added createWebArchiveData iOS-specific WebView method, Moved saveWebArchive WebView method from Android-specific to cross-platform

CHANGELOG.md

@@ -10,7 +10,7 @@
 - Added `addUserScript`, `addUserScripts`, `removeUserScript`, `removeUserScripts`, `removeAllUserScripts`, `callAsyncJavaScript` WebView methods
 - Added `contentWorld` argument to `evaluateJavascript` WebView method
 - Added `isDirectionalLockEnabled`, `mediaType`, `pageZoom`, `limitsNavigationsToAppBoundDomains` iOS-specific WebView options
-- Added `handlesURLScheme`, `createPdf` iOS-specific WebView methods
+- Added `handlesURLScheme`, `createPdf`, `createWebArchiveData` iOS-specific WebView methods
 - Added `iosAnimated` optional argument to `zoomBy` WebView method
 - Added `screenshotConfiguration` optional argument to `takeScreenshot` WebView method
 - Updated integration tests
@@ -44,6 +44,7 @@
 - `allowUniversalAccessFromFileURLs` and `allowFileAccessFromFileURLs` WebView options moved from Android-specific options to cross-platform options
 - Added `callAsyncJavaScript` name to the list of javaScriptHandlerForbiddenNames
 - Changed `zoomBy` WebView method signature
+- Moved `saveWebArchive` WebView method from Android-specific to cross-platform
 
 ## 4.0.0+4
 

README.md

@@ -494,6 +494,7 @@ Android-specific methods can be called using the `InAppWebViewController.android
 iOS-specific methods can be called using the `InAppWebViewController.ios` attribute. Static methods can be called using the `IOSInAppWebViewController` class directly.
 
 * `createPdf({IOSWKPDFConfiguration? iosWKPdfConfiguration})`: Generates PDF data from the web view’s contents asynchronously.
+* `createWebArchiveData`: Creates a web archive of the web view’s current contents asynchronously.
 * `hasOnlySecureContent`: A Boolean value indicating whether all resources on the page have been loaded over securely encrypted connections.
 * `reloadFromOrigin`: Reloads the current page, performing end-to-end revalidation using cache-validating conditionals if possible.
 * `static handlesURLScheme(String urlScheme)`: Returns a Boolean value that indicates whether WebKit natively supports resources with the specified URL scheme.

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppWebViewMethodHandler.java

@@ -338,9 +338,9 @@ public class InAppWebViewMethodHandler implements MethodChannel.MethodCallHandle
         break;
       case "saveWebArchive":
         if (webView != null) {
-          String basename = (String) call.argument("basename");
+          String filePath = (String) call.argument("filePath");
           boolean autoname = (boolean) call.argument("autoname");
-          webView.saveWebArchive(basename, autoname, new ValueCallback<String>() {
+          webView.saveWebArchive(filePath, autoname, new ValueCallback<String>() {
             @Override
             public void onReceiveValue(String value) {
               result.success(value);

example/.flutter-plugins-dependencies

@@ -1 +1 @@
-{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"android":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"macos":[{"name":"path_provider_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_macos-0.0.4+8/","dependencies":[]},{"name":"url_launcher_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_macos-0.1.0-nullsafety.2/","dependencies":[]}],"linux":[{"name":"path_provider_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_linux-0.0.1+2/","dependencies":[]},{"name":"url_launcher_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_linux-0.1.0-nullsafety.3/","dependencies":[]}],"windows":[{"name":"path_provider_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_windows-0.0.4+3/","dependencies":[]},{"name":"url_launcher_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_windows-0.1.0-nullsafety.2/","dependencies":[]}],"web":[]},"dependencyGraph":[{"name":"device_info","dependencies":[]},{"name":"flutter_downloader","dependencies":[]},{"name":"flutter_inappwebview","dependencies":["device_info"]},{"name":"integration_test","dependencies":[]},{"name":"path_provider","dependencies":["path_provider_macos","path_provider_linux","path_provider_windows"]},{"name":"path_provider_linux","dependencies":[]},{"name":"path_provider_macos","dependencies":[]},{"name":"path_provider_windows","dependencies":[]},{"name":"permission_handler","dependencies":[]},{"name":"url_launcher","dependencies":["url_launcher_linux","url_launcher_macos","url_launcher_windows"]},{"name":"url_launcher_linux","dependencies":[]},{"name":"url_launcher_macos","dependencies":[]},{"name":"url_launcher_windows","dependencies":[]}],"date_created":"2021-02-08 18:26:05.315620","version":"1.26.0-18.0.pre.90"}
+{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"android":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"macos":[{"name":"path_provider_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_macos-0.0.4+8/","dependencies":[]},{"name":"url_launcher_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_macos-0.1.0-nullsafety.2/","dependencies":[]}],"linux":[{"name":"path_provider_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_linux-0.0.1+2/","dependencies":[]},{"name":"url_launcher_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_linux-0.1.0-nullsafety.3/","dependencies":[]}],"windows":[{"name":"path_provider_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_windows-0.0.4+3/","dependencies":[]},{"name":"url_launcher_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_windows-0.1.0-nullsafety.2/","dependencies":[]}],"web":[]},"dependencyGraph":[{"name":"device_info","dependencies":[]},{"name":"flutter_downloader","dependencies":[]},{"name":"flutter_inappwebview","dependencies":["device_info"]},{"name":"integration_test","dependencies":[]},{"name":"path_provider","dependencies":["path_provider_macos","path_provider_linux","path_provider_windows"]},{"name":"path_provider_linux","dependencies":[]},{"name":"path_provider_macos","dependencies":[]},{"name":"path_provider_windows","dependencies":[]},{"name":"permission_handler","dependencies":[]},{"name":"url_launcher","dependencies":["url_launcher_linux","url_launcher_macos","url_launcher_windows"]},{"name":"url_launcher_linux","dependencies":[]},{"name":"url_launcher_macos","dependencies":[]},{"name":"url_launcher_windows","dependencies":[]}],"date_created":"2021-02-09 01:23:18.308862","version":"1.26.0-18.0.pre.90"}

example/ios/Runner.xcodeproj/project.pbxproj

@@ -262,7 +262,6 @@
 				"${BUILT_PRODUCTS_DIR}/flutter_inappwebview/flutter_inappwebview.framework",
 				"${BUILT_PRODUCTS_DIR}/integration_test/integration_test.framework",
 				"${BUILT_PRODUCTS_DIR}/path_provider/path_provider.framework",
-				"${BUILT_PRODUCTS_DIR}/pdf_viewer_plugin/pdf_viewer_plugin.framework",
 				"${BUILT_PRODUCTS_DIR}/url_launcher/url_launcher.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
@@ -272,7 +271,6 @@
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/flutter_inappwebview.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/integration_test.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/path_provider.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/pdf_viewer_plugin.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/url_launcher.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;

example/ios/Runner/Info.plist

@@ -2,8 +2,10 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>NSDocumentsFolderUsageDescription</key>
+	<string>InAppWebView requires access to documents folder</string>
 	<key>NSMicrophoneUsageDescription</key>
-	<string>InAppWebView requires acess to mic.</string>
+	<string>InAppWebView requires access to mic.</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
 	<key>CFBundleExecutable</key>
@@ -64,7 +66,7 @@
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
 	<key>NSCameraUsageDescription</key>
-	<string>InAppWebView requires acess to cam.</string>
+	<string>InAppWebView requires access to cam.</string>
 	<key>NSLocalNetworkUsageDescription</key>
 	<string>Allow Flutter tools on your computer to connect and debug your application.</string>
 </dict>

example/lib/in_app_webiew_example.screen.dart

@@ -3,6 +3,7 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_inappwebview/flutter_inappwebview.dart';
+// import 'package:path_provider/path_provider.dart';
 import 'package:url_launcher/url_launcher.dart';
 
 import 'main.dart';

example/lib/main.dart

@@ -18,6 +18,7 @@ Future main() async {
   WidgetsFlutterBinding.ensureInitialized();
   // await Permission.camera.request();
   // await Permission.microphone.request();
+  // await Permission.storage.request();
   if (Platform.isAndroid) {
     await AndroidInAppWebViewController.setWebContentsDebuggingEnabled(true);
 

ios/Classes/InAppWebView.swift

@@ -1700,70 +1700,117 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
             : currentIndex + steps >= 0
     }
     
+    @available(iOS 11.0, *)
     public func takeScreenshot (with: [String: Any?]?, completionHandler: @escaping (_ screenshot: Data?) -> Void) {
-        if #available(iOS 11.0, *) {
+        var snapshotConfiguration: WKSnapshotConfiguration? = nil
-            var snapshotConfiguration: WKSnapshotConfiguration? = nil
+        if let with = with {
-            if let with = with {
+            snapshotConfiguration = WKSnapshotConfiguration()
-                snapshotConfiguration = WKSnapshotConfiguration()
+            if let rect = with["rect"] as? [String: Double] {
-                if let rect = with["rect"] as? [String: Double] {
+                snapshotConfiguration!.rect = CGRect(x: rect["x"]!, y: rect["y"]!, width: rect["width"]!, height: rect["height"]!)
-                    snapshotConfiguration!.rect = CGRect(x: rect["x"]!, y: rect["y"]!, width: rect["width"]!, height: rect["height"]!)
-                }
-                if let snapshotWidth = with["snapshotWidth"] as? Double {
-                    snapshotConfiguration!.snapshotWidth = NSNumber(value: snapshotWidth)
-                }
-                if #available(iOS 13.0, *), let afterScreenUpdates = with["iosAfterScreenUpdates"] as? Bool {
-                    snapshotConfiguration!.afterScreenUpdates = afterScreenUpdates
-                }
             }
-            takeSnapshot(with: snapshotConfiguration, completionHandler: {(image, error) -> Void in
+            if let snapshotWidth = with["snapshotWidth"] as? Double {
-                var imageData: Data? = nil
+                snapshotConfiguration!.snapshotWidth = NSNumber(value: snapshotWidth)
-                if let screenshot = image {
+            }
-                    if let with = with {
+            if #available(iOS 13.0, *), let afterScreenUpdates = with["iosAfterScreenUpdates"] as? Bool {
-                        switch with["compressFormat"] as! String {
+                snapshotConfiguration!.afterScreenUpdates = afterScreenUpdates
-                        case "JPEG":
+            }
-                            let quality = Float(with["quality"] as! Int) / 100
+        }
-                            imageData = screenshot.jpegData(compressionQuality: CGFloat(quality))!
+        takeSnapshot(with: snapshotConfiguration, completionHandler: {(image, error) -> Void in
-                            break
+            var imageData: Data? = nil
-                        case "PNG":
+            if let screenshot = image {
-                            imageData = screenshot.pngData()!
+                if let with = with {
-                            break
+                    switch with["compressFormat"] as! String {
-                        default:
+                    case "JPEG":
-                            imageData = screenshot.pngData()!
+                        let quality = Float(with["quality"] as! Int) / 100
-                        }
+                        imageData = screenshot.jpegData(compressionQuality: CGFloat(quality))!
-                    }
+                        break
-                    else {
+                    case "PNG":
+                        imageData = screenshot.pngData()!
+                        break
+                    default:
                         imageData = screenshot.pngData()!
                     }
                 }
-                completionHandler(imageData)
+                else {
-            })
+                    imageData = screenshot.pngData()!
-        } else {
+                }
-            completionHandler(nil)
+            }
+            completionHandler(imageData)
+        })
+    }
+    
+    @available(iOS 14.0, *)
+    public func createPdf (configuration: [String: Any?]?, completionHandler: @escaping (_ pdf: Data?) -> Void) {
+        let pdfConfiguration: WKPDFConfiguration = .init()
+        if let configuration = configuration {
+            if let rect = configuration["rect"] as? [String: Double] {
+                pdfConfiguration.rect = CGRect(x: rect["x"]!, y: rect["y"]!, width: rect["width"]!, height: rect["height"]!)
+            }
+        }
+        createPDF(configuration: pdfConfiguration) { (result) in
+            switch (result) {
+            case .success(let data):
+                completionHandler(data)
+                return
+            case .failure(let error):
+                print(error.localizedDescription)
+                completionHandler(nil)
+                return
+            }
         }
     }
     
-    public func createPdf (configuration: [String: Any?]?, completionHandler: @escaping (_ pdf: Data?) -> Void) {
+    @available(iOS 14.0, *)
-        if #available(iOS 14.0, *) {
+    public func createWebArchiveData (dataCompletionHandler: @escaping (_ webArchiveData: Data?) -> Void) {
-            let pdfConfiguration: WKPDFConfiguration = .init()
+        createWebArchiveData(completionHandler: { (result) in
-            if let configuration = configuration {
+            switch (result) {
-                if let rect = configuration["rect"] as? [String: Double] {
+            case .success(let data):
-                    pdfConfiguration.rect = CGRect(x: rect["x"]!, y: rect["y"]!, width: rect["width"]!, height: rect["height"]!)
+                dataCompletionHandler(data)
-                }
+                return
+            case .failure(let error):
+                print(error.localizedDescription)
+                dataCompletionHandler(nil)
+                return
             }
-            createPDF(configuration: pdfConfiguration) { (result) in
+        })
-                switch (result) {
+    }
-                case .success(let data):
+    
-                    completionHandler(data)
+    @available(iOS 14.0, *)
-                    return
+    public func saveWebArchive (filePath: String, autoname: Bool, completionHandler: @escaping (_ path: String?) -> Void) {
-                case .failure(let error):
+        createWebArchiveData(dataCompletionHandler: { (webArchiveData) in
+            if let webArchiveData = webArchiveData {
+                var localUrl = URL(fileURLWithPath: filePath)
+                if autoname {
+                    if let url = self.url {
+                        // tries to mimic Android saveWebArchive method
+                        let invalidCharacters = CharacterSet(charactersIn: "\\/:*?\"<>|")
+                                    .union(.newlines)
+                                    .union(.illegalCharacters)
+                                    .union(.controlCharacters)
+                                
+                        let currentPageUrlFileName = url.path
+                            .components(separatedBy: invalidCharacters)
+                            .joined(separator: "")
+                        
+                        let fullPath = filePath + "/" + currentPageUrlFileName + ".webarchive"
+                        localUrl = URL(fileURLWithPath: fullPath)
+                    } else {
+                        completionHandler(nil)
+                        return
+                    }
+                }
+                do {
+                    try webArchiveData.write(to: localUrl)
+                    completionHandler(localUrl.path)
+                } catch {
+                    // Catch any errors
                     print(error.localizedDescription)
                     completionHandler(nil)
-                    return
                 }
+            } else {
+                completionHandler(nil)
             }
-        } else {
+        })
-            completionHandler(nil)
-        }
     }
     
     public func loadUrl(url: URL, headers: [String: String]?) {

ios/Classes/InAppWebViewMethodHandler.swift

@@ -128,7 +128,7 @@ class InAppWebViewMethodHandler: FlutterMethodCallDelegate {
                 result(webView?.isLoading ?? false)
                 break
             case "takeScreenshot":
-                if webView != nil {
+                if webView != nil, #available(iOS 11.0, *) {
                     let screenshotConfiguration = arguments!["screenshotConfiguration"] as? [String: Any?]
                     webView!.takeScreenshot(with: screenshotConfiguration, completionHandler: { (screenshot) -> Void in
                         result(screenshot)
@@ -403,7 +403,7 @@ class InAppWebViewMethodHandler: FlutterMethodCallDelegate {
                 }
                 break
             case "createPdf":
-                if webView != nil {
+                if webView != nil, #available(iOS 14.0, *) {
                     let configuration = arguments!["iosWKPdfConfiguration"] as? [String: Any?]
                     webView!.createPdf(configuration: configuration, completionHandler: { (pdf) -> Void in
                         result(pdf)
@@ -413,6 +413,28 @@ class InAppWebViewMethodHandler: FlutterMethodCallDelegate {
                     result(nil)
                 }
                 break
+            case "createWebArchiveData":
+                if webView != nil, #available(iOS 14.0, *) {
+                    webView!.createWebArchiveData(dataCompletionHandler: { (webArchiveData) -> Void in
+                        result(webArchiveData)
+                    })
+                }
+                else {
+                    result(nil)
+                }
+                break
+            case "saveWebArchive":
+                if webView != nil, #available(iOS 14.0, *) {
+                    let filePath = arguments!["filePath"] as! String
+                    let autoname = arguments!["autoname"] as! Bool
+                    webView!.saveWebArchive(filePath: filePath, autoname: autoname, completionHandler: { (path) -> Void in
+                        result(path)
+                    })
+                }
+                else {
+                    result(nil)
+                }
+                break
             default:
                 result(FlutterMethodNotImplemented)
                 break

lib/src/in_app_webview_controller.dart

@@ -1508,7 +1508,7 @@ class InAppWebViewController {
   ///
   ///[screenshotConfiguration] represents the configuration data to use when generating an image from a web view’s contents.
   ///
-  ///**NOTE for iOS**: available from iOS 11.0+.
+  ///**NOTE for iOS**: available on iOS 11.0+.
   ///
   ///**Official iOS API**: https://developer.apple.com/documentation/webkit/wkwebview/2873260-takesnapshot
   Future<Uint8List?> takeScreenshot({ScreenshotConfiguration? screenshotConfiguration}) async {
@@ -2088,6 +2088,35 @@ class InAppWebViewController {
     return CallAsyncJavaScriptResult(value: data["value"], error: data["error"]);
   }
 
+  ///Saves the current WebView as a web archive.
+  ///Returns the file path under which the web archive file was saved, or `null` if saving the file failed.
+  ///
+  ///[filePath] represents the file path where the archive should be placed. This value cannot be `null`.
+  ///
+  ///[autoname] if `false`, takes [filePath] to be a file.
+  ///If `true`, [filePath] is assumed to be a directory in which a filename will be chosen according to the URL of the current page.
+  ///
+  ///**NOTE for iOS**: Available on iOS 14.0+. If [autoname] is `false`, the [filePath] must ends with the [WebArchiveFormat.WEBARCHIVE] file extension.
+  ///
+  ///**NOTE for Android**: if [autoname] is `false`, the [filePath] must ends with the [WebArchiveFormat.MHT] file extension.
+  ///
+  ///**Official Android API**: https://developer.android.com/reference/android/webkit/WebView#saveWebArchive(java.lang.String,%20boolean,%20android.webkit.ValueCallback%3Cjava.lang.String%3E)
+  Future<String?> saveWebArchive(
+      {required String filePath, bool autoname = false}) async {
+    if (!autoname) {
+      if (Platform.isAndroid) {
+        assert(filePath.endsWith("." + WebArchiveFormat.MHT.toValue()));
+      } else if (Platform.isIOS) {
+        assert(filePath.endsWith("." + WebArchiveFormat.WEBARCHIVE.toValue()));
+      }
+    }
+    
+    Map<String, dynamic> args = <String, dynamic>{};
+    args.putIfAbsent("filePath", () => filePath);
+    args.putIfAbsent("autoname", () => autoname);
+    return await _channel.invokeMethod('saveWebArchive', args);
+  }
+
   ///Gets the default user agent.
   ///
   ///**Official Android API**: https://developer.android.com/reference/android/webkit/WebSettings#getDefaultUserAgent(android.content.Context)
@@ -2180,23 +2209,6 @@ class AndroidInAppWebViewController {
     return await _controller._channel.invokeMethod('pageUp', args);
   }
 
-  ///Saves the current WebView as a web archive.
-  ///Returns the filename under which the file was saved, or `null` if saving the file failed.
-  ///
-  ///[basename] the filename where the archive should be placed. This value cannot be `null`.
-  ///
-  ///[autoname] if `false`, takes basename to be a file.
-  ///If `true`, [basename] is assumed to be a directory in which a filename will be chosen according to the URL of the current page.
-  ///
-  ///**Official Android API**: https://developer.android.com/reference/android/webkit/WebView#saveWebArchive(java.lang.String,%20boolean,%20android.webkit.ValueCallback%3Cjava.lang.String%3E)
-  Future<String?> saveWebArchive(
-      {required String basename, required bool autoname}) async {
-    Map<String, dynamic> args = <String, dynamic>{};
-    args.putIfAbsent("basename", () => basename);
-    args.putIfAbsent("autoname", () => autoname);
-    return await _controller._channel.invokeMethod('saveWebArchive', args);
-  }
-
   ///Performs zoom in in this WebView.
   ///Returns `true` if zoom in succeeds, `false` if no zoom changes.
   ///
@@ -2337,14 +2349,30 @@ class IOSInAppWebViewController {
   }
 
   ///Generates PDF data from the web view’s contents asynchronously.
+  ///Returns `null` if a problem occurred.
   ///
   ///[iosWKPdfConfiguration] represents the object that specifies the portion of the web view to capture as PDF data.
+  ///
+  ///**NOTE**: available only on iOS 14.0+.
+  ///
+  ///**Official iOS API**: https://developer.apple.com/documentation/webkit/wkwebview/3650490-createpdf
   Future<Uint8List?> createPdf({IOSWKPDFConfiguration? iosWKPdfConfiguration}) async {
     Map<String, dynamic> args = <String, dynamic>{};
     args.putIfAbsent('iosWKPdfConfiguration', () => iosWKPdfConfiguration?.toMap());
     return await _controller._channel.invokeMethod('createPdf', args);
   }
 
+  ///Creates a web archive of the web view’s current contents asynchronously.
+  ///Returns `null` if a problem occurred.
+  ///
+  ///**NOTE**: available only on iOS 14.0+.
+  ///
+  ///**Official iOS API**: https://developer.apple.com/documentation/webkit/wkwebview/3650491-createwebarchivedata
+  Future<Uint8List?> createWebArchiveData() async {
+    Map<String, dynamic> args = <String, dynamic>{};
+    return await _controller._channel.invokeMethod('createWebArchiveData', args);
+  }
+
   ///Returns a Boolean value that indicates whether WebKit natively supports resources with the specified URL scheme.
   ///
   ///[urlScheme] represents the URL scheme associated with the resource.

lib/src/types.dart

@@ -4874,3 +4874,43 @@ class IOSWKPDFConfiguration {
     return toMap().toString();
   }
 }
+
+///Class that represents the known Web Archive formats used when saving a web page.
+class WebArchiveFormat {
+  final String _value;
+
+  const WebArchiveFormat._internal(this._value);
+
+  static final Set<WebArchiveFormat> values = [
+    WebArchiveFormat.MHT,
+    WebArchiveFormat.WEBARCHIVE
+  ].toSet();
+
+  static WebArchiveFormat? fromValue(String? value) {
+    if (value != null) {
+      try {
+        return WebArchiveFormat.values.firstWhere(
+                (element) => element.toValue() == value);
+      } catch (e) {
+        return null;
+      }
+    }
+    return null;
+  }
+
+  String toValue() => _value;
+
+  @override
+  String toString() => _value;
+
+  ///Web Archive format used only by Android.
+  static const MHT = const WebArchiveFormat._internal("mht");
+
+  ///Web Archive format used only by iOS.
+  static const WEBARCHIVE = const WebArchiveFormat._internal("webarchive");
+
+  bool operator ==(value) => value == _value;
+
+  @override
+  int get hashCode => _value.hashCode;
+}