Angular 6 + Spring Boot。 在地址栏中没有index.html的应用程序外观错误

Question

请告诉我为什么会出现以下问题：组装应用程序后，此窗口将出现在浏览器中。 如果在地址栏中添加index.html ，则应用程序将正确加载。但是，当您尝试刷新该页面时，将出现Whitelabel Error Page。 除了angular.json和tconfig.json的内容（如果您需要显示其他内容，请告诉我），我不知道该显示什么。 谢谢大家。

angular.json

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "asterisk-prime-ui": {
      "root": "",
      "sourceRoot": "src",
      "projectType": "application",
      "prefix": "app",
      "schematics": {},
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "../../../../asterisk-prime/src/main/resources/static/asterisk-prime-ui",
            "index": "src/index.html",
            "main": "src/main.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.app.json",
            "assets": [
              {
                "glob": "**/*",
                "input": "src/assets",
                "output": "/assets"
              },
              {
                "glob": "favicon.ico",
                "input": "src",
                "output": "/"
              }
            ],
            "styles": [
              {
                "input": "node_modules/@angular/material/prebuilt-themes/indigo-pink.css"
              },
              {
                "input": "src/styles/global.scss"
              }
            ],
            "scripts": []
          },
          "configurations": {
            "production": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.prod.ts"
                }
              ],
              "optimization": true,
              "outputHashing": "all",
              "sourceMap": false,
              "extractCss": true,
              "namedChunks": false,
              "aot": true,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "asterisk-prime-ui:build"
          },
          "configurations": {
            "production": {
              "browserTarget": "asterisk-prime-ui:build:production"
            }
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
            "browserTarget": "asterisk-prime-ui:build"
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.spec.json",
            "karmaConfig": "src/karma.conf.js",
            "styles": [
              {
                "input": "node_modules/@angular/material/prebuilt-themes/indigo-pink.css"
              },
              {
                "input": "src/styles/global.scss"
              }
            ],
            "scripts": [],
            "assets": [
              {
                "glob": "**/*",
                "input": "src/assets",
                "output": "/assets"
              },
              {
                "glob": "favicon.ico",
                "input": "src",
                "output": "/"
              }
            ]
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "src/tsconfig.app.json",
              "src/tsconfig.spec.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    },
    "asterisk-prime-ui-e2e": {
      "root": "e2e/",
      "projectType": "application",
      "architect": {
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "e2e/protractor.conf.js",
            "devServerTarget": "asterisk-prime-ui:serve"
          },
          "configurations": {
            "production": {
              "devServerTarget": "asterisk-prime-ui:serve:production"
            }
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": "e2e/tsconfig.e2e.json",
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    }
  },
  "defaultProject": "asterisk-prime-ui",
  "schematics": {
    "@schematics/angular:component": {
      "styleext": "scss"
    }
  }
}

tsconfig.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "outDir": "./dist/out-tsc",
    "baseUrl": "/",
    "target": "es5",
    "module": "es2015",
    "moduleResolution": "node",
    "sourceMap": true,
    "declaration": false,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [
      "es6",
      "es7",
      "dom"
    ],
    "typeRoots": [
      "node_modules/@types"
    ]
  },
  "exclude": [
    "../../node_modules"
  ]
}

另外，如果您添加到地址栏.../index.html ，则工作时会出现错误

core.js.pre-build-optimizer.js:1673 ERROR Error: Uncaught (in promise): Error: Loading chunk modules-devices-devices-module-ngfactory failed.
(error: http://localhost:8080/asterisk_prime/modules-devices-devices-module-ngfactory.js)
Error: Loading chunk modules-devices-devices-module-ngfactory failed.
(error: http://localhost:8080/asterisk_prime/modules-devices-devices-module-ngfactory.js)
    at HTMLScriptElement.onScriptComplete (bootstrap:134)
    at HTMLScriptElement.wrapFn (zone.js.pre-build-optimizer.js:1332)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js.pre-build-optimizer.js:423)
    at Object.onInvokeTask (core.js.pre-build-optimizer.js:3815)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js.pre-build-optimizer.js:422)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js.pre-build-optimizer.js:195)
    at ZoneTask.push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask [as invoke] (zone.js.pre-build-optimizer.js:498)
    at invokeTask (zone.js.pre-build-optimizer.js:1744)
    at HTMLScriptElement.globalZoneAwareCallback (zone.js.pre-build-optimizer.js:1770)
    at resolvePromise (zone.js.pre-build-optimizer.js:831)
    at resolvePromise (zone.js.pre-build-optimizer.js:788)
    at zone.js.pre-build-optimizer.js:892
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js.pre-build-optimizer.js:423)
    at Object.onInvokeTask (core.js.pre-build-optimizer.js:3815)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js.pre-build-optimizer.js:422)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js.pre-build-optimizer.js:195)
    at drainMicroTaskQueue (zone.js.pre-build-optimizer.js:601)
    at ZoneTask.push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask [as invoke] (zone.js.pre-build-optimizer.js:502)
    at invokeTask (zone.js.pre-build-optimizer.js:1744)

更新

补充说明：Angular应用程序以汇编形式用作Spring Boot后端的静态资源。 该应用程序本身收集在war文件中，并部署到服务器。

Answer 1

该决定要求后端（Spring Boot）和前端（Angular 6）都需要更改。

1.后端

在Spring Boot部分中，进行了所有更改以调整WebMvc设置。 特别是更改了ViewResolver ：

@Bean
public ViewResolver internalResourceViewResolver()
{
    InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
    viewResolver.setViewClass(InternalResourceView.class);
    return viewResolver;
}

并在映射/时在index.html添加了一个“翻转”功能（事实证明，这是使用单页应用程序（使用Angular，React或类似工具）时的标准机制：

@Override
public void addViewControllers(ViewControllerRegistry registry)
{
    registry.addViewController("/").setViewName("index.html");
}

最终配置视图：

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = {"com.prime.asterisk.web.controller"})
public class WebMvcConfig implements WebMvcConfigurer
{
    @Value("#{'${web.mvc.crossOrigins}'.split(',')}")
    private String[] crossOrigins;

    private static final String[] CLASSPATH_RESOURCE_LOCATIONS = {
            "classpath:/META-INF/resources/",
            "classpath:/resources/",
            "classpath:/static/",
            "classpath:/public/",
            "classpath:/static/asterisk-prime-ui/"
    };

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry)
    {
        if (!registry.hasMappingForPattern("/**"))
        {
            registry.addResourceHandler("/**")
                    .addResourceLocations(CLASSPATH_RESOURCE_LOCATIONS);
        }
    }

    @Override
    public void addCorsMappings(CorsRegistry registry)
    {
        registry.addMapping("/api/**")
                .allowedOrigins(crossOrigins)
                .allowCredentials(true)
                .maxAge(3600);
    }

    @Override
    public void addViewControllers(ViewControllerRegistry registry)
    {
        registry.addViewController("/").setViewName("index.html");
    }

    @Bean
    public ViewResolver internalResourceViewResolver()
    {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(InternalResourceView.class);
        return viewResolver;
    }
}

2.前端

在用户界面的一部分中，也有必要进行编辑。

首先，为构建脚本添加base-href和deploy-url属性。 在我的情况下，使用的模板是： /<application-context>/ ，其中<application-context>是asterisk-prime （对于我而言）。 通常，在大多数情况下，放置base-href属性就足够了，但是在我的情况下，这还不够，因为项目资产没有将base-href用作src属性的前缀。 也许还有另一种解决方案，但就我而言，添加属性deploy-url就足够了。 脚本的最终视图：

...
"build-prod": "ng build --prod --base-href /asterisk-prime/ --deploy-url /asterisk-prime/",
...
"build-dev": "ng build --aot --build-optimizer --base-href /asterisk-prime/ --deploy-url /asterisk-prime/",
...

AppConfigRoutesFactory一个带有静态方法返回路由的类（只需在此处传递您的路由）

AppRoutesModule的最终视图：

@NgModule({
  imports: [
    RouterModule.forRoot(AppConfigRoutesFactory.getRoutes(),
      {
        useHash: true,
        scrollPositionRestoration: 'enabled'
      })
  ],
  exports: [
    RouterModule
  ]
})

export class AppRoutingModule {
}

然后，您只需要将此模块导入到AppModule中即可。 如果刷新页面时出现Whitelabel Error Page错误，则应在路由中使用哈希。

非常感谢您提供的所有帮助，提出的评论和尝试，至少可以帮助您发现问题。