1package main
  2
  3import (
  4	"archive/zip"
  5	"fmt"
  6	"io"
  7	"os"
  8	"path"
  9	"path/filepath"
 10	"strings"
 11	"time"
 12)
 13
 14func timeago(t *time.Time) string {
 15	d := time.Since(*t)
 16	if d.Seconds() < 60 {
 17		seconds := int(d.Seconds())
 18		if seconds == 1 {
 19			return "1 second ago"
 20		}
 21		return fmt.Sprintf("%d seconds ago", seconds)
 22	} else if d.Minutes() < 60 {
 23		minutes := int(d.Minutes())
 24		if minutes == 1 {
 25			return "1 minute ago"
 26		}
 27		return fmt.Sprintf("%d minutes ago", minutes)
 28	} else if d.Hours() < 24 {
 29		hours := int(d.Hours())
 30		if hours == 1 {
 31			return "1 hour ago"
 32		}
 33		return fmt.Sprintf("%d hours ago", hours)
 34	} else {
 35		days := int(d.Hours()) / 24
 36		if days == 1 {
 37			return "1 day ago"
 38		}
 39		return fmt.Sprintf("%d days ago", days)
 40	}
 41}
 42
 43/// Perform some checks to make sure the file is OK
 44func checkIfValidFile(filename string, fileBytes []byte) error {
 45	if len(filename) == 0 {
 46		return fmt.Errorf("Please enter a filename")
 47	}
 48	if len(filename) > 256 { // arbitrarily chosen
 49		return fmt.Errorf("Filename is too long")
 50	}
 51	ext := strings.ToLower(path.Ext(filename))
 52	found := false
 53	for _, mimetype := range c.OkExtensions {
 54		if ext == mimetype {
 55			found = true
 56		}
 57	}
 58	if !found {
 59		return fmt.Errorf("Invalid file extension: %s", ext)
 60	}
 61	if len(fileBytes) > c.MaxFileSize {
 62		return fmt.Errorf("File too large. File was %d bytes, Max file size is %d", len(fileBytes), c.MaxFileSize)
 63	}
 64	return nil
 65}
 66
 67func zipit(source string, target io.Writer) error {
 68	archive := zip.NewWriter(target)
 69
 70	info, err := os.Stat(source)
 71	if err != nil {
 72		return nil
 73	}
 74
 75	var baseDir string
 76	if info.IsDir() {
 77		baseDir = filepath.Base(source)
 78	}
 79
 80	filepath.Walk(source, func(path string, info os.FileInfo, err error) error {
 81		if err != nil {
 82			return err
 83		}
 84
 85		header, err := zip.FileInfoHeader(info)
 86		if err != nil {
 87			return err
 88		}
 89
 90		if baseDir != "" {
 91			header.Name = filepath.Join(baseDir, strings.TrimPrefix(path, source))
 92		}
 93
 94		if info.IsDir() {
 95			header.Name += "/"
 96		} else {
 97			header.Method = zip.Deflate
 98		}
 99
100		writer, err := archive.CreateHeader(header)
101		if err != nil {
102			return err
103		}
104
105		if info.IsDir() {
106			return nil
107		}
108
109		file, err := os.Open(path)
110		if err != nil {
111			return err
112		}
113		defer file.Close()
114		_, err = io.Copy(writer, file)
115		return err
116	})
117
118	archive.Close()
119
120	return err
121}