WSO2 XML 声明 [英] WSO2 XML Declaration

问题描述

我正在使用 WSO2 ESB 4.0.3 来部署一个简单的服务.我有一个返回以下 XML 的服务:

I'm using WSO2 ESB 4.0.3 to deploy a simple service. I have a service returning the following XML:

<Employees>
    <Employee>
        <EmployeeID>JOHNDOE1</EmployeeID>
        <FirstName>JOHN</FirstName>
        <LastName>DOE</LastName>
    </Employee>
    <Status>1</Status>
</Employees>

我遇到的问题是没有 XML 声明.是否有设置会返回包含 XML 声明的响应，或者我是否需要使用 ESB 响应来添加它?我希望有类似的东西:

The problem I'm having is that there is no XML declaration. Is there a setting that will return the response with the XML declaration included, or do I need to use the ESB response to add it? I was hoping for something like:

<?xml version="1.0" encoding="utf-8"?>
<Employees>
    <Employee>
        <EmployeeID>JOHNDOE1</EmployeeID>
        <FirstName>JOHN</FirstName>
        <LastName>DOE</LastName>
    </Employee>
    <Status>1</Status>
</Employees>

感谢任何帮助.

推荐答案

这是一个老问题，但看到我刚才遇到同样的问题，我会发布我的解决方案.

This is an old question, but seeing as I ran into the same thing just now I'll post my solution.

我需要一个代理服务返回一个没有封闭的soap信封的纯XML消息.我尝试使用 application/xml 和 text/xml (org.apache.axis2.transport.http.ApplicationXMLFormatter 和 org.wso2.carbon.relay.ExpandingMessageFormatter)内容类型无济于事.这些内容类型都没有返回带有 XML 声明的消息.

I needed to have a proxy service return a plain XML message without the enclosing soap envelope. I tried using application/xml and text/xml (org.apache.axis2.transport.http.ApplicationXMLFormatter and org.wso2.carbon.relay.ExpandingMessageFormatter respectively) content types to no avail. Neither of these content types returned the message with the XML declaration.

解决方案是编写自定义消息格式化程序.这是我的实现，其行为类似于 org.apache.axis2.transport.http.ApplicationXMLFormatter 但正确地将 XML 声明写入消息.

The solution is to write a custom message formatter. Here's my implementation that behaves like org.apache.axis2.transport.http.ApplicationXMLFormatter but properly writes the XML declaration to the message.

package com.example.axis2.messageformatter;

import java.io.IOException;
import java.io.OutputStream;

import org.apache.axiom.om.OMOutputFormat;
import org.apache.axis2.AxisFault;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.transport.http.ApplicationXMLFormatter;

public class CustomApplicationXmlFormatter extends ApplicationXMLFormatter {

  @Override
  public void writeTo(MessageContext context, OMOutputFormat format, OutputStream out, boolean preserve) throws AxisFault {
    String xmlHeader = "<?xml version=\"1.0\" encoding=\"" + format.getCharSetEncoding() + "\"?>";
    try {
      out.write(xmlHeader.getBytes());
    } catch (IOException e) {
      throw new AxisFault("Unable to write XML declaration to output stream.", e);
    }
    super.writeTo(context, format, out, preserve);
  }
}

您可以将 jar 文件中的类放到 /repository/components/lib.此外，您需要通过将以下内容添加到文件的消息格式化程序部分来引用 axis2 配置 (<ESB_ROOT>/repository/conf/axis2/axis2.xml) 中的类:>

You can drop the class in a jar file to <ESB_ROOT>/repository/components/lib. Additionally you need to refer to the class from the axis2 config (<ESB_ROOT>/repository/conf/axis2/axis2.xml) by adding the following into the message formatters portion of the file:

<messageFormatter contentType="application/xml" class="com.example.axis2.messageformatter.CustomApplicationXmlFormatter"/>

这篇关于WSO2 XML 声明的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！