Angular 角度模板上的.NET core 2.1 base href标记

Angular 角度模板上的.NET core 2.1 base href标记,angular,single-page-application,asp.net-core-2.1,Angular,Single Page Application,Asp.net Core 2.1,我正在为我们的团队构建一个模板,该模板位于最新版本Core 2.1中包含的.NET Core 2.1+Angular 5模板之上,我们将应用程序部署到虚拟文件夹中,例如/it/myapp或/aa/myotherapp 在2.0模板上,base href属性将自动设置,我假设是因为它是用razor构建的,如下所示: <base href="~/" /> 但是,对于2.1模板来说,情况并非如此,我假设这是因为该模板实际上只使用静态文件,而使用了新的app.UseSpa() 关于如何

我正在为我们的团队构建一个模板,该模板位于最新版本Core 2.1中包含的.NET Core 2.1+Angular 5模板之上,我们将应用程序部署到虚拟文件夹中,例如/it/myapp或/aa/myotherapp

在2.0模板上,base href属性将自动设置,我假设是因为它是用razor构建的,如下所示:

<base href="~/" />

但是,对于2.1模板来说,情况并非如此,我假设这是因为该模板实际上只使用静态文件,而使用了新的app.UseSpa()

关于如何自动填充base href标记,有什么想法吗


谢谢

是的,我知道这是一个老问题,但我希望这对其他人有更多帮助。答案是关于Angular 6和.NET Core 2.1。建议:解释有点大(对不起)

在Core2.1中,我们有一个典型的Startup.cs

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseExceptionHandler("/Error");
        app.UseHsts();
     }
     app.UseHttpsRedirection();
     app.UseStaticFiles();
     app.UseMvc(routes =>
     {
          routes.MapRoute(
          name: "default",
          template: "{controller}/{action=Index}/{id?}");
      });
      app.UseSpa(spa =>
      {
           // To learn more about options for serving an Angular SPA from ASP.NET Core,
           // see https://go.microsoft.com/fwlink/?linkid=864501

           spa.Options.SourcePath = "ClientApp";
           spa.Options.DefaultPage = $"/index.html";

           if (env.IsDevelopment())
           {
               spa.UseAngularCliServer(npmScript: "start");
           }
      });
  }
重要的部分是

   spa.UseAngularCliServer(npmScript: "start");
这将告诉.NET使用package.json中定义的脚本

{
  "name": "client-app",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve --base-href=/ --serve-path=/", //<--this line
    "build": "ng build",
     ...
  },
  ....
}
查看如何将this.\u options.baseHref添加到脚本中 实际上,在构造函数中我们没有baseHref,这是因为我们必须更改browser.js文件 在

还有一步。当我们在index.html中使用javascript编写基本标记时,我们不希望添加此标记。为此,我们必须更改的唯一一件事是对index-html-webpack-plugin.js中的行进行注释

class IndexHtmlWebpackPlugin {
    constructor(options) {
        this._options = Object.assign({ input: 'index.html', output: 'index.html', entrypoints: ['polyfills', 'main'], sri: false }, options);
    }
    apply(compiler) {
      ....
        const scriptElements = treeAdapter.createDocumentFragment();
        for (const script of scripts) {
            const attrs = [
                { name: 'type', value: 'text/javascript' },
                //change the line
                //{ name: 'src', value: (this._options.deployUrl || '') + script },
                //by 
                { name: 'src', value: (this._options.baseHref)+(this._options.deployUrl || '') + script },
            ];
            if (this._options.sri) {
                const content = compilation.assets[script].source();
                attrs.push(...this._generateSriAttributes(content));
            }
            const element = treeAdapter.createElement('script', undefined, attrs);
            treeAdapter.appendChild(scriptElements, element);
        }
// Adjust base href if specified
if (typeof this._options.baseHref == 'string') {
    let baseElement;
    for (const headChild of headElement.childNodes) {
        if (headChild.tagName === 'base') {
            baseElement = headChild;
        }
    }
    const baseFragment = treeAdapter.createDocumentFragment();
    if (!baseElement) {
        baseElement = treeAdapter.createElement('base', undefined, [
            { name: 'href', value: this._options.baseHref },
        ]);
//coment the two lines below
//        treeAdapter.appendChild(baseFragment, baseElement);
//        indexSource.insert(headElement.__location.startTag.endOffset + 1, parse5.serialize(baseFragment, { treeAdapter }));
    }
就这些

还有两个有趣的问题

当我们使用javascript创建base标记时,我们需要调整base。否则,如果我们刷新页面,我们的基本href会改变,如果我们在主页上,我们的url将类似于http://www.dominio.com///home。我们希望基地继续前进。看一看剧本,然后像你想要的那样

  <script>
    var items = document.location.href.split('/');
    while (items.length>4)
      items.pop();
    document.write('<base href="' + items.join('/') + '" />');
  </script>
更新

使用java脚本添加选项卡库这是一个非常糟糕的解决方法。更好地使用基本参考提供程序

import {Component, NgModule} from '@angular/core';
import {APP_BASE_HREF} from '@angular/common';

@NgModule({
  providers: [{provide: APP_BASE_HREF, useValue: '/my/app'}]
})
class AppModule {}

npmi
之后更改node_模块中的网页文件听起来不是个好主意。非常肮脏和脆弱的黑客,它将在下一个
npmi
中被覆盖,并且在源代码管理中不可持久
plugins: extraPlugins.concat([
    new index_html_webpack_plugin_1.IndexHtmlWebpackPlugin({
        input: path.resolve(root, buildOptions.index),
        output: path.basename(buildOptions.index),
        baseHref: buildOptions.baseHref,
        entrypoints: package_chunk_sort_1.generateEntryPoints(buildOptions),
        deployUrl: buildOptions.deployUrl,
        //we add this line
        servePath: buildOptions.servePath,
        sri: buildOptions.subresourceIntegrity,
    }),
]),
// Adjust base href if specified
if (typeof this._options.baseHref == 'string') {
    let baseElement;
    for (const headChild of headElement.childNodes) {
        if (headChild.tagName === 'base') {
            baseElement = headChild;
        }
    }
    const baseFragment = treeAdapter.createDocumentFragment();
    if (!baseElement) {
        baseElement = treeAdapter.createElement('base', undefined, [
            { name: 'href', value: this._options.baseHref },
        ]);
//coment the two lines below
//        treeAdapter.appendChild(baseFragment, baseElement);
//        indexSource.insert(headElement.__location.startTag.endOffset + 1, parse5.serialize(baseFragment, { treeAdapter }));
    }
  <script>
    var items = document.location.href.split('/');
    while (items.length>4)
      items.pop();
    document.write('<base href="' + items.join('/') + '" />');
  </script>
   app.UseMvc(routes =>
   {
    ...
    });
   //Add this Middleware
    app.Use(async (context, next) =>
    {
        string path = context.Request.Path.Value.Substring(1);
        bool encontrado = path.EndsWith(".js") || path.EndsWith(".css") || path.EndsWith(".map") || path.StartsWith("sockjs");
        if (!encontrado)
        {
            //make here the check for the pages
            //"silly" e.g.
            encontrado==(path=="es/adminitrator" || path=="it/administrator")
        }
        if (encontrado)
            await next.Invoke();
        else
        {
            context.Response.ContentType = "text/html";
            await context.Response.SendFileAsync(Path.Combine(env.WebRootPath, "error404.html"));
        }
        app.UseSpa(spa=>
        {
              ....
        }
    });
import {Component, NgModule} from '@angular/core';
import {APP_BASE_HREF} from '@angular/common';

@NgModule({
  providers: [{provide: APP_BASE_HREF, useValue: '/my/app'}]
})
class AppModule {}