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A self-hosted API service for captcha recognition on the Nanjing University Unified Authentication login interface, along with a complementary browser plugin.
当前为
// ==UserScript==
// @name NJU-CAPTCHA-Hacker
// @namespace https://github.com/geother/NJU-CAPTCHA-Hacker
// @version 1.0
// @description A self-hosted API service for captcha recognition on the Nanjing University Unified Authentication login interface, along with a complementary browser plugin.
// @author Your Name
// @match https://authserver.nju.edu.cn/*
// @grant GM_xmlhttpRequest
// @license Apache-2.0
// ==/UserScript==
(function() {
'use strict';
// Function to convert canvas to blob
function canvasToBlob(canvas, callback) {
canvas.toBlob(function(blob) {
callback(blob);
});
}
// Function to send captcha image file to API and fill response
function processCaptcha(canvas) {
// Convert canvas to blob
canvasToBlob(canvas, function(blob) {
// Create FormData object
var formData = new FormData();
formData.append('image', blob, 'captcha.jpg');
// Send captcha image file to API
GM_xmlhttpRequest({
method: 'POST',
url: 'http://121.36.61.159:1145/api/extract_code',
responseType: 'json',
data: formData,
onload: function(response) {
var responseData = JSON.parse(response.responseText);
var captchaResponseInput = document.getElementById('captchaResponse');
if (captchaResponseInput) {
captchaResponseInput.value = responseData.code;
} else {
console.error('Captcha response input element not found');
}
},
onerror: function(error) {
console.error('Error occurred while sending captcha to API:', error);
}
});
});
}
// Wait for the captcha image to load
window.addEventListener('load', function() {
var captchaImg = document.getElementById('captchaImg');
if (captchaImg) {
// Create a canvas element
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
// Set canvas dimensions to match captcha image
canvas.width = captchaImg.width;
canvas.height = captchaImg.height;
// Draw captcha image onto canvas
ctx.drawImage(captchaImg, 0, 0, captchaImg.width, captchaImg.height);
// Process captcha image
processCaptcha(canvas);
} else {
console.error('Captcha image element not found');
}
});
})();