commit 7819fcc36a5c6fed4e4a39ea94a67d5754ac36c1 Author: Stevan Freeborn <65925598+StevanFreeborn@users.noreply.github.com> Date: Wed Aug 12 18:22:42 2026 -0500 chore: initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..1687d79 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +node_modules/ +config.json diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..5b98c14 --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,19 @@ +Copyright (c) 2026 Stevan Freeborn + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/README.md b/README.md new file mode 100644 index 0000000..3500d24 --- /dev/null +++ b/README.md @@ -0,0 +1,27 @@ +# sftp_testing + +A scratch project for troubleshooting and debugging the behavior of parallel SSH/SFTP connections to target machines using the `ssh2-sftp-client` npm library. + +## What it does + +`index.ts` spawns 6 worker threads concurrently. Each worker connects to an SFTP server, uploads `test.txt` as `-test.txt`, then deletes the remote file. The goal is to reproduce and inspect issues that arise when many connections are opened against a target host at the same time. + +## Setup + +```bash +npm install +cp config.example.json config.json +``` + +Then fill in `config.json` with real credentials. Multiple profiles are supported; pass a profile name as the first CLI argument (defaults to `default`): + +```bash +npx tsx index.ts +npx tsx index.ts ftp.stevanfreeborn.com +``` + +## Notes + +- Connection settings (host, port, username, password) are loaded from `config.json`. +- Each worker runs the same upload/delete sequence independently against the same target. +- On success, the main thread prints: `All workers completed execution successfully.` diff --git a/config.example.json b/config.example.json new file mode 100644 index 0000000..f96dc23 --- /dev/null +++ b/config.example.json @@ -0,0 +1,22 @@ +{ + "profiles": { + "freeborn.cloud": { + "host": "ssh.freeborn.cloud", + "port": 22, + "username": "your-username", + "password": "your-password" + }, + "ftp.stevanfreeborn.com": { + "host": "ftp.stevanfreeborn.com", + "port": 22, + "username": "your-username", + "password": "your-password" + }, + "default": { + "host": "64.181.222.218", + "port": 22, + "username": "your-username", + "password": "your-password" + } + } +} diff --git a/index.ts b/index.ts new file mode 100644 index 0000000..14bdfde --- /dev/null +++ b/index.ts @@ -0,0 +1,145 @@ +import Client from "ssh2-sftp-client"; +import { readFileSync } from "node:fs"; +import process from "node:process"; +import { Worker, isMainThread, workerData } from "node:worker_threads"; + +type Config = { + host: string; + port: number; + username: string; + password: string; +}; + +type Profiles = Record; + +type ConfigFile = { + profiles: Profiles; +}; + +const CONFIG_PATH = new URL("./config.json", import.meta.url); + +function loadConfig(configArg?: string): Config { + let configFile: ConfigFile; + + try { + configFile = JSON.parse(readFileSync(CONFIG_PATH, "utf-8")) as ConfigFile; + } catch (error) { + throw new Error( + `Could not read config file at ${CONFIG_PATH.href}. Copy config.example.json to config.json and fill in your credentials.`, + ); + } + + const profiles = configFile.profiles ?? {}; + const profileName = configArg ?? "default"; + const config = profiles[profileName]; + + if (!config) { + throw new Error( + `Unknown profile "${profileName}". Available profiles: ${Object.keys(profiles).join(", ")}`, + ); + } + + if (!config.host || !config.username || !config.password) { + throw new Error( + `Profile "${profileName}" is missing host, username, or password in config.json.`, + ); + } + + return { ...config, port: Number(config.port) || 22 }; +} + +class SftpService { + private readonly config: Config; + + constructor(config: Config) { + this.config = config; + } + + async uploadFile(sourcePath: string, remotePath: string) { + const client = new Client(); + + try { + await client.connect(this.config); + await client.put(sourcePath, remotePath); + } catch (error) { + if (error instanceof Error) { + console.error(error.message); + } + } finally { + await client.end(); + } + } + + async deleteFile(remotePath: string) { + const client = new Client(); + + try { + await client.connect(this.config); + await client.delete(remotePath); + } catch (error) { + if (error instanceof Error) { + console.error(error.message); + } + } finally { + await client.end(); + } + } +} + +function runWorker(runIndex: number, configArg?: string): Promise { + return new Promise((resolve, reject) => { + const worker = new Worker(new URL(import.meta.url), { + workerData: { runIndex, configArg }, + }); + + worker.on("exit", (code) => { + if (code !== 0) { + reject(new Error(`Worker ${runIndex} exited with code ${code}`)); + } else { + resolve(); + } + }); + + worker.on("error", (err) => reject(err)); + }); +} + +async function executeIteration(runIndex: number, configArg?: string) { + const sftp = new SftpService(loadConfig(configArg)); + + const remotePath = `./${runIndex}-test.txt`; + const sourcePath = "./test.txt"; + + console.log(`[Worker ${runIndex}] Starting run number ${runIndex}`); + + console.log(`[Worker ${runIndex}] Uploading file...`); + await sftp.uploadFile(sourcePath, remotePath); + console.log(`[Worker ${runIndex}] File uploaded`); + + console.log(`[Worker ${runIndex}] Deleting file...`); + await sftp.deleteFile(remotePath); + console.log(`[Worker ${runIndex}] File deleted`); +} + +async function main() { + if (isMainThread) { + const configArg = process.argv[2]; + const TOTAL_RUNS = 6; + + console.log(`[Main] Spawning ${TOTAL_RUNS} parallel workers...`); + + const workerPromises: Promise[] = []; + + for (let i = 0; i < TOTAL_RUNS; i++) { + workerPromises.push(runWorker(i, configArg)); + } + + await Promise.all(workerPromises); + console.log("[Main] All workers completed execution successfully."); + } else { + const { runIndex, configArg } = workerData; + await executeIteration(runIndex, configArg); + } +} + +await main(); diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..060d30b --- /dev/null +++ b/package-lock.json @@ -0,0 +1,588 @@ +{ + "name": "sftp_testing", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "sftp_testing", + "version": "1.0.0", + "license": "ISC", + "dependencies": { + 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