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Example to test JS injection 

(cherry picked from commit 1382887d9c)
Jamie Birch 4 years ago
parent
a641a15985
commit
6409d60947
2 changed files with 82 additions and 0 deletions
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  1. 14
    0
      example/App.tsx
  2. 68
    0
      example/examples/Injection.tsx

+ 14
- 0
example/App.tsx View File 

@@ -14,6 +14,7 @@ import Alerts from './examples/Alerts';
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 import Scrolling from './examples/Scrolling';
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 import Background from './examples/Background';
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 import Uploads from './examples/Uploads';
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+import Injection from './examples/Injection';
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 const TESTS = {
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   Alerts: {
 
@@ -48,6 +49,14 @@ const TESTS = {
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       return <Uploads />;
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     },
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   },
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+  Injection: {
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+    title: 'Injection',
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+    testId: 'injection',
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+    description: 'Injection test',
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+    render() {
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+      return <Injection />;
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+    },
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+  },
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 };
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 type Props = {};
 
@@ -101,6 +110,11 @@ export default class App extends Component<Props, State> {
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             title="Background"
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             onPress={() => this._changeTest('Background')}
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           />
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+          <Button
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+            testID="testType_injection"
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+            title="Injection"
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+            onPress={() => this._changeTest('Injection')}
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+          />
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           {Platform.OS === 'android' && <Button
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             testID="testType_uploads"
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             title="Uploads"

+ 68
- 0
example/examples/Injection.tsx View File 

@@ -0,0 +1,68 @@
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+import React, {Component} from 'react';
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+import {Text, View, ScrollView} from 'react-native';
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+
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+import WebView from 'react-native-webview';
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+
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+const HTML = `
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+<!DOCTYPE html>
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+<html>
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+	<head>
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+	    <meta charset="utf-8">
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+	    <meta name="viewport" content="width=device-width, initial-scale=1">
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+	    <title>iframe test</title>
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+	</head>
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+	<body>
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+		<iframe src="https://birchlabs.co.uk/linguabrowse/infopages/obsol/iframe.html?v=1" name="iframe_0" style="width: 100%; height: 25px;"></iframe>
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+		<iframe src="https://birchlabs.co.uk/linguabrowse/infopages/obsol/iframe2.html?v=1" name="iframe_1" style="width: 100%; height: 25px;"></iframe>
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+		<iframe src="https://www.ebay.co.uk" name="iframe_2" style="width: 100%; height: 25px;"></iframe>
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+	</body>
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+</html>
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+`;
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+
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+type Props = {};
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+type State = {
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+  backgroundColor: string,
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+};
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+
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+export default class Injection extends Component<Props, State> {
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+  state = {
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+    backgroundColor: '#FF00FF00'
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+  };
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+
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+  render() {
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+    return (
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+      <ScrollView>
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+        <View style={{ }}>
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+          <View style={{ height: 120 }}>
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+            <WebView
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+              /**
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+               * This HTML is a copy of a multi-frame JS injection test that I had lying around.
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+               * @see https://birchlabs.co.uk/linguabrowse/infopages/obsol/iframeTest.html
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+               */
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+              source={{ html: HTML }}
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+              automaticallyAdjustContentInsets={false}
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+              style={{backgroundColor:'#00000000'}}
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+
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+              /* Must be populated in order for `messagingEnabled` to be `true` to activate the
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+               * JS injection user scripts, consistent with current behaviour. This is undesirable,
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+               * so needs addressing in a follow-up PR. */
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+              onMessage={() => {}}
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+              /* We set this property in each frame */
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+              injectedJavaScriptBeforeContentLoaded={`window.self.colourToUse = "orange";`}
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+              injectedJavaScriptForMainFrameOnly={false}
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+              /* We read the colourToUse property in each frame to recolour each frame */
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+              injectedJavaScript={`window.self.document.body.style.backgroundColor = window.self.colourToUse;`}
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+            />
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+          </View>
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+        </View>
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+        <Text>This test presents three iframes: iframe_0 (yellow); iframe_1 (pink); and iframe_2 (transparent, because its 'X-Frame-Options' is set to 'SAMEORIGIN').</Text>
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+        <Text>Before injection, the webpage's background is the browser's default value (transparent or white) and each frame has its natural colour.</Text>
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+        <Text>1) At injection time "beforeContentLoaded", a variable will be set in each frame to set 'orange' as the "colour to be used".</Text>
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+        <Text>2) At injection time "afterContentLoaded", that variable will be read, and thus the colour orange will be injected into all frames.</Text>
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+        <Text>✅ If all frames become orange, then multi-frame injection is supported and both injection times are supported.</Text>
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+        <Text>❌ If no frames become orange, then only one (or neither) of the injection times are supported, or even injection into the main frame is failing.</Text>
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+        <Text>❌ If only the main frame becomes orange, then multi-frame injection is not supported.</Text>
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+      </ScrollView>
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+    );
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+  }
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+}