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ntfy/cmd/publish.go

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package cmd
import (
"errors"
"fmt"
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"github.com/urfave/cli/v2"
"heckel.io/ntfy/client"
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"heckel.io/ntfy/log"
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"heckel.io/ntfy/util"
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"io"
"os"
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"os/exec"
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"path/filepath"
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"strings"
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"time"
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)
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func init() {
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commands = append(commands, cmdPublish)
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}
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var flagsPublish = append(
flagsDefault,
&cli.StringFlag{Name: "config", Aliases: []string{"c"}, EnvVars: []string{"NTFY_CONFIG"}, Usage: "client config file"},
&cli.StringFlag{Name: "title", Aliases: []string{"t"}, EnvVars: []string{"NTFY_TITLE"}, Usage: "message title"},
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&cli.StringFlag{Name: "message", Aliases: []string{"m"}, EnvVars: []string{"NTFY_MESSAGE"}, Usage: "message body"},
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&cli.StringFlag{Name: "priority", Aliases: []string{"p"}, EnvVars: []string{"NTFY_PRIORITY"}, Usage: "priority of the message (1=min, 2=low, 3=default, 4=high, 5=max)"},
&cli.StringFlag{Name: "tags", Aliases: []string{"tag", "T"}, EnvVars: []string{"NTFY_TAGS"}, Usage: "comma separated list of tags and emojis"},
&cli.StringFlag{Name: "delay", Aliases: []string{"at", "in", "D"}, EnvVars: []string{"NTFY_DELAY"}, Usage: "delay/schedule message"},
&cli.StringFlag{Name: "click", Aliases: []string{"U"}, EnvVars: []string{"NTFY_CLICK"}, Usage: "URL to open when notification is clicked"},
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&cli.StringFlag{Name: "icon", Aliases: []string{"i"}, EnvVars: []string{"NTFY_ICON"}, Usage: "URL to use as notification icon"},
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&cli.StringFlag{Name: "actions", Aliases: []string{"A"}, EnvVars: []string{"NTFY_ACTIONS"}, Usage: "actions JSON array or simple definition"},
&cli.StringFlag{Name: "attach", Aliases: []string{"a"}, EnvVars: []string{"NTFY_ATTACH"}, Usage: "URL to send as an external attachment"},
&cli.StringFlag{Name: "filename", Aliases: []string{"name", "n"}, EnvVars: []string{"NTFY_FILENAME"}, Usage: "filename for the attachment"},
&cli.StringFlag{Name: "file", Aliases: []string{"f"}, EnvVars: []string{"NTFY_FILE"}, Usage: "file to upload as an attachment"},
&cli.StringFlag{Name: "email", Aliases: []string{"mail", "e"}, EnvVars: []string{"NTFY_EMAIL"}, Usage: "also send to e-mail address"},
&cli.StringFlag{Name: "user", Aliases: []string{"u"}, EnvVars: []string{"NTFY_USER"}, Usage: "username[:password] used to auth against the server"},
&cli.IntFlag{Name: "wait-pid", Aliases: []string{"wait_pid", "pid"}, EnvVars: []string{"NTFY_WAIT_PID"}, Usage: "wait until PID exits before publishing"},
&cli.BoolFlag{Name: "wait-cmd", Aliases: []string{"wait_cmd", "cmd", "done"}, EnvVars: []string{"NTFY_WAIT_CMD"}, Usage: "run command and wait until it finishes before publishing"},
&cli.BoolFlag{Name: "no-cache", Aliases: []string{"no_cache", "C"}, EnvVars: []string{"NTFY_NO_CACHE"}, Usage: "do not cache message server-side"},
&cli.BoolFlag{Name: "no-firebase", Aliases: []string{"no_firebase", "F"}, EnvVars: []string{"NTFY_NO_FIREBASE"}, Usage: "do not forward message to Firebase"},
&cli.BoolFlag{Name: "env-topic", Aliases: []string{"env_topic", "P"}, EnvVars: []string{"NTFY_ENV_TOPIC"}, Usage: "use topic from NTFY_TOPIC env variable"},
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&cli.BoolFlag{Name: "quiet", Aliases: []string{"q"}, EnvVars: []string{"NTFY_QUIET"}, Usage: "do not print message"},
)
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var cmdPublish = &cli.Command{
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Name: "publish",
Aliases: []string{"pub", "send", "trigger"},
Usage: "Send message via a ntfy server",
UsageText: `ntfy publish [OPTIONS..] TOPIC [MESSAGE...]
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ntfy publish [OPTIONS..] --wait-cmd COMMAND...
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NTFY_TOPIC=.. ntfy publish [OPTIONS..] -P [MESSAGE...]`,
Action: execPublish,
Category: categoryClient,
Flags: flagsPublish,
Before: initLogFunc,
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Description: `Publish a message to a ntfy server.
Examples:
ntfy publish mytopic This is my message # Send simple message
ntfy send myserver.com/mytopic "This is my message" # Send message to different default host
ntfy pub -p high backups "Backups failed" # Send high priority message
ntfy pub --tags=warning,skull backups "Backups failed" # Add tags/emojis to message
ntfy pub --delay=10s delayed_topic Laterzz # Delay message by 10s
ntfy pub --at=8:30am delayed_topic Laterzz # Send message at 8:30am
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ntfy pub -e phil@example.com alerts 'App is down!' # Also send email to phil@example.com
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ntfy pub --click="https://reddit.com" redd 'New msg' # Opens Reddit when notification is clicked
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ntfy pub --icon="http://some.tld/icon.png" 'Icon!' # Send notification with custom icon
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ntfy pub --attach="http://some.tld/file.zip" files # Send ZIP archive from URL as attachment
ntfy pub --file=flower.jpg flowers 'Nice!' # Send image.jpg as attachment
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ntfy pub -u phil:mypass secret Psst # Publish with username/password
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ntfy pub --wait-pid 1234 mytopic # Wait for process 1234 to exit before publishing
ntfy pub --wait-cmd mytopic rsync -av ./ /tmp/a # Run command and publish after it completes
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NTFY_USER=phil:mypass ntfy pub secret Psst # Use env variables to set username/password
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NTFY_TOPIC=mytopic ntfy pub -P "some message" # Use NTFY_TOPIC variable as topic
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cat flower.jpg | ntfy pub --file=- flowers 'Nice!' # Same as above, send image.jpg as attachment
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ntfy trigger mywebhook # Sending without message, useful for webhooks
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Please also check out the docs on publishing messages. Especially for the --tags and --delay options,
it has incredibly useful information: https://ntfy.sh/docs/publish/.
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` + clientCommandDescriptionSuffix,
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}
func execPublish(c *cli.Context) error {
conf, err := loadConfig(c)
if err != nil {
return err
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}
title := c.String("title")
priority := c.String("priority")
tags := c.String("tags")
delay := c.String("delay")
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click := c.String("click")
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icon := c.String("icon")
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actions := c.String("actions")
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attach := c.String("attach")
filename := c.String("filename")
file := c.String("file")
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email := c.String("email")
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user := c.String("user")
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noCache := c.Bool("no-cache")
noFirebase := c.Bool("no-firebase")
quiet := c.Bool("quiet")
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pid := c.Int("wait-pid")
topic, message, command, err := parseTopicMessageCommand(c)
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if err != nil {
return err
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}
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var options []client.PublishOption
if title != "" {
options = append(options, client.WithTitle(title))
}
if priority != "" {
options = append(options, client.WithPriority(priority))
}
if tags != "" {
options = append(options, client.WithTagsList(tags))
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}
if delay != "" {
options = append(options, client.WithDelay(delay))
}
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if click != "" {
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options = append(options, client.WithClick(click))
}
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if icon != "" {
options = append(options, client.WithIcon(icon))
}
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if actions != "" {
options = append(options, client.WithActions(strings.ReplaceAll(actions, "\n", " ")))
}
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if attach != "" {
options = append(options, client.WithAttach(attach))
}
if filename != "" {
options = append(options, client.WithFilename(filename))
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}
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if email != "" {
options = append(options, client.WithEmail(email))
}
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if noCache {
options = append(options, client.WithNoCache())
}
if noFirebase {
options = append(options, client.WithNoFirebase())
}
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if user != "" {
var pass string
parts := strings.SplitN(user, ":", 2)
if len(parts) == 2 {
user = parts[0]
pass = parts[1]
} else {
fmt.Fprint(c.App.ErrWriter, "Enter Password: ")
p, err := util.ReadPassword(c.App.Reader)
if err != nil {
return err
}
pass = string(p)
fmt.Fprintf(c.App.ErrWriter, "\r%s\r", strings.Repeat(" ", 20))
}
options = append(options, client.WithBasicAuth(user, pass))
}
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if pid > 0 {
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newMessage, err := waitForProcess(pid)
if err != nil {
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return err
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} else if message == "" {
message = newMessage
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}
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} else if len(command) > 0 {
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newMessage, err := runAndWaitForCommand(command)
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if err != nil {
return err
} else if message == "" {
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message = newMessage
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}
}
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var body io.Reader
if file == "" {
body = strings.NewReader(message)
} else {
if message != "" {
options = append(options, client.WithMessage(message))
}
if file == "-" {
if filename == "" {
options = append(options, client.WithFilename("stdin"))
}
body = c.App.Reader
} else {
if filename == "" {
options = append(options, client.WithFilename(filepath.Base(file)))
}
body, err = os.Open(file)
if err != nil {
return err
}
}
}
cl := client.New(conf)
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m, err := cl.PublishReader(topic, body, options...)
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if err != nil {
return err
}
if !quiet {
fmt.Fprintln(c.App.Writer, strings.TrimSpace(m.Raw))
}
return nil
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}
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// parseTopicMessageCommand reads the topic and the remaining arguments from the context.
// There are a few cases to consider:
// ntfy publish <topic> [<message>]
// ntfy publish --wait-cmd <topic> <command>
// NTFY_TOPIC=.. ntfy publish [<message>]
// NTFY_TOPIC=.. ntfy publish --wait-cmd <command>
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func parseTopicMessageCommand(c *cli.Context) (topic string, message string, command []string, err error) {
var args []string
topic, args, err = parseTopicAndArgs(c)
if err != nil {
return
}
if c.Bool("wait-cmd") {
if len(args) == 0 {
err = errors.New("must specify command when --wait-cmd is passed, type 'ntfy publish --help' for help")
return
}
command = args
} else {
message = strings.Join(args, " ")
}
if c.String("message") != "" {
message = c.String("message")
}
return
}
func parseTopicAndArgs(c *cli.Context) (topic string, args []string, err error) {
envTopic := c.Bool("env-topic")
if envTopic {
fmt.Fprintln(c.App.ErrWriter, "\x1b[1;33mDeprecation notice: The --env-topic/-P flag will be removed in July 2022, see https://ntfy.sh/docs/deprecations/ for details.\x1b[0m")
topic = os.Getenv("NTFY_TOPIC")
if topic == "" {
return "", nil, errors.New("when --env-topic is passed, must define NTFY_TOPIC environment variable")
}
return topic, remainingArgs(c, 0), nil
}
if c.NArg() < 1 {
return "", nil, errors.New("must specify topic, type 'ntfy publish --help' for help")
}
return c.Args().Get(0), remainingArgs(c, 1), nil
}
func remainingArgs(c *cli.Context, fromIndex int) []string {
if c.NArg() > fromIndex {
return c.Args().Slice()[fromIndex:]
}
return []string{}
}
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func waitForProcess(pid int) (message string, err error) {
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if !processExists(pid) {
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return "", fmt.Errorf("process with PID %d not running", pid)
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}
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start := time.Now()
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log.Debug("Waiting for process with PID %d to exit", pid)
for processExists(pid) {
time.Sleep(500 * time.Millisecond)
}
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runtime := time.Since(start).Round(time.Millisecond)
log.Debug("Process with PID %d exited after %s", pid, runtime)
return fmt.Sprintf("Process with PID %d exited after %s", pid, runtime), nil
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}
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func runAndWaitForCommand(command []string) (message string, err error) {
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prettyCmd := util.QuoteCommand(command)
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log.Debug("Running command: %s", prettyCmd)
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start := time.Now()
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cmd := exec.Command(command[0], command[1:]...)
if log.IsTrace() {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
}
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err = cmd.Run()
runtime := time.Since(start).Round(time.Millisecond)
if err != nil {
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if exitError, ok := err.(*exec.ExitError); ok {
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log.Debug("Command failed after %s (exit code %d): %s", runtime, exitError.ExitCode(), prettyCmd)
return fmt.Sprintf("Command failed after %s (exit code %d): %s", runtime, exitError.ExitCode(), prettyCmd), nil
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}
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// Hard fail when command does not exist or could not be properly launched
return "", fmt.Errorf("command failed: %s, error: %s", prettyCmd, err.Error())
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}
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log.Debug("Command succeeded after %s: %s", runtime, prettyCmd)
return fmt.Sprintf("Command succeeded after %s: %s", runtime, prettyCmd), nil
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}