I've read about the Chrome Headless from developers.google said we can run the Google without UI. Quote from that link :
Headless Chrome is shipping in Chrome 59. It's a way to run the Chrome
browser in a headless environment. Essentially, running Chrome without
chrome! It brings all modern web platform features provided by
Chromium and the Blink rendering engine to the command line.
Why is that useful?
A headless browser is a great tool for automated testing and server
environments where you don't need a visible UI shell. For example, you
may want to run some tests against a real web page, create a PDF of
it, or just inspect how the browser renders an URL.
This is really great feature, so I do some experiment with this cool feature. The idea is to taking snapshot as the document site by do call of chrome.exe from Windows Command Prompt, as follow :
chrome --headless --disable-gpu --screenshot https://www.chromestatus.com/
After do several times and following the instruction from these site. I got nothing. I don't get any picture or screenshot with name screenshot.png as document mention it before Running with --screenshot will produce a file named screenshot.png in the current working directory.
From this document also said about version,
Caution: Headless mode is available on Mac and Linux in Chrome 59.
Windows support is coming in Chrome 60. To check what version of
Chrome you have, open chrome://version.
after do some check with suggested before, I run chrome://version on my Chrome on Windows x64 Machine and got some result :
Google Chrome 62.0.3202.94 (Official Build) (64-bit) (cohort: Stable)
Revision 4fd852a98d66564c88736c017b0a0b0478e885ad-refs/branch-heads/3202#{#789}
What wrong? What i missed?
Thanks
After do some experiments. for --screenshot will save the image on the same level as chrome.exe location and that will be mean save on Program Files.
So we need need to combine parameter names and arguments with a =
--screenshot="D:\screen.png" will work, otherwise Chrome writes to it's installation folder. Big design flaw, no software should use it's installation folder as a working directory.
Here are the complete argument :
chrome --headless --enable-logging --disable-gpu --screenshot="D:\screen.png" "https://www.chromestatus.com/"
Related
I'm switching to VSCode WSL Remote mode for a JavaScript project. The Chrome Debugger Extension always look for Google Chrome in Linux. Is this the correct behavior?
I have a Chrome for Linux installed in WSL, which could run on X server. The problem is that the breakpoints are not working.
I've tried removing Chrome in WSL, the extension will then throw Can't find Chrome - install it or set the "runtimeExecutable" field in the launch config.
Should I set "runtimeExecutable" to chrome.exe or force it to run on local side with
"remote.extensionKind": {
"msjsdiag.debugger-for-chrome": "ui",
}
Could I correct some config so that the Chrome Debugger can find the Chrome in Windows if there's no Linux install?
Is there any official guide for it?
Thanks!
Yes, you should set
"remote.extensionKind": {
"msjsdiag.debugger-for-chrome": "ui"}
An alternative would be to set an alias chrome to go to chrome.exe in Windows. To ensure persistence, add it to your ~.bashrc or shell equivalent or alternatively .profile.
Side note: you should be able to debug with the new chromium-based Edge as well if you prefer using that.
Does Chrome update itself when running in headless mode by selenium?
It seems, it is not updating, probably because of --disable-background-networking switch set by Selenium by default. I want to ensure that's indeed the case. If there any reference in documentation explaining either auto-update behavior or meaning of switches and their impact? So far best I've found is list with all command line Chrome switches with some comments, but it is still not clear.
No, Chrome Browser Client doesn't update itself when running in headless mode by selenium.
As per Getting Started with Headless Chrome the Headless Chrome is the server environment where you don't need a visible UI shell.
If you've got Chrome 59+ installed, you start Chrome with the --headless flag as follows:
chrome \
--headless \ # Runs Chrome in headless mode.
--disable-gpu \ # Temporarily needed if running on Windows.
chrome should always point to your installation of Chrome. Of course, the exact location varies from platform to platform.
So until and unless the original Chrome Browser is automatically/manually updated, Chrome Browser Client doesn't get updated.
TL;DR
--disable-background-networking is configured to disable several subsystems which run network requests in the background. This is used when performing network performance testing in order to avoid noise in the measurements.
I like to run my karma unit tests on a headless chrome. Using karma-chrome-launcher and setting the browser to "ChromeHeadless" works on my machine. But on the CI server it fails with the message "No binary for ChromeHeadless browser on your platform."
Installing chrome on the CI machine is not possible. Is there another way to load the chrome binaries?
for example the google puppeteer module seems to load that when run. from the docs: "Puppeteer downloads and uses a specific version of Chromium". How can i achieve the same?
You can use Puppeteer (headless Chromium), follow these instructions.
If what you fear is that download from the internet might be slow, you can tell puppeteer where to download chrome from and use a local address.
Use PUPPETEER_DOWNLOAD_HOST to specify where to download Chrome from and PUPPETEER_SKIP_CHROMIUM_DOWNLOAD to skip downloading Chrome altogether.
You can read more about this in the documentation.
Does wct config allow for choosing a specific version of Chrome, like Chrome 34?
It seems to install chrome at the beginning every time I run wtc.
Following Polymer Documentation, it's possible to run tests choosing a browser installed on your computer. If you have Chrome 34 version and you execute test -l chrome, tests will run with this version. If you don't have Chrome 34, it's no possible.
All supported browsers to run tests are aurora, canary, chrome, firefox and ie.
Web Component Tester automatically finds all of the browsers installed
on your system and runs your tests against each one. If you wanted to
run your tests against a single browser, say Google Chrome, you could
polymer test -l chrome.
I would like to reuse already installed in the system Chromium browser and do not additionally install Chrome (because then I can't use Chromium at the same time - they share one profile folder by default on OSX, also for other reasons)
Here are ideas, the problem is - they are just conceptual, not ready to implement:
edit Brackets configs (didn't find much of them) to call Chromium (how it calls)
edit Chromium configs (to mimic the Chrome?)
use dev tools remote debugger and connect to created web-socket
create link to Chromium via: sudo ln -s ~/Applications/Chromium.app/Contents/MacOS/Chromium /usr/bin/google-chrome // didn't work
connect to the simple static server from the folder (via httpster) // didn't work
How is it possible to use Chromium instead of Google Chrome to use Brackets' Live Development feature?
On Mac, Brackets locates Chrome based on its bundle identifier. So in theory, if you hack Chromium's Info.plist to change its bundle id to com.google.Chrome (and I guess remove or patch any copies of Chrome that might collide with that) -- then Brackets should launch Chromium for you.
In the future, Brackets plans to make this more configurable as an official feature - but it's not there yet.