http://maverick.i2p/blog/darknet-dev
Proper containment combines storage isolation, randomized naming, binary validation, and execution denial so that even if one layer fails, the others still block exploitation. In Go, check magic bytes (MIME sniffing) and rename the file. GO func UploadHeader ( file multipart.File , header * multipart.FileHeader ) error { // Magic bytes detection. buff := make ( [ ] byte , 512 ) n , err := file .