As an experienced CMS website operation personnel for information security, I know how troublesome it is when the new content does not display on the front end after the image is updated.This could not only affect the user experience of the website, but could also lead to misguiding content.In content management systems like AnQiCMS, this situation is usually not a system failure, but rather caused by a series of caching mechanisms or configuration issues.

This article will analyze the common reasons why the front-end of AnQiCMS does not update after the image update on the website operation side in detail, and provide a set of systematic troubleshooting and solutions.

Analysis of common reasons why background image updates are not reflected on the front end

When you upload or replace an image on the AnQiCMS backend, but the front-end page still displays the old image or the image cannot be loaded, this is usually related to caching, image processing mechanisms, or file reference paths.Understanding these potential causes helps us locate and solve problems more efficiently.

Browser local cache:This is one of the most common reasons.The user's browser will store the website's images, stylesheets, and other static resources locally to speed up access.After you update the image, the browser may still load the locally stored old image file instead of the latest version on the server.

AnQiCMS system cache:AnQiCMS as an efficient content management system may also have its internal caching mechanism, such as page caching, data caching, etc.These caches sometimes need to be manually cleaned to ensure that the system uses the latest data and files when generating the front-end pages.

CDN (Content Delivery Network) cache:If your website uses CDN services, the CDN server will cache your website's static resources and distribute them to the nearest node to the user.After the image is updated, the old image cache on the CDN node may not be refreshed in time, resulting in the user obtaining the old image from the CDN node.

Server-side cache or reverse proxy cache:Some server configurations (such as Nginx, Apache) may enable their own caching mechanisms, or perform caching when acting as a reverse proxy.These server-level caches may be independent of the CMS system and also need to be cleared for the updated images to take effect.

Image processing mechanism:AnQiCMS provides various image processing features, such as WebP conversion, automatic compression of large images, thumbnail generation, etc. (See document 'Content Settings').If these settings change, or if an exception occurs during processing, it may result in the new image not being generated or stored correctly, which can affect the front-end display.

Image file path or reference error:Although not common, if the path of the image changes after it is uploaded, or if the template file references the image path statically instead of dynamically obtaining it, it may also lead to image loading failure or display errors.

A detailed troubleshooting and handling procedure

In the face of the issue that the front-end images have not been updated, it is recommended that you systematically investigate and handle the following steps:

Step 1: First, clear the local browser cache

This is the simplest and most effective method. Force the browser to download all resources from the server instead of using local cache.

  • For Chrome browser:PressCtrl + Shift + R(Windows) orCmd + Shift + R(macOS) Perform a hard refresh, or open the developer tools (F12), right-click on the refresh button, and select 'Clear cache and reload hardily'.
  • For Firefox browser:PressCtrl + F5(Windows) orCmd + Shift + R(macOS) Perform a hard refresh, or open the developer tools (F12), go to the "Network
  • For Edge browser:PressCtrl + F5. Or open the developer tools (F12), right-click on the refresh button, and select 'Clear cache and reload with cache disabled'.

Refresh the page and then visit your website again to check if the image has been updated.

Step 2: Clear the AnQiCMS system cache

If the image has not been updated after clearing the browser cache, the next step should be to clear the system cache of AnQiCMS itself.AnQiCMS Back-end provides a convenient cache clearing function.

  • Login to the AnQiCMS admin interface.
  • Find and click "Update Cache" or a similar cache management option in the left menu (refer to the document "AnqiCMS Backend Function Introduction").
  • Perform cache cleaning operation. This will clear various cache files generated by the system, forcing AnQiCMS to re-read the latest data from the database and generate the front-end pages.

The page has been refreshed. Please check the image update status.

Step 3: Check and refresh the CDN cache (if CDN service is used)

If your website has enabled CDN service, it is still possible to display old images after clearing the AnQiCMS backend and browser cache, as the CDN cache may not have been updated.

  • Log in to your CDN service provider's console.
  • Find the "Cache Refresh" or "Content Refresh" feature.
  • Select the specific URL path of the image you updated, or if you are unsure of the exact path, you can choose to refresh the entire website's static resource cache.
  • Execute refresh operation and wait a few minutes for the CDN nodes to update.

After completing the CDN refresh, hard refresh the browser page again and check the images.

Step four: Check the server-side cache or restart the application service

For certain server environments, Nginx or Apache may be configured with additional caching rules.Moreover, if the AnQiCMS application itself encounters some status issues, restarting the service may also resolve the problem.

  • Check Nginx/Apache configuration:If you are familiar with server configuration, you can check the configuration files of Nginx or Apache to see if there are any caching strategies for static resources, and try to clear the related caches or restart the service (such assudo systemctl restart nginx).
  • Restart the AnQiCMS application:In some deployment methods (such as Docker deployment or running the executable file directly), simply restarting the AnQiCMS application may help refresh the internal state. According to your deployment method (refer to the documents 'Installation of AnQiCMS', 'Docker Installation of AnQiCMS'), you may need to performstart.shandstop.shScript, or restart the Docker container.

After the operation is completed, refresh the browser page hard again to check the image.

Step five: Use the browser developer tools to check the actual image loading situation

If the image still does not display or displays as a corrupted icon, you need to check whether the image is loaded correctly.

  • Open the browser developer tools (F12).
  • Switch to the “Network” (Network) tab.
  • Hard refresh the page.
  • In the network request list, filter for “Img” type, and find the image file you updated.
  • Check status code:If the status code shows 404 Not Found, it means the image file does not exist on the server or the path is incorrect.
  • Check the image URL:Check whether the actual image URL requested by the browser is consistent with the image path set in the AnQiCMS backend.Copy this URL to open in a new tab and see if it can be accessed normally.
  • Check backend image resources:Log in to the AnQiCMS backend, go to the 'Page Resources' under 'Image Resource Management', find the corresponding image, confirm whether the 'Image Address' is correct, and whether the image itself is normal (refer to the document 'Image Resource Management Help').

If a 404 error is found or the image path does not match, it is likely that the image file is missing on the server or the path configuration is incorrect.

步骤六：Review AnQiCMS content settings image processing options

In some cases, the image processing feature of AnQiCMS may cause the front-end images to not display as expected.

  • Log in to the AnQiCMS backend, go to the "Content Settings" menu under "Backend Settings" (refer to the document "Content Settings Usage Help").
  • WebP image format:If the 'Enable WebP image format' is turned on, please make sure the image has been successfully converted to WebP.If the conversion fails, the old format image may still be displayed or it may not be possible to load.
  • English compression of large image/thumbnail size:If you modified the "Auto compress to specified width" or "Thumbnail sizePerform 'Batch regenerate thumbnails' when necessary to apply new size settings.

Changes to these settings may require reprocessing images, which may affect the front-end display.

Step seven: Verify image references in the template file (for advanced users or developers only)

If you or your team have manually modified the website template files, the way images are referenced may also be the problem.

  • Log in to the AnQiCMS admin panel, go to 'Template Design' under 'Template Management', or directly access the template files on the server via FTP/SSH (refer to the documents 'Some Basic Conventions of Template Making' and 'Directory and Template of Template Making').
  • Find the template file of the related page.
  • Find the code that references the image, for example{{item.Thumb}}or{{archiveLogo}}(Refer to the document 'Document Details Tag').
  • Ensure that the image path is dynamically obtained, rather than a hardcoded absolute path. Hardcoded paths are easily invalidated after the image file is moved.

Preventive measures and **Practice**

To reduce the probability of such issues occurring again, as a website operator, it is recommended that you follow the following practices:

  • Educational content editor:Inform the colleague responsible for image upload and update, after updating the image in the background,