Withhold unsafe recipe sources from idea job results

Cook from what I have and Quick dinners ideas returned the grounded
recipe's raw source_url and site_name, so a link carrying a token in its
query or userinfo, or a stored name taken from its host, reached the
client in the job response (BASE-01).

dinners.SourceOf is now the one way a fetched recipe's source reaches a
client: the dinner detail and both idea result builders use it. An
idea's source_url and site_name are null when they could leak a secret,
and a source that does not parse fails the job instead of being shown.

Task: c15ed4b5-25ae-43c6-8d36-f4a6dd51e5af

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/dinners/detail.go

@@ -147,11 +147,11 @@ func readRecipe(ctx context.Context, q *db.Queries, recipeID string, d *Detail)
 		return fmt.Errorf("recipe %s: %w", recipeID, err)
 	}
 	if !IsManualRecipe(rec.SourceUrl) {
-		site, err := pageSiteName(rec.SiteName, rec.SourceUrl)
+		src, err := SourceOf(rec.SiteName, rec.SourceUrl)
 		if err != nil {
 			return err
 		}
-		d.Source = &Source{SiteName: site, URL: safeSourceURL(rec.SourceUrl)}
+		d.Source = &src
 	}
 	ings, err := q.ListRecipeIngredients(ctx, recipeID)
 	if err != nil {
@@ -182,6 +182,19 @@ func readRecipe(ctx context.Context, q *db.Queries, recipeID string, d *Detail)
 	return nil
 }
 
+// SourceOf is the Source of a recipe fetched from sourceURL whose stored
+// site name is siteName: the name only when the page gave it (see
+// pageSiteName) and the link only when it is free of secrets (see
+// safeSourceURL). It is the one way a fetched recipe's source reaches a
+// client.
+func SourceOf(siteName sql.NullString, sourceURL string) (Source, error) {
+	site, err := pageSiteName(siteName, sourceURL)
+	if err != nil {
+		return Source{}, err
+	}
+	return Source{SiteName: site, URL: safeSourceURL(sourceURL)}, nil
+}
+
 // pageSiteName is the stored site name of a recipe fetched from sourceURL
 // when it is one the page gave, else nil. A page that names no site is
 // stored under recipes.HostSiteName of the URL it was served from: the

internal/ideas/ideas.go

@@ -11,6 +11,7 @@ package ideas
 
 import (
 	"context"
+	"database/sql"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -197,11 +198,13 @@ type Idea struct {
 	// Difficulty is easy, medium or hard.
 	Difficulty string `json:"difficulty"`
 	// Quick says whether the idea is a Quick dinner (see IsQuick).
-	Quick     bool   `json:"quick"`
+	Quick    bool   `json:"quick"`
-	RecipeID  string `json:"recipe_id"`
+	RecipeID string `json:"recipe_id"`
-	PhotoURL  string `json:"photo_url"`
+	PhotoURL string `json:"photo_url"`
-	SourceURL string `json:"source_url"`
+	// SourceURL and SiteName are the grounded recipe's source as
-	SiteName  string `json:"site_name"`
+	// dinners.SourceOf gives it: each null when it could leak a secret.
+	SourceURL *string `json:"source_url"`
+	SiteName  *string `json:"site_name"`
 }
 
 // Result is the KindFromIngredients result, published as the job goes:
@@ -312,9 +315,9 @@ func (s *Service) fill(ctx context.Context, p FromIngredientsJob, publish func(R
 	for i, idea := range out.Ideas {
 		reqs[i] = recipes.GroundRequest{DishName: idea.Name, Query: idea.SearchQuery}
 	}
-	err = keepGrounded(ctx, s.grounder, reqs, skills.IdeasKept, &res.Ideas, &res.Dropped, func(i int, gr recipes.Grounded) (Idea, bool) {
+	err = keepGrounded(ctx, s.grounder, reqs, skills.IdeasKept, &res.Ideas, &res.Dropped, func(i int, gr recipes.Grounded) (Idea, bool, error) {
-		idea := ideaOf(out.Ideas[i], gr)
+		idea, err := ideaOf(out.Ideas[i], gr)
-		return idea, !p.QuickOnly || idea.Quick
+		return idea, !p.QuickOnly || idea.Quick, err
 	}, func() error { return publish(res) })
 	if err != nil {
 		return res, err
@@ -333,9 +336,9 @@ func (s *Service) fill(ctx context.Context, p FromIngredientsJob, publish func(R
 // order (an idea that grounds sooner than one before it is shown first,
 // and the earlier one is put back in its place when it grounds) and
 // publish is called. An idea no recipe grounds, or that keep refuses,
-// counts in *dropped. Any other grounding failure, or publish failing, is
+// counts in *dropped. Any other grounding failure, or keep or publish
-// returned (see ground).
+// failing, is returned (see ground).
-func keepGrounded[T any](ctx context.Context, g *recipes.Grounder, reqs []recipes.GroundRequest, want int, shown *[]T, dropped *int, keep func(i int, gr recipes.Grounded) (T, bool), publish func() error) error {
+func keepGrounded[T any](ctx context.Context, g *recipes.Grounder, reqs []recipes.GroundRequest, want int, shown *[]T, dropped *int, keep func(i int, gr recipes.Grounded) (T, bool, error), publish func() error) error {
 	// order[k] is the index in reqs of (*shown)[k], so each idea is put in
 	// its place in reqs' order as it grounds.
 	var order []int
@@ -348,7 +351,10 @@ func keepGrounded[T any](ctx context.Context, g *recipes.Grounder, reqs []recipe
 				*dropped++
 				return nil
 			}
-			idea, ok := keep(first+i, *gr)
+			idea, ok, err := keep(first+i, *gr)
+			if err != nil {
+				return err
+			}
 			if !ok {
 				*dropped++
 				return nil
@@ -418,7 +424,11 @@ func withoutIdeas[R shownResult[R]](stored json.RawMessage) (json.RawMessage, er
 }
 
 // ideaOf is idea as grounded by gr.
-func ideaOf(idea skills.Idea, gr recipes.Grounded) Idea {
+func ideaOf(idea skills.Idea, gr recipes.Grounded) (Idea, error) {
+	src, err := sourceOf(gr)
+	if err != nil {
+		return Idea{}, err
+	}
 	return Idea{
 		Name:         idea.Name,
 		Uses:         idea.Uses,
@@ -430,9 +440,20 @@ func ideaOf(idea skills.Idea, gr recipes.Grounded) Idea {
 		Quick:        IsQuick(gr.Method, gr.MinutesTotal),
 		RecipeID:     gr.RecipeID,
 		PhotoURL:     dinners.PhotoURL(gr.PhotoID),
-		SourceURL:    gr.SourceURL,
+		SourceURL:    src.URL,
-		SiteName:     gr.SiteName,
+		SiteName:     src.SiteName,
+	}, nil
+}
+
+// sourceOf is gr's recipe source as a client may see it (see
+// dinners.SourceOf): a grounded recipe's site name is stored only when
+// not empty.
+func sourceOf(gr recipes.Grounded) (dinners.Source, error) {
+	src, err := dinners.SourceOf(sql.NullString{String: gr.SiteName, Valid: gr.SiteName != ""}, gr.SourceURL)
+	if err != nil {
+		return dinners.Source{}, fmt.Errorf("ideas: recipe %s: %w", gr.RecipeID, err)
 	}
+	return src, nil
 }
 
 // QuickJob is the KindQuick payload: the kind of Quick dinner wanted,
@@ -478,8 +499,9 @@ type QuickIdea struct {
 	Difficulty string `json:"difficulty"`
 	RecipeID   string `json:"recipe_id"`
 	PhotoURL   string `json:"photo_url"`
-	SourceURL  string `json:"source_url"`
+	// SourceURL and SiteName are as in Idea.
-	SiteName   string `json:"site_name"`
+	SourceURL *string `json:"source_url"`
+	SiteName  *string `json:"site_name"`
 }
 
 // QuickResult is the KindQuick result, published as the job goes: its
@@ -564,8 +586,9 @@ func (s *Service) fillQuick(ctx context.Context, p QuickJob, publish func(QuickR
 	for i, idea := range out.Ideas {
 		reqs[i] = recipes.GroundRequest{DishName: idea.Name, Query: idea.SearchQuery}
 	}
-	err = keepGrounded(ctx, s.grounder, reqs, skills.QuickIdeasKept, &res.Ideas, &res.Dropped, func(i int, gr recipes.Grounded) (QuickIdea, bool) {
+	err = keepGrounded(ctx, s.grounder, reqs, skills.QuickIdeasKept, &res.Ideas, &res.Dropped, func(i int, gr recipes.Grounded) (QuickIdea, bool, error) {
-		return quickIdeaOf(out.Ideas[i], gr), OfQuickKind(p.Kind, gr.Method, gr.MinutesTotal)
+		idea, err := quickIdeaOf(out.Ideas[i], gr)
+		return idea, OfQuickKind(p.Kind, gr.Method, gr.MinutesTotal), err
 	}, func() error { return publish(res) })
 	if err != nil {
 		return res, err
@@ -578,7 +601,11 @@ func (s *Service) fillQuick(ctx context.Context, p QuickJob, publish func(QuickR
 }
 
 // quickIdeaOf is idea as grounded by gr.
-func quickIdeaOf(idea skills.QuickIdea, gr recipes.Grounded) QuickIdea {
+func quickIdeaOf(idea skills.QuickIdea, gr recipes.Grounded) (QuickIdea, error) {
+	src, err := sourceOf(gr)
+	if err != nil {
+		return QuickIdea{}, err
+	}
 	return QuickIdea{
 		Name:         idea.Name,
 		Method:       gr.Method,
@@ -586,9 +613,9 @@ func quickIdeaOf(idea skills.QuickIdea, gr recipes.Grounded) QuickIdea {
 		Difficulty:   gr.Difficulty,
 		RecipeID:     gr.RecipeID,
 		PhotoURL:     dinners.PhotoURL(gr.PhotoID),
-		SourceURL:    gr.SourceURL,
+		SourceURL:    src.URL,
-		SiteName:     gr.SiteName,
+		SiteName:     src.SiteName,
-	}
+	}, nil
 }
 
 // Origins of a dinner made from an idea (the dinners.origin column).

internal/ideas/quick_test.go

@@ -369,7 +369,7 @@ func TestStartQuickRunsTheJob(t *testing.T) {
 	if res.Stage != StageDone || res.Kind != skills.QuickCrockpot || !reflect.DeepEqual(res.Exclude, []string{"Beef Stew"}) || len(res.Ideas) != 1 {
 		t.Fatalf("result = %+v", res)
 	}
-	if got := res.Ideas[0]; got.Name != "Pulled Pork" || got.Method != "crockpot" || got.SiteName != "R Kitchen" {
+	if got := res.Ideas[0]; got.Name != "Pulled Pork" || got.Method != "crockpot" || got.SiteName == nil || *got.SiteName != "R Kitchen" {
 		t.Errorf("idea = %+v", got)
 	}
 }

internal/server/ideasource_test.go

@@ -0,0 +1,124 @@
+package server
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"reflect"
+	"strings"
+	"testing"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/ai/llm"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/recipes"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/recipes/recipestest"
+)
+
+// sourceCase is a recipe page an idea grounds in: its link and the site
+// name its page gives (empty for none, so the host is stored instead).
+type sourceCase struct {
+	dish, link, site string
+	// want is the idea's source_url and site_name; nil is null.
+	wantURL, wantSite any
+}
+
+const (
+	cleanSourceLink = "https://kitchen.example/recipes/chicken-curry"
+	queryToken      = "query-token-abc123"
+	queryHost       = "query-host-q1.example"
+	userinfoToken   = "user-token-def456"
+	userinfoHost    = "userinfo-host-u2.example"
+)
+
+// sourceCases are a clean link, credited by its page's name, and links
+// carrying a token in the query and the userinfo whose pages name no site,
+// so the stored name is the link's host.
+var sourceCases = []sourceCase{
+	{"Chicken Curry", cleanSourceLink, "Curry House", cleanSourceLink, "Curry House"},
+	{"Beef Stew", "https://" + queryHost + "/stew?access_token=" + queryToken, "", nil, nil},
+	{"Bean Chili", "https://" + userinfoToken + "@" + userinfoHost + "/chili", "", nil, nil},
+}
+
+// sourceSecrets are what no idea job response may contain.
+var sourceSecrets = []string{queryToken, "access_token", queryHost, userinfoToken, userinfoHost}
+
+// sourceFakes makes the search for each case's dish find its page and
+// scripts the normalize_recipe reply grounding it takes.
+func sourceFakes(t *testing.T, minutes int) (*llm.Fake, *llm.Fake, *recipestest.Search, *recipestest.Pages, *recipestest.Images) {
+	t.Helper()
+	model, normalize, search, pages, images := newQuickFakes()
+	for i, c := range sourceCases {
+		photo := fmt.Sprintf("https://img.example/%d.jpg", i)
+		search.Results[c.dish] = []recipes.Candidate{{URL: c.link}}
+		pages.Bodies[c.link] = recipestest.RecipePage(c.dish, c.site, photo, minutes)
+		images.JPEGs[photo] = recipestest.JPEG(t, 400, 320, uint8(i+1))
+		normalize.QueueGenerate(recipestest.NormalizedReply("stovetop", minutes))
+	}
+	return model, normalize, search, pages, images
+}
+
+// checkIdeaSources checks the finished job id: each idea shows its case's
+// safe source, and the response holds nothing of a token-bearing link.
+func checkIdeaSources(t *testing.T, h http.Handler, id string) {
+	t.Helper()
+	job := waitJob(t, h, id)
+	if job["status"] != "succeeded" {
+		t.Fatalf("GET job = %v", job)
+	}
+	rec, _ := callDinners(t, h, http.MethodGet, "/api/v1/jobs/"+id, "")
+	for _, secret := range sourceSecrets {
+		if strings.Contains(rec.Body.String(), secret) {
+			t.Errorf("job response contains %q: %s", secret, rec.Body)
+		}
+	}
+	list := job["result"].(map[string]any)["ideas"].([]any)
+	if len(list) != len(sourceCases) {
+		t.Fatalf("ideas = %v, want %d", list, len(sourceCases))
+	}
+	for i, c := range sourceCases {
+		idea := list[i].(map[string]any)
+		if idea["name"] != c.dish {
+			t.Fatalf("idea %d = %v, want %s", i, idea, c.dish)
+		}
+		for key, want := range map[string]any{"source_url": c.wantURL, "site_name": c.wantSite} {
+			got, ok := idea[key]
+			if !ok || !reflect.DeepEqual(got, want) {
+				t.Errorf("%s %s = %v (present %t), want %v", c.dish, key, got, ok, want)
+			}
+		}
+		if idea["recipe_id"] == "" || idea["photo_url"] == "" {
+			t.Errorf("idea %s = %v, want a recipe and photo", c.dish, idea)
+		}
+	}
+}
+
+// An ideas_from_ingredients job shows a clean link and its page's name,
+// and neither a token-bearing link nor a name taken from its host.
+func TestIdeasJobShowsOnlySafeSources(t *testing.T) {
+	t.Parallel()
+	model, normalize, search, pages, images := sourceFakes(t, 25)
+	list := make([]string, len(sourceCases))
+	for i, c := range sourceCases {
+		list[i] = fmt.Sprintf(`{"name":%q,"uses":["rice"],"missing":[],"est_minutes":25,"method":"stovetop","difficulty":"easy","search_query":%q}`, c.dish, c.dish)
+	}
+	js := `{"ideas":[` + strings.Join(list, ",") + `]}`
+	model.QueueGenerate(llm.GenerateResult{Response: llm.Response{Text: js, JSON: json.RawMessage(js)}})
+	h, _, _ := newIdeasRouter(t, model, normalize, search, pages, images, true)
+	checkIdeaSources(t, h, startIdeasJob(t, h))
+}
+
+// A quick_ideas job shows sources as an ideas_from_ingredients job does.
+func TestQuickJobShowsOnlySafeSources(t *testing.T) {
+	t.Parallel()
+	model, normalize, search, pages, images := sourceFakes(t, 25)
+	ideas := make([][3]any, len(sourceCases))
+	for i, c := range sourceCases {
+		ideas[i] = [3]any{c.dish, "stovetop", 20}
+	}
+	quickReply(model, ideas...)
+	h, _, _ := newIdeasRouter(t, model, normalize, search, pages, images, true)
+	rec, body := callDinners(t, h, http.MethodPost, quickPath, `{"kind": "under30", "exclude": []}`)
+	if rec.Code != http.StatusAccepted {
+		t.Fatalf("POST = %d: %s", rec.Code, rec.Body)
+	}
+	checkIdeaSources(t, h, body["jobId"].(string))
+}

web/src/ideas/CookFromPantryPage.test.tsx

@@ -33,7 +33,9 @@ function idea(name: string, summary: string, minutes: number | null = 30) {
 
 // The ideas of mock 1i.
 const CURRY = idea('Coconut chicken curry', 'Uses all 5 · missing: 1 lime')
-const BOWLS = idea('Garlic spinach rice bowls', 'Uses 4 of 5 · nothing missing', 25)
+// BOWLS's source is withheld, as the server sends one whose link could
+// carry a secret: the card shows all the same.
+const BOWLS = { ...idea('Garlic spinach rice bowls', 'Uses 4 of 5 · nothing missing', 25), source_url: null, site_name: null }
 const ONE_PAN = idea('One-pan chicken & rice', 'Uses 3 of 5 · missing: onion')
 
 type JobBody = { status: string; result: unknown; error: string | null }

web/src/ideas/QuickDinnersPage.test.tsx

@@ -30,7 +30,9 @@ function idea(name: string, method: string, minutes: number | null, difficulty:
 
 // The ideas of mock 1j, and more for later pages and the Crock pot tab.
 const ORZO = idea('Lemon garlic shrimp orzo', 'stovetop', 25, 'medium')
-const QUESADILLAS = idea('Chicken quesadillas', 'stovetop', 20, 'easy')
+// QUESADILLAS's source is withheld, as the server sends one whose link
+// could carry a secret: the card shows all the same.
+const QUESADILLAS = { ...idea('Chicken quesadillas', 'stovetop', 20, 'easy'), source_url: null, site_name: null }
 const BROCCOLI = idea('Beef & broccoli', 'stovetop', 30, 'easy')
 const GNOCCHI = idea('Pesto gnocchi & peas', 'stovetop', 15, 'easy')
 const CHILI = idea('Crock pot chili', 'crockpot', 360, 'easy')