Proxy server configuration for blocking mode should be consistent with that of non-blocking mode

[tharikaGitHub]

Description:
The following proxy configuration parameters set in axis2.xml should work when added to axis2_blocking_client.xml in blocking scenarios. (<call blocking="true">)

<parameter locked="false" name="http.proxyHost">localhost</parameter>
<parameter locked="false" name="http.proxyPort">8080</parameter>
<parameter locked="false" name="http.nonProxyHosts">example.com</parameter>

Setting these parameters under org.apache.axis2.transport.http.CommonsHTTPTransportSender configuration doesn't work. They are being taken in as system parameters. Check [1] for more details.

As a solution, we can include code to read the above parameter values from the axis2_blocking_client.xml to method [2]. Also when validating nonProxyHosts, [3] should be modified to read from the configuration in addition to system properties. And [4] should be modified to reflect this logic of reading above parameters when checking if proxy is enabled.

[1] https://wso2.org/jira/browse/DOCUMENTATION-6914
[2] https://github.com/wso2/wso2-axis2/blob/master/modules/transport/http/src/org/apache/axis2/transport/http/util/HTTPProxyConfigurationUtil.java#L84
[3] https://github.com/wso2/wso2-axis2/blob/master/modules/transport/http/src/org/apache/axis2/transport/http/util/HTTPProxyConfigurationUtil.java#L277
[4] https://github.com/wso2/wso2-axis2/blob/master/modules/transport/http/src/org/apache/axis2/transport/http/util/HTTPProxyConfigurationUtil.java#L241

[npamudika]

The issue is transferred from wso2/wso2-axis2 repo as discussed internally and this will be considered in a future release.