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package paste
import(
"crypto/sha256"
"fmt"
"log"
"os"
"io/ioutil"
"errors"
"bufio"
"strings"
)
func Store(title, date, content, dest_dir string) (string, error) {
h := sha256.New()
h.Write([]byte(title))
h.Write([]byte(date))
h.Write([]byte(content))
paste := fmt.Sprintf("# Title: %s\n# Date: %s\n%s", title, date, content)
paste_hash := fmt.Sprintf("%x", h.Sum(nil))
log.Printf(" `-- hash: %s\n", paste_hash)
paste_dir := dest_dir + "/"
// Now we save the file
for i := 0; i < len(paste_hash)-16; i++ {
paste_name := paste_hash[i:i+16]
if _, err := os.Stat(paste_dir + paste_name); os.IsNotExist(err) {
// The file does not exist, so we can create it
if err := ioutil.WriteFile(paste_dir + paste_name, []byte(paste), 0644); err == nil {
// and then we return the URL:
log.Printf(" `-- saving new paste to : %s", paste_dir + paste_name)
return paste_name, nil
} else {
log.Printf("Cannot create the paste: %s!\n", paste_dir + paste_name)
}
}
}
return "", errors.New("Cannot store the paste...Sorry!")
}
func Retrieve(URI string) (title, date, content string, err error) {
f_cont, err := os.Open(URI)
defer f_cont.Close()
if err == nil {
stuff := bufio.NewScanner(f_cont)
// The first line contains the title
stuff.Scan()
title = strings.Trim(strings.Split(stuff.Text(), ":")[1], " ")
stuff.Scan()
date = strings.Trim(strings.Join(strings.Split(stuff.Text(), ":")[1:], ":"), " ")
for stuff.Scan() {
content += stuff.Text()
}
} else {
return "", "", "", errors.New("Cannot retrieve paste!!!")
}
return title, date, content, nil
}
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