Add HTTP Proxy on Gateway

[matheusfrancisco]

📝 Description

Technical Details

• Server: HTTP server on configurable listen address
• Protocol: Forwards raw HTTP requests via gRPC to agents
• Response handling: Parses HTTP responses and forwards headers/body
• Error handling: Graceful degradation with proper HTTP error codes

This PR introduces the HTTP proxy on the gateway.
Features

• Token-based authentication
• Header: Proxy-Token:
• Cookie: hoop_proxy_token (set via URL path)

URL path: / or //path for initial browser auth

• Session management
• Reuses gRPC sessions per token
• Validates credentials from database
• Token expiration and user token polling
• Session cleanup on expiration/shutdown

Browser support

• Cookie-based auth after initial token visit
• Automatic redirect handling
• Works with standard browsers

Concurrency

• Channel buffering (size 10) to reduce blocking
• Send/receive timeouts (30s send, 2min receive)
• Non-blocking response handling
• Multiple concurrent requests per session

URL rewriting

• Passes proxy_base_url to agent for redirect rewriting
• Supports HTTP/HTTPS based on TLS config

🔗 Related Issue

Fixes #

🚀 Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🎨 Style/UI update
• ♻️ Code refactor
• ⚡ Performance improvement
• ✅ Test update
• 🔧 Build configuration change
• 🧹 Chore

📋 Changes Made

• add: http proxy on gateway

🧪 Testing

Test Configuration:

• Browser(s):
• OS:

Tests performed:

• Unit tests pass
• Integration tests pass
• Manual testing completed

📸 Screenshots (if applicable)

✅ Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

📄 Additional Notes

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[sandromello]

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[sandromello]

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