mirror of https://github.com/oxen-io/session-ios
Merge branch 'charlesmchen/onboardingCaptcha'
Matthew Chen
6 years ago
commit
4d72e0d5d4
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//
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// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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//
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import UIKit
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import WebKit
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@objc
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public class OnboardingCaptchaViewController: OnboardingBaseViewController {
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private var webView: WKWebView?
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override public func loadView() {
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super.loadView()
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view.backgroundColor = Theme.backgroundColor
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view.layoutMargins = .zero
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// TODO:
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// navigationItem.title = NSLocalizedString("SETTINGS_BACKUP", comment: "Label for the backup view in app settings.")
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let titleLabel = self.titleLabel(text: NSLocalizedString("ONBOARDING_CAPTCHA_TITLE", comment: "Title of the 'onboarding Captcha' view."))
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let titleRow = UIStackView(arrangedSubviews: [
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titleLabel
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])
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titleRow.axis = .vertical
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titleRow.alignment = .fill
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titleRow.layoutMargins = UIEdgeInsets(top: 16, left: 16, bottom: 0, right: 16)
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titleRow.isLayoutMarginsRelativeArrangement = true
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// We want the CAPTCHA web content to "fill the screen (honoring margins)".
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// The way to do this with WKWebView is to inject a javascript snippet that
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// manipulates the viewport.
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let jscript = "var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta);"
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let userScript = WKUserScript(source: jscript, injectionTime: .atDocumentEnd, forMainFrameOnly: true)
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let wkUController = WKUserContentController()
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wkUController.addUserScript(userScript)
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let wkWebConfig = WKWebViewConfiguration()
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wkWebConfig.userContentController = wkUController
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let webView = WKWebView(frame: self.view.bounds, configuration: wkWebConfig)
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self.webView = webView
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webView.navigationDelegate = self
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webView.allowsBackForwardNavigationGestures = false
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webView.customUserAgent = "Signal iOS (+https://signal.org/download)"
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webView.allowsLinkPreview = false
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webView.scrollView.contentInset = .zero
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webView.layoutMargins = .zero
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let stackView = UIStackView(arrangedSubviews: [
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titleRow,
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webView
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])
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stackView.axis = .vertical
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stackView.alignment = .fill
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stackView.layoutMargins = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
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stackView.isLayoutMarginsRelativeArrangement = true
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view.addSubview(stackView)
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stackView.autoPinWidthToSuperviewMargins()
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stackView.autoPin(toTopLayoutGuideOf: self, withInset: 0)
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autoPinView(toBottomOfViewControllerOrKeyboard: stackView, avoidNotch: true)
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NotificationCenter.default.addObserver(self,
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selector: #selector(didBecomeActive),
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name: NSNotification.Name.OWSApplicationDidBecomeActive,
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object: nil)
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}
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deinit {
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NotificationCenter.default.removeObserver(self)
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}
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public override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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self.navigationController?.isNavigationBarHidden = false
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loadContent()
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}
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fileprivate let contentUrl = "https://signalcaptchas.org/registration/generate.html"
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private func loadContent() {
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guard let webView = webView else {
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owsFailDebug("Missing webView.")
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return
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}
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guard let url = URL(string: contentUrl) else {
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owsFailDebug("Invalid URL.")
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return
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}
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webView.load(URLRequest(url: url))
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webView.scrollView.contentOffset = .zero
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}
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public override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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self.navigationController?.isNavigationBarHidden = false
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}
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// MARK: - Notifications
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@objc func didBecomeActive() {
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AssertIsOnMainThread()
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loadContent()
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}
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// MARK: -
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private func parseCaptchaAndTryToRegister(url: URL) {
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Logger.info("")
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guard let captchaToken = parseCaptcha(url: url) else {
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owsFailDebug("Could not parse captcha token: \(url)")
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// TODO: Alert?
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//
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// Reload content so user can try again.
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loadContent()
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return
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}
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onboardingController.update(captchaToken: captchaToken)
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onboardingController.tryToRegister(fromViewController: self, smsVerification: false)
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}
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private func parseCaptcha(url: URL) -> String? {
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Logger.info("")
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// Example URL:
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// signalcaptcha://03AF6jDqXgf1PocNNrWRJEENZ9l6RAMIsUoESi2dFKkxTgE2qjdZGVjEW6SZNFQqeRRTgGqOii6zHGG--uLyC1HnhSmRt8wHeKxHcg1hsK4ucTusANIeFXVB8wPPiV7U_0w2jUFVak5clMCvW9_JBfbfzj51_e9sou8DYfwc_R6THuTBTdpSV8Nh0yJalgget-nSukCxh6FPA6hRVbw7lP3r-me1QCykHOfh-V29UVaQ4Fs5upHvwB5rtiViqT_HN8WuGmdIdGcaWxaqy1lQTgFSs2Shdj593wZiXfhJnCWAw9rMn3jSgIZhkFxdXwKOmslQ2E_I8iWkm6
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guard let host = url.host,
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host.count > 0 else {
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owsFailDebug("Missing host.")
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return nil
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}
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return host
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}
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}
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// MARK: -
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extension OnboardingCaptchaViewController: WKNavigationDelegate {
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public func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
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Logger.verbose("navigationAction: \(String(describing: navigationAction.request.url))")
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guard let url: URL = navigationAction.request.url else {
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owsFailDebug("Missing URL.")
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decisionHandler(.cancel)
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return
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}
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if url.scheme == "signalcaptcha" {
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decisionHandler(.cancel)
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DispatchQueue.main.async {
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self.parseCaptchaAndTryToRegister(url: url)
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}
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return
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}
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// Loading the Captcha content involves a series of actions.
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decisionHandler(.allow)
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}
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public func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void) {
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Logger.verbose("navigationResponse: \(String(describing: navigationResponse))")
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decisionHandler(.allow)
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}
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public func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
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Logger.verbose("navigation: \(String(describing: navigation))")
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}
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public func webView(_ webView: WKWebView, didReceiveServerRedirectForProvisionalNavigation navigation: WKNavigation!) {
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Logger.verbose("navigation: \(String(describing: navigation))")
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}
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public func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
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Logger.verbose("navigation: \(String(describing: navigation)), error: \(error)")
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}
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public func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
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Logger.verbose("navigation: \(String(describing: navigation))")
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}
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public func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
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Logger.verbose("navigation: \(String(describing: navigation))")
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}
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public func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
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Logger.verbose("navigation: \(String(describing: navigation)), error: \(error)")
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}
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public func webViewWebContentProcessDidTerminate(_ webView: WKWebView) {
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Logger.verbose("")
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}
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}
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