I'm trying to pass some custom HTTP headers using <int-http:outbound-gateway> and <int:header-enricher> components of Spring Integration, but it doesn't work on my configuration.
I have tried two configurations. The first one with the "mapped-request-headers" attribute:
<int:chain input-channel="requestChannel" output-channel="replyChannel">
<int:header-enricher>
<int:header name="test" value="test"></int:header>
</int:header-enricher>
<int-http:outbound-gateway id="gateway"
encode-uri="true" url="http://localhost:8080/webapp/service/{request}"
http-method="GET" mapped-request-headers="test, HTTP_REQUEST_HEADERS">
<int-http:uri-variable name="request" expression="payload"/>
</int-http:outbound-gateway>
</int:chain>
The second one with the "header-mapper" attribute, with the relative DefaultHttpHeaderMapper configuration:
<int:chain input-channel="requestChannel" output-channel="replyChannel">
<int:header-enricher>
<int:header name="test" value="test"></int:header>
</int:header-enricher>
<int-http:outbound-gateway id="gateway"
encode-uri="true" url="http://localhost:8080/webapp/service/{request}"
http-method="GET" header-mapper="headerMapper">
<int-http:uri-variable name="request" expression="payload"/>
</int-http:outbound-gateway>
</int:chain>
<bean id="headerMapper" class="org.springframework.integration.http.support.DefaultHttpHeaderMapper">
<property name="outboundHeaderNames" value="HTTP_REQUEST_HEADERS, test" />
<property name="userDefinedHeaderPrefix" value="" />
</bean>
But in both cases, the message's headers loaded by the remote application are the following:
GenericMessage[
payload={},
headers={
http_requestMethod=GET,
replyChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@4c8b7a27,
errorChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@4c8b7a27,
host=localhost: 8080,
http_requestUrl=http://localhost:8080/webapp/service/hello,
connection=keep-alive,
id=3c2a21ba-b7f5-e5e9-c821-45251d406318,
cache-control=no-cache,
pragma=no-cache,
user-agent=Java/1.8.0_65,
accept=[
text/html,
image/gif,
image/jpeg,
*/*;q=.2,
*/*;q=.2],
timestamp=1469009855797
}
]
There is no trace of the "test" header that I'm trying to add to the request message.
What's the right way to add a custom header to the <int-http:outbound-gateway> ?
It's also good any other working solution.
UPDATE
As from Gary indication, I turned on the DEBUG mode.
This is a very interesting thing: the log says that the header [test] "will be mapped":
message sent: GenericMessage [payload=hello, headers={id=79f98422-418b-f00f-1e21-09461b1ff80c, timestamp=1469021452494}]
2016-07-20 15:53:57 DEBUG org.springframework.integration.http.support.DefaultHttpHeaderMapper.fromHeaders:402 (executor-4) - outboundHeaderNames=[test, HTTP_REQUEST_HEADERS]
2016-07-20 15:53:57 DEBUG org.springframework.integration.http.support.DefaultHttpHeaderMapper.shouldMapHeader:537 (executor-4) - headerName=[test] WILL be mapped, matched pattern=test
2016-07-20 15:53:57 DEBUG org.springframework.integration.http.support.DefaultHttpHeaderMapper.fromHeaders:420 (executor-4) - setting headerName=[X-test], value=test
2016-07-20 15:53:57 DEBUG org.springframework.http.client.support.HttpAccessor.createRequest:79 (executor-4) - Created GET request for "http://localhost:8080/webapp/service/hello"
I have implemented a simple Filter on the server side that intercepts every HTTP request, and it prints on the log every header of that request.
This is the result:
x-test=test
cache-control=no-cache
pragma=no-cache
user-agent=Java/1.8.0_65
host=localhost:8080
accept=text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
connection=keep-alive
So, the header "x-test" is present on the HttpServletRequest instance.
But after that, in the log I can see this other message (I have reported only those significant for this context):
2016-07-20 15:53:57 DEBUG org.springframework.web.servlet.DispatcherServlet.doService:865 (http-nio-8080-exec-1) - DispatcherServlet with name 'dispatcherServer' processing GET request for [/webapp/service/hello]
2016-07-20 15:53:57 DEBUG org.springframework.integration.http.support.DefaultHttpHeaderMapper.toHeaders:436 (http-nio-8080-exec-1) - inboundHeaderNames=[Accept, Accept-Charset, Accept-Encoding, Accept-Language, Accept-Ranges, Authorization, Cache-Control, Connection, Content-Length, Content-Type, Cookie, Date, Expect, From, Host, If-Match, If-Modified-Since, If-None-Match, If-Range, If-Unmodified-Since, Max-Forwards, Pragma, Proxy-Authorization, Range, Referer, TE, Upgrade, User-Agent, Via, Warning]
2016-07-20 15:53:57 DEBUG org.springframework.integration.http.support.DefaultHttpHeaderMapper.shouldMapHeader:561 (http-nio-8080-exec-1) - headerName=[x-test] WILL NOT be mapped
2016-07-20 15:53:57 DEBUG org.springframework.integration.handler.AbstractMessageHandler.handleMessage:115 (executor-4) - ServiceActivator for [org.springframework.integration.handler.MethodInvokingMessageProcessor@6ae60a] (channelServiceActivator) received message: GenericMessage [payload={}, headers={http_requestMethod=GET, replyChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@565fe0d8, errorChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@565fe0d8, host=localhost:8080, http_requestUrl=http://localhost:8080/webapp/service/hello, connection=keep-alive, id=9578f82d-7fc2-fe94-d8bf-3225ec955b22, cache-control=no-cache, pragma=no-cache, user-agent=Java/1.8.0_65, accept=[text/html, image/gif, image/jpeg, */*;q=.2, */*;q=.2], timestamp=1469022837172}]
Now the log says that the header "[x-test] WILL NOT be mapped". How is possibile? It's because it doesn't appear in the inboundHeaderNames ?
In fact, the header seems to be "disappeared" in the GenericMessage:
GenericMessage [
payload={},
headers={
http_requestMethod=GET,
replyChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@16b10fb6,
errorChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@16b10fb6,
host=localhost:8080,
http_requestUrl=http://localhost:8080/webapp/service/hello,
connection=keep-alive,
id=ba2af515-9e29-4d84-d176-5b9d0d066cb0,
cache-control=no-cache,
pragma=no-cache,
user-agent=Java/1.8.0_65,
accept=[text/html,
image/gif,
image/jpeg,
*/*;q=.2,
*/*;q=.2],
timestamp=1469021452542
}
]
I don't understand why the header in present in the HTTP Request, but it's no present in the headers of the Message channel.
