Messaging API - Send Image with Viber

This page walks you step-by-step through how to use the Messaging API to send a Viber message to an end-user that includes an embedded image. The image file is hosted by you.

Before You Begin

Make sure you have the following before you start:

  • Transaction Callback Service: You need to have this set up so TeleSign can send you delivery status updates for the message you send through the Messaging API. See Transaction Callback Service for setup instructions.
  • Viber Account Details: To send a message using Viber, you first need to provide the details specified on the Set Up Viber for Your Account page to our Customer Support Team.

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NOTE:

The Transaction Callback Service is also where you would receive inbound replies from the recipient of your OmniChannel message.

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CAUTION:

If an end user does not have Viber, the Viber send will fail. We recommend either ensuring your end users have Viber on their devices or including a fallback channel for users without Viber.

Steps

  1. Send a POST /v1/omnichannel request. Include the following param values:
ParameterValueDescriptionRequired?
channelsArray of channel objectsAdd channel objects to the array in the order you want the service to try the channels.yes
channels[0]{"channel":"viber"}Include viber as the first channel.yes
channels[0].fallback_timeA time in milliseconds.Specify the time to wait before cascading to the next channel.no
message.viber.templateimageSpecify the predefined template that includes an embedded image file in the message. To send as part of a session, use image_session instead.yes
message.viber.parameters.urlA fully-qualified URL.The URL where you are hosting your image file.yes
message.sms.templatetextSpecify SMS as your preferred backup channel, using the text template. You can use a different backup channel and template if you prefer.no
message.sms.parameters.textSome text.Text to display in the message.yes (if text template is used for backup)

Request Example

POST /v1/omnichannel HTTP/1.1
Content-Type: application/json
Authorization: Basic 12345678-9ABC-DEF0-1234-56789ABCDEF0:vjE/ZDfPvDkuGNsuqCFFO4neYIs=
Host: rest-ww.telesign.com
{
  "channels": [
    {
      "channel": "viber",
      "fallback_time": 600
    },
    {
      "channel": "sms"
    }
  ],
  "phone_number": "15558675309",
  "message": {
    "viber": {
      "template": "image",
      "parameters": {
        "url":"https://s3.amazonaws.com/viatu-mktg/bogo_coupon_52359.jpg"
      }
    },
    "sms": {
      "template": "text",
      "parameters": {
        "text": "Buy one get one free! Use code 'BOGO' at checkout on viatushop.com."
      }
    }
  },
  "message_type": "MKT"
}
  1. If the request is processed successfully, you should see a response with a 3001 status code.

Response Example

HTTP/1.1 200 OK
Server: nginx/1.17.7
Date: Wed, 14 Oct 2020 21:25:54 GMT
Content-Type: application/json
Content-Length: 137
Connection: keep-alive
Allow: GET,POST,HEAD
{
  "status": {
    "code": 3001,
    "description": "Message in progress"
  },
  "reference_id": "35C8B5D509BC10689196FED2AD551B8A",
  "external_id": null
}
  1. If the send in Viber format is successful, your end-user receives a message on their device that looks like this.
  1. If the send in Viber format fails, the service tries to send the next specified backup channel (if any).
SMS BackupSMS Backup

SMS Backup

  1. Updates on the status of this message are sent to the callback URL for your Transaction Callback Service. The general callback schema common to both this and other products is described on Transaction Callback Service. Modifications to the callback schema for this product are described on Callback Service. Search for these callbacks based on the reference ID in the response to your original Messaging API request. Each callback payload includes an object with the status of the send for each channel that is tried.

Callback Example

GET /callback_endpoint HTTP/1.1
Host: your-callback-url.com
{
  "reference_id": "35C8B5D509BC10689196FED2AD551B8A",
  "external_id": "null",
  "status": {
    "code": 3000,
    "description": "Delivered",
    "last_channel": "sms",
    "updated_on": "2020-05-04 22:07:01:226"
  },
  "channel_status": [
    {"viber": {
      "code": 3056,
      "description": "Message failed to deliver in specified fallback time",
      "reference_id": "65C77D4A6C5C09085694EFB6C554D2BF",
      "updated_on": "2020-05-04 22:05:00.325"
    }},
    {"sms": {
      "code": 3000,
      "description": "Delivered",
      "reference_id": "65C77D4A6C5C09085694EFB6C558B4C7",
      "updated_on": "2020-05-04 22:07:01:226"
    }}
  ]
}

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NOTE:

In addition to the reference ID for the Messaging API transaction itself, the delivery status payload also includes a reference ID for the message-send on each channel. These can be useful for troubleshooting purposes.


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