github.com/mtsmfm/go/src@v0.0.0-20221020090648-44bdcb9f8fde/mime/type_windows.go (about)

     1  // Copyright 2010 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package mime
     6  
     7  import (
     8  	"internal/syscall/windows/registry"
     9  )
    10  
    11  func init() {
    12  	osInitMime = initMimeWindows
    13  }
    14  
    15  func initMimeWindows() {
    16  	names, err := registry.CLASSES_ROOT.ReadSubKeyNames()
    17  	if err != nil {
    18  		return
    19  	}
    20  	for _, name := range names {
    21  		if len(name) < 2 || name[0] != '.' { // looking for extensions only
    22  			continue
    23  		}
    24  		k, err := registry.OpenKey(registry.CLASSES_ROOT, name, registry.READ)
    25  		if err != nil {
    26  			continue
    27  		}
    28  		v, _, err := k.GetStringValue("Content Type")
    29  		k.Close()
    30  		if err != nil {
    31  			continue
    32  		}
    33  
    34  		// There is a long-standing problem on Windows: the
    35  		// registry sometimes records that the ".js" extension
    36  		// should be "text/plain". See issue #32350. While
    37  		// normally local configuration should override
    38  		// defaults, this problem is common enough that we
    39  		// handle it here by ignoring that registry setting.
    40  		if name == ".js" && (v == "text/plain" || v == "text/plain; charset=utf-8") {
    41  			continue
    42  		}
    43  
    44  		setExtensionType(name, v)
    45  	}
    46  }
    47  
    48  func initMimeForTests() map[string]string {
    49  	return map[string]string{
    50  		".PnG": "image/png",
    51  	}
    52  }