feat(xen-api): configurable transport

Related to zammad#14008

Possible value for the `transport` setting: `auto`, `json-rpc`, `xml-rpc`.

packages/xen-api/src/index.js

@@ -13,7 +13,6 @@ import { Index } from 'xo-collection/index'
 import { cancelable, defer, fromCallback, ignoreErrors, pDelay, pRetry, pTimeout } from 'promise-toolbox'
 import { limitConcurrency } from 'limit-concurrency-decorator'
 
-import autoTransport from './transports/auto'
 import debug from './_debug'
 import getTaskResult from './_getTaskResult'
 import isGetAllRecordsMethod from './_isGetAllRecordsMethod'
@@ -22,6 +21,7 @@ import makeCallSetting from './_makeCallSetting'
 import parseUrl from './_parseUrl'
 import Ref from './_Ref'
 import replaceSensitiveValues from './_replaceSensitiveValues'
+import transports from './transports'
 
 // ===================================================================
 
@@ -90,6 +90,13 @@ export class Xapi extends EventEmitter {
   constructor(opts) {
     super()
 
+    const { transport = 'auto' } = opts
+    const createTransport = transports[transport]
+    if (createTransport === undefined) {
+      throw new Error('invalid transport: ' + transport)
+    }
+    this._createTransport = createTransport
+
     this._addSyncStackTrace =
       opts.syncStackTraces ?? process.env.NODE_ENV === 'development' ? addSyncStackTrace : identity
     this._callTimeout = makeCallSetting(opts.callTimeout, 60 * 60 * 1e3) // 1 hour but will be reduced in the future
@@ -939,7 +946,7 @@ export class Xapi extends EventEmitter {
 
   _setUrl(url) {
     this._humanId = `${this._auth.user ?? 'unknown'}@${url.hostname}`
-    this._transport = autoTransport({
+    this._transport = this._createTransport({
       secureOptions: {
         minVersion: 'TLSv1',
         rejectUnauthorized: !this._allowUnauthorized,

packages/xen-api/src/transports/index.js

@@ -0,0 +1,11 @@
+import auto from './auto.js'
+import jsonRpc from './json-rpc.js'
+import xmlRpc from './xml-rpc.js'
+
+export default {
+  __proto__: null,
+
+  auto,
+  'json-rpc': jsonRpc,
+  'xml-rpc': xmlRpc,
+}