nsIMIMEService

The MIME service is responsible for mapping file extensions to MIME-types
(see RFC 2045). It also provides access to nsIMIMEInfo interfaces and
acts as a general convenience wrapper of nsIMIMEInfo interfaces.

The MIME service maintains a database with a one MIME type to many
file extensions rule. Adding the same file extension to multiple MIME types
is illegal and behavior is undefined.

@see nsIMIMEInfo

Methods

getFromTypeAndExtension(aMIMEType, aFileExt)

Retrieves an nsIMIMEInfo using both the extension
and the type of a file. The type is given preference
during the lookup. One of aMIMEType and aFileExt
can be an empty string. At least one of aMIMEType and aFileExt
must be nonempty.

getTypeFromExtension(aFileExt)

Retrieves a ACString representation of the MIME type
associated with this file extension.

Parameters

Returns

getTypeFromURI(aURI)

Retrieves a ACString representation of the MIME type
associated with this URI. The association is purely
file extension to MIME type based. No attempt to determine
the type via server headers or byte scanning is made.

Parameters

Returns

getTypeFromFile(aFile)

getPrimaryExtension(aMIMEType, aFileExt)

Given a Type/Extension combination, returns the default extension
for this type. This may be identical to the passed-in extension.

Parameters