One image request type instead of five (closes #307)

The new package internal/imagerequest holds the request type, its two parts Source and Transform, the Format and Fit types, the dimension and fit checks, the /v1/image/ path parsing and the variant key; it imports no other package of pixa. imgcache.ParsedURL, imgcache.ImageRequest, signature.Request, imageprocessor.Request, the second Size, format and fit types and the conversions between them are gone. The image processor takes a Transform only. encurl keeps a private struct with the token's short CBOR field names. VariantKey moves with the function that makes it. Tests follow the moved and renamed code; the tests of the removed conversions go with them. Model: opus-5-5
2026-10-21 14:41:07 +02:00
parent 385c0ca76f
commit 00d8ba26c5
68 changed files with 2217 additions and 1978 deletions
@@ -0,0 +1,142 @@
+package imagerequest
+
+import "testing"
+
+func TestCacheKey(t *testing.T) {
+	t.Parallel()
+
+	req1 := &Request{
+		Source: Source{Host: testHostCDN, Path: testPathCat, Query: ""},
+		Transform: Transform{
+			Size: Size{Width: 800, Height: 600}, Format: FormatWebP,
+			Quality: 85, FitMode: FitCover,
+		},
+	}
+
+	req2 := &Request{
+		Source: Source{Host: testHostCDN, Path: testPathCat, Query: ""},
+		Transform: Transform{
+			Size: Size{Width: 800, Height: 600}, Format: FormatWebP,
+			Quality: 85, FitMode: FitCover,
+		},
+	}
+
+	// Same request should produce same key
+	key1 := CacheKey(req1)
+	key2 := CacheKey(req2)
+
+	if key1 != key2 {
+		t.Errorf("CacheKey() not deterministic: %s vs %s", key1, key2)
+	}
+
+	// Key should be 64 hex chars
+	if len(string(key1)) != 64 {
+		t.Errorf("CacheKey() length = %d, want 64", len(string(key1)))
+	}
+
+	// Different size should produce different key
+	req3 := &Request{
+		Source: Source{Host: testHostCDN, Path: testPathCat, Query: ""},
+		Transform: Transform{
+			Size: Size{Width: 400, Height: 300}, Format: FormatWebP, // Different size
+			Quality: 85, FitMode: FitCover,
+		},
+	}
+
+	key3 := CacheKey(req3)
+	if key1 == key3 {
+		t.Error("CacheKey() produced same key for different sizes")
+	}
+
+	// Different format should produce different key
+	req4 := &Request{
+		Source: Source{Host: testHostCDN, Path: testPathCat, Query: ""},
+		Transform: Transform{
+			Size: Size{Width: 800, Height: 600}, Format: FormatPNG, // Different format
+			Quality: 85, FitMode: FitCover,
+		},
+	}
+
+	key4 := CacheKey(req4)
+	if key1 == key4 {
+		t.Error("CacheKey() produced same key for different formats")
+	}
+
+	// Different quality should produce different key
+	req5 := &Request{
+		Source: Source{Host: testHostCDN, Path: testPathCat, Query: ""},
+		Transform: Transform{
+			Size: Size{Width: 800, Height: 600}, Format: FormatWebP,
+			Quality: 50, FitMode: FitCover, // Different quality
+		},
+	}
+
+	key5 := CacheKey(req5)
+	if key1 == key5 {
+		t.Error("CacheKey() produced same key for different quality")
+	}
+}
+
+// TestCacheKey_ColonOrPercentInPathOrQuery checks that two different source
+// URLs whose path or query holds ":" or "%" get different keys.
+func TestCacheKey_ColonOrPercentInPathOrQuery(t *testing.T) {
+	t.Parallel()
+
+	cases := []struct {
+		name          string
+		path1, query1 string
+		path2, query2 string
+	}{
+		{
+			name:  "colon moved from path to query",
+			path1: "/a:b", query1: "",
+			path2: "/a", query2: "b:",
+		},
+		{
+			name:  "colon in path and its percent-encoding",
+			path1: "/a:b", query1: "",
+			path2: "/a%3Ab", query2: "",
+		},
+	}
+
+	for _, tt := range cases {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			key1 := CacheKey(&Request{
+				Source: Source{
+					Host:  testHostCDN,
+					Path:  tt.path1,
+					Query: tt.query1,
+				},
+				Transform: Transform{
+					Size:    Size{Width: 800, Height: 600},
+					Format:  FormatWebP,
+					Quality: 85,
+					FitMode: FitCover,
+				},
+			})
+			key2 := CacheKey(&Request{
+				Source: Source{
+					Host:  testHostCDN,
+					Path:  tt.path2,
+					Query: tt.query2,
+				},
+				Transform: Transform{
+					Size:    Size{Width: 800, Height: 600},
+					Format:  FormatWebP,
+					Quality: 85,
+					FitMode: FitCover,
+				},
+			})
+
+			t.Logf("CacheKey() of path %q query %q = %s", tt.path1, tt.query1, key1)
+			t.Logf("CacheKey() of path %q query %q = %s", tt.path2, tt.query2, key2)
+
+			if key1 == key2 {
+				t.Errorf("CacheKey() gave path %q query %q and path %q query %q "+
+					"the same key", tt.path1, tt.query1, tt.path2, tt.query2)
+			}
+		})
+	}
+}