Download ((link)) Manager: C2c

# Stream to target (simplified PUT example) async with session.put(job.target_url, data=resp.content) as target_resp: if target_resp.status in (200, 201): jobs[job_id] = "status": "complete", "size": total else: jobs[job_id] = "status": "failed", "error": f"Target error target_resp.status" except Exception as e: jobs[job_id] = "status": "failed", "error": str(e) @app.post("/transfer") async def start_transfer(job: TransferJob, background: BackgroundTasks): job_id = str(uuid.uuid4()) jobs[job_id] = "status": "starting" background.add_task(c2c_transfer, job_id, job) return "job_id": job_id, "status": "accepted"

Would you like a deeper dive into any specific protocol (S3, WebDAV, SFTP) or a complete Dockerized version of this manager?

Unlike a standard download manager (which pulls from a single URL) or BitTorrent (which pulls from many peers), a directly transfers files from one remote content source to another without ever storing the file locally on the initiating device. Core Concept C2C = Server A → Server B (Initiated from Device C) c2c download manager

: Use rclone – it's the most mature C2C system available. For a custom solution, the FastAPI snippet above gives you a starting point to build your own orchestrator.

jobs = {}

res.json( status: 'transferred', size: sourceStream.headers.get('content-length') ); ;

| Tool | Description | |------|-------------| | | rclone copy source:path dest:path – pure remote-to-remote | | gclone | rclone fork with multi-threaded remote-to-remote | | Air Explorer | GUI for cloud-to-cloud transfers | | MultCloud | Web-based C2C (proprietary) | | FileZilla Pro | FXP support (server-to-server FTP) | | s3cmd | s3cmd cp s3://bucket1/file s3://bucket2/file | Example with rclone (most practical): # Configure remotes once rclone config # add S3, Google Drive, SFTP, etc. C2C transfer (no local download) rclone copy drive:myfile.mp4 dropbox:backups/ --progress Multi-threaded C2C rclone copy s3:mybucket/files/ webdav:archive/ --transfers 8 Sync two clouds directly rclone sync onedrive:Documents/ google:Backup/Documents/ Advanced: Serverless C2C (Cloud Functions) For true zero-infrastructure C2C, use cloud functions: # Stream to target (simplified PUT example) async

Your phone/laptop acts only as the controller , not the storage medium . The file moves directly between two remote locations (cloud storage, VPS, NAS, etc.). ┌─────────────┐ Control Signal ┌─────────────────┐ │ Controller │ ─────────────────────→ │ C2C Manager │ │ (Your PC/ │ │ (Core Engine) │ │ Phone) │ ←───────────────────── │ │ └─────────────┘ Status Updates └────────┬────────┘ │ Direct Transfer (no controller) │ ┌───────────────────────┼───────────────────────┐ ↓ ↓ ↓ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ Source A │ ──────→ │ Source B │ │ Source C │ │ (HTTP/FTP/ │ Data │ (Cloud │ │ (NAS/ │ │ S3/BTFS) │ Flow │ Storage) │ │ Server) │ └─────────────┘ └─────────────┘ └─────────────┘ Key Features | Feature | Description | |---------|-------------| | No Local Storage | Files never touch your controller device | | Remote-to-Remote | Transfer directly between two URLs/remotes | | Multi-Protocol | HTTP, HTTPS, FTP, SFTP, S3, WebDAV, IPFS, BitTorrent | | Resume Support | Interrupted transfers resume from last byte | | Bandwidth Shaping | Limit speed per transfer | | Scheduling | Run transfers during off-peak hours | | Web UI / CLI | Control from anywhere | | Notifications | Telegram/Discord/Webhook on completion | Example Use Cases 1. Cloud-to-Cloud Backup Source: s3://my-backup-bucket/file.zip Target: webdavs://nextcloud.example.com/remote.php/dav/files/backups/ Controller: Your phone (only sends command) 2. Seedbox to Personal NAS Source: https://seedbox.example.com/linux.iso Target: sftp://nas.local/volume1/downloads/ Controller: Laptop (can go offline after start) 3. IPFS to HTTP Archive Source: ipfs://QmXoypizjW3WknFiJnKLwHCnL72vedxjQkDDP1mXWo6uco Target: https://archive.org/upload/ Controller: Raspberry Pi (low-power orchestrator) Sample Implementation (Python + FastAPI) # c2c_download_manager.py from fastapi import FastAPI, BackgroundTasks from pydantic import BaseModel import aiohttp import asyncio from typing import Optional app = FastAPI(title="C2C Download Manager")