v3.0.0 (#18)

internal/app/api/merge.go

@@ -0,0 +1,57 @@
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/labstack/echo"
+	"github.com/thecodingmachine/gotenberg/internal/pkg/printer"
+	"github.com/thecodingmachine/gotenberg/internal/pkg/rand"
+)
+
+func merge(c echo.Context) error {
+	r, err := newResource(c)
+	if err != nil {
+		return err
+	}
+	defer r.removeAll()
+	fpaths, err := r.filePaths([]string{".pdf"})
+	if err != nil {
+		return err
+	}
+	baseFilename, err := rand.Get()
+	if err != nil {
+		return fmt.Errorf("getting result file name: %v", err)
+	}
+	filename := fmt.Sprintf("%s.pdf", baseFilename)
+	dest := fmt.Sprintf("%s/%s", r.dirPath, filename)
+	if r.webhookURL() == "" {
+		// if no webhook URL given, run merge
+		// and directly return the resulting PDF file
+		// or and error.
+		return printer.Merge(fpaths, dest)
+	}
+	// as a webhook URL has been given, we
+	// run the following lines in a goroutine so that
+	// it doesn't block.
+	go func() {
+		if err := printer.Merge(fpaths, dest); err != nil {
+			c.Logger().Errorf("%v", err)
+			return
+		}
+		f, err := os.Open(dest)
+		if err != nil {
+			c.Logger().Errorf("%v", err)
+			return
+		}
+		defer f.Close()
+		resp, err := http.Post(r.webhookURL(), "application/pdf", f)
+		if err != nil {
+			c.Logger().Errorf("%v", err)
+			return
+		}
+		defer resp.Body.Close()
+	}()
+	return nil
+}