如何在mule中设置查询参数以服务endpoint请求

Question

下面是mule flow xml文件和自定义请求转换器

<http:connector name="ClientOutboundHttpConnector">
       <service-overrides sessionHandler="org.mule.session.NullSessionHandler"/>
    </http:connector>
   
    
<!--  Below is the flow for sample rest endpoint -->

<custom-transformer
        name="SampleRequestTransformer"
        class="com.example.SampleRequestTrasformer" />
        
        <custom-transformer
        name="SampleResponseTransformer"
        class="com.example.SampleResponseTrasformer" />
    
    <flow name="sampleRESTFlow" doc:name="sample rest Flow">
                     
        <inbound-endpoint address="servlet://getDetails" exchange-pattern="request-response" connector-ref="muleCXFServletConnector" 
                transformer-refs="SampleRequestTransformer"  responseTimeout="600000" />
                
        
        
        <http:outbound-endpoint
            address="http://xyzhost:port/greet123"
            connector-ref="ClientOutboundHttpConnector"
            exchange-pattern="request-response"
            contentType="application/x-www-form-urlencoded"
            keep-alive="true"
            responseTimeout="360000"
            responseTransformer-refs="InputStreamToStringTransformer"/>

        <logger
            message="MappingServer Response after reading stream=#[payload]"
            level="INFO" />

        <transformer ref="SampleResponseTransformer" />

        <transformer ref="clientErrorResponseTransformer" />

        

    </flow>

下面是自定义请求转换器的代码

    @Override
    public Object transformMessage(MuleMessage message, String arg1)
            throws TransformerException {
        // TODO Auto-generated method stub
        Object payload = message.getPayload();
        Map<String,String> queryParams= new HashMap<String,String>();
        queryParams.put("salary", "400000");
        queryParams.put("age", "32");
        
        
        
    
        message.setProperty("Content-Type", "application/x-www-form-urlencoded", PropertyScope.OUTBOUND);
        message.setProperty("mimeType","application/x-www-form-urlencoded",PropertyScope.OUTBOUND);
        message.setProperty("http.method", "POST", PropertyScope.OUTBOUND);
        message.setProperty("http.query.params",queryParams, PropertyScope.OUTBOUND);
        
        
        return message;
    }

}```
    

Answer 1

第一，http错误400表示资源不可用。但是服务器和端口都没问题。因此，/greet123不可用。问题不是你的代码--问题是没有人在听它。尝试常规浏览器或邮递员-结果将是相同的-400错误。

第二骡子3是不推荐的。据我所知，3.8今年将失去支持。3.3是很久以前的事了。骡子4是当前版本，没有办法骡子3可以转移到骡子4。

https://simpleflatservice.com/mule4/mule3tomule4transformation.html