Recently Qt introduced the QtWebEngine module. Is there a way to invoke developer tools and debug JavaScript code inside QWebEngineView? It was possible with QWebView using
page()->settings()->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);
but I couldn't find any similar option in QWebEngineView.
I just ran across this so I added it here for posterity.
It was just added to Qt 5.5 git. You have to enable it via an environment variable QTWEBENGINE_REMOTE_DEBUGGING=<port>. You can put 0.0.0.0:<port> if you are doing debugging of an embedded device and cant use the local console. Then you can point can connect to http://127.0.0.1: to get the debugger. It will need to be a chromium based browser. Do you have to use Chrome, or you can actually use the "quick nano browser" example if you want.
Alternatively, one may embed Firebug Lite to get a JavaScript console and inspectors.
Just add
<script type="text/javascript" src="https://getfirebug.com/firebug-lite.js"></script>
into the page. Pressing F12 will visualize the Firebug console.
If your devtools view and page are in the same program，use qt function to directly navigate to page devtools instead of http://localhost:port whith is devtools index(have to select devtools of whitch page).
After QTWEBENGINE_REMOTE_DEBUGGING being set up
>=5.13:
void QWebEnginePage::setDevToolsPage(QWebEnginePage *devToolsPage)
5.11~5.12:
void QWebEnginePage::setInspectedPage(QWebEnginePage *page)
Sample pyqt5.12
dev_view = QWebEngineView() # new web view
self.page().setDevToolsPage(dev_view.page()) # self is the source web view
Reference:
https://doc.qt.io/qt-5/qwebenginepage.html#setDevToolsPage
https://doc.qt.io/qt-5/qwebenginepage.html#setInspectedPage
For PyQt5 the following snippet:
self.mainLayout = QtWidgets.QVBoxLayout()
self.webView = QtWebEngineWidgets.QWebEngineView()
self.mainLayout.addWidget(self.webView, 100)
self.webView.settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.JavascriptEnabled, True)
self.webView.settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.LocalContentCanAccessRemoteUrls, True)
self.webView.settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.ErrorPageEnabled, True)
self.webView.settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.PluginsEnabled, True)
dev_view = QtWebEngineWidgets.QWebEngineView()
self.mainLayout.addWidget(dev_view, 100)
self.webView.page().setDevToolsPage(dev_view.page())
From http://blog.qt.io/blog/2015/03/17/qt-5-5-alpha-available/:
The remote inspector can be used by either defining the env variable
QTWEBENGINE_REMOTE_DEBUGGING, or by supplying the
–remote-debugging-port command line argument. You can then point a
browser at the specified port and inspect your web content.
look this：
The Chromium DevTools provide the ability to inspect and debug layout and performance issues of any web content
https://doc.qt.io/qt-5/qtwebengine-features.html#chromium-devtools
Related
How do i set up a custom protocol handler in chrome? Something like:
myprotocol://testfile
I would need this to send a request to http://example.com?query=testfile, then send the httpresponse to my extension.
The following method registers an application to a URI Scheme. So, you can use mycustproto: in your HTML code to trigger a local application. It works on a Google Chrome Version 51.0.2704.79 m (64-bit).
I mainly used this method for printing document silently without the print dialog popping up. The result is pretty good and is a seamless solution to integrate the external application with the browser.
HTML code (simple):
Click Me
HTML code (alternative):
<input id="DealerName" />
<button id="PrintBtn"></button>
$('#PrintBtn').on('click', function(event){
event.preventDefault();
window.location.href = 'mycustproto:dealer ' + $('#DealerName').val();
});
URI Scheme will look like this:
You can create the URI Scheme manually in registry, or run the "mycustproto.reg" file (see below).
HKEY_CURRENT_USER\Software\Classes
mycustproto
(Default) = "URL:MyCustProto Protocol"
URL Protocol = ""
DefaultIcon
(Default) = "myprogram.exe,1"
shell
open
command
(Default) = "C:\Program Files\MyProgram\myprogram.exe" "%1"
mycustproto.reg example:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Classes\mycustproto]
"URL Protocol"="\"\""
#="\"URL:MyCustProto Protocol\""
[HKEY_CURRENT_USER\Software\Classes\mycustproto\DefaultIcon]
#="\"mycustproto.exe,1\""
[HKEY_CURRENT_USER\Software\Classes\mycustproto\shell]
[HKEY_CURRENT_USER\Software\Classes\mycustproto\shell\open]
[HKEY_CURRENT_USER\Software\Classes\mycustproto\shell\open\command]
#="\"C:\\Program Files\\MyProgram\\myprogram.exe\" \"%1\""
C# console application - myprogram.exe:
using System;
using System.Collections.Generic;
using System.Text;
namespace myprogram
{
class Program
{
static string ProcessInput(string s)
{
// TODO Verify and validate the input
// string as appropriate for your application.
return s;
}
static void Main(string[] args)
{
Console.WriteLine("Raw command-line: \n\t" + Environment.CommandLine);
Console.WriteLine("\n\nArguments:\n");
foreach (string s in args)
{
Console.WriteLine("\t" + ProcessInput(s));
}
Console.WriteLine("\nPress any key to continue...");
Console.ReadKey();
}
}
}
Try to run the program first to make sure the program has been placed in the correct path:
cmd> "C:\Program Files\MyProgram\myprogram.exe" "mycustproto:Hello World"
Click the link on your HTML page:
You will see a warning window popup for the first time.
To reset the external protocol handler setting in Chrome:
If you have ever accepted the custom protocol in Chrome and would like to reset the setting, do this (currently, there is no UI in Chrome to change the setting):
Edit "Local State" this file under this path:
C:\Users\Username\AppData\Local\Google\Chrome\User Data\
or Simply go to:
%USERPROFILE%\AppData\Local\Google\Chrome\User Data\
Then, search for this string: protocol_handler
You will see the custom protocol from there.
Note: Please close your Google Chrome before editing the file. Otherwise, the change you have made will be overwritten by Chrome.
Reference:
https://msdn.microsoft.com/en-us/library/aa767914(v=vs.85).aspx
Chrome 13 now supports the navigator.registerProtocolHandler API. For example,
navigator.registerProtocolHandler(
'web+custom', 'http://example.com/rph?q=%s', 'My App');
Note that your protocol name has to start with web+, with a few exceptions for common ones (like mailto, etc). For more details, see: http://updates.html5rocks.com/2011/06/Registering-a-custom-protocol-handler
This question is old now, but there's been a recent update to Chrome (at least where packaged apps are concerned)...
http://developer.chrome.com/apps/manifest/url_handlers
and
https://github.com/GoogleChrome/chrome-extensions-samples/blob/e716678b67fd30a5876a552b9665e9f847d6d84b/apps/samples/url-handler/README.md
It allows you to register a handler for a URL (as long as you own it). Sadly no myprotocol:// but at least you can do http://myprotocol.mysite.com and can create a webpage there that points people to the app in the app store.
This is how I did it. Your app would need to install a few reg keys on installation, then in any browser you can just link to foo:\anythingHere.txt and it will open your app and pass it that value.
This is not my code, just something I found on the web when searching the same question. Just change all "foo" in the text below to the protocol name you want and change the path to your exe as well.
(put this in to a text file as save as foo.reg on your desktop, then double click it to install the keys)
-----Below this line goes into the .reg file (NOT including this line)------
REGEDIT4
[HKEY_CLASSES_ROOT\foo]
#="URL:foo Protocol"
"URL Protocol"=""
[HKEY_CLASSES_ROOT\foo\shell]
[HKEY_CLASSES_ROOT\foo\shell\open]
[HKEY_CLASSES_ROOT\foo\shell\open\command]
#="\"C:\\Program Files (x86)\\Notepad++\\notepad++.exe\" \"%1\""
Not sure whether this is the right place for my answer, but as I found very few helpful threads and this was one of them, I am posting my solution here.
Problem: I wanted Linux Mint 19.2 Cinnamon to open Evolution when clicking on mailto links in Chromium. Gmail was registered as default handler in chrome://settings/handlers and I could not choose any other handler.
Solution:
Use the xdg-settings in the console
xdg-settings set default-url-scheme-handler mailto org.gnome.Evolution.desktop
Solution was found here https://alt.os.linux.ubuntu.narkive.com/U3Gy7inF/kubuntu-mailto-links-in-chrome-doesn-t-open-evolution and adapted for my case.
I've found the solution by Jun Hsieh and MuffinMan generally works when it comes to clicking links on pages in Chrome or pasting into the URL bar, but it doesn't seem to work in a specific case of passing the string on the command line.
For example, both of the following commands open a blank Chrome window which then does nothing.
"c:\Program Files (x86)\Google\Chrome\Application\chrome.exe" "foo://C:/test.txt"
"c:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --new-window "foo://C:/test.txt"
For comparison, feeding Chrome an http or https URL with either of these commands causes the web page to be opened.
This became apparent because one of our customers reported that clicking links for our product from a PDF being displayed within Adobe Reader fails to invoke our product when Chrome is the default browser. (It works fine with MSIE and Firefox as default, but not when either Chrome or Edge are default.)
I'm guessing that instead of just telling Windows to invoke the URL and letting Windows figure things out, the Adobe product is finding the default browser, which is Chrome in this case, and then passing the URL on the command line.
I'd be interested if anyone knows of Chrome security or other settings which might be relevant here so that Chrome will fully handle a protocol handler, even if it's provided via the command line. I've been looking but so far haven't found anything.
I've been testing this against Chrome 88.0.4324.182.
open
C:\Users\<Username>\AppData\Local\Google\Chrome\User Data\Default
open Preferences then search for excluded_schemes you will find it in 'protocol_handler' delete this excluded scheme(s) to reset chrome to open url with default application
Where can I find the documentation that describes the options I can use with Selenium and Chrome web browser? I want to open a link in a web browser (to get credential) but not to download the corresponding file (.pdf or .tiff or .jpeg). I am using Python 2.7, selenium 3.0.1 and Chrome version 54.0.2840.99 (and chromedriver.exe) on Windows 7 Laptop.
# Chrome web browser.
options = webdriver.ChromeOptions()
options.add_argument('--ignore-certificate-errors')
#options.add_argument('--disable-download-notification') #doesn't seems to work
#options.add_experimental_option("prefs", {"download.default_directory","C:\Users\xxx\downloads\Test"}) # doesn't work
#options.add_experimental_option("prefs", {"download.prompt_for_download": False}) # doesn't seems to work
#options.add_experimental_option("prefs", {'profile.default_content_settings': {'images': 2}})# this will disable image loading in the browser
options.add_argument("user-agent="+user_agent_profile)
driver_main = webdriver.Chrome(chrome_options=options)
# Opening the web application portail.
driver_main.get("https://my_link")
I found many discussions on this topic but none of the solution works. For example:
add_experimental_option("prefs", {"download.default_directory","C:\Users\xxx\downloads\Test"})
doesn't work for me.
Same for:
add_experimental_option("prefs", {"download.prompt_for_download": False})
(I also try with "false").
While:
add_argument("user-agent="+user_agent_profile)
Seems to work!
I am not sure to understand what is wrong
The issue I got is that, it starts to download the file each time I open a link with name file(1) file(2) .... file(99) then starting at 100 it opens a popup window "Save As". So I would like to either don't download the file at all or be able to move it in a specific folder in the "Recycle Bin".
How do I find which options could be I used with add_argument and add_argument? I tried to look at Chrome://about/ but I couldn't see a direct correspondence.
Thanks a lot.
Cheers.
Fabien.
The path you declared for the default directory is invalid. Either escape the back slashes or provide a literal string.
options = webdriver.ChromeOptions()
options.add_experimental_option("prefs", {
"download.default_directory": r"C:\Users\xxx\downloads\Test",
"download.prompt_for_download": False,
"download.directory_upgrade": True,
"safebrowsing.enabled": True
})
driver = webdriver.Chrome(chrome_options=options)
Here are the available preferences:
https://cs.chromium.org/chromium/src/chrome/common/pref_names.cc
It makes all the difference in the world to use the forward slash "/" when specifying the directory in which you want things to be downloaded.
I'm guessing this is because that directory will be exported to something like the Powershell, where the usual backslash "\" won't properly work.
Like this. What API should I use to show this box?
update:
I successed in sublime-text 3,but failed in sublime-text 2.Do you know why?
The code is:
import sublime, sublime_plugin
class CCAutoComplete(sublime_plugin.EventListener):
def on_query_completions(self, view, prefix, locations):
flag = sublime.INHIBIT_WORD_COMPLETIONS | sublime.INHIBIT_EXPLICIT_COMPLETIONS
result = ([["abv","abv"],["abcd123","abcd"]],flag)
return result
The auto-completion panel can be manually populated with the on_query_completions listener.
To view a functioning example of it's implementation:
Install PackageResourceViewer
Run PackageResourceViewer: Open Resource from the command palette
Select the CSS package and open css_completions.py
I am running RStudio on a server and I created a RMarkdown (.Rmd) file. It works fine if I create it as a static HTML but it does not work if I want it to be interactive (by adding runtime:shiny).
The issue is that when I add runtime:shiny and press the Run Document button the application will try to open at 127.0.0.1:xxxx (here xxxx is a random port). In order to make it work I would have to be able to change the host parameter to '0.0.0.0'. This is an option in the runApp function from the shiny package but I don't know how to add this option in RMarkdown.
Can anyone help me with this?
Thank you.
The ::run command from rmarkdown invokes shiny::runApp internally. You can set the option shiny.host before running the document:
options(shiny.host="0.0.0.0")
rmarkdown::run("myfile.Rmd")
You an also pass arbitrary paramters to runApp, so this should work too:
rmarkdown::run("myfile.Rmd", shiny_args=list(host="0.0.0.0"))
Neither of these will work with the Run Document button; that button starts a new R session in which to render the document. To change the shiny.host option in that session, you'll need to add the option to your .Rprofile.
Set the default values you want to initialize in (~/.Rprofile) under user directory
Sys.setenv(TZ = "UTC") # for Timezone
options(shiny.port = 9999)
Error Details:
The Web application at
http://dev001aaamaaind:333/ could
not be found. Verify that you have
typed the URL correctly. If the URL
should be serving existing content,
the system administrator may need to
add a new request URL mapping to the
intended application.
string urlSite = "http://dev001aaamaaind:333/";
using (SPSite sc = new SPSite(urlSite))//Getting Error in the line
{
SPWeb site = sc.RootWeb;
foreach (SPList list in site.Lists)
{
if (!list.Hidden)
Console.WriteLine(list.Title);
}
}
Make sure that you have set the Platform in the Project Properties Build tab to either to x64 or Any CPU. This is one common issue that hit when developing using SharePoint 2010 as it is based on 64 bit Arch.
http://spserver2010.blogspot.com/2010/09/visual-studio-2010-beta-console.html