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The fetcher accepts image/svg+xml; internal/magic detects SVG. orig of an SVG at the orig size is the SVG unchanged, cached, with a Content-Security-Policy allowing only its styles and data: images; at another size, ErrSVGNotOriginalSize (400). Any other format renders it at the least size covering the output, at most 8192 on a side, so it stays sharp. Rendering refuses an SVG with a side over 8192 times the other (ErrSVGTooThin, 415), and the orig size of one above 8192 on a side (ErrSVGTooLargeForOrigSize, 400). The cache reads up to 1024 first bytes to find a file's format. Tests pinning the SVG refusal now expect SVG. Render time and memory are unbounded: P1 in TODO.md until the owner decides on #68. Model: opus-5-5
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
package imgcache
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import (
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"testing"
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"sneak.berlin/go/pixa/internal/imagerequest"
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)
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// testSVG is an SVG with a comment before its root element, so that its
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// first magic.MinMagicBytes bytes do not show its format.
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const testSVG = `<!-- a drawing --><svg xmlns="http://www.w3.org/2000/svg" ` +
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`width="4" height="4"/>`
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// TestSourceAndVariant_ReadSVG checks that a cached SVG source is read as
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// SVG, and a cached SVG variant (orig of an SVG source) as image/svg+xml.
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func TestSourceAndVariant_ReadSVG(t *testing.T) {
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t.Parallel()
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cache, _ := newEvictionTestCache(t, 1<<30)
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storeEvictionTestSource(t, cache, testHostCDN, "/drawing.svg", []byte(testSVG))
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reader, _, format, err := cache.Source(t.Context(),
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imagerequest.Source{Host: testHostCDN, Path: "/drawing.svg"})
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t.Logf("Source() format = %q, error = %v", format, err)
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if err != nil || format != imagerequest.FormatSVG {
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t.Errorf("Source() = format %q, error %v; want %q", format, err,
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imagerequest.FormatSVG)
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}
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if reader != nil {
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_ = reader.Close()
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}
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key := imagerequest.VariantKey("aabbccdd3001")
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err = cache.variants.Write(string(key), []byte(testSVG))
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if err != nil {
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t.Fatalf("storing the variant file: %v", err)
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}
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variant, err := cache.Variant(key)
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t.Logf("Variant() content type = %q, error = %v", variant.ContentType, err)
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if err != nil || variant.ContentType != "image/svg+xml" {
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t.Errorf("Variant() = content type %q, error %v; want image/svg+xml",
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variant.ContentType, err)
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}
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if variant.Content != nil {
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_ = variant.Content.Close()
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}
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}
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