SunYF
bb1bb2c3f5
1. 新增全局上传配置，设置默认20MB请求体上限与上传目录 2. 重构上传文件处理，按天自动创建子目录存储文件 3. 修复巡检上传表单移动端强制调用相机的问题 4. 为MES与库房客户端添加响应式侧边栏，支持桌面折叠与移动端抽屉模式 5. 补充PAD端巡检页面的独立访问说明文档 6. 删除冗余的前端静态首页文件 7. 更新库房客户端静态资源哈希值
78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
package handler
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import (
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"crypto/rand"
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"encoding/hex"
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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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)
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// saveUploadFile 保存上传文件（工艺图纸PDF / 巡检照片），返回生成的相对文件名（含日期子目录）
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func saveUploadFile(r *http.Request, field, dir string) (string, error) {
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sub := time.Now().Format("2006-01-02")
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full := filepath.Join(dir, sub)
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if err := os.MkdirAll(full, 0o755); err != nil {
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return "", err
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}
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file, header, err := r.FormFile(field)
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if err != nil {
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return "", err
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}
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defer file.Close()
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ext := strings.ToLower(filepath.Ext(header.Filename))
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if ext == "" {
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ext = ".bin"
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}
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name := time.Now().Format("20060102150405") + "_" + randHex(6) + ext
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dst, err := os.Create(filepath.Join(full, name))
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if err != nil {
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return "", err
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}
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defer dst.Close()
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if _, err := io.Copy(dst, file); err != nil {
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return "", err
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}
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return filepath.ToSlash(filepath.Join(sub, name)), nil
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}
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func randHex(n int) string {
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b := make([]byte, n)
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_, _ = rand.Read(b)
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return hex.EncodeToString(b)[:n*2]
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}
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// serveUploadFile 下发上传目录中的文件（仅允许 单层日期子目录/文件名，防路径穿越）
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func serveUploadFile(w http.ResponseWriter, r *http.Request, dir, name string) {
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name = strings.TrimSpace(name)
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clean := filepath.Clean(filepath.FromSlash(name))
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if clean == "." || clean == ".." ||
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strings.HasPrefix(clean, ".."+string(filepath.Separator)) ||
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filepath.IsAbs(clean) || strings.ContainsRune(name, '\x00') {
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http.Error(w, "非法文件名", http.StatusBadRequest)
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return
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}
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f, err := os.Open(filepath.Join(dir, clean))
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if err != nil {
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http.Error(w, "文件不存在", http.StatusNotFound)
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return
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}
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defer f.Close()
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ct := "application/octet-stream"
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base := strings.ToLower(clean)
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switch {
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case strings.HasSuffix(base, ".pdf"):
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ct = "application/pdf"
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case strings.HasSuffix(base, ".jpg"), strings.HasSuffix(base, ".jpeg"):
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ct = "image/jpeg"
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case strings.HasSuffix(base, ".png"):
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ct = "image/png"
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}
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w.Header().Set("Content-Type", ct)
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http.ServeContent(w, r, name, time.Time{}, f)
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}
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