Add README descriptions

Add demo GIF and sandbox folder
add module code
2025-12-28 15:59:31 +03:00 · 2025-12-28 15:59:06 +03:00 · 2025-12-28 15:54:54 +03:00 · 2025-12-28 15:53:59 +03:00
75 changed files with 3862 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -1,2 +1,97 @@
 # Open Puzzle Captcha
+**Open Puzzle Captcha** is a open-source interactive captcha which use puzzle solve for bot filtration 
+![Open Puzzle Captcha DEMO](https://media.fullgream.tech/gif-for-openpuzzle.gif)
+## How use NPM module
+You can use NPM module for generate tasks. Install the module:
+```bash
+npm i openpuzzle-captcha
+```
+**It's required:** install Graphics Magick
+- For Windows: http://www.graphicsmagick.org/INSTALL-windows.html (**Add gm.exe to PATH!!**)
+- For linux (debian): `sudo apt-get update && sudo apt install graphicsmagick -y`

+And include it in the project:
+```js
+const opc = require("openpuzzle-captcha");
+opc.generateTask("/path/to/images/folder").then(console.log);
+```
+## How add the widget
+Clone the repository:
+```bash
+git clone https://git.fullgream.tech/fullgream/openpuzzle-captcha.git
+```
+You can include this widget in your HTML (take code from widget/opc-widget.html):
+```html
+    <div value="" success="false" class="opc-widget" captcha-url='http://example.org/<captcha_id>' style='border: 1px solid; border-color: #AFAFAF; border-radius: 15px; width: 365px; padding-top: 10px; padding-left: 10px; font: 12px system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif'>
+        <canvas width="350" height="350">Your browser don't support Canvas</canvas>
+        <!-- Required by license -->
+        <a href="https://git.fullgream.tech/fullgream/openpuzzle-captcha">OpenPuzzle Captcha</a>
+    </div>
+```
+And in your Java Script:
+```js
+// Take opc-widget.js from widget/opc-widget.js
+import { initOPCWidgets } from "/path/to/opc-widget.js";
+initOPCWidgets();
+```
+In HTML attribute "captcha-url", fill the address of API.
+## How it works
+**Open Puzzle Captcha** separated by two parts - client widget (for next: widget) and open puzzle captcha API (for next: API). For first, the widget sends request to the API, the API takes random picture (150x150px), splits the picture by 9 fragments (in future version, I can add 4 parts mode), adds changes for this fragments (**It's important. After it, fragments change their hash-sum**). the API generates unique key for every fragment and summorize it by solve key. After it, the API shuffle the parts of picture and send them as response to the widget. The widget don't know which combination is correct (It dictated by abuse safety), the widget spawns the parts of picture in field (for next: shards) and waits before user not solve the puzzle. Every cell of the field has number 1..9:
+| 1 | 2 | 3 |
+|--|--|--|
+| 4 | 5 | 6 |
+| 7 | 8 | 9 |
+When user grabbing the shard to the cell, the widget remembers number of this cell and writes key of the cell to the chain of responses. It forms answer of the Captcha. For Example:
+| 1d23af | 2fde09 | e389a1 |
+|--|--|--|
+| 4f441d | 5cd456 | 6ff1ce |
+| 7a1def | 8df780 | 9a1d8f |
+Captcha answer: 1d23af2fde09e389a14f441d5cd4566ff1ce7a1def8df7809a1d8f  \
+This answer will sent to the API and after it, the API compare the answer with the correct solve and return result to widget. If captcha answer is wrong, the API generates new captcha's task and deletes old. Else - the API leave the Success Code which may use for forms in the website.
+More details: [In develop]
+## API
+The widget sends GET-request to website which includes in attribute "captcha-url". The widget awaits next JSON response:
+```js
+{
+    "isError": false,
+    "mode": "3x3",  // <-- for now, supports only 3x3 mode
+    "fragments": {
+        "<fragment-id-1>": "http://url.of/image's/fragment/1",
+        "<fragment-id-2>": "http://url.of/image's/fragment/2",
+        ...
+        "<fragment-id-9>": "http://url.of/image's/fragment/9"
+    }
+}
+```
+After user solve the captcha and press button "Send Result", the widget send POST-request to **the same address** which contains next JSON body:
+```json
+{
+    "answer": "<captcha-answer>",
+}
+```
+And we have 2 awaited ways: \
+**First**: Correct answer, server send:
+```json
+{
+    "isError": false,
+    "isSuccess": true,
+    "successCode": "<secret-success-code>"
+}
+```
+The Widget get successCode and change attribute "value" inside itself to successCode's value. \
+**Second**: Wrong answer, server send:
+```json
+{
+    "isError": false,
+    "isSuccess": false,
+    "tryAgain": "/path/to/new/captcha"
+}
+```
+### API errors
+If in the runtime in the API occured errors, the widget get errors from the API:
+```json
+{
+    "isError": true,
+    "message": "Error message"
+}
+```
--- a/gif-for-openpuzzle.gif
+++ b/gif-for-openpuzzle.gif
--- a/index.js
+++ b/index.js
@ -0,0 +1 @@
+module.exports = require("./module");
--- a/module/gm.js
+++ b/module/gm.js
@ -0,0 +1,53 @@
+const { spawn } = require("child_process");
+
+// GM
+async function callGM(params, stdin) {
+	const out = [];
+	const err = [];
+
+	return await new Promise((resolve, reject) => {
+		gm = spawn("gm", params);
+
+		gm.stdout.on("data", (c) => out.push(c));
+		gm.stderr.on("data", (c) => err.push(c));
+
+		gm.on("close", (code) => {
+			if (code !== 0) return reject(Buffer.concat(err).toString());
+
+			resolve(Buffer.concat(out));
+		});
+		gm.stdin.end(stdin);
+	});
+}
+
+const d = (dbg) => console.debug(dbg) || dbg;
+class GMController {
+	async cropImage(buffer, x, y, offsetX = 0, offsetY = 0) {
+		return await callGM(
+			["convert", "-", "-crop", `${x}x${y}+${offsetX}+${offsetY}`, "png:-"],
+			buffer,
+		);
+	}
+
+	// For change hash-sum by insignificant changes in pixel colors
+	async repixelise(buffer) {
+		const noiseAmount = Math.random() * 1; // 0..1%
+		const brightness = (98 + Math.random() * 4).toFixed(2); // 98..102%
+
+		return await callGM(
+			["convert", "-", "-noise", ""+noiseAmount, "-modulate", brightness.toString(), "png:-"],
+			buffer,
+		);
+	}
+	
+	async getSize (buffer) {
+		const [width, height] =(await callGM(
+			['identify', '-format', '%w %h', '-'],
+			buffer,
+		)).toString().split(/\s{1,}/g).map(s => +s);
+		
+		return { width, height };
+	}
+}
+
+module.exports = new GMController();
--- a/module/index.js
+++ b/module/index.js
@ -0,0 +1,117 @@
+const fs = require("fs");
+const path = require("path");
+const gm = require("./gm");
+const mime = require("./mimetype");
+
+function shuffle(array) {
+	for (let i = array.length - 1; i > 0; i--) {
+		let j = Math.floor(Math.random() * (i + 1));
+		[array[i], array[j]] = [array[j], array[i]];
+	}
+}
+
+function readFixedBytes(pathToFile, size = 16) {
+	const fd = fs.openSync(pathToFile, "r");
+	try {
+		const buffer = Buffer.alloc(size);
+		fs.readSync(fd, buffer, 0, size, 0);
+		return buffer;
+	} catch (err) {
+		console.error(err);
+	} finally {
+		fs.closeSync(fd);
+	}
+}
+
+async function isImage (pathToFile, requiredSize=null) {
+	const contentType = mime.byPath(pathToFile).contentType;
+	const isImageMime = /^image\//m.test(contentType);
+	if (
+		!isImageMime || !requiredSize ||
+		!Array.isArray(requiredSize)
+	) return isImageMime;
+	
+	const [width, height] = requiredSize;
+	const { width:ow, height:oh } = await gm.getSize(
+		fs.readFileSync(pathToFile)
+	);
+	
+	return width === ow && height === oh;
+}
+
+async function getImageFromFolderGeneral (imagesFolder) {
+	// Get list of images from folder
+	const entries = fs.readdirSync(imagesFolder, { withFileTypes: true });
+	const images = [];
+	for (let entry of entries) {
+		if (!entry.isDirectory() && !!(await isImage(path.join(imagesFolder, entry.name), [150, 150]))) {
+			images.push(path.join(imagesFolder, entry.name));
+		}
+	}
+	
+	if (images.length === 0)
+		throw new Error(imagesFolder, "has not required images (150x150 px)");
+	
+	shuffle(images);
+	//console.debug(images);
+	return images[0];
+}
+
+function genHashGeneral(length = 3) {
+	return Buffer.from(
+		[...new Array(length)].map((x) => Math.round(Math.random() * 255)),
+	).toString("hex");
+}
+
+async function generateTask (imagesFolder, options = {}) {
+	if (!path.isAbsolute(imagesFolder))
+		imagesFolder = path.join(process.cwd(), imagesFolder);
+	
+	// Define tools
+	if (!options.genHash) options.genHash = genHashGeneral;
+	if (!options.getImageFromFolder)
+		options.getImageFromFolder = getImageFromFolderGeneral;
+	
+	const choosenImage = fs.readFileSync(await getImageFromFolderGeneral(imagesFolder));
+	// Split the image by 9 shards
+	const fragments = new Object();
+	let answer = "";
+	const addOps = [];
+	for (let row = 0; row < 3; row++)
+		for (let col = 0; col < 3; col++) {
+			let key;
+			do {
+				key = options.genHash();
+			} while (!!fragments[key]);
+			answer += key;
+			const shardBytes = await gm.repixelise(
+				await gm.cropImage(choosenImage, 50, 50, col * 50, row * 50),
+			);
+			addOps.push(
+				() =>
+					(fragments[key] =
+						`data:image/png;base64,${shardBytes.toString("base64")}`),
+			);
+		}
+	shuffle(addOps);
+	addOps.forEach((f) => f());
+	const successCode = options.genHash(8);
+	
+	return {
+		openPuzzleCaptchaAPI: {
+			getTask: {
+				isError: false,
+				mode: "3x3",
+				fragments
+			},
+			taskSolved: {
+				isError: false,
+				isSuccess: true,
+				successCode
+			},
+		},
+		answer,
+	};
+}
+
+module.exports = { generateTask };
--- a/module/mimetype.js
+++ b/module/mimetype.js
@ -0,0 +1,128 @@
+const fs = require("fs");
+
+function readByBuffer(buffer) {
+	if (!Buffer.isBuffer(buffer) || buffer.length < 4) {
+		return { contentType: "application/octet-stream", extension: "" };
+	}
+	buffer = buffer.slice(0, 16);
+
+	// ---------- IMAGES ----------
+
+	// PNG
+	if (
+		buffer.length >= 8 &&
+		buffer[0] === 0x89 &&
+		buffer[1] === 0x50 &&
+		buffer[2] === 0x4e &&
+		buffer[3] === 0x47
+	) {
+		return { contentType: "image/png", extension: "png" };
+	}
+
+	// JPEG
+	if (buffer[0] === 0xff && buffer[1] === 0xd8) {
+		return { contentType: "image/jpeg", extension: "jpg" };
+	}
+
+	// GIF
+	if (buffer[0] === 0x47 && buffer[1] === 0x49 && buffer[2] === 0x46) {
+		return { contentType: "image/gif", extension: "gif" };
+	}
+
+	// WEBP
+	if (
+		buffer.length >= 12 &&
+		buffer[0] === 0x52 && // R
+		buffer[1] === 0x49 && // I
+		buffer[2] === 0x46 && // F
+		buffer[3] === 0x46 && // F
+		buffer[8] === 0x57 && // W
+		buffer[9] === 0x45 && // E
+		buffer[10] === 0x42 && // B
+		buffer[11] === 0x50 // P
+	) {
+		return { contentType: "image/webp", extension: "webp" };
+	}
+
+	// ---------- VIDEO / AUDIO ----------
+
+	// MP4 / M4V / MOV (ISO BMFF)
+	if (buffer.length >= 12 && buffer.slice(4, 8).toString() === "ftyp") {
+		const brand = buffer.slice(8, 12).toString();
+
+		if (["isom", "mp41", "mp42"].includes(brand)) {
+			return { contentType: "video/mp4", extension: "mp4" };
+		}
+
+		if (["M4V ", "M4VH"].includes(brand)) {
+			return { contentType: "video/x-m4v", extension: "m4v" };
+		}
+
+		if (brand === "qt  ") {
+			return { contentType: "video/quicktime", extension: "mov" };
+		}
+	}
+
+	// MP3
+	if (
+		buffer.slice(0, 3).toString() === "ID3" ||
+		(buffer[0] === 0xff && (buffer[1] & 0xe0) === 0xe0)
+	) {
+		return { contentType: "audio/mpeg", extension: "mp3" };
+	}
+
+	// WAV
+	if (
+		buffer.slice(0, 4).toString() === "RIFF" &&
+		buffer.slice(8, 12).toString() === "WAVE"
+	) {
+		return { contentType: "audio/wav", extension: "wav" };
+	}
+
+	// OGG
+	if (buffer.slice(0, 4).toString() === "OggS") {
+		return { contentType: "audio/ogg", extension: "ogg" };
+	}
+
+	// ---------- DOCUMENTS ----------
+
+	// PDF
+	if (buffer.slice(0, 4).toString() === "%PDF") {
+		return { contentType: "application/pdf", extension: "pdf" };
+	}
+
+	// ZIP (docx, xlsx, apk, etc.)
+	if (buffer[0] === 0x50 && buffer[1] === 0x4b) {
+		return { contentType: "application/zip", extension: "zip" };
+	}
+
+	// ---------- TEXT ----------
+
+	// UTF-8 text (heuristic)
+	const text = buffer.toString("utf8");
+	if (/^[\x09\x0A\x0D\x20-\x7E]*$/.test(text)) {
+		return { contentType: "text/plain", extension: "txt" };
+	}
+
+	// ---------- FALLBACK ----------
+	return {
+		contentType: "application/octet-stream",
+		extension: "",
+	};
+}
+
+function readByPath(pathToFile) {
+	const size = 16;
+	const fd = fs.openSync(pathToFile, "r");
+	try {
+		const buffer = Buffer.alloc(size);
+		fs.readSync(fd, buffer, 0, size, 0);
+		return readByBuffer(buffer);
+	} catch (err) {
+		console.error(err);
+	} finally {
+		fs.closeSync(fd);
+	}
+}
+
+module.exports = { byPath: readByPath, byBuffer: readByBuffer };
--- a/package.json
+++ b/package.json
@ -0,0 +1,22 @@
+{
+  "name": "openpuzzle-captcha",
+  "version": "25.12.0",
+  "description": "Generate of interactive captcha (Puzzles)",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://git.fullgream.tech/fullgream/openpuzzle-captcha.git"
+  },
+  "keywords": [
+    "captcha",
+    "puzzle",
+    "interactive",
+    "canvas",
+    "interactive-captcha"
+  ],
+  "author": "FullGreaM",
+  "license": "MIT"
+}
--- a/sandbox/server/.gitignore
+++ b/sandbox/server/.gitignore
@ -0,0 +1,132 @@
+# ---> Node
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
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--- a/sandbox/server/images/GqF352eXgAAAETO.jpg_thumb
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+++ b/sandbox/server/images/g79466.jpg
--- a/sandbox/server/images/g934883.jpg
+++ b/sandbox/server/images/g934883.jpg
--- a/sandbox/server/images/m593856.jpg
+++ b/sandbox/server/images/m593856.jpg
--- a/sandbox/server/images/x_fb7e9994.jpg
+++ b/sandbox/server/images/x_fb7e9994.jpg
--- a/sandbox/server/images/zhivotnye_obezyana_24040.jpg
+++ b/sandbox/server/images/zhivotnye_obezyana_24040.jpg
--- a/sandbox/server/index.js
+++ b/sandbox/server/index.js
@ -0,0 +1,97 @@
+const opc = require("../../index.js");
+const app = require("express")();
+
+const FOLDER_PATH = "./images";
+
+app.use((req, res, next) => {
+	//return next();  // <-- Disable All CORS rules
+	res.setHeader("Access-Control-Allow-Origin", "*");
+	res.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS");
+	res.setHeader("Access-Control-Allow-Headers", "Content-Type");
+
+	if (req.method === "OPTIONS") {
+		return res.sendStatus(200);
+	}
+
+	next();
+});
+app.use(require("body-parser").json());
+
+const tasks = new Object();
+async function generateTask (id) {
+	const task = await opc.generateTask(FOLDER_PATH);
+	tasks[id] = {
+		answer: task.answer,
+		successCode: task.openPuzzleCaptchaAPI.taskSolved.successCode,
+		fragments: task.openPuzzleCaptchaAPI.getTask.fragments,
+	};
+}
+
+function generateTaskId () {
+	return Buffer.from([...new Array(4)]
+		.map(() => Math.round(Math.random() * 255)))
+		.toString('hex');
+}
+
+app.get("/:taskId", async (req, res) => {
+	const taskId = req.params.taskId;
+	
+	// For DEMO
+	if (!tasks[taskId] && taskId === "test")
+		await generateTask("test");
+	
+	if (!tasks[taskId]) return res.status(400).json({
+		isError: true,
+		message: `Unknown task: ${req.params.taskId}`,
+	});
+	
+	if (tasks[taskId] === true)
+		await generateTask(taskId);
+	
+	return res.json({
+		isError: false,
+		mode: "3x3",
+		fragments: tasks[taskId].fragments,
+	});
+});
+
+app.post("/:taskId", async (req, res) => {
+	const taskId = req.params.taskId;
+	if (!tasks[taskId]) return res.status(400).json({
+		isError: true,
+		message: `Unknown task: ${req.params.taskId}`,
+	});
+	
+	if (!req.body.answer) return res.status(400).json({
+		isError: true,
+		message: "Filed 'answer' not found in JSON body",
+	});
+	
+	const answer = req.body.answer;
+	const trueAnswer = tasks[taskId].answer;
+	const successCode = tasks[taskId].successCode;
+	
+	delete tasks[taskId];
+	
+	if (answer !== trueAnswer) {
+		const tryAgain = generateTaskId();
+		tasks[tryAgain] = true;
+		
+		return res.json({
+			isError: false,
+			isSuccess: false,
+			tryAgain: "/"+tryAgain,
+		});
+	}
+	return res.json({
+		isError: false,
+		isSuccess: true,
+		successCode,
+	});
+});
+
+app.listen(8081, async (err) => {
+	if (err) throw err;
+	generateTask("test");
+	console.log("Listen 8081");
+});
--- a/sandbox/server/package-lock.json
+++ b/sandbox/server/package-lock.json
@ -0,0 +1,764 @@
+{
+  "name": "server",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "express": "^5.2.1",
+        "fs": "^0.0.1-security"
+      }
+    },
+    "node_modules/accepts": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-2.0.0.tgz",
+      "integrity": "sha512-5cvg6CtKwfgdmVqY1WIiXKc3Q1bkRqGLi+2W/6ao+6Y7gu/RCwRuAhGEzh5B4KlszSuTLgZYuqFqo5bImjNKng==",
+      "dependencies": {
+        "mime-types": "^3.0.0",
+        "negotiator": "^1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/body-parser": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.2.1.tgz",
+      "integrity": "sha512-nfDwkulwiZYQIGwxdy0RUmowMhKcFVcYXUU7m4QlKYim1rUtg83xm2yjZ40QjDuc291AJjjeSc9b++AWHSgSHw==",
+      "dependencies": {
+        "bytes": "^3.1.2",
+        "content-type": "^1.0.5",
+        "debug": "^4.4.3",
+        "http-errors": "^2.0.0",
+        "iconv-lite": "^0.7.0",
+        "on-finished": "^2.4.1",
+        "qs": "^6.14.0",
+        "raw-body": "^3.0.1",
+        "type-is": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
+    "node_modules/bytes": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
+      "integrity": "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/call-bind-apply-helpers": {
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+      "integrity": "sha512-Sp1ablJ0ivDkSzjcaJdxEunN5/XvksFJ2sMBFfq6x0ryhQV/2b/KwFe21cMpmHtPOSij8K99/wSfoEuTObmuMQ==",
+      "dependencies": {
+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2"
+      },
+      "engines": {
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+      }
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+      "dependencies": {
+        "call-bind-apply-helpers": "^1.0.2",
+        "get-intrinsic": "^1.3.0"
+      },
+      "engines": {
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+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
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+}
--- a/sandbox/server/package.json
+++ b/sandbox/server/package.json
@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "express": "^5.2.1",
+    "fs": "^0.0.1-security"
+  }
+}
--- a/sandbox/simple-server/.gitignore
+++ b/sandbox/simple-server/.gitignore
@ -0,0 +1,132 @@
+# ---> Node
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
--- a/sandbox/simple-server/gm.js
+++ b/sandbox/simple-server/gm.js
@ -0,0 +1,43 @@
+const { spawn } = require("child_process");
+
+// GM
+async function callGM(params, stdin) {
+	const out = [];
+	const err = [];
+
+	return await new Promise((resolve, reject) => {
+		gm = spawn("gm", params);
+
+		gm.stdout.on("data", (c) => out.push(c));
+		gm.stderr.on("data", (c) => err.push(c));
+
+		gm.on("close", (code) => {
+			if (code !== 0) return reject(Buffer.concat(err).toString());
+
+			resolve(Buffer.concat(out));
+		});
+		gm.stdin.end(stdin);
+	});
+}
+
+class GMController {
+	async cropImage(buffer, x, y, offsetX = 0, offsetY = 0) {
+		return await callGM(
+			["convert", "-", "-crop", `${x}x${y}+${offsetX}+${offsetY}`, "png:-"],
+			buffer,
+		);
+	}
+
+	// For change hash-sum by insignificant changes in pixel colors
+	async repixelise(buffer) {
+		const noiseAmount = Math.random() * 1; // 0..1%
+		const brightness = (98 + Math.random() * 4).toFixed(2); // 98..102%
+
+		return await callGM(
+			["convert", "-", "-noise", ""+noiseAmount, "-modulate", brightness.toString(), "png:-"],
+			buffer,
+		);
+	}
+}
+
+module.exports = new GMController();
--- a/sandbox/simple-server/images/1250_imagesca2x9px0.jpg
+++ b/sandbox/simple-server/images/1250_imagesca2x9px0.jpg
--- a/sandbox/simple-server/images/1330658545_square_small.jpg
+++ b/sandbox/simple-server/images/1330658545_square_small.jpg
--- a/sandbox/simple-server/images/1522b52a.jpeg
+++ b/sandbox/simple-server/images/1522b52a.jpeg
--- a/sandbox/simple-server/images/24621967.png
+++ b/sandbox/simple-server/images/24621967.png
--- a/sandbox/simple-server/images/576746.jpg
+++ b/sandbox/simple-server/images/576746.jpg
--- a/sandbox/simple-server/images/5922524_16876101.jpg
+++ b/sandbox/simple-server/images/5922524_16876101.jpg
--- a/sandbox/simple-server/images/7156560-R3L8T8D-650-surprised-animals-30-150x150.jpg
+++ b/sandbox/simple-server/images/7156560-R3L8T8D-650-surprised-animals-30-150x150.jpg
--- a/sandbox/simple-server/images/791082.jpg
+++ b/sandbox/simple-server/images/791082.jpg
--- a/sandbox/simple-server/images/7ea9a05c7b3954a660769f473fd7a89e.jpg
+++ b/sandbox/simple-server/images/7ea9a05c7b3954a660769f473fd7a89e.jpg
--- a/sandbox/simple-server/images/DrEC5xPiawoxKi86U6OR_25_6434e0d171e27636e45e6f81b9cd7657_avatar.jpg
+++ b/sandbox/simple-server/images/DrEC5xPiawoxKi86U6OR_25_6434e0d171e27636e45e6f81b9cd7657_avatar.jpg
--- a/sandbox/simple-server/images/b33795.jpg
+++ b/sandbox/simple-server/images/b33795.jpg
--- a/sandbox/simple-server/images/f2bc8547eb879cef0b782ff2cda8baaf.jpg
+++ b/sandbox/simple-server/images/f2bc8547eb879cef0b782ff2cda8baaf.jpg
--- a/sandbox/simple-server/images/g619806.jpg
+++ b/sandbox/simple-server/images/g619806.jpg
--- a/sandbox/simple-server/images/g79466.jpg
+++ b/sandbox/simple-server/images/g79466.jpg
--- a/sandbox/simple-server/images/m593856.jpg
+++ b/sandbox/simple-server/images/m593856.jpg
--- a/sandbox/simple-server/images/x_fb7e9994.jpg
+++ b/sandbox/simple-server/images/x_fb7e9994.jpg
--- a/sandbox/simple-server/images/zhivotnye_obezyana_24040.jpg
+++ b/sandbox/simple-server/images/zhivotnye_obezyana_24040.jpg
--- a/sandbox/simple-server/package-lock.json
+++ b/sandbox/simple-server/package-lock.json
@ -0,0 +1,764 @@
+{
+  "name": "simple-server",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "express": "^5.2.1",
+        "fs": "^0.0.1-security"
+      }
+    },
+    "node_modules/accepts": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-2.0.0.tgz",
+      "integrity": "sha512-5cvg6CtKwfgdmVqY1WIiXKc3Q1bkRqGLi+2W/6ao+6Y7gu/RCwRuAhGEzh5B4KlszSuTLgZYuqFqo5bImjNKng==",
+      "dependencies": {
+        "mime-types": "^3.0.0",
+        "negotiator": "^1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/body-parser": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.2.1.tgz",
+      "integrity": "sha512-nfDwkulwiZYQIGwxdy0RUmowMhKcFVcYXUU7m4QlKYim1rUtg83xm2yjZ40QjDuc291AJjjeSc9b++AWHSgSHw==",
+      "dependencies": {
+        "bytes": "^3.1.2",
+        "content-type": "^1.0.5",
+        "debug": "^4.4.3",
+        "http-errors": "^2.0.0",
+        "iconv-lite": "^0.7.0",
+        "on-finished": "^2.4.1",
+        "qs": "^6.14.0",
+        "raw-body": "^3.0.1",
+        "type-is": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
+    "node_modules/bytes": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
+      "integrity": "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/call-bind-apply-helpers": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/call-bind-apply-helpers/-/call-bind-apply-helpers-1.0.2.tgz",
+      "integrity": "sha512-Sp1ablJ0ivDkSzjcaJdxEunN5/XvksFJ2sMBFfq6x0ryhQV/2b/KwFe21cMpmHtPOSij8K99/wSfoEuTObmuMQ==",
+      "dependencies": {
+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
+    "node_modules/call-bound": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/call-bound/-/call-bound-1.0.4.tgz",
+      "integrity": "sha512-+ys997U96po4Kx/ABpBCqhA9EuxJaQWDQg7295H4hBphv3IZg0boBKuwYpt4YXp6MZ5AmZQnU/tyMTlRpaSejg==",
+      "dependencies": {
+        "call-bind-apply-helpers": "^1.0.2",
+        "get-intrinsic": "^1.3.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/content-disposition": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-1.0.1.tgz",
+      "integrity": "sha512-oIXISMynqSqm241k6kcQ5UwttDILMK4BiurCfGEREw6+X9jkkpEe5T9FZaApyLGGOnFuyMWZpdolTXMtvEJ08Q==",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
+    "node_modules/content-type": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.5.tgz",
+      "integrity": "sha512-nTjqfcBFEipKdXCv4YDQWCfmcLZKm81ldF0pAopTvyrFGVbcR6P/VAAd5G7N+0tTr8QqiU0tFadD6FK4NtJwOA==",
+      "engines": {
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+      }
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+      "engines": {
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+      }
+    },
+    "node_modules/cookie-signature": {
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+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.2.2.tgz",
+      "integrity": "sha512-D76uU73ulSXrD1UXF4KE2TMxVVwhsnCgfAyTg9k8P6KGZjlXKrOLe4dJQKI3Bxi5wjesZoFXJWElNWBjPZMbhg==",
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+        "escape-html": "^1.0.3",
+        "etag": "^1.8.1",
+        "finalhandler": "^2.1.0",
+        "fresh": "^2.0.0",
+        "http-errors": "^2.0.0",
+        "merge-descriptors": "^2.0.0",
+        "mime-types": "^3.0.0",
+        "on-finished": "^2.4.1",
+        "once": "^1.4.0",
+        "parseurl": "^1.3.3",
+        "proxy-addr": "^2.0.7",
+        "qs": "^6.14.0",
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+        "router": "^2.2.0",
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+      "engines": {
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+      },
+      "funding": {
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+        "url": "https://opencollective.com/express"
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+      },
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+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
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+      "engines": {
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+    "node_modules/wrappy": {
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+    }
+  }
+}
--- a/sandbox/simple-server/package.json
+++ b/sandbox/simple-server/package.json
@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "express": "^5.2.1",
+    "fs": "^0.0.1-security"
+  }
+}
--- a/sandbox/simple-server/server.js
+++ b/sandbox/simple-server/server.js
@ -0,0 +1,118 @@
+const fs = require("fs");
+const gm = require("./gm");
+
+const app = require("express")();
+const tasks = new Object();
+
+app.use((req, res, next) => {
+	//return next();  // <-- Disable All CORS
+	res.setHeader("Access-Control-Allow-Origin", "*");
+	res.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS");
+	res.setHeader("Access-Control-Allow-Headers", "Content-Type");
+
+	if (req.method === "OPTIONS") {
+		return res.sendStatus(200);
+	}
+
+	next();
+});
+app.use(require("body-parser").json());
+
+function shuffle(array) {
+	for (let i = array.length - 1; i > 0; i--) {
+		let j = Math.floor(Math.random() * (i + 1));
+		[array[i], array[j]] = [array[j], array[i]];
+	}
+}
+
+function getHash(length = 3) {
+	return Buffer.from(
+		[...new Array(length)].map((x) => Math.round(Math.random() * 255)),
+	).toString("hex");
+}
+
+app.post("/test", async (req, res) => {
+	if (!tasks.test) {
+		return res.status(400).json({
+			isError: true,
+			message: "'test' is unknown task",
+		});
+	}
+
+	console.log(req.body);
+	if (!req.body?.answer)
+		return res.status(400).json({
+			isError: true,
+			message: "Empty field 'answer' in JSON-body",
+		});
+	const solve = req.body.answer;
+	if (solve === tasks.test.solve) {
+		const successCode = tasks.test.solveHash
+		delete tasks.test;
+		return res.json({
+			isError: false,
+			isSuccess: true,
+			successCode,
+		});
+	} else {
+		delete tasks.test;
+		return res.json({
+			isError: false,
+			isSuccess: false,
+			tryAgain: "/test",
+		});
+	}
+});
+
+app.get("/test", async (req, res) => {
+	if (tasks.test)
+		return res.json({
+			isError: false,
+			mode: "3x3",
+			fragments: tasks.test.fragments,
+		});
+
+	//const choosenImage = fs.readFileSync("./images/791082.jpg");
+	//const choosenImage = fs.readFileSync("./images/f2bc8547eb879cef0b782ff2cda8baaf.jpg");
+	const choosenImage = fs.readFileSync("./images/5922524_16876101.jpg");
+	//const choosenImage = fs.readFileSync("./images/g619806.jpg");
+	//const choosenImage = fs.readFileSync("./images/576746.jpg");
+	const results = [];
+
+	const fragments = new Object();
+	let solve = "";
+	const addOps = [];
+	for (let row = 0; row < 3; row++)
+		for (let col = 0; col < 3; col++) {
+			let key;
+			do {
+				key = getHash();
+			} while (!!fragments[key]);
+			solve += key;
+			const shardBytes = await gm.repixelise(
+				await gm.cropImage(choosenImage, 50, 50, col * 50, row * 50),
+			);
+			addOps.push(
+				() =>
+					(fragments[key] =
+						`data:image/png;base64,${shardBytes.toString("base64")}`),
+			);
+		}
+
+	shuffle(addOps);
+	addOps.forEach((f) => f());
+	const solveHash = getHash(8);
+
+	tasks.test = { fragments, solve, solveHash };
+	console.log("Required solve:", solve);
+	res.json({
+		isError: false,
+		mode: "3x3",
+		fragments,
+	});
+});
+
+app.listen(8081, (err) => {
+	if (err) throw err;
+	console.info(`Listening: 8081`);
+});
--- a/sandbox/test/.gitignore
+++ b/sandbox/test/.gitignore
@ -0,0 +1,5 @@
+scr.js
+example.js
+package.json
+package-lock.json
+node_modules/
--- a/sandbox/test/frames-success.txt
+++ b/sandbox/test/frames-success.txt
--- a/sandbox/test/index.html
+++ b/sandbox/test/index.html
@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Test Element</title>
+</head>
+<body>
+    <!-- Test url: data:application/json;utf8,{"isError":false,"mode":"3x3","fragments":{"12fedc":"","a1be45":"","0987c4":"","f5ea99":"","90871c":"","56f7e1":"","8891cf":"","ffc45e":"","0c12f1":""}} -->
+    <div value="" success="false" class="opc-widget" captcha-url='http://127.0.0.1:8081/test' style='border: 1px solid; border-color: #AFAFAF; border-radius: 15px; width: 365px; padding-top: 10px; padding-left: 10px; font: 12px system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif'>
+        <canvas width="350" height="350">Your browser don't support Canvas</canvas>
+        <a href="https://git.fullgream.tech/fullgream/openpuzzle-captcha">OpenPuzzle Captcha</a>
+    </div>
+    <script src="./index.js"></script>
+</body>
+</html>
--- a/sandbox/test/index.js
+++ b/sandbox/test/index.js
--- a/test.js
+++ b/test.js
@ -0,0 +1,5 @@
+const path = require("path");
+const opc = require("./");
+
+//opc.generateTask(path.join(__dirname, "./sandbox/simple-server/images")).then(console.log);
+opc.generateTask("./sandbox/simple-server/images").then(console.log);
--- a/widget/opc-widget.html
+++ b/widget/opc-widget.html
@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Test Element</title>
+</head>
+<body>
+    <div value="" success="false" class="opc-widget" captcha-url='http://127.0.0.1:8081/test' style='border: 1px solid; border-color: #AFAFAF; border-radius: 15px; width: 365px; padding-top: 10px; padding-left: 10px; font: 12px system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif'>
+        <canvas width="350" height="350">Your browser don't support Canvas</canvas>
+        <!-- Required by license -->
+        <a href="https://git.fullgream.tech/fullgream/openpuzzle-captcha">OpenPuzzle Captcha</a>
+    </div>
+    <script type="module">
+        import { initOPCWidgets } from "./opc-widget.js";
+        initOPCWidgets();
+    </script>
+</body>
+</html>
--- a/widget/opc-widget.js
+++ b/widget/opc-widget.js
--- a/widget/run-server.sh
+++ b/widget/run-server.sh
@ -0,0 +1,2 @@
+#!/bin/bash
+npx http-server .
Author	SHA1	Message	Date
FullGreaM	dc49e8834c	Add README descriptions	2025-12-28 15:59:31 +03:00
FullGreaM	ac8fe7152f	Add demo GIF and sandbox folder	2025-12-28 15:59:06 +03:00
FullGreaM	014ed6f6a8	add module code	2025-12-28 15:54:54 +03:00
FullGreaM	8c96ae1782	Add widget code	2025-12-28 15:53:59 +03:00