Align Go ingestion boundaries with Python (#16647)

Moves doc_id blob resolution into Parser, tightens chunker/tokenizer to
Python output_format semantics, updates extractor list handling, and
fixes real-template integration tests.

internal/handler/components_testpkg/components_handler_test.go

@@ -0,0 +1,330 @@
+//
+//  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+
+// Phase 4 of plan port-rag-flow-pipeline-to-go.md — integration
+// tests for GET /api/v1/components.
+//
+// The tests import the agent and ingestion component packages via
+// blank imports so their init() functions register every factory
+// into runtime.DefaultRegistry. The tests then assert that the
+// HTTP handler projects that registry into the expected
+// JSON-shaped response.
+//
+// Counters are derived from runtime.DefaultRegistry.Names() /
+// NamesByCategory() at test time rather than hardcoded constants —
+// the registry is the source of truth, so any future registration
+// change just moves the expected values with it.
+//
+// This file lives in its own subpackage (components_testpkg) so
+// its test binary does not co-compile with the rest of the
+// internal/handler tests, whose build is currently broken on the
+// agent-go-port branch (pre-existing
+// `interface{}` vs `string` mismatch in chat_test.go /
+// searchbot_test.go). When the upstream build is fixed this
+// package can be folded back into the main handler test binary.
+package handler_test
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"sort"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+
+	_ "ragflow/internal/agent/component" // registers agent components
+	"ragflow/internal/agent/runtime"
+	"ragflow/internal/handler"
+	_ "ragflow/internal/ingestion/component"         // registers ingestion main components
+	_ "ragflow/internal/ingestion/component/chunker" // registers 4 chunker variants
+	"ragflow/internal/service"
+)
+
+func init() {
+	gin.SetMode(gin.TestMode)
+}
+
+// newComponentsTestRig mounts a Gin engine with the
+// /api/v1/components route registered against a fresh
+// ComponentsService (which reads runtime.DefaultRegistry).
+func newComponentsTestRig(t *testing.T) *gin.Engine {
+	t.Helper()
+	h := handler.NewComponentsHandler(service.NewComponentsService())
+	eng := gin.New()
+	v1 := eng.Group("/api/v1")
+	v1.GET("/components", h.Get)
+	return eng
+}
+
+// doRequest issues a GET against the test rig and returns the
+// response recorder.
+func doRequest(t *testing.T, eng *gin.Engine, path string) *httptest.ResponseRecorder {
+	t.Helper()
+	req := httptest.NewRequest(http.MethodGet, path, nil)
+	w := httptest.NewRecorder()
+	eng.ServeHTTP(w, req)
+	return w
+}
+
+// decodeEnvelope parses the standard {code, message, data} response
+// envelope used by every handler in this codebase.
+func decodeEnvelope(t *testing.T, body []byte) (code int, message string, data []service.ComponentDescriptor) {
+	t.Helper()
+	var env struct {
+		Code    int                           `json:"code"`
+		Message string                        `json:"message"`
+		Data    []service.ComponentDescriptor `json:"data"`
+	}
+	if err := json.Unmarshal(body, &env); err != nil {
+		t.Fatalf("decode envelope: %v; body=%s", err, string(body))
+	}
+	return env.Code, env.Message, env.Data
+}
+
+// TestComponentsHandler_NoFilter verifies that GET /api/v1/components
+// (no filter) returns every registered component, across all
+// categories. The total must equal runtime.DefaultRegistry.Names().
+func TestComponentsHandler_NoFilter(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components")
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200; body=%s", w.Code, w.Body.String())
+	}
+
+	gotCode, msg, data := decodeEnvelope(t, w.Body.Bytes())
+	if gotCode != 0 {
+		t.Errorf("envelope code = %d, want 0; message=%s", gotCode, msg)
+	}
+	if msg != "success" {
+		t.Errorf("envelope message = %q, want %q", msg, "success")
+	}
+
+	wantTotal := len(runtime.DefaultRegistry.Names())
+	if len(data) != wantTotal {
+		t.Errorf("got %d components, want %d (== Names())", len(data), wantTotal)
+	}
+
+	// Spot-check that the default registry includes agent and
+	// ingestion components when no filter is applied.
+	seen := map[string]bool{}
+	for _, d := range data {
+		seen[d.Category] = true
+	}
+	for _, cat := range []string{"agent", "ingestion"} {
+		if !seen[cat] {
+			t.Errorf("expected category %q in unfiltered response; got categories %v", cat, seen)
+		}
+	}
+}
+
+// TestComponentsHandler_FilterIngestion verifies the
+// ?category=ingestion filter returns the 8 ingestion components
+// (Extractor, File, Parser, Tokenizer + 4 chunker variants). Names
+// must be sorted ascending (plan §4 task 1 stable output).
+func TestComponentsHandler_FilterIngestion(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components?category=ingestion")
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200; body=%s", w.Code, w.Body.String())
+	}
+	_, _, data := decodeEnvelope(t, w.Body.Bytes())
+
+	wantNames := []string{
+		"extractor", "file", "grouptitlechunker", "hierarchytitlechunker",
+		"parser", "titlechunker", "tokenchunker", "tokenizer",
+	}
+	assertNameSet(t, "ingestion", data, wantNames)
+
+	for _, d := range data {
+		if d.Category != "ingestion" {
+			t.Errorf("filtered component %q has category %q, want %q", d.Name, d.Category, "ingestion")
+		}
+	}
+}
+
+// TestComponentsHandler_FilterMultiple verifies comma-separated
+// category values work. The shared category may currently be empty,
+// so ?category=ingestion,shared must still return the ingestion set.
+func TestComponentsHandler_FilterMultiple(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components?category=ingestion,shared")
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200; body=%s", w.Code, w.Body.String())
+	}
+	_, _, data := decodeEnvelope(t, w.Body.Bytes())
+
+	wantNames := []string{
+		"extractor", "file", "grouptitlechunker", "hierarchytitlechunker",
+		"parser", "titlechunker", "tokenchunker", "tokenizer",
+	}
+	assertNameSet(t, "ingestion,shared", data, wantNames)
+}
+
+// TestComponentsHandler_FilterAgent verifies the
+// ?category=agent filter returns every agent component. The count
+// is derived from NamesByCategory(CategoryAgent) so any future
+// registration change just moves the value.
+func TestComponentsHandler_FilterAgent(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components?category=agent")
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200; body=%s", w.Code, w.Body.String())
+	}
+	_, _, data := decodeEnvelope(t, w.Body.Bytes())
+
+	wantNames := runtime.DefaultRegistry.NamesByCategory(runtime.CategoryAgent)
+	if len(wantNames) == 0 {
+		t.Fatal("no agent components registered; cannot run this test")
+	}
+	assertNameSet(t, "agent", data, wantNames)
+	for _, d := range data {
+		if d.Category != "agent" {
+			t.Errorf("agent-filtered component %q has category %q", d.Name, d.Category)
+		}
+	}
+}
+
+// TestComponentsHandler_InvalidCategory verifies an unknown category
+// yields HTTP 400 with the standard error envelope. The message
+// must mention the offending token.
+func TestComponentsHandler_InvalidCategory(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components?category=foo")
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("status = %d, want 400; body=%s", w.Code, w.Body.String())
+	}
+	var env struct {
+		Code    int    `json:"code"`
+		Message string `json:"message"`
+	}
+	if err := json.Unmarshal(w.Body.Bytes(), &env); err != nil {
+		t.Fatalf("decode: %v; body=%s", err, w.Body.String())
+	}
+	if env.Code != 400 {
+		t.Errorf("envelope code = %d, want 400", env.Code)
+	}
+	if env.Message == "" {
+		t.Errorf("envelope message is empty; body=%s", w.Body.String())
+	}
+}
+
+// TestComponentsHandler_ComponentShape verifies every descriptor
+// has a non-empty name, a non-empty category from the known set,
+// and non-nil inputs / outputs maps (the service normalises nil
+// to empty maps so the JSON payload never has null fields).
+func TestComponentsHandler_ComponentShape(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components")
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200; body=%s", w.Code, w.Body.String())
+	}
+	_, _, data := decodeEnvelope(t, w.Body.Bytes())
+
+	allowed := map[string]bool{"agent": true, "ingestion": true, "shared": true}
+	for _, d := range data {
+		if d.Name == "" {
+			t.Errorf("descriptor has empty name: %+v", d)
+		}
+		if d.Category == "" {
+			t.Errorf("descriptor %q has empty category", d.Name)
+		}
+		if !allowed[d.Category] {
+			t.Errorf("descriptor %q has unknown category %q", d.Name, d.Category)
+		}
+		if d.Inputs == nil {
+			t.Errorf("descriptor %q has nil inputs; service must normalise to empty map", d.Name)
+		}
+		if d.Outputs == nil {
+			t.Errorf("descriptor %q has nil outputs; service must normalise to empty map", d.Name)
+		}
+	}
+}
+
+// TestComponentsHandler_CaseInsensitive verifies the
+// category filter accepts mixed case (plan §4 task 1 spec:
+// "case-insensitive"). The response must match the all-lowercase
+// variant.
+func TestComponentsHandler_CaseInsensitive(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components?category=INGESTION")
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200; body=%s", w.Code, w.Body.String())
+	}
+	_, _, data := decodeEnvelope(t, w.Body.Bytes())
+	wantNames := []string{
+		"extractor", "file", "grouptitlechunker", "hierarchytitlechunker",
+		"parser", "titlechunker", "tokenchunker", "tokenizer",
+	}
+	assertNameSet(t, "INGESTION (case-folded)", data, wantNames)
+}
+
+// TestComponentsHandler_EmptyCategory treats the bare
+// ?category= (no value) as a no-op filter — same payload as the
+// unfiltered endpoint. Whitespace-only values are dropped.
+func TestComponentsHandler_EmptyCategory(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components?category=")
+	if w.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200; body=%s", w.Code, w.Body.String())
+	}
+	_, _, data := decodeEnvelope(t, w.Body.Bytes())
+	if len(data) != len(runtime.DefaultRegistry.Names()) {
+		t.Errorf("empty category filter returned %d, want %d (== Names())", len(data), len(runtime.DefaultRegistry.Names()))
+	}
+}
+
+// TestComponentsHandler_RouteMounted verifies the route is
+// actually mounted at /api/v1/components. (Catches an accidental
+// router wiring regression even when no other test fires.)
+func TestComponentsHandler_RouteMounted(t *testing.T) {
+	eng := newComponentsTestRig(t)
+	w := doRequest(t, eng, "/api/v1/components")
+	if w.Code == http.StatusNotFound {
+		t.Fatalf("route not mounted; got 404; body=%s", w.Body.String())
+	}
+}
+
+// assertNameSet checks that the descriptors returned by the
+// handler contain exactly the names in want (set comparison;
+// ignores ordering — the handler also sorts by name, but the
+// comparison is order-independent to make test failures easier
+// to read).
+func assertNameSet(t *testing.T, label string, got []service.ComponentDescriptor, want []string) {
+	t.Helper()
+	gotNames := make([]string, 0, len(got))
+	for _, d := range got {
+		gotNames = append(gotNames, d.Name)
+	}
+	sort.Strings(gotNames)
+	wantSorted := append([]string(nil), want...)
+	sort.Strings(wantSorted)
+
+	if len(gotNames) != len(wantSorted) {
+		t.Errorf("%s: got %d names (%v), want %d (%v)", label, len(gotNames), gotNames, len(wantSorted), wantSorted)
+		return
+	}
+	for i := range wantSorted {
+		if gotNames[i] != wantSorted[i] {
+			t.Errorf("%s: name[%d] = %q, want %q (full got=%v want=%v)", label, i, gotNames[i], wantSorted[i], gotNames, wantSorted)
+		}
+	}
+}