I want to filter users browsing activity based on response content.
I started by implementing a simple NEFIlterDataProvider extension based on docs and official iOS-samples
After that, I tried everything I could find here and in SO threads, but I can't make breakpoints or output work.
https://forums.developer.apple.com/thread/11241
https://forums.developer.apple.com/thread/9775
I have tried all the debugging methods mentioned in the topics above, but I don't see any triggered breakpoints or any output in the device console
Here is the simplest extension code, but I can’t debug it anyway
import NetworkExtension
import os.log
class FilterDataProvider: NEFilterDataProvider {
override func startFilter(completionHandler: @escaping (Error?) -> Void) {
// Add code to initialize the filter.
os_log("---------------------FOR LOGGING----------------------")
completionHandler(nil)
}
override func stopFilter(with reason: NEProviderStopReason, completionHandler: @escaping () -> Void) {
// Add code to clean up filter resources.
os_log("---------------------FOR LOGGING----------------------")
completionHandler()
}
override func handleNewFlow(_ flow: NEFilterFlow) -> NEFilterNewFlowVerdict {
print("new flow: \(flow)")
os_log("---------------------FOR LOGGING----------------------")
// Add code to determine if the flow should be dropped or not, downloading new rules if required.
return .drop()
}
}Even with .drop() response handling I still can browse freely so looks like it doesn’t work for me.
Here are my entitlements and a part of info.plist.
<dict>
<key>com.apple.developer.networking.networkextension</key>
<array>
<string>app-proxy-provider</string>
<string>content-filter-provider</string>
<string>packet-tunnel-provider</string>
</array>
<key>com.apple.security.application-groups</key>
<array>
<string>group.ArunBuduri.urlFetcher</string>
</array>
</dict>
</plist>
Info.plist
<key>NSExtension</key>
<dict>
<key>NSExtensionPointIdentifier</key>
<string>com.apple.networkextension.filter-data</string>
<key>NSExtensionPrincipalClass</key>
<string>FilterDataProvider</string>
</dict>
When I try to connect XCode to a running extension, I always have "waiting to attach to "extension name' on device" message.
I have a supervised device but I didn't do any additional profile customization or something like that.
I'm working with 10.2.1 XCode, but I tried to debug it on different versions including 8x.
My host app is just a VC with a link to a site to test the extension. I tried to connect extension to my host application and browsers, filter extension is added to the Embed Binaries, and I have no idea what I'm doing wrong. Maybe I need to extend my host application functionality or do some work with my device's profile to enable content filter?
I will be glad to any comment or advice, thanks.
