fix canelation

converter/converter.go

@@ -17,15 +17,17 @@ import (
 
 // html to pdf converter structure for
 type Converter struct {
-	chromePath string
+	chromePath  string
-	ctx        context.Context
+	ctx         context.Context
-	cancel     context.CancelFunc
+	cancel      context.CancelFunc
-	progress   func(progress int)
+	allocCancel context.CancelFunc
+	progress    func(progress int)
 }
 
 // NewConverter starts a new converter instance with a chrome headless shell executable
 func NewConverter(chromePath string) (*Converter, error) {
 	var err error
+
 	c := &Converter{chromePath: chromePath}
 	chromePath, err = c.getChromePath()
 	if err != nil {
@@ -39,9 +41,11 @@ func NewConverter(chromePath string) (*Converter, error) {
 		chromedp.DisableGPU,
 	)
 
+	opts = append(opts, platformOptions())
+
 	var allocCtx context.Context
 	allocCtx, c.cancel = chromedp.NewExecAllocator(context.Background(), opts...)
-	c.ctx, c.cancel = chromedp.NewContext(allocCtx)
+	c.ctx, c.allocCancel = chromedp.NewContext(allocCtx)
 	return c, nil
 }
 
@@ -78,11 +82,11 @@ func (c *Converter) Convert(files ...models.File) error {
 
 		htmlURL.WriteString(filepath.ToSlash(absPath))
 
-		c.ctx, c.cancel = context.WithTimeout(c.ctx, 60*time.Second)
+		ctx, cancel := context.WithTimeout(c.ctx, 60*time.Second)
-		defer c.cancel()
+		defer cancel()
 
 		var pdfData []byte
-		err = chromedp.Run(c.ctx,
+		err = chromedp.Run(ctx,
 			chromedp.Navigate(htmlURL.String()),
 			chromedp.WaitReady("body", chromedp.ByQuery),
 			chromedp.ActionFunc(func(ctx context.Context) error {
@@ -98,18 +102,28 @@ func (c *Converter) Convert(files ...models.File) error {
 				return nil
 			}),
 		)
+
 		if err != nil {
+			c.cancel()
 			return err
 		}
 
 		// Save PDF to file
 		if err := os.WriteFile(f.Output, pdfData, 0644); err != nil {
+			c.cancel()
 			return err
 		}
 	}
+	c.cancel()
 	return nil
 }
 
+func (c *Converter) Close() {
+	if c.cancel != nil {
+		c.cancel()
+	}
+}
+
 // getChromePath checks for system Chrome, else falls back to bundled headless shell
 func (c *Converter) getChromePath() (string, error) {
 

converter/hideOthers.go

@@ -0,0 +1,10 @@
+//go:build !windows
+
+package converter
+
+import "github.com/chromedp/chromedp"
+
+func platformOptions() chromedp.ExecAllocatorOption {
+	// Returns a no-op option for Mac/Linux
+	return chromedp.NoSandbox
+}

converter/hideWindows.go

@@ -0,0 +1,20 @@
+//go:build windows
+
+package converter
+
+import (
+	"os/exec"
+	"syscall"
+
+	"github.com/chromedp/chromedp"
+)
+
+func platformOptions() chromedp.ExecAllocatorOption {
+	return chromedp.ModifyCmdFunc(func(cmd *exec.Cmd) {
+		if cmd.SysProcAttr == nil {
+			cmd.SysProcAttr = &syscall.SysProcAttr{}
+		}
+		cmd.SysProcAttr.HideWindow = true
+		cmd.SysProcAttr.CreationFlags = 0x08000000 // CREATE_NO_WINDOW
+	})
+}

html2pdf_test.go

@@ -42,7 +42,7 @@ func TestConvertFiles(t *testing.T) {
 		})
 	}
 
-	c, err := converter.NewConverter("./assets")
+	c, err := converter.NewConverter("assets/chrome-headless-shell/win64")
 	if err != nil {
 		t.Fatal(err)
 	}