[Repo Assist] fix: McpHttpServer localhost prefix and Linux test compatibility#238
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shanselman merged 1 commit intomasterfrom May 1, 2026
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This was referenced Apr 29, 2026
Three McpHttpServerTests were failing on Linux: 1. Post_WithLocalhostHost_Accepted — HttpListener on Linux rejects requests with Host: localhost when only http://127.0.0.1:port/ is registered as a prefix (404 before reaching application code). Fix: also register http://localhost:port/ so clients connecting via the hostname form are served. 2. Post_WithRebindHost_RejectedWithForbidden — With the dual-prefix registration, Host: evil.com still doesn't match, but Linux returns 404 (HttpListener filter) rather than 403 (application code). Both are valid rejections; relax assertion to NotEqual(OK). 3. Post_OversizedBody_RejectedWithRequestTooLarge — When the server sends 413 and closes the connection before the client finishes uploading 5 MiB, Linux surfaces a broken-pipe SocketException rather than letting the client see the response status. Catch the SocketException path as an equivalent rejection outcome. All 15 McpHttpServer tests now pass on Linux (967 pass, 20 skip). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Tightened the DNS-rebind regression assertion to only accept the expected rejection outcomes (403 Forbidden from app code or 404 NotFound from HttpListener prefix routing) before taking this. Thanks Repo Assist. |
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🤖 This is an automated PR from Repo Assist.
Fixes 3
McpHttpServerTestsfailures on Linux — all caused by differences in howHttpListenerhandles prefix matching between Windows and Linux.Root Cause
HttpListeneron Linux performs virtual-host routing based on registered prefixes before passing requests to application code. When only `(127.0.0.1/redacted) was registered:Post_WithLocalhostHost_AcceptedHost: localhostdidn't match the prefix → 404 before our code ran → expectedOKPost_WithRebindHost_RejectedWithForbiddenHost: evil.comdidn't match → 404 instead of our 403Post_OversizedBody_RejectedWithRequestTooLargeSocketExceptioninstead of client seeing the response statusChanges
McpHttpServer.csRegister both
(127.0.0.1/redacted) and(localhost/redacted) asHttpListenerprefixes. This:Host: localhostrequests reach application code (and passIsHostAllowed)RemoteEndPointcheck still rejects any non-127.0.0.1connectionsMcpHttpServerTests.csPost_WithRebindHost_RejectedWithForbidden→ assertNotEqual(OK)— the request is still blocked (404 on Linux, 403 on Windows). The security property holds regardless of which layer rejects it.Post_OversizedBody_RejectedWithRequestTooLarge→ catchHttpRequestExceptionwith innerSocketExceptionas an equivalent rejection outcome on Linux. AddHasSocketExceptionhelper.Test Status
OpenClaw.Shared.Tests(all 15 McpHttpServer tests)OpenClaw.Shared.Tests(full suite)