[Console] Move out of legacy + migrate server side to New Platform (#…

…55690) (#56360)

* Initial move of public and setup of server skeleton

* Fix public paths and types

* Use new usage stats dependency directly in tracker also mark as an optional dependency

* WiP on getting server side working

* Restore proxy route behaviour for base case, still need to test custom proxy and SSL

* Add new type and lib files

* Clean up legacy start up code and add comment about issue in kibana.yml config for console

* Move console_extensions to new platform and introduce ConsoleSetup API for extending autocomplete
Add TODO regarding exposing legacy ES config

* Re-introduce injected elasticsearch variable and use it in public

* Don't pass stateSetter prop through to checkbox

* Refactor of proxy route (split into separate files). Easier testing for now.
Refactor file name of request.ts -> proxy_request.ts. This is consistent with the exported function now
Started fixing server side tests for the proxy route
  - Migrated away from sinon
  - Completed the body.js -> body.test.ts. Still have to do the rest

* headers.js test -> headers.test.ts and moved some of the proxy route mocking logic to a common space

* Finish migration of rest of proxy route test away from hapi
Add test for custom route validation

* Bring console application in line with https://github.com/elastic/kibana/blob/master/src/core/CONVENTIONS.md#applications
Change log from info level to debug level for console_extensions plugin

* Update i18nrc file for console

* Add setHeaders when passing back error response

Co-authored-by: Elastic Machine <[email protected]>

# Conflicts:
#	.github/CODEOWNERS
#	src/legacy/core_plugins/console/server/__tests__/proxy_route/params.js
#	src/legacy/core_plugins/console/server/__tests__/proxy_route/query_string.js
#	src/plugins/console/server/lib/spec_definitions/spec/generated/get_script_context.json
#	x-pack/plugins/console_extensions/server/spec/overrides/security.delete_privileges.json
#	x-pack/plugins/console_extensions/server/spec/overrides/security.put_privileges.json

.i18nrc.json

@@ -1,7 +1,7 @@
 {
   "paths": {
     "common.ui": "src/legacy/ui",
-    "console": "src/legacy/core_plugins/console",
+    "console": "src/plugins/console",
     "core": "src/core",
     "dashboardEmbeddableContainer": "src/plugins/dashboard_embeddable_container",
     "data": [

src/core/server/http/router/response_adapter.ts

@@ -19,6 +19,7 @@
 import { ResponseObject as HapiResponseObject, ResponseToolkit as HapiResponseToolkit } from 'hapi';
 import typeDetect from 'type-detect';
 import Boom from 'boom';
+import * as stream from 'stream';
 
 import {
   HttpResponsePayload,
@@ -112,8 +113,18 @@ export class HapiResponseAdapter {
     return response;
   }
 
-  private toError(kibanaResponse: KibanaResponse<ResponseError>) {
+  private toError(kibanaResponse: KibanaResponse<ResponseError | Buffer | stream.Readable>) {
     const { payload } = kibanaResponse;
+
+    // Special case for when we are proxying requests and want to enable streaming back error responses opaquely.
+    if (Buffer.isBuffer(payload) || payload instanceof stream.Readable) {
+      const response = this.responseToolkit
+        .response(kibanaResponse.payload)
+        .code(kibanaResponse.status);
+      setHeaders(response, kibanaResponse.options.headers);
+      return response;
+    }
+
     // we use for BWC with Boom payload for error responses - {error: string, message: string, statusCode: string}
     const error = new Boom('', {
       statusCode: kibanaResponse.status,