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|
package uploadedfile
import (
"errors"
"image"
"image/gif"
"image/jpeg"
"image/png"
"net/http"
"os"
)
type UploadedFile struct {
filename string
path string
mime string
hash string
thumbs []*ThumbFile
}
var supportedTypes = map[string]bool{
"image/jpeg": true,
"image/jpg": true,
"image/gif": true,
"image/png": true,
}
func NewUploadedFile(filename, path string, thumbs []*ThumbFile) (*UploadedFile, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
buff := make([]byte, 512) // http://golang.org/pkg/net/http/#DetectContentType
_, err = file.Read(buff)
if err != nil {
return nil, err
}
filetype := http.DetectContentType(buff)
if _, ok := supportedTypes[filetype]; !ok {
return nil, errors.New("Unsupported file type!")
}
return &UploadedFile{
filename,
path,
filetype,
"",
thumbs,
}, nil
}
func (this *UploadedFile) GetFilename() string {
return this.filename
}
func (this *UploadedFile) SetFilename(filename string) {
this.filename = filename
}
func (this *UploadedFile) GetHash() string {
return this.hash
}
func (this *UploadedFile) SetHash(hash string) {
this.hash = hash
}
func (this *UploadedFile) SetPath(path string) {
// TODO: find a better location for this
os.Remove(this.path)
this.path = path
}
func (this *UploadedFile) GetPath() string {
return this.path
}
func (this *UploadedFile) GetMime() string {
return this.mime
}
func (this *UploadedFile) SetMime(mime string) {
this.mime = mime
}
func (this *UploadedFile) GetThumbs() []*ThumbFile {
return this.thumbs
}
func (this *UploadedFile) FileSize() (int64, error) {
f, err := os.Open(this.path)
if err != nil {
return 0, err
}
stats, err := f.Stat()
if err != nil {
return 0, err
}
size := stats.Size()
return size, nil
}
func (this *UploadedFile) Clean() {
os.Remove(this.path)
for _, thumb := range this.thumbs {
os.Remove(thumb.path)
}
}
func (this *UploadedFile) Dimensions() (int, int, error) {
f, err := os.Open(this.path)
if err != nil {
return 0, 0, err
}
var cfg image.Config
switch true {
case this.IsGif():
cfg, err = gif.DecodeConfig(f)
case this.IsPng():
cfg, err = png.DecodeConfig(f)
case this.IsJpeg():
cfg, err = jpeg.DecodeConfig(f)
default:
return 0, 0, errors.New("Invalid mime type!")
}
if err != nil {
return 0, 0, err
}
return cfg.Width, cfg.Height, nil
}
func (this *UploadedFile) IsJpeg() bool {
return (this.GetMime() == "image/jpeg" || this.GetMime() == "image/jpg")
}
func (this *UploadedFile) IsPng() bool {
return this.GetMime() == "image/png"
}
func (this *UploadedFile) IsGif() bool {
return this.GetMime() == "image/gif"
}
|
