working

main.go

@@ -1,13 +1,45 @@
 package main
 
 import (
+	"bytes"
 	"fmt"
 	"github.com/anaskhan96/soup"
+	"github.com/signintech/gopdf"
+	"image"
+	"io"
+	"net/http"
 	"os"
 )
 
+func fetchImage(imgLink string) []byte {
+	req, e := http.NewRequest("GET", imgLink, nil)
+	if e != nil {
+		fmt.Println(e)
+		os.Exit(1)
+	}
+	req.Header.Set("Referer", "http://www.webtoons.com")
+
+	response, err := http.DefaultClient.Do(req)
+	if err != nil {
+		panic(err)
+	}
+	defer func(Body io.ReadCloser) {
+		err := Body.Close()
+		if err != nil {
+			panic(err)
+		}
+	}(response.Body)
+
+	buff := new(bytes.Buffer)
+	_, err = buff.ReadFrom(response.Body)
+	if err != nil {
+		panic(err)
+	}
+	return buff.Bytes()
+}
+
 func main() {
-	resp, err := soup.Get("https://www.webtoons.com/en/thriller/bastard/ep-0/viewer?title_no=485&episode_no=1")
+	resp, err := soup.Get("https://www.webtoons.com/en/romance/down-to-earth/s2-episode-169/viewer?title_no=1817&episode_no=169")
 	if err != nil {
 		fmt.Println(fmt.Sprintf("Error fetching page: %v", err))
 		os.Exit(1)
@@ -18,5 +50,39 @@ func main() {
 	for _, img := range imgs {
 		imgLinks = append(imgLinks, img.Attrs()["data-url"])
 	}
-	println(imgLinks[0])
+	println(fmt.Sprintf("Found %d images", len(imgLinks)))
+
+	pdf := gopdf.GoPdf{}
+	pdf.Start(gopdf.Config{Unit: gopdf.UnitPT, PageSize: *gopdf.PageSizeA4})
+	for _, imgLink := range imgLinks {
+		fmt.Println(imgLink)
+		img := fetchImage(imgLink)
+		holder, err := gopdf.ImageHolderByBytes(img)
+		if err != nil {
+			panic(err)
+		}
+
+		d, _, err := image.DecodeConfig(bytes.NewReader(img))
+		if err != nil {
+			panic(err)
+		}
+
+		// gopdf assumes dpi 128 https://github.com/signintech/gopdf/issues/168
+		// W and H are in points, 1 point = 1/72 inch
+		// convert pixels (Width and Height) to ifrom nches, then to points
+		// subtract 1 to account for small margins
+		pdf.AddPageWithOption(gopdf.PageOption{PageSize: &gopdf.Rect{
+			W: float64(d.Width)*72/128 - 1,
+			H: float64(d.Height)*72/128 - 1,
+		}})
+		err = pdf.ImageByHolder(holder, 0, 0, nil)
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	err = pdf.WritePdf("out.pdf")
+	if err != nil {
+		panic(err)
+	}
 }