Move redirect calculation to Spec object

Author: yuvipanda

binderhub/static/js/components/BuilderLauncher.jsx

@@ -6,18 +6,6 @@ import "xterm/css/xterm.css";
 import { Progress, PROGRESS_STATES } from "./Progress.jsx";
 import { Spec } from "../spec.js";
 
-/**
- *
- * @param {string} serverUrl
- * @param {string} token
- * @param {string} urlPath
- */
-function redirectToRunningServer(serverUrl, token, urlPath) {
-  const redirectUrl = new URL(urlPath, serverUrl);
-  redirectUrl.searchParams.append("token", token);
-  window.location.href = redirectUrl.toString();
-}
-
 /**
  *
  * @param {URL} baseUrl
@@ -64,7 +52,11 @@ async function buildImage(
       case "ready": {
         setProgressState(PROGRESS_STATES.SUCCESS);
         image.close();
-        redirectToRunningServer(data.url, data.token, spec.launchSpec.urlPath);
+        const serverUrl = new URL(data.url);
+        window.location.href = spec.launchSpec.getJupyterServerRedirectUrl(
+          serverUrl,
+          data.token,
+        );
         console.log(data);
         break;
       }

binderhub/static/js/spec.js

@@ -9,6 +9,20 @@ export class LaunchSpec {
     this.urlPath = this.urlPath.replace(/^\/*/, "");
   }
 
+  /**
+   * Return a URL to redirect user to for use with this launch specification
+   *
+   * @param {URL} serverUrl Fully qualified URL to a running Jupyter Server
+   * @param {string} token Authentication token to pass to the Jupyter Server
+   *
+   * @returns {URL}
+   */
+  getJupyterServerRedirectUrl(serverUrl, token) {
+    const redirectUrl = new URL(this.urlPath, serverUrl);
+    redirectUrl.searchParams.append("token", token);
+    return redirectUrl;
+  }
+
   /**
    * Create a LaunchSpec from given query parameters in the URL
    *