adding pageRanges formField

internal/app/xhttp/option.go

@@ -48,6 +48,10 @@ func chromePrinterOptions(r resource.Resource, config conf.Config) (printer.Chro
 		if err != nil {
 			return printer.ChromePrinterOptions{}, err
 		}
+		pageRanges, err := r.StringArg(resource.PageRangesArgKey, "")
+		if err != nil {
+			return printer.ChromePrinterOptions{}, err
+		}
 		return printer.ChromePrinterOptions{
 			WaitTimeout:  waitTimeout,
 			WaitDelay:    waitDelay,
@@ -60,6 +64,7 @@ func chromePrinterOptions(r resource.Resource, config conf.Config) (printer.Chro
 			MarginLeft:   marginLeft,
 			MarginRight:  marginRight,
 			Landscape:    landscape,
+			PageRanges:   pageRanges,
 		}, nil
 	}
 	opts, err := resolver()
@@ -80,9 +85,14 @@ func officePrinterOptions(r resource.Resource, config conf.Config) (printer.Offi
 		if err != nil {
 			return printer.OfficePrinterOptions{}, err
 		}
+		pageRanges, err := r.StringArg(resource.PageRangesArgKey, "")
+		if err != nil {
+			return printer.OfficePrinterOptions{}, err
+		}
 		return printer.OfficePrinterOptions{
 			WaitTimeout: waitTimeout,
 			Landscape:   landscape,
+			PageRanges:  pageRanges,
 		}, nil
 	}
 	opts, err := resolver()

internal/app/xhttp/pkg/resource/arg.go

@@ -51,6 +51,9 @@ const (
 	// LandscapeArgKey is the key
 	// of the argument "landscape".
 	LandscapeArgKey ArgKey = "landscape"
+	// PageRangesArgKey is the key
+	// of the argument "pageRanges".
+	PageRangesArgKey ArgKey = "pageRanges"
 )
 
 /*
@@ -73,6 +76,7 @@ func ArgKeys() []ArgKey {
 		MarginLeftArgKey,
 		MarginRightArgKey,
 		LandscapeArgKey,
+		PageRangesArgKey,
 	}
 }
 

internal/pkg/printer/chrome.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"io/ioutil"
+	"strings"
 	"time"
 
 	"github.com/mafredri/cdp"
@@ -40,6 +41,7 @@ type ChromePrinterOptions struct {
 	MarginLeft   float64
 	MarginRight  float64
 	Landscape    bool
+	PageRanges   string
 }
 
 // DefaultChromePrinterOptions returns the default
@@ -58,6 +60,7 @@ func DefaultChromePrinterOptions(config conf.Config) ChromePrinterOptions {
 		MarginLeft:   1.0,
 		MarginRight:  1.0,
 		Landscape:    false,
+		PageRanges:   "",
 	}
 }
 
@@ -142,10 +145,7 @@ func (p chromePrinter) Print(destination string) error {
 		} else {
 			p.logger.DebugOp(op, "no wait delay to apply, moving on...")
 		}
-		// print the page to PDF.
+		printToPdfArgs := page.NewPrintToPDFArgs().
-		print, err := targetClient.Page.PrintToPDF(
-			ctx,
-			page.NewPrintToPDFArgs().
 			SetPaperWidth(p.opts.PaperWidth).
 			SetPaperHeight(p.opts.PaperHeight).
 			SetMarginTop(p.opts.MarginTop).
@@ -156,9 +156,24 @@ func (p chromePrinter) Print(destination string) error {
 			SetDisplayHeaderFooter(true).
 			SetHeaderTemplate(p.opts.HeaderHTML).
 			SetFooterTemplate(p.opts.FooterHTML).
-				SetPrintBackground(true),
+			SetPrintBackground(true)
+		if p.opts.PageRanges != "" {
+			printToPdfArgs.SetPageRanges(p.opts.PageRanges)
+		}
+		// print the page to PDF.
+		// TODO catch page range error?
+		print, err := targetClient.Page.PrintToPDF(
+			ctx,
+			printToPdfArgs,
 		)
 		if err != nil {
+			if strings.Contains(err.Error(), "Page range syntax error") {
+				return xerror.Invalid(
+					"",
+					fmt.Sprintf("'%s' is not a valid Google Chrome page ranges", p.opts.PageRanges),
+					err,
+				)
+			}
 			return err
 		}
 		if err := ioutil.WriteFile(destination, print.Data, 0644); err != nil {

internal/pkg/printer/office.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/phayes/freeport"
 	"github.com/thecodingmachine/gotenberg/internal/pkg/conf"
@@ -26,6 +27,7 @@ type officePrinter struct {
 type OfficePrinterOptions struct {
 	WaitTimeout float64
 	Landscape   bool
+	PageRanges  string
 }
 
 // DefaultOfficePrinterOptions returns the default
@@ -34,6 +36,7 @@ func DefaultOfficePrinterOptions(config conf.Config) OfficePrinterOptions {
 	return OfficePrinterOptions{
 		WaitTimeout: config.DefaultWaitTimeout(),
 		Landscape:   false,
+		PageRanges:  "",
 	}
 }
 
@@ -59,7 +62,7 @@ func (p officePrinter) Print(destination string) error {
 			baseFilename := xrand.Get()
 			tmpDest := fmt.Sprintf("%s/%d%s.pdf", dirPath, i, baseFilename)
 			p.logger.DebugfOp(op, "converting '%s' to PDF...", fpath)
-			if err := unoconv(ctx, p.logger, fpath, tmpDest, p.opts); err != nil {
+			if err := p.unoconv(ctx, fpath, tmpDest); err != nil {
 				return err
 			}
 			p.logger.DebugfOp(op, "'%s.pdf' created", baseFilename)
@@ -85,9 +88,12 @@ func (p officePrinter) Print(destination string) error {
 	return nil
 }
 
-func unoconv(ctx context.Context, logger xlog.Logger, fpath, destination string, opts OfficePrinterOptions) error {
+func (p officePrinter) unoconv(ctx context.Context, fpath, destination string) error {
 	const op string = "printer.unoconv"
 	resolver := func() error {
+		hasPageRanges := func() bool {
+			return p.opts.PageRanges != "" && len(p.fpaths) == 1
+		}
 		port, err := freeport.GetFreePort()
 		if err != nil {
 			return err
@@ -100,11 +106,24 @@ func unoconv(ctx context.Context, logger xlog.Logger, fpath, destination string,
 			"--format",
 			"pdf",
 		}
-		if opts.Landscape {
+		if p.opts.Landscape {
 			args = append(args, "--printer", "PaperOrientation=landscape")
 		}
+		if hasPageRanges() {
+			args = append(args, "--export", fmt.Sprintf("PageRange=%s", p.opts.PageRanges))
+		}
 		args = append(args, "--output", destination, fpath)
-		return xexec.Run(ctx, logger, "unoconv", args...)
+		if err := xexec.Run(ctx, p.logger, "unoconv", args...); err != nil {
+			if hasPageRanges() && strings.Contains(err.Error(), "exit status 5") {
+				return xerror.Invalid(
+					"",
+					fmt.Sprintf("'%s' is not a valid LibreOffice page ranges", p.opts.PageRanges),
+					err,
+				)
+			}
+			return err
+		}
+		return nil
 	}
 	if err := resolver(); err != nil {
 		return xerror.New(op, err)