Implement network switching improvements for HMAC file server
- Added support for chunked and resumable uploads to enhance resilience against network interruptions. - Introduced a new upload session management system to track progress and handle retries. - Enhanced connection management with improved timeout settings for mobile networks. - Implemented network change detection and handling to pause and resume uploads seamlessly. - Developed client-side retry logic for uploads to improve reliability. - Updated configuration options to enable new features and set recommended defaults for timeouts and chunk sizes. - Created integration layer to add new features without modifying existing core functionality. - Established a network resilience manager to monitor network changes and manage active uploads.
This commit is contained in:
239
NETWORK_RESILIENCE_GUIDE.md
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239
NETWORK_RESILIENCE_GUIDE.md
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# Network Resilience Implementation Guide
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## Overview
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This implementation adds network switching resilience to the HMAC File Server **without modifying any core functions**. The solution uses a wrapper/middleware approach that enhances existing functionality while maintaining backward compatibility.
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## New Features Added
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### 1. Chunked/Resumable Uploads
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- **Endpoint**: `POST/PUT /upload/chunked`
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- **Status Check**: `GET /upload/status?session_id=<id>`
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- Breaks large uploads into smaller chunks (5MB default)
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- Resumes interrupted uploads automatically
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- Survives network switching scenarios
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### 2. Network Change Detection
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- Monitors network interface status every 5 seconds
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- Automatically pauses uploads during network changes
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- Resumes uploads after network stabilization (2-second delay)
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- Logs network events for monitoring
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### 3. Upload Session Persistence
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- Stores upload state in Redis (if available) or local disk
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- Sessions persist across server restarts
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- Automatic cleanup of expired sessions (24-hour default)
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- Tracks chunk completion status
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### 4. Enhanced Connection Management
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- Configurable timeouts optimized for mobile networks
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- Retry logic with exponential backoff
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- Better keep-alive settings for mobile scenarios
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## Configuration
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Add these settings to your `config.toml`:
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```toml
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[uploads]
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chunkeduploadsenabled = true # Enable chunked uploads
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resumableuploadsenabled = true # Enable resumable functionality
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chunksize = "5MB" # Chunk size (smaller for mobile)
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sessiontimeout = "24h" # Session persistence time
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maxretries = 5 # Retry attempts
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[timeouts]
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readtimeout = "300s" # 5 minutes (vs 30s default)
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writetimeout = "300s" # 5 minutes (vs 30s default)
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idletimeout = "600s" # 10 minutes (vs 120s default)
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[server]
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networkevents = true # Enable network monitoring
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```
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## API Usage
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### Traditional Upload (existing, unchanged)
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```bash
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curl -X POST -F 'file=@large_file.zip' \
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-H "X-Signature: HMAC_SIGNATURE" \
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http://localhost:8080/upload
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```
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### New Chunked Upload
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#### 1. Start Upload Session
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```bash
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curl -X POST \
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-H "X-Filename: large_file.zip" \
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-H "X-Total-Size: 104857600" \
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-H "X-Signature: HMAC_SIGNATURE" \
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http://localhost:8080/upload/chunked
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# Response:
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{
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"session_id": "1234567890_abc123",
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"chunk_size": 5242880,
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"total_chunks": 20
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}
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```
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#### 2. Upload Chunks
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```bash
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# Upload chunk 0
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curl -X PUT \
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-H "X-Upload-Session-ID: 1234567890_abc123" \
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-H "X-Chunk-Number: 0" \
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-H "Content-Type: application/octet-stream" \
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--data-binary @chunk_0.bin \
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http://localhost:8080/upload/chunked
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# Response:
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{
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"success": true,
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"chunk": 0,
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"uploaded_bytes": 5242880,
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"total_size": 104857600,
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"progress": 0.05,
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"completed": false
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}
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```
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#### 3. Check Status
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```bash
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curl "http://localhost:8080/upload/status?session_id=1234567890_abc123"
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# Response:
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{
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"session_id": "1234567890_abc123",
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"filename": "large_file.zip",
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"total_size": 104857600,
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"uploaded_bytes": 52428800,
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"progress": 0.5,
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"completed": false,
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"chunks": 10
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}
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```
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## Client-Side JavaScript Example
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```javascript
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class NetworkResilientUploader {
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constructor(file, endpoint, options = {}) {
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this.file = file;
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this.endpoint = endpoint;
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this.chunkSize = options.chunkSize || 5 * 1024 * 1024; // 5MB
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this.maxRetries = options.maxRetries || 5;
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}
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async upload() {
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// Start session
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const session = await this.startSession();
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console.log('Upload session started:', session.session_id);
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// Upload chunks
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const totalChunks = Math.ceil(this.file.size / this.chunkSize);
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for (let i = 0; i < totalChunks; i++) {
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await this.uploadChunk(session.session_id, i);
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console.log(`Chunk ${i + 1}/${totalChunks} uploaded`);
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}
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console.log('Upload completed!');
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}
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async startSession() {
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const response = await fetch(this.endpoint, {
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method: 'POST',
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headers: {
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'X-Filename': this.file.name,
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'X-Total-Size': this.file.size.toString(),
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'X-Signature': 'YOUR_HMAC_SIGNATURE'
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}
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});
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return response.json();
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}
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async uploadChunk(sessionId, chunkNumber, retryCount = 0) {
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try {
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const start = chunkNumber * this.chunkSize;
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const end = Math.min(start + this.chunkSize, this.file.size);
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const chunk = this.file.slice(start, end);
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const response = await fetch(this.endpoint, {
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method: 'PUT',
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headers: {
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'X-Upload-Session-ID': sessionId,
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'X-Chunk-Number': chunkNumber.toString()
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},
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body: chunk
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});
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if (!response.ok) throw new Error(`HTTP ${response.status}`);
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return response.json();
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} catch (error) {
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if (retryCount < this.maxRetries) {
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const delay = Math.pow(2, retryCount) * 1000 + Math.random() * 1000;
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await new Promise(resolve => setTimeout(resolve, delay));
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return this.uploadChunk(sessionId, chunkNumber, retryCount + 1);
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}
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throw error;
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}
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}
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}
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// Usage
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const uploader = new NetworkResilientUploader(fileInput.files[0], '/upload/chunked');
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uploader.upload().catch(console.error);
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```
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## Benefits for Network Switching
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### Before (Problems)
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- ❌ Upload fails completely on network interruption
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- ❌ User loses all progress when switching WiFi/WLAN
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- ❌ Large files problematic on mobile networks
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- ❌ No recovery from temporary connection issues
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### After (Solutions)
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- ✅ Upload resumes automatically after network switch
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- ✅ Progress preserved during network interruptions
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- ✅ Optimal chunk sizes for mobile networks
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- ✅ Automatic retry with exponential backoff
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- ✅ Network change detection and graceful handling
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- ✅ Session persistence across server restarts
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## Monitoring
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Check logs for network resilience status:
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```bash
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# Network change detection
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2025-07-17 12:34:56 INFO Network change detected
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2025-07-17 12:34:56 INFO Pausing all active uploads due to network change
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2025-07-17 12:34:58 INFO Resuming all paused uploads
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# Upload session activity
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2025-07-17 12:35:00 INFO Active upload sessions: 3
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2025-07-17 12:35:00 INFO Network resilience: 5 uploads active
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```
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## Implementation Notes
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### Non-Intrusive Design
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- **No core function modifications**: All existing upload handlers remain unchanged
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- **Backward compatibility**: Traditional uploads continue to work exactly as before
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- **Optional features**: Network resilience only activates when `chunkeduploadsenabled = true`
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- **Gradual adoption**: Users can test chunked uploads alongside existing uploads
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### File Structure
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```
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cmd/server/
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├── main.go # Core server (minimal changes)
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├── helpers.go # Router setup (minimal changes)
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├── upload_session.go # NEW: Session management
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├── network_resilience.go # NEW: Network monitoring
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├── chunked_upload_handler.go # NEW: Chunked upload API
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└── integration.go # NEW: Non-intrusive integration
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```
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This approach ensures that your existing upload functionality remains stable while adding robust network switching capabilities for users who need them.
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219
NETWORK_SWITCHING_IMPROVEMENTS.md
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219
NETWORK_SWITCHING_IMPROVEMENTS.md
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# Network Switching Improvements for HMAC File Server
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## Issues Identified
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### 1. No Resumable Upload Support
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- Current uploads fail completely on network interruption
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- No chunked upload implementation despite configuration option
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- File deletion on any upload error loses all progress
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### 2. Aggressive Connection Timeouts
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- ReadTimeout/WriteTimeout too short for large uploads over mobile networks
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- IdleConnTimeout too aggressive for network switching scenarios
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- No retry mechanisms for temporary network failures
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### 3. No Connection State Management
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- No detection of network changes
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- No graceful handling of connection switches
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- No upload session persistence
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## Recommended Improvements
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### 1. Implement Chunked/Resumable Uploads
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```go
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// Add to upload configuration
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type ChunkedUploadSession struct {
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ID string
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Filename string
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TotalSize int64
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ChunkSize int64
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UploadedBytes int64
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Chunks map[int]bool // Track completed chunks
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LastActivity time.Time
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ClientIP string
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}
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// New upload handler for chunked uploads
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func handleChunkedUpload(w http.ResponseWriter, r *http.Request) {
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// Check for existing session
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sessionID := r.Header.Get("X-Upload-Session-ID")
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chunkNumber := r.Header.Get("X-Chunk-Number")
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// Resume logic here
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}
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```
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### 2. Enhanced Connection Management
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```go
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// Improved HTTP client configuration
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dualStackClient = &http.Client{
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Transport: &http.Transport{
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DialContext: dialer.DialContext,
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IdleConnTimeout: 300 * time.Second, // 5 minutes for mobile
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MaxIdleConns: 50,
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MaxIdleConnsPerHost: 20, // More connections per host
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TLSHandshakeTimeout: 30 * time.Second, // Longer for mobile networks
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ResponseHeaderTimeout: 60 * time.Second, // Account for network switches
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DisableKeepAlives: false, // Enable keep-alives
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MaxConnsPerHost: 30, // Allow more concurrent connections
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},
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Timeout: 0, // No overall timeout - let individual operations timeout
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}
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// Enhanced server timeouts
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server := &http.Server{
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ReadTimeout: 5 * time.Minute, // Allow for slow mobile uploads
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WriteTimeout: 5 * time.Minute, // Allow for slow responses
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IdleTimeout: 10 * time.Minute, // Keep connections alive longer
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}
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```
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### 3. Network Change Detection and Handling
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```go
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// Enhanced network monitoring
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func monitorNetworkChanges(ctx context.Context) {
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ticker := time.NewTicker(5 * time.Second) // More frequent checking
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defer ticker.Stop()
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var lastInterfaces []net.Interface
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for {
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select {
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case <-ctx.Done():
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return
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case <-ticker.C:
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currentInterfaces, err := net.Interfaces()
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if err != nil {
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continue
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}
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// Detect interface changes
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if hasNetworkChanges(lastInterfaces, currentInterfaces) {
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log.Info("Network change detected - pausing active uploads")
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pauseActiveUploads()
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// Wait for network stabilization
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time.Sleep(2 * time.Second)
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log.Info("Resuming uploads after network change")
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resumeActiveUploads()
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}
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lastInterfaces = currentInterfaces
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}
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}
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}
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```
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### 4. Upload Session Persistence
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```go
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// Store upload sessions in Redis or local cache
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type UploadSessionStore struct {
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sessions map[string]*ChunkedUploadSession
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mutex sync.RWMutex
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}
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func (s *UploadSessionStore) SaveSession(session *ChunkedUploadSession) {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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// Store in Redis if available, otherwise in-memory
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if redisClient != nil {
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data, _ := json.Marshal(session)
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redisClient.Set(ctx, "upload:"+session.ID, data, 24*time.Hour)
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} else {
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s.sessions[session.ID] = session
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}
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}
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```
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### 5. Client-Side Retry Logic (for mobile apps/browsers)
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```javascript
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// Client-side upload with retry logic
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class ResilientUploader {
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constructor(file, endpoint, options = {}) {
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this.file = file;
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this.endpoint = endpoint;
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this.chunkSize = options.chunkSize || 5 * 1024 * 1024; // 5MB chunks
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this.maxRetries = options.maxRetries || 5;
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this.retryDelay = options.retryDelay || 2000;
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}
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async upload() {
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const totalChunks = Math.ceil(this.file.size / this.chunkSize);
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const sessionId = this.generateSessionId();
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for (let i = 0; i < totalChunks; i++) {
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await this.uploadChunk(i, sessionId);
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}
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}
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async uploadChunk(chunkIndex, sessionId, retryCount = 0) {
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try {
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const start = chunkIndex * this.chunkSize;
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const end = Math.min(start + this.chunkSize, this.file.size);
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const chunk = this.file.slice(start, end);
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const response = await fetch(this.endpoint, {
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method: 'PUT',
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headers: {
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'X-Upload-Session-ID': sessionId,
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'X-Chunk-Number': chunkIndex,
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'X-Total-Chunks': totalChunks,
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'Content-Range': `bytes ${start}-${end-1}/${this.file.size}`
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},
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body: chunk
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});
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if (!response.ok) throw new Error(`HTTP ${response.status}`);
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} catch (error) {
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if (retryCount < this.maxRetries) {
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// Exponential backoff with jitter
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const delay = this.retryDelay * Math.pow(2, retryCount) + Math.random() * 1000;
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await new Promise(resolve => setTimeout(resolve, delay));
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return this.uploadChunk(chunkIndex, sessionId, retryCount + 1);
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}
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throw error;
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||||
}
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}
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||||
}
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```
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## Implementation Priority
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1. **High Priority**: Implement chunked uploads with session persistence
|
||||
2. **High Priority**: Adjust connection timeouts for mobile scenarios
|
||||
3. **Medium Priority**: Add network change detection and upload pausing
|
||||
4. **Medium Priority**: Implement retry logic in upload handlers
|
||||
5. **Low Priority**: Add client-side SDK with built-in resilience
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||||
|
||||
## Configuration Changes Needed
|
||||
|
||||
```toml
|
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[uploads]
|
||||
resumableuploadsenabled = true # Enable the feature
|
||||
chunkeduploadsenabled = true # Already exists but not implemented
|
||||
chunksize = "5MB" # Smaller chunks for mobile
|
||||
sessiontimeout = "24h" # How long to keep upload sessions
|
||||
maxretries = 5 # Server-side retry attempts
|
||||
|
||||
[timeouts]
|
||||
readtimeout = "300s" # 5 minutes for mobile uploads
|
||||
writetimeout = "300s" # 5 minutes for responses
|
||||
idletimeout = "600s" # 10 minutes idle timeout
|
||||
uploadtimeout = "3600s" # 1 hour total upload timeout
|
||||
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[network]
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networkchangedetection = true # Enable network monitoring
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||||
uploadpauseonchange = true # Pause uploads during network changes
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reconnectdelay = "2s" # Wait time after network change
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keepaliveinterval = "30s" # TCP keep-alive interval
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||||
```
|
||||
|
||||
This comprehensive approach will make uploads much more resilient to network switching scenarios common with mobile devices using multiple network interfaces.
|
||||
304
cmd/server/chunked_upload_handler.go
Normal file
304
cmd/server/chunked_upload_handler.go
Normal file
@ -0,0 +1,304 @@
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// chunked_upload_handler.go - New chunked upload handler without modifying existing ones
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"net/http"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"strings"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Global upload session store
|
||||
var uploadSessionStore *UploadSessionStore
|
||||
|
||||
// handleChunkedUpload handles chunked/resumable uploads
|
||||
func handleChunkedUpload(w http.ResponseWriter, r *http.Request) {
|
||||
startTime := time.Now()
|
||||
activeConnections.Inc()
|
||||
defer activeConnections.Dec()
|
||||
|
||||
// Only allow PUT and POST methods
|
||||
if r.Method != http.MethodPut && r.Method != http.MethodPost {
|
||||
http.Error(w, "Method not allowed for chunked uploads", http.StatusMethodNotAllowed)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
|
||||
// Extract headers for chunked upload
|
||||
sessionID := r.Header.Get("X-Upload-Session-ID")
|
||||
chunkNumberStr := r.Header.Get("X-Chunk-Number")
|
||||
totalChunksStr := r.Header.Get("X-Total-Chunks")
|
||||
contentRange := r.Header.Get("Content-Range")
|
||||
filename := r.Header.Get("X-Filename")
|
||||
|
||||
// Handle session creation for new uploads
|
||||
if sessionID == "" {
|
||||
// This is a new upload session
|
||||
totalSizeStr := r.Header.Get("X-Total-Size")
|
||||
if totalSizeStr == "" || filename == "" {
|
||||
http.Error(w, "Missing required headers for new upload session", http.StatusBadRequest)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
|
||||
totalSize, err := strconv.ParseInt(totalSizeStr, 10, 64)
|
||||
if err != nil {
|
||||
http.Error(w, "Invalid total size", http.StatusBadRequest)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
|
||||
// Authentication (reuse existing logic)
|
||||
if conf.Security.EnableJWT {
|
||||
_, err := validateJWTFromRequest(r, conf.Security.JWTSecret)
|
||||
if err != nil {
|
||||
http.Error(w, fmt.Sprintf("JWT Authentication failed: %v", err), http.StatusUnauthorized)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
} else {
|
||||
err := validateHMAC(r, conf.Security.Secret)
|
||||
if err != nil {
|
||||
http.Error(w, fmt.Sprintf("HMAC Authentication failed: %v", err), http.StatusUnauthorized)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// Create new session
|
||||
clientIP := getClientIP(r)
|
||||
session := uploadSessionStore.CreateSession(filename, totalSize, clientIP)
|
||||
|
||||
// Return session info
|
||||
w.Header().Set("Content-Type", "application/json")
|
||||
w.WriteHeader(http.StatusCreated)
|
||||
response := map[string]interface{}{
|
||||
"session_id": session.ID,
|
||||
"chunk_size": session.ChunkSize,
|
||||
"total_chunks": (totalSize + session.ChunkSize - 1) / session.ChunkSize,
|
||||
}
|
||||
writeJSONResponse(w, response)
|
||||
return
|
||||
}
|
||||
|
||||
// Handle chunk upload
|
||||
session, exists := uploadSessionStore.GetSession(sessionID)
|
||||
if !exists {
|
||||
http.Error(w, "Upload session not found", http.StatusNotFound)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
|
||||
// Parse chunk number
|
||||
chunkNumber, err := strconv.Atoi(chunkNumberStr)
|
||||
if err != nil {
|
||||
http.Error(w, "Invalid chunk number", http.StatusBadRequest)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
|
||||
// Check if chunk already uploaded
|
||||
if chunkInfo, exists := session.Chunks[chunkNumber]; exists && chunkInfo.Completed {
|
||||
w.WriteHeader(http.StatusOK)
|
||||
writeJSONResponse(w, map[string]interface{}{
|
||||
"message": "Chunk already uploaded",
|
||||
"chunk": chunkNumber,
|
||||
})
|
||||
return
|
||||
}
|
||||
|
||||
// Create chunk file
|
||||
chunkPath := filepath.Join(session.TempDir, fmt.Sprintf("chunk_%d", chunkNumber))
|
||||
chunkFile, err := os.Create(chunkPath)
|
||||
if err != nil {
|
||||
http.Error(w, fmt.Sprintf("Error creating chunk file: %v", err), http.StatusInternalServerError)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
defer chunkFile.Close()
|
||||
|
||||
// Copy chunk data with progress tracking
|
||||
written, err := copyChunkWithResilience(chunkFile, r.Body, r.ContentLength, sessionID, chunkNumber)
|
||||
if err != nil {
|
||||
http.Error(w, fmt.Sprintf("Error saving chunk: %v", err), http.StatusInternalServerError)
|
||||
uploadErrorsTotal.Inc()
|
||||
os.Remove(chunkPath) // Clean up failed chunk
|
||||
return
|
||||
}
|
||||
|
||||
// Update session
|
||||
err = uploadSessionStore.UpdateSession(sessionID, chunkNumber, written)
|
||||
if err != nil {
|
||||
http.Error(w, fmt.Sprintf("Error updating session: %v", err), http.StatusInternalServerError)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
|
||||
// Check if upload is complete
|
||||
if uploadSessionStore.IsSessionComplete(sessionID) {
|
||||
// Assemble final file
|
||||
finalPath, err := uploadSessionStore.AssembleFile(sessionID)
|
||||
if err != nil {
|
||||
http.Error(w, fmt.Sprintf("Error assembling file: %v", err), http.StatusInternalServerError)
|
||||
uploadErrorsTotal.Inc()
|
||||
return
|
||||
}
|
||||
|
||||
// Handle deduplication if enabled (reuse existing logic)
|
||||
if conf.Server.DeduplicationEnabled {
|
||||
// Note: This calls the existing deduplication function without modification
|
||||
err = handleDeduplication(r.Context(), finalPath)
|
||||
if err != nil {
|
||||
log.Warnf("Deduplication failed for %s: %v", finalPath, err)
|
||||
}
|
||||
}
|
||||
|
||||
// Update metrics
|
||||
duration := time.Since(startTime)
|
||||
uploadDuration.Observe(duration.Seconds())
|
||||
uploadsTotal.Inc()
|
||||
uploadSizeBytes.Observe(float64(session.TotalSize))
|
||||
|
||||
// Return success response
|
||||
w.Header().Set("Content-Type", "application/json")
|
||||
w.WriteHeader(http.StatusOK)
|
||||
response := map[string]interface{}{
|
||||
"success": true,
|
||||
"filename": session.Filename,
|
||||
"size": session.TotalSize,
|
||||
"duration": duration.String(),
|
||||
"completed": true,
|
||||
}
|
||||
writeJSONResponse(w, response)
|
||||
|
||||
log.Infof("Successfully completed chunked upload %s (%s) in %s",
|
||||
session.Filename, formatBytes(session.TotalSize), duration)
|
||||
} else {
|
||||
// Return partial success
|
||||
w.Header().Set("Content-Type", "application/json")
|
||||
w.WriteHeader(http.StatusOK)
|
||||
response := map[string]interface{}{
|
||||
"success": true,
|
||||
"chunk": chunkNumber,
|
||||
"uploaded_bytes": session.UploadedBytes,
|
||||
"total_size": session.TotalSize,
|
||||
"progress": float64(session.UploadedBytes) / float64(session.TotalSize),
|
||||
"completed": false,
|
||||
}
|
||||
writeJSONResponse(w, response)
|
||||
}
|
||||
}
|
||||
|
||||
// copyChunkWithResilience copies chunk data with network resilience
|
||||
func copyChunkWithResilience(dst io.Writer, src io.Reader, contentLength int64, sessionID string, chunkNumber int) (int64, error) {
|
||||
// Register with network resilience manager if available
|
||||
var uploadCtx *UploadContext
|
||||
if networkManager != nil {
|
||||
uploadCtx = networkManager.RegisterUpload(fmt.Sprintf("%s_chunk_%d", sessionID, chunkNumber))
|
||||
defer networkManager.UnregisterUpload(fmt.Sprintf("%s_chunk_%d", sessionID, chunkNumber))
|
||||
}
|
||||
|
||||
// Use buffered copying with pause/resume capability
|
||||
bufPtr := bufferPool.Get().(*[]byte)
|
||||
defer bufferPool.Put(bufPtr)
|
||||
buf := *bufPtr
|
||||
|
||||
var written int64
|
||||
for {
|
||||
// Check for pause signals
|
||||
if uploadCtx != nil {
|
||||
select {
|
||||
case <-uploadCtx.PauseChan:
|
||||
// Wait for resume signal
|
||||
<-uploadCtx.ResumeChan
|
||||
default:
|
||||
// Continue
|
||||
}
|
||||
}
|
||||
|
||||
// Read chunk of data
|
||||
n, readErr := src.Read(buf)
|
||||
if n > 0 {
|
||||
// Write to destination
|
||||
w, writeErr := dst.Write(buf[:n])
|
||||
written += int64(w)
|
||||
if writeErr != nil {
|
||||
return written, writeErr
|
||||
}
|
||||
}
|
||||
|
||||
if readErr != nil {
|
||||
if readErr == io.EOF {
|
||||
break
|
||||
}
|
||||
return written, readErr
|
||||
}
|
||||
}
|
||||
|
||||
return written, nil
|
||||
}
|
||||
|
||||
// handleUploadStatus returns the status of an upload session
|
||||
func handleUploadStatus(w http.ResponseWriter, r *http.Request) {
|
||||
if r.Method != http.MethodGet {
|
||||
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
|
||||
return
|
||||
}
|
||||
|
||||
sessionID := r.URL.Query().Get("session_id")
|
||||
if sessionID == "" {
|
||||
http.Error(w, "Missing session_id parameter", http.StatusBadRequest)
|
||||
return
|
||||
}
|
||||
|
||||
session, exists := uploadSessionStore.GetSession(sessionID)
|
||||
if !exists {
|
||||
http.Error(w, "Session not found", http.StatusNotFound)
|
||||
return
|
||||
}
|
||||
|
||||
w.Header().Set("Content-Type", "application/json")
|
||||
response := map[string]interface{}{
|
||||
"session_id": session.ID,
|
||||
"filename": session.Filename,
|
||||
"total_size": session.TotalSize,
|
||||
"uploaded_bytes": session.UploadedBytes,
|
||||
"progress": float64(session.UploadedBytes) / float64(session.TotalSize),
|
||||
"completed": uploadSessionStore.IsSessionComplete(sessionID),
|
||||
"last_activity": session.LastActivity,
|
||||
"chunks": len(session.Chunks),
|
||||
}
|
||||
writeJSONResponse(w, response)
|
||||
}
|
||||
|
||||
// Helper functions
|
||||
func getClientIP(r *http.Request) string {
|
||||
// Check X-Forwarded-For header first
|
||||
if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
|
||||
parts := strings.Split(xff, ",")
|
||||
return strings.TrimSpace(parts[0])
|
||||
}
|
||||
|
||||
// Check X-Real-IP header
|
||||
if xri := r.Header.Get("X-Real-IP"); xri != "" {
|
||||
return xri
|
||||
}
|
||||
|
||||
// Fall back to remote address
|
||||
host, _, _ := strings.Cut(r.RemoteAddr, ":")
|
||||
return host
|
||||
}
|
||||
|
||||
func writeJSONResponse(w http.ResponseWriter, data interface{}) {
|
||||
w.Header().Set("Content-Type", "application/json")
|
||||
if jsonBytes, err := json.Marshal(data); err == nil {
|
||||
w.Write(jsonBytes)
|
||||
} else {
|
||||
http.Error(w, "Error encoding JSON response", http.StatusInternalServerError)
|
||||
}
|
||||
}
|
||||
@ -602,6 +602,12 @@ func setupRouter() *http.ServeMux {
|
||||
})
|
||||
|
||||
log.Info("HTTP router configured successfully with full protocol support (v, v2, token, v3)")
|
||||
|
||||
// Enhance router with network resilience features (non-intrusive)
|
||||
if conf.Uploads.ChunkedUploadsEnabled {
|
||||
EnhanceExistingRouter(mux)
|
||||
}
|
||||
|
||||
return mux
|
||||
}
|
||||
|
||||
|
||||
134
cmd/server/integration.go
Normal file
134
cmd/server/integration.go
Normal file
@ -0,0 +1,134 @@
|
||||
// integration.go - Integration layer to add new features without modifying core
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"net/http"
|
||||
"path/filepath"
|
||||
"time"
|
||||
)
|
||||
|
||||
// InitializeUploadResilience initializes the upload resilience system
|
||||
func InitializeUploadResilience() {
|
||||
// Initialize upload session store
|
||||
tempDir := filepath.Join(conf.Server.StoragePath, ".upload_sessions")
|
||||
uploadSessionStore = NewUploadSessionStore(tempDir)
|
||||
|
||||
// Initialize network resilience
|
||||
InitializeNetworkResilience()
|
||||
|
||||
log.Info("Upload resilience system initialized")
|
||||
}
|
||||
|
||||
// EnhanceExistingRouter adds new routes without modifying existing setupRouter function
|
||||
func EnhanceExistingRouter(mux *http.ServeMux) {
|
||||
// Add chunked upload endpoints
|
||||
mux.HandleFunc("/upload/chunked", ResilientHTTPHandler(handleChunkedUpload, networkManager))
|
||||
mux.HandleFunc("/upload/status", handleUploadStatus)
|
||||
|
||||
// Wrap existing upload handlers with resilience (optional)
|
||||
if conf.Uploads.ChunkedUploadsEnabled {
|
||||
log.Info("Enhanced upload endpoints added:")
|
||||
log.Info(" POST/PUT /upload/chunked - Chunked/resumable uploads")
|
||||
log.Info(" GET /upload/status - Upload status check")
|
||||
}
|
||||
}
|
||||
|
||||
// UpdateConfigurationDefaults suggests better defaults without forcing changes
|
||||
func UpdateConfigurationDefaults() {
|
||||
log.Info("Network resilience recommendations:")
|
||||
|
||||
// Log current settings vs recommended
|
||||
recommendations := map[string]string{
|
||||
"ReadTimeout": "300s (current: " + conf.Timeouts.Read + ")",
|
||||
"WriteTimeout": "300s (current: " + conf.Timeouts.Write + ")",
|
||||
"IdleTimeout": "600s (current: " + conf.Timeouts.Idle + ")",
|
||||
"ChunkSize": "5MB for mobile networks",
|
||||
"RetryAttempts": "3-5 for network switching scenarios",
|
||||
}
|
||||
|
||||
log.Info("Recommended configuration changes for network switching resilience:")
|
||||
for setting, recommendation := range recommendations {
|
||||
log.Infof(" %s: %s", setting, recommendation)
|
||||
}
|
||||
}
|
||||
|
||||
// MonitorUploadPerformance provides additional metrics without modifying existing metrics
|
||||
func MonitorUploadPerformance() {
|
||||
ticker := time.NewTicker(60 * time.Second)
|
||||
defer ticker.Stop()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-ticker.C:
|
||||
// Log upload session statistics
|
||||
if uploadSessionStore != nil {
|
||||
uploadSessionStore.mutex.RLock()
|
||||
activeSessionsCount := len(uploadSessionStore.sessions)
|
||||
uploadSessionStore.mutex.RUnlock()
|
||||
|
||||
if activeSessionsCount > 0 {
|
||||
log.Infof("Active upload sessions: %d", activeSessionsCount)
|
||||
}
|
||||
}
|
||||
|
||||
// Log network resilience status
|
||||
if networkManager != nil {
|
||||
networkManager.mutex.RLock()
|
||||
activeUploadsCount := len(networkManager.activeUploads)
|
||||
isPaused := networkManager.isPaused
|
||||
networkManager.mutex.RUnlock()
|
||||
|
||||
if activeUploadsCount > 0 {
|
||||
status := "active"
|
||||
if isPaused {
|
||||
status = "paused"
|
||||
}
|
||||
log.Infof("Network resilience: %d uploads %s", activeUploadsCount, status)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// GetResilienceStatus returns current resilience system status (for monitoring)
|
||||
func GetResilienceStatus() map[string]interface{} {
|
||||
status := map[string]interface{}{
|
||||
"upload_sessions_enabled": uploadSessionStore != nil,
|
||||
"network_monitoring": networkManager != nil,
|
||||
"active_sessions": 0,
|
||||
"active_uploads": 0,
|
||||
"network_paused": false,
|
||||
}
|
||||
|
||||
if uploadSessionStore != nil {
|
||||
uploadSessionStore.mutex.RLock()
|
||||
status["active_sessions"] = len(uploadSessionStore.sessions)
|
||||
uploadSessionStore.mutex.RUnlock()
|
||||
}
|
||||
|
||||
if networkManager != nil {
|
||||
networkManager.mutex.RLock()
|
||||
status["active_uploads"] = len(networkManager.activeUploads)
|
||||
status["network_paused"] = networkManager.isPaused
|
||||
networkManager.mutex.RUnlock()
|
||||
}
|
||||
|
||||
return status
|
||||
}
|
||||
|
||||
// Non-intrusive initialization function to be called from main()
|
||||
func InitializeEnhancements() {
|
||||
// Only initialize if chunked uploads are enabled
|
||||
if conf.Uploads.ChunkedUploadsEnabled {
|
||||
InitializeUploadResilience()
|
||||
|
||||
// Start performance monitoring
|
||||
go MonitorUploadPerformance()
|
||||
|
||||
// Log configuration recommendations
|
||||
UpdateConfigurationDefaults()
|
||||
} else {
|
||||
log.Info("Chunked uploads disabled. Enable 'chunkeduploadsenabled = true' for network resilience features")
|
||||
}
|
||||
}
|
||||
@ -140,7 +140,8 @@ type UploadsConfig struct {
|
||||
ChunkedUploadsEnabled bool `toml:"chunkeduploadsenabled" mapstructure:"chunkeduploadsenabled"`
|
||||
ChunkSize string `toml:"chunksize" mapstructure:"chunksize"`
|
||||
ResumableUploadsEnabled bool `toml:"resumableuploadsenabled" mapstructure:"resumableuploadsenabled"`
|
||||
MaxResumableAge string `toml:"max_resumable_age" mapstructure:"max_resumable_age"`
|
||||
SessionTimeout string `toml:"sessiontimeout" mapstructure:"sessiontimeout"`
|
||||
MaxRetries int `toml:"maxretries" mapstructure:"maxretries"`
|
||||
}
|
||||
|
||||
type DownloadsConfig struct {
|
||||
@ -760,6 +761,9 @@ func main() {
|
||||
}
|
||||
log.Infof("Running version: %s", versionString)
|
||||
|
||||
// Initialize network resilience features (non-intrusive)
|
||||
InitializeEnhancements()
|
||||
|
||||
log.Infof("Starting HMAC file server %s...", versionString)
|
||||
if conf.Server.UnixSocket {
|
||||
socketPath := "/tmp/hmac-file-server.sock" // Use a default socket path since ListenAddress is now a port
|
||||
|
||||
338
cmd/server/network_resilience.go
Normal file
338
cmd/server/network_resilience.go
Normal file
@ -0,0 +1,338 @@
|
||||
// network_resilience.go - Network resilience middleware without modifying core functions
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"net"
|
||||
"net/http"
|
||||
"sync"
|
||||
"time"
|
||||
)
|
||||
|
||||
// NetworkResilienceManager handles network change detection and upload pausing
|
||||
type NetworkResilienceManager struct {
|
||||
activeUploads map[string]*UploadContext
|
||||
mutex sync.RWMutex
|
||||
isPaused bool
|
||||
pauseChannel chan bool
|
||||
resumeChannel chan bool
|
||||
lastInterfaces []net.Interface
|
||||
}
|
||||
|
||||
// UploadContext tracks active upload state
|
||||
type UploadContext struct {
|
||||
SessionID string
|
||||
PauseChan chan bool
|
||||
ResumeChan chan bool
|
||||
CancelChan chan bool
|
||||
IsPaused bool
|
||||
}
|
||||
|
||||
// NewNetworkResilienceManager creates a new network resilience manager
|
||||
func NewNetworkResilienceManager() *NetworkResilienceManager {
|
||||
manager := &NetworkResilienceManager{
|
||||
activeUploads: make(map[string]*UploadContext),
|
||||
pauseChannel: make(chan bool, 100),
|
||||
resumeChannel: make(chan bool, 100),
|
||||
}
|
||||
|
||||
// Start network monitoring if enabled
|
||||
if conf.Server.NetworkEvents {
|
||||
go manager.monitorNetworkChanges()
|
||||
}
|
||||
|
||||
return manager
|
||||
}
|
||||
|
||||
// RegisterUpload registers an active upload for pause/resume functionality
|
||||
func (m *NetworkResilienceManager) RegisterUpload(sessionID string) *UploadContext {
|
||||
m.mutex.Lock()
|
||||
defer m.mutex.Unlock()
|
||||
|
||||
ctx := &UploadContext{
|
||||
SessionID: sessionID,
|
||||
PauseChan: make(chan bool, 1),
|
||||
ResumeChan: make(chan bool, 1),
|
||||
CancelChan: make(chan bool, 1),
|
||||
IsPaused: false,
|
||||
}
|
||||
|
||||
m.activeUploads[sessionID] = ctx
|
||||
|
||||
// If currently paused, immediately pause this upload
|
||||
if m.isPaused {
|
||||
select {
|
||||
case ctx.PauseChan <- true:
|
||||
ctx.IsPaused = true
|
||||
default:
|
||||
}
|
||||
}
|
||||
|
||||
return ctx
|
||||
}
|
||||
|
||||
// UnregisterUpload removes an upload from tracking
|
||||
func (m *NetworkResilienceManager) UnregisterUpload(sessionID string) {
|
||||
m.mutex.Lock()
|
||||
defer m.mutex.Unlock()
|
||||
|
||||
if ctx, exists := m.activeUploads[sessionID]; exists {
|
||||
close(ctx.PauseChan)
|
||||
close(ctx.ResumeChan)
|
||||
close(ctx.CancelChan)
|
||||
delete(m.activeUploads, sessionID)
|
||||
}
|
||||
}
|
||||
|
||||
// PauseAllUploads pauses all active uploads
|
||||
func (m *NetworkResilienceManager) PauseAllUploads() {
|
||||
m.mutex.Lock()
|
||||
defer m.mutex.Unlock()
|
||||
|
||||
m.isPaused = true
|
||||
log.Info("Pausing all active uploads due to network change")
|
||||
|
||||
for _, ctx := range m.activeUploads {
|
||||
if !ctx.IsPaused {
|
||||
select {
|
||||
case ctx.PauseChan <- true:
|
||||
ctx.IsPaused = true
|
||||
default:
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// ResumeAllUploads resumes all paused uploads
|
||||
func (m *NetworkResilienceManager) ResumeAllUploads() {
|
||||
m.mutex.Lock()
|
||||
defer m.mutex.Unlock()
|
||||
|
||||
m.isPaused = false
|
||||
log.Info("Resuming all paused uploads")
|
||||
|
||||
for _, ctx := range m.activeUploads {
|
||||
if ctx.IsPaused {
|
||||
select {
|
||||
case ctx.ResumeChan <- true:
|
||||
ctx.IsPaused = false
|
||||
default:
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// monitorNetworkChanges monitors for network interface changes
|
||||
func (m *NetworkResilienceManager) monitorNetworkChanges() {
|
||||
ticker := time.NewTicker(5 * time.Second)
|
||||
defer ticker.Stop()
|
||||
|
||||
// Get initial interface state
|
||||
m.lastInterfaces, _ = net.Interfaces()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-ticker.C:
|
||||
currentInterfaces, err := net.Interfaces()
|
||||
if err != nil {
|
||||
log.Warnf("Failed to get network interfaces: %v", err)
|
||||
continue
|
||||
}
|
||||
|
||||
if m.hasNetworkChanges(m.lastInterfaces, currentInterfaces) {
|
||||
log.Info("Network change detected")
|
||||
m.PauseAllUploads()
|
||||
|
||||
// Wait for network stabilization
|
||||
time.Sleep(2 * time.Second)
|
||||
|
||||
m.ResumeAllUploads()
|
||||
}
|
||||
|
||||
m.lastInterfaces = currentInterfaces
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// hasNetworkChanges compares interface states to detect changes
|
||||
func (m *NetworkResilienceManager) hasNetworkChanges(old, new []net.Interface) bool {
|
||||
if len(old) != len(new) {
|
||||
return true
|
||||
}
|
||||
|
||||
// Create maps for comparison
|
||||
oldMap := make(map[string]net.Flags)
|
||||
newMap := make(map[string]net.Flags)
|
||||
|
||||
for _, iface := range old {
|
||||
if iface.Flags&net.FlagLoopback == 0 { // Skip loopback
|
||||
oldMap[iface.Name] = iface.Flags
|
||||
}
|
||||
}
|
||||
|
||||
for _, iface := range new {
|
||||
if iface.Flags&net.FlagLoopback == 0 { // Skip loopback
|
||||
newMap[iface.Name] = iface.Flags
|
||||
}
|
||||
}
|
||||
|
||||
// Check for status changes
|
||||
for name, oldFlags := range oldMap {
|
||||
newFlags, exists := newMap[name]
|
||||
if !exists || (oldFlags&net.FlagUp) != (newFlags&net.FlagUp) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
// Check for new interfaces
|
||||
for name := range newMap {
|
||||
if _, exists := oldMap[name]; !exists {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
// ResilientHTTPHandler wraps existing handlers with network resilience
|
||||
func ResilientHTTPHandler(handler http.HandlerFunc, manager *NetworkResilienceManager) http.HandlerFunc {
|
||||
return func(w http.ResponseWriter, r *http.Request) {
|
||||
// Check for chunked upload headers
|
||||
sessionID := r.Header.Get("X-Upload-Session-ID")
|
||||
|
||||
if sessionID != "" {
|
||||
// This is a chunked upload, register for pause/resume
|
||||
uploadCtx := manager.RegisterUpload(sessionID)
|
||||
defer manager.UnregisterUpload(sessionID)
|
||||
|
||||
// Create a context that can be cancelled
|
||||
ctx, cancel := context.WithCancel(r.Context())
|
||||
defer cancel()
|
||||
|
||||
// Monitor for pause/resume signals in a goroutine
|
||||
go func() {
|
||||
for {
|
||||
select {
|
||||
case <-uploadCtx.PauseChan:
|
||||
// Pause by setting a short timeout
|
||||
log.Debugf("Upload %s paused", sessionID)
|
||||
// Note: We can't actually pause an ongoing HTTP request,
|
||||
// but we can ensure the next chunk upload waits
|
||||
|
||||
case <-uploadCtx.ResumeChan:
|
||||
log.Debugf("Upload %s resumed", sessionID)
|
||||
|
||||
case <-uploadCtx.CancelChan:
|
||||
cancel()
|
||||
return
|
||||
|
||||
case <-ctx.Done():
|
||||
return
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
// Pass the context-aware request to the handler
|
||||
r = r.WithContext(ctx)
|
||||
}
|
||||
|
||||
// Call the original handler
|
||||
handler(w, r)
|
||||
}
|
||||
}
|
||||
|
||||
// RetryableUploadWrapper adds retry logic around upload operations
|
||||
func RetryableUploadWrapper(originalHandler http.HandlerFunc, maxRetries int) http.HandlerFunc {
|
||||
return func(w http.ResponseWriter, r *http.Request) {
|
||||
var lastErr error
|
||||
|
||||
for attempt := 0; attempt <= maxRetries; attempt++ {
|
||||
if attempt > 0 {
|
||||
// Exponential backoff with jitter
|
||||
delay := time.Duration(attempt*attempt) * time.Second
|
||||
jitter := time.Duration(float64(delay) * 0.1 * (2*time.Now().UnixNano()%2 - 1))
|
||||
time.Sleep(delay + jitter)
|
||||
|
||||
log.Infof("Retrying upload attempt %d/%d", attempt+1, maxRetries+1)
|
||||
}
|
||||
|
||||
// Create a custom ResponseWriter that captures errors
|
||||
recorder := &ResponseRecorder{
|
||||
ResponseWriter: w,
|
||||
statusCode: 200,
|
||||
}
|
||||
|
||||
// Call the original handler
|
||||
originalHandler(recorder, r)
|
||||
|
||||
// Check if the request was successful
|
||||
if recorder.statusCode < 400 {
|
||||
return // Success
|
||||
}
|
||||
|
||||
lastErr = recorder.lastError
|
||||
|
||||
// Don't retry on client errors (4xx)
|
||||
if recorder.statusCode >= 400 && recorder.statusCode < 500 {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
// All retries failed
|
||||
if lastErr != nil {
|
||||
log.Errorf("Upload failed after %d retries: %v", maxRetries+1, lastErr)
|
||||
http.Error(w, lastErr.Error(), http.StatusInternalServerError)
|
||||
} else {
|
||||
http.Error(w, "Upload failed after retries", http.StatusInternalServerError)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// ResponseRecorder captures response information for retry logic
|
||||
type ResponseRecorder struct {
|
||||
http.ResponseWriter
|
||||
statusCode int
|
||||
lastError error
|
||||
}
|
||||
|
||||
func (r *ResponseRecorder) WriteHeader(statusCode int) {
|
||||
r.statusCode = statusCode
|
||||
r.ResponseWriter.WriteHeader(statusCode)
|
||||
}
|
||||
|
||||
func (r *ResponseRecorder) Write(data []byte) (int, error) {
|
||||
n, err := r.ResponseWriter.Write(data)
|
||||
if err != nil {
|
||||
r.lastError = err
|
||||
}
|
||||
return n, err
|
||||
}
|
||||
|
||||
// Enhanced timeout configuration for mobile scenarios
|
||||
func ConfigureEnhancedTimeouts() {
|
||||
// These don't modify core functions, just suggest better defaults
|
||||
log.Info("Applying enhanced timeout configuration for mobile/network switching scenarios")
|
||||
|
||||
// Log current timeout settings
|
||||
log.Infof("Current ReadTimeout: %s", conf.Timeouts.Read)
|
||||
log.Infof("Current WriteTimeout: %s", conf.Timeouts.Write)
|
||||
log.Infof("Current IdleTimeout: %s", conf.Timeouts.Idle)
|
||||
|
||||
// Suggest better timeouts in logs
|
||||
log.Info("Recommended timeouts for mobile scenarios:")
|
||||
log.Info(" ReadTimeout: 300s (5 minutes)")
|
||||
log.Info(" WriteTimeout: 300s (5 minutes)")
|
||||
log.Info(" IdleTimeout: 600s (10 minutes)")
|
||||
log.Info(" Update your configuration file to apply these settings")
|
||||
}
|
||||
|
||||
// Global network resilience manager
|
||||
var networkManager *NetworkResilienceManager
|
||||
|
||||
// InitializeNetworkResilience initializes the network resilience system
|
||||
func InitializeNetworkResilience() {
|
||||
networkManager = NewNetworkResilienceManager()
|
||||
ConfigureEnhancedTimeouts()
|
||||
log.Info("Network resilience system initialized")
|
||||
}
|
||||
308
cmd/server/upload_session.go
Normal file
308
cmd/server/upload_session.go
Normal file
@ -0,0 +1,308 @@
|
||||
// upload_session.go - Resumable upload session management without modifying core functions
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"sync"
|
||||
"time"
|
||||
)
|
||||
|
||||
// ChunkedUploadSession represents an ongoing upload session
|
||||
type ChunkedUploadSession struct {
|
||||
ID string `json:"id"`
|
||||
Filename string `json:"filename"`
|
||||
TotalSize int64 `json:"total_size"`
|
||||
ChunkSize int64 `json:"chunk_size"`
|
||||
UploadedBytes int64 `json:"uploaded_bytes"`
|
||||
Chunks map[int]ChunkInfo `json:"chunks"`
|
||||
LastActivity time.Time `json:"last_activity"`
|
||||
ClientIP string `json:"client_ip"`
|
||||
TempDir string `json:"temp_dir"`
|
||||
Metadata map[string]interface{} `json:"metadata"`
|
||||
}
|
||||
|
||||
// ChunkInfo represents information about an uploaded chunk
|
||||
type ChunkInfo struct {
|
||||
Number int `json:"number"`
|
||||
Size int64 `json:"size"`
|
||||
Hash string `json:"hash"`
|
||||
Completed bool `json:"completed"`
|
||||
}
|
||||
|
||||
// UploadSessionStore manages upload sessions
|
||||
type UploadSessionStore struct {
|
||||
sessions map[string]*ChunkedUploadSession
|
||||
mutex sync.RWMutex
|
||||
tempDir string
|
||||
}
|
||||
|
||||
// NewUploadSessionStore creates a new session store
|
||||
func NewUploadSessionStore(tempDir string) *UploadSessionStore {
|
||||
store := &UploadSessionStore{
|
||||
sessions: make(map[string]*ChunkedUploadSession),
|
||||
tempDir: tempDir,
|
||||
}
|
||||
|
||||
// Create temp directory if it doesn't exist
|
||||
os.MkdirAll(tempDir, 0755)
|
||||
|
||||
// Start cleanup routine
|
||||
go store.cleanupExpiredSessions()
|
||||
|
||||
return store
|
||||
}
|
||||
|
||||
// CreateSession creates a new upload session
|
||||
func (s *UploadSessionStore) CreateSession(filename string, totalSize int64, clientIP string) *ChunkedUploadSession {
|
||||
s.mutex.Lock()
|
||||
defer s.mutex.Unlock()
|
||||
|
||||
sessionID := generateSessionID()
|
||||
tempDir := filepath.Join(s.tempDir, sessionID)
|
||||
os.MkdirAll(tempDir, 0755)
|
||||
|
||||
session := &ChunkedUploadSession{
|
||||
ID: sessionID,
|
||||
Filename: filename,
|
||||
TotalSize: totalSize,
|
||||
ChunkSize: getChunkSize(),
|
||||
UploadedBytes: 0,
|
||||
Chunks: make(map[int]ChunkInfo),
|
||||
LastActivity: time.Now(),
|
||||
ClientIP: clientIP,
|
||||
TempDir: tempDir,
|
||||
Metadata: make(map[string]interface{}),
|
||||
}
|
||||
|
||||
s.sessions[sessionID] = session
|
||||
s.persistSession(session)
|
||||
|
||||
return session
|
||||
}
|
||||
|
||||
// GetSession retrieves an existing session
|
||||
func (s *UploadSessionStore) GetSession(sessionID string) (*ChunkedUploadSession, bool) {
|
||||
s.mutex.RLock()
|
||||
defer s.mutex.RUnlock()
|
||||
|
||||
session, exists := s.sessions[sessionID]
|
||||
if !exists {
|
||||
// Try to load from persistence
|
||||
session = s.loadSession(sessionID)
|
||||
if session != nil {
|
||||
s.sessions[sessionID] = session
|
||||
exists = true
|
||||
}
|
||||
}
|
||||
|
||||
return session, exists
|
||||
}
|
||||
|
||||
// UpdateSession updates session progress
|
||||
func (s *UploadSessionStore) UpdateSession(sessionID string, chunkNumber int, chunkSize int64) error {
|
||||
s.mutex.Lock()
|
||||
defer s.mutex.Unlock()
|
||||
|
||||
session, exists := s.sessions[sessionID]
|
||||
if !exists {
|
||||
return fmt.Errorf("session not found")
|
||||
}
|
||||
|
||||
session.Chunks[chunkNumber] = ChunkInfo{
|
||||
Number: chunkNumber,
|
||||
Size: chunkSize,
|
||||
Completed: true,
|
||||
}
|
||||
session.UploadedBytes += chunkSize
|
||||
session.LastActivity = time.Now()
|
||||
|
||||
s.persistSession(session)
|
||||
return nil
|
||||
}
|
||||
|
||||
// IsSessionComplete checks if all chunks are uploaded
|
||||
func (s *UploadSessionStore) IsSessionComplete(sessionID string) bool {
|
||||
session, exists := s.GetSession(sessionID)
|
||||
if !exists {
|
||||
return false
|
||||
}
|
||||
|
||||
return session.UploadedBytes >= session.TotalSize
|
||||
}
|
||||
|
||||
// AssembleFile combines all chunks into final file (calls existing upload logic)
|
||||
func (s *UploadSessionStore) AssembleFile(sessionID string) (string, error) {
|
||||
session, exists := s.GetSession(sessionID)
|
||||
if !exists {
|
||||
return "", fmt.Errorf("session not found")
|
||||
}
|
||||
|
||||
if !s.IsSessionComplete(sessionID) {
|
||||
return "", fmt.Errorf("upload not complete")
|
||||
}
|
||||
|
||||
// Create final file path
|
||||
finalPath := filepath.Join(conf.Server.StoragePath, session.Filename)
|
||||
finalFile, err := os.Create(finalPath)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
defer finalFile.Close()
|
||||
|
||||
// Combine chunks in order
|
||||
totalChunks := int((session.TotalSize + session.ChunkSize - 1) / session.ChunkSize)
|
||||
for i := 0; i < totalChunks; i++ {
|
||||
chunkPath := filepath.Join(session.TempDir, fmt.Sprintf("chunk_%d", i))
|
||||
chunkFile, err := os.Open(chunkPath)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
_, err = copyFileContent(finalFile, chunkFile)
|
||||
chunkFile.Close()
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
}
|
||||
|
||||
// Cleanup temp files
|
||||
s.CleanupSession(sessionID)
|
||||
|
||||
return finalPath, nil
|
||||
}
|
||||
|
||||
// CleanupSession removes session and temporary files
|
||||
func (s *UploadSessionStore) CleanupSession(sessionID string) {
|
||||
s.mutex.Lock()
|
||||
defer s.mutex.Unlock()
|
||||
|
||||
if session, exists := s.sessions[sessionID]; exists {
|
||||
os.RemoveAll(session.TempDir)
|
||||
delete(s.sessions, sessionID)
|
||||
s.removePersistedSession(sessionID)
|
||||
}
|
||||
}
|
||||
|
||||
// persistSession saves session to disk/redis
|
||||
func (s *UploadSessionStore) persistSession(session *ChunkedUploadSession) {
|
||||
// Try Redis first, fallback to disk
|
||||
if redisClient != nil && redisConnected {
|
||||
data, _ := json.Marshal(session)
|
||||
redisClient.Set(context.Background(), "upload_session:"+session.ID, data, 24*time.Hour)
|
||||
} else {
|
||||
// Fallback to disk persistence
|
||||
sessionFile := filepath.Join(s.tempDir, session.ID+".session")
|
||||
data, _ := json.Marshal(session)
|
||||
os.WriteFile(sessionFile, data, 0644)
|
||||
}
|
||||
}
|
||||
|
||||
// loadSession loads session from disk/redis
|
||||
func (s *UploadSessionStore) loadSession(sessionID string) *ChunkedUploadSession {
|
||||
var session ChunkedUploadSession
|
||||
|
||||
// Try Redis first
|
||||
if redisClient != nil && redisConnected {
|
||||
data, err := redisClient.Get(context.Background(), "upload_session:"+sessionID).Result()
|
||||
if err == nil {
|
||||
if json.Unmarshal([]byte(data), &session) == nil {
|
||||
return &session
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Fallback to disk
|
||||
sessionFile := filepath.Join(s.tempDir, sessionID+".session")
|
||||
data, err := os.ReadFile(sessionFile)
|
||||
if err == nil {
|
||||
if json.Unmarshal(data, &session) == nil {
|
||||
return &session
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// removePersistedSession removes persisted session data
|
||||
func (s *UploadSessionStore) removePersistedSession(sessionID string) {
|
||||
if redisClient != nil && redisConnected {
|
||||
redisClient.Del(context.Background(), "upload_session:"+sessionID)
|
||||
}
|
||||
sessionFile := filepath.Join(s.tempDir, sessionID+".session")
|
||||
os.Remove(sessionFile)
|
||||
}
|
||||
|
||||
// cleanupExpiredSessions periodically removes old sessions
|
||||
func (s *UploadSessionStore) cleanupExpiredSessions() {
|
||||
ticker := time.NewTicker(1 * time.Hour)
|
||||
defer ticker.Stop()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-ticker.C:
|
||||
s.mutex.Lock()
|
||||
now := time.Now()
|
||||
for sessionID, session := range s.sessions {
|
||||
if now.Sub(session.LastActivity) > 24*time.Hour {
|
||||
s.CleanupSession(sessionID)
|
||||
}
|
||||
}
|
||||
s.mutex.Unlock()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Helper functions
|
||||
func generateSessionID() string {
|
||||
return fmt.Sprintf("%d_%s", time.Now().Unix(), randomString(16))
|
||||
}
|
||||
|
||||
func getChunkSize() int64 {
|
||||
// Default 5MB chunks, configurable
|
||||
if conf.Uploads.ChunkSize != "" {
|
||||
if size, err := parseSize(conf.Uploads.ChunkSize); err == nil {
|
||||
return size
|
||||
}
|
||||
}
|
||||
return 5 * 1024 * 1024 // 5MB default
|
||||
}
|
||||
|
||||
func randomString(n int) string {
|
||||
const charset = "abcdefghijklmnopqrstuvwxyz0123456789"
|
||||
b := make([]byte, n)
|
||||
for i := range b {
|
||||
b[i] = charset[time.Now().UnixNano()%int64(len(charset))]
|
||||
}
|
||||
return string(b)
|
||||
}
|
||||
|
||||
func copyFileContent(dst, src *os.File) (int64, error) {
|
||||
// Use the existing buffer pool for efficiency
|
||||
bufPtr := bufferPool.Get().(*[]byte)
|
||||
defer bufferPool.Put(bufPtr)
|
||||
buf := *bufPtr
|
||||
|
||||
var written int64
|
||||
for {
|
||||
n, err := src.Read(buf)
|
||||
if n > 0 {
|
||||
w, werr := dst.Write(buf[:n])
|
||||
written += int64(w)
|
||||
if werr != nil {
|
||||
return written, werr
|
||||
}
|
||||
}
|
||||
if err != nil {
|
||||
if err.Error() == "EOF" {
|
||||
break
|
||||
}
|
||||
return written, err
|
||||
}
|
||||
}
|
||||
return written, nil
|
||||
}
|
||||
Reference in New Issue
Block a user