mirror of
https://github.com/muun/recovery.git
synced 2025-07-08 08:32:22 -04:00
109 lines
2.5 KiB
Go
109 lines
2.5 KiB
Go
/*
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Copyright 2020 The pdfcpu Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package api
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import (
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"io"
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"os"
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"time"
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"github.com/pdfcpu/pdfcpu/pkg/log"
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"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
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"github.com/pkg/errors"
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)
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// Optimize reads a PDF stream from rs and writes the optimized PDF stream to w.
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func Optimize(rs io.ReadSeeker, w io.Writer, conf *pdfcpu.Configuration) error {
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if conf == nil {
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conf = pdfcpu.NewDefaultConfiguration()
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conf.Cmd = pdfcpu.OPTIMIZE
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}
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fromStart := time.Now()
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ctx, durRead, durVal, durOpt, err := readValidateAndOptimize(rs, conf, fromStart)
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if err != nil {
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return err
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}
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log.Stats.Printf("XRefTable:\n%s\n", ctx)
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fromWrite := time.Now()
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if err = WriteContext(ctx, w); err != nil {
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return err
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}
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durWrite := time.Since(fromWrite).Seconds()
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durTotal := time.Since(fromStart).Seconds()
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logOperationStats(ctx, "write", durRead, durVal, durOpt, durWrite, durTotal)
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// For Optimize only.
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if ctx.StatsFileName != "" {
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err = pdfcpu.AppendStatsFile(ctx)
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if err != nil {
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return errors.Wrap(err, "Write stats failed.")
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}
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}
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return nil
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}
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// OptimizeFile reads inFile and writes the optimized PDF to outFile.
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// If outFile is not provided then inFile gets overwritten
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// which leads to the same result as when inFile equals outFile.
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func OptimizeFile(inFile, outFile string, conf *pdfcpu.Configuration) (err error) {
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var f1, f2 *os.File
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if f1, err = os.Open(inFile); err != nil {
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return err
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}
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tmpFile := inFile + ".tmp"
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if outFile != "" && inFile != outFile {
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tmpFile = outFile
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log.CLI.Printf("writing %s...\n", outFile)
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} else {
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log.CLI.Printf("writing %s...\n", inFile)
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}
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if f2, err = os.Create(tmpFile); err != nil {
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return err
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}
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defer func() {
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if err != nil {
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f2.Close()
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f1.Close()
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os.Remove(tmpFile)
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return
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}
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if err = f2.Close(); err != nil {
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return
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}
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if err = f1.Close(); err != nil {
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return
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}
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if outFile == "" || inFile == outFile {
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if err = os.Rename(tmpFile, inFile); err != nil {
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return
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}
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}
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}()
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return Optimize(f1, f2, conf)
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}
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