I'm working on an ASP.Net MVC application, running on .Net Framework 4.6.2. The application is currently deployed to a server with IIS 10.
Everything was working fine, until recently, we added some video (mp4) files into the website. Now, whenever staffs from our company browses the website and open up a video, and browse away to another page on the website before the video is completely played, the website no longer loads correctly for that user's browser.
If the video is fully streamed to the browser, then everything works as expected afterwards.
The videos are served with the HTML5 video tag, directly pointing to a physical file on the server, without any other JavaScript library:
<video src="video.mp4" controls controlslist="nodownload" disablepictureinpicture oncontextmenu="return false;" />
Note that the same behaviour happens if we directly browse to the video (browsing the src URL directly).
From IIS, I found that once a video begins to stream to a browser, if the video is not fully streamed before the user browse away, in subsequent requests there will always be a few static content files that will be stuck in SendResponse state. This causes the browser to be unable to render the page normally, giving the impression that the page would not load.
These static content files are all served with Bundling feature in ASP.Net MVC. Note that not all bundles are not able to be loaded, only some, and those are the bigger bundles of the bunch, but not necessarily the largest. Browser will eventually receive an ERR_HTTP2_PROTOCOL_ERROR for each of those static content bundle after a while, in which the items in SendResponse state on the IIS server will go away.
Strangely, incognito mode and non-incognito mode does not seem to affect one another: if user opens up a video and no longer be able to browse any page on the website in incognito mode, they can still browse the site just fine in non-incognito mode, until they browse to a video in the non-incognito mode.
The same behaviour applies to both Chrome and MS Edge in all the PCs we've tested in our company.
However, the same does not occur to our mobile devices, or our own devices at home.
Failed Request Tracing shows no error. Everything is returning code 200. Filtering the trace to code 400 and above tracked nothing.
I'm at a loss what other methods should I use to continue troubleshooting. Any pointer is greatly appreciated.
After some investigations and trial and errors, it was finally found that the culprit is the antivirus software. A ticket was submitted to the antivirus software company, and they acknowledged that it was their issue and released a hotfix.
Applying the hotfix resolved the problem.
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I have an ASP.NET Core 3.1 Blazor Server-Side Application.
Recently a user has complained, that it does not work with the TOR Browser.
So I tried it out and had to find out, it works in only ~50% of all cases.
Every time I tried, I requested a new circuit for the request.
When it worked, everything was fine and even the speed was not that bad.
But if not, first, the tab is loading the source, showing the favicon and then nothing happens for a while.
Sometimes, if you are patient enough it looks like the first render happens, but the second and so on for all the async operations never happens.
Is there a difference between the TOR nodes, that prevents Blazor pages from working properly?
Tor by default blocks javascript, which blazor signalR is based on, so it can't effectively communicate with the server, disable noscript.
Also k
We have a ColdFusion Server running on top of IIS. All of our pages can be viewed in desktop or mobile mode, which just changes some CSS around but shows essentially the same page. We've run into an odd situation where on one particular page of the site:
It works fine on a PC viewing the page in desktop mode
It works fine on a PC viewing the page in mobile mode
It returns a err_connection_reset on any mobile device viewing the page in mobile mode
What could cause one particular page on a website to show up fine in desktop browsers but return an err_connection_reset on mobile browsers.
This page is not large, and is made up mostly of common components that are used on other pages which are working fine. No error appears in the server logs (our own, ColdFusions, or IIS').
Google keeps returning me pages about problems with Chrome's data saver mode on pages with 302 redirections. However, this page does not redirect, and we've experienced this on Chrome, Safari, and the Android browser, on both Android and iOS devices.
After yet another reboot of my macbook, chrome stopped loading my webapp.
It returns literally nothing in browser window and the only thing i managed to find is that requests in chrome's timeline has status "cancelled".
If I'm trying to get there from another website (by changin url and hitting "return" button), it also does nothing, it doesn't even try to reload page.
Other browsers load it fine atm.
I've received this report from a user about couple of weeks ago, but now i've got it myself, so I assume the problem is in my server.
Recently, i've found that my android phone also can't access the website from chrome browser. The behaviour is the same. However, android default browser has access.
What could that be? Where should i look?
I'd provide more information, but there is no error codes or messages of any kind, so i have no idea what information could help in this question.
Also, i have a chrom browser extension (similar to Pocket), which also is unable to access server. The notable difference is that extension uses Socket.io only.
There were no recent code changes on server side except letsencrypt certificate renewal.
I've tried this:
server restart
different ip/locations (vpn and public access points)
chrome data cleanup / chrome version degrade / chrome reinstallation / chrome canary installation
tried to open server address directly - no difference
I have an audio file I'm trying to serve from a directory within a ASP.NET MVC Web Api Project. For some reason the file refuses to play in Safari or mobile browsers. I can use every other browser to play this file.
What's driving me nuts is that if I just create a Virtual Directory and add the file there then navigate to it like /NewSite/song.m4a it will play fine in safari and mobile.
I thought maybe my web.config was screwing something up so I tried creating another Web Api project hosted in IIS and I still cannot play the audio file in Safari or mobile browsers in the new app.
I've done everything I can think of. I have the mime type added to my site. Other browsers like firefox and chrome play the file fine.
Has anyone seen this behavior? I'm going insane here.
I seriously wasted an entire day on this.
My IIS server is using a self signed cert. I was trying to load the audio file through https.
apparently every other browser is cool with this except Safari and mobile browsers.
I changed the src attribute to be http instead of https and safari started working as well as my iOS simulator.
I think this should be releated to IIS settings but don't know exactly what it is.
As you can see below, this login message pops up for each images, 8 images 8 times in Opera.
And the major browsers react to this page different.
IE9 works good(this is the reason why I found this problem now. It's internal site and almost every users use IE...)
Chrome(17.0.963.56 m) works good.
Safari(5.1.2) is also good.
Opera 11.61 has a problem like I said...
And FF SHOWS NO IMAGES and don't even ask for login. And Firebug says it's "NetworkError: 404 Not Found!".
I don't know what's going on.
This site requires to login and it's internal, so I can't give you the link. Sorry for the inconvenient.
And this site is running on Windows Server 2003. And the image containing folder is shared for web(I don't know why it's shared. But don't want to change the setting). I don't know this may cause this situation.
If Opera opens a user name/password dialog, the site is probably sending a WWW-Authenticate header in response to those image requests. You can open Opera's developer tools ("Tools > Advanced > Opera Dragonfly" or right-click in page and select "Inspect element") and use the network feature to inspect the full headers.
I don't know how you can disable this header if it is sent, it depends on the server settings and what type of server you're running, and I'm not at all familiar with Windows Server 2003.