[Reporting/Screenshots] Handle page setup errors and capture the page, don't fail the job

docs/settings/reporting-settings.asciidoc

@@ -95,6 +95,8 @@ index for any pending Reporting jobs. Defaults to `3000` (3 seconds).
 [[xpack-reporting-q-timeout]]`xpack.reporting.queue.timeout`::
 How long each worker has to produce a report. If your machine is slow or under
 heavy load, you might need to increase this timeout. Specified in milliseconds.
+If a Reporting job execution time goes over this time limit, the job will be
+marked as a failure and there will not be a download available.
 Defaults to `120000` (two minutes).
 
 [float]
@@ -104,6 +106,26 @@ Defaults to `120000` (two minutes).
 Reporting works by capturing screenshots from Kibana. The following settings
 control the capturing process.
 
+`xpack.reporting.capture.timeouts.openUrl`::
+How long to allow the Reporting browser to wait for the initial data of the
+Kibana page to load. Defaults to `30000` (30 seconds).
+
+`xpack.reporting.capture.timeouts.waitForElements`::
+How long to allow the Reporting browser to wait for the visualization panels to
+load on the Kibana page. Defaults to `30000` (30 seconds).
+
+`xpack.reporting.capture.timeouts.renderComplete`::
+How long to allow the Reporting brwoser to wait for each visualization to
+signal that it is done renderings. Defaults to `30000` (30 seconds).
+
+[NOTE]
+============
+If any timeouts from `xpack.reporting.capture.timeouts.*` settings occur when
+running a report job, Reporting will log the error and try to continue
+capturing the page with a screenshot. As a result, a download will be
+available, but there will likely be errors in the visualizations in the report.
+============
+
 `xpack.reporting.capture.maxAttempts`::
 If capturing a report fails for any reason, Kibana will re-attempt othe reporting
 job, as many times as this setting. Defaults to `3`.

x-pack/legacy/plugins/reporting/config.ts

@@ -31,6 +31,17 @@ export async function config(Joi: any) {
         .default(120000),
     }).default(),
     capture: Joi.object({
+      timeouts: Joi.object({
+        openUrl: Joi.number()
+          .integer()
+          .default(30000),
+        waitForElements: Joi.number()
+          .integer()
+          .default(30000),
+        renderComplete: Joi.number()
+          .integer()
+          .default(30000),
+      }).default(),
       networkPolicy: Joi.object({
         enabled: Joi.boolean().default(true),
         rules: Joi.array()

x-pack/legacy/plugins/reporting/export_types/common/constants.ts

@@ -9,4 +9,4 @@ export const LayoutTypes = {
   PRINT: 'print',
 };
 
-export const WAITFOR_SELECTOR = '.application';
+export const PAGELOAD_SELECTOR = '.application';

x-pack/legacy/plugins/reporting/export_types/common/layouts/layout.ts

@@ -27,7 +27,6 @@ export interface LayoutSelectorDictionary {
   renderComplete: string;
   itemsCountAttribute: string;
   timefilterDurationAttribute: string;
-  toastHeader: string;
 }
 
 export interface PdfImageSize {
@@ -40,7 +39,6 @@ export const getDefaultLayoutSelectors = (): LayoutSelectorDictionary => ({
   renderComplete: '[data-shared-item]',
   itemsCountAttribute: 'data-shared-items-count',
   timefilterDurationAttribute: 'data-shared-timefilter-duration',
-  toastHeader: '[data-test-subj="euiToastHeader"]',
 });
 
 export abstract class Layout {
@@ -75,9 +73,11 @@ export interface LayoutParams {
   dimensions: Size;
 }
 
-export type LayoutInstance = Layout & {
+interface LayoutSelectors {
   // Fields that are not part of Layout: the instances
   // independently implement these fields on their own
   selectors: LayoutSelectorDictionary;
   positionElements?: (browser: HeadlessChromiumDriver, logger: LevelLogger) => Promise<void>;
-};
+}
+
+export type LayoutInstance = Layout & LayoutSelectors & Size;

x-pack/legacy/plugins/reporting/export_types/common/layouts/preserve_layout.ts

@@ -19,8 +19,8 @@ const ZOOM: number = 2;
 export class PreserveLayout extends Layout {
   public readonly selectors: LayoutSelectorDictionary = getDefaultLayoutSelectors();
   public readonly groupCount = 1;
-  private readonly height: number;
-  private readonly width: number;
+  public readonly height: number;
+  public readonly width: number;
   private readonly scaledHeight: number;
   private readonly scaledWidth: number;
 

x-pack/legacy/plugins/reporting/export_types/common/lib/screenshots/constants.ts

@@ -9,6 +9,6 @@ export const CONTEXT_INJECTCSS = 'InjectCss';
 export const CONTEXT_WAITFORRENDER = 'WaitForRender';
 export const CONTEXT_GETTIMERANGE = 'GetTimeRange';
 export const CONTEXT_ELEMENTATTRIBUTES = 'ElementPositionAndAttributes';
-export const CONTEXT_CHECKFORTOASTMESSAGE = 'CheckForToastMessage';
 export const CONTEXT_WAITFORELEMENTSTOBEINDOM = 'WaitForElementsToBeInDOM';
 export const CONTEXT_SKIPTELEMETRY = 'SkipTelemetry';
+export const CONTEXT_READMETADATA = 'ReadVisualizationsMetadata';

x-pack/legacy/plugins/reporting/export_types/common/lib/screenshots/get_element_position_data.ts

@@ -4,6 +4,7 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
+import { i18n } from '@kbn/i18n';
 import { HeadlessChromiumDriver as HeadlessBrowser } from '../../../../server/browsers';
 import { LayoutInstance } from '../../layouts/layout';
 import { AttributesMap, ElementsPositionAndAttribute } from './types';
@@ -14,50 +15,58 @@ export const getElementPositionAndAttributes = async (
   browser: HeadlessBrowser,
   layout: LayoutInstance,
   logger: Logger
-): Promise<ElementsPositionAndAttribute[]> => {
-  const elementsPositionAndAttributes: ElementsPositionAndAttribute[] = await browser.evaluate(
-    {
-      fn: (selector: string, attributes: any) => {
-        const elements: NodeListOf<Element> = document.querySelectorAll(selector);
+): Promise<ElementsPositionAndAttribute[] | null> => {
+  const { screenshot: screenshotSelector } = layout.selectors; // data-shared-items-container
+  let elementsPositionAndAttributes: ElementsPositionAndAttribute[] | null;
+  try {
+    elementsPositionAndAttributes = await browser.evaluate(
+      {
+        fn: (selector, attributes) => {
+          const elements: NodeListOf<Element> = document.querySelectorAll(selector);
 
-        // NodeList isn't an array, just an iterator, unable to use .map/.forEach
-        const results: ElementsPositionAndAttribute[] = [];
-        for (let i = 0; i < elements.length; i++) {
-          const element = elements[i];
-          const boundingClientRect = element.getBoundingClientRect() as DOMRect;
-          results.push({
-            position: {
-              boundingClientRect: {
-                // modern browsers support x/y, but older ones don't
-                top: boundingClientRect.y || boundingClientRect.top,
-                left: boundingClientRect.x || boundingClientRect.left,
-                width: boundingClientRect.width,
-                height: boundingClientRect.height,
+          // NodeList isn't an array, just an iterator, unable to use .map/.forEach
+          const results: ElementsPositionAndAttribute[] = [];
+          for (let i = 0; i < elements.length; i++) {
+            const element = elements[i];
+            const boundingClientRect = element.getBoundingClientRect() as DOMRect;
+            results.push({
+              position: {
+                boundingClientRect: {
+                  // modern browsers support x/y, but older ones don't
+                  top: boundingClientRect.y || boundingClientRect.top,
+                  left: boundingClientRect.x || boundingClientRect.left,
+                  width: boundingClientRect.width,
+                  height: boundingClientRect.height,
+                },
+                scroll: {
+                  x: window.scrollX,
+                  y: window.scrollY,
+                },
               },
-              scroll: {
-                x: window.scrollX,
-                y: window.scrollY,
-              },
-            },
-            attributes: Object.keys(attributes).reduce((result: AttributesMap, key) => {
-              const attribute = attributes[key];
-              (result as any)[key] = element.getAttribute(attribute);
-              return result;
-            }, {} as AttributesMap),
-          });
-        }
-        return results;
+              attributes: Object.keys(attributes).reduce((result: AttributesMap, key) => {
+                const attribute = attributes[key];
+                (result as any)[key] = element.getAttribute(attribute);
+                return result;
+              }, {} as AttributesMap),
+            });
+          }
+          return results;
+        },
+        args: [screenshotSelector, { title: 'data-title', description: 'data-description' }],
       },
-      args: [layout.selectors.screenshot, { title: 'data-title', description: 'data-description' }],
-    },
-    { context: CONTEXT_ELEMENTATTRIBUTES },
-    logger
-  );
-
-  if (elementsPositionAndAttributes.length === 0) {
-    throw new Error(
-      `No shared items containers were found on the page! Reporting requires a container element with the '${layout.selectors.screenshot}' attribute on the page.`
+      { context: CONTEXT_ELEMENTATTRIBUTES },
+      logger
     );
+
+    if (!elementsPositionAndAttributes || elementsPositionAndAttributes.length === 0) {
+      throw new Error(
+        i18n.translate('xpack.reporting.screencapture.noElements', {
+          defaultMessage: `An error occurred while reading the page for visualization panels: no panels were found.`,
+        })
+      );
+    }
+  } catch (err) {
+    elementsPositionAndAttributes = null;
   }
 
   return elementsPositionAndAttributes;