Image push notification is not working IOS - ios

Question

UNNotificationServiceExtension is not getting called when i am trying to call the following custom payload data.
{
"aps": {
"alert": {
"title": "Hello",
"body": "body.."
},
"mutable-content":1,
"sound": "default",
"badge": 1,
},
"data": {
"attachment-url": "https://pusher.com/static_logos/320x320.png"
},
}
But when i call this below custom payload data,then UNNotificationServiceExtension is getting called
{
"aps": {
"alert": {
"title": "Hello",
"body": "body.."
},
"mutable-content":1,
"sound": "default",
"badge": 1,
},
"data": {
"attachment-url": ""
},
}
My problem is that if i put any http url in attachment-url key then UNNotificationServiceExtension it's not getting called but if i put sometext or leave it as empty instead of Url then it's will call.
I am sending custom payload from https://pushtry.com/
Here is my NotificationServiceExtension class
import UserNotifications
class NotificationService: UNNotificationServiceExtension {
var contentHandler: ((UNNotificationContent) -> Void)?
var bestAttemptContent: UNMutableNotificationContent?
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: #escaping (UNNotificationContent) -> Void) {
self.contentHandler = contentHandler
bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
// Get the custom data from the notification payload
if let notificationData = request.content.userInfo["data"] as? [String: String] {
// Grab the attachment
if let urlString = notificationData["attachment-url"], let fileUrl = URL(string: urlString) {
// Download the attachment
URLSession.shared.downloadTask(with: fileUrl) { (location, response, error) in
if let location = location {
// Move temporary file to remove .tmp extension
let tmpDirectory = NSTemporaryDirectory()
let tmpFile = "file://".appending(tmpDirectory).appending(fileUrl.lastPathComponent)
let tmpUrl = URL(string: tmpFile)!
try! FileManager.default.moveItem(at: location, to: tmpUrl)
// Add the attachment to the notification content
if let attachment = try? UNNotificationAttachment(identifier: "", url: tmpUrl) {
self.bestAttemptContent?.attachments = [attachment]
}
}
// Serve the notification content
self.contentHandler!(self.bestAttemptContent!)
}.resume()
}
} }
override func serviceExtensionTimeWillExpire() {
// Called just before the extension will be terminated by the system.
// Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
if let contentHandler = contentHandler, let bestAttemptContent = bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
}
extension UNNotificationAttachment {
/// Save the image to disk
static func create(imageFileIdentifier: String, data: NSData, options: [NSObject : AnyObject]?) -> UNNotificationAttachment? {
let fileManager = FileManager.default
let tmpSubFolderName = ProcessInfo.processInfo.globallyUniqueString
let tmpSubFolderURL = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(tmpSubFolderName, isDirectory: true)
do {
try fileManager.createDirectory(at: tmpSubFolderURL!, withIntermediateDirectories: true, attributes: nil)
let fileURL = tmpSubFolderURL?.appendingPathComponent(imageFileIdentifier)
try data.write(to: fileURL!, options: [])
let imageAttachment = try UNNotificationAttachment(identifier: imageFileIdentifier, url: fileURL!, options: options)
return imageAttachment
} catch let error {
print("error \(error)")
}
return nil
}
}