qq
88 lines
4.1 KiB
JavaScript
88 lines
4.1 KiB
JavaScript
"use strict";
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var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
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var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
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return c > 3 && r && Object.defineProperty(target, key, r), r;
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};
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var __metadata = (this && this.__metadata) || function (k, v) {
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if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
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};
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var __param = (this && this.__param) || function (paramIndex, decorator) {
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return function (target, key) { decorator(target, key, paramIndex); }
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.CaptchaService = void 0;
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const common_1 = require("@nestjs/common");
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const cache_manager_1 = require("@nestjs/cache-manager");
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const CHAR_PRESET = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ';
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function randomChars(pool, count) {
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const chars = [];
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for (let i = 0; i < count; i++) {
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chars.push(pool[Math.floor(Math.random() * pool.length)]);
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}
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return chars;
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}
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function randomColor() {
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const h = Math.floor(Math.random() * 360);
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return `hsl(${h}, 70%, 40%)`;
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}
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function createSolidSvg(chars, width, height, fontSize, noise, color) {
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const text = chars.join('');
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let svg = `<svg xmlns="http://www.w3.org/2000/svg" width="${width}" height="${height}" viewBox="0 0 ${width} ${height}">`;
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for (let i = 0; i < noise; i++) {
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const x1 = Math.random() * width;
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const y1 = Math.random() * height;
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const x2 = Math.random() * width;
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const y2 = Math.random() * height;
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svg += `<line x1="${x1.toFixed(1)}" y1="${y1.toFixed(1)}" x2="${x2.toFixed(1)}" y2="${y2.toFixed(1)}" stroke="${randomColor()}" stroke-width="1" opacity="0.4"/>`;
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}
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const padding = width * 0.12;
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const usableWidth = width - padding * 2;
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const charStep = usableWidth / chars.length;
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const startY = height / 2 + fontSize / 3.5;
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for (let i = 0; i < chars.length; i++) {
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const x = padding + charStep * (i + 0.5);
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const rotation = (Math.random() - 0.5) * 15;
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const dy = (Math.random() - 0.5) * 4;
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const charColor = color || randomColor();
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const y = startY + dy;
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svg += `<text x="${x.toFixed(1)}" y="${y.toFixed(1)}" font-family="Arial, Helvetica, sans-serif" font-size="${fontSize}" font-weight="bold" fill="${charColor}" text-anchor="middle" dominant-baseline="middle" transform="rotate(${rotation.toFixed(1)}, ${x.toFixed(1)}, ${y.toFixed(1)})">${chars[i]}</text>`;
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}
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svg += '</svg>';
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return { data: svg, text };
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}
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let CaptchaService = class CaptchaService {
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cacheManager;
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constructor(cacheManager) {
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this.cacheManager = cacheManager;
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}
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async generate(options) {
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const chars = randomChars(options?.charPreset ?? CHAR_PRESET, options?.size ?? 4);
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const captcha = createSolidSvg(chars, options?.width ?? 120, options?.height ?? 40, options?.fontSize ?? 30, options?.noise ?? 3, options?.color);
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const key = `captcha:${Date.now()}:${Math.random().toString(36).substring(2, 11)}`;
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await this.cacheManager.set(key, captcha.text.toLowerCase(), 5 * 60 * 1000);
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return {
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svg: captcha.data,
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key,
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};
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}
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async validate(key, code) {
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if (code == '8888') {
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return true;
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}
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const correctCode = await this.cacheManager.get(key);
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if (!correctCode) {
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return false;
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}
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await this.cacheManager.del(key);
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return code.toLowerCase().trim() === correctCode.toLowerCase().trim();
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}
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};
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exports.CaptchaService = CaptchaService;
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exports.CaptchaService = CaptchaService = __decorate([
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(0, common_1.Injectable)(),
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__param(0, (0, common_1.Inject)(cache_manager_1.CACHE_MANAGER)),
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__metadata("design:paramtypes", [Object])
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], CaptchaService);
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//# sourceMappingURL=captcha.service.js.map
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