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|
package connector
import (
"bytes"
"io"
"net/http"
"os"
"path/filepath"
log "github.com/sirupsen/logrus"
)
type FileMediaObject struct {
Path string
}
func (m *FileMediaObject) Filename() string {
return filepath.Base(m.Path)
}
func (m *FileMediaObject) Size() int64 {
fi, err := os.Stat(m.Path)
if err != nil {
log.Fatal(err)
}
return fi.Size()
}
func (m *FileMediaObject) Mimetype() string {
f, err := os.Open(m.Path)
if err != nil {
log.Fatal(err)
}
defer f.Close()
buffer := make([]byte, 512)
_, err = f.Read(buffer)
if err != nil {
log.Fatal(err)
}
return http.DetectContentType(buffer)
}
func (m *FileMediaObject) ImageSize() *ImageSize {
// TODO but not really usefull
return nil
}
func (m *FileMediaObject) Read() (io.ReadCloser, error) {
return os.Open(m.Path)
}
func (m *FileMediaObject) URL() string {
return ""
}
// ----
type UrlMediaObject struct {
ObjectFilename string
ObjectSize int64
ObjectMimetype string
ObjectURL string
ObjectImageSize *ImageSize
}
func (m *UrlMediaObject) Filename() string {
return m.ObjectFilename
}
func (m *UrlMediaObject) Size() int64 {
return m.ObjectSize
}
func (m *UrlMediaObject) Mimetype() string {
return m.ObjectMimetype
}
func (m *UrlMediaObject) ImageSize() *ImageSize {
return m.ObjectImageSize
}
func (m *UrlMediaObject) Read() (io.ReadCloser, error) {
resp, err := http.Get(m.ObjectURL)
if err != nil {
return nil, err
}
return resp.Body, nil
}
func (m *UrlMediaObject) URL() string {
return m.ObjectURL
}
// ----
type BlobMediaObject struct {
ObjectFilename string
ObjectMimetype string
ObjectImageSize *ImageSize
ObjectData []byte
}
func (m *BlobMediaObject) Filename() string {
return m.ObjectFilename
}
func (m *BlobMediaObject) Size() int64 {
return int64(len(m.ObjectData))
}
func (m *BlobMediaObject) Mimetype() string {
return m.ObjectMimetype
}
func (m *BlobMediaObject) ImageSize() *ImageSize {
return m.ObjectImageSize
}
func (m *BlobMediaObject) Read() (io.ReadCloser, error) {
return nullCloseReader{bytes.NewBuffer(m.ObjectData)}, nil
}
func (m *BlobMediaObject) URL() string {
return ""
}
type nullCloseReader struct {
io.Reader
}
func (ncr nullCloseReader) Close() error {
return nil
}
// ----
type LazyBlobMediaObject struct {
ObjectFilename string
ObjectMimetype string
ObjectImageSize *ImageSize
ObjectData []byte
GetFn func(o *LazyBlobMediaObject) error
}
func (m *LazyBlobMediaObject) Filename() string {
return m.ObjectFilename
}
func (m *LazyBlobMediaObject) Size() int64 {
if m.ObjectData == nil {
m.GetFn(m)
}
return int64(len(m.ObjectData))
}
func (m *LazyBlobMediaObject) Mimetype() string {
if m.ObjectData == nil {
m.GetFn(m)
}
return m.ObjectMimetype
}
func (m *LazyBlobMediaObject) ImageSize() *ImageSize {
if m.ObjectData == nil {
m.GetFn(m)
}
return m.ObjectImageSize
}
func (m *LazyBlobMediaObject) Read() (io.ReadCloser, error) {
if m.ObjectData == nil {
err := m.GetFn(m)
if err != nil {
return nil, err
}
}
return nullCloseReader{bytes.NewBuffer(m.ObjectData)}, nil
}
func (m *LazyBlobMediaObject) URL() string {
return ""
}
|
