leca
/
captcha_aggregator
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relay requesting (and maybe verifying) to the user

This commit is contained in:
leca 2025-04-30 18:03:56 +03:00
parent 991a4f29a6
commit 92fd491194
22 changed files with 968 additions and 222 deletions
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0
migrate.sh Normal file → Executable file
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2
migrations/1745668334604_proxies.js
View File

@ -18,7 +18,7 @@ export function up(pgm) {
password: {type: 'varchar(32)'}
});
pgm.addColumn('captchas', {proxy_id: {type: 'integer', references: 'proxies(id)'}})
pgm.addColumn('captchas', {proxy_id: {type: 'integer', references: 'proxies(id)'}});
}
/**

46
migrations/1745958234333_users.js Normal file
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@ -0,0 +1,46 @@
export const shorthands = undefined;
/**
* @param pgm {import('node-pg-migrate').MigrationBuilder}
* @param run {() => void | undefined}
* @returns {Promise<void> | void}
*/
export function up(pgm) {
pgm.createTable('users', {
id: 'id',
username: {type:"varchar(32)", notNull: true},
password: {type:"char(60)", notNull: true}
})
pgm.addColumn('captchas', {
submitter: {type: 'integer', references: 'users(id)'}
});
pgm.dropType('protocol_type', {cascade: true});
pgm.dropTable('proxies', {cascade: true});
pgm.dropColumn('captchas', 'proxy_id', {cascade: true});
}
/**
* @param pgm {import('node-pg-migrate').MigrationBuilder}
* @param run {() => void | undefined}
* @returns {Promise<void> | void}
*/
export function down(pgm) {
pgm.dropTable('users');
pgm.dropColumn('captchas', 'submitter');
pgm.createType('protocol_type', ['http', 'https']);
pgm.createTable('proxies', {
id: 'id',
proto: {type: 'protocol_type', notNull: true},
claimed: {type: 'boolean', default: false},
host: {type: 'inet', notNull: true},
port: {type: 'smallint', notNull: true},
username: {type: 'varchar(16)'},
password: {type: 'varchar(32)'}
});
pgm.addColumn('captchas', {proxy_id: {type: 'integer', references: 'proxies(id)'}});
}

667
package-lock.json generated
View File

@ -9,8 +9,11 @@
"version": "1.0.0",
"license": "GPL-3.0-or-later",
"dependencies": {
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"cookie-parser": "^1.4.7",
"dotenv": "^16.5.0",
"express": "^5.1.0",
"jsonwebtoken": "^9.0.2",
"pg": "^8.15.5",
"pug": "^3.0.3",
"undici": "^7.8.0"
@ -84,6 +87,32 @@
"node": ">=12"
}
},
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"license": "BSD-3-Clause",
"dependencies": {
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"https-proxy-agent": "^5.0.0",
"make-dir": "^3.1.0",
"node-fetch": "^2.6.7",
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"semver": "^7.3.5",
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},
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@ -109,6 +138,18 @@
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}
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"license": "MIT",
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@ -149,6 +190,26 @@
"node": ">= 8"
}
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"license": "ISC"
},
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"deprecated": "This package is no longer supported.",
"license": "ISC",
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@ -177,9 +238,22 @@
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"hasInstallScript": true,
"license": "MIT",
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},
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@ -217,7 +291,6 @@
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@ -237,6 +310,12 @@
"node": ">=8"
}
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"resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@ -309,6 +388,15 @@
"fsevents": "~2.3.2"
}
},
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"license": "ISC",
"engines": {
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}
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"resolved": "https://registry.npmjs.org/cliui/-/cliui-8.0.1.tgz",
@ -423,13 +511,27 @@
"dev": true,
"license": "MIT"
},
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"resolved": "https://registry.npmjs.org/color-support/-/color-support-1.1.3.tgz",
"integrity": "sha512-qiBjkpbMLO/HL68y+lh4q0/O1MZFj2RX6X/KmMa3+gJD3z+WwI1ZzDHysvqHGS3mP6mznPckpXmw1nI9cJjyRg==",
"license": "ISC",
"bin": {
"color-support": "bin.js"
}
},
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"resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
"integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==",
"dev": true,
"license": "MIT"
},
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"resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
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@ -470,6 +572,25 @@
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"license": "MIT",
"dependencies": {
"cookie": "0.7.2",
"cookie-signature": "1.0.6"
},
"engines": {
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}
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"license": "MIT"
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@ -511,6 +632,12 @@
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}
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"license": "MIT"
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@ -520,6 +647,15 @@
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"license": "Apache-2.0",
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@ -559,6 +695,15 @@
"dev": true,
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"node_modules/ecdsa-sig-formatter": {
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@ -743,6 +888,36 @@
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@ -767,6 +942,74 @@
"url": "https://github.com/sponsors/ljharb"
}
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@ -926,6 +1169,12 @@
"url": "https://github.com/sponsors/ljharb"
}
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"deprecated": "This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.",
"license": "ISC",
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"ansi-regex": "^5.0.1"
},
"engines": {
"node": ">=8"
}
},
"node_modules/with": {
"version": "7.0.2",
"resolved": "https://registry.npmjs.org/with/-/with-7.0.2.tgz",
@ -2395,6 +3044,12 @@
"node": ">=10"
}
},
"node_modules/yallist": {
"version": "4.0.0",
"resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
"integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
"license": "ISC"
},
"node_modules/yargs": {
"version": "17.7.2",
"resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",

3
package.json
View File

@ -15,8 +15,11 @@
"migrate": "bash migrate.sh"
},
"dependencies": {
"bcrypt": "^5.1.1",
"cookie-parser": "^1.4.7",
"dotenv": "^16.5.0",
"express": "^5.1.0",
"jsonwebtoken": "^9.0.2",
"pg": "^8.15.5",
"pug": "^3.0.3",
"undici": "^7.8.0"

78
public/js/index.js
View File

@ -1,25 +1,73 @@
window.onload = async () => {
let id = (await (await fetch("/api/captcha", {method: "POST"})).json()).id
if (id == undefined) {
alert("Service is unavailable now. Please, try again later.");
return;
const check_solution = async (solution) => {
const body = {
"TotalSum": "78278",
"FnNumber": "9960440301173139",
"ReceiptOperationType": "1",
"DocNumber": "35704",
"DocFiscalSign": "4149689833",
"Captcha": solution,
"DocDateTime": "2022-09-21T20:28:00.000Z"
}
console.log(id);
fetch(`/api/captcha/${id}`).then(response => response.blob())
.then(blob => {
const url = URL.createObjectURL(blob);
document.getElementById("captcha_image").src = url;
}
);
const result = await fetch("https://check.ofd.ru/Document/FetchReceiptFromFns", {
method: "POST",
headers: {
"Content-Type": "application/json;charset=utf-8",
// "Origin": "https://check.ofd.ru"
},
body: JSON.stringify(body),
});
return result.status != 400;
}
const get_cookie = (name) => {
const cookies = document.cookie.split(';');
for (let i = 0; i < cookies.length; i++) {
const cookie = cookies[i].trim();
if (cookie.startsWith(name + '=')) {
const value = cookie.substring(name.length + 1);
console.log(value);
}
}
}
const blobToBase64 = (blob) => {
return new Promise((resolve, _) => {
const reader = new FileReader();
reader.onloadend = () => resolve(reader.result);
reader.readAsDataURL(blob);
});
}
window.onload = async () => {
console.log("koka: " + get_cookie("JWT"));
console.log("all: " + document.cookie);
if (!document.cookie.includes('JWT')) {
document.location.href = "/login";
}
const response = await fetch("https://check.ofd.ru/api/captcha/common/img");
captcha = await response.blob();
const url = URL.createObjectURL(captcha);
document.getElementById("captcha_image").src = url;
console.log(captcha.type)
const form = document.getElementById("captchaForm");
const inputField = document.getElementById("captcha");
form.addEventListener('submit', async (e) => {
e.preventDefault();
// if (!await check_solution(inputField.value)) {
// alert("Капча решена неверно")
// returnl
// }
const response = await fetch(`/api/captcha/${id}`, {method: "PATCH",headers: {'Content-Type': 'application/json'}, body: JSON.stringify({"solution": inputField.value})});
const response = await fetch(`/api/captcha/submit`, {method: "POST", headers: {'Content-Type': 'application/json'}, body: JSON.stringify({ "image": await blobToBase64(captcha), "solution": inputField.value})});
if (response.status == 200) {
inputField.value = "";
window.location.reload();
};
})
} else {
response_json = await response.json()
alert(response_json.message)
}
});
};

48
public/js/login.js Normal file
View File

@ -0,0 +1,48 @@
const set_cookie = (name, value, days) => {
const expires = new Date(Date.now() + days * 86400 * 1000).toUTCString();
document.cookie = `${name}=${value}; expires=${expires}; path=/;`;
}
window.onload = async () => {
alert("This service requests a captcha from https://ofd.ru and sends an example receipt to it to check the correctness of the captcha. If you are not okay with making such requests, please leave the site immediately");
if (document.cookie.includes('JWT')) {
document.location = '/';
}
const form = document.getElementById("loginForm");
const username = document.getElementById("username");
const password = document.getElementById("password");
form.addEventListener('submit', async (e) => {
e.preventDefault();
const response = await fetch(
`/api/user/login`, {
method: "POST",
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
"username": username.value,
"password": password.value
})
});
switch (response.status) {
case 403:
alert("Incorrect password");
password.value = "";
break;
case 200:
response_json = await response.json()
set_cookie("JWT", response_json["token"], 365);
window.location.href = '/';
break;
case 404:
alert("No such user exists");
username.value = "";
break;
default:
alert("Unknown server error. Please, conact the developer");
console.log(response);
}
});
};

2
sample.env
View File

@ -9,3 +9,5 @@ DBPASS=GENERATE_A_STRONG_PASSWORD_HERE
APP_PORT=3000
CAPTCHA_SOURCE_URL=https://example.com
DATA_DIR=/opt/captcha_aggregator
ADMIN_TOKEN=GENERATE_A_STRONG_TOKEN_HERE
SECRET=GENERATE_A_STRONG_SECRET_HERE

4
src/config.js
View File

@ -14,7 +14,9 @@ const config = {
app_port: Number.parseInt(process.env.APP_PORT),
captcha_source_url: process.env.CAPTCHA_SOURCE_URL,
data_dir: process.env.DATA_DIR
data_dir: process.env.DATA_DIR,
admin_token: process.env.ADMIN_TOKEN,
secret: process.env.SECRET
}
export default config;

61
src/controllers/captcha.js
View File

@ -1,61 +1,18 @@
import CaptchaService from "../services/captcha.js";
import ProxyService from "../services/proxy.js";
import config from '../config.js';
import fs from 'fs/promises';
import jwt from 'jsonwebtoken';
class CaptchaController {
async new(req, res) {
async submit(req, res) {
const {image, solution} = req.body;
if (!image) return res.status(400).send({"message":"You must send image blob"});
if (!solution || solution.length != 6) return res.status(400).send({"message":"You must send a valid solution"});
try {
const proxy = await ProxyService.take();
console.log("Using proxy: " + JSON.stringify(proxy));
if (proxy == undefined) {
return res.status(503).send({"message":"No active proxy. please, try again later"});
}
const id = await CaptchaService.new(proxy);
return res.status(200).send({"id": id});
} catch (e) {
console.log(e);
return res.status(500).send({"message": "Unknown server error"});
}
}
async get(req, res) {
try {
const id = req.params.id;
if (id == undefined || parseInt(id) == NaN) {
return res.status(404).send({"message": "captcha not found"});
}
const hash = await CaptchaService.get(id);
const image = await fs.readFile(`${config.data_dir}/${hash}.jpeg`);
return res.status(200).send(image)
await CaptchaService.new(image, solution, jwt.decode(req.token).id);
} catch (e) {
console.log(e)
return res.status(500).send({"message": "Unknown server error"});
}
}
async solve (req, res) {
try {
const id = req.params.id;
const solution = req.body["solution"];
if (solution == undefined || solution.length != 6) {
return res.status(400).send({"message": 'please, send a valid solution. Example: {"solution":"123456"}'});
}
let proxy = await CaptchaService.get_assigned_proxy(id);
if (!await CaptchaService.check_and_save_solution(id, solution, proxy))
return res.status(409).send({"message": "Solution is not correct"});
await ProxyService.give_back(proxy.id);
return res.status(200).send({"message": "Successful"});
} catch (e) {
console.log(e)
return res.status(500).send({"message": "Unknown server error"});
console.log(`Error upon submitting: ${e}`);
return res.status(500).send({"message": "Unknown server error. Please, contact the developer."});
}
return res.status(200).send({"message": "Success"});
}
}

31
src/controllers/proxy.js
View File

@ -1,31 +0,0 @@
import ProxyService from '../services/proxy.js';
class CaptchaController {
async add(req, res) {
try {
const { proto, host, port, username, password } = req.body;
if (!proto || !host || !port) return res.status(400).send({"message":"You must specify proto, host and port!"});
const id = await ProxyService.add(proto, host, port, username, password);
return res.status(200).send({"id": id});
} catch (e) {
console.log(e)
return res.status(500).send({"message": "Unknown server error"});
}
}
async delete (req, res) {
try {
const id = req.params.id;
await ProxyService.delete(id)
return res.status(200).send({"message": "Successful"});
} catch (e) {
console.log(e)
return res.status(500).send({"message": "Unknown server error"});
}
}
}
export default new CaptchaController();

39
src/controllers/user.js Normal file
View File

@ -0,0 +1,39 @@
import UserService from '../services/user.js';
import jwt from 'jsonwebtoken';
import bcrypt from 'bcrypt';
import config from '../config.js';
class UserController {
async register(req, res) {
try {
const { username, password } = req.body;
if (!username) return res.status(400).send({"message":"You must specify username"});
if (!password) return res.status(400).send({"message":"You must specify password"});
if (await UserService.get_by_username(username)) return res.status(409).send({"message":"Such user already exists!"})
const id = await UserService.add(username, bcrypt.hashSync(password, 10));
const token = jwt.sign({"username": username, "id": id}, config.secret);
return res.status(200).send({"messae": "Success", "token": token});
} catch (e) {
console.log(e)
return res.status(500).send({"message": "Unknown server error. Please, contact the developer"});
}
}
async login (req, res) {
try {
const { username, password } = req.body;
const user = await UserService.get_by_username(username);
if (!user) return res.status(404).send({"message":"No such user exists"});
const hashed_password = user.password;
if (!bcrypt.compareSync(password, hashed_password)) return res.status(403).send({"message":"Passwords dont match"});
const token = jwt.sign({"username": username, "id": user.id}, config.secret);
return res.status(200).send({"message": "Success", "token": token});
} catch (e) {
console.log(e)
return res.status(500).send({"message": "Unknown server error"});
}
}
}
export default new UserController();

4
src/index.js
View File

@ -1,20 +1,24 @@
import express from 'express';
import path from 'path';
import cookieParser from 'cookie-parser';
import CaptchaRouter from './routers/captcha.js';
import FrontendRouter from './routers/frontend.js';
import config from './config.js';
import UserRouter from './routers/user.js';
const app = express();
app.use(express.static(path.join('./public')));
app.use(express.urlencoded({ extended: false }));
app.use(express.json());
app.use(cookieParser());
app.set('view engine', 'pug');
app.use('/api', CaptchaRouter);
app.use('/api', UserRouter);
app.use('/', FrontendRouter);
const server = app.listen(config.app_port, () => {

20
src/middlewares/auth.js Normal file
View File

@ -0,0 +1,20 @@
import jwt from 'jsonwebtoken';
import config from '../config.js';
const verify_admin_token = async (req, res, next) => {
const header = req.headers['authorization'];
if (!header) return res.status(400).send({"message": "No admin token supplied"});
if (config.admin_token != header.split(' ')[1]) return res.status(403).send({"message":"Admin token is incorrect"});
next();
}
const verify_user_jwt = async (req, res, next) => {
const header = req.headers['authorization'];
let token = req.cookies.JWT? req.cookies.JWT : (header? header.split(' ')[1] : undefined)
if (!token) return res.status(400).send({"message": "No authorization token supplied"});
req.token = token;
if (!jwt.verify(req.token, config.secret)) return res.status(403).send({"message":"Could not verify authorization token"});
next();
}
export default {verify_admin_token, verify_user_jwt};

5
src/routers/captcha.js
View File

@ -1,11 +1,10 @@
import { Router } from 'express';
import CaptchaController from '../controllers/captcha.js';
import auth from '../middlewares/auth.js';
const CaptchaRouter = new Router();
CaptchaRouter.post('/captcha', CaptchaController.new);
CaptchaRouter.get('/captcha/:id', CaptchaController.get);
CaptchaRouter.patch('/captcha/:id', CaptchaController.solve);
CaptchaRouter.post('/captcha/submit', auth.verify_user_jwt, CaptchaController.submit);
export default CaptchaRouter;

4
src/routers/frontend.js
View File

@ -6,4 +6,8 @@ FrontendRouter.get('/', async (req, res) => {
return res.render("index.pug");
});
FrontendRouter.get('/login', async (req, res) => {
return res.render("login.pug");
});
export default FrontendRouter;

11
src/routers/proxy.js
View File

@ -1,11 +0,0 @@
import { Router } from 'express';
import ProxyController from '../controllers/proxy.js';
const ProxyRouter = new Router();
ProxyRouter.post('/proxy', ProxyController.add);
ProxyRouter.get('/proxy/:id', ProxyController.get);
ProxyRouter.patch('/captcha/:id', ProxyController.solve);
export default ProxyRouter;

11
src/routers/user.js Normal file
View File

@ -0,0 +1,11 @@
import { Router } from 'express';
import UserController from '../controllers/user.js';
import auth from '../middlewares/auth.js';
const UserRouter = new Router();
UserRouter.post('/user/register', auth.verify_admin_token, UserController.register);
UserRouter.post('/user/login', UserController.login);
export default UserRouter;

74
src/services/captcha.js
View File

@ -1,69 +1,25 @@
import db from '../db.js';
import fs from 'fs/promises';
import { ProxyAgent } from 'undici';
import config from '../config.js';
import { createHash } from 'crypto';
function base64ToArrayBuffer(base64) {
var binaryString = atob(base64);
var bytes = new Uint8Array(binaryString.length);
for (var i = 0; i < binaryString.length; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
return bytes.buffer;
}
class CaptchaService {
async new(proxy) {
try {
let dispatcher = new ProxyAgent(`${proxy.proto}://${proxy.username? proxy.username + "@" + proxy.password + ":" : ""}${proxy.host}:${proxy.port}`);
const captcha = await (await fetch(config.captcha_source_url, {dispatcher})).blob();
const buffer = Buffer.from(await captcha.arrayBuffer());
const hash = createHash('md5').update(buffer).digest('hex');
await fs.writeFile(`${config.data_dir}/${hash}.jpeg`, buffer);
const id = (await db.query("INSERT INTO captchas (hash, proxy_id) VALUES ($1, $2) RETURNING id", [hash, proxy.id])).rows[0].id;
return id
} catch(e) {
console.log(e);
}
}
async check_solution(solution, proxy) {
let dispatcher = new ProxyAgent(`${proxy.proto}://${proxy.username? proxy.username + "@" + proxy.password + ":" : ""}${proxy.host}:${proxy.port}`);
const body = {
"TotalSum": "78278",
"FnNumber": "9960440301173139",
"ReceiptOperationType": "1",
"DocNumber": "35704",
"DocFiscalSign": "4149689833",
"Captcha": solution,
"DocDateTime": "2022-09-21T20:28:00.000Z"
}
const result = await fetch("https://check.ofd.ru/Document/FetchReceiptFromFns", {
"headers": {
"Content-Type": "application/json;charset=utf-8"
},
dispatcher,
"body": JSON.stringify(body),
"method": "POST",
});
return result.status != 400;
}
async get (id) {
let result = await db.query("SELECT hash FROM captchas WHERE id = $1", [id])
if (result.rows[0] == undefined) {
return undefined;
}
return result.rows[0].hash;
}
async check_and_save_solution (id, solution, proxy) {
if (!await this.check_solution(solution, proxy)) {
return false;
}
await db.query("UPDATE captchas SET solution = $1 WHERE id = $2", [solution, id]);
return true;
}
async get_assigned_proxy(id) {
return (await db.query("select proxies.id, proto, host, port, username, password from proxies JOIN captchas on proxy_id = proxies.id WHERE captchas.id = $1", [id])).rows[0];
async new(image, solution, submitter) {
const b64 = image.replace(/^data:image\/jpeg;base64,/, "");
const arrayBuffer = base64ToArrayBuffer(b64);
const buffer = Buffer.from(arrayBuffer);
const hash = createHash('md5').update(buffer).digest('hex');
await fs.writeFile(`${config.data_dir}/${hash}.jpeg`, b64, 'base64');
await db.query("INSERT INTO captchas (hash, solution, submitter) VALUES ($1, $2, $3)", [hash, solution, submitter]);
}
}

42
src/services/proxy.js
View File

@ -1,42 +0,0 @@
import db from '../db.js';
import { ProxyAgent } from 'undici';
class ProxyService {
async add(proto, host, port, username, password) {
await db.query("INSERT INTO proxies (proto, host, port, username, password) VALUES ($1, $2, $3, $4, $5)", [proto, host, port, username, password]);
}
async take() {
// while (true) {
let proxy = (await db.query("UPDATE proxies SET claimed = TRUE WHERE id = ( SELECT id FROM proxies WHERE claimed = FALSE ORDER BY id LIMIT 1 ) RETURNING id, proto, host, port, username, password")).rows[0]
return proxy == undefined? undefined : proxy;
// console.log("testing proxy")
// if (await this.check_connection(proxy)) return proxy;
// else await this.delete(proxy.id)
// console.log("Proxy failed and deleted")
// }
}
// async check_connection(proxy) {
// const dispatcher = new ProxyAgent(`${proxy.proto}://${proxy.username? proxy.username + "@" + proxy.password + ":" : ""}${proxy.host}:${proxy.port}`);
// let response;
// try {
// response = await fetch("https://google.com", {dispatcher})
// } catch (e) {
// console.log(`Error on testing the proxy`)
// return false
// }
// return response.status == 200;
// }
async give_back(id) {
await db.query("UPDATE proxies SET claimed = false WHERE id = $1", [id]);
}
async delete(id) {
await db.query("DELETE FROM proxies WHERE id = $1", [id]);
}
}
export default new ProxyService();

13
src/services/user.js Normal file
View File

@ -0,0 +1,13 @@
import db from '../db.js';
class UserService {
async add(username, password) {
return (await db.query("INSERT INTO users (username, password) VALUES ($1, $2) RETURNING id", [username, password])).rows[0].id;
}
async get_by_username(username) {
return (await db.query("SELECT * FROM users WHERE username = $1", [username])).rows[0];
}
}
export default new UserService();

23
views/login.pug Normal file
View File

@ -0,0 +1,23 @@
html
head
title Captcha Aggregator Login
meta(charset="utf-8")
meta(name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no")
meta(name="description" content="")
link(href="css/index.css" rel="stylesheet")
body
div(id="tsparticles")
main(class="box")
h2 Captcha Aggregator
form(id="loginForm")
div(class="inputBox")
label(for="username") Username
input(id="username" placeholder="username" required=true)
div(class="inputBox")
label(for="password") Password
input(type="password" name="password" id="password" placeholder="password" required=true)
div
button(type="submit" name="" style="float: center;") Log in
script(type="text/javascript" src="js/login.js")