Filtering Unwanted Messages with Identity Lookup

機能

• 迷惑の内容をフィルタリング
• フィッシング詐欺をフィルタリング
• キャリア経由（SMS,MMSのみ）
• 専門的の知識を適応可能（AIなど）

Message Filter extensions

Message Filter extensions(Offline)

• New app extension point
• Part of Identity Lookup framework, new in iOS 11
• Must be enabled by user in Messages settings
• One extension enabled at a time
• Invoked for each SMS from an unknown sender

Message Filter extensions(Offline)の注意事項

• 受信者の電話番号をextensionに渡さないこと、送信者情報のみを渡す
• extensionの制限
  • 連絡先アプリのシェアファイルに書き込みしないこと
  • 通信しないこと
• Do not export messages outside extension’s container

メッセージの基準(Requirements for messages to be sent to extension)

• SMS and MMS only
• Never iMessage
• Only unknown senders (not in recipient’s Contacts)
• After multiple responses
  • Stops sending to extension
  • Junk threads promoted to non-junk

Message Filter extensions(Offline)の実装例

Network Deferral

Message Filter extensions(With network deferral)

Network Deferralの制限

• ユーザーを特定するデータを送信しないこと
• extension’s Info.plistにURLを指定する必要
• HTTPS required, no App Transport Security (ATS) overrides
• Extension’s app must use Associated Domains (apple-app-site-association)

Network Request and Response Formats

• Network request uses JSON and includes
• Message sender (phone number or email) Message body
• Version of app (CFBundleVersion)
• Version of the JSON request format (currently 1)
• Response format is up to your app to define

// Example of Network HTTP Request Sent to Server

POST /server-url-path HTTP/1.1
Accept: */*
Content-Type: application/json; charset=utf-8 Content-Length: 148

{ "_version": 1, "query": {
"sender": "14085550001", "message": {
"text": "This is a message" }
}, "app": {
"version": "1.1" }
}

Network Deferralの実装例

参考資料