Currently I need to get command line arguments from an Electron application. So if you start the application with command line arguments, I need to use the arguments within the renderer process (a webview to be specific.)
This works fine when opening the application for the first time (using onload), but I'm having issues getting this to work when the application is already running and the user tries to reopen the app from cmd with args.
Currently, I'm using:
let closeDupeApp = app.makeSingleInstance(function(commandLine, workingDirectory) {
// Someone tried to run a second instance, we should focus our window.
if (mainWindow) {
if (mainWindow.isMinimized()) mainWindow.restore();
mainWindow.focus();
}
});
To prevent a second window from opening. However, I need the commandLine arguments and I need to send them to the renderer process.
Is there a way to do this?
You can read process.argv in the main process and paste it onto the end of the file:// url as a query string in BrowserWindow.open(). I do this routinely. You can JSON encode the and encodeURIComponent on the array to get a nice list in the renderer process.
Found a solution:
main.js
let closeDupeApp = app.makeSingleInstance(function(commandLine, workingDirectory) {
if (mainWindow) {
// Send args to renderer
mainWindow.webContents.send("cmdArgs", commandLine);
if (mainWindow.isMinimized()) mainWindow.restore();
mainWindow.focus();
}
});
rendererFile.js
require('electron').ipcRenderer.on('cmdArgs', function(event, cmdArgs) {
// STUFF
}
This is the error message that I get:
Failed to execute 'postMessage' on 'DOMWindow': The target origin provided
('https://www.youtube.com') does not match the recipient window's origin
('http://localhost:9000').
I've seen other similar problems where the target origin is http://www.youtube.com and the recipient origin is https://www.youtube.com, but none like mine where the target is https://www.youtube.com and the origin is http://localhost:9000.
I don't get the problem. What is the problem?
How can I fix it?
I believe this is an issue with the target origin being https. I suspect it is because your iFrame url is using http instead of https. Try changing the url of the file you are trying to embed to be https.
For instance:
'//www.youtube.com/embed/' + id + '?showinfo=0&enablejsapi=1&origin=http://localhost:9000';
to be:
'https://www.youtube.com/embed/' + id + '?showinfo=0&enablejsapi=1&origin=http://localhost:9000';
Just add the parameter "origin" with the URL of your site in the paramVars attribute of the player, like this:
this.player = new window['YT'].Player('player', {
videoId: this.mediaid,
width: '100%',
playerVars: {
'autoplay': 1,
'controls': 0,
'autohide': 1,
'wmode': 'opaque',
'origin': 'http://localhost:8100'
},
}
Setting this seems to fix it:
this$1.player = new YouTube.Player(this$1.elementId, {
videoId: videoId,
host: 'https://www.youtube.com',
You can save the JavaScript into local files:
https://www.youtube.com/player_api
https://s.ytimg.com/yts/jsbin/www-widgetapi-vfluxKqfs/www-widgetapi.js
Into the first file, player_api put this code:
if(!window.YT)var YT={loading:0,loaded:0};if(!window.YTConfig)var YTConfig={host:"https://www.youtube.com"};YT.loading||(YT.loading=1,function(){var o=[];YT.ready=function(n){YT.loaded?n():o.push(n)},window.onYTReady=function(){YT.loaded=1;for(var n=0;n<o.length;n++)try{o[n]()}catch(i){}},YT.setConfig=function(o){for(var n in o)o.hasOwnProperty(n)&&(YTConfig[n]=o[n])}}());
Into the second file, find the code: this.a.contentWindow.postMessage(a,b[c]);
and replace it with:
if(this._skiped){
this.a.contentWindow.postMessage(a,b[c]);
}
this._skiped = true;
Of course, you can concatenate into one file - will be more efficient.
This is not a perfect solution, but it's works!
My Source : yt_api-concat
Make sure you are loading from a URL such as:
https://www.youtube.com/embed/HIbAz29L-FA?modestbranding=1&playsinline=0&showinfo=0&enablejsapi=1&origin=https%3A%2F%2Fintercoin.org&widgetid=1
Note the "origin" component, as well as "enablejsapi=1". The origin must match what your domain is, and then it will be whitelisted and work.
In my case this had to do with lazy loading the iframe. Removing the iframe HTML attribute loading="lazy" solved the problem for me.
I got the same error. My mistake was that the enablejsapi=1 parameter was not present in the iframe src.
You also get this message when you do not specify a targetOrigin in calls to window.postMessage().
In this example we post a message to the first iFrame and use * as target, which should allow communication to any targetOrigin.
window.frames[0].postMessage({
message : "Hi there",
command :"hi-there-command",
data : "Some Data"
}, '*')
Try using window.location.href for the url to match the window's origin.
Remove DNS Prefetch will solve this issue.
If you're using WordPress, add this line in your theme's functions.php
remove_action( 'wp_head', 'wp_resource_hints', 2 );
There could be any of the following, but all of them lead into DOM not loaded before its accessed by the javascript.
So here is what you have to ensure before actually calling JS code:
* Make sure the container has loaded before any javascript is called
* Make sure the target URL is loaded in whatever container it has to
I came across the similar issue but on my local when I am trying to have my Javascript run well before onLoad of the main page which causes the error message. I have fixed it by simply waiting for whole page to load and then call the required function.
You could simply do this by adding a timeout function when page has loaded and call your onload event like:
window.onload = new function() {
setTimeout(function() {
// some onload event
}, 10);
}
that will ensure what you are trying will execute well after onLoad is trigger.
In my instance at least this seems to be a harmless "not ready" condition that the API retries until it succeeds.
I get anywhere from two to nine of these (on my worst-case-tester, a 2009 FossilBook with 20 tabs open via cellular hotspot).... but then the video functions properly. Once it's running my postMessage-based calls to seekTo definitely work, haven't tested others.
It looks it's only a Chrome security system to block repeated requests, using CORB.
https://www.chromestatus.com/feature/5629709824032768
In my case, YouTube was blocking Access after the first load of the same webpage which has many video API data request, high payload.
For pages with low payload, the issue does not occur.
In Safari and other non Chronuim based browsers, the issue does not occur.
If I load the webpage in a new browser, the issue does not occur, when I reload the same page, the issue appears.
In some cases (as one commenter mentioned) this might be caused if you are moving the player within DOM, like append or etc..
This helped me (with Vue.js)
Found here vue-youtube
mounted() {
window.YTConfig = {
host: 'https://www.youtube.com/iframe_api'
}
const host = this.nocookie ? 'https://www.youtube-nocookie.com' : 'https://www.youtube.com'
this.player = player(this.$el, {
host,
width: this.width,
height: this.height,
videoId: this.videoId,
playerVars: this.playerVars
})
...
}
UPDATE:
Working like a charm like this:
...
youtube(
video-id="your_video_code_here"
nocookie
)
...
data() {
return {
playerVars: {
origin: window.location.href,
},
};
},
I think the description of the error is misleading and has originally to do with wrong usage of the player object.
I had the same issue when switching to new Videos in a Slider.
When simply using the player.destroy() function described here the problem is gone.
I had this same problem and it turns out it was because I had the Chrome extension "HTTPS Everywhere" running. Disabling the extension solved my problem.
This exact error was related to a content block by Youtube when "playbacked on certain sites or applications". More specifically by WMG (Warner Music Group).
The error message did however suggest that a https iframe import to a http site was the issue, which it wasn't in this case.
You could change your iframe to be like this and add origin to be your current website. It resolves error on my browser.
<iframe class="test-testimonials-youtube-group" type="text/html" width="100%" height="100%"
src="http://www.youtube.com/embed/HiIsKeXN7qg?enablejsapi=1&origin=http://localhost:8000"
frameborder="0">
</div>
ref: https://developers.google.com/youtube/iframe_api_reference#Loading_a_Video_Player
Just wishing to avoid the console error, I solved this using a similar approach to Artur's earlier answer, following these steps:
Downloaded the YouTube Iframe API (from https://www.youtube.com/iframe_api) to a local yt-api.js file.
Removed the code which inserted the www-widgetapi.js script.
Downloaded the www-widgetapi.js script (from https://s.ytimg.com/yts/jsbin/www-widgetapi-vfl7VfO1r/www-widgetapi.js) to a local www-widgetapi.js file.
Replaced the targetOrigin argument in the postMessage call which was causing the error in the console, with a "*" (indicating no preference - see https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage).
Appended the modified www-widgetapi.js script to the end of the yt-api.js script.
This is not the greatest solution (patched local script to maintain, losing control of where messages are sent) but it solved my issue.
Please see the security warning about removing the targetOrigin URI stated here before using this solution - https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
Patched yt-api.js example
Adding origin=${window.location.host} or "*" is not enough.
Add https:// before it and it will work.
Also, make sure that you are using an URL that can be embedded: take the video ID out and concatenate a string that has the YouTube video prefix and the video ID + embed definition.
I think we could customize the sendMessage of the YT.Player
playerOptions.playerVars.origin = window.location.origin or your domain.
this.youtubePlayer = new YT.Player(element,playerOptions);
this.youtubePlayer.sendMessage = function (a) {
a.id = this.id, a.channel = "widget", a = JSON.stringify(a);
var url = new URL(this.h.src), origin = url.searchParams.get("origin");
if (origin && this.h.contentWindow) {
this.h.contentWindow.postMessage(a, origin)
}
}
I used this function to resolve in my project.
Extending #Hokascha's answer above it was also lazy loading for me being automatically added by WordPress. This code will remove all lazy loading on the site's iframes (add to functions.php):
function disable_post_content_iframe_lazy_loading( $default, $tag_name, $context ) {
if ( 'iframe' === $tag_name ) {
return false;
}
return $default;
}
add_filter('wp_lazy_loading_enabled', 'disable_post_content_iframe_lazy_loading', 10, 3);
I got a similar error message in my attempt to embed a Stripe pricing table when:
Adding the embed code via PHP through a custom WordPress short code
Or by appending the code to the page dynamically with JavaScript (Even a using a setTimeout() delay to ensure the DOM was loaded didn't work).
I was able to solve this on my WordPress site by adding the code to the WordPress page itself using plain html code in the block editor.
mine was:
<youtube-player
[videoId]="'paxSz8UblDs'"
[playerVars]="playerVars"
[width]="291"
[height]="194">
</youtube-player>
I just removed the line with playerVars, and it worked without errors on console.
You can try :
document.getElementById('your_id_iframe').contentWindow.postMessage('your_message', 'your_domain_iframe')
I was also facing the same issue then I visit official Youtube Iframe Api where i found this:
The user's browser must support the HTML5 postMessage feature. Most modern browsers support postMessage
and wander to see that official page was also facing this issue. Just Visit official Youtube Iframe Api and see console logs. My Chrome version is 79.0.3945.88.
I have an issue with Greasemonkey, it doesn't update my script automatically (probably because we don't want to add it to its UserScripts root, and it seems in this case it doesn't update it)...
anyway, I was adding a piece of code (main idea from here) to my script to check the script version inside the script and let user know if there is a new version available, and as if user wants to update it, if so it should open a new window/tab for script url (that it should trigger Greasemonkey to install it)... this is my senario, and it works perfect up to the point that it should open a new window/tab...
here you can see the function I'm using:
function checkForUpdate(in_vid){
var plugin_url = 'https://MyWebSiteURL/MonaTest.user.js?'+new Date().getTime();
if ((parseInt(GM_getValue('SUC_last_update', '0')) + 86400000 <= (new Date().getTime()))){
try {
GM_xmlhttpRequest( {
method: 'GET',
url: plugin_url,
headers: {'Cache-Control': 'no-cache'},
onload: function(resp){
var local_version, remote_version, rt, script_name;
rt=resp.responseText;
GM_setValue('SUC_last_update', new Date().getTime()+'');
remote_version = parseFloat(/#version\s*(.*?)\s*$/m.exec(rt)[1]);
local_version = parseFloat(GM_getValue('SUC_current_version', '-1'));
if(local_version!=-1){
script_name = (/#name\s*(.*?)\s*$/m.exec(rt))[1];
GM_setValue('SUC_target_script_name', script_name);
if (remote_version > local_version){
if(confirm('There is an update available for the Greasemonkey script "'+script_name+'."\nWould you like to install it now?')){
-------> GM_openInTab(plugin_url);
//window.open(plugin_url,'_blank')
//location.assign(plugin_url);
GM_setValue('SUC_current_version', remote_version);
}
}
else{
GM_log('No update is available for "'+script_name+'"');
}
}
else{
GM_setValue('SUC_current_version', remote_version+'');
}
}
});
}
catch (err){
GM_log('An error occurred while checking for updates:\n'+err);
}
}
}
I tried to use GM_openInTab, but it returns this error in the console:
Timestamp: 9/27/12 9:55:33 AM
Error: ReferenceError: GM_openInTab is not defined
Source File: file:///Users/Mona/Library/Application%20Support/Firefox/Profiles/tonwb5lg.default/gm_scripts/MonaTest/MonaTest.user.js
Line: 97
I couldn't find any reference to indicate that GM_openInTab doesn't support anymore!
I tried other solutions, using window.open and location.assign... both of them doesn't work because they shows the script source codes without triggering Greasemonkey to install it...
I don't know if there is a way to update script using this method...
I would appreciate if you share your knowledge and help me with my problem.
Thanks for your time!
P.S. My firefox version is 15.0.1, Greasemonkey version is 1.1
don't forget to #grant.
correct me if im wrong, but your script does not end with js.
var plugin_url = 'https://MyWebSiteURL/MonaTest.user.js?'+new Date().getTime();
try forcing the .js extension.
when i added the date to my script, GM stopped installing it.
remove the date at the end and give it a try.
one last thing: you're basing your script on a script from 2009. take a look at a new one, like this from 2011.
I just found out that the Screen Capture by Google extension makes my website's window.onresize event not fire.
I want to perform a javascript check to see if the user has ScreenCapture installed and if so, warn the user of the problem.
A year ago I think I heard of some javascript code that could do this, maybe using some google API, but I don't remember.
Any insight on this? I haven't developed any extensions so I don't really know how they work.
[EDIT]
So I have been asked to show some code. As seen in my previous question ( window.onresize not firing in Chrome but firing in Chrome Incognito ), the problem occurs on any window.onresize event function, so I don't think my code really matters.
Also, there is quite a lot of my code, I don't know how much of it to paste or if it would be helpful.
var debounce = function (func, threshold, execAsap)
{
var timeout;
return function debounced () {//alert("1.1 Y U NO WORK?");
var obj = this, args = arguments;
function delayed () {
if (!execAsap)
func.apply(obj, args);
timeout = null;
}
if (timeout)
clearTimeout(timeout);
else if (execAsap)
func.apply(obj, args);
timeout = setTimeout(delayed, threshold || 100);
};
};
window.onresize = debounce(function (e) { //alert("1.2 Y U NO WORK?");
flag = true;
var point = window.center({width:1,height:1});
doCenter(point);
// does something here, but only once after mouse cursor stops
}, 100, false);
I would like to stress that the problem is not due to the debounce. window.onresize = t; function t (e) { alert("wtf?");} won't work either.
[EDIT2]
Here's the result:
var screenCapture = null;
var screenCaptureImg = document.createElement("img");
screenCaptureImg.setAttribute("src", "chrome-extension://cpngackimfmofbokmjmljamhdncknpmg/images/arrow.png");
/*
* Add event listeners for both "load"- and "error"-event
* Set the variable showing the existence of the extension by
* setting it to "true" or "false" according to the fired event
*/
screenCaptureImg.addEventListener("load", doLoad, false);
function doLoad(e){
screenCapture = true; //removeImgTag(e);
alert("I've so cleverly detected that your Chrome has the ScreenCapture extension enabled. \n\nThis extension interferes with my website's DOM and long story short, it won't be able to scale properly.\n\nSo please disable it. \nConsider this extension: \"Disable All Extensions Plus\", it's a handy selective disabler.");
}
screenCaptureImg.addEventListener("error", function(e){
screenCapture = false; //removeImgTag(e);
}, false);
/*
function removeImgTag(e) {
e.currentTarget.parentNode.removeChild(e.currentTarget);
}
*/
Note that I couldn't get removeImgTag to work, because (at least in chrome), I don't seem to have access to the document object in order to create or remove elements from my page, from within these event functions. This is also why I'm displaying an alert instead of elegantly writing up a document.getElementById("something").innerHTML=...
To detect if an extension is installed in Chrome, you can check for a known resource included in the extension such as an image. Resources for the extension are referenced using the following URL pattern:
chrome-extension://<extensionID>/<pathToFile>
The basic detection technique involves creating a hidden image tag and attaching load and error events to it to see if the image loads (as described here for Firefox):
extensionImg.setAttribute("src", "chrome-extension://<INSERT EXTENSION ID HERE>/images/someImage.png"); // See below for discussion of how to find this
/*
* Add event listeners for both "load"- and "error"-event
* Set the variable showing the existence of the extension by
* setting it to "true" or "false" according to the fired event
*/
extensionImg.addEventListener("load", function(e) {
extensionExists = true;
removeImgTag(e);
}, false);
extensionImg.addEventListener("error", function(e) {
extensionExists = false;
removeImgTag(e);
}, false);
function removeImgTag(e) {
e.currentTarget.parentNode.removeChild(e.currentTarget);
}
Check the installation directory of the extension in the Chrome configuration to find a likely target for detection. On my Linux workstation extensions are located in:
~/.config/chromium/Default/Extensions
You can see that I have 3 extensions installed right now:
~/.config/chromium/Default/Extensions$ ls
cpecbmjeidppdiampimghndkikcmoadk nmpeeekfhbmikbdhlpjbfmnpgcbeggic
cpngackimfmofbokmjmljamhdncknpmg
The odd looking names are the unique IDs given to the extension when it is uploaded to the Chrome webstore. You can obtain the ID either from the webstore or by going to the Extensions tab (wrench -> Extensions) and hovering over the link to the extension in question, or "Screen Capture (by Google)" in this case (note the asterisked extension ID):
https://chrome.google.com/webstore/detail/**cpngackimfmofbokmjmljamhdncknpmg**
In the extension directory there will be one or more versions; you can ignore this. Within the version directory is the actual content of the extension:
~/.config/chromium/Default/Extensions/cpngackimfmofbokmjmljamhdncknpmg/5.0.3_0$ ls
account.js images page.js sina_microblog.js
ajax.js isLoad.js picasa.js site.js
background.html _locales plugin style.css
editor.js manifest.json popup.html ui.js
facebook.js notification.html sha1.js upload_ui.js
hotkey_storage.js oauth.js shortcut.js
hub.html options.html showimage.css
i18n_styles page_context.js showimage.html
In the case of the Screen Capture extension there are a number of images to use:
~/.config/chromium/Default/Extensions/cpngackimfmofbokmjmljamhdncknpmg/5.0.3_0/images$ ls
arrow.png icon_128.png icon_save.png print.png
copy.png icon_16.png line.png region.png
cross.png icon_19.png loading.gif screen.png
custom.png icon_32.png loading_icon.gif sina_icon.png
delete_account_icon.png icon_48.png mark.png toolbar_bg.png
down_arrow.png icon_close.png picasa_icon.png upload.png
facebook_icon.png icon_copy.png popup_bg.jpg whole.png
These can be referenced under this URL:
chrome-extension://cpngackimfmofbokmjmljamhdncknpmg/images/arrow.png
This technique obviously depends on the stability of the content of the extension. I recommend using an image that looks likely to remain through all versions.
As mentioned above, the same technique can be used to detect Firefox extensions. In this case the content URL looks like this:
chrome://<EXTENSION NAME>/content/<PATH TO RESOURCE>
On my Linux workstation Firefox extensions are located in:
~/.mozilla/firefox/<USER PROFILE ID>/extensions
Where <USER PROFILE ID> looks something like this: "h4aqaewq.default"
You can see that I have 2 extensions installed right now, one of which is a directory installation and the other of which is a XPI (pronounced "zippy") file:
~/.mozilla/firefox/h4aqaewq.default/extensions$ ls
{3e9a3920-1b27-11da-8cd6-0800200c9a66} staged
firebug#software.joehewitt.com.xpi
The "staged" directory is where Firefox keeps extensions that will be updated (I think). The GUID directory with the brackets is a directory-based extension installation, and the .xpi file is Firebug.
Note: XPI is going away (see the link above). It's basically a zip file that can be opened and inspected by anything that understands zip. I used Emacs.
Finding the extension ID in Firefox is a bit more involved. Go to "Tools -> Add-ons", click the Extensions tab, click the "More" link next to the extension description, then click the "reviews" link to go to the Firefox extension site and get the ID from the URL (note the asterisked extension ID):
https://addons.mozilla.org/en-US/firefox/addon/**firebug**/reviews/?src=api
There's probably an easier way to do this; suggestions welcome.
TODO: how to find a likely image in a Firefox extension.
As an extra note, in Chrome you can only communicate with an extension via the shared DOM of the page: Host page communication