Multiple Filters to Lock Safari Swift Content

Question

I am creating a simple content block application. It works, but I want to apply filters (which networks to block and which not) with UISwitches(stored in NSUserDefaults). Since the content lock extension uses json, it is not clear to me how I can select multiple json files to work at the same time.

Any ideas how this can be achieved? Multiple Extensions? Combining and splitting json files in some way?

Answer 1

I was in the same situation. The answer to this is a bit complicated, so bear with me. You can not write to a file in the kit ie blockerList.jsonnot written. Here is what you need to do

• Enable application groups from TARGETS→ YOUR MAIN APP→ Capabilities→ App Groups. And add a unique identifier for application groups. Do the same with the extension. (Use the same identifier as the group name that you entered for the main application)
• Create a file in the container directory.
• Write the rules (json) to this file.
• Restart the extension once you have written the rules.
• Reading rules from the Container directory in the content block extension.

From the main application, create a file and write json rules in this file as:

let jsonData = try! JSONSerialization.data(withJSONObject: webFilters, options: JSONSerialization.WritingOptions.prettyPrinted)

//Convert back to string. Usually only do this for debugging

if let JSONString = String(data: jsonData, encoding: String.Encoding.utf8) {

                        let file = "conbo.json"


                        if let dir = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "YOUR_GROUP_IDENTIFIER") {

                            let path     = dir.appendingPathComponent(file)

                            do {

                                try JSONString.write(to: path, atomically: false, encoding: String.Encoding.utf8)

                                let id = "YOUR_CONTENT_BLOCKER_BUNDLE_IDENTIFIER"
                                SFContentBlockerManager.reloadContentBlocker(withIdentifier: id) {error in



                                    guard error == nil else {
                                        print(error ?? "Error")
                                        return
                                    }

                                    print("Reloaded")
                                }

                            }
                            catch {
                            }
                        }


                    }

Now in the extension read the file from the container as:

class ContentBlockerRequestHandler: NSObject, NSExtensionRequestHandling {

func beginRequest(with context: NSExtensionContext) {

    let file = "conbo.json"


    if let dir = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "YOUR_APP_GROUP_IDENTIFIER") {

        let path     = dir.appendingPathComponent(file)

        do {



            do {
                let attachment =  NSItemProvider(contentsOf: path)!

                let item = NSExtensionItem()
                item.attachments = [attachment]

                context.completeRequest(returningItems: [item], completionHandler: nil)


            } 



        }

    }



}



}