23/resumable.js
Resumable.js
resumable.js es una biblioteca de JavaScript para gestionar la carga de archivos grandes utilizando la API de archivos de HTML5. Funciona como un transmisor de datos fragmentados y gestor de cargas reanudables, dividiendo los archivos en segmentos más pequeños para asegurar una entrega confiable al servidor remoto.
La biblioteca se distingue por su capacidad para recuperar el progreso de la carga tras interrupciones de red o reinicios del navegador. Esto se logra mediante la transferencia de datos reanudable y la verificación de fragmentos en el servidor, que comprueba los segmentos existentes para evitar la transmisión redundante de datos.
El sistema gestiona cargas de archivos concurrentes y colas de solicitudes para optimizar el ancho de banda. Incluye capacidades para el control del estado de carga —permitiendo a los usuarios pausar, reanudar o cancelar transferencias— y seguimiento del progreso basado en eventos para archivos individuales y lotes. Además, proporciona primitivas para vincular la captura de archivos a elementos HTML mediante botones de exploración e interfaces de arrastrar y soltar.
Features
- Large File Uploads - Handles the transmission of very large files by splitting them into chunks to avoid timeout and memory issues.
- Stateful Multipart Uploads - Provides a stateful upload system that allows pausing and resuming large file transfers via chunk tracking.
- File Upload - A JavaScript library for handling large file uploads using the HTML5 File API with support for chunking and resuming.
- Client-Side File Segmentation - Implements chunk-based file segmentation using the HTML5 File API to enable partial transmission and recovery.
- Chunk Existence Verification - Checks if specific file segments already exist on the server before uploading them to avoid redundant data transfer.
- Chunked File Transmitters - Functions as a chunked data transmitter that divides large files into smaller pieces for reliable delivery.
- Resumable File Transfers - Recovers upload processes after connection loss or page refresh by resuming from the last successful segment.
- Chunked Resumable Transfers - Splits files into fixed-size chunks and resumes transmission after network interruptions to ensure delivery.
- Server-Side Chunk Verification - Queries the remote server for existing segments to determine the starting offset for interrupted uploads.
- Resumable Upload Clients - Splits files into segments to recover upload progress after network interruptions or browser restarts.
- Queue Management - Provides comprehensive tools to manage the upload queue, including the ability to add, remove, or cancel files.
- Concurrent Upload Pipelines - Sends multiple files or data chunks simultaneously to maximize bandwidth and reduce overall upload time.
- Resilience and Fault Tolerance - Ensures file transfers complete successfully by automatically retrying failed chunks and recovering from interruptions.
- Chunked Transfer Controls - Allows customization of chunk sizes and simultaneous upload limits to control data transmission behavior.
- Upload Progress Tracking - Tracks completion percentages for individual files or total batches using event listeners.
- Request Retry Mechanisms - Automatically re-attempts the transmission of failed chunks to ensure completion despite transient network errors.
- Drag-and-Drop File Upload - Binds browser file inputs and drag-and-drop interfaces to the upload management system.
- Event-Driven Progress Tracking - Uses callback listeners to broadcast real-time upload state and completion percentages for files and batches.
- Concurrent Request Pooling - Manages a limited pool of simultaneous HTTP requests to optimize bandwidth and prevent server congestion.
