TypeScript URLExt.objectToQueryString方法代碼示例

      execute: (args: IRouter.ILocation) => {
        const { hash, path, search } = args;
        const query = URLExt.queryStringToObject(search || '');
        const reset = 'reset' in query;

        if (!reset) {
          return;
        }

        // If the state database has already been resolved, resetting is
        // impossible without reloading.
        if (resolved) {
          return document.location.reload();
        }

        // Empty the state database.
        resolved = true;
        transform.resolve({ type: 'clear', contents: null });

        // Maintain the query string parameters but remove `reset`.
        delete query['reset'];

        const url = path + URLExt.objectToQueryString(query) + hash;
        const cleared = commands.execute(CommandIDs.recoverState)
          .then(() => router.stop); // Stop routing before new route navigation.

        // After the state has been reset, navigate to the URL.
        cleared.then(() => { router.navigate(url, { silent: true }); });

        return cleared;
      }

 it('should return a serialized object string suitable for a query', () => {
   const obj = {
     name: 'foo',
     id: 'baz'
   };
   expect(URLExt.objectToQueryString(obj)).to.equal('?name=foo&id=baz');
 });

  activate: async (
    _: JupyterFrontEnd,
    paths: JupyterFrontEnd.IPaths,
    router: IRouter
  ) => {
    const { hash, path, search } = router.current;
    const query = URLExt.queryStringToObject(search || '');
    const solver = new WindowResolver();
    const match = path.match(new RegExp(`^${paths.urls.workspaces}([^?\/]+)`));
    const workspace = (match && decodeURIComponent(match[1])) || '';
    const candidate = Private.candidate(paths, workspace);

    try {
      await solver.resolve(candidate);
    } catch (error) {
      // Window resolution has failed so the URL must change. Return a promise
      // that never resolves to prevent the application from loading plugins
      // that rely on `IWindowResolver`.
      return new Promise<IWindowResolver>(() => {
        // If the user has requested workspace resolution create a new one.
        if (WORKSPACE_RESOLVE in query) {
          const { base, workspaces } = paths.urls;
          const pool =
            'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
          const random = pool[Math.floor(Math.random() * pool.length)];
          const path = URLExt.join(base, workspaces, `auto-${random}`);

          // Clone the originally requested workspace after redirecting.
          query['clone'] = workspace;

          // Change the URL and trigger a hard reload to re-route.
          const url = path + URLExt.objectToQueryString(query) + (hash || '');
          router.navigate(url, { hard: true, silent: true });
          return;
        }

        // Launch a dialog to ask the user for a new workspace name.
        console.warn('Window resolution failed:', error);
        return Private.redirect(router, paths, workspace);
      });
    }

    // If the user has requested workspace resolution remove the query param.
    if (WORKSPACE_RESOLVE in query) {
      delete query[WORKSPACE_RESOLVE];

      // Silently scrub the URL.
      const url = path + URLExt.objectToQueryString(query) + (hash || '');
      router.navigate(url, { silent: true });
    }

    return solver;
  }

      return new Promise<IWindowResolver>(() => {
        const { base, workspaces } = paths.urls;
        const pool =
          'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        const random = pool[Math.floor(Math.random() * pool.length)];
        const path = URLExt.join(base, workspaces, `auto-${random}`) + rest;

        // Clone the originally requested workspace after redirecting.
        query['clone'] = workspace;

        // Change the URL and trigger a hard reload to re-route.
        const url = path + URLExt.objectToQueryString(query) + (hash || '');
        router.navigate(url, { hard: true, silent: true });
      });

      execute: (args: IRouter.ILocation) => {
        const { hash, path, search } = args;
        const query = URLExt.queryStringToObject(search || '');
        const reset = 'reset' in query;
        const clone = 'clone' in query;

        if (!reset) {
          return;
        }

        // If a splash provider exists, launch the splash screen.
        const loading = splash
          ? splash.show()
          : new DisposableDelegate(() => undefined);

        // If the state database has already been resolved, resetting is
        // impossible without reloading.
        if (resolved) {
          return router.reload();
        }

        // Empty the state database.
        resolved = true;
        transform.resolve({ type: 'clear', contents: null });

        // Maintain the query string parameters but remove `reset`.
        delete query['reset'];

        const silent = true;
        const hard = true;
        const url = path + URLExt.objectToQueryString(query) + hash;
        const cleared = commands
          .execute(CommandIDs.recoverState)
          .then(() => router.stop); // Stop routing before new route navigation.

        // After the state has been reset, navigate to the URL.
        if (clone) {
          void cleared.then(() => {
            router.navigate(url, { silent, hard });
          });
        } else {
          void cleared.then(() => {
            router.navigate(url, { silent });
            loading.dispose();
          });
        }

        return cleared;
      }

        }).then(() => {
          const immediate = true;

          if (source === clone) {
            // Maintain the query string parameters but remove `clone`.
            delete query['clone'];

            const url = path + URLExt.objectToQueryString(query) + hash;
            const cloned = commands.execute(CommandIDs.saveState, { immediate })
              .then(() => router.stop);

            // After the state has been cloned, navigate to the URL.
            cloned.then(() => { router.navigate(url, { silent: true }); });

            return cloned;
          }

          // After the state database has finished loading, save it.
          return commands.execute(CommandIDs.saveState, { immediate });
        });

      return new Promise<IWindowResolver>(() => {
        // If the user has requested workspace resolution create a new one.
        if (WORKSPACE_RESOLVE in query) {
          const { base, workspaces } = paths.urls;
          const pool =
            'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
          const random = pool[Math.floor(Math.random() * pool.length)];
          const path = URLExt.join(base, workspaces, `auto-${random}`);

          // Clone the originally requested workspace after redirecting.
          query['clone'] = workspace;

          // Change the URL and trigger a hard reload to re-route.
          const url = path + URLExt.objectToQueryString(query) + (hash || '');
          router.navigate(url, { hard: true, silent: true });
          return;
        }

        // Launch a dialog to ask the user for a new workspace name.
        console.warn('Window resolution failed:', error);
        return Private.redirect(router, paths, workspace);
      });

      execute: async (args: IRouter.ILocation) => {
        // Since the command can be executed an arbitrary number of times, make
        // sure it is safe to call multiple times.
        if (resolved) {
          return;
        }

        const { hash, path, search } = args;
        const { defaultWorkspace, workspace } = app.info;
        const query = URLExt.queryStringToObject(search || '');
        const clone =
          typeof query['clone'] === 'string'
            ? query['clone'] === ''
              ? defaultWorkspace
              : URLExt.join(
                  PageConfig.getOption('baseUrl'),
                  PageConfig.getOption('workspacesUrl'),
                  query['clone']
                )
            : null;
        const source = clone || workspace;

        try {
          const saved = await workspaces.fetch(source);

          // If this command is called after a reset, the state database
          // will already be resolved.
          if (!resolved) {
            resolved = true;
            transform.resolve({ type: 'overwrite', contents: saved.data });
          }
        } catch (error) {
          console.warn(`Fetching workspace (${workspace}) failed:`, error);

          // If the workspace does not exist, cancel the data transformation
          // and save a workspace with the current user state data.
          if (!resolved) {
            resolved = true;
            transform.resolve({ type: 'cancel', contents: null });
          }
        }

        // Any time the local state database changes, save the workspace.
        if (workspace) {
          state.changed.connect(
            listener,
            state
          );
        }

        const immediate = true;

        if (source === clone) {
          // Maintain the query string parameters but remove `clone`.
          delete query['clone'];

          const url = path + URLExt.objectToQueryString(query) + hash;
          const cloned = commands
            .execute(CommandIDs.saveState, { immediate })
            .then(() => router.stop);

          // After the state has been cloned, navigate to the URL.
          cloned.then(() => {
            console.log(`HERE: ${url}`);
            router.navigate(url, { silent: true });
          });

          return cloned;
        }

        // After the state database has finished loading, save it.
        return commands.execute(CommandIDs.saveState, { immediate });
      }