There is a bunch of images in a web page.
Other browsers do download them correctly, but Chrome doesn't.
In the developer's console, it shows the following message for each image:
Failed to load resource
As mentioned before, problem appears only in Chrome.
What is it?
I recently ran into this problem and discovered that it was caused by the "Adblock" extension (my best guess is that it's because I had the words "banner" and "ad" in the filename).
As a quick test to see if that's your problem, start Chrome in incognito mode with extensions disabled (ctrl+shift+n) and see if your page works now. Note that by default all extensions will be already disabled in incognito mode unless you've specifically set them to run (via chrome://extensions).
Check the network tab to see if Chrome failed to download any resource file.
In case it helps anyone, I had this exact same problem and discovered that it was caused by the "Do Not Track Plus" Chrome Extension (version 2.0.8). When I disabled that extension, the image loaded without error.
There is also the option of turning off the cache for network resources. This might be best for developing environments.
Right-click chrome
Go to 'inspect element'
Look for the 'network' tab somewhere at the top. Click it.
Check the 'disable cache' checkbox.
Kabir's solution is correct. My image URL was
/images/ads/homepage/small-banners01.png,
and this was tripping up AdBlock. This wasn't a cross-domain issue for me, and it failed on both localhost and on the web.
I was using Chrome's network tab to debug and finding very confusing results for these specific images that failed to load. The first request would return no response (Status "(pending)"). Later down the line, there was a second request that listed the original URL and then "Redirect" as the Initiator. The redirect request headers were all for this identical short line of base64-encoded data, and each returned no response, although the status was "Successful":
GET data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAACklEQVR4nGMAAQAABQABDQottAAAAABJRU5ErkJggg== HTTP/1.1
Later I noticed that these inline styles were added to all the image elements:
display: none !important;
visibility: hidden !important;
opacity: 0 !important;
Finally, I did not receive any "failed to load resource" messages in the console, but rather this:
Port error: Could not establish connection. Receiving end does not exist.
If any of these things is happening to you, it probably has something to do with AdBlock. Turn it off and/or rename your image files.
Also, because of the inline CSS created by AdBlock, the layout of my promotions slider was being thrown off. While I was able to fix the layout issues with CSS before finding Kabir's solution, the CSS was somewhat unnecessary and affected the flexibility of the slider to handle images of multiple sizes.
I guess the lesson is: Be careful what you name your images. These images weren't malicious or annoying as much as they were alerting visitors to current promotions and specials in an unobtrusive way.
If the images are generated via an ASP Response.Write(), make sure you don't call Response.Close();. Chrome doesn't like it.
I was getting this error, only in Chrome (last version 24.0.1312.57 m), and only if the image was larger than the html img. I was using a php script to output the image like this:
header('Content-Length: '.strlen($data));
header("Content-type: image/{$ext}");
echo base64_decode($data);
I resolved it adding 1 to the lenght of the image:
header('Content-Length: '.strlen($data) + 1);
header("Content-type: image/{$ext}");
echo base64_decode($data);
Appears that Chrome dont expect the correct number of bytes.
Tested with sucess in Chrome and IE 9. Hope this help.
Facts:
I have disabled all plugins, and the problem still remains.
There are some sites, where the problem does not occour.
It's a known issue. See Issue 424599: Failed to load resource: net::ERR_CACHE_MISS error when opening DevTools on PHP pages and Stack Overflow question Bizarre Error in Chrome Developer Console - Failed to load resource: net::ERR_CACHE_MISS.
There is a temporary work around in Reenable (temporary) showModalDialog support in Chrome (for Windows) 37+.
Basically, create a new string in the registry at
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome\EnableDeprecatedWebPlatformFeatures
Under the EnableDeprecatedWebPlatformFeatures key, create a string value with the name 1 and a value of ShowModalDialog_EffectiveUntil20150430. To verify that the policy is enabled, visit chrome://policy URL.
FYI - I had this issue as well and it turned out that my html listed the .jpg file with a .JPG in caps, but the file itself was lowercase .jpg. That rendered fine locally and using Codekit, but when it was pushed to the web it wouldn't load. Simply changing the file names to have a lowercase .jpg extension to match the html did the trick.
In Chrome (Canary) I unchecked "Appspector" extension. That cleared the error.
I updated my Chrome browser to the latest version and the issue was fixed.
It is due to ad-blocker.When project files names contains words like 'ad' then ad-blockers also block theses files to load.
Best solution is that never save any files with these name keys.
Removing the / from the path helped me to solve this problem.
See more at:
Failed to load resource: net::ERR_FILE_NOT_FOUND loading json.js
Related
I use google chrome for my php/js development.
today I started to see a file that is failing to load.
file name is always different
Request URL: blob:http://random.homestead.test/4d9f984b-b8f8-4e77-97cb-4fcfd8ace348
network page says that initiator is inject.preload.js:373
if I open this file, the first line says
/*
*This file is part of Adblock Plus <https://adblockplus.org/>,
But I have Adblock Plus disabled. I noticed that file is being loaded with success occasionally. And also noticed that this file is only requested when I have AdBlock (not AdblockPlus) active. If I have AdBlock disabled - no problem. but even if I exclude my dev site from adblock - the file download is still failing.
My question is: How can I get rid of this red line in my console log and network without entirely deactivating adblock?
I tried it on stackoverflow.com and I see the same file inject.preload.js loading same randomly named file and succeeding. the file header says:
/*
* Frame context wrapper
*
* For some edge-cases Chrome will not run content scripts inside of frames.
* Website have started to abuse this fact to access unwrapped APIs via a
* frame's contentWindow (#4586, 5207). Therefore until Chrome runs content
* scripts consistently for all frames we must take care to (re)inject our
* wrappers when the contentWindow is accessed.
*/
it started today on 14 of June 2018
Looks like it is officially broken. The issue is ticketed at https://issues.adblockplus.org/ticket/6744
I tried to debug and find the exact cause, but the issue seems to be elsewhere.
The JS code debugged (inject.preload.js at line 373)
document.documentElement.appendChild(script); // here, script.src is indeed a valid script
document.documentElement.removeChild(script);
URL.revokeObjectURL(url);
The script's src attribute targets a valid blob JS which is alive when this line is called!
the ticket is on review and they working on it.
Now you can add the entire test site to your trusted sites
I installed an older version of Chrome and I solved the problem.
https://www.slimjet.com/chrome/google-chrome-old-version.php
If you have any adBlocker then remove or pause for that specific page adBlocker, it worked for me i had the same issue with JavaScript Application when fetching data from Firestore.
In the comment https://issues.adblockplus.org/ticket/6744#comment:17 , you can find a link to build list https://downloads.adblockplus.org/devbuilds/adblockpluschrome/, install the development version "Adblock Plus for Google Chrome and Opera 3.1.0.2069" and the error won't display anymore
updated
On 2018.7.17 the new verison with bug fixed is released on chrome webstore. So this issue is automatically resolved.
Every other website I visit, the inspector works as expected:
But in many of the sites I'm editing within apache server (using xampp) somehow they doesn't show the "filename.css:lineNumber" data
Also, every change I try to do in the inspector in thse sites, doesn't do anything to the code shown in the source tab.
I've tried refreshing, hard refreshing with cache, closing and opening the tab, closing and opening chrome again. The same problem occurs.
In other sites the inspector works well, but not in many of the localhost sites.
Has someone experienced this before? Is there a way to fix this?
If you are using a client-side CSS generator library such as Lea Verou's excellent -prefix-free or client-side Less, you will not see source information as it has all been processed and reinjected as style elements.
Client-side Less has a property [dumpLineNumbers] to include source line info as a comment in the generated source. (I'm not sure if this will display in Chrome's inspector - but I think it might)
The only "fix" I know of for -prefix-free is to temporarily remove it, obtain the source info for reference, then put it back in.
I have had the exact same problem (not using a css generator), and it appears to be a known bug with the current version of Chrome, the solution is to use the more up to date Beta version known as Chrome Canary - Here's the link :)
https://www.google.co.uk/intl/en/chrome/browser/canary.html
Try to check what the format of your CSS file is. I had the same trouble with the UNIX and Macintosh formats. For example, try to open you CSS file in Notepad++ and in the bottom right corner of the window you'll see your current format. If you see UNIX or Macintosh there, click it with the right button of your mouse and change to DOS/Windows. Then save your file and refresh your page in Chrome. It definitely helped in my case.enter image description here
In both image and script tags.
My understanding was that you can access both scripts and images on other domains. So when does one use this attribute?
Is this when you want to restrict the ability of others to access your scripts and image?
Images:
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-crossorigin
Scripts:
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script
The answer can be found in the specification.
For img:
The crossorigin attribute is a CORS settings attribute. Its purpose is to allow images from third-party sites that allow cross-origin access to be used with canvas.
and for script:
The crossorigin attribute is a CORS settings attribute. It controls, for scripts that are obtained from other origins, whether error information will be exposed.
This is how we have successfully used crossorigin attribute it in a script tag:
Problem we had: We were trying to log js errors in the server using window.onerror
Almost all of the errors that we were logging had this message : Script error. and we were getting very little information about how to solve these js errors.
It turns out that the native implementation in chrome to report errors
if (securityOrigin()->canRequest(targetUrl)) {
message = errorMessage;
line = lineNumber;
sourceName = sourceURL;
} else {
message = "Script error.";
sourceName = String();
line = 0;
}
will send message as Script error. if the requested static asset violates the browser's same-origin policy.
In our case we were serving the static asset from a cdn.
The way we solved it was adding the crossorigin attribute to the script tag.
P.S. Got all the info from this answer
CORS-enabled images can be reused in the element without being tainted. The allowed values are:
The page already answers your question.
If you have a cross-origin image you can copy it into a canvas but this "taints" the canvas which prevents you from reading it (so you cannot "steal" images e.g. from an intranet where the site itself doesn't have access to). However, by using CORS the server where the image is stored can tell the browser that cross-origin access is permitted and thus you can access the image data through a canvas.
MDN also has a page about just this thing: https://developer.mozilla.org/en-US/docs/HTML/CORS_Enabled_Image
Is this when you want to restrict the ability of others to access your scripts and image?
No.
If you're developing a quick piece of code locally, and you're using Chrome, there's a problem. if your page loads using a URL of the form "file://xxxx", then trying to use getImageData() on the canvas will fail, and throw the cross-origin security error, even if your image is being fetched from the same directory on your local machine as the HTML page rendering the canvas. So if your HTML page is fetched from, say:
file://D:/wwwroot/mydir/mytestpage.html
and your Javascript file and images are being fetched from, say:
file://D:/wwwroot/mydir/mycode.js
file://D:/wwwroot/mydir/myImage.png
then despite the fact that these secondary entities are being fetched from the same origin, the security error is still thrown.
For some reason, instead of setting the origin properly, Chrome sets the origin attribute of the requisite entities to "null", rendering it impossible to test code involving getImageData() simply by opening the HTML page in your browser and debugging locally.
Also, setting the crossOrigin property of the image to "anonymous" doesn't work, for the same reason.
I'm still trying to find a workaround for this, but once again, it seems that local debugging is being rendered as painful as possible by browser implementors.
I just tried running my code in Firefox, and Firefox gets it right, by recognising that my image is from the same origin as the HTML and JS scripts. So I'd welcome some hints on how to get round the problem in Chrome, as at the moment, while Firefox works, it's debugger is painfully slow, to the point of being one step removed from a denial of service attack.
I've found out how to persuade Google Chrome to allow file:// references without throwing a cross-origin error.
Step 1: Create a shortcut (Windows) or the equivalent in other operating systems;
Step 2: Set the target to something like the following:
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --allow-file-access-from-files
That special command line argument, --allow-file-access-from-files, tells Chrome to let you use file:// references to web pages, images etc., without throwing cross-origin errors every time you try to transfer those images to an HTML canvas, for example. It works on my Windows 7 setup, but it's worth checking to see if it will work on Windows 8/10 and various Linux distros too. If it does, problem solved - offline development resumes as normal.
Now I can reference images and JSON data from file:// URIs, without Chrome throwing cross-origin errors if I attempt to transfer image data to a canvas, or transfer JSON data to a form element.
In both image and script tags.
My understanding was that you can access both scripts and images on other domains. So when does one use this attribute?
Is this when you want to restrict the ability of others to access your scripts and image?
Images:
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-crossorigin
Scripts:
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script
The answer can be found in the specification.
For img:
The crossorigin attribute is a CORS settings attribute. Its purpose is to allow images from third-party sites that allow cross-origin access to be used with canvas.
and for script:
The crossorigin attribute is a CORS settings attribute. It controls, for scripts that are obtained from other origins, whether error information will be exposed.
This is how we have successfully used crossorigin attribute it in a script tag:
Problem we had: We were trying to log js errors in the server using window.onerror
Almost all of the errors that we were logging had this message : Script error. and we were getting very little information about how to solve these js errors.
It turns out that the native implementation in chrome to report errors
if (securityOrigin()->canRequest(targetUrl)) {
message = errorMessage;
line = lineNumber;
sourceName = sourceURL;
} else {
message = "Script error.";
sourceName = String();
line = 0;
}
will send message as Script error. if the requested static asset violates the browser's same-origin policy.
In our case we were serving the static asset from a cdn.
The way we solved it was adding the crossorigin attribute to the script tag.
P.S. Got all the info from this answer
CORS-enabled images can be reused in the element without being tainted. The allowed values are:
The page already answers your question.
If you have a cross-origin image you can copy it into a canvas but this "taints" the canvas which prevents you from reading it (so you cannot "steal" images e.g. from an intranet where the site itself doesn't have access to). However, by using CORS the server where the image is stored can tell the browser that cross-origin access is permitted and thus you can access the image data through a canvas.
MDN also has a page about just this thing: https://developer.mozilla.org/en-US/docs/HTML/CORS_Enabled_Image
Is this when you want to restrict the ability of others to access your scripts and image?
No.
If you're developing a quick piece of code locally, and you're using Chrome, there's a problem. if your page loads using a URL of the form "file://xxxx", then trying to use getImageData() on the canvas will fail, and throw the cross-origin security error, even if your image is being fetched from the same directory on your local machine as the HTML page rendering the canvas. So if your HTML page is fetched from, say:
file://D:/wwwroot/mydir/mytestpage.html
and your Javascript file and images are being fetched from, say:
file://D:/wwwroot/mydir/mycode.js
file://D:/wwwroot/mydir/myImage.png
then despite the fact that these secondary entities are being fetched from the same origin, the security error is still thrown.
For some reason, instead of setting the origin properly, Chrome sets the origin attribute of the requisite entities to "null", rendering it impossible to test code involving getImageData() simply by opening the HTML page in your browser and debugging locally.
Also, setting the crossOrigin property of the image to "anonymous" doesn't work, for the same reason.
I'm still trying to find a workaround for this, but once again, it seems that local debugging is being rendered as painful as possible by browser implementors.
I just tried running my code in Firefox, and Firefox gets it right, by recognising that my image is from the same origin as the HTML and JS scripts. So I'd welcome some hints on how to get round the problem in Chrome, as at the moment, while Firefox works, it's debugger is painfully slow, to the point of being one step removed from a denial of service attack.
I've found out how to persuade Google Chrome to allow file:// references without throwing a cross-origin error.
Step 1: Create a shortcut (Windows) or the equivalent in other operating systems;
Step 2: Set the target to something like the following:
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --allow-file-access-from-files
That special command line argument, --allow-file-access-from-files, tells Chrome to let you use file:// references to web pages, images etc., without throwing cross-origin errors every time you try to transfer those images to an HTML canvas, for example. It works on my Windows 7 setup, but it's worth checking to see if it will work on Windows 8/10 and various Linux distros too. If it does, problem solved - offline development resumes as normal.
Now I can reference images and JSON data from file:// URIs, without Chrome throwing cross-origin errors if I attempt to transfer image data to a canvas, or transfer JSON data to a form element.
I'm trying to provide a link to chrome://newtab (the new tab page) for my distraction-preventing page for when I need to access it, however clicking the link gives the error Failed to load resource.
I've tried:
Linking to it using <a href="chrome://newtab">
Attempting to redirect the user using window.location.
The chrome: prefix aliases to chrome:// but still fails to load.
Does anyone know if this is possible or has any ideas to try?
I am not sure why it doesn't work, but I think it is for security reasons.
Pages on the internet should not have access to local resources and the new tab page is a local resource.
Format your link thusly (also will work with firefox and other tabbed browsers):
Click me
EDIT: of course, that's not actually the new tab page. It's just a blank tab. Going to leave it anyways.
I think you'll have to write a Chrome extension to get access to the chrome://newtab link, it doesn't seem possible for an ordinary webpage to access it.
Edit: This solution no longer works, but I'll leave it for anyone that might try to hunt down why it stopped working.
I finally found that https://www.google.com/_/chrome/newtab will open chrome://newtab, thanks to this post.
Don't ask me why.