Hello Alexander,
I agree that my implementation about "Connection: Keep-Alive" is
incorrect. Thank you.
And as mentioned in the spec of "Persistent Connections"[1]:
.....
/The support for HTTP keep-Alive is done transparently. However, it can
be controlled by system properties http.keepAlive, and
http.maxConnections, as well as by HTTP/1.1 specified request and
response headers.
The system properties that control the behavior of Keep-Alive are:
http.keepAlive=<boolean>
default: true
Indicates if keep alive (persistent) connections should be supported.
http.maxConnections=<int>
default: 5
Indicates the maximum number of connections per destination to be kept
alive at any given time/
.....
So we SHALL provide some kind of cache mechanism to support Persistent
Connections, would you mind raise a separate JIRA about this issue?
Thanks a lot.
1.http://java.sun.com/j2se/1.5.0/docs/guide/net/http-keepalive.html
Alexander Kleymenov (JIRA) wrote:
[ http://issues.apache.org/jira/browse/HARMONY-499?page=comments#action_12414202 ]
Alexander Kleymenov commented on HARMONY-499:
---------------------------------------------
Hello,
I am working on HttpsURLConnection and noticed this JIRA report.
I went through the Java 5 Enhancements for Networking and could not found any statements for HttpURLConnection.
Then I examined the HTTP protocol specification
(RFC 2616 can be found at http://www.ietf.org/rfc/rfc2616.txt).
It says:
"HTTP/1.1 applications that do not support persistent connections MUST
include the "close" connection option in every message."
The source file of HttpURLConnection implementation does not seem to support persistent connections.
So recent changes made to the class
org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection
("Connection: close" --> "Connection: Keep-Alive") seem to be incorrect without
implementation of support for persistent connections.
Thanks,
Alexander
Java 5 Enhancement: java.net.HttpURLConnection should send request head with a
connection-field of "Keep-Alive"
---------------------------------------------------------------------------------------------------------------
Key: HARMONY-499
URL: http://issues.apache.org/jira/browse/HARMONY-499
Project: Harmony
Type: Improvement
Components: Classlib
Reporter: Richard Liang
Assignee: Tim Ellison
Priority: Minor
Attachments: luni.src.net.diff
Hello,
java.net.HttpURLConnection should send request head with a default connection-field of
"Keep-Alive". Currently in its implementation, it sends a connection-field of
"close", but does not close its own socket after connection, which may cause low
performance and strange behavior on some servers.
Best regards,
Richard
--
Richard Liang
China Software Development Lab, IBM
