88 lines
1.6 KiB
Go
88 lines
1.6 KiB
Go
package main
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import (
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"bytes"
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"embed"
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"image"
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"image/jpeg"
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"log"
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"math/rand"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"github.com/artyom/smartcrop"
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"github.com/edwvee/exiffix"
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"github.com/gofiber/fiber/v2"
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)
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//go:embed index.html
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var content embed.FS
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var imageDirectory = os.Getenv("IMAGE_DIRECTORY")
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func main() {
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app := fiber.New()
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app.Get("/", func(c *fiber.Ctx) error {
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body, _ := content.ReadFile("index.html")
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c.Type("html")
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return c.Send(body)
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})
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app.Get("/image", func(c *fiber.Ctx) error {
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photos, _ := filepath.Glob(filepath.Join(imageDirectory, "*.[jJ][pP][gG]"))
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photo := photos[rand.Intn(len(photos))]
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width, _ := strconv.Atoi(c.Query("width", "1280"))
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height, _ := strconv.Atoi(c.Query("height", "800"))
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var img image.Image
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if strings.ToLower(c.Query("crop")) == "true" {
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img = cropImage(photo, width, height)
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} else {
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img = loadImage(photo)
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}
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buf := new(bytes.Buffer)
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jpeg.Encode(buf, img, &jpeg.Options{Quality: 100})
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c.Type("jpg")
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return c.SendStream(buf, buf.Len())
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})
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app.Listen(":3000")
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}
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func loadImage(imgSrc string) image.Image {
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f, err := os.Open(imgSrc)
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if err != nil {
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log.Fatal(err)
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}
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defer f.Close()
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img, _, err := exiffix.Decode(f)
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if err != nil {
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log.Fatal(err)
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}
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return img
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}
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func cropImage(imgSrc string, width, height int) image.Image {
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img := loadImage(imgSrc)
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topCrop, err := smartcrop.Crop(img, width, height)
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if err != nil {
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log.Fatal(err)
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}
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type subImager interface {
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SubImage(image.Rectangle) image.Image
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}
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if si, ok := img.(subImager); ok {
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return si.SubImage(topCrop)
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}
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return nil
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}
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