如何在 esb 中读取 http 标头 [英] how to read http headers in esb

问题描述

如何将属性设置为传入的 http 请求标头的值?我尝试了一些事情(见下文)，但我的日志值都是空的，所以我显然没有正确读取标题值.我真正关心的标头值是 X-EMPID.使用 wso2esb 4.8.1.

How do I set a property to the value of an incoming http request header? I tried a few things (see following), but my log values are all null, so I'm clearly not reading the header values correctly. The header value I really care about is X-EMPID. Using wso2esb 4.8.1.

这里有一对情侣帖子 让我相信这会起作用，但我还没有运气.

Here are a couple of posts that led me to believe this would work, but I'm not having any luck yet.

<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="getaccount2"
       transports="https,http"
       statistics="disable"
       trace="disable"
       startOnLoad="true">
   <target>
      <inSequence>
         <property name="empid"
                   expression="get-property('transport', 'X-EMPID')"
                   scope="default"
                   type="STRING"/>
         <log level="custom">
            <property name="emp_id" expression="get-property('empid')"/>
         </log>
         <log level="custom">
            <property name="content_length"
                      expression="get-property('transport', 'Content-Length')"/>
         </log>
         <log level="custom">
            <property name="TRANSPORT_HEADERS" expression="get-property('TRANSPORT_HEADERS')"/>
         </log>

推荐答案

通过使用 XPath 变量，您可以方便地访问 HTTP 标头，技术上是 WSO2 ESB 中的传输标头.读取名为 X-EMPID 的 HTTP 标头的最简单方法是使用以下 XPath:$trp:X-EMPID，其中 $trp 前缀表示冒号后面的部分是传输属性的名称.要记录标头值，您可以使用以下日志中介:

You can conveniently access HTTP headers, which technically are transport headers in WSO2 ESB, by using XPath variables. The easiest way to read an HTTP header named X-EMPID is by using the following XPath: $trp:X-EMPID, where the $trp prefix indicates that the part following the colon is the name of a transport property. To log the header value you could use the following log mediator:

<log level="custom">
    <property name="X-EMPID value" expression="$trp:X-EMPID" />
</log>

要将属性 myProperty 设置为 X-EMPID HTTP 标头(已存储在传输属性中)的值，您可以使用属性中介:

To set the property myProperty to the value of X-EMPID HTTP header (which is already stored in a transport property) you would use the property mediator:

<property name="myProperty" expression="$trp:X-EMPID" />

WSO2 网站上记录了该功能.

这篇关于如何在 esb 中读取 http 标头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！