gorush/README.md

# gorush

A push notification micro server using [Gin](https://github.com/gin-gonic/gin) framework written in Go (Golang).

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## Contents

- [Support Platform](#support-platform)
- [Features](#features)
- [Basic Usage](#basic-usage)
  - [Download a binary](#download-a-binary)
  - [Command Usage](#command-usage)
  - [Send Android notification](#send-android-notification)
  - [Send iOS notification](#send-ios-notification)
- [Run gorush web server](#run-gorush-web-server)
- [Web API](#web-api)
  - [GET /api/stat/go](#get-apistatgo)
  - [GET /api/stat/app](#get-apistatapp)
  - [GET /sys/stats](#get-sysstats)
  - [POST /api/push](#post-apipush)
  - [Request body](#request-body)
  - [iOS alert payload](#ios-alert-payload)
  - [Android notification payload](#android-notification-payload)
  - [iOS Example](#ios-example)
  - [Android Example](#Android-Example)
  - [Response body](#Response-body)
- [Run gorush in Docker](#run-gorush-in-docker)
- [License](#license)

## Support Platform

* [APNS](https://developer.apple.com/library/ios/documentation/networkinginternet/conceptual/remotenotificationspg/Chapters/ApplePushService.html)
* [GCM](https://developer.android.com/google/gcm/index.html)

## Features

* Support [Google Cloud Message](https://developers.google.com/cloud-messaging/) using [go-gcm](https://github.com/google/go-gcm) library for Android.
* Support [HTTP/2](https://http2.github.io/) Apple Push Notification Service using [apns2](https://github.com/sideshow/apns2) library.
* Support [YAML](https://github.com/go-yaml/yaml) configuration.
* Support command line to send single Android or iOS notification.
* Support Web API to send push notification.
* Support zero downtime restarts for go servers using [endless](https://github.com/fvbock/endless).
* Support [HTTP/2](https://http2.github.io/) 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](https://en.wikipedia.org/wiki/YAML) config.
* Support store app stat to memory, [Redis](http://redis.io/), [BoltDB](https://github.com/boltdb/bolt), [BuntDB](https://github.com/tidwall/buntdb) or [LevelDB](https://github.com/syndtr/goleveldb).
* 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 (GCM).
* Support retry send notification if server response is fail.

See the [YAML config example](config/config.yml):

```yaml
core:
  port: "8088"
  worker_num: 8
  queue_num: 8192
  max_notification: 100
  mode: "release"
  ssl: false
  cert_path: "cert.pem"
  key_path: "key.pem"
  http_proxy: "" # only working for GCM server
  pid:
    enabled: true
    path: "gorush.pid"
    override: true

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"

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

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"
```

## 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](https://github.com/appleboy/gorush/releases).

With `Go` installed

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

On linux

```
$ wget https://github.com/appleboy/gorush/releases/download/v1.6.5/gorush-v1.6.5-linux-amd64 -O gorush
```

On OS X

```
$ wget https://github.com/appleboy/gorush/releases/download/v1.6.5/gorush-v1.6.5-darwin-amd64 -O gorush
```

### Command Usage

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

Usage: gorush [options]

Server Options:
    -p, --port <port>                Use port for clients (default: 8088)
    -c, --config <file>              Configuration file
    -m, --message <message>          Notification message
    -t, --token <token>              Notification token
    --proxy <proxy>                  Proxy URL (only for GCM)
iOS Options:
    -i, --key <file>                 certificate key file path
    -P, --password <password>        certificate key password
    --topic <topic>                  iOS topic
    --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:
    -h, --help                       Show this message
    -v, --version                    Show version
```

### Send Android notification

Send single notification with the following command.

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

* `-m`: Notification message.
* `-k`: [Google cloud message](https://developers.google.com/cloud-messaging/) api key
* `-t`: Device token.
* `--proxy`: Set http proxy url. (only working for GCM)

### Send iOS notification

Send single notification with the following command.

```bash
$ 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.
* `-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.

```bash
$ gorush -ios -m="your message" -i="your certificate path" -t="device token" -production
```

## Run gorush web server

Please make sure your [config.yml](config/config.yml) exist. Default port is `8088`.

```bash
$ gorush -c config.yml
```

Get go status of api server using [httpie](https://github.com/jkbrzt/httpie) tool:

```bash
$ http -v --verify=no --json GET https://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](https://github.com/fukata/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.

```json
{
  "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.

```json
{
  "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.

```json
{
  "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
}
```

### POST /api/push

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

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

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

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

Send multiple notifications as below:

```json
{
  "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](#ios-example) or [Android](#android-example).

### 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                                                                          | o        |                                                               |
| 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. | -        |                                                               |
| 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 GCM 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 GCM message                                                                          | -        | only Android. See the [detail](#android-notification-payload) |
| expiration              | int          | expiration for notification                                                                       | -        | only iOS                                                      |
| apns_id                 | string       | A canonical UUID that identifies the notification                                                 | -        | only iOS                                                      |
| topic                   | string       | topic of the remote 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](#ios-alert-payload)                |

### iOS alert payload

| name           | type             | description                                                                                      | required | note |
|----------------|------------------|--------------------------------------------------------------------------------------------------|----------|------|
| 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](https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/TheNotificationPayload.html#//apple_ref/doc/uid/TP40008194-CH107-SW1).

### 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 [GCM server reference](https://developers.google.com/cloud-messaging/http-server-ref#send-downstream).

### iOS Example

Send normal notification.

```json
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 1,
      "message": "Hello World iOS!",
      "title": "You got message"
    }
  ]
```

The app icon be badged with the number `9` and that a bundled alert sound be played when the notification is delivered.

```json
  "notifications": [
    {
      "tokens": ["token_a", "token_b"],
      "platform": 1,
      "message": "Hello World iOS!",
      "title": "You got message",
      "badge": 9,
      "sound": "bingbong.aiff"
    }
  ]
```

Add other fields which user defined via `data` field.

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

### Android Example

Send normal notification.

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

Add `notification` payload.

```json
  "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.

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

### 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:

```json
{
  "success": "ok"
}
```

## 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](https://hub.docker.com/r/appleboy/gorush/).

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

Run `gorush` with your own config file.

```bash
$ 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](https://github.com/jkbrzt/httpie) command.

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

![statue screenshot](screenshot/status.png)

## License

Copyright 2016 Bo-Yi Wu [@appleboy](https://twitter.com/appleboy).

Licensed under the MIT License.