// @router /test/file/download [get]
func (c *TestController) Download() {
filename := c.GetString("name")
if filename == "" {
http.Error(c.Ctx.ResponseWriter, "Not Found", 404)
return
}
filename = fileDir + filename
_, err := os.Stat(filename)
if os.IsNotExist(err) {
http.Error(c.Ctx.ResponseWriter, "Not Found", 404)
return
}
ctype := mime.TypeByExtension(filepath.Ext(filename))
if ctype == "" {
ctype = "application/oct-stream"
}
en := context.ParseEncoding(c.Ctx.Request)
if en != "" {
c.Ctx.ResponseWriter.Header().Set("Content-Encoding", en)
}
c.Ctx.ResponseWriter.Header().Set("Content-Type", ctype)
f, err := os.Open(filename)
context.WriteFile(en, c.Ctx.ResponseWriter, f)
}
func openFile(filePath string, fi os.FileInfo, acceptEncoding string) (bool, string, *serveContentHolder, error) {
mapKey := acceptEncoding + ":" + filePath
mapLock.RLock()
mapFile, _ := staticFileMap[mapKey]
mapLock.RUnlock()
if isOk(mapFile, fi) {
return mapFile.encoding != "", mapFile.encoding, mapFile, nil
}
mapLock.Lock()
defer mapLock.Unlock()
if mapFile, _ = staticFileMap[mapKey]; !isOk(mapFile, fi) {
file, err := os.Open(filePath)
if err != nil {
return false, "", nil, err
}
defer file.Close()
var bufferWriter bytes.Buffer
_, n, err := context.WriteFile(acceptEncoding, &bufferWriter, file)
if err != nil {
return false, "", nil, err
}
mapFile = &serveContentHolder{Reader: bytes.NewReader(bufferWriter.Bytes()), modTime: fi.ModTime(), size: int64(bufferWriter.Len()), encoding: n}
staticFileMap[mapKey] = mapFile
}
return mapFile.encoding != "", mapFile.encoding, mapFile, nil
}