APIM mediation sequence pass through Proxy - proxy

Question

I am working with WSO2 APIM manager in an isolated network environment and I need to access an end point outsite of this network zone: say https://my.endpoint. Luckily, there is a proxy (say http://the.localproxy:8080). Typically, in curl, I can do this successfully
curl -X POST https://my.endpoint/datahub/1.0.1/deliveryform_list --proxy http://the.localproxy:8080 -H "Content-Type: application/json" -d '{"company_code ": "1040", "offset": "0", "limit": "20", "date_from": "1574469733", "date_to": "1574772672", "search": "","refused" : "0","delivered" : "1","impossible_drain" : "0"}'
axis2.xml
I added the following in repository/conf/axis2/axis.xml:
<transportSender name="http" class="org.apache.synapse.transport.passthru.PassThroughHttpSender">
<parameter name="non-blocking" locked="false">true</parameter>
<!-- HERE -->
<parameter name="http.proxyHost" locked="false">the.localproxy</parameter>
<parameter name="http.proxyPort" locked="false">8080</parameter>
<parameter name="http.nonProxyHosts" locked="false">localhost|.*\.intra$</parameter>
</transportSender>
<transportSender name="https" class="org.apache.synapse.transport.passthru.PassThroughHttpSSLSender">
<parameter name="non-blocking" locked="false">true</parameter>
<parameter name="keystore" locked="false">
<KeyStore>
<Location>repository/resources/security/wso2carbon.jks</Location>
<Type>JKS</Type>
<Password>wso2carbon</Password>
<KeyPassword>wso2carbon</KeyPassword>
</KeyStore>
</parameter>
<parameter name="truststore" locked="false">
<TrustStore>
<Location>repository/resources/security/client-truststore.jks</Location>
<Type>JKS</Type>
<Password>wso2carbon</Password>
</TrustStore>
</parameter>
<!-- =======+++++++HERE++++++======= -->
<parameter name="http.proxyHost" locked="false">the.localproxy</parameter>
<parameter name="http.proxyPort" locked="false">8080</parameter>
<parameter name="http.nonProxyHosts" locked="false">localhost|.*\.intra</parameter>
<parameter name="dynamicSSLProfilesConfig">
<filePath>repository/resources/security/sslprofiles.xml</filePath>
<fileReadInterval>600000</fileReadInterval>
</parameter>
</transportSender>
Problem
However, connections do not seem to reach the external world.
TID: [-1234] [] [2019-12-06 10:41:31,420] INFO {org.apache.axis2.transport.http.HTTPSender} - Unable to sendViaPost to url[https://my.endpoint/datahub/1.0.1/deliveryform_list] {org.apache.axis2.transport.http.HTTPSender}
org.apache.commons.httpclient.ConnectTimeoutException: The host did not accept the connection within timeout of 60000 ms
at org.apache.commons.httpclient.protocol.ReflectionSocketFactory.createSocket(ReflectionSocketFactory.java:155)
at org.apache.commons.httpclient.protocol.SSLProtocolSocketFactory.createSocket(SSLProtocolSocketFactory.java:179)
at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.open(MultiThreadedHttpConnectionMan
ager.java:1361)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.axis2.transport.http.AbstractHTTPSender.executeMethod(AbstractHTTPSender.java:704)
at org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:199)
at org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:81)
at org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:459)
at org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:286)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:442)
at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:441)
at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:227)
at org.apache.axis2.client.OperationClient.execute(OperationClient.java:149)
at org.apache.synapse.message.senders.blocking.BlockingMsgSender.sendReceive(BlockingMsgSender.java:490)
at org.apache.synapse.message.senders.blocking.BlockingMsgSender.send(BlockingMsgSender.java:382)
at org.apache.synapse.core.axis2.Axis2FlexibleMEPClient.send(Axis2FlexibleMEPClient.java:88)
at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:85)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:547)
at org.apache.synapse.endpoints.AbstractEndpoint.send(AbstractEndpoint.java:384)
at org.apache.synapse.endpoints.HTTPEndpoint.send(HTTPEndpoint.java:85)
at org.apache.synapse.mediators.builtin.CallMediator.handleBlockingCall(CallMediator.java:164)
at org.apache.synapse.mediators.builtin.CallMediator.mediate(CallMediator.java:119)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:108)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:70)
at org.apache.synapse.mediators.filters.FilterMediator.mediate(FilterMediator.java:169)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:108)
--
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.mediate(APIManagerExtensionHandler.java:66)
at org.wso2.carbon.apimgt.gateway.handlers.ext.APIManagerExtensionHandler.handleRequest(APIManagerExtensionHandler.java:75)
at org.apache.synapse.rest.API.process(API.java:325)
at org.apache.synapse.rest.RESTRequestHandler.apiProcessNonDefaultStrategy(RESTRequestHandler.java:149)
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:95)
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:71)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:303)
at org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:92)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.synapse.transport.passthru.ServerWorker.processNonEntityEnclosingRESTHandler(ServerWorker.java:337)
at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:383)
at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:151)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:666)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.commons.httpclient.protocol.ReflectionSocketFactory.createSocket(ReflectionSocketFactory.java:140)
... 46 more
TID: [-1234] [] [2019-12-06 10:41:31,427] WARN {org.apache.synapse.endpoints.EndpointContext} - Endpoint : AnonymousEndpoint with a
ddress https://my.endpoint/datahub/1.0.1/deliveryform_list will be marked SUSPENDED as it failed {org.apache.synapse.endpoints.EndpointCon
text}
Am I right to assume that i) endpoint access are managed by the gateway and that ii) those two classes (PassThroughHttpSender and PassThroughHttpSSLSender) are the one involved in this process?

Answer 1

The only way you can configure proxy is globally. The ESB link you have mentioned talks about proxy services in ESB which is different than proxy servers.
If you explain why you don't want to add proxy configurations in axis2.xml, someone might be able to help you with that.