Implement different backend types

Including to the previous flatfile storage, a new storage for MySQL has
been added to store polls in a database.
The amount of possible Poll Options has also been reduced to 20.
This commit is contained in:
Wolvan 2022-01-08 14:32:25 +01:00
parent df5b3e5c10
commit 0545d90c3f
8 changed files with 329 additions and 18 deletions

194
package-lock.json generated
View file

@ -13,6 +13,7 @@
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@ -5351,6 +5519,11 @@
"ipaddr.js": "1.9.1"
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},
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@ -5522,6 +5695,11 @@
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@ -5584,6 +5762,11 @@
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@ -5918,8 +6101,7 @@
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@ -64,6 +64,7 @@
"compression": "^1.7.4",
"cookie-parser": "^1.4.6",
"express": "^4.17.2",
"mysql2": "^2.3.3",
"node-fetch": "^2.6.6",
"node-persist": "^3.1.0"
}

View file

@ -1,4 +1,4 @@
"use strict";
export const MAX_POLL_OPTIONS = 255;
export const MAX_POLL_OPTIONS = 20;
export const MAX_CHARACTER_LENGTH = 300;

27
src/FlatFileStorage.ts Normal file
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@ -0,0 +1,27 @@
"use strict";
import Storage from "./Storage";
import persist from "node-persist";
import { BackendPoll as Poll } from "./Poll";
export default class FlatFileStorage extends Storage {
#storage: persist.LocalStorage;
constructor(options: persist.InitOptions) {
super();
console.debug("Initiating FlatFileStorage.");
this.#storage = persist.create(options);
}
async init() {
await this.#storage.init();
return this;
}
getItem(key: string): Promise<Poll> {
return this.#storage.getItem(key);
}
setItem(key: string, value: Poll, options?: persist.DatumOptions): Promise<persist.WriteFileResult> {
return this.#storage.setItem(key, value, options);
}
}

80
src/MySQLStorage.ts Normal file
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@ -0,0 +1,80 @@
"use strict";
import Storage from "./Storage";
import mysql from "mysql2";
import { MAX_CHARACTER_LENGTH } from "./Config";
import { BackendPoll as Poll } from "./Poll";
export default class MySQLStorage extends Storage {
#db: mysql.Connection;
constructor(options: mysql.ConnectionOptions) {
super();
console.debug("Initiating MySQLStorage.");
this.#db = mysql.createConnection(options);
}
async init(): Promise<this> {
await this.#db.promise().connect();
await this.#db.promise().query(`
CREATE TABLE IF NOT EXISTS polls (
id INT AUTO_INCREMENT PRIMARY KEY,
id_str VARCHAR(32) NOT NULL UNIQUE,
title VARCHAR(${MAX_CHARACTER_LENGTH}) NOT NULL DEFAULT '',
dupe_check_mode ENUM('none', 'ip', 'cookie') NOT NULL DEFAULT 'ip',
multi_select TINYINT(1) NOT NULL DEFAULT 0,
captcha TINYINT(1) NOT NULL DEFAULT 0,
creation_time DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
dupe_data VARCHAR(8000) DEFAULT '[]',
options VARCHAR(32000) NOT NULL DEFAULT '{}',
deleted_at DATETIME DEFAULT NULL,
updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=INNODB;
`);
return this;
}
async getItem(key: string): Promise<Poll|null> {
const [rows] = await this.#db.promise().execute("SELECT * FROM polls WHERE id_str = ? AND deleted_at IS NULL;", [key]);
if (!rows || !Array.isArray(rows) || !rows.length) return null;
const row = rows[0] as {
id_str: string,
title: string,
dupe_check_mode: "none" | "ip" | "cookie",
multi_select: number,
captcha: number,
creation_time: string,
dupe_data: string,
options: string
};
return {
id: row.id_str,
title: row.title,
dupeCheckMode: row.dupe_check_mode,
multiSelect: !!row.multi_select,
captcha: !!row.captcha,
creationTime: new Date(row.creation_time),
dupeData: JSON.parse(row.dupe_data),
options: JSON.parse(row.options)
};
}
async setItem(key: string, value: Poll): Promise<void> {
await this.#db.promise().execute(`
INSERT INTO polls
(id_str, title, dupe_check_mode, multi_select, captcha, dupe_data, options, creation_time)
VALUES (?, ?, ?, ?, ?, ?, ?, ?)
ON DUPLICATE KEY UPDATE
dupe_data = VALUES(dupe_data),
options = VALUES(options);
`, [
key,
value.title,
value.dupeCheckMode,
value.multiSelect,
value.captcha,
JSON.stringify(value.dupeData),
JSON.stringify(value.options),
value.creationTime.toISOString()
]);
}
}

7
src/Storage.ts Normal file
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@ -0,0 +1,7 @@
"use strict";
export default abstract class Storage {
abstract init(): Promise<this>;
abstract getItem(key: string): Promise<any>;
abstract setItem(key: string, value: any): Promise<any>;
}

View file

@ -1,11 +1,9 @@
"use strict";
import { CookieOptions, Router } from "express";
import persist from "node-persist";
import { program } from "commander";
import { resolve } from "path";
import { BackendPoll as Poll, DupeCheckMode } from "./Poll";
import { MAX_POLL_OPTIONS, MAX_CHARACTER_LENGTH } from "./Config";
import Storage from "./Storage";
function randomString(length = 10, charset = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789") {
let result = "";
@ -15,12 +13,7 @@ function randomString(length = 10, charset = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKL
return result;
}
export default async function init(router: Router): Promise<void> {
const polls = await persist.create({
dir: resolve(process.cwd(), program.opts().dataDirectory)
});
await polls.init();
export default async function init(router: Router, polls: Storage): Promise<void> {
router.get("/poll/:id", async (req, res) => {
try {
const id = req.params.id;
@ -75,7 +68,6 @@ export default async function init(router: Router): Promise<void> {
let id = randomString(8);
while (await polls.getItem(id)) id = randomString(6);
await polls.setItem(id, {});
const dupeCheckMode = (
["none", "ip", "cookie"].includes((pollData.dupeCheckMode || "").toLowerCase()) ?

View file

@ -6,6 +6,9 @@ import express from "express";
import compression from "compression";
import cookiepaser from "cookie-parser";
import { resolve } from "path";
import FlatFileStorage from "./FlatFileStorage";
import Storage from "./Storage";
import MySQLStorage from "./MySQLStorage";
async function main(): Promise<void> {
await loadConfig([
@ -13,6 +16,13 @@ async function main(): Promise<void> {
["--no-backend", "Do not start the backend server"],
["-d, --data-directory <path>", "Path to the data directory", "./data"],
["-p, --port <port>", "Port to listen on", (port: any) => parseInt(port), 6969],
["--use-mysql", "Use MySQL for storage"],
["--mysql-host <host>", "MySQL host", "localhost"],
["--mysql-port <port>", "MySQL port", (port: any) => parseInt(port), 3306],
["--mysql-user <user>", "MySQL user", "root"],
["--mysql-password <password>", "MySQL password", "root"],
["--mysql-database <database>", "MySQL database", "polls"],
["--mysql-ssl", "Use SSL for MySQL connection"],
["--backend-base-url <url>", "Base URL for the backend server", null],
], ".poll-horse-config");
const opts = program.opts();
@ -23,12 +33,24 @@ async function main(): Promise<void> {
app.use(compression());
app.use(cookiepaser());
const storage: Storage = (opts.useMysql) ?
new MySQLStorage({
host: opts.mysqlHost,
port: opts.mysqlPort,
user: opts.mysqlUser,
password: opts.mysqlPassword,
database: opts.mysqlDatabase,
ssl: opts.mysqlSsl
}) :
new FlatFileStorage({ dir: resolve(process.cwd(), program.opts().dataDirectory) });
await storage.init();
if (opts.backend) {
console.log(`Mounting backend`);
const backendRouter = express.Router();
const backend = await import("./backend");
await backend.default(backendRouter);
await backend.default(backendRouter, storage);
app.use("/_backend/", backendRouter);
}