Http网关和Json转换器：剥离的头

Question

---->HTTP-Inbound-Gateway->JSON-to-Object-Transformer->

客户：

<int:chain id="messageTransformerChain" input-channel="toServer" output-channel="messagesToServer">
    ...
    <int:object-to-json-transformer />
</int:chain>

<int-http:outbound-gateway id="httpOutToSever"
    request-channel="messagesToServer"
    reply-channel="replyFromServer"
    url="${server.endpoint}"
    http-method="POST"
    extract-request-payload="true"
    expected-response-type="java.lang.String" />

服务器：

<int-http:inbound-gateway id="httpInboundFromClientGateway"
    supported-methods="GET, POST"
    request-channel="fromClientChannel" />

<int:chain input-channel="fromClientChannel">
    <int:json-to-object-transformer />
    ...
</int:chain>

我不希望在通道的特定映射器上显式地指示类型，因为它们可以变化。有没有一种方法来配置我需要的组件来支持这个路径？

--引用--

（1）http://docs.spring.io/spring-integration/reference/html/messaging-transformation-chapter.html#Transformer滚动到Json Transformers小节

Answer 1

使用出站http适配器，用户头（在他的例子中是json类型信息）通过http以x-

...

<int-http:outbound-gateway request-channel="requestChannel" 
                           url="http://localhost:18080/http/receiveGateway"
                           http-method="POST"
                           mapped-request-headers="foo"
                           expected-response-type="java.lang.String"/>

POST /http/receiveGateway HTTP/1.1
Accept: text/plain, */*
X-foo: bar

在服务器端，x-不会被删除，因此您必须将其映射到X...

<int-http:inbound-gateway request-channel="receiveChannel"
                      path="/receiveGateway"
                      mapped-request-headers="x-foo"
                      supported-methods="POST"/>

然后，您需要在变压器之前的 中使用 来设置标题（减去“x-”）...

<int:header-enricher>
    <int:header name="json__TypeId__" expression="headers['x-json__TypeId__']" />
    ...
</int:header-enricher>

（注意小写x)。

编辑：

或者，在发送端，您可以将映射器配置为不为自定义头加前缀...

<bean id="mapper" class="org.springframework.integration.http.support.DefaultHttpHeaderMapper">
    <property name="outboundHeaderNames" value="foo,bar" />
    <property name="userDefinedHeaderPrefix" value="" />
</bean>