我有一个带有 Go 服务器的 Flutter Web 应用程序,通过 AWS CodePipeline(用于 CI/CD)部署到 AWS EC2 实例。我的 EC2 设置是
Go 1 running on 64bit Amazon Linux 2/3.7.2
.
Flutter Web 应用程序在本地服务器上启动时或使用
flutter run --release
命令时可以正常运行。但是,当部署到我的 EC2 实例时,我得到以下空白页面,控制台中显示错误Uncaught SyntaxError: Unexpected token '<' (at flutter.js:1:1)
(注意:下一个错误,_flutter is not defined
是由第一个错误引起的)。
奇怪的是,当我查看错误所指的
flutter.js
文件时,该文件显示了错误的内容;它显示了 index.html
文件的内容,正如错误指出的那样,该文件在第 1:1 行确实有一个 <
字符。
下一步,我查看我的 EC2 实例(通过 SSH)以查看我部署的
flutter.js
文件。部署的文件是正确的,不是控制台错误指出的那个。
那么这里发生了什么?这是将 Flutter Web 应用程序部署到 AWS Go 服务器的设置问题还是兼容性问题?如果有任何帮助,下面是完整的 index.html 文件。
注意:我无法在 SO 或其他地方发布的其他类似问题中找到解决方案。
index.html
<!DOCTYPE html>
<html>
<head>
<!--
If you are serving your web app in a path other than the root, change the
href value below to reflect the base path you are serving from.
The path provided below has to start and end with a slash "/" in order for
it to work correctly.
For more details:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
This is a placeholder for base href that will be replaced by the value of
the `--base-href` argument provided to `flutter build`.
-->
<base href="/">
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="A new Flutter project.">
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="test_app_1">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Favicon -->
<link rel="icon" type="image/png" href="favicon.png"/>
<title>test_app_1</title>
<link rel="manifest" href="manifest.json">
<script>
// The value below is injected by flutter build, do not touch.
var serviceWorkerVersion = null;
</script>
<!-- This script adds the flutter initialization JS code -->
<script src="flutter.js" defer></script>
</head>
<body>
<script>
window.addEventListener('load', function(ev) {
_flutter.loader.loadEntrypoint({
entrypointUrl: "/main.dart.js",
serviceWorker: {
serviceWorkerVersion: serviceWorkerVersion,
serviceWorkerUrl: "/flutter_service_worker.js?v=",
},
onEntrypointLoaded: function(engineInitializer) {
engineInitializer.initializeEngine().then(function(appRunner) {
appRunner.runApp();
});
}
});
});
</script>
</body>
</html>