douyiavxxh02727
2016-03-08 13:17
浏览 63
已采纳

无法使用Dart和angular2客户端运行GolLang后端

I use this tutorial to make a web application with GoLang, Angular2 and Dart, but when i start backend by console command 'backend', and route in browser to "localhost:8080/" it must call method from Dart's class "Hello" but it doesn't call, and i get 404 error. All code i got from tutorial and didn't change anything. And i can't find any other tutorials. Can you explain me what wrong am i doing?

GoLang code:

func main() {
   http.Handle("/", http.FileServer(http.Dir("./app/web/")))

   fmt.Println("Text")
   http.HandleFunc("/api/hello", helloWorld)
   http.ListenAndServe(":8080", nil)

}
func helloWorld(w http.ResponseWriter, r *http.Request) {
   data := struct {
       Message string
   }{
       "Hello, World",
   }

   if err := json.NewEncoder(w).Encode(data); err != nil {
       log.Println(err)
   }
}

and angular dart code:

class AppComponent {
   Hello hello = new Hello();
}

class Hello{
  String message;

  Hello(){

    HttpRequest.getString('/api/hello')
        .then((String content) {
          Map parsedMap = JSON.decode(content);
          message = parsedMap["Message"];
        })
        .catchError((Error error) {
          print(error.toString());
        });
  }
}

and project structure :enter image description here

图片转代码服务由CSDN问答提供 功能建议

我使用此教程使用GoLang，Angular2和Dart制作Web应用程序，但是当我通过控制台命令“ backend”启动后端并在浏览器中路由到“ localhost：8080 /”时，它必须从 Dart的类“ Hello”，但没有调用，并且出现404错误。 我从教程中获得的所有代码均未更改。 而且我找不到其他教程。 您能解释一下我在做什么错吗？

GoLang代码： 

  func main（）{
 http.Handle（“  /“，http.FileServer（http.Dir（” ./ app / web /“）））
 
 fmt.Println（” Text“）
 http.HandleFunc（” / api / hello“，helloWorld）\  n http.ListenAndServe（“：8080”，nil）
 
} 
func helloWorld（w http.ResponseWriter，r * http.Request）{
 data：= struct {
消息字符串
} {
  “ Hello，World”，
} 
 
如果err：= json.NewEncoder（w）.Encode（data）;  err！= nil {
 log.Println（err）
} 
} 
   
 
 
和角度飞镖代码： 
 
 <  pre>  class AppComponent {
 Hello hello = new Hello（）; 
} 
 
class Hello {
字符串消息； 
 
 Hello（）{
 
 HttpRequest.getString（'/  api / hello'）
 .then（（String content）{
 Map parsedMap = JSON.decode（content）; 
 message = parsedMap [“ Message”]; 
}）
 .catchError（（错误错误 ）{
 print（error.toString（））; 
}）; 
} 
} 
   
 
 
和项目结构： ”输入图像描述
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1条回答 默认 最新

  • dp198879 2016-03-08 13:31
    已采纳

    The tutorial is quite old. You need to switch to HashLocationStrategy (which was the default back then as far as I know).

    See https://angular.io/docs/ts/latest/api/router/HashLocationStrategy-class.html

    Change 

    bootstrap(AppComponent);

    to

    bootstrap(AppComponent, [
  ROUTER_PROVIDERS,
  provide(LocationStrategy, {useClass: HashLocationStrategy})
]);

    You also need to add some additional imports 

    import 'package:angular2/router.dart'
    show
        HashLocationStrategy,
        LocationStrategy,
        ROUTER_PROVIDERS;
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