[UP-478] Pdf sanitization example

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/unidoc/globalsign-dss v0.0.0-20220330092912-b69d85b63736
 	github.com/unidoc/pkcs7 v0.1.1-0.20220329190817-dd59b9eba14c
 	github.com/unidoc/unichart v0.1.0
-	github.com/unidoc/unipdf/v3 v3.46.0
+	github.com/unidoc/unipdf/v3 v3.48.0
 	github.com/wcharczuk/go-chart/v2 v2.1.0
 	go.opencensus.io v0.24.0 // indirect
 	golang.org/x/crypto v0.0.0-20220722155217-630584e8d5aa

go.sum

@@ -403,8 +403,8 @@ github.com/unidoc/timestamp v0.0.0-20200412005513-91597fd3793a h1:RLtvUhe4DsUDl6
 github.com/unidoc/timestamp v0.0.0-20200412005513-91597fd3793a/go.mod h1:j+qMWZVpZFTvDey3zxUkSgPJZEX33tDgU/QIA0IzCUw=
 github.com/unidoc/unichart v0.1.0 h1:GoJ/rxSoOYZsqlG3yOJpKkwgfsIQgb9hHX7bILZHcCg=
 github.com/unidoc/unichart v0.1.0/go.mod h1:9sJXeqxIIsU2D07tmhpDMoND0mBFRGfKBJnXZMsJnzk=
-github.com/unidoc/unipdf/v3 v3.46.0 h1:FjYaPgHPt2Guk7KeRsFnxbR9Ftp0qZsVaif0+lu8/f0=
-github.com/unidoc/unipdf/v3 v3.46.0/go.mod h1:g42g9gaGCT2hLoNK+r/RZdNVnvhF1X6qx6wpTKJwg2E=
+github.com/unidoc/unipdf/v3 v3.48.0 h1:aI/7HAvZApdpT5zJ7GlCbaNwrqhM9R1oRbNQOVrjsYI=
+github.com/unidoc/unipdf/v3 v3.48.0/go.mod h1:g42g9gaGCT2hLoNK+r/RZdNVnvhF1X6qx6wpTKJwg2E=
 github.com/unidoc/unitype v0.2.1 h1:x0jMn7pB/tNrjEVjy3Ukpxo++HOBQaTCXcTYFA6BH3w=
 github.com/unidoc/unitype v0.2.1/go.mod h1:mafyug7zYmDOusqa7G0dJV45qp4b6TDAN+pHN7ZUIBU=
 github.com/wcharczuk/go-chart/v2 v2.1.0 h1:tY2slqVQ6bN+yHSnDYwZebLQFkphK4WNrVwnt7CJZ2I=

sanitize/pdf_sanitize_document.go

@@ -0,0 +1,83 @@
+/*
+ * This example demonstrates the usage of Sanitizer package to sanitize document.
+ *
+ * Run as: go run pdf_sanitize_document.go <input.pdf> <output.pdf>
+ */
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"github.com/unidoc/unipdf/v3/common/license"
+	"github.com/unidoc/unipdf/v3/model"
+	"github.com/unidoc/unipdf/v3/sanitize"
+)
+
+func init() {
+	// Make sure to load your metered License API key prior to using the library.
+	// If you need a key, you can sign up and create a free one at https://cloud.unidoc.io
+	err := license.SetMeteredKey(os.Getenv(`UNIDOC_LICENSE_API_KEY`))
+	if err != nil {
+		panic(err)
+	}
+}
+
+func main() {
+	args := os.Args
+	if len(args) < 3 {
+		fmt.Printf("Usage: pdf_sanitize_document.go <INPUT_PDF_PATH> <OUTPUT_PDF_PATH>\n", os.Args[0])
+		return
+	}
+	inputPath := args[1]
+	outputPath := args[2]
+
+	// Initialize starting time.
+	start := time.Now()
+	pdfReader, f, err := model.NewPdfReaderFromFile(inputPath, nil)
+	if err != nil {
+		log.Fatalf("Failed to create reader: %v", err)
+	}
+	defer f.Close()
+
+	pdfWriter, err := pdfReader.ToWriter(nil)
+	if err != nil {
+		log.Fatalf("Failed to get writer object: %v", err)
+	}
+
+	// Define sanitization options and set writer's optimizer
+	opts := sanitize.SanitizationOpts{
+		JavaScript:  true,
+		URI:         true,
+		GoToR:       true,
+		GoTo:        true,
+		RenditionJS: true,
+		OpenAction:  true,
+		Launch:      true,
+	}
+	pdfWriter.SetOptimizer(sanitize.New(opts))
+
+	// Write to file.
+	pdfWriter.WriteToFile(outputPath)
+
+	// Measure processing time.
+	duration := float64(time.Since(start)) / float64(time.Millisecond)
+
+	inputFileInfo, err := os.Stat(inputPath)
+	if err != nil {
+		fmt.Printf("Failed to get inputFile info %v", err)
+	}
+
+	outputFileInfo, err := os.Stat(outputPath)
+	if err != nil {
+		fmt.Printf("Failed to get outputFile info %v", err)
+	}
+
+	// Print information.
+	fmt.Printf("Input file size %d bytes\n", inputFileInfo.Size())
+	fmt.Printf("Output file size %d bytest\n", outputFileInfo.Size())
+	fmt.Printf("Processing time %.2f ms", duration)
+
+}