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100 lines
2.7 KiB
100 lines
2.7 KiB
2 years ago
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package thumb
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import (
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"bytes"
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"context"
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"fmt"
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model "github.com/cloudreve/Cloudreve/v3/models"
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"github.com/cloudreve/Cloudreve/v3/pkg/util"
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"github.com/gofrs/uuid"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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)
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func init() {
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RegisterGenerator(&LibreOfficeGenerator{})
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}
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type LibreOfficeGenerator struct {
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exts []string
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lastRawExts string
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}
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func (l *LibreOfficeGenerator) Generate(ctx context.Context, file io.Reader, src string, name string, options map[string]string) (*Result, error) {
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sofficeOpts := model.GetSettingByNames("thumb_libreoffice_path", "thumb_libreoffice_exts", "thumb_encode_method", "temp_path")
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if l.lastRawExts != sofficeOpts["thumb_libreoffice_exts"] {
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l.exts = strings.Split(sofficeOpts["thumb_libreoffice_exts"], ",")
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}
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if !util.IsInExtensionList(l.exts, name) {
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return nil, fmt.Errorf("unsupported document format: %w", ErrPassThrough)
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}
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tempOutputPath := filepath.Join(
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util.RelativePath(sofficeOpts["temp_path"]),
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"thumb",
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fmt.Sprintf("soffice_%s", uuid.Must(uuid.NewV4()).String()),
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)
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tempInputPath := src
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if tempInputPath == "" {
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// If not local policy files, download to temp folder
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tempInputPath = filepath.Join(
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util.RelativePath(sofficeOpts["temp_path"]),
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"thumb",
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fmt.Sprintf("soffice_%s%s", uuid.Must(uuid.NewV4()).String(), filepath.Ext(name)),
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)
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// Due to limitations of ffmpeg, we need to write the input file to disk first
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tempInputFile, err := util.CreatNestedFile(tempInputPath)
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if err != nil {
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return nil, fmt.Errorf("failed to create temp file: %w", err)
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}
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defer os.Remove(tempInputPath)
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defer tempInputFile.Close()
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if _, err = io.Copy(tempInputFile, file); err != nil {
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return nil, fmt.Errorf("failed to write input file: %w", err)
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}
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tempInputFile.Close()
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}
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// Convert the document to an image
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cmd := exec.CommandContext(ctx, sofficeOpts["thumb_libreoffice_path"], "--headless",
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"-nologo", "--nofirststartwizard", "--invisible", "--norestore", "--convert-to",
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sofficeOpts["thumb_encode_method"], "--outdir", tempOutputPath, tempInputPath)
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// Redirect IO
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var stdErr bytes.Buffer
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cmd.Stdin = file
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cmd.Stderr = &stdErr
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if err := cmd.Run(); err != nil {
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util.Log().Warning("Failed to invoke LibreOffice: %s", stdErr.String())
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return nil, fmt.Errorf("failed to invoke LibreOffice: %w", err)
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}
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return &Result{
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Path: filepath.Join(
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tempOutputPath,
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strings.TrimSuffix(filepath.Base(tempInputPath), filepath.Ext(tempInputPath))+"."+sofficeOpts["thumb_encode_method"],
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),
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Continue: true,
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Cleanup: []func(){func() { _ = os.RemoveAll(tempOutputPath) }},
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}, nil
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}
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func (l *LibreOfficeGenerator) Priority() int {
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return 50
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}
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func (l *LibreOfficeGenerator) EnableFlag() string {
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return "thumb_libreoffice_enabled"
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}
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