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feat: add more PDF formats, drastically improve LibreOffice long-running instance management

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This commit is contained in:
Julien Neuhart
2022-02-07 18:28:58 +01:00
parent 3d855712ee
commit 24817d5707
34 changed files with 3883 additions and 2377 deletions
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55
pkg/modules/libreoffice/pdfengine/pdfengine.go
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@@ -2,75 +2,76 @@ package pdfengine
import (
"context"
"errors"
"fmt"
"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/unoconv"
"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/uno"
"go.uber.org/zap"
)
func init() {
gotenberg.MustRegisterModule(UnoconvPDFEngine{})
gotenberg.MustRegisterModule(UNO{})
}
// UnoconvPDFEngine abstracts the CLI tool unoconv and implements the
// gotenberg.PDFEngine interface.
type UnoconvPDFEngine struct {
unoconv unoconv.API
// UNO interacts with the UNO (Universal Network Objects) API and implements
// the gotenberg.PDFEngine interface.
type UNO struct {
unoAPI uno.API
}
// Descriptor returns a UnoconvPDFEngine's module descriptor.
func (UnoconvPDFEngine) Descriptor() gotenberg.ModuleDescriptor {
// Descriptor returns a UNO's module descriptor.
func (UNO) Descriptor() gotenberg.ModuleDescriptor {
return gotenberg.ModuleDescriptor{
ID: "unoconv-pdfengine",
New: func() gotenberg.Module { return new(UnoconvPDFEngine) },
ID: "uno-pdfengine",
New: func() gotenberg.Module { return new(UNO) },
}
}
// Provision sets the module properties.
func (engine *UnoconvPDFEngine) Provision(ctx *gotenberg.Context) error {
provider, err := ctx.Module(new(unoconv.Provider))
func (engine *UNO) Provision(ctx *gotenberg.Context) error {
provider, err := ctx.Module(new(uno.Provider))
if err != nil {
return fmt.Errorf("get unoconv provider: %w", err)
}
uno, err := provider.(unoconv.Provider).Unoconv()
unoAPI, err := provider.(uno.Provider).UNO()
if err != nil {
return fmt.Errorf("get unoconv API: %w", err)
}
engine.unoconv = uno
engine.unoAPI = unoAPI
return nil
}
// Merge is not available for this PDF engine.
func (engine UnoconvPDFEngine) Merge(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
func (engine UNO) Merge(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
return fmt.Errorf("merge PDFs with unoconv: %w", gotenberg.ErrPDFEngineMethodNotAvailable)
}
// Convert converts the given PDF to a specific PDF format. Currently, only the
// PDF/A-1 format is available. If another PDF format is requested, it returns
// a gotenberg.ErrPDFFormatNotAvailable error.
func (engine UnoconvPDFEngine) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
if format != gotenberg.FormatPDFA1a {
return fmt.Errorf("convert PDF to '%s' with unoconv: %w", format, gotenberg.ErrPDFFormatNotAvailable)
}
err := engine.unoconv.PDF(ctx, logger, inputPath, outputPath, unoconv.Options{
PDFArchive: true,
// PDF/A-1a, PDF/A-2b and PDF/A-3b formats are available. If another PDF format
// is requested, it returns a gotenberg.ErrPDFFormatNotAvailable error.
func (engine UNO) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
err := engine.unoAPI.PDF(ctx, logger, inputPath, outputPath, uno.Options{
PDFformat: format,
})
if err == nil {
return nil
}
if errors.Is(err, uno.ErrInvalidPDFformat) {
return fmt.Errorf("convert PDF to '%s' with unoconv: %w", format, gotenberg.ErrPDFFormatNotAvailable)
}
return fmt.Errorf("convert PDF to '%s' with unoconv: %w", format, err)
}
// Interface guards.
var (
_ gotenberg.Module = (*UnoconvPDFEngine)(nil)
_ gotenberg.Provisioner = (*UnoconvPDFEngine)(nil)
_ gotenberg.PDFEngine = (*UnoconvPDFEngine)(nil)
_ gotenberg.Module = (*UNO)(nil)
_ gotenberg.Provisioner = (*UNO)(nil)
_ gotenberg.PDFEngine = (*UNO)(nil)
)