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Posted to dev@activemq.apache.org by "Marcel Casado (JIRA)" <ji...@apache.org> on 2011/07/03 08:54:21 UTC
[jira] [Updated] (AMQ-3387) Backards imcompatibilitiy with version
5.3 and previous with the http protocol due chage on charset encoding
[ https://issues.apache.org/jira/browse/AMQ-3387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marcel Casado updated AMQ-3387:
-------------------------------
Attachment: HttpClientTransport.java
TextWireFormat.java
Modified classes
> Backards imcompatibilitiy with version 5.3 and previous with the http protocol due chage on charset encoding
> ------------------------------------------------------------------------------------------------------------
>
> Key: AMQ-3387
> URL: https://issues.apache.org/jira/browse/AMQ-3387
> Project: ActiveMQ
> Issue Type: Bug
> Components: Transport
> Affects Versions: 5.4.0, 5.4.2, 5.5.0
> Reporter: Marcel Casado
> Attachments: HttpClientTransport.java, TextWireFormat.java
>
>
> Changes in charset encoding from java modified UTF-8 to standard UTF-8 in class org.apache.activemq.transport.util.TextWireFormat makes clients and broker using different versions not compatible when using http transport protocol. Like a client 5.3 and broker 5.5 can not interchange messages in http transport protocol or the other way around. Backards compatibility support could be easily provided with :
> public Object unmarshal(DataInput in) throws IOException {
> String value;
> try {
> int length = in.readInt();
> byte[] utf8 = new byte[length];
> in.readFully(utf8);
> value = new String(utf8, "UTF-8");
> return unmarshalText(value);
> } catch(Exception ex) {
> DataByteArrayInputStream dbais = (DataByteArrayInputStream) in;
> dbais.restart(0);
> value = dbais.readUTF();
> return unmarshalText(value);
> }
> }
> and in HttpClientTransport calling unmarshal with a DataByteArrayInputStream:
> DataByteArrayInputStream stream = new DataByteArrayInputStream(httpMethod.getResponseBody());
> Object command = (Object)getTextWireFormat().unmarshal(stream);
> With this changes was able to connect legacy clients 5.3 to new 5.5 brokers.
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