Golang models.Image类代码示例

func ImageFilter(ctx *context.Context) {
	token := path.Base(ctx.Request.RequestURI)

	// split token and file ext
	var filePath string
	if i := strings.IndexRune(token, '.'); i == -1 {
		return
	} else {
		filePath = token[i+1:]
		token = token[:i]
	}

	// decode token to file path
	var image models.Image
	if err := image.DecodeToken(token); err != nil {
		beego.Info(err)
		return
	}

	// file real path
	filePath = attachment.GenImagePath(&image) + filePath

	// if x-send on then set header and http status
	// fall back use proxy serve file
	if setting.ImageXSend {
		ext := filepath.Ext(filePath)
		ctx.Output.ContentType(ext)
		ctx.Output.Header(setting.ImageXSendHeader, "/"+filePath)
		ctx.Output.SetStatus(200)
	} else {
		// direct serve file use go
		http.ServeFile(ctx.ResponseWriter, ctx.Request, filePath)
	}
}

func GenImageFilePath(img *models.Image, width int) string {
	var size string
	if width == 0 {
		size = "full"
	} else {
		size = utils.ToStr(width)
	}
	return GenImagePath(img) + size + img.GetExt()
}

func QiniuImageFilter(ctx *context.Context) {
	var imageName = path.Base(ctx.Request.RequestURI)
	var imageKey string
	var imageSize string
	if i := strings.IndexRune(imageName, '.'); i == -1 {
		return
	} else {
		imageSize = imageName[i+1:]
		if j := strings.IndexRune(imageSize, '.'); j == -1 {
			imageSize = "full"
		} else {
			imageSize = imageSize[:j]
		}
		imageKey = imageName[:i]
	}

	var image = models.Image{
		Token: imageKey,
	}
	err := image.Read("Token")
	if err != nil {
		return
	}
	var imageWidth = image.Width
	var imageHeight = image.Height
	var zoomRatio = setting.ImageSizeMiddle / imageWidth
	if imageWidth > setting.ImageSizeMiddle {
		imageWidth = setting.ImageSizeMiddle
	}
	imageHeight *= zoomRatio

	var imageUrl = utils.GetQiniuPublicDownloadUrl(setting.QiniuPostDomain, imageKey)
	var zoomImageUrl = utils.GetQiniuZoomViewUrl(imageUrl, imageWidth, imageHeight)
	resp, err := http.Get(zoomImageUrl)
	if err != nil {
		return
	}
	defer resp.Body.Close()
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return
	}
	ctx.ResponseWriter.Write(body)
}

func (this *UploadRouter) Post() {
	result := map[string]interface{}{
		"success": false,
	}

	defer func() {
		this.Data["json"] = &result
		this.ServeJson()
	}()

	// check permition
	if !this.User.IsActive {
		return
	}

	// get file object
	file, handler, err := this.Ctx.Request.FormFile("image")
	if err != nil {
		return
	}
	defer file.Close()

	t := time.Now()

	image := models.Image{}
	image.User = &this.User

	// get mime type
	mime := handler.Header.Get("Content-Type")

	// save and resize image
	if err := attachment.SaveImage(&image, file, mime, handler.Filename, t); err != nil {
		beego.Error(err)
		return
	}

	result["link"] = image.LinkMiddle()
	result["success"] = true

}

func SaveImageToQiniu(m *models.Image, r goio.ReadSeeker, mime string, filename string, created time.Time, bucketName string) error {
	var ext string

	// check image mime type
	switch mime {
	case "image/jpeg":
		ext = ".jpg"

	case "image/png":
		ext = ".png"

	case "image/gif":
		ext = ".gif"

	default:
		ext = filepath.Ext(filename)
		switch ext {
		case ".jpg", ".png", ".gif":
		default:
			return fmt.Errorf("unsupport image format `%s`", filename)
		}
	}

	// decode image
	var img image.Image
	var err error
	switch ext {
	case ".jpg":
		m.Ext = 1
		img, err = jpeg.Decode(r)
	case ".png":
		m.Ext = 2
		img, err = png.Decode(r)
	case ".gif":
		m.Ext = 3
		img, err = gif.Decode(r)
	}

	if err != nil {
		return err
	}

	m.Width = img.Bounds().Dx()
	m.Height = img.Bounds().Dy()
	m.Created = created

	//save to database
	if err := m.Insert(); err != nil || m.Id <= 0 {
		return err
	}

	m.Token = m.GetToken()
	if err := m.Update(); err != nil {
		return err
	}

	var key = m.Token

	//reset reader pointer
	if _, err := r.Seek(0, 0); err != nil {
		return err
	}

	//save to qiniu
	var uptoken = utils.GetQiniuUptoken(bucketName)
	var putRet io.PutRet
	var putExtra = &io.PutExtra{
		MimeType: mime,
	}

	err = io.Put(nil, &putRet, uptoken, key, r, putExtra)
	if err != nil {
		return err
	}

	return nil
}

func SaveImage(m *models.Image, r io.ReadSeeker, mime string, filename string, created time.Time) error {
	var ext string

	// test image mime type
	switch mime {
	case "image/jpeg":
		ext = ".jpg"

	case "image/png":
		ext = ".png"

	case "image/gif":
		ext = ".gif"

	default:
		ext = filepath.Ext(filename)
		switch ext {
		case ".jpg", ".png", ".gif":
		default:
			return fmt.Errorf("unsupport image format `%s`", filename)
		}
	}

	// decode image
	var img image.Image
	var err error
	switch ext {
	case ".jpg":
		m.Ext = 1
		img, err = jpeg.Decode(r)
	case ".png":
		m.Ext = 2
		img, err = png.Decode(r)
	case ".gif":
		m.Ext = 3
		img, err = gif.Decode(r)
	}

	if err != nil {
		return err
	}

	m.Width = img.Bounds().Dx()
	m.Height = img.Bounds().Dy()
	m.Created = created

	if err := m.Insert(); err != nil || m.Id <= 0 {
		return err
	}

	m.Token = m.GetToken()
	if err := m.Update(); err != nil {
		return err
	}

	path := GenImagePath(m)
	os.MkdirAll(path, 0755)

	fullPath := GenImageFilePath(m, 0)
	if _, err := r.Seek(0, 0); err != nil {
		return err
	}

	var file *os.File
	if f, err := os.OpenFile(fullPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644); err != nil {
		return err
	} else {
		file = f
	}

	if _, err := io.Copy(file, r); err != nil {
		os.RemoveAll(fullPath)
		return err
	}

	if ext != ".gif" {

		if m.Width > setting.ImageSizeSmall {
			if err := ImageResize(m, img, setting.ImageSizeSmall); err != nil {
				os.RemoveAll(fullPath)
				return err
			}
		}

		if m.Width > setting.ImageSizeMiddle {
			if err := ImageResize(m, img, setting.ImageSizeMiddle); err != nil {
				os.RemoveAll(fullPath)
				return err
			}
		}

	}

	return nil
}