88 lines
2.7 KiB
Go
88 lines
2.7 KiB
Go
// Package upload 提供平台总后台的受控文件上传服务。
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package upload
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import (
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"io"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"time"
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"git.apinb.com/bsm-sdk/core/errcode"
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"git.apinb.com/bsm-sdk/core/infra"
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"git.apinb.com/heqiapp/platforms/backend/api/internal/models"
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"github.com/gin-gonic/gin"
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)
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const maxUploadSize int64 = 10 << 20
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var allowedExtensions = map[string]struct{}{
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".jpg": {}, ".jpeg": {}, ".png": {}, ".webp": {}, ".pdf": {},
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}
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// UploadFileReply 是文件上传完成后返回的受控资源标识。
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type UploadFileReply struct {
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URI string `json:"uri"` // 资源访问标识，后续可由对象存储适配层解析
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OriginalName string `json:"original_name"` // 原始文件名，仅用于展示
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ContentType string `json:"content_type"` // 客户端声明的媒体类型
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Size int64 `json:"size"` // 文件字节数
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}
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// UploadFile 将允许类型的文件保存至本地 Mock 存储，不直接暴露绝对磁盘路径。
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func UploadFile(ctx *gin.Context) {
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ctx.Request.Body = http.MaxBytesReader(ctx.Writer, ctx.Request.Body, maxUploadSize)
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fileHeader, err := ctx.FormFile("file")
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if err != nil || fileHeader == nil || fileHeader.Size <= 0 || fileHeader.Size > maxUploadSize {
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infra.Response.Error(ctx, errcode.ErrInvalidArgument)
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return
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}
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extension := strings.ToLower(filepath.Ext(fileHeader.Filename))
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if _, allowed := allowedExtensions[extension]; !allowed {
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infra.Response.Error(ctx, errcode.ErrInvalidArgument)
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return
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}
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file, err := fileHeader.Open()
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if err != nil {
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infra.Response.Error(ctx, err)
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return
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}
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defer file.Close()
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datePath := time.Now().Format("2006/01/02")
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filename := models.NewIdentity() + extension
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directory := filepath.Join(uploadRoot(), filepath.FromSlash(datePath))
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if err := os.MkdirAll(directory, 0o750); err != nil {
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infra.Response.Error(ctx, err)
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return
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}
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target, err := os.OpenFile(filepath.Join(directory, filename), os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0o640)
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if err != nil {
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infra.Response.Error(ctx, err)
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return
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}
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defer target.Close()
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if _, err := io.Copy(target, file); err != nil {
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infra.Response.Error(ctx, err)
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return
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}
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infra.Response.Success(ctx, UploadFileReply{
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URI: "/uploads/" + datePath + "/" + filename,
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OriginalName: fileHeader.Filename,
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ContentType: fileHeader.Header.Get("Content-Type"),
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Size: fileHeader.Size,
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})
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}
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// uploadRoot 返回本地 Mock 存储根目录；生产环境可通过环境变量映射到受控挂载目录。
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func uploadRoot() string {
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if directory := strings.TrimSpace(os.Getenv("HEQI_UPLOAD_DIR")); directory != "" {
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return directory
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}
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return filepath.Join("runtime", "uploads")
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}
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