img optimizations
This commit is contained in:
Alexander Wang
parent
b5f8a0223e
commit
c40dc7ec34
2 changed files with 92 additions and 6 deletions
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@ -23,6 +23,8 @@ import (
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"oss.terrastruct.com/util-go/xmain"
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)
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var imgCache sync.Map
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const maxImageSize int64 = 1 << 25 // 33_554_432
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var imageRegex = regexp.MustCompile(`<image href="([^"]+)"`)
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@ -55,12 +57,17 @@ func bundle(ctx context.Context, ms *xmain.State, svg []byte, isRemote bool) (_
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return runWorkers(ctx, ms, svg, imgs, isRemote)
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}
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// filterImageElements finds all image elements in imgs that are eligible
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// for bundling in the current context.
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// filterImageElements finds all unique image elements in imgs that are
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// eligible for bundling in the current context.
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func filterImageElements(imgs [][][]byte, isRemote bool) [][][]byte {
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unq := make(map[string]struct{})
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imgs2 := imgs[:0]
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for _, img := range imgs {
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href := string(img[1])
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if _, ok := unq[href]; ok {
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continue
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}
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unq[href] = struct{}{}
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// Skip already bundled images.
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if strings.HasPrefix(href, "data:") {
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@ -104,7 +111,7 @@ func runWorkers(ctx context.Context, ms *xmain.State, svg []byte, imgs [][][]byt
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<-sema
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}()
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bundledImage, err := worker(ctx, img[1], isRemote)
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bundledImage, err := worker(ctx, &imgCache, img[1], isRemote)
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if err != nil {
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ms.Log.Error.Printf("failed to bundle %s: %v", img[1], err)
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errhrefsMu.Lock()
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@ -138,12 +145,15 @@ func runWorkers(ctx context.Context, ms *xmain.State, svg []byte, imgs [][][]byt
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}
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return svg, nil
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}
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svg = bytes.Replace(svg, repl.from, repl.to, 1)
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svg = bytes.Replace(svg, repl.from, repl.to, -1)
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}
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}
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}
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func worker(ctx context.Context, href []byte, isRemote bool) ([]byte, error) {
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func worker(ctx context.Context, cache *sync.Map, href []byte, isRemote bool) ([]byte, error) {
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if hit, ok := cache.Load(string(href)); ok {
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return hit.([]byte), nil
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}
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var buf []byte
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var mimeType string
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var err error
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@ -161,7 +171,10 @@ func worker(ctx context.Context, href []byte, isRemote bool) ([]byte, error) {
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}
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mimeType = strings.Replace(mimeType, "text/xml", "image/svg+xml", 1)
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b64 := base64.StdEncoding.EncodeToString(buf)
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return []byte(fmt.Sprintf(`<image href="data:%s;base64,%s"`, mimeType, b64)), nil
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out := []byte(fmt.Sprintf(`<image href="data:%s;base64,%s"`, mimeType, b64))
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cache.Store(string(href), out)
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return out, nil
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}
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var httpClient = &http.Client{}
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@ -10,8 +10,10 @@ import (
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"os"
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"path/filepath"
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"strings"
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"sync"
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"testing"
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tassert "github.com/stretchr/testify/assert"
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"oss.terrastruct.com/util-go/cmdlog"
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"oss.terrastruct.com/util-go/xos"
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@ -49,6 +51,7 @@ func TestRegex(t *testing.T) {
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}
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func TestInlineRemote(t *testing.T) {
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imgCache = sync.Map{}
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ctx := context.Background()
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svgURL := "https://icons.terrastruct.com/essentials/004-picture.svg"
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pngURL := "https://cdn4.iconfinder.com/data/icons/smart-phones-technologies/512/android-phone.png"
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@ -119,6 +122,7 @@ width="328" height="587" viewBox="-100 -131 328 587"><style type="text/css">
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t.Fatal("no png image inserted")
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}
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imgCache = sync.Map{}
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// Test almost too large response
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httpClient.Transport = roundTripFunc(func(req *http.Request) *http.Response {
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respRecorder := httptest.NewRecorder()
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@ -133,6 +137,7 @@ width="328" height="587" viewBox="-100 -131 328 587"><style type="text/css">
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t.Fatal(err)
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}
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imgCache = sync.Map{}
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// Test too large response
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httpClient.Transport = roundTripFunc(func(req *http.Request) *http.Response {
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respRecorder := httptest.NewRecorder()
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@ -147,6 +152,7 @@ width="328" height="587" viewBox="-100 -131 328 587"><style type="text/css">
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t.Fatal("expected error")
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}
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imgCache = sync.Map{}
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// Test error response
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httpClient.Transport = roundTripFunc(func(req *http.Request) *http.Response {
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respRecorder := httptest.NewRecorder()
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@ -160,6 +166,7 @@ width="328" height="587" viewBox="-100 -131 328 587"><style type="text/css">
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}
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func TestInlineLocal(t *testing.T) {
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imgCache = sync.Map{}
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ctx := context.Background()
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svgURL, err := filepath.Abs("./test_svg.svg")
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if err != nil {
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@ -221,3 +228,69 @@ width="328" height="587" viewBox="-100 -131 328 587"><style type="text/css">
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t.Fatal("no png image inserted")
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}
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}
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// TestDuplicateURL ensures that we don't fetch the same image twice
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func TestDuplicateURL(t *testing.T) {
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imgCache = sync.Map{}
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ctx := context.Background()
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url1 := "https://icons.terrastruct.com/essentials/004-picture.svg"
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url2 := "https://icons.terrastruct.com/essentials/004-picture.svg"
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sampleSVG := fmt.Sprintf(`<?xml version="1.0" encoding="utf-8"?>
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<svg
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id="d2-svg"
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style="background: white;"
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xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
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width="328" height="587" viewBox="-100 -131 328 587"><style type="text/css">
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<![CDATA[
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.shape {
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shape-rendering: geometricPrecision;
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stroke-linejoin: round;
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}
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.connection {
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stroke-linecap: round;
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stroke-linejoin: round;
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}
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]]>
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</style><g id="a"><g class="shape" ><image href="%s" x="0" y="0" width="128" height="128" style="fill:#FFFFFF;stroke:#0D32B2;opacity:1.000000;stroke-width:2;" /></g><text class="text-bold" x="64.000000" y="-15.000000" style="text-anchor:middle;font-size:16px;fill:#0A0F25">a</text></g><g id="b"><g class="shape" ><image href="%s" x="0" y="228" width="128" height="128" style="fill:#FFFFFF;stroke:#0D32B2;opacity:1.000000;stroke-width:2;" /></g><text class="text-bold" x="64.000000" y="213.000000" style="text-anchor:middle;font-size:16px;fill:#0A0F25">b</text></g><g id="(a -> b)[0]"><marker id="mk-3990223579" markerWidth="10.000000" markerHeight="12.000000" refX="7.000000" refY="6.000000" viewBox="0.000000 0.000000 10.000000 12.000000" orient="auto" markerUnits="userSpaceOnUse"> <polygon class="connection" fill="#0D32B2" stroke-width="2" points="0.000000,0.000000 10.000000,6.000000 0.000000,12.000000" /> </marker><path d="M 64.000000 130.000000 C 64.000000 168.000000 64.000000 188.000000 64.000000 224.000000" class="connection" style="fill:none;stroke:#0D32B2;opacity:1.000000;stroke-width:2;" marker-end="url(#mk-3990223579)" /></g><style type="text/css"><![CDATA[
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.text-bold {
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font-family: "font-bold";
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}
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@font-face {
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font-family: font-bold;
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src: url("REMOVED");
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}]]></style></svg>
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`, url1, url2)
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ms := &xmain.State{
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Name: "test",
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Stdin: os.Stdin,
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Stdout: os.Stdout,
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Stderr: os.Stderr,
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Env: xos.NewEnv(os.Environ()),
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}
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ms.Log = cmdlog.NewTB(ms.Env, t)
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count := 0
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httpClient.Transport = roundTripFunc(func(req *http.Request) *http.Response {
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count++
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respRecorder := httptest.NewRecorder()
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respRecorder.WriteString(`<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>\r\n<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->\r\n<svg version=\"1.1\" id=\"Capa_1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" x=\"0px\" y=\"0px\"\r\n\t viewBox=\"0 0 58 58\" style=\"enable-background:new 0 0 58 58;\" xml:space=\"preserve\">\r\n<rect x=\"1\" y=\"7\" style=\"fill:#C3E1ED;stroke:#E7ECED;stroke-width:2;stroke-miterlimit:10;\" width=\"56\" height=\"44\"/>\r\n<circle style=\"fill:#ED8A19;\" cx=\"16\" cy=\"17.569\" r=\"6.569\"/>\r\n<polygon style=\"fill:#1A9172;\" points=\"56,36.111 55,35 43,24 32.5,35.5 37.983,40.983 42,45 56,45 \"/>\r\n<polygon style=\"fill:#1A9172;\" points=\"2,49 26,49 21.983,44.983 11.017,34.017 2,41.956 \"/>\r\n<rect x=\"2\" y=\"45\" style=\"fill:#6B5B4B;\" width=\"54\" height=\"5\"/>\r\n<polygon style=\"fill:#25AE88;\" points=\"37.983,40.983 27.017,30.017 10,45 42,45 \"/>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n<g>\r\n</g>\r\n</svg>`)
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respRecorder.WriteHeader(200)
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return respRecorder.Result()
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})
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out, err := BundleRemote(ctx, ms, []byte(sampleSVG))
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if err != nil {
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t.Fatal(err)
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}
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tassert.Equal(t, 1, count)
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if strings.Contains(string(out), url1) {
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t.Fatal("links still exist")
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}
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tassert.Equal(t, 2, strings.Count(string(out), "image/svg+xml"))
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}
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