z2: HTTP report query aliases and Gemtext Content-Type

Accept Category, Metric, and OutputFormat as alternate query keys
alongside category, metric, output-format. Serve Gemtext reports
with text/gemini; assert Content-Type in daemon tests.

Builds on y2 daemon GET /report reusing ParseReportQuery and
WriteReports.

Made-with: Cursor

4 files changed, 71 insertions, 4 deletions

diff --git a/internal/daemon/daemon.go b/internal/daemon/daemon.go
index 4e2402f..a4b1a3e 100644
--- a/internal/daemon/daemon.go
+++ b/internal/daemon/daemon.go
@@ -101,6 +101,8 @@ func reportContentType(f goprecords.OutputFormat) string {
 	switch f {
 	case goprecords.FormatMarkdown:
 		return "text/markdown; charset=utf-8"
+	case goprecords.FormatGemtext:
+		return "text/gemini; charset=utf-8"
 	default:
 		return "text/plain; charset=utf-8"
 	}
diff --git a/internal/daemon/daemon_test.go b/internal/daemon/daemon_test.go
index 38878fa..b140c9e 100644
--- a/internal/daemon/daemon_test.go
+++ b/internal/daemon/daemon_test.go
@@ -54,6 +54,9 @@ func TestReport(t *testing.T) {
 	if res.StatusCode != http.StatusOK {
 		t.Fatalf("status %d", res.StatusCode)
 	}
+	if ct := res.Header.Get("Content-Type"); ct != "text/plain; charset=utf-8" {
+		t.Fatalf("Content-Type %q", ct)
+	}
 	b, err := io.ReadAll(res.Body)
 	if err != nil {
 		t.Fatal(err)
@@ -63,6 +66,45 @@ func TestReport(t *testing.T) {
 	}
 }
 
+func TestReportQueryAliases(t *testing.T) {
+	fixtures := filepath.Join("..", "..", "fixtures")
+	srv := httptest.NewServer(Handler(fixtures))
+	defer srv.Close()
+	res, err := http.Get(srv.URL + "/report?Category=Host&Metric=Uptime&limit=2&OutputFormat=Markdown")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer res.Body.Close()
+	if res.StatusCode != http.StatusOK {
+		t.Fatalf("status %d", res.StatusCode)
+	}
+	if ct := res.Header.Get("Content-Type"); ct != "text/markdown; charset=utf-8" {
+		t.Fatalf("Content-Type %q", ct)
+	}
+	b, _ := io.ReadAll(res.Body)
+	body := string(b)
+	if !strings.Contains(body, "# Top") || !strings.Contains(body, "```") {
+		t.Fatalf("expected markdown heading and fence, got %q", b)
+	}
+}
+
+func TestReportGemtextContentType(t *testing.T) {
+	fixtures := filepath.Join("..", "..", "fixtures")
+	srv := httptest.NewServer(Handler(fixtures))
+	defer srv.Close()
+	res, err := http.Get(srv.URL + "/report?output-format=Gemtext&limit=2")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer res.Body.Close()
+	if res.StatusCode != http.StatusOK {
+		t.Fatalf("status %d", res.StatusCode)
+	}
+	if ct := res.Header.Get("Content-Type"); ct != "text/gemini; charset=utf-8" {
+		t.Fatalf("Content-Type %q", ct)
+	}
+}
+
 func TestReportBadQuery(t *testing.T) {
 	srv := httptest.NewServer(Handler(t.TempDir()))
 	defer srv.Close()
diff --git a/internal/goprecords/report.go b/internal/goprecords/report.go
index 939f0e9..b0403e7 100644
--- a/internal/goprecords/report.go
+++ b/internal/goprecords/report.go
@@ -72,9 +72,10 @@ func (rf *ReportFlags) Parse() (ReportConfig, error) {
 
 // ParseReportQuery builds a ReportConfig from URL query parameters using the
 // same names and defaults as RegisterReportFlags (category, metric, limit,
-// output-format, all, include-kernel, stats-order).
+// output-format, all, include-kernel, stats-order). It also accepts Category,
+// Metric, and OutputFormat as alternate keys (same values as the CLI).
 func ParseReportQuery(q url.Values) (ReportConfig, error) {
-	catStr := q.Get("category")
+	catStr := firstQuery(q, "category", "Category")
 	if catStr == "" {
 		catStr = "Host"
 	}
@@ -82,7 +83,7 @@ func ParseReportQuery(q url.Values) (ReportConfig, error) {
 	if err != nil {
 		return ReportConfig{}, err
 	}
-	metStr := q.Get("metric")
+	metStr := firstQuery(q, "metric", "Metric")
 	if metStr == "" {
 		metStr = "Uptime"
 	}
@@ -98,7 +99,7 @@ func ParseReportQuery(q url.Values) (ReportConfig, error) {
 		}
 		limit = uint(v)
 	}
-	outStr := q.Get("output-format")
+	outStr := firstQuery(q, "output-format", "OutputFormat")
 	if outStr == "" {
 		outStr = "Plaintext"
 	}
@@ -131,6 +132,15 @@ func ParseReportQuery(q url.Values) (ReportConfig, error) {
 	}, nil
 }
 
+func firstQuery(q url.Values, keys ...string) string {
+	for _, k := range keys {
+		if v := q.Get(k); v != "" {
+			return v
+		}
+	}
+	return ""
+}
+
 func parseQueryBool(s string) (bool, error) {
 	switch strings.ToLower(strings.TrimSpace(s)) {
 	case "true", "1", "yes":
diff --git a/internal/goprecords/report_test.go b/internal/goprecords/report_test.go
index c068ce9..d6b884d 100644
--- a/internal/goprecords/report_test.go
+++ b/internal/goprecords/report_test.go
@@ -346,6 +346,19 @@ func TestParseReportQuery(t *testing.T) {
 	if err == nil {
 		t.Fatal("expected error")
 	}
+
+	q = url.Values{
+		"Category":     []string{"KernelName"},
+		"Metric":       []string{"Score"},
+		"OutputFormat": []string{"Gemtext"},
+	}
+	cfg, err = ParseReportQuery(q)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cfg.Category != CategoryKernelName || cfg.Metric != MetricScore || cfg.OutputFormat != FormatGemtext {
+		t.Fatalf("PascalCase keys: %+v", cfg)
+	}
 }
 
 func hostName(i int) string {