Sending requests to fetch information to https://URL

[AvinashMunaga]

Hi All,

I am new to using http adapters in SI. I am trying to sending a request to a URL that runs on only secured protocol i.e., 'https'. I have tried a lot a lot but not able to establish a connection to the URL.

I have tried using a proxy even but the connection is not established to the URL. Looking for some help from the group members on how to establish connection to a URL using http adapters.

Here is my configuration code:

<beans:bean id="httpDemo" class="blog.HTTPDemo" />

<int:channel id="requestChannel" />

<http:outbound-gateway request-channel="requestChannel" reply-channel="httpResponseChannel" auto-startup="true" url="https://login.salesforce.com/services/oauth2/token" />

<int:channel id="httpResponseChannel" />
	<!-- <int:queue capacity="10" />
</int:channel> -->
<int:service-activator input-channel="httpResponseChannel" ref="httpDemo" />

Thanks in Advance!!!

Regards,
Avinash Munaga.

[Gary Russell]

You need to look at the logs and/or what's going on "on the wire"; https just "works" because it is handled by the JVM.

For example, if you look at the basic/http sample here

https://github.com/SpringSource/spri...ration-samples

just change the URL to an https one and you'll see it just works.

<int-http:outbound-gateway request-channel="requestChannel" 
				           url="https://jira.springframework.org/"
				           http-method="GET"
				           expected-response-type="java.lang.String"/>

If you run a line monitor, like wireshark you can see all the SSL/TLS handshaking happening.

If you can't figure it out from debug level logs, try running wireshark - you won't be able to read the data, but you should at least see the socket establishment.

[yozh-tema]

Hi Avinash,

are you sure that connection is not established? Do you see error in log? I tried your sample and response is 400: Bad request - which is OK since I don't know required POST/GET params for this URL. But fetching https://accounts.google.com works fine. Btw. how do you send messages to requestChannel?

[AvinashMunaga]

Hi,

Thanks for the replies.

I am trying to send request like this.

ApplicationContext context = new ClassPathXmlApplicationContext("config-http.xml");
JSONObject json = new JSONObject();
//creating JSON
Message<?> message = MessageBuilder.withPayload(json.toString()).build( );
context.getBean("requestChannel", MessageChannel.class).send(message);

But, it's not working. Even tried sending request to integration in a different way like this:

ApplicationContext context = new ClassPathXmlApplicationContext("config-http.xml");
JSONObject json = new JSONObject();
//creating JSON
Message<?> message = MessageBuilder.withPayload(json.toString()).build( );
ChannelResolver resolver = new BeanFactoryChannelResolver(context);
MessageChannel channel = resolver.resolveChannelName("requestChannel");
channel.send(message);

This is the error message while sending request in both the cases.

WARNING: POST request for "https://login.salesforce.com/services/oauth2/token" resulted in 400 (Bad Request); invoking error handler
Exception in thread "main" org.springframework.integration.MessageHandlingExc eption: HTTP request execution failed for URI [https://login.salesforce.com/services/oauth2/token]
at org.springframework.integration.http.outbound.Http RequestExecutingMessageHandler.handleRequestMessag e(HttpRequestExecutingMessageHandler.java:284)
at org.springframework.integration.handler.AbstractRe plyProducingMessageHandler.handleMessageInternal(A bstractReplyProducingMessageHandler.java:97)
at org.springframework.integration.handler.AbstractMe ssageHandler.handleMessage(AbstractMessageHandler. java:73)
at org.springframework.integration.dispatcher.Unicast ingDispatcher.doDispatch(UnicastingDispatcher.java :114)
at org.springframework.integration.dispatcher.Unicast ingDispatcher.dispatch(UnicastingDispatcher.java:1 01)
at org.springframework.integration.channel.AbstractSu bscribableChannel.doSend(AbstractSubscribableChann el.java:61)
at org.springframework.integration.channel.AbstractMe ssageChannel.send(AbstractMessageChannel.java:157)
at org.springframework.integration.channel.AbstractMe ssageChannel.send(AbstractMessageChannel.java:128)
at blog.HTTPDemo.main(HTTPDemo.java:59)
Caused by: org.springframework.web.client.HttpClientErrorExce ption: 400 Bad Request
at org.springframework.web.client.DefaultResponseErro rHandler.handleError(DefaultResponseErrorHandler.j ava:76)
at org.springframework.web.client.RestTemplate.handle ResponseError(RestTemplate.java:486)
at org.springframework.web.client.RestTemplate.doExec ute(RestTemplate.java:443)
at org.springframework.web.client.RestTemplate.execut e(RestTemplate.java:409)
at org.springframework.web.client.RestTemplate.exchan ge(RestTemplate.java:384)
at org.springframework.integration.http.outbound.Http RequestExecutingMessageHandler.handleRequestMessag e(HttpRequestExecutingMessageHandler.java:258)
... 8 more

How are you guys sending message to the request channel. Could you please share some sample code that work's.

Thanks in Advance!!!

[yozh-tema]

This looks like rather problem during authentication, not connection problem of SI. You should check that all of required authentication parameters are set. Also, while I didn't work with OAuth, I think that you should use POST request:

<int-http:outbound-gateway http-method="POST"...