Modules

Bnlang ships with a batteries-included standard library — file I/O, HTTP server and client, templating, four database drivers, crypto, WebSockets, and more. Every module on this page is importable out of the box, no installation needed:

import "io"   as io;
import "web"  as web;
import "json" as json;

Every module also has a Bangla alias — import "ফাইল", import "ওয়েব", import "জেসন" resolve to the same Module instances. See Bilingual aliases for the full mapping.

Core

Module	Purpose
`sys`	Process info — argv, env, cwd, exit.
`io`	File I/O — sync, async, and streaming.
`path`	Cross-platform path manipulation.
`timers`	`set` / `interval` for deferred and repeated callbacks.
`time`	Clocks, calendar conversion, ISO 8601.

Asynchronous

Module	Purpose
`Future`	Built-in async value + `wait` keyword. The primary way to compose async work.

Utilities

Module	Purpose
`log`	Leveled logging.
`dotenv`	Parse `.env` files.
`cli`	Declarative CLI argument parsing.
`uuid`	Generate and validate UUIDs.

Data

Module	Purpose
`json`	Encode and decode JSON.
`csv`	Parse and emit CSV.
`regex`	Regular expression matching, replacement, splitting.

Crypto, math, compression

Module	Purpose
`crypto`	Hashing, HMAC, base64/hex, secure random.
`random`	Non-cryptographic RNG.
`math`	Trig, logs, rounding, list aggregations.
`zlib`	gzip / deflate compression.

Network (low level)

Module	Purpose
`net`	TCP sockets.
`dns`	Hostname resolution and reverse lookup.
`tls`	TLS-encrypted sockets.
`url`	URL parsing and query-string serialization.

HTTP / Web

Module	Purpose
`web`	HTTP/HTTPS server framework with routing and middleware.
`request`	Axios-style HTTP client.
`ws`	WebSocket server.
`cookie`	Parse and build cookies and `Set-Cookie` headers.
`session`	Session middleware.
`multipart`	`multipart/form-data` encode/decode.
`template`	Jinja-flavored template engine.

Database

Module	Purpose
`sqlite`	Embedded SQLite.
`pg`	PostgreSQL client.
`mysql`	MySQL / MariaDB client.
`mongo`	MongoDB client.

Process & test

Module	Purpose
`exec`	Spawn child processes.
`test`	Built-in test framework.