fix: extend proxy timeout for Office rendering

internal/api/runtime_office_test.go

@@ -0,0 +1,167 @@
+package api
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"net/http/httputil"
+	"net/url"
+	"strings"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+func officeTestProxy(t *testing.T, upstream string, officeTimeout time.Duration) *httputil.ReverseProxy {
+	t.Helper()
+	target, err := url.Parse(upstream)
+	if err != nil {
+		t.Fatal(err)
+	}
+	normal := runtimeTransport.Clone()
+	office := runtimeOfficeTransport.Clone()
+	normal.ResponseHeaderTimeout = 30 * time.Millisecond
+	office.ResponseHeaderTimeout = officeTimeout
+	t.Cleanup(normal.CloseIdleConnections)
+	t.Cleanup(office.CloseIdleConnections)
+	proxy := runtimeReverseProxy(target, "/dsh/office-test", "panel.test", "runtime=secret")
+	proxy.Transport = runtimeProxyTransport{normal: normal, office: office}
+	return proxy
+}
+
+func TestRuntimeOfficeTransportDefaults(t *testing.T) {
+	if got := runtimeTransport.ResponseHeaderTimeout; got != 20*time.Second {
+		t.Errorf("normal timeout = %s, want 20s", got)
+	}
+	if got := runtimeOfficeTransport.ResponseHeaderTimeout; got != 120*time.Second {
+		t.Errorf("office timeout = %s, want 120s", got)
+	}
+	if runtimeTransport == runtimeOfficeTransport {
+		t.Fatal("office transport must be separate")
+	}
+	target, _ := url.Parse("http://panel.test")
+	proxy := runtimeReverseProxy(target, "/dsh/office-test", "panel.test", "")
+	transport, ok := proxy.Transport.(runtimeProxyTransport)
+	if !ok || transport.normal != runtimeTransport || transport.office != runtimeOfficeTransport {
+		t.Fatalf("unexpected default transport: %#v", proxy.Transport)
+	}
+}
+
+func TestRuntimeOfficeProxyRouting(t *testing.T) {
+	for _, path := range []string{
+		"/api/officeToPdf/render",
+		"/api/status",
+		"/api/officeToPdf/render/",
+		"/api/officeToPdf/render/child",
+		"/api/officeToPdf/renderOther",
+		"/api/officetopdf/render",
+		"/api/officeToPdf/status",
+	} {
+		t.Run(path, func(t *testing.T) {
+			const body = "document payload"
+			const query = "file=report%20one.docx&mode=pdf&mode=preview"
+			var calls atomic.Int32
+			upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				calls.Add(1)
+				data, err := io.ReadAll(r.Body)
+				if err != nil || string(data) != body || r.Method != http.MethodPost {
+					t.Errorf("upstream method/body = %s %q, error %v", r.Method, data, err)
+				}
+				if r.URL.Path != path || r.URL.RawQuery != query {
+					t.Errorf("upstream URL = %s", r.URL)
+				}
+				if r.Host != "panel.test" || r.Header.Get("X-Forwarded-Prefix") != "/dsh/office-test" || r.Header.Get("Cookie") != "runtime=secret" {
+					t.Errorf("upstream host/headers = %s %v", r.Host, r.Header)
+				}
+				time.Sleep(100 * time.Millisecond)
+				w.Header().Set("Content-Type", "application/pdf")
+				_, _ = io.WriteString(w, "rendered PDF")
+			}))
+			defer upstream.Close()
+			proxy := officeTestProxy(t, upstream.URL, 500*time.Millisecond)
+			req := httptest.NewRequest(http.MethodPost, "/dsh/office-test"+path+"?"+query+"&token=removed", strings.NewReader(body))
+			req.Header.Set("Cookie", "panel=private")
+			originalURL := req.URL.String()
+			w := httptest.NewRecorder()
+			proxy.ServeHTTP(w, req)
+			want := http.StatusBadGateway
+			if path == "/api/officeToPdf/render" {
+				want = http.StatusOK
+				if w.Body.String() != "rendered PDF" {
+					t.Errorf("response body = %q", w.Body.String())
+				}
+			}
+			if w.Code != want {
+				t.Errorf("status = %d, want %d: %s", w.Code, want, w.Body.String())
+			}
+			if req.URL.String() != originalURL || req.Header.Get("Cookie") != "panel=private" {
+				t.Error("proxy mutated incoming URL or cookies")
+			}
+			upstream.Close()
+			if got := calls.Load(); got != 1 {
+				t.Errorf("mutating request sent %d times, want exactly once", got)
+			}
+		})
+	}
+}
+
+func TestRuntimeOfficeProxyFiniteTimeoutAndCancellation(t *testing.T) {
+	for _, name := range []string{"header timeout", "caller cancellation"} {
+		t.Run(name, func(t *testing.T) {
+			started := make(chan struct{}, 2)
+			canceled := make(chan struct{}, 2)
+			var calls atomic.Int32
+			upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				calls.Add(1)
+				_, _ = io.Copy(io.Discard, r.Body)
+				started <- struct{}{}
+				select {
+				case <-r.Context().Done():
+					canceled <- struct{}{}
+				case <-time.After(2 * time.Second):
+				}
+			}))
+			defer upstream.Close()
+			officeTimeout := 100 * time.Millisecond
+			if name == "caller cancellation" {
+				officeTimeout = 5 * time.Second
+			}
+			proxy := officeTestProxy(t, upstream.URL, officeTimeout)
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+			req := httptest.NewRequest(http.MethodPost, "/dsh/office-test/api/officeToPdf/render?mode=pdf", strings.NewReader("document")).WithContext(ctx)
+			w := httptest.NewRecorder()
+			done := make(chan struct{})
+			go func() {
+				proxy.ServeHTTP(w, req)
+				close(done)
+			}()
+			select {
+			case <-started:
+			case <-time.After(time.Second):
+				t.Fatal("request never reached upstream")
+			}
+			if name == "caller cancellation" {
+				cancel()
+			}
+			select {
+			case <-done:
+			case <-time.After(500 * time.Millisecond):
+				t.Fatal("proxy did not promptly finish")
+			}
+			if w.Code != http.StatusBadGateway {
+				t.Errorf("status = %d, want 502", w.Code)
+			}
+			select {
+			case <-canceled:
+			case <-time.After(500 * time.Millisecond):
+				t.Fatal("upstream context was not canceled")
+			}
+			upstream.Close()
+			if got := calls.Load(); got != 1 {
+				t.Errorf("mutating request sent %d times, want exactly once", got)
+			}
+		})
+	}
+}