8e550b9785
This commit captures both the prior accumulated work-in-progress
(framework migration web/→svelte/, postgres storage, conversation
viewer, dashboard auth, OpenAPI spec, integration tests) AND today's
operational improvements layered on top. History wasn't checkpointed
incrementally; happy to split it via interactive rebase if a reviewer
wants smaller commits.
Today's changes (in addition to the older WIP):
1. Configurable upstream response-header timeout
- ANTHROPIC_RESPONSE_HEADER_TIMEOUT env (default 300s)
- Replaces hardcoded 300s in provider/anthropic.go that was firing
on opus + 1M-context + extended thinking non-streaming requests
- Files: internal/config/config.go, internal/provider/anthropic.go
2. Structured forward-error diagnostic logging
- When a forward to Anthropic fails, log a single key=value line
with request_id, model, stream, body_bytes, has_thinking,
anthropic_beta, query, elapsed, ctx_err — alongside the existing
human-readable error line for back-compat
- Files: internal/handler/handlers.go (logForwardFailure)
3. Full SSE protocol passthrough + Flusher fix
- handler/handlers.go: forward all SSE lines verbatim (event:, id:,
retry:, : comments, blank-line terminators), not only data:.
Previous code produced malformed SSE for strict parsers.
- middleware/logging.go: explicit Flush() method on responseWriter.
Embedding http.ResponseWriter (interface) does not auto-promote
Flush(), so every w.(http.Flusher) check in the streaming
handler was returning ok=false and SSE writes buffered in net/http
until the body closed.
4. Non-streaming → streaming demotion (feature-flagged)
- ANTHROPIC_DEMOTE_NONSTREAMING env (default false)
- When enabled and the routed provider is anthropic, force stream=true
upstream for clients that asked for stream=false. Receive SSE,
accumulate via accumulateSSEToMessage (handles text, tool_use with
partial_json reassembly, thinking, signature, citations_delta,
usage merge), and synthesize a single non-streaming JSON response.
- Eliminates the ResponseHeaderTimeout class of failure entirely.
- Body rewrite uses json.Decoder + UseNumber() to preserve integer
precision in unknown nested fields (tool inputs from prior turns).
- Files: internal/config/config.go, internal/handler/handlers.go,
cmd/proxy/main.go, cmd/proxy/main_test.go
5. Live operational state: /livez gauge + graceful drain
- New internal/runtime package: atomic in-flight counter + draining flag
- New middleware/inflight.go: increments runtime gauge, applied to
/v1/* subrouter so Messages, ChatCompletions, and ProxyPassthrough
are all counted
- /v1/* moved to a gorilla/mux subrouter so the InFlight middleware
applies surgically; /health, /livez, /openapi.* remain on parent
router (unauthenticated, uncounted)
- Health handler returns 503 draining when runtime.IsDraining() is
true, so Traefik stops routing to a slot before drain begins
- New /livez handler returns {status, in_flight, draining, timestamp}
- SIGTERM handler in main.go: SetDraining(true), poll for in_flight==0
with 32-min ceiling and 1s tick (logs every 10s), then srv.Shutdown
- Auth bypass list extended with /livez
- Files: internal/runtime/runtime.go (new),
internal/middleware/inflight.go (new),
internal/middleware/auth.go,
internal/handler/handlers.go (Health, Livez, runtime import),
cmd/proxy/main.go (subrouter, drain loop)
6. OpenAPI spec updates
- Document Health 503 response and new DrainingResponse schema
- Add /livez path with LivezResponse schema
- Files: internal/handler/openapi.go
Verified: go build ./... clean, go test ./... all pass, go vet clean.
Three rounds of codex peer review across changes 1-5; all feedback
addressed (citations_delta, json.Number precision, drain-loop logging
via lastLog timestamp, PathPrefix tightened to "/v1/").
57 lines
2.1 KiB
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57 lines
2.1 KiB
Text
# Claude Code Proxy Configuration
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# Server Configuration
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SERVER_HOST=127.0.0.1
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PORT=3001
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READ_TIMEOUT=500
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WRITE_TIMEOUT=500
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IDLE_TIMEOUT=500
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# Anthropic API Configuration
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# URL to forward requests to (the actual Anthropic API)
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ANTHROPIC_FORWARD_URL=https://api.anthropic.com
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ANTHROPIC_VERSION=2023-06-01
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ANTHROPIC_MAX_RETRIES=3
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# OpenAI Configuration (for subagent routing)
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# OPENAI_API_KEY=your-openai-api-key
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# OPENAI_BASE_URL=https://api.openai.com
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# OPENAI_ALLOW_CLIENT_API_KEY=false
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# OPENAI_CLIENT_API_KEY_HEADER=x-openai-api-key
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# Auth Configuration
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# AUTH_ENABLED=false
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# AUTH_TOKEN=change-me
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# AUTH_API_KEY_HEADER=x-api-key
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# AUTH_ALLOW_LOCALHOST_BYPASS=true
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# Dashboard Auth (protects web UI and data endpoints with HTTP basic auth)
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# When set, accessing the dashboard or /api/* data routes requires user "admin"
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# with this password. Proxy endpoints (/v1/messages, /health) are NOT affected.
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# DASHBOARD_PASSWORD=change-me-to-a-strong-password
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# Reverse-proxy deployments
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# Set this to true when the proxy itself binds publicly but is only reachable
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# through a trusted reverse proxy such as Traefik.
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# TRUST_PROXY=true
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# Storage Configuration
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# DB_TYPE=sqlite
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# DATABASE_URL=postgresql://user:password@localhost:5432/claude_code_proxy?sslmode=disable
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# TEST_POSTGRES_DSN=postgresql://user:password@localhost:5432/claude_code_proxy_test?sslmode=disable
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# TEST_POSTGRES_USER=test
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# TEST_POSTGRES_PASSWORD=test
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# TEST_POSTGRES_DB=claude_code_proxy_test
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# TEST_POSTGRES_PORT=5434
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DB_PATH=requests.db
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STORAGE_CAPTURE_REQUEST_BODY=true
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STORAGE_CAPTURE_RESPONSE_BODY=true
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STORAGE_METADATA_ONLY=false
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STORAGE_RETENTION_DAYS=0
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# STORAGE_REDACTED_FIELDS=api_key,authorization,token,password,secret,access_token,refresh_token,client_secret
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# CORS Configuration (comma-separated values)
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# Defaults are permissive. Set these explicitly if you want tighter browser access.
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# CORS_ALLOWED_ORIGINS=http://localhost:3000,http://127.0.0.1:3000,http://localhost:5174,http://127.0.0.1:5174
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# CORS_ALLOWED_METHODS=GET,POST,DELETE,OPTIONS
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# CORS_ALLOWED_HEADERS=Accept,Authorization,Content-Type,Anthropic-Version,Anthropic-Beta,X-API-Key,X-Requested-With
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