Convert PDF to PNG

backend/.gitignore

@@ -1,2 +1,6 @@
 alba
 *~
+*.pdf
+*.md
+*.png
+

backend/main.go

@@ -22,9 +22,9 @@ var funcmap = template.FuncMap{
 }
 
 func convertPDFToPNG(filename string) error {
-	out, err := exec.Command("pandoc", pandoc_args...).CombinedOutput()
+	out, err := exec.Command("pdftoppm", filename, "./data/screen", "-png").CombinedOutput()
 	if string(out) != "" {
-		return fmt.Errorf("pandoc: %s", string(out))
+		return fmt.Errorf("pdftoppm: %s", string(out))
 	}
 	if err != nil {
 		return err
@@ -33,7 +33,7 @@ func convertPDFToPNG(filename string) error {
 }
 
 func serveScreen(res http.ResponseWriter, req *http.Request) {
-	tpl, err := tplutil.LoadTextTemplate("screen.tpl.md", funcmap)
+	tpl, err := tplutil.LoadTextTemplate("./data/screen.tpl.md", funcmap)
 	if err != nil {
 		panic(err)
 	}
@@ -55,8 +55,14 @@ func serveScreen(res http.ResponseWriter, req *http.Request) {
 		panic(err)
 	}
 
+	log.Println("Converting pdf to png.")
+	err = convertPDFToPNG("./data/screen.pdf")
+	if err != nil {
+		panic(err)
+	}
+
 	log.Println("Serving screen.png...")
-	http.ServeFile(res, req, "./data/screen.png")
+	http.ServeFile(res, req, "./data/screen-1.png")
 }
 
 func main() {