github.com/cloudresty/pdf

PDF Reader

In a nutshell PDF Reader it is a simple Go library for reading PDF files which enables text exctraction being in the form of Plain Text or Formatted Text. The very first developer of this library it was https://github.com/rsc/pdf, being forked and improved by https://github.com/ledongthuc/pdf. Cloudresty has forked ledongthuc's library with the aim to maintain and improve it further.

  Features

• Get plain text content (without format)
• Get content (including all font and formatting information)

 

Install Read PDF Go library

go get -u github.com/cloudresty/pdf

 

Read PDF Go Library Examples

Go Read PDF - Plain Text

package main

import (
	"bytes"
	"fmt"

	"github.com/cloudresty/pdf"
)

//
// Main Function
//

func main() {

	pdf.DebugOn = true

	//
	// Read PDF File
	//

	pdfText, errReadPDF := readPDF("file.pdf")

	if errReadPDF != nil {
		panic(errReadPDF)
	}

	fmt.Println(pdfText)
	
	return

}

//
// Read PDF Function
//

func readPDF(path string) (string, error) {

	//
	// Open PDF File
	//

	f, r, errPDFOpen := pdf.Open(path)
	
    defer f.Close()

	if errPDFOpen != nil {
		return "", errPDFOpen
	}

	//
	// Extract Plain Text
	//

	var buf bytes.Buffer

    b, errGetPlainText := r.GetPlainText()

	if errGetPlainText != nil {
        return "", errGetPlainText
    }

	buf.ReadFrom(b)

	return buf.String(), nil

}

Go Read PDF - Formatted Text

//
// Read PDF Function (standalone)
//

func readPDF(path string) (string, error) {

	//
	// Open PDF File
	//

	f, r, errPDFOpen := pdf.Open(path)

	defer f.Close()

	if errPDFOpen != nil {
		return "", errPDFOpen
	}

	//
	// Page Count
	//
	
	totalPage := r.NumPage()

	//
	// Loop Through Pages
	//

	for pageIndex := 1; pageIndex <= totalPage; pageIndex++ {

		p := r.Page(pageIndex)

		if p.V.IsNull() {
			continue
		}

		//
		// Extract Formatted Text
		//

		var lastTextStyle pdf.Text
		texts := p.Content().Text

		for _, text := range texts {

			if isSameSentence(text, lastTextStyle) {

				lastTextStyle.S = lastTextStyle.S + text.S
		
			} else {

				fmt.Printf("Font: %s, Font-size: %f, x: %f, y: %f, content: %s \n", lastTextStyle.Font, lastTextStyle.FontSize, lastTextStyle.X, lastTextStyle.Y, lastTextStyle.S)
				lastTextStyle = text

			}

		}

	}

	return "", nil

}

Go Read PDF - Text Grouped by Rows

package main

import (
	"fmt"
	"os"

	"github.com/cloudresty/pdf"
)

//
// Main Function
//

func main() {

	//
	// Read Local PDF File
	//

	content, errReadPDF := readPDF(os.Args[1])

	if errReadPDF != nil {
		panic(errReadPDF)
	}

	fmt.Println(content)

	return

}

//
// Read PDF Function
//

func readPDF(path string) (string, error) {

	//
	// Open PDF File
	//

	f, r, errReadPDF := pdf.Open(path)

	defer func() {
		_ = f.Close()
	}()

	if errReadPDF != nil {
		return "", errReadPDF
	}

	//
	// Page Count
	//

	totalPage := r.NumPage()

	//
	// Loop Through Pages
	//

	for pageIndex := 1; pageIndex <= totalPage; pageIndex++ {

		p := r.Page(pageIndex)

		if p.V.IsNull() {
			continue
		}

		//
		// Get Rows
		//

		rows, _ := p.GetTextByRow()

		for _, row := range rows {

			println("Row: ", row.Position)

			for _, word := range row.Content {

				fmt.Println(word.S)

			}

		}

	}

	return "", nil
}