I have a very basic page that displays a dynamic image. Here is my very simple code:
<html>
<body>
<p><img width=1024 height=768 src="../image/someImage.jpg"></p>
</body>
</html>
The image gets refreshed every minute by another program. The issue is that occasionally the html page will not display the updated image on anyone's computer, so it isn't a local cache issue. I am using IIS6. The only way to get it to display the updated image is by stopping and starting IIS for that site.
My company only uses IE, but I tried looking at it in FireFox as well and it did the same.
For a quick fix, append a question mark and a random number to the end of the image path. PHP Example:
<img src=".../images/someImage.jpg?<?=rand(1,100000)?>">
The real root of the problem could be expiration headers. You may want to configure the headers for images to expire sometime in the past. Google around for expiration headers.
Try to disable IIS7 cache:
Start IIS Manager (type IIS into search programs and files in start menu)
Navigate to desired site in the Connections tree (Default Web Site)
Open Output Caching
Edit Feature Settings
Uncheck Enable cache and Enable kernel cache
Related
I am trying to run a small website from my tablet with Termux and Ngnix. The nginx.conf file has been properly configured, and the webpages have been placed in the correct folder. The problem is that when I make changes to the html code, the nginx server doesn't seem to want to update with the new changes.
For example, I had a thumbnail image that would open in a new tab for viewing at full size when clicked. I later changed the html code so the same thumbnail image would open up a page on the site with related text info. I made sure to stop the server before applying any changes to my code, and then restarting the server after the appropriate changes were made. Unfortunately, the server keeps displaying the pages before the changes. It's like the original pages are stuck somewhere in the server's "memory" and don't want to update. Does anyone have any ideas as to what I'm doing wrong? This is getting really frustrating.
Thank you in advance to any who can help me.
Seems the issue was with the browser and not Nginx. I cleared the data from the browser, restarted, and haven't had any issues since. Strange, but it worked.
Currently, I am facing an issue with HTML page. So here if a user visited the site then the browser is caching the entire HTML page. So when the user hits the URL again then the browser taking that HTML from the cache instead of calling/requesting to the server for HTML contents. Here our Team member forgot to add meta tags which would force the browser to take content from Server each time. Is there any way that we could resolve the issue? Since the page request itself not reaching the server so User will not see the refresh contents of the website. If user do Ctrl+F5 then they can see updated contents. I went through many sites and stack overflow questions but I did find a solution for forcing HTML page to load contents from server using meta tags.But existing users is there any resolution that we could apply?
Problem is here the page did not call server to get contents it just loads from cache.
There's nothing you can do.
You've previously instructed the browser to cache the file (presumably for a long time) and not check for updates (via ETags or If-Modified-Since) so it is going to use the cached version until its cache expires (from the user intervening or automatically (which might be sooner than your caching instructions said)).
There's no way to provide new caching instructions to the browser without it requesting them from the server (which it won't do because of the existing rules).
I have a wordpress site: carlscholl.com
I am running into a problem where the homepage is not updating when I initially go to the address. Here is a screenshot of the initial loading of my site:
https://imgur.com/th4iMSr
Here is another screen shot when I refresh the page. As you can see, I removed the picture of the piggy bank causing the site to be insecure. I replaced it with same image as the other post.
https://imgur.com/HjT6YwV
Does anyone know why the site is not updating when I initially go to it?
It might be related to DNS for the domain or caching. After looking into your website, I did not find any image at the moment, however, I noticed that your website is loading from Cloudflare. Usually, Cloudflare caches the images so, even if you remove it from the website, it can take some time for it to be gone. However, you can still clear the cache from the Cloudflare Dashboard by the "Purge Cache" option.
Another thing that I noticed that your website is not automatically redirecting to https:// by default. As you mentioned "removing the piggy bank image caused the site to insure", it might not be the case and you can enable auto SSL redirection from the Cloudflare Dashboard > SSL/TLS > Edge Certificates > Always Use HTTPS
So basically, the site not updating or the image not loading issue should be resolved automatically after some time or you can purge the cache for that image specifically (from Cloudflare) to speed it up.
I´m creating a static web page with HTML and CSS, the problem comes when I upload new info into the server. When I try to reload the page nothing changes. It only changes when I make a ctrl f5 reload. Is there a way to make the site to reload itself so the user can see the newest info every time they enter the web site?
I tried using a "?" sing ager calling the CSS file but it's not working
link href="CSS/styles.css?v=1.1" rel="stylesheet"
Static content is cached by the browser. If the server sends a max-age then the browser will not attempt to get a new version unless the cache is expired as per the max age.
However ctrl-F5 forces a refresh disregarding the aging parameters.
You can try setting a shorter max-age on the server, but that will cause more load as the clients will fetch resources more frequently.
Most likely, your browser is caching the content of your website when you visit it.
The next time you visit, it'll show the native, cached copy (unless you "hard-refresh" it eg(Ctrl + F5)).So you need "Cache Busting"
You can follow this article, it may help you.
https://css-tricks.com/strategies-for-cache-busting-css/
Thank You...
I have an appcache (with NETWORK *). So now I visit my page with <html manifest="/cache.appcache">. Then the page itself is cached as all the images are. But I want the page self to not be cached. How can I do this? I thought NETWORK * would do the trick.
Regards,
Kevin
The appcache manifest always caches the master page.
If you are using Chrome check the cached files for your page here: chrome://appcache-internals
A workaround could be to put a hidden iframe somewhere on your page, which contains the appcache file to cache offline content. (take a look at "Preventing the application cache from storing masters with an iframe" here: http://labs.ft.com/2012/11/using-an-iframe-to-stop-app-cache-storing-masters/ )
A better solution could be to write your page to fetch new content from your server when it is opened - if the server cannot be reached, it can serve the last known content from the HTML5 local storage.
I have tried the iframe work around, and find it ripe with errors. Most browsers cache the data for the iframe where the page cannot get it.
Instead make the page's content load via AJAX. Basically have a blank html page with the manifest and javascript which pulls and adds its content from the server. This way only the blank html is cached, and content is always updated from the server.
Converting a page to this method can be very difficult, but it works. Making sure the appropriate javascript gets run at the correct time, probably requires some detangling. Moving around server code which won't be called when pulling from cache to the new ajax method.
Note: no need to pull conditional content from the server if the condition is in the query string, different query strings make a separate cache