Expose serverBasePath on client-side (#58070)

Author: joshdover

docs/development/core/public/kibana-plugin-public.ibasepath.md

@@ -19,4 +19,5 @@ export interface IBasePath
 |  [get](./kibana-plugin-public.ibasepath.get.md) | <code>() =&gt; string</code> | Gets the <code>basePath</code> string. |
 |  [prepend](./kibana-plugin-public.ibasepath.prepend.md) | <code>(url: string) =&gt; string</code> | Prepends <code>path</code> with the basePath. |
 |  [remove](./kibana-plugin-public.ibasepath.remove.md) | <code>(url: string) =&gt; string</code> | Removes the prepended basePath from the <code>path</code>. |
+|  [serverBasePath](./kibana-plugin-public.ibasepath.serverbasepath.md) | <code>string</code> | Returns the server's root basePath as configured, without any namespace prefix.<!-- -->See  for getting the basePath value for a specific request |
 

docs/development/core/public/kibana-plugin-public.ibasepath.serverbasepath.md

@@ -0,0 +1,15 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-public](./kibana-plugin-public.md) &gt; [IBasePath](./kibana-plugin-public.ibasepath.md) &gt; [serverBasePath](./kibana-plugin-public.ibasepath.serverbasepath.md)
+
+## IBasePath.serverBasePath property
+
+Returns the server's root basePath as configured, without any namespace prefix.
+
+See  for getting the basePath value for a specific request
+
+<b>Signature:</b>
+
+```typescript
+readonly serverBasePath: string;
+```

src/core/public/http/base_path.test.ts

@@ -88,4 +88,14 @@ describe('BasePath', () => {
       });
     });
   });
+
+  describe('serverBasePath', () => {
+    it('defaults to basePath', () => {
+      expect(new BasePath('/foo/bar').serverBasePath).toEqual('/foo/bar');
+    });
+
+    it('returns value when passed into constructor', () => {
+      expect(new BasePath('/foo/bar', '/foo').serverBasePath).toEqual('/foo');
+    });
+  });
 });

src/core/public/http/base_path.ts

@@ -38,7 +38,10 @@
 import { modifyUrl } from '../../utils';
 
 export class BasePath {
-  constructor(private readonly basePath: string = '') {}
+  constructor(
+    private readonly basePath: string = '',
+    public readonly serverBasePath: string = basePath
+  ) {}
 
   public get = () => {
     return this.basePath;

src/core/public/http/http_service.ts

@@ -39,7 +39,10 @@ export class HttpService implements CoreService<HttpSetup, HttpStart> {
 
   public setup({ injectedMetadata, fatalErrors }: HttpDeps): HttpSetup {
     const kibanaVersion = injectedMetadata.getKibanaVersion();
-    const basePath = new BasePath(injectedMetadata.getBasePath());
+    const basePath = new BasePath(
+      injectedMetadata.getBasePath(),
+      injectedMetadata.getServerBasePath()
+    );
     const fetchService = new Fetch({ basePath, kibanaVersion });
     const loadingCount = this.loadingCount.setup({ fatalErrors });
 

src/core/public/http/types.ts

@@ -94,6 +94,13 @@ export interface IBasePath {
    * Removes the prepended basePath from the `path`.
    */
   remove: (url: string) => string;
+
+  /**
+   * Returns the server's root basePath as configured, without any namespace prefix.
+   *
+   * See {@link BasePath.get} for getting the basePath value for a specific request
+   */
+  readonly serverBasePath: string;
 }
 
 /**

src/core/public/injected_metadata/injected_metadata_service.mock.ts

@@ -21,6 +21,7 @@ import { InjectedMetadataService, InjectedMetadataSetup } from './injected_metad
 const createSetupContractMock = () => {
   const setupContract: jest.Mocked<InjectedMetadataSetup> = {
     getBasePath: jest.fn(),
+    getServerBasePath: jest.fn(),
     getKibanaVersion: jest.fn(),
     getKibanaBranch: jest.fn(),
     getCspConfig: jest.fn(),

src/core/public/injected_metadata/injected_metadata_service.ts

@@ -54,6 +54,7 @@ export interface InjectedMetadataParams {
     buildNumber: number;
     branch: string;
     basePath: string;
+    serverBasePath: string;
     category?: AppCategory;
     csp: {
       warnLegacyBrowsers: boolean;
@@ -115,6 +116,10 @@ export class InjectedMetadataService {
         return this.state.basePath;
       },
 
+      getServerBasePath: () => {
+        return this.state.serverBasePath;
+      },
+
       getKibanaVersion: () => {
         return this.state.version;
       },
@@ -161,6 +166,7 @@ export class InjectedMetadataService {
  */
 export interface InjectedMetadataSetup {
   getBasePath: () => string;
+  getServerBasePath: () => string;
   getKibanaBuildNumber: () => number;
   getKibanaBranch: () => string;
   getKibanaVersion: () => string;

src/core/public/public.api.md

@@ -718,6 +718,8 @@ export interface IBasePath {
     get: () => string;
     prepend: (url: string) => string;
     remove: (url: string) => string;
+    // Warning: (ae-unresolved-link) The @link reference could not be resolved: The package "kibana" does not have an export "BasePath"
+    readonly serverBasePath: string;
 }
 
 // @public