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Publish as JSON

This commit is contained in:
Philipp Heckel 2022-03-16 14:16:54 -04:00
parent 37d4d5d647
commit 8fcc40942f
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145
docs/publish.md
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@ -499,7 +499,7 @@ Here are a few examples (assuming today's date is **12/10/2021, 9am, Eastern Tim
</td>
</tr></table>
## Webhooks (Send via GET)
## Webhooks (publish via GET)
In addition to using PUT/POST, you can also send to topics via simple HTTP GET requests. This makes it easy to use
a ntfy topic as a [webhook](https://en.wikipedia.org/wiki/Webhook), or if your client has limited HTTP support (e.g.
like the [MacroDroid](https://play.google.com/store/apps/details?id=com.arlosoft.macrodroid) Android app).
@ -592,6 +592,141 @@ Here's an example with a custom message, tags and a priority:
file_get_contents('https://ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull');
```
## Publish as JSON
For some integrations with other tools (e.g. [Jellyfin](https://jellyfin.org/), [overseerr](https://overseerr.dev/)),
adding custom headers to HTTP requests may be tricky or impossible, so ntfy also allows publishing the entire message
as JSON in the request body.
To publish as JSON, simple PUT/POST the JSON object directly to the ntfy root URL. The message format is described below
the example.
!!! info
To publish as JSON, you must **PUT/POST to the ntfy root URL**, not to the topic URL. Be sure to check that you're
POST-ing to `https://ntfy.sh/` (correct), and not to `https://ntfy.sh/mytopic` (incorrect).
Here's an example using all supported parameters. The `topic` parameter is the only required one:
=== "Command line (curl)"
```
curl ntfy.sh \
-d '{
"topic": "mytopic",
"message": "Disk space is low at 5.1 GB",
"title": "Low disk space alert",
"tags": ["warning","cd"],
"priority": 4,
"attach": "https://filesrv.lan/space.jpg",
"filename": "diskspace.jpg",
"click": "https://homecamera.lan/xasds1h2xsSsa/"
}'
```
=== "HTTP"
``` http
POST / HTTP/1.1
Host: ntfy.sh
{
"topic": "mytopic",
"message": "Disk space is low at 5.1 GB",
"title": "Low disk space alert",
"tags": ["warning","cd"],
"priority": 4,
"attach": "https://filesrv.lan/space.jpg",
"filename": "diskspace.jpg",
"click": "https://homecamera.lan/xasds1h2xsSsa/"
}
```
=== "JavaScript"
``` javascript
fetch('https://ntfy.sh', {
method: 'POST',
body: JSON.stringify({
"topic": "mytopic",
"message": "Disk space is low at 5.1 GB",
"title": "Low disk space alert",
"tags": ["warning","cd"],
"priority": 4,
"attach": "https://filesrv.lan/space.jpg",
"filename": "diskspace.jpg",
"click": "https://homecamera.lan/xasds1h2xsSsa/"
})
})
```
=== "Go"
``` go
// You should probably use json.Marshal() instead and make a proper struct,
// or even just use req.Header.Set() like in the other examples, but for the
// sake of the example, this is easier.
body := `{
"topic": "mytopic",
"message": "Disk space is low at 5.1 GB",
"title": "Low disk space alert",
"tags": ["warning","cd"],
"priority": 4,
"attach": "https://filesrv.lan/space.jpg",
"filename": "diskspace.jpg",
"click": "https://homecamera.lan/xasds1h2xsSsa/"
}`
req, _ := http.NewRequest("POST", "https://ntfy.sh/", strings.NewReader(body))
http.DefaultClient.Do(req)
```
=== "Python"
``` python
requests.post("https://ntfy.sh/",
data=json.dumps({
"topic": "mytopic",
"message": "Disk space is low at 5.1 GB",
"title": "Low disk space alert",
"tags": ["warning","cd"],
"priority": 4,
"attach": "https://filesrv.lan/space.jpg",
"filename": "diskspace.jpg",
"click": "https://homecamera.lan/xasds1h2xsSsa/"
})
)
```
=== "PHP"
``` php-inline
file_get_contents('https://ntfy.sh/', false, stream_context_create([
'http' => [
'method' => 'POST',
'header' => "Content-Type: application/json",
'content' => json_encode([
"topic": "mytopic",
"message": "Disk space is low at 5.1 GB",
"title": "Low disk space alert",
"tags": ["warning","cd"],
"priority": 4,
"attach": "https://filesrv.lan/space.jpg",
"filename": "diskspace.jpg",
"click": "https://homecamera.lan/xasds1h2xsSsa/"
])
]
]));
```
The JSON message format closely mirrors the format of the message you can consume when you [subscribe via the API](subscribe/api.md)
(see [JSON message format](subscribe/api.md#json-message-format) for details), but is not exactly identical. Here's an overview of
all the supported fields:
| Field | Required | Type | Example | Description |
|------------|----------|----------------------------------|--------------------------------|-----------------------------------------------------------------------|
| `topic` | ✔️ | *string* | `topic1` | Target topic name |
| `message` | - | *string* | `Some message` | Message body; set to `triggered` if empty or not passed |
| `title` | - | *string* | `Some title` | Message [title](#message-title) |
| `tags` | - | *string array* | `["tag1","tag2"]` | List of [tags](#tags-emojis) that may or not map to emojis |
| `priority` | - | *int (one of: 1, 2, 3, 4, or 5)* | `4` | Message [priority](#message-priority) with 1=min, 3=default and 5=max |
| `click` | - | *URL* | `https://example.com` | Website opened when notification is [clicked](#click-action) |
| `attach` | - | *URL* | `https://example.com/file.jpg` | URL of an attachment, see [attach via URL](#attach-file-from-url) |
| `filename` | - | *string* | `file.jpg` | File name of the attachment |
## Click action
You can define which URL to open when a notification is clicked. This may be useful if your notification is related
to a Zabbix alert or a transaction that you'd like to provide the deep-link for. Tapping the notification will open
@ -756,7 +891,13 @@ This could be a Dropbox link, a file from social media, or any other publicly av
externally hosted, the expiration or size limits from above do not apply here.
To attach an external file, simple pass the `X-Attach` header or query parameter (or any of its aliases `Attach` or `a`)
to specify the attachment URL. It can be any type of file. Here's an example showing how to attach an APK file:
to specify the attachment URL. It can be any type of file.
ntfy will automatically try to derive the file name from the URL (e.g `https://example.com/flower.jpg` will yield a
filename `flower.jpg`). To override this filename, you may send the `X-Filename` header or query parameter (or any of its
aliases `Filename`, `File` or `f`).
Here's an example showing how to attach an APK file:
=== "Command line (curl)"
```

15
docs/releases.md
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@ -5,25 +5,28 @@ and the [ntfy Android app](https://github.com/binwiederhier/ntfy-android/release
## ntfy server v1.18.0
Released XXXXXXXXXXXXXXX
**Features:**
* Publish messages as JSON ([#133](https://github.com/binwiederhier/ntfy/issues/133), thanks [@cmeis](https://github.com/cmeis) for reporting)
**Bug fixes:**
* rpm: do not overwrite server.yaml on package upgrade (#166, thanks @waclaw66 for reporting)
* rpm: do not overwrite server.yaml on package upgrade ([#166](https://github.com/binwiederhier/ntfy/issues/166), thanks [@waclaw66](https://github.com/waclaw66) for reporting)
**Deprecations:**
* Removed the ability to run server as `ntfy serve` as per [deprecation](https://ntfy.sh/docs/deprecations)
## ntfy Android app v1.10.0
Released XXXXXXXXXXXXXXX
## ntfy Android app v1.10.0 (UNRELEASED)
**Features:**
* Support for UnifiedPush 2.0 specification (bytes messages, #130)
* Export/import settings and subscriptions (#115, thanks @cmeis for reporting)
* Support for UnifiedPush 2.0 specification (bytes messages, [#130](https://github.com/binwiederhier/ntfy/issues/130))
* Export/import settings and subscriptions ([#115](https://github.com/binwiederhier/ntfy/issues/115), thanks [@cmeis](https://github.com/cmeis) for reporting)
**Bug fixes:**
* Display locale-specific times, with AM/PM or 24h format (#140, thanks @hl2guide for reporting)
* Display locale-specific times, with AM/PM or 24h format ([#140](https://github.com/binwiederhier/ntfy/issues/140), thanks [@hl2guide](https://github.com/hl2guide) for reporting)
## ntfy server v1.17.1
Released Mar 12, 2022

9
server/errors.go
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@ -35,10 +35,11 @@ var (
errHTTPBadRequestTopicDisallowed = &errHTTP{40010, http.StatusBadRequest, "invalid topic: topic name is disallowed", ""}
errHTTPBadRequestMessageNotUTF8 = &errHTTP{40011, http.StatusBadRequest, "invalid message: message must be UTF-8 encoded", ""}
errHTTPBadRequestAttachmentTooLarge = &errHTTP{40012, http.StatusBadRequest, "invalid request: attachment too large, or bandwidth limit reached", ""}
errHTTPBadRequestAttachmentURLInvalid = &errHTTP{40013, http.StatusBadRequest, "invalid request: attachment URL is invalid", ""}
errHTTPBadRequestAttachmentsDisallowed = &errHTTP{40014, http.StatusBadRequest, "invalid request: attachments not allowed", ""}
errHTTPBadRequestAttachmentsExpiryBeforeDelivery = &errHTTP{40015, http.StatusBadRequest, "invalid request: attachment expiry before delayed delivery date", ""}
errHTTPBadRequestWebSocketsUpgradeHeaderMissing = &errHTTP{40016, http.StatusBadRequest, "invalid request: client not using the websocket protocol", ""}
errHTTPBadRequestAttachmentURLInvalid = &errHTTP{40013, http.StatusBadRequest, "invalid request: attachment URL is invalid", "https://ntfy.sh/docs/publish/#attachments"}
errHTTPBadRequestAttachmentsDisallowed = &errHTTP{40014, http.StatusBadRequest, "invalid request: attachments not allowed", "https://ntfy.sh/docs/config/#attachments"}
errHTTPBadRequestAttachmentsExpiryBeforeDelivery = &errHTTP{40015, http.StatusBadRequest, "invalid request: attachment expiry before delayed delivery date", "https://ntfy.sh/docs/publish/#scheduled-delivery"}
errHTTPBadRequestWebSocketsUpgradeHeaderMissing = &errHTTP{40016, http.StatusBadRequest, "invalid request: client not using the websocket protocol", "https://ntfy.sh/docs/subscribe/api/#websockets"}
errHTTPBadRequestJSONInvalid = &errHTTP{40017, http.StatusBadRequest, "invalid request: request body must be message JSON", "https://ntfy.sh/docs/publish/#publish-as-json"}
errHTTPNotFound = &errHTTP{40401, http.StatusNotFound, "page not found", ""}
errHTTPUnauthorized = &errHTTP{40101, http.StatusUnauthorized, "unauthorized", "https://ntfy.sh/docs/publish/#authentication"}
errHTTPForbidden = &errHTTP{40301, http.StatusForbidden, "forbidden", "https://ntfy.sh/docs/publish/#authentication"}

20
server/server.go
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@ -263,8 +263,6 @@ func (s *Server) handle(w http.ResponseWriter, r *http.Request) {
func (s *Server) handleInternal(w http.ResponseWriter, r *http.Request, v *visitor) error {
if r.Method == http.MethodGet && r.URL.Path == "/" {
return s.handleHome(w, r)
} else if (r.Method == http.MethodPut || r.Method == http.MethodPost) && r.URL.Path == "/" {
return s.limitRequests(s.fromMessageJSON(s.authWrite(s.handlePublish)))(w, r, v)
} else if r.Method == http.MethodGet && r.URL.Path == "/example.html" {
return s.handleExample(w, r)
} else if r.Method == http.MethodHead && r.URL.Path == "/" {
@ -279,6 +277,8 @@ func (s *Server) handleInternal(w http.ResponseWriter, r *http.Request, v *visit
return s.limitRequests(s.handleFile)(w, r, v)
} else if r.Method == http.MethodOptions {
return s.handleOptions(w, r)
} else if (r.Method == http.MethodPut || r.Method == http.MethodPost) && r.URL.Path == "/" {
return s.limitRequests(s.transformBodyJSON(s.authWrite(s.handlePublish)))(w, r, v)
} else if (r.Method == http.MethodPut || r.Method == http.MethodPost) && topicPathRegex.MatchString(r.URL.Path) {
return s.limitRequests(s.authWrite(s.handlePublish))(w, r, v)
} else if r.Method == http.MethodGet && publishPathRegex.MatchString(r.URL.Path) {
@ -1095,7 +1095,9 @@ func (s *Server) limitRequests(next handleFunc) handleFunc {
}
}
func (s *Server) fromMessageJSON(next handleFunc) handleFunc {
// transformBodyJSON peaks the request body, reads the JSON, and converts it to headers
// before passing it on to the next handler. This is meant to be used in combination with handlePublish.
func (s *Server) transformBodyJSON(next handleFunc) handleFunc {
return func(w http.ResponseWriter, r *http.Request, v *visitor) error {
body, err := util.Peak(r.Body, s.config.MessageLimit)
if err != nil {
@ -1104,10 +1106,10 @@ func (s *Server) fromMessageJSON(next handleFunc) handleFunc {
defer r.Body.Close()
var m publishMessage
if err := json.NewDecoder(body).Decode(&m); err != nil {
return err
return errHTTPBadRequestJSONInvalid
}
if !topicRegex.MatchString(m.Topic) {
return errors.New("invalid message")
return errHTTPBadRequestTopicInvalid
}
if m.Message == "" {
m.Message = emptyMessageBody
@ -1117,11 +1119,11 @@ func (s *Server) fromMessageJSON(next handleFunc) handleFunc {
if m.Title != "" {
r.Header.Set("X-Title", m.Title)
}
if m.Priority != "" {
r.Header.Set("X-Priority", m.Priority)
if m.Priority != 0 {
r.Header.Set("X-Priority", fmt.Sprintf("%d", m.Priority))
}
if m.Tags != "" {
r.Header.Set("X-Tags", m.Tags)
if m.Tags != nil && len(m.Tags) > 0 {
r.Header.Set("X-Tags", strings.Join(m.Tags, ","))
}
if m.Attach != "" {
r.Header.Set("X-Attach", m.Attach)

25
server/server_test.go
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@ -862,6 +862,31 @@ func TestServer_PublishUnifiedPushText(t *testing.T) {
require.Equal(t, "this is a unifiedpush text message", m.Message)
}
func TestServer_PublishAsJSON(t *testing.T) {
s := newTestServer(t, newTestConfig(t))
body := `{"topic":"mytopic","message":"A message","title":"a title\nwith lines","tags":["tag1","tag 2"],` +
`"not-a-thing":"ok", "attach":"http://google.com","filename":"google.pdf", "click":"http://ntfy.sh","priority":4}`
response := request(t, s, "PUT", "/", body, nil)
require.Equal(t, 200, response.Code)
m := toMessage(t, response.Body.String())
require.Equal(t, "mytopic", m.Topic)
require.Equal(t, "A message", m.Message)
require.Equal(t, "a title\nwith lines", m.Title)
require.Equal(t, []string{"tag1", "tag 2"}, m.Tags)
require.Equal(t, "http://google.com", m.Attachment.URL)
require.Equal(t, "google.pdf", m.Attachment.Name)
require.Equal(t, "http://ntfy.sh", m.Click)
require.Equal(t, 4, m.Priority)
}
func TestServer_PublishAsJSON_Invalid(t *testing.T) {
s := newTestServer(t, newTestConfig(t))
body := `{"topic":"mytopic",INVALID`
response := request(t, s, "PUT", "/", body, nil)
require.Equal(t, 400, response.Code)
}
func TestServer_PublishAttachment(t *testing.T) {
content := util.RandomString(5000) // > 4096
s := newTestServer(t, newTestConfig(t))

16
server/types.go
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@ -44,14 +44,14 @@ type attachment struct {
// publishMessage is used as input when publishing as JSON
type publishMessage struct {
Topic string `json:"topic"`
Title string `json:"title"`
Message string `json:"message"`
Priority string `json:"priority"`
Tags string `json:"tags"`
Click string `json:"click"`
Attach string `json:"attach"`
Filename string `json:"filename"`
Topic string `json:"topic"`
Title string `json:"title"`
Message string `json:"message"`
Priority int `json:"priority"`
Tags []string `json:"tags"`
Click string `json:"click"`
Attach string `json:"attach"`
Filename string `json:"filename"`
}
// messageEncoder is a function that knows how to encode a message