Makefile, Dockerfile, GoReleaser, config.yml, systemd service

.gitignore

@@ -1,2 +1,3 @@
+dist/
 .idea/
 *.iml

.goreleaser.yml

@@ -0,0 +1,62 @@
+before:
+  hooks:
+    - go mod download
+builds:
+  - binary: ntfy
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+    goarch:
+      - amd64
+nfpms:
+  -
+    package_name: ntfy
+    file_name_template: "{{ .ProjectName }}_{{ .Version }}_{{ .Arch }}"
+    homepage: https://heckel.io/ntfy
+    maintainer: Philipp C. Heckel <philipp.heckel@gmail.com>
+    description: Simple pub-sub notification service
+    license: Apache 2.0
+    formats:
+      - deb
+      - rpm
+    bindir: /usr/bin
+    contents:
+      - src: config/config.yml
+        dst: /etc/ntfy/config.yml
+        type: config
+      - src: config/ntfy.service
+        dst: /lib/systemd/system/ntfy.service
+    scripts:
+      postremove: "scripts/postrm.sh"
+archives:
+  -
+    wrap_in_directory: true
+    files:
+      - LICENSE
+      - README.md
+      - config/config.yml
+      - config/ntfy.service
+    replacements:
+      386: i386
+      amd64: x86_64
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+dockers:
+  - dockerfile: Dockerfile
+    ids:
+      - ntfy
+    image_templates:
+      - "binwiederhier/ntfy:latest"
+      - "binwiederhier/ntfy:{{ .Tag }}"
+      - "binwiederhier/ntfy:v{{ .Major }}.{{ .Minor }}"

Dockerfile

@@ -0,0 +1,5 @@
+FROM alpine
+MAINTAINER Philipp C. Heckel <philipp.heckel@gmail.com>
+
+COPY ntfy /usr/bin
+ENTRYPOINT ["ntfy"]

Makefile

@@ -0,0 +1,124 @@
+GO=$(shell which go)
+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
+	@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
+	@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
+	@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
+	@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"
+
+
+# Test/check targets
+
+check: test fmt-check vet lint staticcheck
+
+test: .PHONY
+	$(GO) test ./...
+
+race: .PHONY
+	$(GO) test -race ./...
+
+coverage:
+	mkdir -p build/coverage
+	$(GO) test -race -coverprofile=build/coverage/coverage.txt -covermode=atomic ./...
+	$(GO) tool cover -func build/coverage/coverage.txt
+
+coverage-html:
+	mkdir -p build/coverage
+	$(GO) test -race -coverprofile=build/coverage/coverage.txt -covermode=atomic ./...
+	$(GO) tool cover -html build/coverage/coverage.txt
+
+coverage-upload:
+	cd build/coverage && (curl -s https://codecov.io/bash | bash)
+
+# Lint/formatting targets
+
+fmt:
+	$(GO) fmt ./...
+
+fmt-check:
+	test -z $(shell gofmt -l .)
+
+vet:
+	$(GO) vet ./...
+
+lint:
+	which golint || $(GO) get -u golang.org/x/lint/golint
+	$(GO) list ./... | grep -v /vendor/ | xargs -L1 golint -set_exit_status
+
+staticcheck: .PHONY
+	rm -rf build/staticcheck
+	which staticcheck || go get honnef.co/go/tools/cmd/staticcheck
+	mkdir -p build/staticcheck
+	ln -s "$(GO)" build/staticcheck/go
+	PATH="$(PWD)/build/staticcheck:$(PATH)" staticcheck ./...
+	rm -rf build/staticcheck
+
+# Building targets
+
+build: .PHONY
+	goreleaser build --rm-dist
+
+build-snapshot:
+	goreleaser build --snapshot --rm-dist
+
+build-simple: clean
+	mkdir -p dist/ntfy_linux_amd64
+	$(GO) build \
+		-o dist/ntfy_linux_amd64/ntfy \
+		-ldflags \
+		"-s -w -X main.version=$(VERSION) -X main.commit=$(shell git rev-parse --short HEAD) -X main.date=$(shell date +%s)"
+
+clean: .PHONY
+	rm -rf dist build
+
+
+# Releasing targets
+
+release:
+	goreleaser release --rm-dist
+
+release-snapshot:
+	goreleaser release --snapshot --skip-publish --rm-dist
+
+
+# Installing targets
+
+install:
+	sudo rm -f /usr/bin/ntfy
+	sudo cp -a dist/ntfy_linux_amd64/ntfy /usr/bin/ntfy
+
+install-deb:
+	sudo systemctl stop ntfy || true
+	sudo apt-get purge ntfy || true
+	sudo dpkg -i dist/*.deb

README.md

@@ -1,41 +1,63 @@
 # ntfy
 
-ntfy is a super simple pub-sub notification service. It allows you to send desktop and (soon) phone notifications
+ntfy (pronounce: *notify*) is a super simple pub-sub notification service. It allows you to send desktop and (soon) phone notifications
-via scripts. I run a free version of it on *[ntfy.sh](https://ntfy.sh)*. No signups or cost.
+via scripts. I run a free version of it on *[ntfy.sh](https://ntfy.sh)*. **No signups or cost.**
 
 ## Usage
 
 ### Subscribe to a topic
+You can subscribe to a topic either in a web UI, or in your own app by subscribing to an 
+[SSE](https://en.wikipedia.org/wiki/Server-sent_events)/[EventSource](https://developer.mozilla.org/en-US/docs/Web/API/EventSource),
+or a JSON or raw feed.  
 
-You can subscribe to a topic either in a web UI, or in your own app by subscribing to an SSE/EventSource
+Here's how to see the raw/json/sse stream in `curl`. This will subscribe to the topic and wait for events.
-or JSON feed. 
-
-Here's how to do it via curl see the SSE stream in `curl`:
 
 ```
-curl -s localhost:9997/mytopic/sse
+# Subscribe to "mytopic" and output one message per line (\n are replaced with a space)
+curl -s ntfy.sh/mytopic/raw
+
+# Subscribe to "mytopic" and output one JSON message per line
+curl -s ntfy.sh/mytopic/json
+
+# Subscribe to "mytopic" and output an SSE stream (supported via JS/EventSource)
+curl -s ntfy.sh/mytopic/sse
 ```
 
-You can easily script it to execute any command when a message arrives:
+You can easily script it to execute any command when a message arrives. This sends desktop notifications (just like 
+the web UI, but without it):
 ```
-while read json; do 
+while read msg; do 
-  msg="$(echo "$json" | jq -r .message)"
   notify-send "$msg"
-done < <(stdbuf -i0 -o0 curl -s localhost:9997/mytopic/json)
+done < <(stdbuf -i0 -o0 curl -s ntfy.sh/mytopic/raw)
 ```
 
 ### Publish messages
-
 Publishing messages can be done via PUT or POST using. Here's an example using `curl`:
 ```
 curl -d "long process is done" ntfy.sh/mytopic
 ```
 
+Messages published to a non-existing topic or a topic without subscribers will not be delivered later. There is (currently)
+no buffering of any kind. If you're not listening, the message won't be delivered.
+
+## FAQ
+
+### Isn't this like ...?
+Probably. I didn't do a whole lot of research before making this.
+
+### Can I use this in my app?
+Yes. As long as you don't abuse it, it'll be available and free of charge.
+
+### What are the uptime guarantees?
+Best effort.
+
+### Why is the web UI so ugly?
+I don't particularly like JS or dealing with CSS. I'll make it pretty after it's functional.
+
 ## TODO
-- /raw endpoint
-- netcat usage
 - rate limiting / abuse protection
 - release/packaging
+- add HTTPS
 
 ## Contributing
 I welcome any and all contributions. Just create a PR or an issue.

cmd/app.go

@@ -0,0 +1,73 @@
+// Package cmd provides the ntfy CLI application
+package cmd
+
+import (
+	"fmt"
+	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v2/altsrc"
+	"heckel.io/ntfy/config"
+	"heckel.io/ntfy/server"
+	"log"
+	"os"
+)
+
+// New creates a new CLI application
+func New() *cli.App {
+	flags := []cli.Flag{
+		&cli.StringFlag{Name: "config", Aliases: []string{"c"}, EnvVars: []string{"NTFY_CONFIG_FILE"}, Value: "/etc/ntfy/config.yml", DefaultText: "/etc/ntfy/config.yml", Usage: "config file"},
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-http", Aliases: []string{"l"}, EnvVars: []string{"NTFY_LISTEN_HTTP"}, Value: config.DefaultListenHTTP, Usage: "ip:port used to as listen address"}),
+	}
+	return &cli.App{
+		Name:                   "ntfy",
+		Usage:                  "Simple pub-sub notification service",
+		UsageText:              "ntfy [OPTION..]",
+		HideHelp:               true,
+		HideVersion:            true,
+		EnableBashCompletion:   true,
+		UseShortOptionHandling: true,
+		Reader:                 os.Stdin,
+		Writer:                 os.Stdout,
+		ErrWriter:              os.Stderr,
+		Action:                 execRun,
+		Before:                 initConfigFileInputSource("config", flags),
+		Flags:                  flags,
+	}
+}
+
+func execRun(c *cli.Context) error {
+	// Read all the options
+	listenHTTP := c.String("listen-http")
+
+	// Run main bot, can be killed by signal
+	conf := config.New(listenHTTP)
+	s := server.New(conf)
+	if err := s.Run(); err != nil {
+		log.Fatalln(err)
+	}
+
+	log.Printf("Exiting.")
+	return nil
+}
+
+// initConfigFileInputSource is like altsrc.InitInputSourceWithContext and altsrc.NewYamlSourceFromFlagFunc, but checks
+// if the config flag is exists and only loads it if it does. If the flag is set and the file exists, it fails.
+func initConfigFileInputSource(configFlag string, flags []cli.Flag) cli.BeforeFunc {
+	return func(context *cli.Context) error {
+		configFile := context.String(configFlag)
+		if context.IsSet(configFlag) && !fileExists(configFile) {
+			return fmt.Errorf("config file %s does not exist", configFile)
+		} else if !context.IsSet(configFlag) && !fileExists(configFile) {
+			return nil
+		}
+		inputSource, err := altsrc.NewYamlSourceFromFile(configFile)
+		if err != nil {
+			return err
+		}
+		return altsrc.ApplyInputSourceValues(context, inputSource, flags)
+	}
+}
+
+func fileExists(filename string) bool {
+	stat, _ := os.Stat(filename)
+	return stat != nil
+}

config/config.go

@@ -0,0 +1,18 @@
+// Package config provides the main configuration
+package config
+
+const (
+	DefaultListenHTTP = ":80"
+)
+
+// Config is the main config struct for the application. Use New to instantiate a default config struct.
+type Config struct {
+	ListenHTTP string
+}
+
+// New instantiates a default new config
+func New(listenHTTP string) *Config {
+	return &Config{
+		ListenHTTP: listenHTTP,
+	}
+}

config/config.yml

@@ -0,0 +1,9 @@
+# ntfy config file
+
+# Listen address for the HTTP web server
+#
+# Format:    <hostname>:<port>
+# Default:   :80
+# Required:  No
+#
+# listen-http: ":80"

config/ntfy.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=ntfy server
+After=network.target
+
+[Service]
+ExecStart=/usr/bin/ntfy
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target

go.mod

@@ -1,5 +1,10 @@
-module heckel.io/notifyme
+module heckel.io/ntfy
 
 go 1.16
 
-require github.com/gorilla/websocket v1.4.2 // indirect
+require (
+	github.com/BurntSushi/toml v0.4.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
+	github.com/urfave/cli/v2 v2.3.0
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)

go.sum

@@ -1,2 +1,23 @@
-github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
-github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw=
+github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.1 h1:r/myEWzV9lfsM1tFLgDyu0atFtJ1fXn261LKYj/3DxU=
+github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
+github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+github.com/urfave/cli/v2 v2.3.0 h1:qph92Y649prgesehzOrQjdWyxFOp/QVM+6imKHad91M=
+github.com/urfave/cli/v2 v2.3.0/go.mod h1:LJmUH05zAU44vOAcrfzZQKsZbVcdbOG8rtL3/XcUArI=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.3 h1:fvjTMHxHEw/mxHbtzPi3JCcKXQRAnQTBRo6YCJSVHKI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

main.go

@@ -1,13 +1,32 @@
 package main
 
 import (
-	"heckel.io/notifyme/server"
+	"fmt"
-	"log"
+	"github.com/urfave/cli/v2"
+	"heckel.io/ntfy/cmd"
+	"os"
+	"runtime"
+)
+
+var (
+	version = "dev"
+	commit  = "unknown"
+	date    = "unknown"
 )
 
 func main() {
-	s := server.New()
+	cli.AppHelpTemplate += fmt.Sprintf(`
-	if err := s.Run(); err != nil {
+Try 'ntfy COMMAND --help' for more information.
-		log.Fatalln(err)
+
+ntfy %s (%s), runtime %s, built at %s
+Copyright (C) 2021 Philipp C. Heckel, distributed under the Apache License 2.0
+`, version, commit[:7], runtime.Version(), date)
+
+	app := cmd.New()
+	app.Version = version
+
+	if err := app.Run(os.Args); err != nil {
+		fmt.Fprintln(os.Stderr, err.Error())
+		os.Exit(1)
 	}
 }

scripts/postrm.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+set -eu
+systemctl stop ntfy >/dev/null 2>&1 || true
+if [ "$1" = "purge" ]; then
+  rm -rf /etc/ntfy
+fi

server/index.html

@@ -3,37 +3,45 @@
 <head>
     <title>ntfy.sh</title>
     <style>
+        body { font-size: 1.3em; line-height: 140%; }
+        #error { color: darkred; font-style: italic; }
+        #main { max-width: 800px; margin: 0 auto; }
     </style>
 </head>
 <body>
-<h1>ntfy.sh</h1>
+<div id="main">
+    <h1>ntfy.sh</h1>
 
-<p>
+    <p>
-    ntfy.sh is a super simple pub-sub notification service. It allows you to send desktop and (soon) phone notifications
+        <b>ntfy</b> (pronounce: <i>notify</i>) is a simple HTTP-based pub-sub notification service. It allows you to send desktop and (soon) phone notifications
-    via scripts, without signup or cost. It's entirely free and open source. You can find the source code <a href="https://github.com/binwiederhier/ntfy">on GitHub</a>.
+        via scripts, without signup or cost. It's entirely free and open source. You can find the source code <a href="https://github.com/binwiederhier/ntfy">on GitHub</a>.
-</p>
+    </p>
 
-<p>
+    <p>
-    You can subscribe to a topic either in this web UI, or in your own app by subscribing to an SSE/EventSource
+        You can subscribe to a topic either in this web UI, or in your own app by subscribing to an SSE/EventSource
-    or JSON feed. Once subscribed, you can publish messages via PUT or POST.
+        or JSON feed. Once subscribed, you can publish messages via PUT or POST.
-</p>
+    </p>
 
-<p id="error"></p>
+    <p id="error"></p>
 
-<form id="subscribeForm">
+    <form id="subscribeForm">
-    <input type="text" id="topicField" size="64" autofocus />
+        <p>
-    <input type="submit" id="subscribeButton" value="Subscribe topic" />
+            <input type="text" id="topicField" size="64" placeholder="Topic ID (letters, numbers, _ and -)"  pattern="[-_A-Za-z]{1,64}" autofocus />
-</form>
+            <input type="submit" id="subscribeButton" value="Subscribe topic" />
+        </p>
+    </form>
 
-<p>Topics:</p>
+    <p id="topicsHeader"><b>Subscribed topics:</b></p>
-<ul id="topicsList">
+    <ul id="topicsList"></ul>
-</ul>
+
+</div>
 
 <script type="text/javascript">
     let topics = {};
 
-    const topicField = document.getElementById("topicField");
+    const topicsHeader = document.getElementById("topicsHeader");
     const topicsList = document.getElementById("topicsList");
+    const topicField = document.getElementById("topicField");
     const subscribeButton = document.getElementById("subscribeButton");
     const subscribeForm = document.getElementById("subscribeForm");
     const errorField = document.getElementById("error");
@@ -43,6 +51,8 @@
             Notification.requestPermission().then((permission) => {
                 if (permission === "granted") {
                     subscribeInternal(topic, 0);
+                } else {
+                    showNotificationDeniedError();
                 }
             });
         } else {
@@ -60,6 +70,7 @@
                 topicEntry.innerHTML = `${topic} <button onclick="unsubscribe('${topic}')">Unsubscribe</button>`;
                 topicsList.appendChild(topicEntry);
             }
+            topicsHeader.style.display = '';
 
             // Open event source
             let eventSource = new EventSource(`${topic}/sse`);
@@ -68,7 +79,6 @@
                 delaySec = 0; // Reset on successful connection
             };
             eventSource.onerror = (e) => {
-                console.log("onerror")
                 const newDelaySec = (delaySec + 5 <= 30) ? delaySec + 5 : 30;
                 topicEntry.innerHTML = `${topic} <i>(Reconnecting in ${newDelaySec}s ...)</i> <button onclick="unsubscribe('${topic}')">Unsubscribe</button>`;
                 eventSource.close()
@@ -88,6 +98,23 @@
         delete topics[topic];
         localStorage.setItem('topics', JSON.stringify(Object.keys(topics)));
         document.getElementById(`topic-${topic}`).remove();
+        if (Object.keys(topics).length === 0) {
+            topicsHeader.style.display = 'none';
+        }
+    };
+
+    const showError = (msg) => {
+        errorField.innerHTML = msg;
+        topicField.disabled = true;
+        subscribeButton.disabled = true;
+    };
+
+    const showBrowserIncompatibleError = () => {
+        showError("Your browser is not compatible to use the web-based desktop notifications.");
+    };
+
+    const showNotificationDeniedError = () => {
+        showError("You have blocked desktop notifications for this website. Please unblock them and refresh to use the web-based desktop notifications.");
     };
 
     subscribeForm.onsubmit = function () {
@@ -101,13 +128,9 @@
 
     // Disable Web UI if notifications of EventSource are not available
     if (!window["Notification"] || !window["EventSource"]) {
-        errorField.innerHTML = "Your browser is not compatible to use the web-based desktop notifications.";
+        showBrowserIncompatibleError();
-        topicField.disabled = true;
-        subscribeButton.disabled = true;
     } else if (Notification.permission === "denied") {
-        errorField.innerHTML = "You have blocked desktop notifications for this website. Please unblock them and refresh to use the web-based desktop notifications.";
+        showNotificationDeniedError();
-        topicField.disabled = true;
-        subscribeButton.disabled = true;
     }
 
     // Reset UI
@@ -115,10 +138,14 @@
 
     // Restore topics
     const storedTopics = localStorage.getItem('topics');
-    if (storedTopics) {
+    if (storedTopics && Notification.permission === "granted") {
-        JSON.parse(storedTopics).forEach((topic) => {
+        const storedTopicsArray = JSON.parse(storedTopics)
-            subscribeInternal(topic, 0);
+        storedTopicsArray.forEach((topic) => { subscribeInternal(topic, 0); });
-        });
+        if (storedTopicsArray.length === 0) {
+            topicsHeader.style.display = 'none';
+        }
+    } else {
+        topicsHeader.style.display = 'none';
     }
 </script>
 

server/server.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"heckel.io/ntfy/config"
 	"io"
 	"log"
 	"net/http"
@@ -16,6 +17,7 @@ import (
 )
 
 type Server struct {
+	config *config.Config
 	topics map[string]*topic
 	mu     sync.Mutex
 }
@@ -33,13 +35,17 @@ var (
 	topicRegex = regexp.MustCompile(`^/[^/]+$`)
 	jsonRegex  = regexp.MustCompile(`^/[^/]+/json$`)
 	sseRegex   = regexp.MustCompile(`^/[^/]+/sse$`)
+	rawRegex   = regexp.MustCompile(`^/[^/]+/raw$`)
 
 	//go:embed "index.html"
 	indexSource string
+
+	errTopicNotFound = errors.New("topic not found")
 )
 
-func New() *Server {
+func New(conf *config.Config) *Server {
 	return &Server{
+		config: conf,
 		topics: make(map[string]*topic),
 	}
 }
@@ -50,23 +56,22 @@ func (s *Server) Run() error {
 }
 
 func (s *Server) listenAndServe() error {
-	log.Printf("Listening on :9997")
+	log.Printf("Listening on %s", s.config.ListenHTTP)
 	http.HandleFunc("/", s.handle)
-	return http.ListenAndServe(":9997", nil)
+	return http.ListenAndServe(s.config.ListenHTTP, nil)
 }
 
 func (s *Server) runMonitor() {
 	for {
-		time.Sleep(5 * time.Second)
+		time.Sleep(30 * time.Second)
 		s.mu.Lock()
-		log.Printf("topics: %d", len(s.topics))
+		var subscribers, messages int
 		for _, t := range s.topics {
-			t.mu.Lock()
+			subs, msgs := t.Stats()
-			log.Printf("- %s: %d subscriber(s), %d message(s) sent, last active = %s",
+			subscribers += subs
-				t.id, len(t.subscribers), t.messages, t.last.String())
+			messages += msgs
-			t.mu.Unlock()
 		}
-		// TODO kill dead topics
+		log.Printf("Stats: %d topic(s), %d subscriber(s), %d message(s) sent", len(s.topics), subscribers, messages)
 		s.mu.Unlock()
 	}
 }
@@ -74,7 +79,7 @@ func (s *Server) runMonitor() {
 func (s *Server) handle(w http.ResponseWriter, r *http.Request) {
 	if err := s.handleInternal(w, r); err != nil {
 		w.WriteHeader(http.StatusInternalServerError)
-		_, _ = io.WriteString(w, err.Error())
+		_, _ = io.WriteString(w, err.Error()+"\n")
 	}
 }
 
@@ -85,6 +90,8 @@ func (s *Server) handleInternal(w http.ResponseWriter, r *http.Request) error {
 		return s.handleSubscribeJSON(w, r)
 	} else if r.Method == http.MethodGet && sseRegex.MatchString(r.URL.Path) {
 		return s.handleSubscribeSSE(w, r)
+	} else if r.Method == http.MethodGet && rawRegex.MatchString(r.URL.Path) {
+		return s.handleSubscribeRaw(w, r)
 	} else if (r.Method == http.MethodPut || r.Method == http.MethodPost) && topicRegex.MatchString(r.URL.Path) {
 		return s.handlePublishHTTP(w, r)
 	}
@@ -125,7 +132,7 @@ func (s *Server) handleSubscribeJSON(w http.ResponseWriter, r *http.Request) err
 		}
 		return nil
 	})
-	defer t.Unsubscribe(subscriberID)
+	defer s.unsubscribe(t, subscriberID)
 	select {
 	case <-t.ctx.Done():
 	case <-r.Context().Done():
@@ -149,7 +156,7 @@ func (s *Server) handleSubscribeSSE(w http.ResponseWriter, r *http.Request) erro
 		}
 		return nil
 	})
-	defer t.Unsubscribe(subscriberID)
+	defer s.unsubscribe(t, subscriberID)
 	w.Header().Set("Content-Type", "text/event-stream")
 	w.WriteHeader(http.StatusOK)
 	if _, err := io.WriteString(w, "event: open\n\n"); err != nil {
@@ -165,6 +172,26 @@ func (s *Server) handleSubscribeSSE(w http.ResponseWriter, r *http.Request) erro
 	return nil
 }
 
+func (s *Server) handleSubscribeRaw(w http.ResponseWriter, r *http.Request) error {
+	t := s.createTopic(strings.TrimSuffix(r.URL.Path[1:], "/raw")) // Hack
+	subscriberID := t.Subscribe(func(msg *message) error {
+		m := strings.ReplaceAll(msg.Message, "\n", " ") + "\n"
+		if _, err := io.WriteString(w, m); err != nil {
+			return err
+		}
+		if fl, ok := w.(http.Flusher); ok {
+			fl.Flush()
+		}
+		return nil
+	})
+	defer s.unsubscribe(t, subscriberID)
+	select {
+	case <-t.ctx.Done():
+	case <-r.Context().Done():
+	}
+	return nil
+}
+
 func (s *Server) createTopic(id string) *topic {
 	s.mu.Lock()
 	defer s.mu.Unlock()
@@ -179,7 +206,15 @@ func (s *Server) topic(topicID string) (*topic, error) {
 	defer s.mu.Unlock()
 	c, ok := s.topics[topicID]
 	if !ok {
-		return nil, errors.New("topic does not exist")
+		return nil, errTopicNotFound
 	}
 	return c, nil
 }
+
+func (s *Server) unsubscribe(t *topic, subscriberID int) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if subscribers := t.Unsubscribe(subscriberID); subscribers == 0 {
+		delete(s.topics, t.id)
+	}
+}

server/topic.go

@@ -41,10 +41,11 @@ func (t *topic) Subscribe(s subscriber) int {
 	return subscriberID
 }
 
-func (t *topic) Unsubscribe(id int) {
+func (t *topic) Unsubscribe(id int) int {
 	t.mu.Lock()
 	defer t.mu.Unlock()
 	delete(t.subscribers, id)
+	return len(t.subscribers)
 }
 
 func (t *topic) Publish(m *message) error {
@@ -57,12 +58,18 @@ func (t *topic) Publish(m *message) error {
 	t.messages++
 	for _, s := range t.subscribers {
 		if err := s(m); err != nil {
-			log.Printf("error publishing message to subscriber x")
+			log.Printf("error publishing message to subscriber")
 		}
 	}
 	return nil
 }
 
+func (t *topic) Stats() (subscribers int, messages int) {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return len(t.subscribers), t.messages
+}
+
 func (t *topic) Close() {
 	t.cancel()
 }