gorush

A push notification micro server using Gin framework written in Go (Golang).

Contents

• Support Platform
• Features
• Memory Usage
• Basic Usage
  • Download a binary
  • Command Usage
  • Send Android notification
  • Send iOS notification
• Run gorush web server
• Web API
  • GET /api/stat/go
  • GET /api/stat/app
  • GET /sys/stats
  • POST /api/push
  • Request body
  • iOS alert payload
  • Android notification payload
  • iOS Example
  • Android Example
  • Response body
• Run gRPC service
• Run gorush in Docker
• Run gorush in Kubernetes
• License

Support Platform

• APNS
• FCM

Features

• Support Firebase Cloud Messaging using go-fcm library for Android.
• Support HTTP/2 Apple Push Notification Service using apns2 library.
• Support YAML configuration.
• Support command line to send single Android or iOS notification.
• Support Web API to send push notification.
• Support graceful restart & zero downtime deploy using facebook grace.
• Support HTTP/2 or HTTP/1.1 protocol.
• Support notification queue and multiple workers.
• Support /api/stat/app show notification success and failure counts.
• Support /api/config show your YAML config.
• Support store app stat to memory, Redis, BoltDB, BuntDB or LevelDB.
• Support p12 or pem formtat of iOS certificate file.
• Support /sys/stats show response time, status code count, etc.
• Support for HTTP proxy to Google server (FCM).
• Support retry send notification if server response is fail.
• Support expose prometheus metrics.
• Support install TLS certificates from Let's Encrypt automatically.
• Support send notification through RPC protocol, we use gRPC as default framework.

See the default YAML config example:

core:
  enabled: true # enabale httpd server
  address: "" # ip address to bind (default: any)
  port: "8088" # ignore this port number if auto_tls is enabled (listen 443).
  worker_num: 0 # default worker number is runtime.NumCPU()
  queue_num: 0 # default queue number is 8192
  max_notification: 100
  sync: false # set true if you need get error message from fail push notification in API response.
  mode: "release"
  ssl: false
  cert_path: "cert.pem"
  key_path: "key.pem"
  http_proxy: "" # only working for FCM server
  pid:
    enabled: false
    path: "gorush.pid"
    override: true
  auto_tls:
    enabled: false # Automatically install TLS certificates from Let's Encrypt.
    folder: ".cache" # folder for storing TLS certificates
    host: "" # which domains the Let's Encrypt will attempt

grpc:
  enabled: false # enabale gRPC server
  port: 9000

api:
  push_uri: "/api/push"
  stat_go_uri: "/api/stat/go"
  stat_app_uri: "/api/stat/app"
  config_uri: "/api/config"
  sys_stat_uri: "/sys/stats"
  metric_uri: "/metrics"

android:
  enabled: true
  apikey: "YOUR_API_KEY"
  max_retry: 0 # resend fail notification, default value zero is disabled

ios:
  enabled: false
  key_path: "key.pem"
  password: "" # certificate password, default as empty string.
  production: false
  max_retry: 0 # resend fail notification, default value zero is disabled
  key_id: "" # KeyID from developer account (Certificates, Identifiers & Profiles -> Keys)
  team_id: "" # TeamID from developer account (View Account -> Membership)

log:
  format: "string" # string or json
  access_log: "stdout" # stdout: output to console, or define log path like "log/access_log"
  access_level: "debug"
  error_log: "stderr" # stderr: output to console, or define log path like "log/error_log"
  error_level: "error"
  hide_token: true

stat:
  engine: "memory" # support memory, redis, boltdb, buntdb or leveldb
  redis:
    addr: "localhost:6379"
    password: ""
    db: 0
  boltdb:
    path: "bolt.db"
    bucket: "gorush"
  buntdb:
    path: "bunt.db"
  leveldb:
    path: "level.db"

Memory Usage

Memory average usage: 28Mb (the total bytes of memory obtained from the OS.)

Test Command (We use bat as default cli tool.):

$ for i in {1..9999999}; do bat -b.N=1000 -b.C=100 POST localhost:8088/api/push notifications:=@notification.json; sleep 1;  done

Basic Usage

How to send push notification using gorush command? (Android or iOS)

Download a binary

The pre-compiled binaries can be downloaded from release page.

With Go installed

$ go get -u -v github.com/appleboy/gorush

On linux

$ wget https://github.com/appleboy/gorush/releases/download/v1.9.0/gorush-v1.9.0-linux-amd64 -O gorush

On OS X

$ wget https://github.com/appleboy/gorush/releases/download/v1.9.0/gorush-v1.9.0-darwin-amd64 -O gorush

On Windows

$ wget https://github.com/appleboy/gorush/releases/download/v1.9.0/gorush-v1.9.0-windows-amd64.exe -O gorush.exe

Command Usage

  ________                              .__
 /  _____/   ____ _______  __ __  ______|  |__
/   \  ___  /  _ \\_  __ \|  |  \/  ___/|  |  \
\    \_\  \(  <_> )|  | \/|  |  /\___ \ |   Y  \
 \______  / \____/ |__|   |____//____  >|___|  /
        \/                           \/      \/

Usage: gorush [options]

Server Options:
    -A, --address <address>          Address to bind (default: any)
    -p, --port <port>                Use port for clients (default: 8088)
    -c, --config <file>              Configuration file path
    -m, --message <message>          Notification message
    -t, --token <token>              Notification token
    -e, --engine <engine>            Storage engine (memory, redis ...)
    --title <title>                  Notification title
    --proxy <proxy>                  Proxy URL (only for GCM)
    --pid <pid path>                 Process identifier path
    --redis-addr <redis addr>        Redis addr (default: localhost:6379)
iOS Options:
    -i, --key <file>                 certificate key file path
    -P, --password <password>        certificate key password
    --ios                            enabled iOS (default: false)
    --production                     iOS production mode (default: false)
Android Options:
    -k, --apikey <api_key>           Android API Key
    --android                        enabled android (default: false)
Common Options:
    --topic <topic>                  iOS or Android topic message
    -h, --help                       Show this message
    -v, --version                    Show version

Send Android notification

Send single notification with the following command.

$ gorush -android -m "your message" -k "API Key" -t "Device token"

Send messages to topics.

$ gorush --android --topic "/topics/foo-bar" \
  -m "This is a Firebase Cloud Messaging Topic Message" \
  -k your_api_key

• -m: Notification message.
• -k: Firebase Cloud Messaging api key
• -t: Device token.
• --title: Notification title.
• --topic: Send messages to topics. note: don't add device token.
• --proxy: Set http proxy url. (only working for FCM)

Send iOS notification

Send single notification with the following command.

$ gorush -ios -m "your message" -i "your certificate path" \
  -t "device token" --topic "apns topic"

• -m: Notification message.
• -i: Apple Push Notification Certificate path (pem or p12 file).
• -t: Device token.
• --title: Notification title.
• --topic: The topic of the remote notification.
• --password: The certificate password.

The default endpoint is APNs development. Please add -production flag for APNs production push endpoint.

$ gorush -ios -m "your message" -i "your certificate path" \
  -t "device token" \
  -production

Run gorush web server

Please make sure your config.yml exist. Default port is 8088.

# for default config
$ gorush
# for custom config file
$ gorush -c config.yml

Get go status of api server using httpie tool:

$ http -v --verify=no --json GET http://localhost:8088/api/stat/go

Web API

Gorush support the following API.

• GET /api/stat/go Golang cpu, memory, gc, etc information. Thanks for golang-stats-api-handler.
• GET /api/stat/app show notification success and failure counts.
• GET /api/config show server yml config file.
• POST /api/push push ios and android notifications.

GET /api/stat/go

Golang cpu, memory, gc, etc information. Response with 200 http status code.

{
  "time": 1460686815848046600,
  "go_version": "go1.6.1",
  "go_os": "darwin",
  "go_arch": "amd64",
  "cpu_num": 4,
  "goroutine_num": 15,
  "gomaxprocs": 4,
  "cgo_call_num": 1,
  "memory_alloc": 7455192,
  "memory_total_alloc": 8935464,
  "memory_sys": 12560632,
  "memory_lookups": 17,
  "memory_mallocs": 31426,
  "memory_frees": 11772,
  "memory_stack": 524288,
  "heap_alloc": 7455192,
  "heap_sys": 8912896,
  "heap_idle": 909312,
  "heap_inuse": 8003584,
  "heap_released": 0,
  "heap_objects": 19654,
  "gc_next": 9754725,
  "gc_last": 1460686815762559700,
  "gc_num": 2,
  "gc_per_second": 0,
  "gc_pause_per_second": 0,
  "gc_pause": [
    0.326576,
    0.227096
  ]
}

GET /api/stat/app

Show success or failure counts information of notification.

{
  "version": "v1.6.2",
  "queue_max": 8192,
  "queue_usage": 0,
  "total_count": 77,
  "ios": {
    "push_success": 19,
    "push_error": 38
  },
  "android": {
    "push_success": 10,
    "push_error": 10
  }
}

GET /sys/stats

Show response time, status code count, etc.

{
  "pid": 80332,
  "uptime": "1m42.428010614s",
  "uptime_sec": 102.428010614,
  "time": "2016-06-26 12:27:11.675973571 +0800 CST",
  "unixtime": 1466915231,
  "status_code_count": { },
  "total_status_code_count": {
    "200": 5
  },
  "count": 0,
  "total_count": 5,
  "total_response_time": "10.422441ms",
  "total_response_time_sec": 0.010422441000000001,
  "average_response_time": "2.084488ms",
  "average_response_time_sec": 0.0020844880000000002
}

GET /metrics

Support expose prometheus metrics.

POST /api/push

Simple send iOS notification example, the platform value is 1:

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 1,
      "message": "Hello World iOS!"
    }
  ]
}

Simple send Android notification example, the platform value is 2:

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 2,
      "message": "Hello World Android!"
    }
  ]
}

Send multiple notifications as below:

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 1,
      "message": "Hello World iOS!"
    },
    {
      "tokens": ["token_a", "token_b"],
      "platform": 2,
      "message": "Hello World Android!"
    },
    {
      "tokens": ["token_a", "token_b"],
      "platform": 2,
      "message": "Hello World!"
    },
    .....
  ]
}

See more example about iOS or Android.

Request body

Request body must has a notifications array. The following is a parameter table for each notification.

name	type	description	required	note
tokens	string array	device tokens	o
platform	int	platform(iOS,Android)	o	1=iOS, 2=Android
message	string	message for notification	-
title	string	notification title	-
priority	string	Sets the priority of the message.	-	normal or high
content_available	bool	data messages wake the app by default.	-
sound	string	sound type	-
data	string array	extensible partition	-
retry	int	retry send notification if fail response from server. Value must be small than max_retry field.	-
topic	string	send messages to topics
api_key	string	Android api key	-	only Android
to	string	The value must be a registration token, notification key, or topic.	-	only Android
collapse_key	string	a key for collapsing notifications	-	only Android
delay_while_idle	bool	a flag for device idling	-	only Android
time_to_live	uint	expiration of message kept on FCM storage	-	only Android
restricted_package_name	string	the package name of the application	-	only Android
dry_run	bool	allows developers to test a request without actually sending a message	-	only Android
notification	string array	payload of a FCM message	-	only Android. See the detail
expiration	int	expiration for notification	-	only iOS
apns_id	string	A canonical UUID that identifies the notification	-	only iOS
badge	int	badge count	-	only iOS
category	string	the UIMutableUserNotificationCategory object	-	only iOS
alert	string array	payload of a iOS message	-	only iOS. See the detail
mutable_content	bool	enable Notification Service app extension.	-	only iOS(10.0+).

iOS alert payload

name	type	description	required	note
title	string	Apple Watch & Safari display this string as part of the notification interface.	-
body	string	The text of the alert message.	-
subtitle	string	Apple Watch & Safari display this string as part of the notification interface.	-
action	string	The label of the action button. This one is required for Safari Push Notifications.	-
action-loc-key	string	If a string is specified, the system displays an alert that includes the Close and View buttons.	-
launch-image	string	The filename of an image file in the app bundle, with or without the filename extension.	-
loc-args	array of strings	Variable string values to appear in place of the format specifiers in loc-key.	-
loc-key	string	A key to an alert-message string in a Localizable.strings file for the current localization.	-
title-loc-args	array of strings	Variable string values to appear in place of the format specifiers in title-loc-key.	-
title-loc-key	string	The key to a title string in the Localizable.strings file for the current localization.	-

See more detail about APNs Remote Notification Payload.

Android notification payload

name	type	description	required	note
icon	string	Indicates notification icon.	-
tag	string	Indicates whether each notification message results in a new entry on the notification center on Android.	-
color	string	Indicates color of the icon, expressed in #rrggbb format	-
click_action	string	The action associated with a user click on the notification.	-
body_loc_key	string	Indicates the key to the body string for localization.	-
body_loc_args	string	Indicates the string value to replace format specifiers in body string for localization.	-
title_loc_key	string	Indicates the key to the title string for localization.	-
title_loc_args	string	Indicates the string value to replace format specifiers in title string for localization.	-

See more detail about Firebase Cloud Messaging HTTP Protocol reference.

iOS Example

Send normal notification.

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 1,
      "message": "Hello World iOS!"
    }
  ]
}

The following payload asks the system to display an alert with a Close button and a single action button.The title and body keys provide the contents of the alert. The “PLAY” string is used to retrieve a localized string from the appropriate Localizable.strings file of the app. The resulting string is used by the alert as the title of an action button. This payload also asks the system to badge the app’s icon with the number 5.

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 1,
      "badge": 5,
      "alert": {
        "title" : "Game Request",
        "body" : "Bob wants to play poker",
        "action-loc-key" : "PLAY"
      }
    }
  ]
}

The following payload specifies that the device should display an alert message, plays a sound, and badges the app’s icon.

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 1,
      "message": "You got your emails.",
      "badge": 9,
      "sound": "bingbong.aiff"
    }
  ]
}

Add other fields which user defined via data field.

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 1,
      "message": "Hello World iOS!",
      "data": {
        "key1": "welcome",
        "key2": 2
      }
    }
  ]
}

Android Example

Send normal notification.

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 2,
      "message": "Hello World Android!",
      "title": "You got message"
    }
  ]
}

Add notification payload.

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 2,
      "message": "Hello World Android!",
      "title": "You got message",
      "notification" : {
        "icon": "myicon",
        "color": "#112244"
      }
    }
  ]
}

Add other fields which user defined via data field.

{
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 2,
      "message": "Hello World Android!",
      "title": "You got message",
      "data": {
       "Nick" : "Mario",
       "body" : "great match!",
       "Room" : "PortugalVSDenmark"
      }
    }
  ]
}

Send messages to topics

{
  "notifications": [
    {
      "to": "/topics/foo-bar",
      "platform": 2,
      "message": "This is a Firebase Cloud Messaging Topic Message"
    }
  ]
}

Response body

Error response message table:

status code	message
400	Missing notifications field.
400	Notifications field is empty.
400	Number of notifications(50) over limit(10)

Success response:

{
  "counts": 60,
  "logs": [],
  "success": "ok"
}

If you need error logs from sending fail notifications, please set sync as true on yaml config.

core:
  port: "8088" # ignore this port number if auto_tls is enabled (listen 443).
  worker_num: 0 # default worker number is runtime.NumCPU()
  queue_num: 0 # default queue number is 8192
  max_notification: 100
- sync: false 
+ sync: true

See the following error format.

{
  "counts": 60,
  "logs": [
    {
      "type": "failed-push",
      "platform": "android",
      "token": "*******",
      "message": "Hello World Android!",
      "error": "InvalidRegistration"
    },
    {
      "type": "failed-push",
      "platform": "ios",
      "token": "*****",
      "message": "Hello World iOS1111!",
      "error": "Post https://api.push.apple.com/3/device/bbbbb: remote error: tls: revoked certificate"
    },
    {
      "type": "failed-push",
      "platform": "ios",
      "token": "*******",
      "message": "Hello World iOS222!",
      "error": "Post https://api.push.apple.com/3/device/token_b: remote error: tls: revoked certificate"
    }
  ],
  "success": "ok"
}

Run gRPC service

Gorush support gRPC service. You can enable the gRPC in config.yml, default as disabled. The following example code for Golang to send single notification.

package main

import (
	"log"

	pb "github.com/appleboy/gorush/rpc/proto"
	"golang.org/x/net/context"
	"google.golang.org/grpc"
)

const (
	address = "localhost:9000"
)

func main() {
	// Set up a connection to the server.
	conn, err := grpc.Dial(address, grpc.WithInsecure())
	if err != nil {
		log.Fatalf("did not connect: %v", err)
	}
	defer conn.Close()
	c := pb.NewGorushClient(conn)

	r, err := c.Send(context.Background(), &pb.NotificationRequest{
		Platform: 2,
		Tokens:   []string{"1234567890"},
		Message:  "test message",
	})
	if err != nil {
		log.Fatalf("could not greet: %v", err)
	}
	log.Printf("Success: %t\n", r.Success)
	log.Printf("Count: %d\n", r.Counts)
}

See the Node.js example and see more detail frome README:

var messages = require('./gorush_pb');
var services = require('./gorush_grpc_pb');

var grpc = require('grpc');

function main() {
  var client = new services.GorushClient('localhost:9000',
    grpc.credentials.createInsecure());
  var request = new messages.NotificationRequest();
  request.setPlatform(2);
  request.setTokensList(["1234567890"]);
  request.setMessage("Hello!!");
  client.send(request, function (err, response) {
    console.log('Success:', response.getSuccess());
    console.log('Counts:', response.getCounts());
  });
}

main();

Run gorush in Docker

Set up gorush in the cloud in under 5 minutes with zero knowledge of Golang or Linux shell using our gorush Docker image.

$ docker pull appleboy/gorush
$ docker run --name gorush -p 80:8088 appleboy/gorush

Run gorush with your own config file.

$ docker pull appleboy/gorush
$ docker run --name gorush -v ${PWD}/config.yml:/config.yml -p 80:8088 appleboy/gorush

Testing your gorush server using httpie command.

$ http -v --verify=no --json GET http://your.docker.host/api/stat/go

Run gorush in Kubernetes

Quick Start

Create name space as gorush and configuration map:

$ kubectl create -f k8s/gorush-namespace.yaml
$ kubectl create -f k8s/gorush-configmap.yaml

Create redis service:

$ kubectl create -f k8s/gorush-redis-deployment.yaml
$ kubectl create -f k8s/gorush-redis-service.yaml

Create gorush deployment controller provides declarative updates for Pods and ReplicaSets:

$ kubectl create -f k8s/gorush-deployment.yaml

Create the Service Controller for AWS ELB

$ kubectl create -f k8s/gorush-service.yaml

Ingress Controller for AWS ALB

Update the following in k8s/gorush-service.yaml

-  type: LoadBalancer
-  # type: NodePort
+  # type: LoadBalancer
+  type: NodePort

Then start the AWS ALB by the follwong command.

$ kubectl create -f k8s/gorush-service.yaml
$ kubectl create -f k8s/gorush-aws-alb-ingress.yaml

Clean up the gorush:

$ kubectl delete -f k8s

License

Copyright 2017 Bo-Yi Wu @appleboy.

Licensed under the MIT License.