WSDL中SOAP绑定和HTTP绑定之间的区别

Question

我使用的WSDL有两个端口 - 一个有soap绑定，另一个有HTTP绑定。据我所知，SOAP是一种用于消息传递的协议，但仍然使用HTTP作为传输协议。那么使用这两个端口有什么区别？

包含绑定和服务的WSDL的一部分：

<wsdl:binding name="OperationServiceNextGenHttpBinding" type="tns:OperationServiceNextGenPort">

    <http:binding verb="POST"/>
    <wsdl:operation name="operation">

        <http:operation location="/operation"/>
        <wsdl:input>
            <mime:content type="application/x-www-form-urlencoded"/>


        </wsdl:input>
        <wsdl:output>
            <mime:content type="text/xml"/>
        </wsdl:output>
    </wsdl:operation>
</wsdl:binding>
<wsdl:binding name="OperationServiceNextGenSOAPBinding" type="tns:OperationServiceNextGenPort">

    <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
    <wsdl:operation name="operation">

        <soap:operation soapAction="http://some.schema.com/marketplace/search/v1/services/operation"/>
        <wsdl:input>

            <soap:body use="literal"/>
        </wsdl:input>
        <wsdl:output>

            <soap:body use="literal"/>
        </wsdl:output>
    </wsdl:operation>
</wsdl:binding>
<wsdl:service name="OperationServiceNextGen">
    <wsdl:documentation>
        <version>1.1.10</version>
    </wsdl:documentation>
    <wsdl:port binding="tns:OperationServiceNextGenHttpBinding" name="OperationServiceNextGenHttpPort">
        <http:address location="https://svcs.ebay.com/services/search/v1/OperationServiceNextGen"/>
    </wsdl:port>
    <wsdl:port binding="tns:OperationServiceNextGenSOAPBinding" name="OperationServiceNextGenSOAPPort">
        <soap12:address location="https://svcs.ebay.com/services/search/v1/OperationServiceNextGen"/>
    </wsdl:port>

</wsdl:service>