forked from sajari/docconv
/
pdf_text.go
133 lines (111 loc) · 2.96 KB
/
pdf_text.go
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package docconv
import (
"fmt"
"os/exec"
"strings"
"time"
)
// Meta data
type MetaResult struct {
meta map[string]string
err error
}
type BodyResult struct {
body string
err error
}
// Convert PDF
func ConvertPDFText(path string) (BodyResult, MetaResult, error) {
metaResult := MetaResult{meta: make(map[string]string)}
bodyResult := BodyResult{}
mr := make(chan MetaResult, 1)
go func() {
metaStr, err := exec.Command("pdfinfo", path).Output()
if err != nil {
metaResult.err = err
mr <- metaResult
return
}
// Parse meta output
for _, line := range strings.Split(string(metaStr), "\n") {
if parts := strings.SplitN(line, ":", 2); len(parts) > 1 {
metaResult.meta[strings.TrimSpace(parts[0])] = strings.TrimSpace(parts[1])
}
}
// Convert parsed meta
if x, ok := metaResult.meta["ModDate"]; ok {
if t, ok := pdfTimeLayouts.Parse(x); ok {
metaResult.meta["ModifiedDate"] = fmt.Sprintf("%d", t.Unix())
}
}
if x, ok := metaResult.meta["CreationDate"]; ok {
if t, ok := pdfTimeLayouts.Parse(x); ok {
metaResult.meta["CreatedDate"] = fmt.Sprintf("%d", t.Unix())
}
}
mr <- metaResult
}()
br := make(chan BodyResult, 1)
go func() {
body, err := exec.Command("pdftotext", "-q", "-layout", path, "-").Output()
if err != nil {
bodyResult.err = err
}
bodyResult.body = string(body)
br <- bodyResult
}()
return <-br, <-mr, nil
}
// Convert PDF
func ConvertPDFTextWithPage(path string, start, end int) (BodyResult, MetaResult, error) {
metaResult := MetaResult{meta: make(map[string]string)}
bodyResult := BodyResult{}
mr := make(chan MetaResult, 1)
go func() {
metaStr, err := exec.Command("pdfinfo", path).Output()
if err != nil {
metaResult.err = err
mr <- metaResult
return
}
// Parse meta output
for _, line := range strings.Split(string(metaStr), "\n") {
if parts := strings.SplitN(line, ":", 2); len(parts) > 1 {
metaResult.meta[strings.TrimSpace(parts[0])] = strings.TrimSpace(parts[1])
}
}
// Convert parsed meta
if x, ok := metaResult.meta["ModDate"]; ok {
if t, ok := pdfTimeLayouts.Parse(x); ok {
metaResult.meta["ModifiedDate"] = fmt.Sprintf("%d", t.Unix())
}
}
if x, ok := metaResult.meta["CreationDate"]; ok {
if t, ok := pdfTimeLayouts.Parse(x); ok {
metaResult.meta["CreatedDate"] = fmt.Sprintf("%d", t.Unix())
}
}
mr <- metaResult
}()
br := make(chan BodyResult, 1)
go func() {
body, err := exec.Command("pdftotext", "-q", "-layout", "-f", fmt.Sprintf("%d", start), "-l", fmt.Sprintf("%d", end), path, "-").Output()
if err != nil {
bodyResult.err = err
}
bodyResult.body = string(body)
br <- bodyResult
}()
return <-br, <-mr, nil
}
var pdfTimeLayouts = timeLayouts{time.ANSIC, "Mon Jan _2 15:04:05 2006 MST"}
type timeLayouts []string
func (tl timeLayouts) Parse(x string) (time.Time, bool) {
for _, layout := range tl {
t, err := time.Parse(layout, x)
if err == nil {
return t, true
}
}
return time.Time{}, false
}