From 9f701dd4d3c5b2ca48f5dbe2e31d29d2c3943881 Mon Sep 17 00:00:00 2001
From: Rafal Wachol <gorudonu@gmail.com>
Date: Thu, 25 Jul 2019 02:15:03 +0100
Subject: [PATCH 1/4] added postUrl for Android webview

---
 .../webviewflutter/FlutterWebView.java        | 26 ++++++++++++++++++-
 .../lib/platform_interface.dart               |  7 +++--
 .../lib/src/webview_method_channel.dart       |  1 +
 .../webview_flutter/lib/webview_flutter.dart  |  5 ++++
 4 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java b/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
index 838987714d31..e813466f0047 100644
--- a/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
+++ b/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
@@ -8,6 +8,7 @@
 import android.content.Context;
 import android.os.Build;
 import android.os.Handler;
+import android.util.Log;
 import android.view.View;
 import android.webkit.WebStorage;
 import android.webkit.WebViewClient;
@@ -17,12 +18,16 @@
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.MethodChannel.Result;
 import io.flutter.plugin.platform.PlatformView;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
 public class FlutterWebView implements PlatformView, MethodCallHandler {
   private static final String JS_CHANNEL_NAMES_FIELD = "javascriptChannelNames";
+  private static final String TAG = "FlutterWebView";
   private final InputAwareWebView webView;
   private final MethodChannel methodChannel;
   private final FlutterWebViewClient flutterWebViewClient;
@@ -53,7 +58,17 @@ public class FlutterWebView implements PlatformView, MethodCallHandler {
 
     if (params.containsKey("initialUrl")) {
       String url = (String) params.get("initialUrl");
-      webView.loadUrl(url);
+      Map<String, Object> postParameters = (Map<String, Object>) params.get("initialPostParameters");
+      if(postParameters != null && !postParameters.isEmpty()) {
+        try {
+          webView.postUrl(url, initialParametersToString(postParameters).getBytes());
+        } catch (UnsupportedEncodingException e) {
+          Log.e(TAG, "" + e.getMessage(), e);
+        }
+      } else {
+        webView.loadUrl(url);
+      }
+
     }
   }
 
@@ -126,6 +141,15 @@ public void onMethodCall(MethodCall methodCall, Result result) {
     }
   }
 
+  private static String initialParametersToString(Map<String, Object> parameters) throws UnsupportedEncodingException {
+    StringBuilder sb = new StringBuilder();
+    for (Map.Entry<String, Object> entry : parameters.entrySet()) {
+      sb.append(URLEncoder.encode(entry.getKey(), "UTF-8") + "=" + URLEncoder.encode(entry.getValue().toString(), "UTF-8") + "&");
+    }
+
+    return sb.deleteCharAt(sb.length() - 1).toString();
+  }
+
   @SuppressWarnings("unchecked")
   private void loadUrl(MethodCall methodCall, Result result) {
     Map<String, Object> request = (Map<String, Object>) methodCall.arguments;
diff --git a/packages/webview_flutter/lib/platform_interface.dart b/packages/webview_flutter/lib/platform_interface.dart
index bfb5b6255421..00fdad1d3dd5 100644
--- a/packages/webview_flutter/lib/platform_interface.dart
+++ b/packages/webview_flutter/lib/platform_interface.dart
@@ -185,13 +185,16 @@ class WebSettings {
 /// Configuration to use when creating a new [WebViewPlatformController].
 class CreationParams {
   CreationParams(
-      {this.initialUrl, this.webSettings, this.javascriptChannelNames});
+      {this.initialUrl, this.initialPostParameters, this.webSettings, this.javascriptChannelNames});
 
   /// The initialUrl to load in the webview.
   ///
   /// When null the webview will be created without loading any page.
   final String initialUrl;
 
+  /// The initial POST parameters used on initial URL load.
+  final Map initialPostParameters;
+
   /// The initial [WebSettings] for the new webview.
   ///
   /// This can later be updated with [WebViewPlatformController.updateSettings].
@@ -212,7 +215,7 @@ class CreationParams {
 
   @override
   String toString() {
-    return '$runtimeType(initialUrl: $initialUrl, settings: $webSettings, javascriptChannelNames: $javascriptChannelNames)';
+    return '$runtimeType(initialUrl: $initialUrl, initialPostParameters: $initialPostParameters, settings: $webSettings, javascriptChannelNames: $javascriptChannelNames)';
   }
 }
 
diff --git a/packages/webview_flutter/lib/src/webview_method_channel.dart b/packages/webview_flutter/lib/src/webview_method_channel.dart
index ce9988743853..bccf32cca980 100644
--- a/packages/webview_flutter/lib/src/webview_method_channel.dart
+++ b/packages/webview_flutter/lib/src/webview_method_channel.dart
@@ -133,6 +133,7 @@ class MethodChannelWebViewPlatform implements WebViewPlatformController {
       CreationParams creationParams) {
     return <String, dynamic>{
       'initialUrl': creationParams.initialUrl,
+      'initialPostParameters': creationParams.initialPostParameters,
       'settings': _webSettingsToMap(creationParams.webSettings),
       'javascriptChannelNames': creationParams.javascriptChannelNames.toList(),
     };
diff --git a/packages/webview_flutter/lib/webview_flutter.dart b/packages/webview_flutter/lib/webview_flutter.dart
index 3c0175e2f22b..a348a3059363 100644
--- a/packages/webview_flutter/lib/webview_flutter.dart
+++ b/packages/webview_flutter/lib/webview_flutter.dart
@@ -115,6 +115,7 @@ class WebView extends StatefulWidget {
     Key key,
     this.onWebViewCreated,
     this.initialUrl,
+    this.initialPostParameters,
     this.javascriptMode = JavascriptMode.disabled,
     this.javascriptChannels,
     this.navigationDelegate,
@@ -174,6 +175,9 @@ class WebView extends StatefulWidget {
   /// The initial URL to load.
   final String initialUrl;
 
+  /// The initial POST parameters used on initial URL load.
+  final Map initialPostParameters;
+
   /// Whether Javascript execution is enabled.
   final JavascriptMode javascriptMode;
 
@@ -315,6 +319,7 @@ class _WebViewState extends State<WebView> {
 CreationParams _creationParamsfromWidget(WebView widget) {
   return CreationParams(
     initialUrl: widget.initialUrl,
+    initialPostParameters: widget.initialPostParameters,
     webSettings: _webSettingsFromWidget(widget),
     javascriptChannelNames: _extractChannelNames(widget.javascriptChannels),
   );

From 4a65213062a8c495e52154f0e26df5adb9c482e3 Mon Sep 17 00:00:00 2001
From: Rafal Wachol <gorudonu@gmail.com>
Date: Thu, 8 Aug 2019 03:13:47 +0100
Subject: [PATCH 2/4] added ios implementation

---
 .../ios/Classes/FlutterWebView.m              | 56 ++++++++++++++++---
 1 file changed, 48 insertions(+), 8 deletions(-)

diff --git a/packages/webview_flutter/ios/Classes/FlutterWebView.m b/packages/webview_flutter/ios/Classes/FlutterWebView.m
index 87cb0f57377b..715fb29a041d 100644
--- a/packages/webview_flutter/ios/Classes/FlutterWebView.m
+++ b/packages/webview_flutter/ios/Classes/FlutterWebView.m
@@ -77,14 +77,20 @@ - (instancetype)initWithFrame:(CGRect)frame
       [weakSelf onMethodCall:call result:result];
     }];
 
-    [self applySettings:settings];
-    // TODO(amirh): return an error if apply settings failed once it's possible to do so.
-    // https://github.com/flutter/flutter/issues/36228
-
-    NSString* initialUrl = args[@"initialUrl"];
-    if ([initialUrl isKindOfClass:[NSString class]]) {
-      [self loadUrl:initialUrl];
-    }
+      [self applySettings:settings];
+      // TODO(amirh): return an error if apply settings failed once it's possible to do so.
+      // https://github.com/flutter/flutter/issues/36228
+      
+      NSString* initialUrl = args[@"initialUrl"];
+      if ([initialUrl isKindOfClass:[NSString class]]) {
+          NSMutableDictionary<NSString *, NSObject*>* initialPostParameters = args[@"initialPostParameters"];
+          if(initialPostParameters == nil || initialPostParameters == (id)[NSNull null]) {
+              [self loadUrl:initialUrl];
+          } else {
+              [self loadUrlPost:initialUrl withHeaders:[NSMutableDictionary dictionary] initialParams:initialPostParameters];
+          }
+          
+      }
   }
   return self;
 }
@@ -332,6 +338,40 @@ - (bool)loadUrl:(NSString*)url withHeaders:(NSDictionary<NSString*, NSString*>*)
   return true;
 }
 
+- (bool)loadUrlPost:(NSString*)url withHeaders:(NSDictionary<NSString*, NSString*>*)headers initialParams:(NSDictionary<NSString*, NSObject*>*)params {
+    
+    NSURL* nsUrl = [NSURL URLWithString:url];
+    if (!nsUrl) {
+        return false;
+    }
+
+    NSLog(@"got params %@", params);
+    NSMutableString *resultString = [NSMutableString string];
+    for (NSString* key in [params allKeys]){
+        if ([resultString length]>0)
+            [resultString appendString:@"&"];
+        [resultString appendFormat:@"%@=%@", key, [params objectForKey:key]];
+    }
+    
+    NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:nsUrl];
+
+
+    NSData *postData = [resultString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
+    NSString *contentLength = [NSString stringWithFormat:@"%d", postData.length];
+    
+
+    [request setHTTPMethod:@"POST"];
+    [request setHTTPBody:postData];
+    [request setValue:contentLength forHTTPHeaderField:@"Content-Length"];
+    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
+
+    
+
+    [request setAllHTTPHeaderFields:headers];
+    [_webView loadRequest:request];
+    return true;
+}
+
 - (void)registerJavaScriptChannels:(NSSet*)channelNames
                         controller:(WKUserContentController*)userContentController {
   for (NSString* channelName in channelNames) {

From 6a913c823ed2ab093f196f0ff81b86212d958e2f Mon Sep 17 00:00:00 2001
From: Rafal Wachol <gorudonu@gmail.com>
Date: Wed, 20 Nov 2019 13:18:15 +0000
Subject: [PATCH 3/4] Changed initial post parameters to controller postUrl
 Moved encoding to client side

---
 .../webviewflutter/FlutterWebView.java        | 27 +++++++------
 .../ios/Classes/FlutterWebView.m              | 39 +++++++------------
 .../lib/platform_interface.dart               | 19 ++++++---
 .../lib/src/webview_method_channel.dart       | 12 +++++-
 .../webview_flutter/lib/webview_flutter.dart  | 19 ++++++---
 5 files changed, 68 insertions(+), 48 deletions(-)

diff --git a/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java b/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
index b2d1996ccfc3..4ccecde07b95 100644
--- a/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
+++ b/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
@@ -71,17 +71,7 @@ public class FlutterWebView implements PlatformView, MethodCallHandler {
     }
     if (params.containsKey("initialUrl")) {
       String url = (String) params.get("initialUrl");
-      Map<String, Object> postParameters = (Map<String, Object>) params.get("initialPostParameters");
-      if(postParameters != null && !postParameters.isEmpty()) {
-        try {
-          webView.postUrl(url, initialParametersToString(postParameters).getBytes());
-        } catch (UnsupportedEncodingException e) {
-          Log.e(TAG, "" + e.getMessage(), e);
-        }
-      } else {
-        webView.loadUrl(url);
-      }
-
+      webView.loadUrl(url);
     }
   }
 
@@ -116,6 +106,9 @@ public void onMethodCall(MethodCall methodCall, Result result) {
       case "loadUrl":
         loadUrl(methodCall, result);
         break;
+      case "postUrl":
+        postUrl(methodCall,result);
+        break;
       case "updateSettings":
         updateSettings(methodCall, result);
         break;
@@ -178,6 +171,18 @@ private void loadUrl(MethodCall methodCall, Result result) {
     result.success(null);
   }
 
+  @SuppressWarnings("unchecked")
+  private void postUrl(MethodCall methodCall, Result result) {
+    Map<String, Object> request = (Map<String, Object>) methodCall.arguments;
+    String url = (String) request.get("url");
+
+    byte[] params = (byte[]) request.get("params");
+
+    webView.postUrl(url, params);
+    
+    result.success(null);
+  }
+
   private void canGoBack(Result result) {
     result.success(webView.canGoBack());
   }
diff --git a/packages/webview_flutter/ios/Classes/FlutterWebView.m b/packages/webview_flutter/ios/Classes/FlutterWebView.m
index 4a41e225da3c..9d46828f5b52 100644
--- a/packages/webview_flutter/ios/Classes/FlutterWebView.m
+++ b/packages/webview_flutter/ios/Classes/FlutterWebView.m
@@ -5,6 +5,7 @@
 #import "FlutterWebView.h"
 #import "FLTWKNavigationDelegate.h"
 #import "JavaScriptChannelHandler.h"
+#import <os/log.h>
 
 @implementation FLTWebViewFactory {
   NSObject<FlutterBinaryMessenger>* _messenger;
@@ -83,13 +84,7 @@ - (instancetype)initWithFrame:(CGRect)frame
       
       NSString* initialUrl = args[@"initialUrl"];
       if ([initialUrl isKindOfClass:[NSString class]]) {
-          NSMutableDictionary<NSString *, NSObject*>* initialPostParameters = args[@"initialPostParameters"];
-          if(initialPostParameters == nil || initialPostParameters == (id)[NSNull null]) {
-              [self loadUrl:initialUrl];
-          } else {
-              [self loadUrlPost:initialUrl withHeaders:[NSMutableDictionary dictionary] initialParams:initialPostParameters];
-          }
-          
+          [self loadUrl:initialUrl];
       }
   }
   return self;
@@ -104,6 +99,8 @@ - (void)onMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
     [self onUpdateSettings:call result:result];
   } else if ([[call method] isEqualToString:@"loadUrl"]) {
     [self onLoadUrl:call result:result];
+  } else if ([[call method] isEqualToString:@"postUrl"]) {
+    [self postUrl:call result:result];
   } else if ([[call method] isEqualToString:@"canGoBack"]) {
     [self onCanGoBack:call result:result];
   } else if ([[call method] isEqualToString:@"canGoForward"]) {
@@ -346,38 +343,28 @@ - (bool)loadUrl:(NSString*)url withHeaders:(NSDictionary<NSString*, NSString*>*)
   return true;
 }
 
-- (bool)loadUrlPost:(NSString*)url withHeaders:(NSDictionary<NSString*, NSString*>*)headers initialParams:(NSDictionary<NSString*, NSObject*>*)params {
+- (bool) postUrl:(FlutterMethodCall*)call result:(FlutterResult)result {
+    NSDictionary<NSString*, NSObject*>* args = [call arguments];
     
+    NSString* url = (NSString*)args[@"url"];
     NSURL* nsUrl = [NSURL URLWithString:url];
     if (!nsUrl) {
         return false;
     }
 
-    NSLog(@"got params %@", params);
-    NSMutableString *resultString = [NSMutableString string];
-    for (NSString* key in [params allKeys]){
-        if ([resultString length]>0)
-            [resultString appendString:@"&"];
-        [resultString appendFormat:@"%@=%@", key, [params objectForKey:key]];
-    }
-    
     NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:nsUrl];
-
-
-    NSData *postData = [resultString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
-    NSString *contentLength = [NSString stringWithFormat:@"%d", postData.length];
+    FlutterStandardTypedData* postData = (FlutterStandardTypedData*)args[@"params"];
+    NSString* contentLength = @(postData.data.length).stringValue;
     
-
     [request setHTTPMethod:@"POST"];
-    [request setHTTPBody:postData];
-    [request setValue:contentLength forHTTPHeaderField:@"Content-Length"];
-    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
-
+    [request setHTTPBody:postData.data];
     
+    [request setValue:contentLength  forHTTPHeaderField:@"Content-Length"];
+    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
 
-    [request setAllHTTPHeaderFields:headers];
     [_webView loadRequest:request];
     return true;
+
 }
 
 - (void)registerJavaScriptChannels:(NSSet*)channelNames
diff --git a/packages/webview_flutter/lib/platform_interface.dart b/packages/webview_flutter/lib/platform_interface.dart
index 6aadf61b8f64..a3d1738d2554 100644
--- a/packages/webview_flutter/lib/platform_interface.dart
+++ b/packages/webview_flutter/lib/platform_interface.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'dart:async';
+import 'dart:typed_data';
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
@@ -61,6 +62,18 @@ abstract class WebViewPlatformController {
         "WebView loadUrl is not implemented on the current platform");
   }
 
+  /// Post to the specified URL.
+  ///
+  /// `url` must not be null
+  /// `params` must not be null
+  ///
+  /// `params` have to be ascii encoded
+  /// Throws an ArgumentError if `url` is not a valid URL string.
+  Future<void> postUrl(String url, Uint8List params) {
+    throw UnimplementedError(
+        "Webview postUrl is not implemented on the current platform");
+  }
+
   /// Updates the webview settings.
   ///
   /// Any non null field in `settings` will be set as the new setting value.
@@ -260,7 +273,6 @@ class WebSettings {
 class CreationParams {
   CreationParams({
     this.initialUrl,
-    this.initialPostParameters,
     this.webSettings,
     this.javascriptChannelNames,
     this.userAgent,
@@ -273,9 +285,6 @@ class CreationParams {
   /// When null the webview will be created without loading any page.
   final String initialUrl;
 
-  /// The initial POST parameters used on initial URL load.
-  final Map initialPostParameters;
-
   /// The initial [WebSettings] for the new webview.
   ///
   /// This can later be updated with [WebViewPlatformController.updateSettings].
@@ -304,7 +313,7 @@ class CreationParams {
 
   @override
   String toString() {
-    return '$runtimeType(initialUrl: $initialUrl, initialPostParameters: $initialPostParameters, settings: $webSettings, javascriptChannelNames: $javascriptChannelNames, UserAgent: $userAgent)';
+    return '$runtimeType(initialUrl: $initialUrl, settings: $webSettings, javascriptChannelNames: $javascriptChannelNames, UserAgent: $userAgent)';
   }
 }
 
diff --git a/packages/webview_flutter/lib/src/webview_method_channel.dart b/packages/webview_flutter/lib/src/webview_method_channel.dart
index e19d1f177685..324db57adc15 100644
--- a/packages/webview_flutter/lib/src/webview_method_channel.dart
+++ b/packages/webview_flutter/lib/src/webview_method_channel.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'dart:async';
+import 'dart:typed_data';
 
 import 'package:flutter/services.dart';
 
@@ -55,6 +56,16 @@ class MethodChannelWebViewPlatform implements WebViewPlatformController {
     });
   }
 
+  @override
+  Future<void> postUrl(String url, Uint8List params) async {
+    assert(url != null);
+    assert(params != null);
+    return _channel.invokeMethod('postUrl', <String, dynamic> {
+      'url': url,
+      'params': params,
+    });
+  }
+
   @override
   Future<String> currentUrl() => _channel.invokeMethod<String>('currentUrl');
 
@@ -144,7 +155,6 @@ class MethodChannelWebViewPlatform implements WebViewPlatformController {
       CreationParams creationParams) {
     return <String, dynamic>{
       'initialUrl': creationParams.initialUrl,
-      'initialPostParameters': creationParams.initialPostParameters,
       'settings': _webSettingsToMap(creationParams.webSettings),
       'javascriptChannelNames': creationParams.javascriptChannelNames.toList(),
       'userAgent': creationParams.userAgent,
diff --git a/packages/webview_flutter/lib/webview_flutter.dart b/packages/webview_flutter/lib/webview_flutter.dart
index 05d39ff693e9..ab84d6f80d33 100644
--- a/packages/webview_flutter/lib/webview_flutter.dart
+++ b/packages/webview_flutter/lib/webview_flutter.dart
@@ -134,7 +134,6 @@ class WebView extends StatefulWidget {
     Key key,
     this.onWebViewCreated,
     this.initialUrl,
-    this.initialPostParameters,
     this.javascriptMode = JavascriptMode.disabled,
     this.javascriptChannels,
     this.navigationDelegate,
@@ -198,9 +197,6 @@ class WebView extends StatefulWidget {
   /// The initial URL to load.
   final String initialUrl;
 
-  /// The initial POST parameters used on initial URL load.
-  final Map initialPostParameters;
-
   /// Whether Javascript execution is enabled.
   final JavascriptMode javascriptMode;
 
@@ -364,7 +360,6 @@ class _WebViewState extends State<WebView> {
 CreationParams _creationParamsfromWidget(WebView widget) {
   return CreationParams(
     initialUrl: widget.initialUrl,
-    initialPostParameters: widget.initialPostParameters,
     webSettings: _webSettingsFromWidget(widget),
     javascriptChannelNames: _extractChannelNames(widget.javascriptChannels),
     userAgent: widget.userAgent,
@@ -508,6 +503,20 @@ class WebViewController {
     return _webViewPlatformController.loadUrl(url, headers);
   }
 
+  /// Post to the specified URL.
+  ///
+  /// `url` must not be null
+  /// `params` must not be null
+  ///
+  /// `params` have to be ascii encoded
+  /// Throws an ArgumentError if `url` is not a valid URL string.
+  Future<void> postUrl(String url, List<int> params) async {
+    assert(url != null);
+    assert(params != null);
+    _validateUrlString(url);
+    return _webViewPlatformController.postUrl(url, params);
+  }
+
   /// Accessor to the current URL that the WebView is displaying.
   ///
   /// If [WebView.initialUrl] was never specified, returns `null`.

From 059613662751979c7e99ecb6a2f8cc5d4ece9376 Mon Sep 17 00:00:00 2001
From: Rafal Wachol <gorudonu@gmail.com>
Date: Thu, 21 Nov 2019 12:34:12 +0000
Subject: [PATCH 4/4] reformatted code

---
 .../webviewflutter/FlutterWebView.java        | 15 +++--
 .../ios/Classes/FlutterWebView.m              | 55 +++++++++----------
 .../lib/src/webview_method_channel.dart       |  2 +-
 3 files changed, 37 insertions(+), 35 deletions(-)

diff --git a/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java b/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
index 6ca6e8f8108a..44ea64e3e90b 100644
--- a/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
+++ b/packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java
@@ -9,7 +9,6 @@
 import android.hardware.display.DisplayManager;
 import android.os.Build;
 import android.os.Handler;
-import android.util.Log;
 import android.view.View;
 import android.webkit.WebStorage;
 import android.webkit.WebViewClient;
@@ -19,7 +18,6 @@
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.MethodChannel.Result;
 import io.flutter.plugin.platform.PlatformView;
-
 import java.io.UnsupportedEncodingException;
 import java.net.URLEncoder;
 import java.util.Collections;
@@ -127,7 +125,7 @@ public void onMethodCall(MethodCall methodCall, Result result) {
         loadUrl(methodCall, result);
         break;
       case "postUrl":
-        postUrl(methodCall,result);
+        postUrl(methodCall, result);
         break;
       case "updateSettings":
         updateSettings(methodCall, result);
@@ -170,10 +168,15 @@ public void onMethodCall(MethodCall methodCall, Result result) {
     }
   }
 
-  private static String initialParametersToString(Map<String, Object> parameters) throws UnsupportedEncodingException {
+  private static String initialParametersToString(Map<String, Object> parameters)
+      throws UnsupportedEncodingException {
     StringBuilder sb = new StringBuilder();
     for (Map.Entry<String, Object> entry : parameters.entrySet()) {
-      sb.append(URLEncoder.encode(entry.getKey(), "UTF-8") + "=" + URLEncoder.encode(entry.getValue().toString(), "UTF-8") + "&");
+      sb.append(
+          URLEncoder.encode(entry.getKey(), "UTF-8")
+              + "="
+              + URLEncoder.encode(entry.getValue().toString(), "UTF-8")
+              + "&");
     }
 
     return sb.deleteCharAt(sb.length() - 1).toString();
@@ -199,7 +202,7 @@ private void postUrl(MethodCall methodCall, Result result) {
     byte[] params = (byte[]) request.get("params");
 
     webView.postUrl(url, params);
-    
+
     result.success(null);
   }
 
diff --git a/packages/webview_flutter/ios/Classes/FlutterWebView.m b/packages/webview_flutter/ios/Classes/FlutterWebView.m
index 9d46828f5b52..46ec19aec68d 100644
--- a/packages/webview_flutter/ios/Classes/FlutterWebView.m
+++ b/packages/webview_flutter/ios/Classes/FlutterWebView.m
@@ -3,9 +3,9 @@
 // found in the LICENSE file.
 
 #import "FlutterWebView.h"
+#import <os/log.h>
 #import "FLTWKNavigationDelegate.h"
 #import "JavaScriptChannelHandler.h"
-#import <os/log.h>
 
 @implementation FLTWebViewFactory {
   NSObject<FlutterBinaryMessenger>* _messenger;
@@ -78,14 +78,14 @@ - (instancetype)initWithFrame:(CGRect)frame
       [weakSelf onMethodCall:call result:result];
     }];
 
-      [self applySettings:settings];
-      // TODO(amirh): return an error if apply settings failed once it's possible to do so.
-      // https://github.com/flutter/flutter/issues/36228
-      
-      NSString* initialUrl = args[@"initialUrl"];
-      if ([initialUrl isKindOfClass:[NSString class]]) {
-          [self loadUrl:initialUrl];
-      }
+    [self applySettings:settings];
+    // TODO(amirh): return an error if apply settings failed once it's possible to do so.
+    // https://github.com/flutter/flutter/issues/36228
+
+    NSString* initialUrl = args[@"initialUrl"];
+    if ([initialUrl isKindOfClass:[NSString class]]) {
+      [self loadUrl:initialUrl];
+    }
   }
   return self;
 }
@@ -343,28 +343,27 @@ - (bool)loadUrl:(NSString*)url withHeaders:(NSDictionary<NSString*, NSString*>*)
   return true;
 }
 
-- (bool) postUrl:(FlutterMethodCall*)call result:(FlutterResult)result {
-    NSDictionary<NSString*, NSObject*>* args = [call arguments];
-    
-    NSString* url = (NSString*)args[@"url"];
-    NSURL* nsUrl = [NSURL URLWithString:url];
-    if (!nsUrl) {
-        return false;
-    }
+- (bool)postUrl:(FlutterMethodCall*)call result:(FlutterResult)result {
+  NSDictionary<NSString*, NSObject*>* args = [call arguments];
 
-    NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:nsUrl];
-    FlutterStandardTypedData* postData = (FlutterStandardTypedData*)args[@"params"];
-    NSString* contentLength = @(postData.data.length).stringValue;
-    
-    [request setHTTPMethod:@"POST"];
-    [request setHTTPBody:postData.data];
-    
-    [request setValue:contentLength  forHTTPHeaderField:@"Content-Length"];
-    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
+  NSString* url = (NSString*)args[@"url"];
+  NSURL* nsUrl = [NSURL URLWithString:url];
+  if (!nsUrl) {
+    return false;
+  }
+
+  NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:nsUrl];
+  FlutterStandardTypedData* postData = (FlutterStandardTypedData*)args[@"params"];
+  NSString* contentLength = @(postData.data.length).stringValue;
 
-    [_webView loadRequest:request];
-    return true;
+  [request setHTTPMethod:@"POST"];
+  [request setHTTPBody:postData.data];
 
+  [request setValue:contentLength forHTTPHeaderField:@"Content-Length"];
+  [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
+
+  [_webView loadRequest:request];
+  return true;
 }
 
 - (void)registerJavaScriptChannels:(NSSet*)channelNames
diff --git a/packages/webview_flutter/lib/src/webview_method_channel.dart b/packages/webview_flutter/lib/src/webview_method_channel.dart
index 8ffc3329ff9d..090d9bd81860 100644
--- a/packages/webview_flutter/lib/src/webview_method_channel.dart
+++ b/packages/webview_flutter/lib/src/webview_method_channel.dart
@@ -60,7 +60,7 @@ class MethodChannelWebViewPlatform implements WebViewPlatformController {
   Future<void> postUrl(String url, Uint8List params) async {
     assert(url != null);
     assert(params != null);
-    return _channel.invokeMethod('postUrl', <String, dynamic> {
+    return _channel.invokeMethod('postUrl', <String, dynamic>{
       'url': url,
       'params': params,
     });