front_end/panels/network/RequestPreviewView.ts

// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/* eslint-disable @devtools/no-imperative-dom-api */

import '../../ui/legacy/legacy.js';

import * as i18n from '../../core/i18n/i18n.js';
import type * as SDK from '../../core/sdk/sdk.js';
import * as TextUtils from '../../models/text_utils/text_utils.js';
import * as SourceFrame from '../../ui/legacy/components/source_frame/source_frame.js';
import * as UI from '../../ui/legacy/legacy.js';
import * as VisualLogging from '../../ui/visual_logging/visual_logging.js';

import {RequestHTMLView} from './RequestHTMLView.js';
import {SignedExchangeInfoView} from './SignedExchangeInfoView.js';

const UIStrings = {
  /**
   * @description Text in Request Preview View of the Network panel
   */
  failedToLoadResponseData: 'Failed to load response data',
  /**
   * @description Text in Request Preview View of the Network panel
   */
  previewNotAvailable: 'Preview not available',
} as const;
const str_ = i18n.i18n.registerUIStrings('panels/network/RequestPreviewView.ts', UIStrings);
const i18nString = i18n.i18n.getLocalizedString.bind(undefined, str_);
export class RequestPreviewView extends UI.Widget.VBox {
  request: SDK.NetworkRequest.NetworkRequest;
  private contentViewPromise: Promise<UI.Widget.Widget>|null;

  constructor(request: SDK.NetworkRequest.NetworkRequest) {
    super({jslog: `${VisualLogging.pane('preview').track({resize: true})}`});
    this.element.classList.add('request-view');
    this.request = request;
    this.contentViewPromise = null;
  }

  async showPreview(): Promise<UI.Widget.Widget> {
    const view = await this.createPreview();
    view.show(this.element);
    await view.updateComplete;
    if (!(view instanceof UI.View.SimpleView)) {
      return view;
    }
    const toolbar = this.element.createChild('devtools-toolbar', 'network-item-preview-toolbar');
    void view.toolbarItems().then(items => {
      items.map(item => toolbar.appendToolbarItem(item));
    });
    return view;
  }

  override wasShown(): void {
    super.wasShown();
    void this.doShowPreview();
  }

  private doShowPreview(): Promise<UI.Widget.Widget> {
    if (!this.contentViewPromise) {
      this.contentViewPromise = this.showPreview();
    }
    return this.contentViewPromise;
  }

  private async htmlPreview(): Promise<UI.Widget.Widget|null> {
    const contentData = await this.request.requestContentData();
    if (TextUtils.ContentData.ContentData.isError(contentData)) {
      return new UI.EmptyWidget.EmptyWidget(i18nString(UIStrings.failedToLoadResponseData), contentData.error);
    }

    const allowlist = new Set<string>(['text/html', 'text/plain', 'application/xhtml+xml']);
    if (!allowlist.has(this.request.mimeType)) {
      return null;
    }

    // http://crbug.com/767393 - DevTools should recognize JSON regardless of the content type
    const jsonView = await SourceFrame.JSONView.JSONView.createView(contentData.text);
    if (jsonView) {
      return jsonView;
    }

    return RequestHTMLView.create(contentData);
  }

  async createPreview(): Promise<UI.Widget.Widget> {
    if (this.request.signedExchangeInfo()) {
      return new SignedExchangeInfoView(this.request);
    }

    const htmlErrorPreview = await this.htmlPreview();
    if (htmlErrorPreview) {
      return htmlErrorPreview;
    }

    const provided = await SourceFrame.PreviewFactory.PreviewFactory.createPreview(this.request, this.request.mimeType);
    if (provided) {
      return provided;
    }

    return new UI.EmptyWidget.EmptyWidget(i18nString(UIStrings.previewNotAvailable), '');
  }
}