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|
package api
import (
"fmt"
"io"
"net/http"
"os"
"path/filepath"
"strings"
"time"
)
// handleListDrops returns a JSON array of files in the drops directory.
func (s *Server) handleListDrops(w http.ResponseWriter, r *http.Request) {
if s.dropsDir == "" {
writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "drops directory not configured"})
return
}
entries, err := os.ReadDir(s.dropsDir)
if err != nil {
if os.IsNotExist(err) {
writeJSON(w, http.StatusOK, []map[string]interface{}{})
return
}
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "failed to list drops"})
return
}
type fileEntry struct {
Name string `json:"name"`
Size int64 `json:"size"`
Modified time.Time `json:"modified"`
}
files := []fileEntry{}
for _, e := range entries {
if e.IsDir() {
continue
}
info, err := e.Info()
if err != nil {
continue
}
files = append(files, fileEntry{
Name: e.Name(),
Size: info.Size(),
Modified: info.ModTime().UTC(),
})
}
writeJSON(w, http.StatusOK, files)
}
// handleGetDrop serves a file from the drops directory as an attachment.
func (s *Server) handleGetDrop(w http.ResponseWriter, r *http.Request) {
if s.dropsDir == "" {
writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "drops directory not configured"})
return
}
filename := r.PathValue("filename")
if strings.Contains(filename, "/") || strings.Contains(filename, "..") {
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid filename"})
return
}
path := filepath.Join(s.dropsDir, filepath.Clean(filename))
// Extra safety: ensure the resolved path is still inside dropsDir.
if !strings.HasPrefix(path, s.dropsDir) {
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid filename"})
return
}
f, err := os.Open(path)
if err != nil {
if os.IsNotExist(err) {
writeJSON(w, http.StatusNotFound, map[string]string{"error": "file not found"})
return
}
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "failed to open file"})
return
}
defer f.Close()
w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s"`, filename))
w.Header().Set("Content-Type", "application/octet-stream")
io.Copy(w, f) //nolint:errcheck
}
// handlePostDrop accepts a file upload (multipart/form-data or raw body with ?filename=).
func (s *Server) handlePostDrop(w http.ResponseWriter, r *http.Request) {
if s.dropsDir == "" {
writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "drops directory not configured"})
return
}
if err := os.MkdirAll(s.dropsDir, 0700); err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "failed to create drops directory"})
return
}
ct := r.Header.Get("Content-Type")
if strings.Contains(ct, "multipart/form-data") {
s.handleMultipartDrop(w, r)
return
}
// Raw body with ?filename= query param.
filename := r.URL.Query().Get("filename")
if filename == "" {
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "filename query param required for raw upload"})
return
}
if strings.Contains(filename, "/") || strings.Contains(filename, "..") {
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid filename"})
return
}
path := filepath.Join(s.dropsDir, filename)
data, err := io.ReadAll(r.Body)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "failed to read body"})
return
}
if err := os.WriteFile(path, data, 0600); err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "failed to save file"})
return
}
writeJSON(w, http.StatusCreated, map[string]interface{}{"name": filename, "size": len(data)})
}
func (s *Server) handleMultipartDrop(w http.ResponseWriter, r *http.Request) {
if err := r.ParseMultipartForm(32 << 20); err != nil { // 32 MB limit
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "failed to parse multipart form: " + err.Error()})
return
}
file, header, err := r.FormFile("file")
if err != nil {
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "missing 'file' field: " + err.Error()})
return
}
defer file.Close()
filename := filepath.Base(header.Filename)
if filename == "" || filename == "." {
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid filename"})
return
}
path := filepath.Join(s.dropsDir, filename)
dst, err := os.Create(path)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "failed to create file"})
return
}
defer dst.Close()
n, err := io.Copy(dst, file)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "failed to write file"})
return
}
writeJSON(w, http.StatusCreated, map[string]interface{}{"name": filename, "size": n})
}
|
