*keep).Unix())
return err
}

View File

@@ -25,27 +25,44 @@
<meta property="og:site_name" content="ntfy.sh" />
<meta property="og:title" content="ntfy.sh | simple HTTP-based pub-sub" />
<meta property="og:description" content="ntfy is a simple HTTP-based pub-sub notification service. It allows you to send desktop notifications via scripts from any computer, entirely without signup or cost. Made with ❤ by Philipp C. Heckel, Apache License 2.0, source at https://heckel.io/ntfy." />
<meta property="og:image" content="/static/img/favicon.png" />
<meta property="og:image" content="/static/img/ntfy.png" />
<meta property="og:url" content="https://ntfy.sh" />
</head>
<body>
<div id="main">
<h1>ntfy.sh - simple HTTP-based pub-sub</h1>
<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>
<h2>Publishing messages</h2>
<p>
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, <b>the topic is essentially a password</b>, so pick something that's not easily guessable.
</p>
<p class="smallMarginBottom">
Here's an example showing how to publish a message using <tt>curl</tt>:
</p>
<code>
curl -d "long process is done" ntfy.sh/mytopic
</code>
<p class="smallMarginBottom">
Here's an example in JS with <tt>fetch()</tt> (see <a href="https://github.com/binwiederhier/ntfy/tree/main/examples">full example</a>):
</p>
<code>
fetch('https://ntfy.sh/mytopic', {<br/>
&nbsp;&nbsp;method: 'POST', // PUT works too<br/>
&nbsp;&nbsp;body: 'Hello from the other side.'<br/>
})
</code>
<h2>Subscribe to a topic</h2>
<p>
Topics are created on the fly by subscribing to them. You can create and subscribe to a topic either in this web UI, or in
your own app by subscribing to an <a href="https://developer.mozilla.org/en-US/docs/Web/API/EventSource">EventSource</a>,
a JSON feed, or raw feed.
</p>
<p>
Because there is no sign-up, <b>the topic is essentially a password</b>, so pick something that's not easily guessable.
You can create and subscribe to a topic either in this web UI, or in your own app by subscribing to an
<a href="https://developer.mozilla.org/en-US/docs/Web/API/EventSource">EventSource</a>, a JSON feed, or raw feed.
</p>
<h3>Subscribe via web</h3>
@@ -64,9 +81,15 @@
<ul id="topicsList"></ul>
<audio id="notifySound" src="static/sound/mixkit-message-pop-alert-2354.mp3"></audio>
<h3>Subscribe via phone</h3>
<p>
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>
<p class="smallMarginBottom">
Using <a href="https://developer.mozilla.org/en-US/docs/Web/API/EventSource">EventSource</a>, you can consume
Using <a href="https://developer.mozilla.org/en-US/docs/Web/API/EventSource">EventSource</a> in JS, you can consume
notifications like this (see <a href="https://github.com/binwiederhier/ntfy/tree/main/examples">full example</a>):
</p>
<code>
@@ -76,30 +99,29 @@
};
</code>
<p class="smallMarginBottom">
Or you can use <tt>curl</tt> or any other HTTP library. Here's an example for the <tt>/json</tt> endpoint,
which prints one JSON message per line (keepalive and open messages have an "event" field):
</p>
<code>
$ curl -s ntfy.sh/mytopic/json<br/>
{"time":1635359841,"event":"open"}<br/>
{"time":1635359844,"message":"This is a notification"}<br/>
{"time":1635359851,"event":"keepalive"}
</code>
<p class="smallMarginBottom">
Using the <tt>/sse</tt> endpoint (SSE, server-sent events stream):
You can also use the same <tt>/sse</tt> endpoint via <tt>curl</tt> or any other HTTP library:
</p>
<code>
$ curl -s ntfy.sh/mytopic/sse<br/>
event: open<br/>
data: {"time":1635359796,"event":"open"}<br/><br/>
data: {"id":"weSj9RtNkj","time":1635528898,"event":"open","topic":"mytopic"}<br/><br/>
data: {"time":1635359803,"message":"This is a notification"}<br/><br/>
data: {"id":"p0M5y6gcCY","time":1635528909,"event":"message","topic":"mytopic","message":"Hi!"}<br/><br/>
event: keepalive<br/>
data: {"time":1635359806,"event":"keepalive"}
data: {"id":"VNxNIg5fpt","time":1635528928,"event":"keepalive","topic":"test"}
</code>
<p class="smallMarginBottom">
Using the <tt>/raw</tt> endpoint (empty lines are keepalive messages):
To consume JSON instead, use the <tt>/json</tt> endpoint, which prints one message per line:
</p>
<code>
$ curl -s ntfy.sh/mytopic/json<br/>
{"id":"SLiKI64DOt","time":1635528757,"event":"open","topic":"mytopic"}<br/>
{"id":"hwQ2YpKdmg","time":1635528741,"event":"message","topic":"mytopic","message":"Hi!"}<br/>
{"id":"DGUDShMCsc","time":1635528787,"event":"keepalive","topic":"mytopic"}
</code>
<p class="smallMarginBottom">
Or use the <tt>/raw</tt> endpoint if you need something super simple (empty lines are keepalive messages):
</p>
<code>
$ curl -s ntfy.sh/mytopic/raw<br/>
@@ -107,26 +129,25 @@
This is a notification
</code>
<h2>Publishing messages</h2>
<h3>Message buffering and polling</h3>
<p class="smallMarginBottom">
Publishing messages can be done via PUT or POST using. Here's an example using <tt>curl</tt>:
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 <tt>since=...</tt> query parameter. It takes either a
duration (e.g. <tt>10m</tt> or <tt>30s</tt>) or a Unix timestamp (e.g. <tt>1635528757</tt>):
</p>
<code>
curl -d "long process is done" ntfy.sh/mytopic
$ curl -s "ntfy.sh/mytopic/json?since=10m"<br/>
# Same output as above, but includes messages from up to 10 minutes ago
</code>
<p class="smallMarginBottom">
Here's an example in JS with <tt>fetch()</tt> (see <a href="https://github.com/binwiederhier/ntfy/tree/main/examples">full example</a>):
You can also just poll for messages if you don't like the long-standing connection using the <tt>poll=1</tt>
query parameter. The connection will end after all available messages have been read. This parameter has to be
combined with <tt>since=</tt>.
</p>
<code>
fetch('https://ntfy.sh/mytopic', {<br/>
&nbsp;&nbsp;method: 'POST', // PUT works too<br/>
&nbsp;&nbsp;body: 'Hello from the other side.'<br/>
})
$ curl -s "ntfy.sh/mytopic/json?poll=1&since=10m"<br/>
# Returns messages from up to 10 minutes ago and ends the connection
</code>
<p>
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.
</p>
<h2>FAQ</h2>
<p>
@@ -151,6 +172,28 @@
That said, the logs do not contain any topic names or other details about you. Check the code if you don't believe me.
</p>
<p>
<b>Why is Firebase used?</b><br/>
In addition to caching messages locally and delivering them to long-polling subscribers, all messages are also
published to Firebase Cloud Messaging (FCM) (if <tt>FirebaseKeyFile</tt> is set, which it is on ntfy.sh). This
is to facilitate instant notifications on Android. I tried really, really hard to avoid using FCM, but newer
versions of Android made it impossible to implement <a href="https://developer.android.com/guide/background">background services</a>>.
I'm sorry.
</p>
<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 one exception
is the Firebase Cloud Messaging (FCM) service, which is required to provide instant Android notifications (see
FAQ for details).
</p>
<p>
The web server does not log or otherwise store request paths, remote IP addresses or even topics or messages,
aside from a short on-disk cache (up to a day) to support service restarts.
</p>
<center id="ironicCenterTagDontFreakOut"><i>Made with ❤️ by <a href="https://heckel.io">Philipp C. Heckel</a></i></center>
</div>
<script src="static/js/app.js"></script>

View File

@@ -1,17 +1,27 @@
package server
import "time"
import (
"heckel.io/ntfy/util"
"time"
)
// List of possible events
const (
openEvent = "open"
keepaliveEvent = "keepalive"
messageEvent = "message"
)
const (
messageIDLength = 10
)
// message represents a message published to a topic
type message struct {
Time int64 `json:"time"` // Unix time in seconds
Event string `json:"event,omitempty"` // One of the above
ID string `json:"id"` // Random message ID
Time int64 `json:"time"` // Unix time in seconds
Event string `json:"event"` // One of the above
Topic string `json:"topic"`
Message string `json:"message,omitempty"`
}
@@ -19,25 +29,27 @@ type message struct {
type messageEncoder func(msg *message) (string, error)
// newMessage creates a new message with the current timestamp
func newMessage(event string, msg string) *message {
func newMessage(event, topic, msg string) *message {
return &message{
ID: util.RandomString(messageIDLength),
Time: time.Now().Unix(),
Event: event,
Topic: topic,
Message: msg,
}
}
// newOpenMessage is a convenience method to create an open message
func newOpenMessage() *message {
return newMessage(openEvent, "")
func newOpenMessage(topic string) *message {
return newMessage(openEvent, topic, "")
}
// newKeepaliveMessage is a convenience method to create a keepalive message
func newKeepaliveMessage() *message {
return newMessage(keepaliveEvent, "")
func newKeepaliveMessage(topic string) *message {
return newMessage(keepaliveEvent, topic, "")
}
// newDefaultMessage is a convenience method to create a notification message
func newDefaultMessage(msg string) *message {
return newMessage("", msg)
func newDefaultMessage(topic, msg string) *message {
return newMessage(messageEvent, topic, msg)
}

View File

@@ -2,36 +2,40 @@ package server
import (
"bytes"
"context"
"embed"
_ "embed" // required for go:embed
"encoding/json"
firebase "firebase.google.com/go"
"firebase.google.com/go/messaging"
"fmt"
"golang.org/x/time/rate"
"google.golang.org/api/option"
"heckel.io/ntfy/config"
"io"
"log"
"net"
"net/http"
"regexp"
"strconv"
"strings"
"sync"
"time"
)
// TODO add "max messages in a topic" limit
// TODO implement "since=<ID>"
// Server is the main server
type Server struct {
config *config.Config
topics map[string]*topic
visitors map[string]*visitor
firebase subscriber
messages int64
cache cache
mu sync.Mutex
}
// visitor represents an API user, and its associated rate.Limiter used for rate limiting
type visitor struct {
limiter *rate.Limiter
seen time.Time
}
// errHTTP is a generic HTTP error for any non-200 HTTP error
type errHTTP struct {
Code int
@@ -43,15 +47,15 @@ func (e errHTTP) Error() string {
}
const (
messageLimit = 1024
visitorExpungeAfter = 30 * time.Minute
messageLimit = 1024
)
var (
topicRegex = regexp.MustCompile(`^/[^/]+$`)
jsonRegex = regexp.MustCompile(`^/[^/]+/json$`)
sseRegex = regexp.MustCompile(`^/[^/]+/sse$`)
rawRegex = regexp.MustCompile(`^/[^/]+/raw$`)
topicRegex = regexp.MustCompile(`^/[^/]+$`)
jsonRegex = regexp.MustCompile(`^/[^/]+/json$`)
sseRegex = regexp.MustCompile(`^/[^/]+/sse$`)
rawRegex = regexp.MustCompile(`^/[^/]+/raw$`)
staticRegex = regexp.MustCompile(`^/static/.+`)
//go:embed "index.html"
@@ -60,16 +64,66 @@ var (
//go:embed static
webStaticFs embed.FS
errHTTPBadRequest = &errHTTP{http.StatusBadRequest, http.StatusText(http.StatusBadRequest)}
errHTTPNotFound = &errHTTP{http.StatusNotFound, http.StatusText(http.StatusNotFound)}
errHTTPTooManyRequests = &errHTTP{http.StatusTooManyRequests, http.StatusText(http.StatusTooManyRequests)}
)
func New(conf *config.Config) *Server {
func New(conf *config.Config) (*Server, error) {
var firebaseSubscriber subscriber
if conf.FirebaseKeyFile != "" {
var err error
firebaseSubscriber, err = createFirebaseSubscriber(conf)
if err != nil {
return nil, err
}
}
cache, err := createCache(conf)
if err != nil {
return nil, err
}
topics, err := cache.Topics()
if err != nil {
return nil, err
}
return &Server{
config: conf,
topics: make(map[string]*topic),
cache: cache,
firebase: firebaseSubscriber,
topics: topics,
visitors: make(map[string]*visitor),
}, nil
}
func createCache(conf *config.Config) (cache, error) {
if conf.CacheFile != "" {
return newSqliteCache(conf.CacheFile)
}
return newMemCache(), nil
}
func createFirebaseSubscriber(conf *config.Config) (subscriber, error) {
fb, err := firebase.NewApp(context.Background(), nil, option.WithCredentialsFile(conf.FirebaseKeyFile))
if err != nil {
return nil, err
}
msg, err := fb.Messaging(context.Background())
if err != nil {
return nil, err
}
return func(m *message) error {
_, err := msg.Send(context.Background(), &messaging.Message{
Topic: m.Topic,
Data: map[string]string{
"id": m.ID,
"time": fmt.Sprintf("%d", m.Time),
"event": m.Event,
"topic": m.Topic,
"message": m.Message,
},
})
return err
}, nil
}
func (s *Server) Run() error {
@@ -89,28 +143,6 @@ func (s *Server) listenAndServe() error {
return http.ListenAndServe(s.config.ListenHTTP, nil)
}
func (s *Server) updateStatsAndExpire() {
s.mu.Lock()
defer s.mu.Unlock()
// Expire visitors from rate visitors map
for ip, v := range s.visitors {
if time.Since(v.seen) > visitorExpungeAfter {
delete(s.visitors, ip)
}
}
// Print stats
var subscribers, messages int
for _, t := range s.topics {
subs, msgs := t.Stats()
subscribers += subs
messages += msgs
}
log.Printf("Stats: %d topic(s), %d subscriber(s), %d message(s) sent, %d visitor(s)",
len(s.topics), subscribers, messages, len(s.visitors))
}
func (s *Server) handle(w http.ResponseWriter, r *http.Request) {
if err := s.handleInternal(w, r); err != nil {
if e, ok := err.(*errHTTP); ok {
@@ -123,21 +155,21 @@ func (s *Server) handle(w http.ResponseWriter, r *http.Request) {
func (s *Server) handleInternal(w http.ResponseWriter, r *http.Request) error {
v := s.visitor(r.RemoteAddr)
if !v.limiter.Allow() {
return errHTTPTooManyRequests
if err := v.RequestAllowed(); err != nil {
return err
}
if r.Method == http.MethodGet && r.URL.Path == "/" {
return s.handleHome(w, r)
} else if r.Method == http.MethodGet && staticRegex.MatchString(r.URL.Path) {
return s.handleStatic(w, r)
} else if r.Method == http.MethodGet && jsonRegex.MatchString(r.URL.Path) {
return s.handleSubscribeJSON(w, r)
} else if r.Method == http.MethodGet && sseRegex.MatchString(r.URL.Path) {
return s.handleSubscribeSSE(w, r)
} else if r.Method == http.MethodGet && rawRegex.MatchString(r.URL.Path) {
return s.handleSubscribeRaw(w, r)
} else if (r.Method == http.MethodPut || r.Method == http.MethodPost) && topicRegex.MatchString(r.URL.Path) {
return s.handlePublishHTTP(w, r)
return s.handlePublish(w, r, v)
} else if r.Method == http.MethodGet && jsonRegex.MatchString(r.URL.Path) {
return s.handleSubscribeJSON(w, r, v)
} else if r.Method == http.MethodGet && sseRegex.MatchString(r.URL.Path) {
return s.handleSubscribeSSE(w, r, v)
} else if r.Method == http.MethodGet && rawRegex.MatchString(r.URL.Path) {
return s.handleSubscribeRaw(w, r, v)
} else if r.Method == http.MethodOptions {
return s.handleOptions(w, r)
}
@@ -149,7 +181,12 @@ func (s *Server) handleHome(w http.ResponseWriter, r *http.Request) error {
return err
}
func (s *Server) handlePublishHTTP(w http.ResponseWriter, r *http.Request) error {
func (s *Server) handleStatic(w http.ResponseWriter, r *http.Request) error {
http.FileServer(http.FS(webStaticFs)).ServeHTTP(w, r)
return nil
}
func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visitor) error {
t, err := s.topic(r.URL.Path[1:])
if err != nil {
return err
@@ -159,14 +196,24 @@ func (s *Server) handlePublishHTTP(w http.ResponseWriter, r *http.Request) error
if err != nil {
return err
}
if err := t.Publish(newDefaultMessage(string(b))); err != nil {
m := newDefaultMessage(t.id, string(b))
if err := t.Publish(m); err != nil {
return err
}
if err := s.cache.AddMessage(m); err != nil {
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()
return nil
}
func (s *Server) handleSubscribeJSON(w http.ResponseWriter, r *http.Request) error {
func (s *Server) handleSubscribeJSON(w http.ResponseWriter, r *http.Request, v *visitor) error {
encoder := func(msg *message) (string, error) {
var buf bytes.Buffer
if err := json.NewEncoder(&buf).Encode(&msg); err != nil {
@@ -174,35 +221,47 @@ func (s *Server) handleSubscribeJSON(w http.ResponseWriter, r *http.Request) err
}
return buf.String(), nil
}
return s.handleSubscribe(w, r, "json", "application/stream+json", encoder)
return s.handleSubscribe(w, r, v, "json", "application/stream+json", encoder)
}
func (s *Server) handleSubscribeSSE(w http.ResponseWriter, r *http.Request) error {
func (s *Server) handleSubscribeSSE(w http.ResponseWriter, r *http.Request, v *visitor) error {
encoder := func(msg *message) (string, error) {
var buf bytes.Buffer
if err := json.NewEncoder(&buf).Encode(&msg); err != nil {
return "", err
}
if msg.Event != "" {
if msg.Event != messageEvent {
return fmt.Sprintf("event: %s\ndata: %s\n", msg.Event, buf.String()), nil // Browser's .onmessage() does not fire on this!
}
return fmt.Sprintf("data: %s\n", buf.String()), nil
}
return s.handleSubscribe(w, r, "sse", "text/event-stream", encoder)
return s.handleSubscribe(w, r, v, "sse", "text/event-stream", encoder)
}
func (s *Server) handleSubscribeRaw(w http.ResponseWriter, r *http.Request) error {
func (s *Server) handleSubscribeRaw(w http.ResponseWriter, r *http.Request, v *visitor) error {
encoder := func(msg *message) (string, error) {
if msg.Event == "" { // only handle default events
if msg.Event == messageEvent { // only handle default events
return strings.ReplaceAll(msg.Message, "\n", " ") + "\n", nil
}
return "\n", nil // "keepalive" and "open" events just send an empty line
}
return s.handleSubscribe(w, r, "raw", "text/plain", encoder)
return s.handleSubscribe(w, r, v, "raw", "text/plain", encoder)
}
func (s *Server) handleSubscribe(w http.ResponseWriter, r *http.Request, format string, contentType string, encoder messageEncoder) error {
t := s.createTopic(strings.TrimSuffix(r.URL.Path[1:], "/"+format)) // Hack
func (s *Server) handleSubscribe(w http.ResponseWriter, r *http.Request, v *visitor, format string, contentType string, encoder messageEncoder) error {
if err := v.AddSubscription(); err != nil {
return errHTTPTooManyRequests
}
defer v.RemoveSubscription()
t, err := s.topic(strings.TrimSuffix(r.URL.Path[1:], "/"+format)) // Hack
if err != nil {
return err
}
since, err := parseSince(r)
if err != nil {
return err
}
poll := r.URL.Query().Has("poll")
sub := func(msg *message) error {
m, err := encoder(msg)
if err != nil {
@@ -216,63 +275,118 @@ func (s *Server) handleSubscribe(w http.ResponseWriter, r *http.Request, format
}
return nil
}
subscriberID := t.Subscribe(sub)
defer s.unsubscribe(t, subscriberID)
w.Header().Set("Access-Control-Allow-Origin", "*") // CORS, allow cross-origin requests
w.Header().Set("Content-Type", contentType)
if err := sub(newOpenMessage()); err != nil { // Send out open message
if poll {
return s.sendOldMessages(t, since, sub)
}
subscriberID := t.Subscribe(sub)
defer t.Unsubscribe(subscriberID)
if err := sub(newOpenMessage(t.id)); err != nil { // Send out open message
return err
}
if err := s.sendOldMessages(t, since, sub); err != nil {
return err
}
for {
select {
case <-t.ctx.Done():
return nil
case <-r.Context().Done():
return nil
case <-time.After(s.config.KeepaliveInterval):
if err := sub(newKeepaliveMessage()); err != nil { // Send keepalive message
v.Keepalive()
if err := sub(newKeepaliveMessage(t.id)); err != nil { // Send keepalive message
return err
}
}
}
}
func (s *Server) sendOldMessages(t *topic, since time.Time, sub subscriber) error {
if since.IsZero() {
return nil
}
messages, err := s.cache.Messages(t.id, since)
if err != nil {
return err
}
for _, m := range messages {
if err := sub(m); err != nil {
return err
}
}
return nil
}
func parseSince(r *http.Request) (time.Time, error) {
if !r.URL.Query().Has("since") {
return time.Time{}, nil
}
if since, err := strconv.ParseInt(r.URL.Query().Get("since"), 10, 64); err == nil {
return time.Unix(since, 0), nil
}
if d, err := time.ParseDuration(r.URL.Query().Get("since")); err == nil {
return time.Now().Add(-1 * d), nil
}
return time.Time{}, errHTTPBadRequest
}
func (s *Server) handleOptions(w http.ResponseWriter, r *http.Request) error {
w.Header().Set("Access-Control-Allow-Origin", "*") // CORS, allow cross-origin requests
w.Header().Set("Access-Control-Allow-Methods", "GET, PUT, POST")
return nil
}
func (s *Server) handleStatic(w http.ResponseWriter, r *http.Request) error {
http.FileServer(http.FS(webStaticFs)).ServeHTTP(w, r)
return nil
}
func (s *Server) createTopic(id string) *topic {
func (s *Server) topic(id string) (*topic, error) {
s.mu.Lock()
defer s.mu.Unlock()
if _, ok := s.topics[id]; !ok {
s.topics[id] = newTopic(id)
if len(s.topics) >= s.config.GlobalTopicLimit {
return nil, errHTTPTooManyRequests
}
s.topics[id] = newTopic(id, time.Now())
if s.firebase != nil {
s.topics[id].Subscribe(s.firebase)
}
}
return s.topics[id]
return s.topics[id], nil
}
func (s *Server) topic(topicID string) (*topic, error) {
func (s *Server) updateStatsAndExpire() {
s.mu.Lock()
defer s.mu.Unlock()
c, ok := s.topics[topicID]
if !ok {
return nil, errHTTPNotFound
}
return c, nil
}
func (s *Server) unsubscribe(t *topic, subscriberID int) {
s.mu.Lock()
defer s.mu.Unlock()
if subscribers := t.Unsubscribe(subscriberID); subscribers == 0 {
delete(s.topics, t.id)
// Expire visitors from rate visitors map
for ip, v := range s.visitors {
if v.Stale() {
delete(s.visitors, ip)
}
}
// Prune cache
if err := s.cache.Prune(s.config.CacheDuration); err != nil {
log.Printf("error pruning cache: %s", err.Error())
}
// Prune old messages, remove subscriptions without subscribers
var subscribers, messages int
for _, t := range s.topics {
subs := t.Subscribers()
msgs, err := s.cache.MessageCount(t.id)
if err != nil {
log.Printf("cannot get stats for topic %s: %s", t.id, err.Error())
continue
}
if msgs == 0 && (subs == 0 || (s.firebase != nil && subs == 1)) { // Firebase is a subscriber!
delete(s.topics, t.id)
continue
}
subscribers += subs
messages += msgs
}
// Print stats
log.Printf("Stats: %d message(s) published, %d topic(s) active, %d subscriber(s), %d message(s) buffered, %d visitor(s)",
s.messages, len(s.topics), subscribers, messages, len(s.visitors))
}
// visitor creates or retrieves a rate.Limiter for the given visitor.
@@ -286,12 +400,8 @@ func (s *Server) visitor(remoteAddr string) *visitor {
}
v, exists := s.visitors[ip]
if !exists {
v = &visitor{
rate.NewLimiter(s.config.Limit, s.config.LimitBurst),
time.Now(),
}
s.visitors[ip] = v
return v
s.visitors[ip] = newVisitor(s.config)
return s.visitors[ip]
}
v.seen = time.Now()
return v

View File

@@ -6,12 +6,13 @@ html, body {
font-size: 1.1em;
}
a {
color: #39005a;
a, a:visited {
color: #3a9784;
}
a:hover {
text-decoration: none;
color: #317f6f;
}
h1 {
@@ -20,7 +21,6 @@ h1 {
font-size: 2.5em;
}
h2 {
margin-top: 20px;
margin-bottom: 5px;

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@@ -1,8 +1,6 @@
package server
import (
"context"
"errors"
"log"
"math/rand"
"sync"
@@ -13,11 +11,8 @@ import (
// can publish a message
type topic struct {
id string
subscribers map[int]subscriber
messages int
last time.Time
ctx context.Context
cancel context.CancelFunc
subscribers map[int]subscriber
mu sync.Mutex
}
@@ -25,14 +20,11 @@ type topic struct {
type subscriber func(msg *message) error
// newTopic creates a new topic
func newTopic(id string) *topic {
ctx, cancel := context.WithCancel(context.Background())
func newTopic(id string, last time.Time) *topic {
return &topic{
id: id,
last: last,
subscribers: make(map[int]subscriber),
last: time.Now(),
ctx: ctx,
cancel: cancel,
}
}
@@ -45,21 +37,16 @@ func (t *topic) Subscribe(s subscriber) int {
return subscriberID
}
func (t *topic) Unsubscribe(id int) int {
func (t *topic) Unsubscribe(id int) {
t.mu.Lock()
defer t.mu.Unlock()
delete(t.subscribers, id)
return len(t.subscribers)
}
func (t *topic) Publish(m *message) error {
t.mu.Lock()
defer t.mu.Unlock()
if len(t.subscribers) == 0 {
return errors.New("no subscribers")
}
t.last = time.Now()
t.messages++
for _, s := range t.subscribers {
if err := s(m); err != nil {
log.Printf("error publishing message to subscriber")
@@ -68,12 +55,8 @@ func (t *topic) Publish(m *message) error {
return nil
}
func (t *topic) Stats() (subscribers int, messages int) {
func (t *topic) Subscribers() int {
t.mu.Lock()
defer t.mu.Unlock()
return len(t.subscribers), t.messages
}
func (t *topic) Close() {
t.cancel()
return len(t.subscribers)
}

65
server/visitor.go Normal file
View File

@@ -0,0 +1,65 @@
package server
import (
"golang.org/x/time/rate"
"heckel.io/ntfy/config"
"heckel.io/ntfy/util"
"sync"
"time"
)
const (
visitorExpungeAfter = 30 * time.Minute
)
// visitor represents an API user, and its associated rate.Limiter used for rate limiting
type visitor struct {
config *config.Config
limiter *rate.Limiter
subscriptions *util.Limiter
seen time.Time
mu sync.Mutex
}
func newVisitor(conf *config.Config) *visitor {
return &visitor{
config: conf,
limiter: rate.NewLimiter(conf.VisitorRequestLimit, conf.VisitorRequestLimitBurst),
subscriptions: util.NewLimiter(int64(conf.VisitorSubscriptionLimit)),
seen: time.Now(),
}
}
func (v *visitor) RequestAllowed() error {
if !v.limiter.Allow() {
return errHTTPTooManyRequests
}
return nil
}
func (v *visitor) AddSubscription() error {
v.mu.Lock()
defer v.mu.Unlock()
if err := v.subscriptions.Add(1); err != nil {
return errHTTPTooManyRequests
}
return nil
}
func (v *visitor) RemoveSubscription() {
v.mu.Lock()
defer v.mu.Unlock()
v.subscriptions.Sub(1)
}
func (v *visitor) Keepalive() {
v.mu.Lock()
defer v.mu.Unlock()
v.seen = time.Now()
}
func (v *visitor) Stale() bool {
v.mu.Lock()
defer v.mu.Unlock()
return time.Since(v.seen) > visitorExpungeAfter
}

65
util/limit.go Normal file
View File

@@ -0,0 +1,65 @@
package util
import (
"errors"
"sync"
)
// ErrLimitReached is the error returned by the Limiter and LimitWriter when the predefined limit has been reached
var ErrLimitReached = errors.New("limit reached")
// Limiter is a helper that allows adding values up to a well-defined limit. Once the limit is reached
// ErrLimitReached will be returned. Limiter may be used by multiple goroutines.
type Limiter struct {
value int64
limit int64
mu sync.Mutex
}
// NewLimiter creates a new Limiter
func NewLimiter(limit int64) *Limiter {
return &Limiter{
limit: limit,
}
}
// Add adds n to the limiters internal value, but only if the limit has not been reached. If the limit would be
// exceeded after adding n, ErrLimitReached is returned.
func (l *Limiter) Add(n int64) error {
l.mu.Lock()
defer l.mu.Unlock()
if l.limit == 0 {
l.value += n
return nil
} else if l.value+n <= l.limit {
l.value += n
return nil
} else {
return ErrLimitReached
}
}
// Sub subtracts a value from the limiters internal value
func (l *Limiter) Sub(n int64) {
l.Add(-n)
}
// Set sets the value of the limiter to n. This function ignores the limit. It is meant to set the value
// based on reality.
func (l *Limiter) Set(n int64) {
l.mu.Lock()
l.value = n
l.mu.Unlock()
}
// Value returns the internal value of the limiter
func (l *Limiter) Value() int64 {
l.mu.Lock()
defer l.mu.Unlock()
return l.value
}
// Limit returns the defined limit
func (l *Limiter) Limit() int64 {
return l.limit
}

29
util/util.go Normal file
View File

@@ -0,0 +1,29 @@
package util
import (
"math/rand"
"os"
"time"
)
const (
randomStringCharset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
)
var (
random = rand.New(rand.NewSource(time.Now().UnixNano()))
)
func FileExists(filename string) bool {
stat, _ := os.Stat(filename)
return stat != nil
}
// RandomString returns a random string with a given length
func RandomString(length int) string {
b := make([]byte, length)
for i := range b {
b[i] = randomStringCharset[random.Intn(len(randomStringCharset))]
}
return string(b)
}