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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mime
import (
"syscall"
"unsafe"
)
func initMime() {
var root syscall.Handle
rootpathp, _ := syscall.UTF16PtrFromString(`\`)
if syscall.RegOpenKeyEx(syscall.HKEY_CLASSES_ROOT, rootpathp,
0, syscall.KEY_READ, &root) != nil {
return
}
defer syscall.RegCloseKey(root)
var count uint32
if syscall.RegQueryInfoKey(root, nil, nil, nil, &count, nil, nil, nil, nil, nil, nil, nil) != nil {
return
}
var buf [1 << 10]uint16
for i := uint32(0); i < count; i++ {
n := uint32(len(buf))
if syscall.RegEnumKeyEx(root, i, &buf[0], &n, nil, nil, nil, nil) != nil {
continue
}
ext := syscall.UTF16ToString(buf[:])
if len(ext) < 2 || ext[0] != '.' { // looking for extensions only
continue
}
var h syscall.Handle
extpathp, _ := syscall.UTF16PtrFromString(`\` + ext)
if syscall.RegOpenKeyEx(
syscall.HKEY_CLASSES_ROOT, extpathp,
0, syscall.KEY_READ, &h) != nil {
continue
}
var typ uint32
n = uint32(len(buf) * 2) // api expects array of bytes, not uint16
contenttypep, _ := syscall.UTF16PtrFromString("Content Type")
if syscall.RegQueryValueEx(
h, contenttypep,
nil, &typ, (*byte)(unsafe.Pointer(&buf[0])), &n) != nil {
syscall.RegCloseKey(h)
continue
}
syscall.RegCloseKey(h)
if typ != syscall.REG_SZ { // null terminated strings only
continue
}
mimeType := syscall.UTF16ToString(buf[:])
setExtensionType(ext, mimeType)
}
}
func initMimeForTests() map[string]string {
return map[string]string{
".PnG": "image/png",
}
}
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