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prepare.go
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prepare.go
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package upload
import (
"path"
uploadClient "github.com/webx-top/client/upload"
"github.com/admpub/nging/application/model/file/storer"
"github.com/webx-top/echo"
)
var NopChecker uploadClient.Checker = func(r *uploadClient.Result) error {
return nil
}
type PrepareData struct {
newStorer Constructor
storer Storer
StorerInfo storer.Info
DBSaver DBSaver
Checker uploadClient.Checker
Checkin Checker
TableName string
FieldName string
FileType string
}
func (p *PrepareData) Storer(ctx echo.Context) (Storer, error) {
var err error
if p.storer == nil {
p.storer, err = p.newStorer(ctx, p.TableName) // 使用表名称作为文件夹名
}
return p.storer, err
}
func (p *PrepareData) Close() error {
if p.storer == nil {
return nil
}
return p.storer.Close()
}
// Prepare 上传前的环境准备
func Prepare(ctx echo.Context, uploadType string, fileType string, storerInfo storer.Info) (*PrepareData, error) {
if len(uploadType) == 0 {
return nil, ctx.E(`请提供参数“%s”`, ctx.Path())
}
tableName, fieldName, defaults := GetTableInfo(uploadType)
if !SubdirIsAllowed(uploadType, defaults...) {
return nil, ctx.E(`参数“%s”未被登记`, uploadType)
}
//echo.Dump(ctx.Forms())
newStore := StorerGet(storerInfo.Name)
if newStore == nil {
return nil, ctx.E(`存储引擎“%s”未被登记`, storerInfo.Name)
}
dbsaver := DBSaverGet(uploadType, defaults...)
checker := func(r *uploadClient.Result) error {
extension := path.Ext(r.FileName)
if len(r.FileType) > 0 {
if !uploadClient.CheckTypeExtension(fileType, extension) {
return ctx.E(`不支持将扩展名为“%v”的文件作为“%v”类型的文件来进行上传`, extension, fileType)
}
} else {
r.FileType = uploadClient.FileType(uploadClient.DetectType(extension))
}
return NopChecker(r)
}
data := &PrepareData{
newStorer: newStore,
StorerInfo: storerInfo,
DBSaver: dbsaver,
Checker: checker,
Checkin: CheckerGet(uploadType, defaults...),
TableName: tableName,
FieldName: fieldName,
FileType: fileType,
}
return data, nil
}