# raodv/captcha

行为验证码(滑动拼图、点选文字)，前后端(java)交互，包含h5/Android/IOS/flutter/uni-app的源码和实现

Repository: https://github.com/raodv/captcha
Canonical: https://ross.abutalabs.com/products/raodv-captcha
Homepage: https://captcha.anji-plus.com/
Language: Java
License: Apache-2.0
License Family: permissive
Topics: java, vue, captcha, flutter, uni-app
Last push: 2025-04-08T00:41:05+00:00

## Health v2 (maintenance only)
Score: 39/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 15, release rhythm 35, longevity 100
- inputs: {"age_days": 2365, "days_push": 513, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1685, forks 375 (observed 2026-08-28T04:05:22.060906+00:00)

## What it is
AjPlus Captcha is an open-source behavioral CAPTCHA library providing sliding puzzle and click-word verification challenges with frontend UI components and a Java backend verification service. It ships client implementations for Android, iOS, Flutter, uni-app, ReactNative, Vue, Angular, HTML, and PHP, with a dependency-free Java core extensible via SPI.

## Use cases
- add a sliding puzzle captcha to a login form
- protect signup and comment forms from bots with click-word verification
- verify captcha answers server-side in a Java backend
- embed a captcha in a Flutter or uni-app mobile app
- integrate human verification into a Vue or Angular web app
- block automated credential stuffing on a web login

## When to choose
- you need behavioral captchas (slide puzzle, click word) rather than distorted text
- your stack includes Java on the backend and any of Vue, Angular, Android, iOS, Flutter, or uni-app on the client
- you want a dependency-free core that can be extended with custom captcha types via SPI
- you need a self-hosted captcha solution instead of a paid third-party service

## When to avoid
- your backend is not on the JVM and you cannot port the verification logic
- you prefer fully managed captcha services like reCAPTCHA or hCaptcha with no server code
- you need accessibility-first or audio-based captcha alternatives
- you only need simple image-distortion text captchas

## Facets
- artifact type: library
- maturity: active
- function: security, ui-components, web-framework, http-server
- domain: security, web-development, frontend, backend, mobile-development, cross-platform
- platform: jvm, cross-platform, browser
- tags: captcha, behavioral-captcha, slide-puzzle, click-word, anti-bot, human-verification, uni-app, flutter, vue, spring-boot, spi-extensible, bot-protection, login-protection, form-protection, android, ios, web-server

## Member repositories
- raodv/captcha (main) score 39

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:22.060906+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:41:15.240558+00:00, confidence not recorded.
  - readme: https://github.com/raodv/captcha (fetched 2026-08-28T04:05:22.060906+00:00, sha 94d0fc3dfa0b)
- Data as of 2026-08-30T08:39:29.467469+00:00.