Are you experiencing an error with the Anqi CMS comment captcha? Don't worry, a senior operations expert will guide you step by step to troubleshoot!

As an expert in website operations for many years, I am well aware of the importance of captcha for website security and anti-spam information.However, when users submit messages or comments on the Anqi CMS website and encounter the prompt 'CAPTCHA error', it often brings a bad experience to the users and also causes the website operators a great deal of headache.This kind of problem may seem simple, but it may involve multiple aspects such as frontend, backend, and server configuration.Today, let me unravel the intricacies with you, step by step, to trace the root cause of the security CMS留言 verification code error.

1. Deeply understand the Anqi CMS captcha mechanism

Before starting the troubleshooting, we first need to understand how Anqi CMS handles captcha. According to the Anqi CMS documentation (tag-captcha.md），The captcha function mainly depends on the interaction between front-end JavaScript and back-end API. The general process is as follows:

  1. Get the captcha:The front-end page sends a request to the back-end API (usually) using JavaScript/api/captcha), obtaining a verification code ID (captcha_id）and the captcha image (usually in Base64 encoding or image URL).
  2. Front-end display:The one obtainedcaptcha_idis stored in a hidden field, and the captcha image is displayed to the user.
  3. User Input:User enters the captcha text based on the image.
  4. Submit Verification:When the user submits the message form, they will also submitcaptcha_idand the captcha text entered by the user (captchaCheck with the backend.

Once we understand this mechanism, we can conduct detailed checks layer by layer from the client to the server.

2. Start with the user end and the frontend page.

The user-side anomalies are often the first step in troubleshooting and the most direct feedback.

2.1 User operation level confirmation

Firstly, we need to exclude some of the most basic user operation mistakes:

  • Spelling mistakes:Although some captcha does not distinguish between uppercase and lowercase, it is still necessary to remind users to check whether the error is caused by confusion between uppercase and lowercase or hasty input.
  • Not refreshed in time:The user has been on the page for a long time, the captcha may have expired. It is recommended that the user try to click the captcha image to refresh and obtain a new captcha before submitting.

2.2 Check Browser and Network Environment

Next, you can quickly locate most front-end issues by using the browser developer tools (F12).

  • Check if the captcha image is displayed normally:Open the “Network” (Network) tab, refresh the page or click on the captcha image. Look for something like/api/captchaThe request, check its status code.
    • If the status code is200 OKand returned image data, it means the backend has generated and responded to the captcha image normally.
    • If the status code is404 Not FoundThe value indicates that the API path is incorrect or the backend service is not started/unexposed.
    • If the status code is500 Internal Server ErrorThe value indicates that an internal error occurred while generating the captcha on the backend.
    • If the image loads slowly or displays as a 'red cross', it may be due to network connection issues, CDN configuration errors, or the image data itself being corrupted.
  • Check JavaScript console errors:Switch to the "Console" tab and check if there are any JavaScript error reports. The Safe CMS frontend retrieves and updates dynamically through JScaptcha_idand image, if there is an error in the JS code, it may lead tocaptcha_idincorrect assignment, or unable to correctly capture the user's input, resulting in errors during backend validation. Checktag-captcha.mdDoes the provided JS code integrate correctly?
  • Browser cache or plugin interference:Try clearing your browser cache, or test in the browser's private mode (incognito mode) to exclude interference from browser cache or certain ad blockers, security plugins on the captcha script or images.

3. Backend Configuration and Server Environment Diagnostics

When there are no apparent issues on the front-end, the fault point is likely to be the backend configuration or server environment of Anqi CMS.

3.1 SecureCMS Back-end Function Check

SecureCMS provides convenient back-end management functions. We need to confirm whether the captcha function has been correctly enabled.

  • 留言/Comment verification code switch：Log in to the Anqi CMS background, go toFunction Management-Website messagesorContent comments(Please refer to the back-end interface orhelp-index.mdthe functional management section), check if the verification code function has been ticked to enable.tag-captcha.mdThe screenshot clearly shows the settings here. If it is not enabled here, even if the front-end code is correct, it is of no help.

3.2 Template file code integrity check

If the front-end image displays normally but an error is reported after submission, we need to carefully check the code related to the captcha in the front-end template.

  • Checktag-captcha.mdThe code snippet:Compare your message or comment template (usually intemplate/guestbook/index.htmlortemplate/comment/list.htmlthe vicinity, refer todesign-director.md) for the captcha implementation code, whether it is completely consistent with the example code provided in thetag-captcha.mddocument. Pay special attention to the following points:
    • Hidden field<input type="hidden" name="captcha_id" id="captcha_id">Does it exist and the ID is correct.
    • Captcha input box<input type="text" name="captcha" ...>Does it exist andnamethe attribute is correct.
    • Used to display the captcha image.<img>Does the label exist andidproperty (such asget-captcha）correct.
    • Does the JavaScript code correctly bind the click event and call throughfetchor$.getand other methods/api/captcha.
    • After receiving the response, is it correctly handledres.data.captcha_idAssign to the hidden field and.res.data.captchaAssign to.<img>ofsrcproperties.
    • If jQuery is used, check if the jQuery library is loaded correctly and the code is compatible.

3.3 Backend API Interface and Server Log Analysis

This is a key link in solving the problem, especially when the captcha image cannot be loaded or submitted, and the verification always fails.

  • Direct Test/api/captchaInterface:
    • Try to access your domain name directly by adding/api/captcha[for example]http://yourdomain.com/api/captcha）。If configured correctly, it should return a JSON object that includescaptcha_idandcaptcha(The Base64 encoding of the captcha image).
    • If the direct access returns 404, 500, or a blank page, it indicates that there is an issue with the backend API service.
  • Check the security CMS application logs:
    • Log in to your server, find the running log file of the security CMS application. According tostart.mdandinstall.mdthe instructions, it is usually located in/www/wwwroot/你的站点目录/running.log[en]Or other custom log paths.
    • [en]Find the nearest error information, especially with/api/captchaInterface or log entry submission related. Error logs in Go language usually provide detailed stack information, helping you locate specific problems in the code.
  • Check the Web server (Nginx/Apache) logs:
    • If your CMS runs behind Nginx or Apache reverse proxy (such asapache.md,docker-1panel.md,docker-aapanel.md,docker-bt.md[en] Please check if Nginx/Apache is shown),access.loganderror.log.
    • access.log[en] Can be confirmed/api/captcha[en] Whether the request has reached Nginx/Apache