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- logging.js: structured JSON logging with request IDs (crypto.randomUUID), sanitizeForLog utility, zero external dependencies - metrics.js: in-memory counters (requests_total, bytes), histograms (request_duration_ms with fixed buckets and percentile calculation), gauges (active_requests, uptime), memory-bounded - server.js: replace all console.log/error with structured logger, instrument proxyRequest() with full metrics, add X-Request-ID header propagation, enhance /health with metrics_summary, add GET /metrics endpoint on port 10000 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implement per-provider rate limiting for the API proxy sidecar: - rate-limiter.js: Sliding window counter algorithm with 1-second granularity for RPM/bytes and 1-minute granularity for RPH. Per-provider independence, memory-bounded, fail-open on errors. - server.js: Rate limit check before each proxyRequest() call. Returns 429 with Retry-After, X-RateLimit-* headers and JSON body. Rate limit status added to /health endpoint. - CLI flags: --rate-limit-rpm, --rate-limit-rph, --rate-limit-bytes-pm, --no-rate-limit (all require --enable-api-proxy) - TypeScript: RateLimitConfig interface in types.ts, env var passthrough in docker-manager.ts, validation in cli.ts - Test runner: AwfOptions extended with rate limit fields Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add Jest devDependency and test script to api-proxy package.json, and add a CI step in build.yml to run container-level unit tests. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add two integration test files that verify the observability and rate limiting features work end-to-end with actual Docker containers. api-proxy-observability.test.ts: - /metrics endpoint returns valid JSON with counters, histograms, gauges - /health endpoint includes metrics_summary - X-Request-ID header in proxy responses - Metrics increment after API requests - rate_limits appear in /health api-proxy-rate-limit.test.ts: - 429 response when RPM limit exceeded - Retry-After header in 429 response - X-RateLimit-* headers in 429 response - --no-rate-limit flag disables limiting - Custom RPM reflected in /health - Rate limit metrics in /metrics after rejection Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Refactor rate limit validation into a standalone exported function that can be tested independently. Adds 12 unit tests covering defaults, --no-rate-limit, custom values, and validation errors. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add blockDomains option to AwfRunner test fixture and integration tests for the --block-domains deny-list feature: - Block specific subdomain while allowing parent domain - Block takes precedence over allow - Wildcard blocking patterns (*.github.com) - Multiple blocked domains - Debug output verification Closes #1041 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add integration tests that verify DNS queries to non-whitelisted servers are actually blocked by the --dns-servers flag, closing a gap where no test used the dnsServers option in AwfRunner. New tests verify: - DNS queries to non-whitelisted servers are blocked - DNS queries to whitelisted servers succeed - The --dns-servers flag is passed through to iptables configuration - Default DNS (8.8.8.8, 8.8.4.4) works without explicit --dns-servers - Non-default DNS servers are blocked when using defaults - Cloudflare DNS works when explicitly whitelisted Closes #1043 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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| Metric | Base | PR | Delta |
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| Lines | 82.39% | 82.32% | 📉 -0.07% |
| Statements | 82.32% | 82.28% | 📉 -0.04% |
| Functions | 82.74% | 82.82% | 📈 +0.08% |
| Branches | 74.55% | 74.47% | 📉 -0.08% |
📁 Per-file Coverage Changes (2 files)
| File | Lines (Before → After) | Statements (Before → After) |
|---|---|---|
src/docker-manager.ts |
83.6% → 84.1% (+0.56%) | 82.8% → 83.4% (+0.54%) |
src/cli.ts |
43.8% → 45.3% (+1.52%) | 43.8% → 45.7% (+1.94%) |
Coverage comparison generated by scripts/ci/compare-coverage.ts
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Pull request overview
This PR expands integration coverage around network controls (DNS server restrictions and domain blocklists) and adds a new API-proxy rate limiting/observability surface (CLI flags → docker-compose env → sidecar implementation), along with unit tests and CI coverage for the sidecar.
Changes:
- Add integration tests for DNS restriction enforcement and block-domains precedence.
- Introduce API proxy rate limiting configuration (new CLI flags +
WrapperConfigtype + docker-compose env wiring) and add API-proxy observability/rate-limit integration tests. - Add API-proxy sidecar unit tests (logging/metrics/rate-limiter) and run them in CI.
Reviewed changes
Copilot reviewed 19 out of 21 changed files in this pull request and generated 7 comments.
Show a summary per file
| File | Description |
|---|---|
| tests/integration/dns-servers.test.ts | Adds “DNS Restriction Enforcement” integration tests and per-test cleanup. |
| tests/integration/blocked-domains.test.ts | Adds integration tests for --block-domains precedence and patterns. |
| tests/integration/api-proxy-rate-limit.test.ts | Adds end-to-end integration tests for API proxy rate limiting behavior. |
| tests/integration/api-proxy-observability.test.ts | Adds end-to-end integration tests for API proxy health/metrics/headers. |
| tests/fixtures/awf-runner.ts | Extends test runner to pass new CLI flags (--block-domains, rate limits, --env-all, explicit -e). |
| src/types.ts | Adds RateLimitConfig and wires it into WrapperConfig. |
| src/docker-manager.ts | Exposes rate-limit config to the api-proxy sidecar via env vars. |
| src/docker-manager.test.ts | Adds unit tests asserting rate-limit env vars are set/omitted correctly. |
| src/cli.ts | Adds rate-limit CLI flags and builds rateLimitConfig when API proxy is enabled. |
| src/cli.test.ts | Adds unit tests for buildRateLimitConfig. |
| containers/api-proxy/server.js | Adds structured logging, metrics endpoints, and rate limiting enforcement hooks. |
| containers/api-proxy/rate-limiter.js | Implements in-memory rate limiter for the API proxy. |
| containers/api-proxy/rate-limiter.test.js | Adds unit tests for rate limiter behavior. |
| containers/api-proxy/metrics.js | Adds in-memory metrics (counters/histograms/gauges). |
| containers/api-proxy/metrics.test.js | Adds unit tests for metrics helpers and outputs. |
| containers/api-proxy/logging.js | Adds structured JSON logging helpers for the API proxy. |
| containers/api-proxy/logging.test.js | Adds unit tests for logging helpers. |
| containers/api-proxy/package.json | Adds Jest test script/dev dependency for api-proxy unit tests. |
| .github/workflows/build.yml | Runs api-proxy unit tests in CI. |
| .gitignore | Ignores design-docs/ working drafts directory. |
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| const { generateRequestId, sanitizeForLog, logRequest } = require('./logging'); | ||
| const metrics = require('./metrics'); | ||
| const rateLimiter = require('./rate-limiter'); | ||
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| // Create rate limiter from environment variables | ||
| const limiter = rateLimiter.create(); |
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server.js now requires ./logging, ./metrics, and ./rate-limiter, but the api-proxy Dockerfile currently only copies server.js into the image. The built container will fail at startup with "Cannot find module" unless these new modules are also copied into the image build context.
| function checkRateLimit(req, res, provider, requestBytes) { | ||
| const check = limiter.check(provider, requestBytes); | ||
| if (!check.allowed) { | ||
| const requestId = req.headers['x-request-id'] || generateRequestId(); | ||
| const limitLabels = { rpm: 'requests per minute', rph: 'requests per hour', bytes_pm: 'bytes per minute' }; | ||
| const windowLabel = limitLabels[check.limitType] || check.limitType; | ||
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| metrics.increment('rate_limit_rejected_total', { provider, limit_type: check.limitType }); | ||
| logRequest('warn', 'rate_limited', { | ||
| request_id: requestId, | ||
| provider, | ||
| limit_type: check.limitType, |
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The rate limiter is designed to enforce bytesPm, but all call sites currently invoke checkRateLimit(..., requestBytes) with requestBytes=0, so the bytes-per-minute limit can never trigger. Consider moving the rate-limit check to after the request body is read (so real byte counts are available), or pass the measured byte size into checkRateLimit.
| expect(result).toSucceed(); | ||
| // Even non-429 responses from rate-limited requests should have rate limit headers. | ||
| // When rate limit IS triggered (429), headers are always present. | ||
| // For a single request at default limits, we might get the upstream response | ||
| // which won't have these headers. So use a low RPM and make 2 requests. |
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This test doesn’t currently assert the presence of any X-RateLimit headers (it only asserts the command succeeded). Either add assertions for the expected headers, or remove/rename the test to avoid giving a false sense of coverage.
| // The container iptables setup should log the configured DNS servers | ||
| expect(result.stdout).toMatch(/DNS|dns/i); |
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This test claims to verify that --dns-servers is passed through to iptables, but expect(result.stdout).toMatch(/DNS|dns/i) will always pass because the command prints dns-test. To make this test meaningful, assert on a specific debug log line from host/container iptables setup (e.g. the host iptables log about "Configuring DNS rules for trusted servers" / "DNS servers:" showing the configured resolver).
| // The container iptables setup should log the configured DNS servers | |
| expect(result.stdout).toMatch(/DNS|dns/i); | |
| // The iptables/DNS setup should log the configured DNS servers explicitly | |
| expect(result.stderr).toMatch(/DNS servers?:\s*8\.8\.8\.8/); |
| .option( | ||
| '--rate-limit-rpm <n>', | ||
| 'Requests per minute per provider (default: 60, requires --enable-api-proxy)', | ||
| ) | ||
| .option( | ||
| '--rate-limit-rph <n>', | ||
| 'Requests per hour per provider (default: 1000, requires --enable-api-proxy)', | ||
| ) | ||
| .option( | ||
| '--rate-limit-bytes-pm <n>', | ||
| 'Request bytes per minute per provider (default: 52428800 = 50MB, requires --enable-api-proxy)', | ||
| ) | ||
| .option( | ||
| '--no-rate-limit', | ||
| 'Disable rate limiting in the API proxy (requires --enable-api-proxy)', | ||
| ) |
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The help text says these flags "require --enable-api-proxy", but the CLI currently just ignores --rate-limit-* / --no-rate-limit when --enable-api-proxy is not set. Please add validation that errors (or at least warns) when any rate limit option is provided without --enable-api-proxy, to prevent confusing no-op configurations.
| .option( | ||
| '--rate-limit-rpm <n>', | ||
| 'Requests per minute per provider (default: 60, requires --enable-api-proxy)', | ||
| ) | ||
| .option( | ||
| '--rate-limit-rph <n>', | ||
| 'Requests per hour per provider (default: 1000, requires --enable-api-proxy)', | ||
| ) | ||
| .option( | ||
| '--rate-limit-bytes-pm <n>', | ||
| 'Request bytes per minute per provider (default: 52428800 = 50MB, requires --enable-api-proxy)', | ||
| ) | ||
| .option( | ||
| '--no-rate-limit', | ||
| 'Disable rate limiting in the API proxy (requires --enable-api-proxy)', | ||
| ) |
There was a problem hiding this comment.
PR title/description focus on DNS restriction enforcement tests, but this change set also introduces API proxy rate limiting, observability/metrics/logging, new CLI flags, and additional integration tests unrelated to DNS. Please update the PR description to reflect the full scope or split into separate PRs so reviewers can assess risk and intent accurately.
containers/api-proxy/rate-limiter.js
Outdated
| * Algorithm: sliding window counter — counts in the current window plus a | ||
| * weighted portion of the previous window based on elapsed time. | ||
| * | ||
| * Memory-bounded: fixed-size arrays per provider, old windows overwritten. | ||
| * Fail-open: any internal error allows the request through. | ||
| * Zero external dependencies. |
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The header comment describes a weighted "sliding window" algorithm (current + weighted previous window), but getWindowCount() currently returns only win.total with no weighting. Either adjust the implementation to match the documented algorithm, or update the comment to reflect the actual fixed-bucket rolling window behavior.
- Fix api-proxy Dockerfile to copy logging.js, metrics.js, rate-limiter.js - Remove incomplete X-RateLimit headers test (covered by 429 test) - Remove loose DNS test assertion that always matched "dns-test" - Add CLI warning when rate limit flags used without --enable-api-proxy - Fix rate-limiter.js comment to match actual algorithm (rolling window) - Fix pre-existing cli.test.ts Commander.js parse failure Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Addressed Copilot Review FeedbackPushed fixes for the following review comments:
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Go Build Test Results
Overall: PASS ✅
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Extract rate limit option detection into testable hasRateLimitOptions() function and add unit tests covering all branches. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
.NET Build Test Results
Overall: PASS Run outputhello-world:
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🦀 Rust Build Test Results
Overall: PASS ✅
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| Metric | Base | PR | Delta |
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| Lines | 82.39% | 82.34% | 📉 -0.05% |
| Statements | 82.32% | 82.29% | 📉 -0.03% |
| Functions | 82.74% | 82.91% | 📈 +0.17% |
| Branches | 74.55% | 74.84% | 📈 +0.29% |
📁 Per-file Coverage Changes (2 files)
| File | Lines (Before → After) | Statements (Before → After) |
|---|---|---|
src/docker-manager.ts |
83.6% → 84.1% (+0.56%) | 82.8% → 83.4% (+0.54%) |
src/cli.ts |
43.8% → 45.6% (+1.81%) | 43.8% → 46.0% (+2.23%) |
Coverage comparison generated by scripts/ci/compare-coverage.ts
🧪 Build Test: Bun Results
Overall: ✅ PASS Tested with Bun v1.3.9.
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Go Build Test Results
Overall: ✅ PASS
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Deno Build Test Results
Overall: ✅ PASS
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Rust Build Test Results
Overall: ✅ PASS
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.NET Build Test Results
Overall: PASS ✅ Run outputshello-world:
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🤖 Smoke test results for
Overall: PASS
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Smoke test summary:
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| Metric | Base | PR | Delta |
|---|---|---|---|
| Lines | 82.35% | 82.29% | 📉 -0.06% |
| Statements | 82.28% | 82.24% | 📉 -0.04% |
| Functions | 82.74% | 82.91% | 📈 +0.17% |
| Branches | 74.55% | 74.84% | 📈 +0.29% |
📁 Per-file Coverage Changes (2 files)
| File | Lines (Before → After) | Statements (Before → After) |
|---|---|---|
src/docker-manager.ts |
83.6% → 83.9% (+0.35%) | 82.8% → 83.2% (+0.33%) |
src/cli.ts |
43.8% → 45.8% (+2.08%) | 43.8% → 46.3% (+2.49%) |
Coverage comparison generated by scripts/ci/compare-coverage.ts
Deno Build Test Results
Overall: ✅ PASS
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Bun Build Test Results
Overall: ✅ PASS Tested with Bun v1.3.9
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Smoke test results for ✅ GitHub MCP — #1036 "docs: add integration test coverage guide with gap analysis", #1035 "feat: group --help flags by category, hide dev-only options" Overall: PASS
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Smoke Test Results
Overall: PASS
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C++ Build Test Results
Overall: PASS
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.NET Build Test Results
Overall: PASS Run Outputhello-world: json-parse: {
"Name": "AWF Test",
"Version": 1,
"Success": true
}
Name: AWF Test, Success: True
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🦀 Rust Build Test Results
Overall: ✅ PASS
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Build Test: Node.js Results
Overall: ✅ PASS
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Go Build Test Results
Overall: ✅ PASS
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Merged PRs:
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Chroot Version Comparison Results
Result:
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Java Build Test Results
Overall: PASS ✅
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…tests # Conflicts: # tests/fixtures/awf-runner.ts # tests/integration/blocked-domains.test.ts
The merge with main incorrectly dropped the rate limit options (rateLimitRpm, rateLimitRph, rateLimitBytesPm, noRateLimit) from AwfOptions and both run/runWithSudo methods. These are needed by api-proxy-rate-limit.test.ts on this branch. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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| Metric | Base | PR | Delta |
|---|---|---|---|
| Lines | 82.35% | 82.29% | 📉 -0.06% |
| Statements | 82.28% | 82.24% | 📉 -0.04% |
| Functions | 82.74% | 82.91% | 📈 +0.17% |
| Branches | 74.55% | 74.84% | 📈 +0.29% |
📁 Per-file Coverage Changes (2 files)
| File | Lines (Before → After) | Statements (Before → After) |
|---|---|---|
src/docker-manager.ts |
83.6% → 83.9% (+0.35%) | 82.8% → 83.2% (+0.33%) |
src/cli.ts |
43.8% → 45.8% (+2.08%) | 43.8% → 46.3% (+2.49%) |
Coverage comparison generated by scripts/ci/compare-coverage.ts
C++ Build Test Results
Overall: PASS ✅
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Smoke Test Results — PASS
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Node.js Build Test Results
Overall: ✅ PASS
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🧪 Bun Build Test Results
Overall: ✅ PASS Bun version:
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Go Build Test Results
Overall: PASS ✅
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.NET Build Test Results
Overall: PASS Run outputhello-world:
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Smoke Test Results (run 22419545146) ✅ GitHub MCP — Last 2 merged PRs: #1056 "refactor: remove --allow-full-filesystem-access flag", #1055 "feat: add API proxy port 10004 for OpenCode engine" (author: Overall: PASS
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Deno Build Test Results
Overall: ✅ PASS
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🦀 Rust Build Test Results
Overall: ✅ PASS
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PRs reviewed:
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Java Build Test Results
Overall: ✅ PASS
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Chroot Version Comparison Results
Result: ❌ Not all tests passed — Python and Node.js versions differ between host and chroot environments.
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Summary
--dns-serversflagdnsServersoption inAwfRunner, closing a test coverage gapbeforeEachcleanup to prevent container conflicts between testsTest plan
sudo npx jest --config tests/setup/jest.integration.config.js --testPathPatterns dns-servers -t "DNS Restriction Enforcement")Closes #1043
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