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Allow servers to specify ENABLE_PUSH to 0 explicitly

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Motivation:

If server sends SETTINGS with ENABLE_PUSH, its handled as
PROTOCOL_ERROR in spite of the value. But the value specified to
0 may be allowed in RFC7540.

Modifications:

Check whether ENABLE_PUSH sent from a server is 0 or not.

Result:

When server specifies ENABLE_PUSH to 0 explicitly, client doesn't
handle it as PROTOCOL_ERROR.
This commit is contained in:
Ryo Okubo 2015-07-08 01:06:32 +09:00 committed by nmittler
parent ac1bb12b22
commit f3c3f3e60c
1 changed files with 3 additions and 2 deletions
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5
codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2ConnectionEncoder.java
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@ -77,8 +77,9 @@ public class DefaultHttp2ConnectionEncoder implements Http2ConnectionEncoder {
Http2HeaderTable outboundHeaderTable = config.headerTable();
Http2FrameSizePolicy outboundFrameSizePolicy = config.frameSizePolicy();
if (pushEnabled != null) {
if (!connection.isServer()) {
throw connectionError(PROTOCOL_ERROR, "Client received SETTINGS frame with ENABLE_PUSH specified");
if (!connection.isServer() && pushEnabled) {
throw connectionError(PROTOCOL_ERROR,
"Client received a value of ENABLE_PUSH specified to other than 0");
}
connection.remote().allowPushTo(pushEnabled);
}