fix(auth): support for oauth2 relative url (#6546)

* Handle relative urls for oauth authorization

The full URL is computed based on the current selected server
if a relative URL is used as authorizationUrl
or tokenUrl


Co-authored-by: Eliot Berriot <contact@eliotberriot.com>

src/core/oauth2-authorize.js

@@ -1,8 +1,9 @@
+import parseUrl from "url-parse"
 import win from "core/window"
 import Im from "immutable"
 import { btoa, sanitizeUrl, generateCodeVerifier, createCodeChallenge } from "core/utils"
 
-export default function authorize ( { auth, authActions, errActions, configs, authConfigs={} } ) {
+export default function authorize ( { auth, authActions, errActions, configs, authConfigs={}, currentServer } ) {
   let { schema, scopes, name, clientId } = auth
   let flow = schema.get("flow")
   let query = []
@@ -95,7 +96,17 @@ export default function authorize ( { auth, authActions, errActions, configs, au
   }
 
   const authorizationUrl = schema.get("authorizationUrl")
-  const sanitizedAuthorizationUrl = sanitizeUrl(authorizationUrl)
+  let sanitizedAuthorizationUrl
+  if (currentServer) {
+    // OpenAPI 3
+    sanitizedAuthorizationUrl = parseUrl(
+      sanitizeUrl(authorizationUrl),
+      currentServer,
+      true
+    ).toString()
+  } else {
+    sanitizedAuthorizationUrl = sanitizeUrl(authorizationUrl)
+  }
   let url = [sanitizedAuthorizationUrl, query.join("&")].join(authorizationUrl.indexOf("?") === -1 ? "?" : "&")
 
   // pass action authorizeOauth2 and authentication data through window