Each listener now tracks chain setup latency independently via a
dict[str, LatencyTracker] on Metrics. The global aggregate stays for
summary output. /status embeds per-listener latency on each listener
entry; /metrics includes a listener_latency map keyed by host:port.
Add RateTracker (rolling deque, events/sec) and LatencyTracker (circular
buffer, p50/p95/p99 in ms) to the Metrics class. Both are recorded in
_handle_client and exposed via summary(), to_dict(), /status, and /metrics.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Each listener binds to its own port with an independent chain.
The "pool" keyword in a chain appends a random alive proxy from
the shared pool; multiple pool entries = multiple hops.
:1080 -> Tor only (0 pool hops)
:1081 -> Tor + 1 pool proxy
:1082 -> Tor + 2 pool proxies
Shared resources (ProxyPool, Tor, metrics, semaphore, API) are
reused across listeners. FirstHopPool is shared per unique first
hop. Backward compatible: old listen/chain format still works.
Replace _http_check (HTTP GET to httpbin.org) with _tls_check that
performs a TLS handshake through the proxy chain. Multiple targets
(google, cloudflare, amazon) rotated round-robin eliminate the single
point of failure. Lighter, faster, harder to block than HTTP.
- Add test_targets config field (replaces test_url)
- Backward compat: legacy test_url extracts hostname automatically
- Add ssl.create_default_context() and round-robin index to ProxyPool
- Update docs (example.yaml, USAGE.md, CHEATSHEET.md)
29 tests covering request parsing, JSON response format, all GET/POST
handlers with mock context, 404/405 error routing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add FirstHopPool that maintains a deque of pre-established TCP
connections to chain[0]. Connections idle beyond pool_max_idle are
evicted; a background task refills to pool_size. build_chain() tries
the pool first, falls back to open_connection. Enabled with
pool_size > 0 in config. Only pools the TCP handshake -- SOCKS/HTTP
tunnels are consumed, not returned.
Replace blocking urllib with a minimal async HTTP/1.1 client (http.py)
using asyncio streams. Pool source fetches now run in parallel via
asyncio.gather. Dead proxy reporting uses async POST. Handles
Content-Length, chunked transfer-encoding, and connection-close bodies.
No new dependencies.
Add max_connections config (default 256) with -m/--max-connections CLI
flag. Server wraps on_client in asyncio.Semaphore to prevent fd
exhaustion under load. Value reloads on SIGHUP; active connections
drain normally. Also adds pool_size/pool_max_idle config fields and
first_hop_pool wiring in server.py (used by next commits), and fixes
asyncio.TimeoutError -> TimeoutError lint warnings.
When report_url is configured, POST evicted proxy list as JSON after
each health test cycle. Fire-and-forget: failures are logged at debug
level. Payload format: {"dead": [{"proto": "socks5", "proxy": "host:port"}]}.
Test the static chain (without pool proxy) before running pool health
tests. If the chain itself is unreachable, skip proxy testing and log a
clear warning. Prevents false mass-failure when the issue is upstream
(e.g., Tor is down), not the exit proxies.
On warm start (state has alive proxies), only quick-test the
previously-alive subset before serving. Full health test runs in
background. Cold start behavior unchanged (test all before serving).
Reduces startup blocking from minutes to seconds on warm restarts.
Evict proxies not returned by sources for >3 refresh cycles and not
currently alive. Cleans up proxies removed upstream faster than waiting
for max_fails consecutive health test failures.
Track last_fail timestamp on ProxyEntry. When a connection attempt fails
in server.py, report_failure() records the time. The selection weight
multiplies by min(fail_age/60, 1.0), ramping back from floor over 60s.
Prevents wasting retries on proxies that just failed.
Replace uniform random.choice with random.choices weighted by last_ok
recency. Proxies tested successfully more recently get higher selection
probability (weight = 1/(1 + age/300)), decaying over ~5 minutes.
ProxyPool replaces ProxySource with:
- Multiple sources: HTTP APIs and text files (one proxy URL per line)
- Deduplication by proto://host:port
- Health testing: full chain test with configurable concurrency
- Mass-failure guard: skip eviction when >90% fail
- Background loops for periodic refresh and health checks
- JSON state persistence with atomic writes (warm starts)
- Backward compat: ProxySource still works for legacy configs
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Asyncio-based SOCKS5 server that tunnels connections through
configurable chains of SOCKS5, SOCKS4/4a, and HTTP CONNECT proxies.
Tor integration via standard SOCKS5 hop.
