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150

Chapter 7 Generating the Server Response: HTTP Response Headers

Table 7.1

Common MIME Types (continued)

application/zip

Zip archive

audio/basic

Sound file in .au or .snd format

audio/x aiff

AIFF sound file

audio/x wav

Microsoft Windows sound file

audio/midi

MIDI sound file

text/css

HTML cascading style sheet

text/html

HTML document

text/plain

Plain text

image/gif

GIF image

image/jpeg

JPEG image

image/png

PNG image

image/tiff

TIFF image

image/x xbitmap

X Window bitmap image

video/mpeg

MPEG video clip

video/quicktime

QuickTime video clip

Date

This header specifies the current date in GMT format. If you want to 

set the date from a servlet, use the 

setDateHeader

 method to specify 

it. That method saves you the trouble of formatting the date string prop 

erly, as would be necessary with 

response.setHeader("Date", 

"...")

. However, most servers set this header automatically, so servlets 

don't usually need to.

ETag

This new HTTP 1.1 header gives names to returned documents so that 

they can be referred to by the client later (as with the 

If Match

 request 

header).

Expires

This header stipulates the time at which the content should be consid 

ered out of date and thus no longer be cached. A servlet might use this 

Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.

Servlet and JSP training courses by book's author: courses.coreservlets.com.