Golang info.File类代码示例

// 复制外网的图片, 成公共图片 放在/upload下
// 都要好好的计算大小
func (c File) CopyHttpImage(src string) revel.Result {
	re := info.NewRe()
	fileUrlPath := "upload/" + c.GetUserId() + "/images"
	dir := revel.BasePath + "/public/" + fileUrlPath
	err := os.MkdirAll(dir, 0755)
	if err != nil {
		return c.RenderJson(re)
	}
	filesize, filename, _, ok := netutil.WriteUrl(src, dir)

	if !ok {
		re.Msg = "copy error"
		return c.RenderJson(re)
	}

	// File
	fileInfo := info.File{Name: filename,
		Title: filename,
		Path:  fileUrlPath + "/" + filename,
		Size:  filesize}

	id := bson.NewObjectId()
	fileInfo.FileId = id

	re.Id = id.Hex()
	re.Item = fileInfo.Path
	re.Ok, re.Msg = fileService.AddImage(fileInfo, "", c.GetUserId(), true)

	return c.RenderJson(re)
}

// delete image
func (this *FileService) DeleteImage(userId, fileId string) (bool, string) {
	file := info.File{}
	db.GetByIdAndUserId(db.Files, fileId, userId, &file)

	if file.FileId != "" {
		if db.DeleteByIdAndUserId(db.Files, fileId, userId) {
			// delete image
			// TODO
			file.Path = strings.TrimLeft(file.Path, "/")
			var err error
			if strings.HasPrefix(file.Path, "upload") {
				Log(file.Path)
				err = os.Remove(revel.BasePath + "/public/" + file.Path)
			} else {
				err = os.Remove(revel.BasePath + "/" + file.Path)
			}
			if err == nil {
				return true, ""
			}
			return false, "delete file error!"
		}
		return false, "db error"
	}
	return false, "no such item"
}

// 复制外网的图片
// 都要好好的计算大小
func (c File) CopyHttpImage(src string) revel.Result {
	re := info.NewRe()

	// 生成上传路径
	newGuid := NewGuid()
	userId := c.GetUserId()
	// fileUrlPath := "files/" + Digest3(userId) + "/" + userId + "/" + Digest2(newGuid) + "/images"
	fileUrlPath := "files/" + GetRandomFilePath(userId, newGuid) + "/images"
	dir := revel.BasePath + "/" + fileUrlPath
	err := os.MkdirAll(dir, 0755)
	if err != nil {
		return c.RenderJson(re)
	}
	filesize, filename, _, ok := netutil.WriteUrl(src, dir)

	if !ok {
		re.Msg = "copy error"
		return c.RenderJson(re)
	}

	// File
	fileInfo := info.File{Name: filename,
		Title: filename,
		Path:  fileUrlPath + "/" + filename,
		Size:  filesize}

	id := bson.NewObjectId()
	fileInfo.FileId = id

	re.Id = id.Hex()
	//	re.Item = fileInfo.Path
	re.Ok, re.Msg = fileService.AddImage(fileInfo, "", c.GetUserId(), true)

	return c.RenderJson(re)
}

// add Image
func (this *FileService) AddImage(image info.File, albumId, userId string) bool {
	image.CreatedTime = time.Now()
	if albumId != "" {
		image.AlbumId = bson.ObjectIdHex(albumId)
	} else {
		image.AlbumId = bson.ObjectIdHex(DEFAULT_ALBUM_ID)
		image.IsDefaultAlbum = true
	}
	image.UserId = bson.ObjectIdHex(userId)

	return db.Insert(db.Files, image)
}

// 复制共享的笔记时, 复制其中的图片到我本地
// 复制图片
func (this *FileService) CopyImage(userId, fileId, toUserId string) (bool, string) {
	// 是否已经复制过了
	file2 := info.File{}
	db.GetByQ(db.Files, bson.M{"UserId": bson.ObjectIdHex(toUserId), "FromFileId": bson.ObjectIdHex(fileId)}, &file2)
	if file2.FileId != "" {
		return true, file2.FileId.Hex()
	}

	// 复制之
	file := info.File{}
	db.GetByIdAndUserId(db.Files, fileId, userId, &file)

	if file.FileId == "" || file.UserId.Hex() != userId {
		return false, ""
	}

	_, ext := SplitFilename(file.Name)
	guid := NewGuid()
	newFilename := guid + ext

	// TODO 统一目录格式
	// dir := "files/" + toUserId + "/images"
	dir := "files/" + GetRandomFilePath(toUserId, guid) + "/images"
	filePath := dir + "/" + newFilename
	err := os.MkdirAll(revel.BasePath+dir, 0755)
	if err != nil {
		return false, ""
	}

	_, err = CopyFile(revel.BasePath+"/"+file.Path, revel.BasePath+"/"+filePath)
	if err != nil {
		return false, ""
	}

	fileInfo := info.File{Name: newFilename,
		Title:      file.Title,
		Path:       filePath,
		Size:       file.Size,
		FromFileId: file.FileId}
	id := bson.NewObjectId()
	fileInfo.FileId = id
	fileId = id.Hex()
	Ok, _ := this.AddImage(fileInfo, "", toUserId, false)

	if Ok {
		return Ok, id.Hex()
	}
	return false, ""
}

// 上传图片, 公用方法
// upload image common func
func (c File) uploadImage(from, albumId string) (re info.Re) {
	var fileUrlPath = ""
	var fileId = ""
	var resultCode = 0      // 1表示正常
	var resultMsg = "error" // 错误信息
	var Ok = false

	defer func() {
		re.Id = fileId // 只是id, 没有其它信息
		re.Code = resultCode
		re.Msg = resultMsg
		re.Ok = Ok
	}()

	file, handel, err := c.Request.FormFile("file")
	if err != nil {
		return re
	}
	defer file.Close()
	// 生成上传路径
	if from == "logo" || from == "blogLogo" {
		fileUrlPath = "public/upload/" + c.GetUserId() + "/images/logo"
	} else {
		fileUrlPath = "files/" + c.GetUserId() + "/images"
	}
	dir := revel.BasePath + "/" + fileUrlPath
	err = os.MkdirAll(dir, 0755)
	if err != nil {
		return re
	}
	// 生成新的文件名
	filename := handel.Filename

	var ext string
	if from == "pasteImage" {
		ext = ".png" // TODO 可能不是png类型
	} else {
		_, ext = SplitFilename(filename)
		if ext != ".gif" && ext != ".jpg" && ext != ".png" && ext != ".bmp" && ext != ".jpeg" {
			resultMsg = "Please upload image"
			return re
		}
	}

	filename = NewGuid() + ext
	data, err := ioutil.ReadAll(file)
	if err != nil {
		LogJ(err)
		return re
	}

	var maxFileSize float64
	if from == "logo" {
		maxFileSize = configService.GetUploadSize("uploadAvatarSize")
	} else if from == "blogLogo" {
		maxFileSize = configService.GetUploadSize("uploadBlogLogoSize")
	} else {
		maxFileSize = configService.GetUploadSize("uploadImageSize")
	}
	if maxFileSize <= 0 {
		maxFileSize = 1000
	}

	// > 2M?
	if float64(len(data)) > maxFileSize*float64(1024*1024) {
		resultCode = 0
		resultMsg = fmt.Sprintf("The file Size is bigger than %vM", maxFileSize)
		return re
	}

	toPath := dir + "/" + filename
	err = ioutil.WriteFile(toPath, data, 0777)
	if err != nil {
		LogJ(err)
		return re
	}
	// 改变成gif图片
	_, toPathGif := TransToGif(toPath, 0, true)
	filename = GetFilename(toPathGif)
	filesize := GetFilesize(toPathGif)
	fileUrlPath += "/" + filename
	resultCode = 1
	resultMsg = "Upload Success!"

	// File
	fileInfo := info.File{Name: filename,
		Title: handel.Filename,
		Path:  fileUrlPath,
		Size:  filesize}

	id := bson.NewObjectId()
	fileInfo.FileId = id
	fileId = id.Hex()
	if from == "logo" || from == "blogLogo" {
		fileId = "public/upload/" + c.GetUserId() + "/images/logo/" + filename
	}

	Ok, resultMsg = fileService.AddImage(fileInfo, albumId, c.GetUserId(), from == "" || from == "pasteImage")
//.........这里部分代码省略.........