| author | ohair |
| Wed, 26 May 2010 20:28:04 -0700 | |
| changeset 5551 | 327690766109 |
| parent 5506 | 202f599c92aa |
| child 9266 | 121fb370f179 |
| permissions | -rw-r--r-- |
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> |
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<head> |
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<!-- |
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Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. |
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DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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This code is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License version 2 only, as |
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published by the Free Software Foundation. Oracle designates this |
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particular file as subject to the "Classpath" exception as provided |
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by Oracle in the LICENSE file that accompanied this code. |
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This code is distributed in the hope that it will be useful, but WITHOUT |
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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version 2 for more details (a copy is included in the LICENSE file that |
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accompanied this code). |
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You should have received a copy of the GNU General Public License version |
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2 along with this work; if not, write to the Free Software Foundation, |
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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327690766109
6956202: Fix a few missed rebranding issues, please contact lines etc.
ohair
parents:
5506
diff
changeset
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Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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327690766109
6956202: Fix a few missed rebranding issues, please contact lines etc.
ohair
parents:
5506
diff
changeset
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or visit www.oracle.com if you need additional information or have any |
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327690766109
6956202: Fix a few missed rebranding issues, please contact lines etc.
ohair
parents:
5506
diff
changeset
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questions. |
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--> |
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</head> |
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<body bgcolor="white"> |
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<p> |
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This package provides methods to read files from a JAR file and |
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to transform them to a more compact transfer format called Pack200. |
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It also provides methods to receive the transmitted data and expand |
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it into a JAR file equivalent to the original JAR file. |
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<p> |
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The <tt>pack</tt> methods may be used by application developers |
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who wish to deploy large JARs on the web. The <tt>unpack</tt> methods may be used |
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by deployment applications such as Java Web Start and Java Plugin. |
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<p> |
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In typical use, the packed output should be further compressed using |
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a suitable tool such as gzip or <tt>java.util.zip.GZIPOutputStream</tt>. |
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The resulting file (with a suffix ".pack.gz") should be hosted on a HTTP/1.1 |
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compliant server, which will be capable of handling "Accept-Encoding", |
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as specified by the HTTP 1.1 RFC2616 specification. |
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<p> |
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<b>NOTE:</b> It is recommended that the original ".jar" file be hosted |
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in addition to the ".pack.gz" file, so that older client implementations |
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will continue to work reliably. |
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(On-demand compression by the server is not recommended.) |
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<p> |
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When a client application requests a ".jar" file (call it "Large.jar"), |
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the client will transmit the headers |
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"Content-Type=application/x-java-archive" as well as "Accept-Encoding=pack200-gzip". |
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This indicates to the server that the client application desires an version |
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of the file encoded with Pack200 and further compressed with gzip. |
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<p> |
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The server implementation will typically check for the existence of "Large.pack.gz". |
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If that file is available, the server will transmit it with the headers |
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"Content-Encoding=pack200-gzip" and "Content-Type=application/x-java-archive". |
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<p> |
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If the ".pack.gz" file, is not available, then the server will transmit |
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the original ".jar" |
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with "Content-Encoding=null" and "Content-Type=application/x-java-archive". |
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<p> |
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A MIME type of "application/x-java-pack200" may be specified by the |
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client application to indicate a ".pack" file is required. |
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However, this has limited capability, and is not recommended. |
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<h2> Package Specification</h2> |
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Network Transfer Format Specification :<a href="http://jcp.org/en/jsr/detail?id=200"> |
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http://jcp.org/en/jsr/detail?id=200</a> |
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<h2> Related Documentation</h2> |
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For overviews, tutorials, examples, guides, and tool documentation, please |
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see: |
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<ul> |
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<li> |
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Jar File Specification :<a href="http://java.sun.com/j2se/1.3/docs/guide/jar/jar.html"> |
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http://java.sun.com/j2se/1.3/docs/guide/jar/jar.html</a></li> |
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<li> |
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Java Virtual Machine Specification : <a href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html"> |
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http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html</a></li> |
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<li> |
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Hypertext Transfer Protocol -- HTTP/1.1 : <a href="http://www.ietf.org/rfc/rfc2616.txt"> |
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http://www.ietf.org/rfc/rfc2616.txt |
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</ul> |
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<li> |
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@since JDK1.5.0</li> |
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<br><!-- Put @see and @since tags down here. --> |
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</body> |
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</html> |