Make web app work for updated notifications

Merge branch 'main' into update-messages
Try it a better way
2022-03-25 11:01:07 -04:00 · 2022-03-24 19:30:27 -04:00 · 2022-03-24 19:27:07 -04:00 · 2022-03-24 19:25:41 -04:00 · 2022-03-24 19:23:30 -04:00 · 2022-03-24 17:05:07 -04:00
23 changed files with 2613 additions and 1492 deletions
--- a/.goreleaser.yml
+++ b/.goreleaser.yml
@@ -4,7 +4,7 @@ before:
    - go mod tidy
 builds:
  -
-    id: ntfy
+    id: ntfy_amd64
    binary: ntfy
    env:
      - CGO_ENABLED=1 # required for go-sqlite3
--- a/195
+++ b/195
@@ -3,55 +3,87 @@ VERSION := $(shell git describe --tag)
 .PHONY:

 help:
-	@echo "Typical commands:"
-	@echo "  make check                       - Run all tests, vetting/formatting checks and linters"
-	@echo "  make fmt build-snapshot install  - Build latest and install to local system"
+	@echo "Typical commands (more see below):"
+	@echo "  make build                   - Build web app, documentation and server/client (sloowwww)"
+	@echo "  make server-amd64            - Build server/client binary (amd64, no web app or docs)"
+	@echo "  make install-amd64           - Install ntfy binary to /usr/bin/ntfy (amd64)"
+	@echo "  make web                     - Build the web app"
+	@echo "  make docs                    - Build the documentation"
+	@echo "  make check                   - Run all tests, vetting/formatting checks and linters"
+	@echo
+	@echo "Build everything:"
+	@echo "  make build                   - Build web app, documentation and server/client"
+	@echo "  make clean                   - Clean build/dist folders"
+	@echo
+	@echo "Build server & client (not release version):"
+	@echo "  make server                  - Build server & client (all architectures)"
+	@echo "  make server-amd64            - Build server & client (amd64 only)"
+	@echo "  make server-armv7            - Build server & client (armv7 only)"
+	@echo "  make server-arm64            - Build server & client (arm64 only)"
+	@echo
+	@echo "Build web app:"
+	@echo "  make web                     - Build the web app"
+	@echo "  make web-deps                - Install web app dependencies (npm install the universe)"
+	@echo "  make web-build               - Actually build the web app"
+	@echo
+	@echo "Build documentation:"
+	@echo "  make docs                    - Build the documentation"
+	@echo "  make docs-deps               - Install Python dependencies (pip3 install)"
+	@echo "  make docs-build              - Actually build the documentation"
 	@echo
 	@echo "Test/check:"
-	@echo "  make test                        - Run tests"
-	@echo "  make race                        - Run tests with -race flag"
-	@echo "  make coverage                    - Run tests and show coverage"
-	@echo "  make coverage-html               - Run tests and show coverage (as HTML)"
-	@echo "  make coverage-upload             - Upload coverage results to codecov.io"
+	@echo "  make test                    - Run tests"
+	@echo "  make race                    - Run tests with -race flag"
+	@echo "  make coverage                - Run tests and show coverage"
+	@echo "  make coverage-html           - Run tests and show coverage (as HTML)"
+	@echo "  make coverage-upload         - Upload coverage results to codecov.io"
 	@echo
 	@echo "Lint/format:"
-	@echo "  make fmt                         - Run 'go fmt'"
-	@echo "  make fmt-check                   - Run 'go fmt', but don't change anything"
-	@echo "  make vet                         - Run 'go vet'"
-	@echo "  make lint                        - Run 'golint'"
-	@echo "  make staticcheck                 - Run 'staticcheck'"
+	@echo "  make fmt                     - Run 'go fmt'"
+	@echo "  make fmt-check               - Run 'go fmt', but don't change anything"
+	@echo "  make vet                     - Run 'go vet'"
+	@echo "  make lint                    - Run 'golint'"
+	@echo "  make staticcheck             - Run 'staticcheck'"
 	@echo
-	@echo "Build:"
-	@echo "  make build                       - Build"
-	@echo "  make build-snapshot              - Build snapshot"
-	@echo "  make build-simple                - Build (using go build, without goreleaser)"
-	@echo "  make clean                       - Clean build folder"
-	@echo
-	@echo "Releasing (requires goreleaser):"
-	@echo "  make release                     - Create a release"
-	@echo "  make release-snapshot            - Create a test release"
+	@echo "Releasing:"
+	@echo "  make release                 - Create a release"
+	@echo "  make release-snapshot        - Create a test release"
 	@echo
 	@echo "Install locally (requires sudo):"
-	@echo "  make install                     - Copy binary from dist/ to /usr/bin"
-	@echo "  make install-deb                 - Install .deb from dist/"
-	@echo "  make install-lint                - Install golint"
+	@echo "  make install-amd64           - Copy amd64 binary from dist/ to /usr/bin/ntfy"
+	@echo "  make install-armv7           - Copy armv7 binary from dist/ to /usr/bin/ntfy"
+	@echo "  make install-arm64           - Copy arm64 binary from dist/ to /usr/bin/ntfy"
+	@echo "  make install-deb-amd64       - Install .deb from dist/ (amd64 only)"
+	@echo "  make install-deb-armv7       - Install .deb from dist/ (armv7 only)"
+	@echo "  make install-deb-arm64       - Install .deb from dist/ (arm64 only)"
+
+
+# Building everything
+
+clean: .PHONY
+	rm -rf dist build server/docs server/site
+
+build: web docs server


 # Documentation

+docs: docs-deps docs-build
+
 docs-deps: .PHONY
 	pip3 install -r requirements.txt

-docs: docs-deps
+docs-build: .PHONY
 	mkdocs build


 # Web app

+web: web-deps web-build
+
 web-deps:
-	cd web \
-		&& npm install \
-		&& node_modules/svgo/bin/svgo src/img/*.svg
+	cd web && npm install
+	# If this fails for .svg files, optimizes them with svgo

 web-build:
 	cd web \
@@ -63,7 +95,37 @@ web-build:
 			../server/site/config.js \
 			../server/site/asset-manifest.json

-web: web-deps web-build
+
+# Main server/client build
+
+server: server-deps
+	goreleaser build --snapshot --rm-dist --debug
+
+server-amd64: server-deps-static-sites
+	goreleaser build --snapshot --rm-dist --debug --id ntfy_amd64
+
+server-armv7: server-deps-static-sites server-deps-gcc-armv7
+	goreleaser build --snapshot --rm-dist --debug --id ntfy_armv7
+
+server-arm64: server-deps-static-sites server-deps-gcc-arm64
+	goreleaser build --snapshot --rm-dist --debug --id ntfy_arm64
+
+server-deps: server-deps-static-sites server-deps-all server-deps-gcc
+
+server-deps-gcc: server-deps-gcc-armv7 server-deps-gcc-arm64
+
+server-deps-static-sites:
+	mkdir -p server/docs server/site
+	touch server/docs/index.html server/site/app.html
+
+server-deps-all:
+	which upx || { echo "ERROR: upx not installed. On Ubuntu, run: apt install upx"; exit 1; }
+
+server-deps-gcc-armv7:
+	which arm-linux-gnueabi-gcc || { echo "ERROR: ARMv7 cross compiler not installed. On Ubuntu, run: apt install gcc-arm-linux-gnueabi"; exit 1; }
+
+server-deps-gcc-arm64:
+	which aarch64-linux-gnu-gcc || { echo "ERROR: ARM64 cross compiler not installed. On Ubuntu, run: apt install gcc-aarch64-linux-gnu"; exit 1; }


 # Test/check targets
@@ -114,64 +176,51 @@ staticcheck: .PHONY
 	rm -rf build/staticcheck


-# Building targets
-
-build-deps: docs web
-	which arm-linux-gnueabi-gcc || { echo "ERROR: ARMv6/v7 cross compiler not installed. On Ubuntu, run: apt install gcc-arm-linux-gnueabi"; exit 1; }
-	which aarch64-linux-gnu-gcc || { echo "ERROR: ARM64 cross compiler not installed. On Ubuntu, run: apt install gcc-aarch64-linux-gnu"; exit 1; }
-
-build: build-deps
-	goreleaser build --rm-dist --debug
-
-build-snapshot: build-deps
-	goreleaser build --snapshot --rm-dist --debug
-
-build-simple: clean
-	mkdir -p dist/ntfy_linux_amd64 server/docs server/site
-	touch server/docs/index.html
-	touch server/site/app.html
-	export CGO_ENABLED=1
-	go build \
-		-o dist/ntfy_linux_amd64/ntfy \
-		-tags sqlite_omit_load_extension,osusergo,netgo \
-		-ldflags \
-		"-linkmode=external -extldflags=-static -s -w -X main.version=$(VERSION) -X main.commit=$(shell git rev-parse --short HEAD) -X main.date=$(shell date +%s)"
-
-clean: .PHONY
-	rm -rf dist build server/docs server/site
-
-
 # Releasing targets

+release: release-deps
+	goreleaser release --rm-dist --debug
+
+release-snapshot: release-deps
+	goreleaser release --snapshot --skip-publish --rm-dist --debug
+
+release-deps: clean server-deps release-check-tags docs web check
+
 release-check-tags:
 	$(eval LATEST_TAG := $(shell git describe --abbrev=0 --tags | cut -c2-))
 	if ! grep -q $(LATEST_TAG) docs/install.md; then\
 	 	echo "ERROR: Must update docs/install.md with latest tag first.";\
 	 	exit 1;\
 	fi
-	if grep -q XXXXX docs/releases.md; then\
-		echo "ERROR: Must update docs/releases.md, found XXXXX.";\
-		exit 1;\
-	fi
 	if ! grep -q $(LATEST_TAG) docs/releases.md; then\
-		echo "ERROR: Must update docs/releases.mdwith latest tag first.";\
+		echo "ERROR: Must update docs/releases.md with latest tag first.";\
 		exit 1;\
 	fi

-release: build-deps release-check-tags check
-	goreleaser release --rm-dist --debug
-
-release-snapshot: build-deps
-	goreleaser release --snapshot --skip-publish --rm-dist --debug
-

 # Installing targets

-install:
-	sudo rm -f /usr/bin/ntfy
-	sudo cp -a dist/ntfy_linux_amd64/ntfy /usr/bin/ntfy
+install-amd64: remove-binary
+	sudo cp -a dist/ntfy_amd64_linux_amd64/ntfy /usr/bin/ntfy

-install-deb:
+install-armv7: remove-binary
+	sudo cp -a dist/ntfy_armv7_linux_armv7/ntfy /usr/bin/ntfy
+
+install-arm64: remove-binary
+	sudo cp -a dist/ntfy_arm64_linux_arm64/ntfy /usr/bin/ntfy
+
+remove-binary:
+	sudo rm -f /usr/bin/ntfy
+
+install-amd64-deb: purge-package
+	sudo dpkg -i dist/ntfy_*_linux_amd64.deb
+
+install-armv7-deb: purge-package
+	sudo dpkg -i dist/ntfy_*_linux_armv7.deb
+
+install-arm64-deb: purge-package
+	sudo dpkg -i dist/ntfy_*_linux_arm64.deb
+
+purge-package:
 	sudo systemctl stop ntfy || true
 	sudo apt-get purge ntfy || true
-	sudo dpkg -i dist/ntfy_*_linux_amd64.deb
--- a/docs/develop.md
+++ b/docs/develop.md
@@ -1,51 +1,287 @@
-# Building
+# Development
+Hurray 🥳 🎉, you are interested in writing code for ntfy! **That's awesome.** 😎
+
+I tried my very best to write up detailed instructions, but if at any point in time you run into issues, don't 
+hesitate to **contact me on [Discord](https://discord.gg/cT7ECsZj9w) or [Matrix](https://matrix.to/#/#ntfy:matrix.org)**.

 ## ntfy server
-The ntfy server source code is available [on GitHub](https://github.com/binwiederhier/ntfy). 
-To quickly build on amd64, you can use `make build-simple`:
+The ntfy server source code is available [on GitHub](https://github.com/binwiederhier/ntfy). The codebase for the
+server consists of three components:

-```
-git clone git@github.com:binwiederhier/ntfy.git
-cd ntfy
-make build-simple
+* **The main server/client** is written in [Go](https://go.dev/) (so you'll need Go). Its main entrypoint is at 
+  [main.go](https://github.com/binwiederhier/ntfy/blob/main/main.go), and the meat you're likely interested in is 
+  in [server.go](https://github.com/binwiederhier/ntfy/blob/main/server/server.go). Notably, the server uses a 
+  [SQLite](https://sqlite.org) library called [go-sqlite3](https://github.com/mattn/go-sqlite3), which requires 
+  [Cgo](https://go.dev/blog/cgo) and `CGO_ENABLED=1` to be set. Otherwise things will not work (see below).
+* **The documentation** is generated by [MkDocs](https://www.mkdocs.org/) and [Material for MkDocs](https://squidfunk.github.io/mkdocs-material/),
+  which is written in [Python](https://www.python.org/). You'll need Python and MkDocs (via `pip`) only if you want to
+  build the docs.
+* **The web app** is written in [React](https://reactjs.org/), using [MUI](https://mui.com/). It uses [Create React App](https://create-react-app.dev/)
+  to build the production build. If you want to modify the web app, you need [nodejs](https://nodejs.org/en/) (for `npm`) 
+  and install all the 100,000 dependencies (*sigh*).
+
+All of these components are built and then **baked into one binary**. 
+
+### Navigating the code
+Code:
+
+* [main.go](https://github.com/binwiederhier/ntfy/blob/main/main.go) - Main entrypoint into the CLI, for both server and client
+* [cmd/](https://github.com/binwiederhier/ntfy/tree/main/cmd) - CLI commands, such as `serve` or `publish`
+* [server/](https://github.com/binwiederhier/ntfy/tree/main/server) - The meat of the server logic
+* [docs/](https://github.com/binwiederhier/ntfy/tree/main/docs) - The [MkDocs](https://www.mkdocs.org/) documentation, also see `mkdocs.yml`
+* [web/](https://github.com/binwiederhier/ntfy/tree/main/web) - The [React](https://reactjs.org/) application, also see `web/package.json`
+
+Build related:
+
+* [Makefile](https://github.com/binwiederhier/ntfy/blob/main/Makefile) - Main entrypoint for all things related to building
+* [.goreleaser.yml](https://github.com/binwiederhier/ntfy/blob/main/.goreleaser.yml) - Describes all build outputs (for [GoReleaser](https://goreleaser.com/))
+* [go.mod](https://github.com/binwiederhier/ntfy/blob/main/go.mod) - Go modules dependency file
+* [mkdocs.yml](https://github.com/binwiederhier/ntfy/blob/main/mkdocs.yml) - Config file for the docs (for [MkDocs](https://www.mkdocs.org/))
+* [web/package.json](https://github.com/binwiederhier/ntfy/blob/main/web/package.json) - Build and dependency file for web app (for npm)
+
+
+The `web/` and `docs/` folder are the sources for web app and documentation. During the build process,
+the generated output is copied to `server/site` (web app and landing page) and `server/docs` (documentation).
+
+### Build requirements
+
+* [Go](https://go.dev/) (required for main server)
+* [gcc](https://gcc.gnu.org/) (required main server, for SQLite cgo-based bindings)
+* [Make](https://www.gnu.org/software/make/) (required for convenience)
+* [libsqlite3/libsqlite3-dev](https://www.sqlite.org/) (required for main server, for SQLite cgo-based bindings)
+* [GoReleaser](https://goreleaser.com/) (required for a proper main server build)
+* [Python](https://www.python.org/) (for `pip`, only to build the docs) 
+* [nodejs](https://nodejs.org/en/) (for `npm`, only to build the web app)
+
+### Install dependencies
+These steps **assume Ubuntu**. Steps may vary on different Linux distributions.
+
+First, install [Go](https://go.dev/) (see [official instructions](https://go.dev/doc/install)):
+``` shell
+wget https://go.dev/dl/go1.18.linux-amd64.tar.gz
+rm -rf /usr/local/go && tar -C /usr/local -xzf go1.18.linux-amd64.tar.gz
+export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin
+go version   # verifies that it worked
 ```

-That'll generate a statically linked binary in `dist/ntfy_linux_amd64/ntfy`.
-
-For all other platforms (including Docker), and for production or other snapshot builds, you should use the amazingly 
-awesome [GoReleaser](https://goreleaser.com/) make targets:
-
-```
-Build:
-  make build                       - Build
-  make build-snapshot              - Build snapshot
-  make build-simple                - Build (using go build, without goreleaser)
-  make clean                       - Clean build folder
-
-Releasing (requires goreleaser):
-  make release                     - Create a release
-  make release-snapshot            - Create a test release
+Install [GoReleaser](https://goreleaser.com/) (see [official instructions](https://goreleaser.com/install/)):
+``` shell
+go install github.com/goreleaser/goreleaser@latest
+goreleaser -v   # verifies that it worked
 ```

-There are currently no platform-specific make targets, so they will build for all platforms (which may take a while).
+Install [nodejs](https://nodejs.org/en/) (see [official instructions](https://nodejs.org/en/download/package-manager/)):
+``` shell
+curl -fsSL https://deb.nodesource.com/setup_17.x | sudo -E bash -
+sudo apt-get install -y nodejs
+npm -v   # verifies that it worked
+```
+
+Then install a few other things required:
+``` shell
+sudo apt install \
+    build-essential \
+    libsqlite3-dev \
+    gcc-arm-linux-gnueabi \
+    gcc-aarch64-linux-gnu \
+    python3-pip \
+    upx \
+    git
+```
+
+### Check out code
+Now check out via git from the [GitHub repository](https://github.com/binwiederhier/ntfy):
+
+=== "via HTTPS"
+    ``` shell
+    git clone https://github.com/binwiederhier/ntfy.git
+    cd ntfy
+    ```
+
+=== "via SSH"
+    ``` shell
+    git clone git@github.com:binwiederhier/ntfy.git 
+    cd ntfy
+    ```
+
+### Build all the things
+Now you can finally build everything. There are tons of `make` targets, so maybe just review what's there first 
+by typing `make`:
+
+``` shell
+$ make 
+Typical commands (more see below):
+  make build                   - Build web app, documentation and server/client (sloowwww)
+  make server-amd64            - Build server/client binary (amd64, no web app or docs)
+  make install-amd64           - Install ntfy binary to /usr/bin/ntfy (amd64)
+  make web                     - Build the web app
+  make docs                    - Build the documentation
+  make check                   - Run all tests, vetting/formatting checks and linters
+...
+```
+
+If you want to build the **ntfy binary including web app and docs for all supported architectures** (amd64, armv7, and amd64), 
+you can simply run `make build`:
+
+``` shell
+$ make build
+...
+# This builds web app, docs, and the ntfy binary (for amd64, armv7 and arm64). 
+# This will be SLOW (5+ minutes on my laptop on the first run). Maybe look at the other make targets?
+```
+
+You'll see all the outputs in the `dist/` folder afterwards:
+
+``` bash
+$ find dist 
+dist
+dist/metadata.json
+dist/ntfy_arm64_linux_arm64
+dist/ntfy_arm64_linux_arm64/ntfy
+dist/ntfy_armv7_linux_arm_7
+dist/ntfy_armv7_linux_arm_7/ntfy
+dist/ntfy_amd64_linux_amd64
+dist/ntfy_amd64_linux_amd64/ntfy
+dist/config.yaml
+dist/artifacts.json
+```
+
+If you also want to build the **Debian/RPM packages and the Docker images for all supported architectures**, you can 
+use the `make release-snapshot` target:
+
+``` shell
+$ make release-snapshot
+...
+# This will be REALLY SLOW (sometimes 5+ minutes on my laptop)
+```
+
+During development, you may want to be more picky and build only certain things. Here are a few examples.
+
+### Build the ntfy binary
+To build only the `ntfy` binary **without the web app or documentation**, use the `make server-...` targets:
+
+``` shell
+$ make
+Build server & client (not release version):
+  make server                  - Build server & client (all architectures)
+  make server-amd64            - Build server & client (amd64 only)
+  make server-armv7            - Build server & client (armv7 only)
+  make server-arm64            - Build server & client (arm64 only)
+```
+
+So if you're on an amd64/x86_64-based machine, you may just want to run `make server-amd64` during testing. On a modern
+system, this shouldn't take longer than 5-10 seconds. I often combine it with `install-amd64` so I can run the binary
+right away:
+
+``` shell
+$ make server-amd64 install-amd64
+$ ntfy serve
+```
+
+**During development of the main app, you can also just use `go run main.go`**, as long as you run 
+`make server-deps-static-sites`at least once and `CGO_ENABLED=1`:
+
+``` shell
+$ export CGO_ENABLED=1
+$ make server-deps-static-sites
+$ go run main.go serve
+2022/03/18 08:43:55 Listening on :2586[http]
+...
+```
+
+If you don't run `server-deps-static-sites`, you may see an error *`pattern ...: no matching files found`*:
+```
+$ go run main.go serve
+server/server.go:85:13: pattern docs: no matching files found
+```
+
+This is because we use `go:embed` to embed the documentation and web app, so the Go code expects files to be
+present at `server/docs` and `server/site`. If they are not, you'll see the above error. The `server-deps-static-sites`
+target creates dummy files that ensures that you'll be able to build.
+
+
+### Build the web app
+The sources for the web app live in `web/`. As long as you have `npm` installed (see above), building the web app 
+is really simple. Just type `make web` and you're in business:
+
+``` shell
+$ make web
+...
+```
+
+This will build the web app using Create React App and then **copy the production build to the `server/site` folder**, so 
+that when you `make server` (or `make server-amd64`, ...), you will have the web app included in the `ntfy` binary.
+
+If you're developing on the web app, it's best to just `cd web` and run `npm start` manually. This will open your browser
+at `http://127.0.0.1:3000` with the web app, and as you edit the source files, they will be recompiled and the browser 
+will automatically refresh:
+
+``` shell
+$ cd web
+$ npm start
+```
+
+### Build the docs
+The sources for the docs live in `docs/`. Similarly to the web app, you can simply run `make docs` to build the 
+documentation. As long as you have `mkdocs` installed (see above), this should work fine:
+
+``` shell
+$ make docs
+...
+```
+
+If you are changing the documentation, you should be running `mkdocs serve` directly. This will build the documentation, 
+serve the files at `http://127.0.0.1:8000/`, and rebuild every time you save the source files: 
+
+```
+$ mkdocs serve
+INFO     -  Building documentation...
+INFO     -  Cleaning site directory
+INFO     -  Documentation built in 5.53 seconds
+INFO     -  [16:28:14] Serving on http://127.0.0.1:8000/
+```
+
+Then you can navigate to http://127.0.0.1:8000/ and whenever you change a markdown file in your text editor it'll automatically update.

 ## Android app
 The ntfy Android app source code is available [on GitHub](https://github.com/binwiederhier/ntfy-android).
 The Android app has two flavors:

-* **Google Play:** The `play` flavor includes Firebase (FCM) and requires a Firebase account
+* **Google Play:** The `play` flavor includes [Firebase (FCM)](https://firebase.google.com/) and requires a Firebase account
 * **F-Droid:** The `fdroid` flavor does not include Firebase or Google dependencies

+### Navigating the code
+* [main/](https://github.com/binwiederhier/ntfy-android/tree/main/app/src/main) - Main Android app source code
+* [play/](https://github.com/binwiederhier/ntfy-android/tree/main/app/src/play) - Google Play / Firebase specific code
+* [fdroid/](https://github.com/binwiederhier/ntfy-android/tree/main/app/src/fdroid) - F-Droid Firebase stubs
+* [build.gradle](https://github.com/binwiederhier/ntfy-android/blob/main/app/build.gradle) - Main build file
+
+### IDE/Environment
+You should download [Android Studio](https://developer.android.com/studio) (or [IntelliJ IDEA](https://www.jetbrains.com/idea/) 
+with the relevant Android plugins). Everything else will just be a pain for you. Do yourself a favor. 😀 
+
+### Check out the code
 First check out the repository:

-```
-git clone git@github.com:binwiederhier/ntfy-android.git
-cd ntfy-android
-```
+=== "via HTTPS"
+    ``` shell
+    git clone https://github.com/binwiederhier/ntfy-android.git
+    cd ntfy-android
+    ```
+
+=== "via SSH"
+    ``` shell
+    git clone git@github.com:binwiederhier/ntfy-android.git
+    cd ntfy-android
+    ```

 Then either follow the steps for building with or without Firebase.

-### Building without Firebase (F-Droid flavor)
+### Build F-Droid flavor (no FCM)
+!!! info
+    I do build the ntfy Android app using IntelliJ IDEA (Android Studio), so I don't know if these Gradle commands will
+    work without issues. Please give me feedback if it does/doesn't work for you.
+
 Without Firebase, you may want to still change the default `app_base_url` in [strings.xml](https://github.com/binwiederhier/ntfy-android/blob/main/app/src/main/res/values/strings.xml)
 if you're self-hosting the server. Then run:
 ```
@@ -56,8 +292,13 @@ if you're self-hosting the server. Then run:
 ./gradlew bundleFdroidRelease
 ```

-### Building with Firebase (FCM, Google Play flavor)
+### Build Play flavor (FCM)
+!!! info
+    I do build the ntfy Android app using IntelliJ IDEA (Android Studio), so I don't know if these Gradle commands will
+    work without issues. Please give me feedback if it does/doesn't work for you.
+
 To build your own version with Firebase, you must:
+
 * Create a Firebase/FCM account
 * Place your account file at `app/google-services.json`
 * And change `app_base_url` in [strings.xml](https://github.com/binwiederhier/ntfy-android/blob/main/app/src/main/res/values/strings.xml)
--- a/docs/examples.md
+++ b/docs/examples.md
@@ -124,3 +124,218 @@ GitHub have been hopeless. In case it ever becomes available, I want to know imm
 */6 * * * * if curl -s https://api.github.com/users/ntfy | grep "Not Found"; then curl -d "github.com/ntfy is available" -H "Tags: tada" -H "Prio: high" ntfy.sh/my-alerts; fi
 ~           
 ```
+
+## Download notifications (Sonarr, Radarr, Lidarr, Readarr, Prowlarr, SABnzbd)
+It's possible to use custom scripts for all the *arr services, plus SABnzbd. Notifications for downloads, warnings, grabs etc.
+Some simple bash scripts to achieve this are kindly provided in [nickexyz's repository](https://github.com/nickexyz/ntfy-shellscripts). 
+
+## Node-RED
+You can use the HTTP request node to send messages with [Node-RED](https://nodered.org), some examples:
+
+<details>
+<summary>Example: Send a message</summary>
+
+```
+[
+  {
+    "id": "8f09d37dd5773f88",
+    "type": "http request",
+    "z": "ff3ad4e1.d3415",
+    "name": "ntfy",
+    "method": "POST",
+    "ret": "txt",
+    "paytoqs": "ignore",
+    "url": "https://example.com/topic",
+    "tls": "",
+    "persist": false,
+    "proxy": "",
+    "authType": "",
+    "senderr": false,
+    "credentials": {},
+    "x": 1410,
+    "y": 740,
+    "wires": [
+      []
+    ]
+  },
+  {
+    "id": "2603f296b25fe351",
+    "type": "function",
+    "z": "ff3ad4e1.d3415",
+    "name": "data",
+    "func": "msg.payload = \"Something happened\";\nmsg.headers = {};\nmsg.headers['tags'] = 'house';\nmsg.headers['X-Title'] = 'Home Assistant';\n\nreturn msg;",
+    "outputs": 1,
+    "noerr": 0,
+    "initialize": "",
+    "finalize": "",
+    "libs": [],
+    "x": 1290,
+    "y": 740,
+    "wires": [
+      [
+        "8f09d37dd5773f88"
+      ]
+    ]
+  },
+  {
+    "id": "d2351ed0720a239f",
+    "type": "inject",
+    "z": "ff3ad4e1.d3415",
+    "name": "Manual start",
+    "props": [
+      {
+        "p": "payload"
+      },
+      {
+        "p": "topic",
+        "vt": "str"
+      }
+    ],
+    "repeat": "",
+    "crontab": "",
+    "once": false,
+    "onceDelay": "20",
+    "topic": "",
+    "payload": "",
+    "payloadType": "date",
+    "x": 1150,
+    "y": 740,
+    "wires": [
+      [
+        "2603f296b25fe351"
+      ]
+    ]
+  }
+]
+```
+
+</details>
+
+<details>
+<summary>Example: Send a picture</summary>
+
+```
+[
+  {
+    "id": "726d0d75d6c0f70e",
+    "type": "http request",
+    "z": "ff3ad4e1.d3415",
+    "name": "Download jpeg",
+    "method": "GET",
+    "ret": "bin",
+    "paytoqs": "ignore",
+    "url": "https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png",
+    "tls": "",
+    "persist": false,
+    "proxy": "",
+    "authType": "",
+    "senderr": false,
+    "credentials": {},
+    "x": 1320,
+    "y": 780,
+    "wires": [
+      [
+        "730dbbc9dbf1ed8a"
+      ]
+    ]
+  },
+  {
+    "id": "730dbbc9dbf1ed8a",
+    "type": "function",
+    "z": "ff3ad4e1.d3415",
+    "name": "data",
+    "func": "msg.payload = msg.payload;\nmsg.headers = {};\nmsg.headers['tags'] = 'house';\nmsg.headers['X-Title'] = 'Home Assistant - Picture';\n\nreturn msg;",
+    "outputs": 1,
+    "noerr": 0,
+    "initialize": "",
+    "finalize": "",
+    "libs": [],
+    "x": 1470,
+    "y": 780,
+    "wires": [
+      [
+        "592f424b37f76f5c"
+      ]
+    ]
+  },
+  {
+    "id": "592f424b37f76f5c",
+    "type": "http request",
+    "z": "ff3ad4e1.d3415",
+    "name": "ntfy",
+    "method": "PUT",
+    "ret": "bin",
+    "paytoqs": "ignore",
+    "url": "https://example.com/topic",
+    "tls": "",
+    "persist": false,
+    "proxy": "",
+    "authType": "",
+    "senderr": false,
+    "x": 1590,
+    "y": 780,
+    "wires": [
+      []
+    ]
+  },
+  {
+    "id": "8aa06dda3c902f6a",
+    "type": "inject",
+    "z": "ff3ad4e1.d3415",
+    "name": "Manual start",
+    "props": [
+      {
+        "p": "payload"
+      },
+      {
+        "p": "topic",
+        "vt": "str"
+      }
+    ],
+    "repeat": "",
+    "crontab": "",
+    "once": false,
+    "onceDelay": "20",
+    "topic": "",
+    "payload": "",
+    "payloadType": "date",
+    "x": 1150,
+    "y": 780,
+    "wires": [
+      [
+        "726d0d75d6c0f70e"
+      ]
+    ]
+  }
+]
+```
+
+</details>
+
+## Gatus service health check
+
+An example for a custom alert with <a href="https://github.com/TwiN/gatus">Gatus</a>
+```
+alerting:
+  custom:
+    url: "https://ntfy.sh"
+    method: "POST"
+    body: |
+      {
+        "topic": "mytopic",
+        "message": "[ENDPOINT_NAME] - [ALERT_DESCRIPTION]",
+        "title": "Gatus",
+        "tags": ["[ALERT_TRIGGERED_OR_RESOLVED]"],
+        "priority": 3
+      }
+    default-alert:
+      enabled: true
+      description: "health check failed"
+      send-on-resolved: true
+      failure-threshold: 3
+      success-threshold: 3
+    placeholders:
+      ALERT_TRIGGERED_OR_RESOLVED:
+        TRIGGERED: "warning"
+        RESOLVED: "white_check_mark"
+```
--- a/docs/install.md
+++ b/docs/install.md
@@ -26,23 +26,29 @@ deb/rpm packages.

 === "x86_64/amd64"
    ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_x86_64.tar.gz
-    sudo tar -C /usr/bin -zxf ntfy_*.tar.gz ntfy
-    sudo ./ntfy serve
+    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_x86_64.tar.gz
+    tar zxvf ntfy_1.18.1_linux_x86_64.tar.gz
+    sudo cp -a ntfy_1.18.1_linux_x86_64/ntfy /usr/bin/ntfy
+    sudo mkdir /etc/ntfy && sudo cp ntfy_1.18.1_linux_x86_64/{client,server}/*.yml /etc/ntfy
+    sudo ntfy serve
    ```

 === "armv7/armhf"
    ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_armv7.tar.gz
-    sudo tar -C /usr/bin -zxf ntfy_*.tar.gz ntfy
-    sudo ./ntfy serve
+    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_armv7.tar.gz
+    tar zxvf ntfy_1.18.1_linux_armv7.tar.gz
+    sudo cp -a ntfy_1.18.1_linux_armv7/ntfy /usr/bin/ntfy
+    sudo mkdir /etc/ntfy && sudo cp ntfy_1.18.1_linux_armv7/{client,server}/*.yml /etc/ntfy
+    sudo ntfy serve
    ```

 === "arm64"
    ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_arm64.tar.gz
-    sudo tar -C /usr/bin -zxf ntfy_*.tar.gz ntfy
-    sudo ./ntfy serve
+    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_arm64.tar.gz
+    tar zxvf ntfy_1.18.1_linux_arm64.tar.gz
+    sudo cp -a ntfy_1.18.1_linux_arm64/ntfy /usr/bin/ntfy
+    sudo mkdir /etc/ntfy && sudo cp ntfy_1.18.1_linux_arm64/{client,server}/*.yml /etc/ntfy
+    sudo ntfy serve
    ```

 ## Debian/Ubuntu repository
@@ -88,7 +94,7 @@ Manually installing the .deb file:

 === "x86_64/amd64"
    ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_amd64.deb
+    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_amd64.deb
    sudo dpkg -i ntfy_*.deb
    sudo systemctl enable ntfy
    sudo systemctl start ntfy
@@ -96,7 +102,7 @@ Manually installing the .deb file:

 === "armv7/armhf"
    ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_armv7.deb
+    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_armv7.deb
    sudo dpkg -i ntfy_*.deb
    sudo systemctl enable ntfy
    sudo systemctl start ntfy
@@ -104,7 +110,7 @@ Manually installing the .deb file:

 === "arm64"
    ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_arm64.deb
+    wget https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_arm64.deb
    sudo dpkg -i ntfy_*.deb
    sudo systemctl enable ntfy
    sudo systemctl start ntfy
@@ -114,21 +120,21 @@ Manually installing the .deb file:

 === "x86_64/amd64"
    ```bash
-    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_amd64.rpm
+    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_amd64.rpm
    sudo systemctl enable ntfy 
    sudo systemctl start ntfy
    ```

 === "armv7/armhf"
    ```bash
-    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_armv7.rpm
+    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_armv7.rpm
    sudo systemctl enable ntfy 
    sudo systemctl start ntfy
    ```

 === "arm64"
    ```bash
-    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.18.0/ntfy_1.18.0_linux_arm64.rpm
+    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.18.1/ntfy_1.18.1_linux_arm64.rpm
    sudo systemctl enable ntfy 
    sudo systemctl start ntfy
    ```
--- a/docs/publish.md
+++ b/docs/publish.md
@@ -36,6 +36,11 @@ Here's an example showing how to publish a simple message using a POST request:
        strings.NewReader("Backup successful 😀"))
    ```

+=== "PowerShell"
+    ``` powershell
+    Invoke-RestMethod -Method 'Post' -Uri https://ntfy.sh/topic -Body "Backup successful 😀" -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/mytopic", 
@@ -117,6 +122,16 @@ a [title](#message-title), and [tag messages](#tags-emojis) 🥳 🎉. Here's an
 	http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/phil_alerts"
+    $headers = @{ Title="Unauthorized access detected"
+                  Priority="urgent"
+                  Tags="warning,skull" }
+    $body = "Remote access to phils-laptop detected. Act right away."              
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Headers $headers -Body $body -UseBasicParsing
+    ```
+    
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/phil_alerts",
@@ -191,6 +206,14 @@ you can set the `X-Title` header (or any of its aliases: `Title`, `ti`, or `t`).
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/controversial"
+    $headers = @{ Title="Dogs are better than cats" }
+    $body = "Oh my ..."
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Headers $headers -Body $body -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/controversial",
@@ -222,13 +245,13 @@ notification sounds and vibration patterns on your phone to map to these priorit

 The following priorities exist:

-| Priority | Icon | ID | Name | Description |
-|---|---|---|---|---|
-| Max priority | ![min priority](static/img/priority-5.svg) | `5` | `max`/`urgent` | Really long vibration bursts, default notification sound with a pop-over notification. |
-| High priority | ![min priority](static/img/priority-4.svg) | `4` | `high` | Long vibration burst, default notification sound with a pop-over notification. |
-| **Default priority** | *(none)* | `3` | `default` | Short default vibration and sound. Default notification behavior. |
-| Low priority | ![min priority](static/img/priority-2.svg) |`2` | `low` | No vibration or sound. Notification will not visibly show up until notification drawer is pulled down. |
-| Min priority | ![min priority](static/img/priority-1.svg) | `1` | `min` | No vibration or sound. The notification will be under the fold in "Other notifications". |
+| Priority             | Icon                                       | ID  | Name           | Description                                                                                            |
+|----------------------|--------------------------------------------|-----|----------------|--------------------------------------------------------------------------------------------------------|
+| Max priority         | ![min priority](static/img/priority-5.svg) | `5` | `max`/`urgent` | Really long vibration bursts, default notification sound with a pop-over notification.                 |
+| High priority        | ![min priority](static/img/priority-4.svg) | `4` | `high`         | Long vibration burst, default notification sound with a pop-over notification.                         |
+| **Default priority** | *(none)*                                   | `3` | `default`      | Short default vibration and sound. Default notification behavior.                                      |
+| Low priority         | ![min priority](static/img/priority-2.svg) | `2` | `low`          | No vibration or sound. Notification will not visibly show up until notification drawer is pulled down. |
+| Min priority         | ![min priority](static/img/priority-1.svg) | `1` | `min`          | No vibration or sound. The notification will be under the fold in "Other notifications".               |

 You can set the priority with the header `X-Priority` (or any of its aliases: `Priority`, `prio`, or `p`).

@@ -271,6 +294,14 @@ You can set the priority with the header `X-Priority` (or any of its aliases: `P
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/phil_alerts"
+    $headers = @{ Priority="5" }
+    $body = "An urgent message"
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Headers $headers -Body $body -UseBasicParsing
+    ```
+    
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/phil_alerts",
@@ -382,6 +413,14 @@ them with a comma, e.g. `tag1,tag2,tag3`.
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/backups"
+    $headers = @{ Tags="warning,mailsrv13,daily-backup" }
+    $body = "Backup of mailsrv13 failed"
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Headers $headers -Body $body -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/backups",
@@ -464,6 +503,14 @@ to be delivered in 3 days, it'll remain in the cache for 3 days and 12 hours. Al
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/hello"
+    $headers = @{ At="tomorrow, 10am" }
+    $body = "Good morning"
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Headers $headers -Body $body -UseBasicParsing
+    ```
+    
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/hello",
@@ -538,6 +585,11 @@ For instance, assuming your topic is `mywebhook`, you can simply call `/mywebhoo
    http.Get("https://ntfy.sh/mywebhook/trigger")
    ```

+=== "PowerShell"
+    ``` powershell
+    Invoke-RestMethod -Method 'Get' -Uri "ntfy.sh/mywebhook/trigger"
+    ```    
+
 === "Python"
    ``` python
    requests.get("https://ntfy.sh/mywebhook/trigger")
@@ -582,6 +634,11 @@ Here's an example with a custom message, tags and a priority:
    http.Get("https://ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull")
    ```

+=== "PowerShell"
+    ``` powershell
+    Invoke-RestMethod -Method 'Get' -Uri "ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull"
+    ```
+
 === "Python"
    ``` python
    requests.get("https://ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull")
@@ -675,6 +732,22 @@ Here's an example using all supported parameters. The `topic` parameter is the o
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh"
+    $body = @{
+            "topic"="powershell"
+            "title"="Low disk space alert"
+            "message"="Disk space is low at 5.1 GB"
+            "priority"=4
+            "attach"="https://filesrv.lan/space.jpg"
+            "filename"="diskspace.jpg"
+            "tags"=@("warning","cd")
+            "click"= "https://homecamera.lan/xasds1h2xsSsa/"
+          } | ConvertTo-Json
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Body $body -ContentType "application/json" -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/",
@@ -774,6 +847,14 @@ Here's an example that will open Reddit when the notification is clicked:
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/reddit_alerts"
+    $headers = @{ Click="https://www.reddit.com/message/messages" }
+    $body = "New messages on Reddit"
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Headers $headers -Body $body -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/reddit_alerts",
@@ -936,6 +1017,13 @@ Here's an example showing how to attach an APK file:
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/mydownloads"
+    $headers = @{ Attach="https://f-droid.org/F-Droid.apk" }
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Headers $headers -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.put("https://ntfy.sh/mydownloads",
@@ -1025,6 +1113,17 @@ that, your IP address appears in the e-mail body. This is to prevent abuse.
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/alerts"
+    $headers = @{ Title"="Low disk space alert"
+                  Priority="high"
+                  Tags="warning,skull,backup-host,ssh-login")
+                  Email="phil@example.com" }
+    $body = "Unknown login from 5.31.23.83 to backups.example.com"
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Body $body -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/alerts",
@@ -1135,6 +1234,14 @@ Here's a simple example:
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.example.com/mysecrets"
+    $headers = @{ Authorization="Basic cGhpbDpteXBhc3M=" }
+    $body = "Look ma, with auth"
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Body $body -Headers $headers -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.example.com/mysecrets",
@@ -1210,6 +1317,14 @@ are still delivered to connected subscribers, but [`since=`](subscribe/api.md#fe
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/mytopic"
+    $headers = @{ Cache="no" }
+    $body = "This message won't be stored server-side"
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Body $body -Headers $headers -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/mytopic",
@@ -1282,6 +1397,14 @@ to `no`. This will instruct the server not to forward messages to Firebase.
    http.DefaultClient.Do(req)
    ```

+=== "PowerShell"
+    ``` powershell
+    $uri = "https://ntfy.sh/mytopic"
+    $headers = @{ Firebase="no" }
+    $body = "This message won't be forwarded to FCM"
+    Invoke-RestMethod -Method 'Post' -Uri $uri -Body $body -Headers $headers -UseBasicParsing
+    ```
+
 === "Python"
    ``` python
    requests.post("https://ntfy.sh/mytopic",
--- a/docs/releases.md
+++ b/docs/releases.md
@@ -2,12 +2,67 @@
 Binaries for all releases can be found on the GitHub releases pages for the [ntfy server](https://github.com/binwiederhier/ntfy/releases)
 and the [ntfy Android app](https://github.com/binwiederhier/ntfy-android/releases).

+<!--
+
+## ntfy Android app v1.11.0 (UNRELEASED)
+
+**Features:**
+
+* Download attachments to cache folder ([#181](https://github.com/binwiederhier/ntfy/issues/181))
+* Regularly delete attachments for deleted notifications ([#142](https://github.com/binwiederhier/ntfy/issues/142))
+
+**Bugs:**
+
+* IllegalStateException: Failed to build unique file ([#177](https://github.com/binwiederhier/ntfy/issues/177), thanks to [@Fallenbagel](https://github.com/Fallenbagel) for reporting)
+* SQLiteConstraintException: Crash during UP registration ([#185](https://github.com/binwiederhier/ntfy/issues/185))
+* Refresh preferences screen after settings import (#183, thanks to [@cmeis](https://github.com/cmeis) for reporting)
+
+**Thanks:**
+
+* Many thanks to [@cmeis](https://github.com/cmeis), [@Fallenbagel](https://github.com/Fallenbagel), [@Joeharrison94](https://github.com/Joeharrison94),
+  and [@rogeliodh](https://github.com/rogeliodh) for input on the new attachment logic, and for testing the release
+
+## ntfy server v1.19.0 (UNRELEASED)
+
+**Bugs:**
+
+* Do not allow comma in topic name in publish via GET endpoint (no ticket) 
+
+-->
+
+## ntfy server v1.18.1
+Released Mar 21, 2022   
+_This release ships no features or bug fixes. It's merely a documentation update._
+
+**Documentation:**
+
+* Overhaul of [developer documentation](https://ntfy.sh/docs/develop/)
+* PowerShell examples for [publish documentation](https://ntfy.sh/docs/publish/) ([#138](https://github.com/binwiederhier/ntfy/issues/138), thanks to [@Joeharrison94](https://github.com/Joeharrison94))
+* Additional examples for [NodeRED, Gatus, Sonarr, Radarr, ...](https://ntfy.sh/docs/examples/) (thanks to [@nickexyz](https://github.com/nickexyz))
+* Fixes in developer instructions (thanks to [@Fallenbagel](https://github.com/Fallenbagel) for reporting)
+
+## ntfy Android app v1.10.0
+Released Mar 21, 2022
+
+**Features:**
+
+* 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)
+* Open "Click" link when tapping notification ([#110](https://github.com/binwiederhier/ntfy/issues/110), thanks [@cmeis](https://github.com/cmeis) for reporting)
+* JSON stream deprecation banner ([#164](https://github.com/binwiederhier/ntfy/issues/164))
+
+**Bug fixes:**
+
+* 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 v1.18.0
 Released Mar 16, 2022

 **Features:**

-* Publish messages as JSON ([#133](https://github.com/binwiederhier/ntfy/issues/133), thanks [@cmeis](https://github.com/cmeis) for reporting)
+* [Publish messages as JSON](https://ntfy.sh/docs/publish/#publish-as-json) ([#133](https://github.com/binwiederhier/ntfy/issues/133), 
+  thanks [@cmeis](https://github.com/cmeis) for reporting, thanks to [@Joeharrison94](https://github.com/Joeharrison94) and 
+  [@Fallenbagel](https://github.com/Fallenbagel) for testing)

 **Bug fixes:**

@@ -17,20 +72,8 @@ Released Mar 16, 2022

 **Deprecations:**

-* Removed the ability to run server as `ntfy serve` as per [deprecation](deprecations.md)
+* Removed the ability to run server as `ntfy` (as opposed to `ntfy serve`) as per [deprecation](deprecations.md)

-<!--
-## ntfy Android app v1.10.0 (UNRELEASED)
-
-**Features:**
-
-* 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](https://github.com/binwiederhier/ntfy/issues/140), thanks [@hl2guide](https://github.com/hl2guide) for reporting)
-->
 ## ntfy server v1.17.1
 Released Mar 12, 2022

--- a/docs/static/css/extra.css
+++ b/docs/static/css/extra.css
@@ -8,6 +8,10 @@
    width: unset !important;
 }

+.md-sidebar {
+    width: 12.5rem !important;
+}
+
 .md-typeset h4 {
    font-weight: 500 !important;
    margin: 0 !important;
--- a/go.mod
+++ b/go.mod
@@ -15,7 +15,7 @@ require (
 	github.com/olebedev/when v0.0.0-20211212231525-59bd4edcf9d6
 	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli/v2 v2.4.0
-	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
+	golang.org/x/crypto v0.0.0-20220321153916-2c7772ba3064
 	golang.org/x/oauth2 v0.0.0-20220309155454-6242fa91716a // indirect
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211
@@ -28,7 +28,7 @@ require (
 	cloud.google.com/go v0.100.2 // indirect
 	cloud.google.com/go/compute v1.5.0 // indirect
 	cloud.google.com/go/iam v0.3.0 // indirect
-	github.com/AlekSi/pointer v1.0.0 // indirect
+	github.com/AlekSi/pointer v1.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/emersion/go-sasl v0.0.0-20211008083017-0b9dcfb154ac // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
@@ -40,12 +40,12 @@ require (
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	go.opencensus.io v0.23.0 // indirect
 	golang.org/x/net v0.0.0-20220225172249-27dd8689420f // indirect
-	golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5 // indirect
+	golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8 // 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 v0.0.0-20220314164441-57ef72a4c106 // indirect
+	google.golang.org/genproto v0.0.0-20220322021311-435b647f9ef2 // indirect
 	google.golang.org/grpc v1.45.0 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -61,8 +61,9 @@ cloud.google.com/go/storage v1.21.0/go.mod h1:XmRlxkgPjlBONznT2dDUU/5XlpU2OjMnKu
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 firebase.google.com/go v3.13.0+incompatible h1:3TdYC3DDi6aHn20qoRkxwGqNgdjtblwVAyRLQwGn/+4=
 firebase.google.com/go v3.13.0+incompatible/go.mod h1:xlah6XbEyW6tbfSklcfe5FHJIwjt8toICdV5Wh9ptHs=
-github.com/AlekSi/pointer v1.0.0 h1:KWCWzsvFxNLcmM5XmiqHsGTTsuwZMsLFwWF9Y+//bNE=
 github.com/AlekSi/pointer v1.0.0/go.mod h1:1kjywbfcPFCmncIxtk6fIEub6LKrfMz3gc5QKVOSOA8=
+github.com/AlekSi/pointer v1.2.0 h1:glcy/gc4h8HnG2Z3ZECSzZ1IX1x2JxRVuDzaJwQE0+w=
+github.com/AlekSi/pointer v1.2.0/go.mod h1:gZGfd3dpW4vEc/UlyfKKi1roIqcCgwOIvb0tSNSBle0=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v1.0.0 h1:dtDWrepsVPfW9H/4y7dDgFc2MBUSeJhlaDtK13CxFlU=
 github.com/BurntSushi/toml v1.0.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
@@ -244,8 +245,9 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20220321153916-2c7772ba3064 h1:S25/rfnfsMVgORT4/J61MJ7rdyseOZOyvLIrZEZ7s6s=
+golang.org/x/crypto v0.0.0-20220321153916-2c7772ba3064/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -317,6 +319,7 @@ golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4/go.mod h1:RBQZq4jEuRlivfhVLd
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210505024714-0287a6fb4125/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f h1:oA4XRj0qtSt8Yo1Zms0CUlsT3KG69V2UGQWPBxujDmc=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
@@ -406,8 +409,9 @@ golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220128215802-99c3d69c2c27/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220209214540-3681064d5158/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220227234510-4e6760a101f9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5 h1:y/woIyUBFbpQGKS0u1aHF/40WUDnek3fPOyD08H5Vng=
 golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8 h1:OH54vjqzRWmbJ62fjuhxy7AxFFgoHN0/DPc/UrL8cAs=
+golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -604,8 +608,8 @@ google.golang.org/genproto v0.0.0-20220218161850-94dd64e39d7c/go.mod h1:kGP+zUP2
 google.golang.org/genproto v0.0.0-20220222213610-43724f9ea8cf/go.mod h1:kGP+zUP2Ddo0ayMi4YuN7C3WZyJvGLZRh8Z5wnAqvEI=
 google.golang.org/genproto v0.0.0-20220304144024-325a89244dc8/go.mod h1:kGP+zUP2Ddo0ayMi4YuN7C3WZyJvGLZRh8Z5wnAqvEI=
 google.golang.org/genproto v0.0.0-20220310185008-1973136f34c6/go.mod h1:kGP+zUP2Ddo0ayMi4YuN7C3WZyJvGLZRh8Z5wnAqvEI=
-google.golang.org/genproto v0.0.0-20220314164441-57ef72a4c106 h1:ErU+UA6wxadoU8nWrsy5MZUVBs75K17zUCsUCIfrXCE=
-google.golang.org/genproto v0.0.0-20220314164441-57ef72a4c106/go.mod h1:hAL49I2IFola2sVEjAn7MEwsja0xp51I0tlGAf9hz4E=
+google.golang.org/genproto v0.0.0-20220322021311-435b647f9ef2 h1:3n0D2NdPGm0g0wrVJzXJWW5CBOoqgGBkDX9cRMJHZAY=
+google.golang.org/genproto v0.0.0-20220322021311-435b647f9ef2/go.mod h1:hAL49I2IFola2sVEjAn7MEwsja0xp51I0tlGAf9hz4E=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
@@ -648,8 +652,9 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
+google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,3 @@
 # The documentation uses 'mkdocs', which is written in Python
-
-# See https://github.com/squidfunk/mkdocs-material/issues/2030
-jinja2>=2.11.1
-
-# mkdocs
-mkdocs
 mkdocs-material
 mkdocs-minify-plugin
--- a/server/errors.go
+++ b/server/errors.go
@@ -40,14 +40,16 @@ var (
 	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", ""}
+	errHTTPNotFound                                  = &errHTTP{40401, http.StatusNotFound, "not found", ""}
+	errHTTPNotFoundMessageID                         = &errHTTP{40402, http.StatusNotFound, "not found: unable to find message with this ID", "https://ntfy.sh/docs/publish/#updating-messages"} // FIXME LINK
 	errHTTPUnauthorized                              = &errHTTP{40101, http.StatusUnauthorized, "unauthorized", "https://ntfy.sh/docs/publish/#authentication"}
 	errHTTPForbidden                                 = &errHTTP{40301, http.StatusForbidden, "forbidden", "https://ntfy.sh/docs/publish/#authentication"}
 	errHTTPTooManyRequestsLimitRequests              = &errHTTP{42901, http.StatusTooManyRequests, "limit reached: too many requests, please be nice", "https://ntfy.sh/docs/publish/#limitations"}
 	errHTTPTooManyRequestsLimitEmails                = &errHTTP{42902, http.StatusTooManyRequests, "limit reached: too many emails, please be nice", "https://ntfy.sh/docs/publish/#limitations"}
 	errHTTPTooManyRequestsLimitSubscriptions         = &errHTTP{42903, http.StatusTooManyRequests, "limit reached: too many active subscriptions, please be nice", "https://ntfy.sh/docs/publish/#limitations"}
 	errHTTPTooManyRequestsLimitTotalTopics           = &errHTTP{42904, http.StatusTooManyRequests, "limit reached: the total number of topics on the server has been reached, please contact the admin", "https://ntfy.sh/docs/publish/#limitations"}
-	errHTTPTooManyRequestsAttachmentBandwidthLimit   = &errHTTP{42905, http.StatusTooManyRequests, "too many requests: daily bandwidth limit reached", "https://ntfy.sh/docs/publish/#limitations"}
+	errHTTPTooManyRequestsAttachmentBandwidthLimit   = &errHTTP{42905, http.StatusTooManyRequests, "limit reached: daily bandwidth limit reached, please be nice", "https://ntfy.sh/docs/publish/#limitations"}
+	errHTTPTooManyRequestsUpdatingTooQuickly         = &errHTTP{42906, http.StatusTooManyRequests, "limit reached: too many consecutive message updates", "https://ntfy.sh/docs/publish/#updating-messages"} // FIXME LINK
 	errHTTPInternalError                             = &errHTTP{50001, http.StatusInternalServerError, "internal server error", ""}
 	errHTTPInternalErrorInvalidFilePath              = &errHTTP{50002, http.StatusInternalServerError, "internal server error: invalid file path", ""}
 )
--- a/server/message_cache.go
+++ b/server/message_cache.go
@@ -23,6 +23,7 @@ const (
 			id INTEGER PRIMARY KEY AUTOINCREMENT,
 			mid TEXT NOT NULL,
 			time INT NOT NULL,
+			updated INT NOT NULL,
 			topic TEXT NOT NULL,
 			message TEXT NOT NULL,
 			title TEXT NOT NULL,
@@ -43,41 +44,47 @@ const (
 		COMMIT;
 	`
 	insertMessageQuery = `
-		INSERT INTO messages (mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding, published) 
-		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		INSERT INTO messages (mid, time, updated, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding, published) 
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
 	`
+	updateMessageQuery           = `UPDATE messages SET updated = ?, message = ?, title = ?, priority = ?, tags = ?, click = ? WHERE topic = ? AND mid = ?`
 	pruneMessagesQuery           = `DELETE FROM messages WHERE time < ? AND published = 1`
 	selectRowIDFromMessageID     = `SELECT id FROM messages WHERE topic = ? AND mid = ?`
 	selectMessagesSinceTimeQuery = `
-		SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
+		SELECT mid, time, updated, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
 		FROM messages 
 		WHERE topic = ? AND time >= ? AND published = 1
 		ORDER BY time, id
 	`
 	selectMessagesSinceTimeIncludeScheduledQuery = `
-		SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
+		SELECT mid, time, updated, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
 		FROM messages 
 		WHERE topic = ? AND time >= ?
 		ORDER BY time, id
 	`
 	selectMessagesSinceIDQuery = `
-		SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
+		SELECT mid, time, updated, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
 		FROM messages 
-		WHERE topic = ? AND id > ? AND published = 1 
+		WHERE topic = ? AND id >= ? AND published = 1 
 		ORDER BY time, id
 	`
 	selectMessagesSinceIDIncludeScheduledQuery = `
-		SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
+		SELECT mid, time, updated, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
 		FROM messages 
-		WHERE topic = ? AND (id > ? OR published = 0)
+		WHERE topic = ? AND (id >= ? OR published = 0)
 		ORDER BY time, id
 	`
 	selectMessagesDueQuery = `
-		SELECT mid, time, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
+		SELECT mid, time, updated, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
 		FROM messages 
 		WHERE time <= ? AND published = 0
 		ORDER BY time, id
 	`
+	selectMessageByIDQuery = `
+		SELECT mid, time, updated, topic, message, title, priority, tags, click, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_owner, encoding
+		FROM messages 
+		WHERE topic = ? AND mid = ?
+	`
 	updateMessagePublishedQuery     = `UPDATE messages SET published = 1 WHERE mid = ?`
 	selectMessagesCountQuery        = `SELECT COUNT(*) FROM messages`
 	selectMessageCountForTopicQuery = `SELECT COUNT(*) FROM messages WHERE topic = ?`
@@ -88,7 +95,7 @@ const (

 // Schema management queries
 const (
-	currentSchemaVersion          = 5
+	currentSchemaVersion          = 6
 	createSchemaVersionTableQuery = `
 		CREATE TABLE IF NOT EXISTS schemaVersion (
 			id INT PRIMARY KEY,
@@ -166,6 +173,11 @@ const (
 		ALTER TABLE messages_new RENAME TO messages;
 		COMMIT;
 	`
+
+	// 5 -> 6
+	migrate5To6AlterMessagesTableQuery = `
+		ALTER TABLE messages ADD COLUMN updated INT NOT NULL DEFAULT (0);
+	`
 )

 type messageCache struct {
@@ -232,6 +244,7 @@ func (c *messageCache) AddMessage(m *message) error {
 		insertMessageQuery,
 		m.ID,
 		m.Time,
+		m.Updated,
 		m.Topic,
 		m.Message,
 		m.Title,
@@ -250,6 +263,28 @@ func (c *messageCache) AddMessage(m *message) error {
 	return err
 }

+func (c *messageCache) UpdateMessage(m *message) error {
+	if m.Event != messageEvent {
+		return errUnexpectedMessageType
+	}
+	if c.nop {
+		return nil
+	}
+	tags := strings.Join(m.Tags, ",")
+	_, err := c.db.Exec(
+		updateMessageQuery,
+		m.Updated,
+		m.Message,
+		m.Title,
+		m.Priority,
+		tags,
+		m.Click,
+		m.Topic,
+		m.ID,
+	)
+	return err
+}
+
 func (c *messageCache) Messages(topic string, since sinceMarker, scheduled bool) ([]*message, error) {
 	if since.IsNone() {
 		return make([]*message, 0), nil
@@ -296,7 +331,15 @@ func (c *messageCache) messagesSinceID(topic string, since sinceMarker, schedule
 	if err != nil {
 		return nil, err
 	}
-	return readMessages(rows)
+	messages, err := readMessages(rows)
+	if err != nil {
+		return nil, err
+	} else if len(messages) == 0 {
+		return messages, nil
+	} else if since.IsTime() && messages[0].Updated > since.Time().Unix() {
+		return messages, nil
+	}
+	return messages[1:], nil // Do not include row with ID itself
 }

 func (c *messageCache) MessagesDue() ([]*message, error) {
@@ -393,16 +436,31 @@ func (c *messageCache) AttachmentsExpired() ([]string, error) {
 	return ids, nil
 }

+func (c *messageCache) Message(topic, id string) (*message, error) {
+	rows, err := c.db.Query(selectMessageByIDQuery, topic, id)
+	if err != nil {
+		return nil, err
+	}
+	messages, err := readMessages(rows)
+	if err != nil {
+		return nil, err
+	} else if len(messages) == 0 {
+		return nil, errors.New("not found")
+	}
+	return messages[0], nil
+}
+
 func readMessages(rows *sql.Rows) ([]*message, error) {
 	defer rows.Close()
 	messages := make([]*message, 0)
 	for rows.Next() {
-		var timestamp, attachmentSize, attachmentExpires int64
+		var timestamp, updated, attachmentSize, attachmentExpires int64
 		var priority int
 		var id, topic, msg, title, tagsStr, click, attachmentName, attachmentType, attachmentURL, attachmentOwner, encoding string
 		err := rows.Scan(
 			&id,
 			&timestamp,
+			&updated,
 			&topic,
 			&msg,
 			&title,
@@ -438,6 +496,7 @@ func readMessages(rows *sql.Rows) ([]*message, error) {
 		messages = append(messages, &message{
 			ID:         id,
 			Time:       timestamp,
+			Updated:    updated,
 			Event:      messageEvent,
 			Topic:      topic,
 			Message:    msg,
@@ -490,6 +549,8 @@ func setupCacheDB(db *sql.DB) error {
 		return migrateFrom3(db)
 	} else if schemaVersion == 4 {
 		return migrateFrom4(db)
+	} else if schemaVersion == 5 {
+		return migrateFrom5(db)
 	}
 	return fmt.Errorf("unexpected schema version found: %d", schemaVersion)
 }
@@ -562,5 +623,16 @@ func migrateFrom4(db *sql.DB) error {
 	if _, err := db.Exec(updateSchemaVersion, 5); err != nil {
 		return err
 	}
+	return migrateFrom5(db)
+}
+
+func migrateFrom5(db *sql.DB) error {
+	log.Print("Migrating cache database schema: from 5 to 6")
+	if _, err := db.Exec(migrate5To6AlterMessagesTableQuery); err != nil {
+		return err
+	}
+	if _, err := db.Exec(updateSchemaVersion, 6); err != nil {
+		return err
+	}
 	return nil // Update this when a new version is added
 }
--- a/server/server.go
+++ b/server/server.go
@@ -55,15 +55,16 @@ type handleFunc func(http.ResponseWriter, *http.Request, *visitor) error

 var (
 	// If changed, don't forget to update Android App and auth_sqlite.go
-	topicRegex        = regexp.MustCompile(`^[-_A-Za-z0-9]{1,64}$`)               // No /!
-	topicPathRegex    = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}$`)              // Regex must match JS & Android app!
-	extTopicPathRegex = regexp.MustCompile(`^/[^/]+\.[^/]+/[-_A-Za-z0-9]{1,64}$`) // Extended topic path, for web-app, e.g. /example.com/mytopic
-	jsonPathRegex     = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/json$`)
-	ssePathRegex      = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/sse$`)
-	rawPathRegex      = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/raw$`)
-	wsPathRegex       = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/ws$`)
-	authPathRegex     = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/auth$`)
-	publishPathRegex  = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/(publish|send|trigger)$`)
+	topicRegex             = regexp.MustCompile(`^[-_A-Za-z0-9]{1,64}$`)                  // No /!
+	topicPathRegex         = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}$`)                 // Regex must match JS & Android app!
+	updateTopicPathRegex   = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}/[A-Za-z0-9]{12}$`) // ID length must match messageIDLength & util.randomStringCharset
+	externalTopicPathRegex = regexp.MustCompile(`^/[^/]+\.[^/]+/[-_A-Za-z0-9]{1,64}$`)    // Extended topic path, for web-app, e.g. /example.com/mytopic
+	jsonPathRegex          = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/json$`)
+	ssePathRegex           = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/sse$`)
+	rawPathRegex           = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/raw$`)
+	wsPathRegex            = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/ws$`)
+	authPathRegex          = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}(,[-_A-Za-z0-9]{1,64})*/auth$`)
+	publishPathRegex       = regexp.MustCompile(`^/[-_A-Za-z0-9]{1,64}/(publish|send|trigger)$`)

 	webConfigPath    = "/config.js"
 	staticRegex      = regexp.MustCompile(`^/static/.+`)
@@ -279,7 +280,7 @@ func (s *Server) handleInternal(w http.ResponseWriter, r *http.Request, v *visit
 		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) {
+	} else if (r.Method == http.MethodPut || r.Method == http.MethodPost) && (topicPathRegex.MatchString(r.URL.Path) || updateTopicPathRegex.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) {
 		return s.limitRequests(s.authWrite(s.handlePublish))(w, r, v)
@@ -293,7 +294,7 @@ func (s *Server) handleInternal(w http.ResponseWriter, r *http.Request, v *visit
 		return s.limitRequests(s.authRead(s.handleSubscribeWS))(w, r, v)
 	} else if r.Method == http.MethodGet && authPathRegex.MatchString(r.URL.Path) {
 		return s.limitRequests(s.authRead(s.handleTopicAuth))(w, r, v)
-	} else if r.Method == http.MethodGet && (topicPathRegex.MatchString(r.URL.Path) || extTopicPathRegex.MatchString(r.URL.Path)) {
+	} else if r.Method == http.MethodGet && (topicPathRegex.MatchString(r.URL.Path) || externalTopicPathRegex.MatchString(r.URL.Path)) {
 		return s.handleTopic(w, r)
 	}
 	return errHTTPNotFound
@@ -390,7 +391,26 @@ func (s *Server) handleFile(w http.ResponseWriter, r *http.Request, v *visitor)
 }

 func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visitor) error {
-	t, err := s.topicFromPath(r.URL.Path)
+	t, messageID, err := s.topicAndMessageIDFromPath(r.URL.Path)
+	if err != nil {
+		return err
+	}
+	var m *message
+	update := messageID != ""
+	if update {
+		m, err = s.messageCache.Message(t.ID, messageID)
+		if err != nil {
+			return errHTTPNotFoundMessageID
+		}
+		newUpdated := time.Now().Unix()
+		if newUpdated <= m.Updated {
+			return errHTTPTooManyRequestsUpdatingTooQuickly
+		}
+		m.Updated = newUpdated
+	} else {
+		m = newDefaultMessage(t.ID, "")
+	}
+	cache, firebase, email, unifiedpush, err := s.parsePublishParams(r, v, m)
 	if err != nil {
 		return err
 	}
@@ -398,11 +418,6 @@ func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visito
 	if err != nil {
 		return err
 	}
-	m := newDefaultMessage(t.ID, "")
-	cache, firebase, email, unifiedpush, err := s.parsePublishParams(r, v, m)
-	if err != nil {
-		return err
-	}
 	if err := s.handlePublishBody(r, v, m, body, unifiedpush); err != nil {
 		return err
 	}
@@ -430,8 +445,14 @@ func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visito
 		}()
 	}
 	if cache {
-		if err := s.messageCache.AddMessage(m); err != nil {
-			return err
+		if update {
+			if err := s.messageCache.UpdateMessage(m); err != nil {
+				return err
+			}
+		} else {
+			if err := s.messageCache.AddMessage(m); err != nil {
+				return err
+			}
 		}
 	}
 	w.Header().Set("Content-Type", "application/json")
@@ -447,9 +468,19 @@ func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visito

 func (s *Server) parsePublishParams(r *http.Request, v *visitor, m *message) (cache bool, firebase bool, email string, unifiedpush bool, err error) {
 	cache = readBoolParam(r, true, "x-cache", "cache")
+	if !cache && m.Updated != 0 {
+		return false, false, "", false, errors.New("message updates must be cached")
+	}
+	// TODO more restrictions
 	firebase = readBoolParam(r, true, "x-firebase", "firebase")
-	m.Title = readParam(r, "x-title", "title", "t")
-	m.Click = readParam(r, "x-click", "click")
+	title := readParam(r, "x-title", "title", "t")
+	if title != "" {
+		m.Title = title
+	}
+	click := readParam(r, "x-click", "click")
+	if click != "" {
+		m.Click = click
+	}
 	filename := readParam(r, "x-filename", "filename", "file", "f")
 	attach := readParam(r, "x-attach", "attach", "a")
 	if attach != "" || filename != "" {
@@ -489,9 +520,11 @@ func (s *Server) parsePublishParams(r *http.Request, v *visitor, m *message) (ca
 	if messageStr != "" {
 		m.Message = messageStr
 	}
-	m.Priority, err = util.ParsePriority(readParam(r, "x-priority", "priority", "prio", "p"))
+	priority, err := util.ParsePriority(readParam(r, "x-priority", "priority", "prio", "p"))
 	if err != nil {
 		return false, false, "", false, errHTTPBadRequestPriorityInvalid
+	} else if priority > 0 {
+		m.Priority = priority
 	}
 	tagsStr := readParam(r, "x-tags", "tags", "tag", "ta")
 	if tagsStr != "" {
@@ -870,6 +903,13 @@ func parseSince(r *http.Request, poll bool) (sinceMarker, error) {
 		return sinceNoMessages, nil
 	}

+	// ID/timestamp
+	parts := strings.Split(since, "/")
+	if len(parts) == 2 && validMessageID(parts[0]) && validUnixTimestamp(parts[1]) {
+		t, _ := toUnixTimestamp(parts[1])
+		return newSince(parts[0], t), nil
+	}
+
 	// ID, timestamp, duration
 	if validMessageID(since) {
 		return newSinceID(since), nil
@@ -888,16 +928,20 @@ func (s *Server) handleOptions(w http.ResponseWriter, _ *http.Request) error {
 	return nil
 }

-func (s *Server) topicFromPath(path string) (*topic, error) {
+func (s *Server) topicAndMessageIDFromPath(path string) (*topic, string, error) {
 	parts := strings.Split(path, "/")
-	if len(parts) < 2 {
-		return nil, errHTTPBadRequestTopicInvalid
+	if len(parts) != 2 && len(parts) != 3 {
+		return nil, "", errHTTPBadRequestTopicInvalid
 	}
 	topics, err := s.topicsFromIDs(parts[1])
 	if err != nil {
-		return nil, err
+		return nil, "", err
 	}
-	return topics[0], nil
+	messageID := ""
+	if len(parts) == 3 && len(parts[2]) == messageIDLength {
+		messageID = parts[2]
+	}
+	return topics[0], messageID, nil
 }

 func (s *Server) topicsFromPath(path string) ([]*topic, string, error) {
--- a/server/server_firebase.go
+++ b/server/server_firebase.go
@@ -72,6 +72,7 @@ func toFirebaseMessage(m *message, auther auth.Auther) (*messaging.Message, erro
 			data = map[string]string{
 				"id":       m.ID,
 				"time":     fmt.Sprintf("%d", m.Time),
+				"updated":  fmt.Sprintf("%d", m.Updated),
 				"event":    m.Event,
 				"topic":    m.Topic,
 				"priority": fmt.Sprintf("%d", m.Priority),
--- a/server/server_firebase_test.go
+++ b/server/server_firebase_test.go
@@ -77,6 +77,7 @@ func TestToFirebaseMessage_Message_Normal_Allowed(t *testing.T) {
 	require.Equal(t, map[string]string{
 		"id":                 m.ID,
 		"time":               fmt.Sprintf("%d", m.Time),
+		"updated":            "0",
 		"event":              "message",
 		"topic":              "mytopic",
 		"priority":           "4",
--- a/server/server_test.go
+++ b/server/server_test.go
@@ -203,6 +203,14 @@ func TestServer_PublishPriority(t *testing.T) {
 	require.Equal(t, 40007, toHTTPError(t, response.Body.String()).Code)
 }

+func TestServer_PublishGETOnlyOneTopic(t *testing.T) {
+	// This tests a bug that allowed publishing topics with a comma in the name (no ticket)
+
+	s := newTestServer(t, newTestConfig(t))
+	response := request(t, s, "GET", "/mytopic,mytopic2/publish?m=hi", "", nil)
+	require.Equal(t, 404, response.Code)
+}
+
 func TestServer_PublishNoCache(t *testing.T) {
 	s := newTestServer(t, newTestConfig(t))

@@ -382,6 +390,69 @@ func TestServer_PublishAndPollSince(t *testing.T) {
 	require.Equal(t, 40008, toHTTPError(t, response.Body.String()).Code)
 }

+func TestServer_PublishUpdateAndPollSince(t *testing.T) {
+	s := newTestServer(t, newTestConfig(t))
+
+	// Initial PUT
+	response := request(t, s, "PUT", "/mytopic?t=atitle&tags=tag1,tag2&prio=high&click=https://google.com&attach=https://heckel.io", "test 1", nil)
+	message1 := toMessage(t, response.Body.String())
+	require.Equal(t, int64(0), message1.Updated)
+	require.Equal(t, "test 1", message1.Message)
+	require.Equal(t, "atitle", message1.Title)
+	require.Equal(t, 4, message1.Priority)
+	require.Equal(t, []string{"tag1", "tag2"}, message1.Tags)
+	require.Equal(t, "https://google.com", message1.Click)
+	require.Equal(t, "https://heckel.io", message1.Attachment.URL)
+
+	// Update
+	response = request(t, s, "PUT", "/mytopic/"+message1.ID+"?prio=low", "test 2", nil)
+	message2 := toMessage(t, response.Body.String())
+	require.Equal(t, message1.ID, message2.ID)
+	require.True(t, message2.Updated > message1.Updated)
+	require.Equal(t, "test 2", message2.Message) // Updated
+	require.Equal(t, "atitle", message2.Title)
+	require.Equal(t, 2, message2.Priority) // Updated
+	require.Equal(t, []string{"tag1", "tag2"}, message2.Tags)
+	require.Equal(t, "https://google.com", message2.Click)
+	require.Equal(t, "https://heckel.io", message2.Attachment.URL)
+
+	time.Sleep(1100 * time.Millisecond)
+
+	// Another update
+	response = request(t, s, "PUT", "/mytopic/"+message1.ID+"?title=new+title", "test 3", nil)
+	message3 := toMessage(t, response.Body.String())
+	require.True(t, message3.Updated > message2.Updated)
+	require.Equal(t, "test 3", message3.Message)  // Updated
+	require.Equal(t, "new title", message3.Title) // Updated
+
+	// Get all messages: Should be only one that was updated
+	since := "all"
+	response = request(t, s, "GET", "/mytopic/json?since="+since+"&poll=1", "", nil)
+	messages := toMessages(t, response.Body.String())
+	require.Equal(t, 1, len(messages))
+	require.Equal(t, message1.ID, messages[0].ID)
+	require.Equal(t, "test 3", messages[0].Message)
+
+	// Get all messages since "message ID": Should be zero, since we know this message
+	since = message1.ID
+	response = request(t, s, "GET", "/mytopic/json?since="+since+"&poll=1", "", nil)
+	messages = toMessages(t, response.Body.String())
+	require.Equal(t, 0, len(messages))
+
+	// Get all messages since "message ID" but with an older timestamp: Should be the latest updated message
+	since = fmt.Sprintf("%s/%d", message1.ID, message2.Updated) // We're missing an update
+	response = request(t, s, "GET", "/mytopic/json?since="+since+"&poll=1", "", nil)
+	messages = toMessages(t, response.Body.String())
+	require.Equal(t, 1, len(messages))
+	require.Equal(t, "test 3", messages[0].Message)
+
+	// Get all messages since "message ID" with the current timestamp: No messages expected
+	since = fmt.Sprintf("%s/%d", message3.ID, message3.Updated) // We are up-to-date
+	response = request(t, s, "GET", "/mytopic/json?since="+since+"&poll=1", "", nil)
+	messages = toMessages(t, response.Body.String())
+	require.Equal(t, 0, len(messages))
+}
+
 func TestServer_PublishViaGET(t *testing.T) {
 	s := newTestServer(t, newTestConfig(t))

--- a/server/types.go
+++ b/server/types.go
@@ -1,8 +1,10 @@
 package server

 import (
+	"errors"
 	"heckel.io/ntfy/util"
 	"net/http"
+	"strconv"
 	"time"
 )

@@ -20,9 +22,11 @@ const (

 // message represents a message published to a topic
 type message struct {
-	ID         string      `json:"id"`    // Random message ID
-	Time       int64       `json:"time"`  // Unix time in seconds
-	Event      string      `json:"event"` // One of the above
+	ID         string      `json:"id"`                // Random message ID
+	Time       int64       `json:"time"`              // Unix time in seconds
+	Updated    int64       `json:"updated,omitempty"` // Set if updated, unix time in seconds
+	Deleted    int64       `json:"deleted,omitempty"` // Set if deleted, unix time in seconds
+	Event      string      `json:"event"`             // One of the above
 	Topic      string      `json:"topic"`
 	Priority   int         `json:"priority,omitempty"`
 	Tags       []string    `json:"tags,omitempty"`
@@ -30,7 +34,7 @@ type message struct {
 	Attachment *attachment `json:"attachment,omitempty"`
 	Title      string      `json:"title,omitempty"`
 	Message    string      `json:"message,omitempty"`
-	Encoding   string      `json:"encoding,omitempty"` // empty for raw UTF-8, or "base64" for encoded bytes
+	Encoding   string      `json:"encoding,omitempty"` // Empty for raw UTF-8, or "base64" for encoded bytes
 }

 type attachment struct {
@@ -90,11 +94,31 @@ func validMessageID(s string) bool {
 	return util.ValidRandomString(s, messageIDLength)
 }

+func validUnixTimestamp(s string) bool {
+	_, err := toUnixTimestamp(s)
+	return err == nil
+}
+
+func toUnixTimestamp(s string) (int64, error) {
+	u, err := strconv.ParseInt(s, 10, 64)
+	if err != nil {
+		return 0, err
+	}
+	if u < 1000000000 || u > 3000000000 { // I know. It's practical. So relax ...
+		return 0, errors.New("invalid unix date")
+	}
+	return u, nil
+}
+
 type sinceMarker struct {
 	time time.Time
 	id   string
 }

+func newSince(id string, timestamp int64) sinceMarker {
+	return sinceMarker{time.Unix(timestamp, 0), id}
+}
+
 func newSinceTime(timestamp int64) sinceMarker {
 	return sinceMarker{time.Unix(timestamp, 0), ""}
 }
@@ -115,6 +139,10 @@ func (t sinceMarker) IsID() bool {
 	return t.id != ""
 }

+func (t sinceMarker) IsTime() bool {
+	return t.time.Unix() > 0
+}
+
 func (t sinceMarker) Time() time.Time {
 	return t.time
 }
--- a/util/util.go
+++ b/util/util.go
@@ -17,7 +17,7 @@ import (
 )

 const (
-	randomStringCharset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	randomStringCharset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" // Update updateTopicPathRegex if changed
 )

 var (
--- a/web/package-lock.json
+++ b/web/package-lock.json
--- a/web/package.json
+++ b/web/package.json
@@ -22,8 +22,7 @@
    "react-router-dom": "^6.2.2",
    "react-scripts": "^5.0.0",
    "stacktrace-gps": "^3.0.4",
-    "stacktrace-js": "^2.0.2",
-    "svgo": "^2.8.0"
+    "stacktrace-js": "^2.0.2"
  },
  "browserslist": {
    "production": [
--- a/web/src/app/SubscriptionManager.js
+++ b/web/src/app/SubscriptionManager.js
@@ -65,13 +65,17 @@ class SubscriptionManager {

    /** Adds notification, or returns false if it already exists */
    async addNotification(subscriptionId, notification) {
-        const exists = await db.notifications.get(notification.id);
-        if (exists) {
-            return false;
+        const existingNotification = await db.notifications.get(notification.id);
+        if (existingNotification) {
+            const upToDate = (existingNotification?.updated ?? 0) >= (notification.updated ?? 0);
+            if (upToDate) {
+                console.error(`[SubscriptionManager] up to date`, existingNotification, notification);
+                return false;
+            }
        }
        try {
            notification.new = 1; // New marker (used for bubble indicator); cannot be boolean; Dexie index limitation
-            await db.notifications.add({ ...notification, subscriptionId }); // FIXME consider put() for double tab
+            await db.notifications.put({ ...notification, subscriptionId });
            await db.subscriptions.update(subscriptionId, {
                last: notification.id
            });
--- a/web/src/components/ActionBar.js
+++ b/web/src/components/ActionBar.js
@@ -121,13 +121,16 @@ const SettingsIcons = (props) => {
            "Titles are optional, did you know that?",
            "ntfy is open source, and will always be free. Cool, right?",
            "I don't really like apples",
-            "My favorite TV show is The Wire. You should watch it!"
+            "My favorite TV show is The Wire. You should watch it!",
+            "You can attach files and URLs to messages too",
+            "You can delay messages up to 3 days"
        ])[0];
+        const nowSeconds = Math.round(Date.now()/1000);
        const message = shuffle([
-            `Hello friend, this is a test notification from ntfy web. It's ${formatShortDateTime(Date.now())} right now. Is that early or late?`,
+            `Hello friend, this is a test notification from ntfy web. It's ${formatShortDateTime(nowSeconds)} right now. Is that early or late?`,
            `So I heard you like ntfy? If that's true, go to GitHub and star it, or to the Play store and rate it. Thanks! Oh yeah, this is a test notification.`,
            `It's almost like you want to hear what I have to say. I'm not even a machine. I'm just a sentence that Phil typed on a random Thursday.`,
-            `Alright then, it's ${formatShortDateTime(Date.now())} already. Boy oh boy, where did the time go? I hope you're alright, friend.`,
+            `Alright then, it's ${formatShortDateTime(nowSeconds)} already. Boy oh boy, where did the time go? I hope you're alright, friend.`,
            `There are nine million bicycles in Beijing That's a fact; It's a thing we can't deny. I wonder if that's true ...`,
            `I'm really excited that you're trying out ntfy. Did you know that there are a few public topics, such as ntfy.sh/stats and ntfy.sh/announcements.`,
            `It's interesting to hear what people use ntfy for. I've heard people talk about using it for so many cool things. What do you use it for?`
Author	SHA1	Message	Date
Philipp Heckel	a327fe802e	Make web app work for updated notifications	2022-03-25 11:01:07 -04:00
Philipp Heckel	86baa80ab8	Merge branch 'main' into update-messages	2022-03-24 19:30:27 -04:00
Philipp Heckel	5a99fe8ba2	Try it a better way	2022-03-24 19:27:07 -04:00
Philipp Heckel	ee0f448d86	Another try	2022-03-24 19:25:41 -04:00
Philipp Heckel	a222f64ee4	Hopefully fix the build	2022-03-24 19:23:30 -04:00
Philipp Heckel	0a77c5296b	Add since=$ID/$timestamp parsing logic	2022-03-24 17:05:07 -04:00
Philipp Heckel	b7871b80ab	Merge branch 'main' into update-messages	2022-03-24 13:27:04 -04:00
Philipp Heckel	140daec0d3	Fix date formatting issue in example	2022-03-24 13:17:04 -04:00
Philipp Heckel	8939173a1e	Continued work	2022-03-23 21:51:38 -04:00
Philipp Heckel	8848829dfa	WIP: Update messages	2022-03-23 16:39:22 -04:00
Philipp Heckel	b409c89d3b	Do not allow comma in topic name in publish via GET endpoint (no ticket)	2022-03-23 14:29:55 -04:00
Philipp Heckel	806893962c	Changelog	2022-03-23 11:02:12 -04:00
Philipp Heckel	14d3c5e93e	Changelog	2022-03-22 20:31:43 -04:00
Philipp Heckel	37e14b13a4	Update deps	2022-03-22 19:54:20 -04:00
Philipp Heckel	d7fa51be2c	Changelog	2022-03-22 15:26:15 -04:00
Philipp Heckel	a3e28e71aa	Bump version	2022-03-21 23:23:46 -04:00
Philipp Heckel	35cef8386c	Release docs	2022-03-21 23:13:45 -04:00
Philipp Heckel	38072c9cdd	Release log	2022-03-20 19:55:32 -04:00
Philipp Heckel	13d741b89e	Changelog	2022-03-20 15:12:06 -04:00
Philipp Heckel	23547f4504	New lines	2022-03-18 19:39:37 -04:00
Philipp Heckel	e6f19d050f	Updated examples, release notes	2022-03-18 17:34:14 -04:00
Philipp C. Heckel	3ec8084450	Merge pull request #176 from nickexyz/docs-update Add Node-RED and Gatus examples.	2022-03-18 17:27:57 -04:00
Philipp Heckel	2edb722c0e	Refinement	2022-03-18 17:18:52 -04:00
Philipp Heckel	1f75498dca	More docs	2022-03-18 17:00:08 -04:00
Niclas Andersson	ab19c4d688	Add Node-RED and Gatus examples.	2022-03-18 21:58:33 +01:00
Philipp Heckel	15265d9ef3	Merge branch 'main' into develop-docs	2022-03-18 15:08:29 -04:00
Philipp Heckel	2839a7228f	Merge branch 'main' of github.com:binwiederhier/ntfy into HEAD	2022-03-18 15:00:01 -04:00
Philipp Heckel	c2036975fa	Lots of development instructions, Makefile things	2022-03-18 13:53:52 -04:00
Joe Harrison	7aa0f87376	Merge pull request #1 from Joeharrison94/Joeharrison94-patch-1 Update to publish.md to add PowerShell examples	2022-03-18 09:18:01 +00:00
Joe Harrison	df372d1a7e	Update to publish.md to add PowerShell examples	2022-03-18 09:17:19 +00:00
Philipp Heckel	6cd31502e7	Merge branch 'main' of github.com:binwiederhier/ntfy into develop-docs	2022-03-17 16:04:15 -04:00
Philipp C. Heckel	bade88079f	Merge pull request #173 from nickexyz/arr_docs Add examples for *arr notification scripts	2022-03-17 16:03:42 -04:00
Niclas Andersson	20ab05afc8	Add examples for *arr notification scripts	2022-03-17 19:20:48 +01:00
Philipp Heckel	5b10f51af1	WIP: Develop docs	2022-03-16 22:33:23 -04:00
Philipp Heckel	470d11f442	Fix install instructions	2022-03-16 21:40:56 -04:00
Philipp Heckel	4952f0fbd2	Tiny fixes to release notes	2022-03-16 21:05:51 -04:00