Prentice Hall and Sun Microsystems. Personal use only; do not redistribute.
98
Chapter 4 Handling the Client Request: HTTP Request Headers
Figure 4 2
Request headers sent by Internet Explorer 5 on Windows 98.
4.3 HTTP 1.1 Request Headers
Access to the request headers permits servlets to perform a number of opti 
mizations and to provide a number of features not otherwise possible. This
section presents each of the possible HTTP 1.1 request headers along with a
brief summary of how servlets can make use of them. The following sections
give more detailed examples. 
Note that HTTP 1.1 supports a superset of the headers permitted in
HTTP 1.0. For additional details on these headers, see the HTTP 1.1 specifi 
cation, given in RFC 2616. There are a number of places the official RFCs
are archived on line; your best bet is to start at 
http://www.rfc edi 
tor.org/
 to get a current list of the archive sites.
Accept
This header specifies the MIME types that the browser or other client 
can handle. A servlet that can return a resource in more than one format 
Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.
Servlet and JSP training courses by book's author: courses.coreservlets.com.






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