ci: qualify HTTP resilience on macOS and Windows

.github/workflows/http-platforms.yml

@@ -0,0 +1,55 @@
+name: HTTP resilience cross-OS
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+    paths:
+      - .github/workflows/http-platforms.yml
+      - pom.xml
+      - teaql-core/**
+      - teaql-runtime/**
+      - teaql-context-runtime-tools/**
+      - teaql-tool-http/**
+      - examples/http-resilience/**
+  pull_request:
+    branches: [main]
+    paths:
+      - .github/workflows/http-platforms.yml
+      - pom.xml
+      - teaql-core/**
+      - teaql-runtime/**
+      - teaql-context-runtime-tools/**
+      - teaql-tool-http/**
+      - examples/http-resilience/**
+
+permissions:
+  contents: read
+
+jobs:
+  http-resilience:
+    name: HTTP contract and example (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-26, macos-26-intel, windows-2025]
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: temurin
+          cache: maven
+      - name: Run focused HTTP contract tests
+        run: >-
+          mvn -B -pl teaql-tool-http -am
+          -Dtest=HttpResilienceTest
+          -Dsurefire.failIfNoSpecifiedTests=false test
+      - name: Run Context-owned HTTP example twice
+        run: bash examples/http-resilience/verify.sh

teaql-tool-http/src/test/java/io/teaql/tools/http/HttpResilienceTest.java

@@ -668,15 +668,17 @@ private void handle(Socket socket) {
                         if (line.toLowerCase(java.util.Locale.ROOT).startsWith("content-length:"))
                             contentLength = Integer.parseInt(line.substring(line.indexOf(':') + 1).trim());
                     }
-                    if (target.contains("/retry-post")) {
+                    // Drain the request before replying. Closing a socket with unread POST bytes
+                    // can reset an otherwise valid response on Windows TCP stacks.
+                    if (target.contains("/retry-post") || target.contains("/private-response")) {
                         char[] body = new char[contentLength];
                         int offset = 0;
                         while (offset < body.length) {
                             int count = reader.read(body, offset, body.length - offset);
                             if (count < 0) return;
                             offset += count;
                         }
-                        retryBodies.add(new String(body));
+                        if (target.contains("/retry-post")) retryBodies.add(new String(body));
                     }
                     if (target.contains("/close")) return;
                     if (target.endsWith("/slow")) Thread.sleep(300);