In today's internet environment, the interactive functions of websites, such as message boards and comment sections, enhance user engagement while also facing increasingly severe challenges from spam and automated robot attacks.AnQiCMS (AnQiCMS) is a corporate-level content management system that focuses on efficiency and security, and has meticulous consideration and practice in dealing with such issues.Today, let's delve deep into the backend verification logic and process of the留言验证码留言验证码 in AnQiCMS, and see how it safeguards the security of your website.

Message captcha: the first line of defense for website interaction

Firstly, we need to understand the value of the留言验证码.It is not just a simple security measure, but also a key link to ensure the quality of website content and user experience.By requiring users to input a captcha, the system can effectively distinguish between real users and malicious robots, thereby reducing spam comments and advertisements, and protecting the purity of the website content.AnQiCMS knows this and has designed its captcha mechanism to be both secure and user-friendly.

Background configuration: Enable the captcha feature starting point

AnQiCMS's留言验证码功能并非默认开启，而是需要网站管理员在后台进行手动设置。通常，您可以在“Function Management”模块下的“Website Message Management”或相关'Content Settings'Found and enabled“Message and Comment Verification Code Function”This step is the starting point of the entire verification process. The system will only perform captcha verification on the frontend message submission if the administrator explicitly enables it.

Front-end interaction: the verification process visible to users

The overall front-end interaction process is roughly as follows:

  1. Get the captcha:When the user accesses a page containing a message form or clicks the captcha refresh button, the front-end will send a request to the AnQiCMS backend using JavaScript.GETRequest, usually a request/api/captchainterface. The purpose of this interface is to obtain a new verification code image and its unique identifier.
  2. Backend response and storage:AnQiCMS backend upon receiving/api/captchaAfter the request, a dynamic verification code image containing a random combination of letters and numbers will be generated. At the same time, it will assign a uniquecaptcha_id, and thiscaptcha_idAssociate with the correct verification code string, securely stored on the server (usually using session or caching mechanism), and set a reasonable expiration time. Subsequently, the backend will send the Base64 encoded data of the verification code image.captcha_idReturn as JSON response to the front end.
  3. Front-end display and hide fields:After the browser receives the response, it will render the Base64 encoded image data to<img>Label within, for user identification. At the same time, that uniquecaptcha_idWill be written by JavaScript into a<input type="hidden" name="captcha_id">Hidden form field, waiting for the subsequent form submission.
  4. User Input:Users manually input the recognized characters from the image content into the visible<input type="text" name="captcha">text box.

Backend verification logic: the core mechanism to ensure the safety of messages

When the user fills in the message content, captcha, and clicks the submit button, the actual backend verification process is officially initiated.This is the key link to ensure the security of message information in AnQiCMS.

  1. Form submission:The front-end form will submit all comment data, including that entered by the user,captcha(captcha) and hidden fields,captcha_idall together through thePOSTrequest sent to the AnQiCMS backend (for example}]}/guestbook.htmlInterface or comment submission interface).
  2. Data reception and extraction:AnQiCMS backend receives thisPOSTAfter receiving the request, it will extract the user submittedcaptcha_idandcaptchavalues, as well as other related fields.
  3. Find and compare:This is the core step of captcha verification. The backend will use thecaptcha_idto query the server-side stored, and compare with thecaptcha_idThe correct verification code string associated. If found successfully, the backend will strictly compare the submittedcaptchavalue with the correct string stored on the server.
  4. Validity judgment:
    • Successfully matched:If the user enters:captchais completely consistent with the string stored on the server, and thecaptcha_idNot expired, AnQiCMS backend will judge the captcha valid.The system will continue to process the user's message content, such as saving it to the database, triggering email notifications, and performing sensitive word filtering, etc.
    • Matching failed or expired:If the user enters:captchadoes not match the stored string orcaptcha_idInvalid (for example, the user refreshed the page, the oldcaptcha_idThe code has expired) or the captcha has exceeded its preset validity period, the AnQiCMS backend will immediately terminate the processing of the message content.It will return an error response to the front-end (for example: "Incorrect captcha, please re-enter" or "Captcha has expired"), usually saving no data, thus effectively intercepting potential spam information.
  5. Considerations for security:It is worth emphasizing that AnQiCMS is developed based on Go language, and its high concurrency and security are one of its technical highlights.The Go language's Goroutine mechanism enables the backend to efficiently handle a large number of captcha requests and form submissions, while the modular design also ensures the independence and stability of the captcha function.This server-side rigorous verification makes it difficult for robots to bypass, thereby greatly enhancing the website's ability to resist spam information.

Summary

Through the above process, it can be seen that the AnQiCMS留言验证码 mechanism is a system that closely collaborates between the front-end and back-end with rigorous logic.It not only provides intuitive user interaction on the front-end, but also builds a solid and reliable validation logic on the back-end. Through a series of steps such as generation, storage, and comparison, it effectively guarantees the purity and safety of the interactive content on the website.For small and medium-sized enterprises and content operation teams, this efficient and secure solution provided by AnQiCMS is undoubtedly an important tool for maintaining the healthy ecosystem of the website.

Common Questions (FAQ)

  1. Q: Why doesn't the website message or comment captcha image display?A: If the captcha image does not display, please first check the Network tab in the browser console to see if there are any issues/api/captchaThe request to the interface, as well as whether the request is successful and returns (status code 200).If the request fails, it may be due to the backend service not running properly, network configuration issues (such as incorrect reverse proxy settings) or firewall blocking.<img>Tagssrcwhether the properties are set correctly.

  2. Q: I always get prompted with "captcha error" when I submit my message, even though the one I entered looks correct, why is that?A: This situation may have several reasons.The most common is that the captcha has expired, AnQiCMS sets an expiration time for each captcha for security reasons. If the user does not submit the captcha for a long time after it is generated, the captcha will expire.captcha_idMismatch with backend storage. Suggest trying to refresh the page, get the verification code immediately after submission, and check the browser console to see if there is any relevant information.captcha_idorcaptchaSubmission error message.

  3. Q: AnQiCMS's留言验证码是图形验证码吗？支持其他类型的验证码（如滑块、短信验证）吗？A: According to the provided document and front-end code example, AnQiCMS currently built-in comment captcha is based on a combination of graphical recognition of numbers and letters.It generates an image to prompt the user to input the recognized characters.The document does not mention direct support for other types of captcha (such as slider captcha, SMS verification, click verification, etc.). If such advanced verification features are required, it may be necessary to perform secondary development or integrate third-party services.