sync: cherry-pick feature commits from Kong/lua-resty-websocket - #1
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…NNECT (openresty#19) There are some cases where the websocket connection may go through a legacy http proxy server which only supports HTTP/1.0. When doing CONNECT request, the http proxy server will respond with HTTP/1.0 200 and that may fail the status line check in the current code. This PR loosen this a bit to support both HTTP/1.1 and HTTP/1.0 response for the CONNECT request. https://konghq.atlassian.net/browse/FTI-6683
…penresty#20) Part of https://konghq.atlassian.net/browse/FTI-6895 We need these new websocket client features to proceed the issue: 1. return the HTTP status code even if the connection fails, so that we can tell if an error is HTTP error or connection level error 2. return the HTTP headers even if the connection fails, so that we can honor the `retry-after` response code when the HTTP status code is 429.
…nresty#23) * fix(client): keep socket open on non-101 when keep_response=true When a caller sets `keep_response=true` in the connect options, leave the raw TCP socket open after a non-101 response, so the caller can still read the HTTP response body (RFC 6455 §4.1: "handle the response per HTTP procedures"). `self.fatal` is now set unconditionally for non-101 responses, regardless of `keep_response`, ensuring no WebSocket frames can be sent on a connection that never completed the WebSocket handshake. KAG-7707 * ci: pin all three lua modules to OpenResty 1.21.4.3 bundle versions - lua-nginx-module master: NGX_HTTP_LUA_VERSION undefined/changed, causing ngx.config.ngx_lua_version < 10025 check to fail - stream-lua-nginx-module master: ngx_stream_ssl_srv_conf_t removed - lua-resty-core master: requires stream module >= 0.0.18
…hen response header is not available (openresty#25) * fix(client.lua): add nil check for response headers to handle cases when the response header is not available
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Included review availability: 2 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. 📝 WalkthroughWalkthroughThe client adds WSS proxy negotiation, proxy authorization, response status and header accessors, and non-101 response handling. Integration tests cover proxied connections, failed handshakes, and stream-enabled CI support. ChangesWSS proxy and response handling
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant WebSocketClient
participant ForwardProxy
participant WebSocketServer
WebSocketClient->>ForwardProxy: Send CONNECT request
ForwardProxy->>WebSocketServer: Open upstream connection
WebSocketServer-->>ForwardProxy: Return upstream connection
ForwardProxy-->>WebSocketClient: Return 200 tunnel response
WebSocketClient->>WebSocketServer: Perform TLS and WebSocket handshake
WebSocketServer-->>WebSocketClient: Return status and headers
WebSocketClient-->>WebSocketClient: Cache response and set fatal state for non-101 status
Merge Risk: ⚪ Minimal · up to No actionable current-head merge risk remains from the reviewed proxy and response-handling changes. Important Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional. ❌ Failed checks (1 error, 1 warning)
✅ Passed checks (4 passed)
Full details: E2e Test Quality ReviewExplanation The PR adds real E2E coverage for HTTP forward proxying, proxy authentication, HTTP/1.0 CONNECT responses, response metadata, and non-101 handshakes. However, it violates the blocking error-handling criterion in the new Resolution Handle every applicable socket and stream return value in Full details: Security CheckExplanation Category 1 — CRITICAL: Finding at Resolution Do not return sensitive response headers by default. Add a case-insensitive denylist for
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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In `@lib/resty/websocket/client.lua`:
- Line 221: Update the proxy handling around the scheme validation and CONNECT
request so an https proxy is never contacted with plaintext: either establish
TLS with the proxy before sending CONNECT and credentials, or explicitly reject
the https scheme if nested TLS is unsupported. Preserve the existing http proxy
behavior and ensure Proxy-Authorization is not transmitted before secure
transport is established.
- Line 221: Update the proxy URL handling around the bound ngx.re.match result
before the condition comparing m[1] with "http" and "https". When m is nil for
an unmatched non-Unix wss_proxy value, return "invalid proxy url"; preserve the
existing protocol validation for matched URLs.
- Line 226: Update the default assignment for connect_port in the proxy
connection logic to select port 80 when the proxy scheme is http and port 443
when it is https, while preserving any explicitly specified port.
- Line 238: Update the connection logic around sock:connect to track when the
selected proxy target is a Unix socket, including the wss_proxy Unix-address
path, and call the two-argument sock:connect(connect_addr, sock_opts) form for
that target; preserve the existing host/port connection form for TCP targets.
- Around line 360-361: Update _M.connect to clear resp_status_code, resp_header,
and resp_headers at the start of every connection attempt, before reusing the
socket or processing a new handshake, so failed or subsequent attempts cannot
expose stale response metadata.
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lib/resty/websocket/client.luat/count.tt/cs.tt/forward-proxy-server.luat/sanity.t
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The forward-proxy tests ported from Kong/lua-resty-websocket spin up
a fake proxy server via an nginx `stream {}` block, which needs the
stream core module and stream-lua-nginx-module. Add both to the CI
build, matching what Kong's own CI already builds with.
We replaced this repo's own non-101 handshake rejection with Kong's
implementation, which uses a different error message ('unexpected
HTTP response code: N' instead of 'failed websocket handshake:
unexpected response status: N'). Update the pre-existing assertions
in handshake.t accordingly.
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…code - connect(): clear resp_status_code/resp_header/resp_headers at the start of every attempt, so a client instance reused across multiple connect() calls (pool-reused connection, or a retry after failure) never exposes stale data from a previous attempt. - proxy URL parsing: guard against an unmatched proxy_url indexing a nil match result; explicitly reject an https:// wss_proxy instead of silently treating it like http (TLS to the proxy itself was never implemented, so accepting it would send the CONNECT request and any Proxy-Authorization in the clear while the scheme implied otherwise). With https rejected, the only remaining valid scheme is http, so the proxy's default port is now correctly 80 instead of always 443. - proxy connect(): track whether the actual connect target is a Unix socket independently of whether the original wss:// URI was one, so a Unix-socket wss_proxy used against a non-Unix target now uses the two-argument sock:connect() form instead of passing a nil port. - t/forward-proxy-server.lua: stop logging header values at DEBUG level, since this included the Proxy-Authorization credential.
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Summary
Cherry-picks feature commits from Kong/lua-resty-websocket, another fork of openresty/lua-resty-websocket.
Kong's
masterhas 27 commits that don't exist in openresty/lua-resty-websocket. Most of them (early ssl_support check, custom host header, custom sec-websocket-key, discrete send/recv limits, socket connection pool reuse, etc.) turned out to already be implemented independently in upstream openresty, under different commits, which this repo already tracks. Those are skipped since we already have equivalent behavior.This PR only cherry-picks the 7 commits that genuinely add capabilities not present in upstream, each pulled in with
git cherry-pickso the original author, email and commit date are preserved:get_resp_headers()(Kong#16)Commits 4-7 replace this repo's existing
2606072(reject a non-101 handshake response) with Kong's more complete implementation: it keepsresp_status_code/response headers even on failure, unconditionally setsfatal, and adds akeep_responseoption.Conflict resolution
The conflicts hit during cherry-pick all came from this repo (tracking upstream openresty) and the Kong fork having evolved independently on top of the same code, not from any real logic disagreement:
.github/workflows/tests.yml); that file no longer exists here after this repo's own CI migration, so the conflict was resolved by keeping it deleted and only carrying over the functional change.License
Kong's fork had already corrected its rockspec's
licensefield to "2-clause BSD", matching this repo, so there's no licensing conflict.Testing
Test::Nginx::Socketwasn't available in the environment used to prepare this branch, so the fullt/*.tsuite could not be run locally; the change was checked withluajit -blfor syntax only. Please rely on CI to run the test suite.Summary by CodeRabbit