com.baidubce.util

Class Mimetypes

java.lang.Object

com.baidubce.util.Mimetypes

public class Mimetypes
extends Object

Utility class that maintains a listing of known Mimetypes, and determines the mimetype of files based on file extensions.

This class is obtained with the {#link getInstance() method that recognizes loaded mime types from the file mime.types if this file is available at the root of the classpath. The mime.types file format, and most of the content, is taken from the Apache HTTP server's mime.types file.

The format for mime type setting documents is: mimetype <Space | Tab>+ extension (<Space|Tab>+ extension)*. Any blank lines in the file are ignored, as are lines starting with # which are considered comments. Lines that have a mimetype but no associated extensions are also ignored.

Field Summary

Fields

Modifier and Type	Field and Description
static String	MIMETYPE_OCTET_STREAM The default binary mimetype: application/octet-stream

Method Summary

Modifier and Type	Method and Description
static Mimetypes	getInstance() Loads MIME type info from the file 'mime.types' in the classpath, if it's available.
String	getMimetype(File file) Determines the mimetype of a file by looking up the file's extension in an internal listing to find the corresponding mime type.
String	getMimetype(String fileName) Determines the mimetype of a file by looking up the file's extension in an internal listing to find the corresponding mime type.
void	loadAndReplaceMimetypes(InputStream is) Reads and stores the mime type setting corresponding to a file extension, by reading text from an InputStream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MIMETYPE_OCTET_STREAM

public static final String MIMETYPE_OCTET_STREAM

The default binary mimetype: application/octet-stream

See Also:

Constant Field Values

Method Detail

getInstance

public static Mimetypes getInstance()

Loads MIME type info from the file 'mime.types' in the classpath, if it's available.

loadAndReplaceMimetypes

public void loadAndReplaceMimetypes(InputStream is)
                             throws IOException

Reads and stores the mime type setting corresponding to a file extension, by reading text from an InputStream. If a mime type setting already exists when this method is run, the mime type value is replaced with the newer one.

Parameters:

is -

Throws:

IOException

getMimetype

public String getMimetype(String fileName)

Determines the mimetype of a file by looking up the file's extension in an internal listing to find the corresponding mime type. If the file has no extension, or the extension is not available in the listing contained in this class, the default mimetype application/octet-stream is returned.

A file extension is one or more characters that occur after the last period (.) in the file's name. If a file has no extension, Guesses the mimetype of file data based on the file's extension.

Parameters:

fileName - The name of the file whose extension may match a known mimetype.

Returns:

The file's mimetype based on its extension, or a default value of application/octet-stream if a mime type value cannot be found.

getMimetype

public String getMimetype(File file)

Determines the mimetype of a file by looking up the file's extension in an internal listing to find the corresponding mime type. If the file has no extension, or the extension is not available in the listing contained in this class, the default mimetype application/octet-stream is returned.

A file extension is one or more characters that occur after the last period (.) in the file's name. If a file has no extension, Guesses the mimetype of file data based on the file's extension.

Parameters:

file - the file whose extension may match a known mimetype.

Returns:

the file's mimetype based on its extension, or a default value of application/octet-stream if a mime type value cannot be found.