backend.im/realtimechatapiwithmediasupport-t50lz6

Automated Action 545563e776 Implement comprehensive real-time chat API with NestJS

- Complete NestJS TypeScript implementation with WebSocket support
- Direct messaging (DM) and group chat functionality
- End-to-end encryption with AES encryption and key pairs
- Media file support (images, videos, audio, documents) up to 100MB
- Push notifications with Firebase Cloud Messaging integration
- Mention alerts and real-time typing indicators
- User authentication with JWT and Passport
- SQLite database with TypeORM entities and relationships
- Comprehensive API documentation with Swagger/OpenAPI
- File upload handling with secure access control
- Online/offline status tracking and presence management
- Message editing, deletion, and reply functionality
- Notification management with automatic cleanup
- Health check endpoint for monitoring
- CORS configuration for cross-origin requests
- Environment-based configuration management
- Structured for Flutter SDK integration

Features implemented:
✅ Real-time messaging with Socket.IO
✅ User registration and authentication
✅ Direct messages and group chats
✅ Media file uploads and management
✅ End-to-end encryption
✅ Push notifications
✅ Mention alerts
✅ Typing indicators
✅ Message read receipts
✅ Online status tracking
✅ File access control
✅ Comprehensive API documentation

Ready for Flutter SDK development and production deployment.

2025-06-21 17:13:05 +00:00

1.9 KiB

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Buffer From

A ponyfill for Buffer.from, uses native implementation if available.

Installation

npm install --save buffer-from

Usage

const bufferFrom = require('buffer-from')

console.log(bufferFrom([1, 2, 3, 4]))
//=> <Buffer 01 02 03 04>

const arr = new Uint8Array([1, 2, 3, 4])
console.log(bufferFrom(arr.buffer, 1, 2))
//=> <Buffer 02 03>

console.log(bufferFrom('test', 'utf8'))
//=> <Buffer 74 65 73 74>

const buf = bufferFrom('test')
console.log(bufferFrom(buf))
//=> <Buffer 74 65 73 74>

API

bufferFrom(array)

array <Array>

Allocates a new Buffer using an array of octets.

bufferFrom(arrayBuffer[, byteOffset[, length]])

arrayBuffer <ArrayBuffer> The .buffer property of a TypedArray or ArrayBuffer
byteOffset <Integer> Where to start copying from arrayBuffer. Default: 0
length <Integer> How many bytes to copy from arrayBuffer. Default: arrayBuffer.length - byteOffset

When passed a reference to the .buffer property of a TypedArray instance, the newly created Buffer will share the same allocated memory as the TypedArray.

The optional byteOffset and length arguments specify a memory range within the arrayBuffer that will be shared by the Buffer.

bufferFrom(buffer)

buffer <Buffer> An existing Buffer to copy data from

Copies the passed buffer data onto a new Buffer instance.

bufferFrom(string[, encoding])

string <String> A string to encode.
encoding <String> The encoding of string. Default: 'utf8'

Creates a new Buffer containing the given JavaScript string string. If provided, the encoding parameter identifies the character encoding of string.

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