Spring集成：在http出站网关中将json作为请求体和头发送

我希望使用JSON负载调用外部REST端点POST请求，该负载将通过http入站网关从另一个服务调用

我正在为我的应用程序使用以下配置：

<int:channel id="xappSearchRequest" />
<int:channel id="xappSearchResponse" />

<int:channel id="xappFilterChannelOutput"/>
<int:channel id="discardFilterChannel"/>
<int:channel id="mutableMessageChannel"/>

<int:filter  input-channel="mutableMessageChannel" output-channel="xappFilterChannelOutput" discard-channel="discardFilterChannel" ref="structureValidationFilter"/>

 <int:transformer input-channel="xappSearchRequest" output-channel="mutableMessageChannel"
    ref="mutableMessageTransformer" />


<int-http:inbound-gateway id="inboundxappSearchRequestGateway"
    supported-methods="POST"
    request-channel="xappSearchRequest"
    reply-channel="xappSearchResponse"
    mapped-response-headers="Return-Status, Return-Status-Msg, HTTP_RESPONSE_HEADERS"
    path="${xapp.request.path}"
    reply-timeout="50000"
    request-payload-type="standalone.CFIRequestBody">
</int-http:inbound-gateway>

<int:service-activator id="xappServiceActivator"
                input-channel="xappFilterChannelOutput"
                output-channel="xappSearchResponse"
                ref="xappSearchService"
                method="handlexappRequest"
                requires-reply="true"
                send-timeout="60000"/>



<int:service-activator id="dicardPayloadServiceActivator"
                input-channel="discardFilterChannel"
                output-channel="xappSearchResponse"
                ref="invalidPayloadService"
                method="getInvalidMessage"
                requires-reply="true"
                send-timeout="60000"/>


<int-http:outbound-gateway id="get.outbound.gateway"
    request-channel="get_send_channel" url="${cms.stub.request.url}"
    http-method="POST" reply-channel="get_receive_channel"
    expected-response-type="standalone.StubResponseBody">
</int-http:outbound-gateway>

---

无法确定如何发送JSON有效负载和自定义头来调用POST端点。

可以使用适当的属性映射请求头将自定义头映射到HTTP头

关于此事有完整的文件：

对于JSON，请求随RestTemplate一起提供，如果类路径上有jackson数据绑定，则RestTemplate配置了MappingJackson2HttpMessageConverter。应用程序只需要发送一个可以序列化为JSON的POJO，这一点很重要——一个带有application/JSON值的MessageHeaders.CONTENT\u类型头。

解决了这个问题。 我使用的出站网关如下所示：

<int-http:outbound-gateway id="get.outbound.gateway"
    request-channel="postCmsChannel" url="${cms.stub.request.url}"
    http-method="POST" reply-channel="zappSearchResponse"
    expected-response-type="standalone.StubResponseBody">
</int-http:outbound-gateway> 

@Autowired
@Qualifier("postCmsChannel")
MessageChannel postCmsChannel;

 public void handleXappRequest(Message<CFIRequestBody> inMessage){


       /*
       * Map<String, Object> responseHeaderMap = new HashMap<String, Object>();
       * 
        * //MessageHeaders headers = inMessage.getHeaders(); StubResponseBody
       * info=inMessage.getPayload();
       * 
        * setReturnStatusAndMessage(responseHeaderMap); Message<StubResponseBody>
       * message = new GenericMessage<StubResponseBody>(info, responseHeaderMap);
       * return message;
       */
       inMessage.getHeaders();
       Map<String,String> headerMap=new HashMap<String,String>();
       headerMap.put("X-JWS-SIGNATURE", "dshdgshdgasshgdywtwtqsabh232wgd7wdyt");
       headerMap.put("X-PARTICIPANT-ID", "CMDRV2112BB");
      postCmsChannel.send(MessageBuilder.withPayload(inMessage.getPayload())

.copyHeadersIfAbsent(inMessage.getHeaders()).copyHeadersIfAbsent(headerMap).build());

 }

}

“PostMSCChannel”是service activator的输出通道：

   <int:service-activator id="zappServiceActivator"
input-channel="xappFilterChannelOutput"
output-channel="postCmsChannel"
ref="xappSearchService"
method="handleXappRequest"
send-timeout="60000"/>

“xappSearchService”如下所示：

<int-http:outbound-gateway id="get.outbound.gateway"
    request-channel="postCmsChannel" url="${cms.stub.request.url}"
    http-method="POST" reply-channel="zappSearchResponse"
    expected-response-type="standalone.StubResponseBody">
</int-http:outbound-gateway> 

@Autowired
@Qualifier("postCmsChannel")
MessageChannel postCmsChannel;

 public void handleXappRequest(Message<CFIRequestBody> inMessage){


       /*
       * Map<String, Object> responseHeaderMap = new HashMap<String, Object>();
       * 
        * //MessageHeaders headers = inMessage.getHeaders(); StubResponseBody
       * info=inMessage.getPayload();
       * 
        * setReturnStatusAndMessage(responseHeaderMap); Message<StubResponseBody>
       * message = new GenericMessage<StubResponseBody>(info, responseHeaderMap);
       * return message;
       */
       inMessage.getHeaders();
       Map<String,String> headerMap=new HashMap<String,String>();
       headerMap.put("X-JWS-SIGNATURE", "dshdgshdgasshgdywtwtqsabh232wgd7wdyt");
       headerMap.put("X-PARTICIPANT-ID", "CMDRV2112BB");
      postCmsChannel.send(MessageBuilder.withPayload(inMessage.getPayload())

.copyHeadersIfAbsent(inMessage.getHeaders()).copyHeadersIfAbsent(headerMap).build());

 }

}

---

你能给我一个例子，在我不确定你需要什么的情况下，JSON请求作为有效负载发送。我相信您有一些POJO，它实际上可以作为HTTP网关的消息负载。您只需要在发送到该网关之前添加ContentType=application/json头。我已经编辑了我的原始帖子，包含了完整的配置和要求。我的集成层位于两个REST服务之间……您没有显示如何发送以获取发送通道，请注意，这实际上就是我被卡住的地方…xappServiceActivator必须调用出站网关，然后将输出返回到实际调用的服务