Azure App Service上的Angular App-从Assets文件夹加载配置文件时出现404错误 [英] Angular app on azure app service - 404 errors when loading config file from assets folder

问题描述

我正在尝试在azure应用服务平台(Windows机器)上部署一个angular 6应用.该应用程序本身只是一个新的角度应用程序(由ng new appname生成的基本代码).我在本教程之后添加了一些次要代码，以使用配置文件并在vsts发布管道中利用变量替换-

I am trying to deploy an angular 6 app on azure app service platform (windows machine). The app itself is just a new angular app (basic code generated from ng new appname). I have added some minor code following this tutorial in order to use a config file and leverage variable substitution in vsts release pipelines - manage settings for an angular app with vsts.

这些是我对生成的应用程序进行的代码更改. 在app.module.ts

These are the code changes I have made to the generated app. In app.module.ts

export function initializeAppSettings(appSettings: AppSettings) {
  return () => appSettings.load();
}

...

providers: [AppSettings, {
    provide: APP_INITIALIZER,
    useFactory: initializeAppSettings,
    deps: [AppSettings],
    multi: true
  }]

对于我的appsettings.ts文件

For my appsettings.ts file

export interface AppConfiguration {
  apiUrl: string;
}

@Injectable()
export class AppSettings {
  static config: AppConfiguration;

  constructor(private http: HttpClient) {}

  load(): Promise<any> {
    const appSettingsJson = environment.production ? 'assets/appsettings.json' : 'assets/appsettings.local.json';
    return new Promise<any>(((resolve, reject) => {
      this.http.get<AppConfiguration>(appSettingsJson)
        .toPromise()
        .then(result => {
          AppSettings.config = result;
          resolve();
        }).catch(reason => {
          reject(`unable to load settings file ${appSettingsJson} due to ${JSON.stringify(reason)}`);
      });
    }));
  }
}

在我的angular.json文件中

In my angular.json file I have

"assets": [
              "src/favicon.ico",
              "src/assets",
              "src/web.config"
            ]

以及以下web.config文件

And the following web.config file

<configuration>
  <system.webServer>
    <rewrite>
      <rules>
        <rule name="Angular" stopProcessing="true">
          <match url=".*" />
          <conditions logicalGrouping="MatchAll">
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
          </conditions>
          <action type="Rewrite" url="/" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>

我在src/assets/appsettings.json文件atm中有一个设置

I have a single setting in my src/assets/appsettings.json file atm

{
  "apiUrl": "https://localhost:5001/api/"
}

当使用ng serve在本地运行，甚至使用ng build部署到本地IIS时，此设置都可以很好地工作.我使用app.component.ts和app.component.html中已加载的设置来验证它是否正确加载.但是，当我将应用程序部署到天蓝色时，会出现404错误.

This setup works completely fine when running locally using ng serve or even deployed to local IIS using ng build. I use the loaded settings in my app.component.ts and app.component.html to verify that it loads correctly. But when I deploy the app to azure I get a 404 error.

由于无法加载设置文件asset/appsettings.local.json而导致的错误 到 {"headers":{"normalizedNames":{}，"lazyUpdate":null}，"status":404，"statusText":"Not 找到，" url:" https://mydomain/assets/appsettings.local.json ，" ok:false，"名称:" HttpErrorResponse，"消息:" Http https://mydomain/assets/appsettings.local.json 的失败响应: 404 Not Found，"错误:"您正在寻找的资源已经 删除，更名或暂时不可用.}

ERROR unable to load settings file assets/appsettings.local.json due to {"headers":{"normalizedNames":{},"lazyUpdate":null},"status":404,"statusText":"Not Found","url":"https://mydomain/assets/appsettings.local.json","ok":false,"name":"HttpErrorResponse","message":"Http failure response for https://mydomain/assets/appsettings.local.json: 404 Not Found","error":"The resource you are looking for has been removed, had its name changed, or is temporarily unavailable."}

我尝试将各个appsettings.json文件显式添加到angular.json中的资产数组，并且尝试使用web.config文件(不带web.config文件).如果我仅将基本的角度应用程序部署到Azure(即无需额外的代码来加载appsettings.json文件)，它就可以工作(甚至没有web.config文件).我对angular(和一般而言的Web开发)还很陌生，已经在我能找到的所有地方进行了搜索，但是到目前为止，还没有任何解决方案.

I have tried explicitly adding the individual appsettings.json file to my assets array in angular.json and have also tried with and without a web.config file. If I deploy just a basic angular app to azure (i.e. without the additional code to load the appsettings.json file) it works (even without a web.config file). I am pretty new to angular (and web development in general) and have searched everywhere I could for a solution but nothing has fixed it so far.

推荐答案

每个@Martin Brandl注释都可以在我的web.config文件中添加以下内容.谢谢.

Per @Martin Brandl comment adding the following to my web.config file did the trick. Thanks.

<staticContent><mimeMap fileExtension=".json" mimeType="application/json" /></staticContent>

这篇关于Azure App Service上的Angular App-从Assets文件夹加载配置文件时出现404错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！