我试图了解如何使用具有不同于默认 Pub/Dart 结构的文件结构的 polymer (因此教程在这里对我没有帮助)。我已阅读以下页面:
- https://www.dartlang.org/polymer/app-directories.html (如果说实话，我太不知所措了)
- https://www.dartlang.org/docs/tutorials/polymer-intro
- https://www.dartlang.org/docs/tutorials/forms/#binding-data
这是我的结构:
src/
controllers/, models/, views/ #Go related files
main.go #Go web server
static/ #CSS, Images, Dart
...
styles/
scripts/
packages/ #links to actual packages
web/
packages/ #link to ../packages
ui-elements.html
main.dart
pubspec.yaml
...
src/views/index.html - 站点的索引页
...
<head>
<link rel="import" href="scripts/web/ui-elements.html"/>
</head>
<body>
<ui-watch></ui-watch>
<!-- Does it should come first or after polymer/init.dart? -->
<script type="application/dart" src="scripts/web/main.dart"></script>
<!-- path doesn't resolve correctly so I commented it and place initialization into the main.dart file itself -->
<!--<script type="application/dart">export 'package:polymer/init.dart';</script>-->
<script src="scripts/packages/browser/dart.js"></script>
</body>
src/static/scripts/web/main.dart
import 'dart:html';
import 'dart:async';
import 'package:polymer/polymer.dart';
export 'package:polymer/init.dart';
@CustomTag('ui-watch')
class UIWatch extends PolymerElement {
@observable String counter = '00:00';
UIWatch.created() : super.created();
ButtonElement startWatch;
@override
void detached() {
super.detached();
}
}
main() {
initPolymer();
}
src/static/scripts/web/ui-elements.html
<link rel="import" href="packages/polymer/polymer.html">
<polymer-element name="ui-watch">
<template>
<div>{{counter}}</div>
<div>
<button id="startWatch">Start</button>
</div>
</template>
<!--<script type="application/dart" src="main.dart"></script>-->
</polymer-element>
运行后，我得到以下信息:
GET http://localhost:8080/packages/polymer/polymer.html 404 (Not Found)
Error loading html import from path `polymer.html`
Found bad packages uri in html import. All packages uris should point to the
packages symlink in the same folder as the entry point.
Entry point: http://localhost:8080/
Owner document: http://localhost:8080/scripts/web/ui-elements.html
Current import: <link rel="import" href="packages/polymer/polymer.html">
#I've already try this path, but I got the same error
Corrected import: <link rel="import" href="../../packages/polymer/polymer.html">
For more information, please see:
https://www.dartlang.org/polymer/app-directories.html#into-a-non-dart-non-entry-point
warning: http://localhost:8080/packages/polymer/polymer.html not found.
这是怎么回事？我对如何组织这些文件有点困惑。无论我尝试什么，路径都无法正确解析。我认为，这里的问题之一是我不了解 polymer/polymer.html 和 polymer/init.dart 实际上做了什么以及它们应该包含在什么顺序中。
最佳答案
那是行不通的。如果您偏离 pub 包结构 pub build 或 pub serve 将无法创建可运行的 Dart 或 JavaScript 应用程序。
如果您希望您的 go web 服务器为 Dart 客户端提供服务，则只需要将构建输出放在目录中，go 提供静态内容，而不是 Dart 源文件。无论如何都不应该部署它们。
对于开发，您应该使用代理或修改您的 go 服务器以充当代理，将所有与 Dart 相关的请求转发到 pub serve。
关于html - 如何使用具有不同文件结构的 Dart Polymer？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29589373/