{"id":41931,"library":"sans-server","title":"Sans Server","description":"Sans Server is a serverless framework that enables writing server-side code for a Connect-style request/response middleware pipeline without requiring an actual HTTP server. It is designed to simplify testing and development of middleware in a Node.js environment, with a current version of 2.0.3. Key differentiators include its focus on a Connect-compatible API and its ability to run middleware in isolation, reducing the need for server dependencies. Release cadence is low; the package has not been updated frequently in recent years.","status":"maintenance","version":"2.0.3","language":"javascript","source_language":"en","source_url":"https://github.com/byu-oit/sans-server","tags":["javascript","server","serverless","connect","request","response","middleware"],"install":[{"cmd":"npm install sans-server","lang":"bash","label":"npm"},{"cmd":"yarn add sans-server","lang":"bash","label":"yarn"},{"cmd":"pnpm add sans-server","lang":"bash","label":"pnpm"}],"dependencies":[],"imports":[{"note":"Default ES module import. CJS require works but may have issues with TypeScript typings.","wrong":"const SansServer = require('sans-server')","symbol":"SansServer","correct":"import SansServer from 'sans-server'"},{"note":"Named export for the Request class. Avoid using the default import's property.","wrong":"import SansServer from 'sans-server'; const Request = SansServer.Request;","symbol":"SansServer.Request","correct":"import { Request } from 'sans-server'"},{"note":"Named export for the Response class. Preferred over accessing via default import.","wrong":"import SansServer from 'sans-server'; const Response = SansServer.Response;","symbol":"SansServer.Response","correct":"import { Response } from 'sans-server'"},{"note":"Function exported as a named export. Use ES module syntax for clarity.","wrong":"const createServer = require('sans-server').createServer","symbol":"SansServer.createServer","correct":"import { createServer } from 'sans-server'"}],"quickstart":{"code":"import SansServer, { createServer, Request, Response } from 'sans-server';\n\nconst server = new SansServer();\n\n// Add middleware\nserver.use('/api', (req, res) => {\n  res.status(200).json({ message: 'Hello World' });\n});\n\n// Create a request\nconst req = new Request({\n  method: 'GET',\n  url: '/api',\n  headers: {}\n});\n\nconst res = new Response();\n\n// Process the request through middleware\nserver.execute(req, res).then(() => {\n  console.log(res.statusCode); // 200\n  console.log(res.body); // {\"message\":\"Hello World\"}\n});","lang":"typescript","description":"Shows how to create a SansServer instance, add middleware, and simulate a request/response cycle programmatically without an HTTP server."},"warnings":[{"fix":"Consider migrating to a more actively maintained alternative like Express or a serverless framework.","message":"SansServer is no longer actively maintained. It may not receive updates for security or compatibility.","severity":"deprecated","affected_versions":">=2.0.0"},{"fix":"Use async/await or .then() on the result of server.execute().","message":"The 'execute' method returns a Promise, but older documentation may suggest callbacks. Ensure you handle the promise correctly.","severity":"gotcha","affected_versions":">=2.0.0"},{"fix":"Use multiple middleware to buffer the request body if needed.","message":"SansServer does not support streaming request bodies. All request data must be fully buffered before processing.","severity":"gotcha","affected_versions":">=2.0.0"}],"env_vars":null,"search_vec":"'2.0.3':49 'abil':63 'actual':27 'api':60 'cadenc':76 'code':15 'compat':59 'connect':19,58,92 'connect-compat':57 'connect-styl':18 'current':46 'depend':74 'design':32 'develop':37 'differenti':51 'enabl':10 'environ':43 'focus':54 'framework':8 'frequent':85 'http':28 'includ':52 'isol':68 'javascript':89 'key':50 'low':78 'middlewar':22,39,66,95 'need':71 'node.js':42 'packag':80 'pipelin':23 'recent':87 'reduc':69 'releas':75 'request':93 'request/response':21 'requir':25 'respons':94 'run':65 'san':1,3 'server':2,4,13,29,73,90 'server-sid':12 'serverless':7,91 'side':14 'simplifi':34 'style':20 'test':35 'updat':84 'version':47 'without':24 'write':11 'year':88","created_at":"2026-06-04T18:54:48.301792+00:00","updated_at":"2026-06-04T18:54:48.301792+00:00","problems":[{"fix":"Use import SansServer from 'sans-server' for ES modules. If using CJS, use const SansServer = require('sans-server').default or use a bundler.","cause":"Using CJS require with a default import style.","error":"TypeError: SansServer is not a constructor"},{"fix":"Run npm install sans-server and ensure your import path is correct (e.g., 'sans-server' not './sans-server').","cause":"Package not installed or import path incorrect.","error":"Cannot find module 'sans-server'"},{"fix":"Always pass a method in the request options, e.g., new Request({ method: 'GET', url: '/' }).","cause":"Creating a Request without specifying method property.","error":"req.method is undefined"}],"ecosystem":"npm","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"https://github.com/byu-oit/sans-server#readme","github":"https://github.com/byu-oit/sans-server","docs":null,"changelog":null,"pypi":null,"npm":"sans-server","openapi_spec":null,"status_page":null,"smithery":null,"categories":["devops"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-04","next_check":"2026-09-02","install_tag":null}}