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pdf.go
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pdf.go
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// Copyright © 2022 zc2638 <zc2638@qq.com>.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package apidoc
import (
"bytes"
"os"
"strings"
pdf "github.com/SebastiaanKlippert/go-wkhtmltopdf"
)
func SaveToPDF(data []byte, isGray bool) ([]byte, error) {
gen, err := pdf.NewPDFGenerator()
if err != nil {
return nil, err
}
gen.Dpi.Set(300)
gen.Grayscale.Set(isGray)
gen.AddPage(pdf.NewPageReader(bytes.NewReader(data)))
if err := gen.Create(); err != nil {
return nil, err
}
return gen.Bytes(), nil
}
func SaveToPDFFile(data []byte, isGray bool, to string) error {
pdfData, err := SaveToPDF(data, isGray)
if err != nil {
return err
}
to = strings.TrimSuffix(to, ".pdf") + ".pdf"
outFile, err := os.Create(to)
if err != nil {
return err
}
defer outFile.Close()
_, err = outFile.Write(pdfData)
return err
}