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How to use updateExtraHTTPHeaders method in Playwright Internal

Best JavaScript code snippet using playwright-internal

crBrowser.js

...380    for (const page of this.pages()) await page._delegate.updateGeolocation();381  }382  async setExtraHTTPHeaders(headers) {383    this._options.extraHTTPHeaders = headers;384    for (const page of this.pages()) await page._delegate.updateExtraHTTPHeaders();385  }386  async setOffline(offline) {387    this._options.offline = offline;388    for (const page of this.pages()) await page._delegate.updateOffline();389  }390  async _doSetHTTPCredentials(httpCredentials) {391    this._options.httpCredentials = httpCredentials;392    for (const page of this.pages()) await page._delegate.updateHttpCredentials();393  }394  async _doAddInitScript(source) {395    this._evaluateOnNewDocumentSources.push(source);396    for (const page of this.pages()) await page._delegate.evaluateOnNewDocument(source);397  }398  async _doExposeBinding(binding) {...

page.js

Source: page.js

...177    await this._delegate.exposeBinding(binding);178  }179  setExtraHTTPHeaders(headers) {180    this._state.extraHTTPHeaders = headers;181    return this._delegate.updateExtraHTTPHeaders();182  }183  async _onBindingCalled(payload, context) {184    if (this._disconnected || this._closedState === 'closed') return;185    await PageBinding.dispatch(this, payload, context);186  }187  _addConsoleMessage(type, args, location, text) {188    const message = new _console.ConsoleMessage(this, type, text, args, location);189    const intercepted = this._frameManager.interceptConsoleMessage(message);190    if (intercepted || !this.listenerCount(Page.Events.Console)) args.forEach(arg => arg.dispose());else this.emit(Page.Events.Console, message);191  }192  async reload(metadata, options) {193    const controller = new _progress.ProgressController(metadata, this);194    return controller.run(progress => this.mainFrame().raceNavigationAction(async () => {195      // Note: waitForNavigation may fail before we get response to reload(),...

wkBrowser.js

Source: wkBrowser.js

...255    });256  }257  async setExtraHTTPHeaders(headers) {258    this._options.extraHTTPHeaders = headers;259    for (const page of this.pages()) await page._delegate.updateExtraHTTPHeaders();260  }261  async setOffline(offline) {262    this._options.offline = offline;263    for (const page of this.pages()) await page._delegate.updateOffline();264  }265  async _doSetHTTPCredentials(httpCredentials) {266    this._options.httpCredentials = httpCredentials;267    for (const page of this.pages()) await page._delegate.updateHttpCredentials();268  }269  async _doAddInitScript(source) {270    this._evaluateOnNewDocumentSources.push(source);271    for (const page of this.pages()) await page._delegate._updateBootstrapScript();272  }273  async _doExposeBinding(binding) {...

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3    const browser = await playwright.chromium.launch();4    const context = await browser.newContext();5    const page = await context.newPage();6    await page.context().updateExtraHTTPHeaders({7    });8    await page.reload();9    await browser.close();10})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3    const browser = await chromium.launch();4    const context = await browser.newContext();5    const page = await context.newPage();6    await page.evaluate(() => {7        const { updateExtraHTTPHeaders } = window.playwright._internal;8        updateExtraHTTPHeaders({ 'foo': 'bar' });9    });10    await page.screenshot({ path: 'example.png' });11    await browser.close();12})();

Using AI Code Generation

1const { chromium } = require('playwright');2const path = require('path');3const fs = require('fs');4(async () => {5  const browser = await chromium.launch({ headless: false });6  const context = await browser.newContext();7  const page = await context.newPage();8  const extraHTTPHeaders = {9  };10  await context.updateExtraHTTPHeaders(extraHTTPHeaders);11  await page.screenshot({ path: 'google.png' });12  await browser.close();13})();14const { chromium } = require('playwright');15const path = require('path');16const fs = require('fs');17(async () => {18  const browser = await chromium.launch({ headless: false });19  const context = await browser.newContext();20  const page = await context.newPage();21  const extraHTTPHeaders = {22  };23  await context.updateExtraHTTPHeaders(extraHTTPHeaders);24  await page.screenshot({ path: 'google.png' });25  await browser.close();26})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext({ extraHTTPHeaders: {foo: 'bar'} });5  const page = await context.newPage();6  await context.updateExtraHTTPHeaders({foo: 'bar', 'User-Agent': 'Playwright'});7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const context = await browser.newContext({ extraHTTPHeaders: {foo: 'bar'} });13  const page = await context.newPage();14  await browser.updateExtraHTTPHeaders({foo: 'bar', 'User-Agent': 'Playwright'});15  await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19  const browser = await chromium.launch();20  const context = await browser.newContext({ extraHTTPHeaders: {foo: 'bar'} });21  const page = await context.newPage();

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = require('playwright');3const { webkit } = require('playwright');4const { firefox } = require('playwright');5(async () => {6  const browser = await chromium.launch();7  const context = await browser.newContext();8  await context.updateExtraHTTPHeaders({9    'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36',10  });11  const page = await context.newPage();12  await page.screenshot({ path: `example.png` });13  await browser.close();14})();15const playwright = require('playwright');16const { chromium } = require('playwright');17const { webkit } = require('playwright');18const { firefox } = require('playwright');19(async () => {20  const browser = await chromium.launch();21  const context = await browser.newContext();22  await context.setExtraHTTPHeaders({23    'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36',24  });25  const page = await context.newPage();26  await page.screenshot({ path: `example.png` });27  await browser.close();28})();29const playwright = require('playwright');30const { chromium } = require('playwright');31const { webkit } = require('playwright');32const { firefox } = require('playwright');33(async () => {34  const browser = await chromium.launch();35  const context = await browser.newContext();36  await context.updateExtraHTTPHeaders({37    'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/

Using AI Code Generation

1const {chromium} = require("playwright");2(async () => {3  const browser = await chromium.launch({4  });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.evaluate(() => {8    const { updateExtraHTTPHeaders } = window.playwright;9    updateExtraHTTPHeaders({10    });11  });12  await browser.close();13})();

Using AI Code Generation

1async function updateExtraHTTPHeaders(page, headers) {2  return page._delegate.updateExtraHTTPHeaders(headers);3}4async function updateExtraHTTPHeaders(page, headers) {5  return page._delegate.updateExtraHTTPHeaders(headers);6}7async function updateExtraHTTPHeaders(page, headers) {8  return page._delegate.updateExtraHTTPHeaders(headers);9}10async function updateExtraHTTPHeaders(page, headers) {11  return page._delegate.updateExtraHTTPHeaders(headers);12}13async function updateExtraHTTPHeaders(page, headers) {14  return page._delegate.updateExtraHTTPHeaders(headers);15}16async function updateExtraHTTPHeaders(page, headers) {17  return page._delegate.updateExtraHTTPHeaders(headers);18}19async function updateExtraHTTPHeaders(page, headers) {20  return page._delegate.updateExtraHTTPHeaders(headers);21}22async function updateExtraHTTPHeaders(page, headers) {23  return page._delegate.updateExtraHTTPHeaders(headers);24}25async function updateExtraHTTPHeaders(page, headers) {26  return page._delegate.updateExtraHTTPHeaders(headers);27}28async function updateExtraHTTPHeaders(page, headers) {29  return page._delegate.updateExtraHTTPHeaders(headers);30}31async function updateExtraHTTPHeaders(page, headers) {32  return page._delegate.updateExtraHTTPHeaders(headers);33}34async function updateExtraHTTPHeaders(page, headers) {35  return page._delegate.updateExtraHTTPHeaders(headers);36}37async function updateExtraHTTPHeaders(page, headers) {38  return page._delegate.updateExtraHTTPHeaders(headers);39}

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({4  });5  const context = await browser.newContext({6    extraHTTPHeaders: {7    }8  });9  const page = await context.newPage();10  await page.screenshot({ path: 'headers.png' });11  await browser.close();12})();13const { chromium } = require('playwright');14(async () => {15  const browser = await chromium.launch({16  });17  const context = await browser.newContext({18    extraHTTPHeaders: {19    }20  });21  const page = await context.newPage();22  await page.screenshot({ path: 'headers.png' });23  await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27  const browser = await chromium.launch({28  });29  const context = await browser.newContext({30    extraHTTPHeaders: {31    }32  });33  const page = await context.newPage();34  await page.screenshot({ path: 'headers.png' });35  await browser.close();36})();37const { chromium } = require('playwright');38(async () => {39  const browser = await chromium.launch({40  });41  const context = await browser.newContext({42    extraHTTPHeaders: {43    }44  });45  const page = await context.newPage();

Using AI Code Generation

1const playwright = require( 'playwright' );2const browser = await playwright.chromium.launch();3const context = await browser.newContext({4   extraHTTPHeaders: {5   },6});7const page = await context.newPage();8await context.updateExtraHTTPHeaders({9});10await browser.close();

StackOverFlow community discussions

Questions

Discussion

How to run a list of test suites in a single file concurrently in jest?

Is it possible to get the selector from a locator object in playwright?

firefox browser does not start in playwright

Jest + Playwright - Test callbacks of event-based DOM library

Running Playwright in Azure Function

firefox browser does not start in playwright

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

Well this is one way, but not sure if it will work for all possible locators!.

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}

https://stackoverflow.com/questions/72044959/is-it-possible-to-get-the-selector-from-a-locator-object-in-playwright

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})

https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

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