【发布时间】：2018-03-13 12:16:42
【问题描述】：
我正在使用 Mule EE 3.5.2。 我正在向 Mule 中的传入 HTTP 端点发布一个带有 cookie 标头的 HTTP 请求（PostMan）。如何阅读此 Cookie？ 在实践中，这个 cookie 将通过一个 NGinX 代理；我需要它传递给另一个应用程序。
【问题讨论】：
【发布时间】：2018-03-13 12:16:42
【问题描述】：
首先确保您的连接器有enableCookies="true"。
然后您会找到一个名为 cookies 的 inboundProperty，类型为 Lorg.apache.commons.httpclient.Cookie。
要访问它们，只需#[message.inboundProperties['cookies']。
【讨论】：
以下是如何在没有自定义 java 类的情况下将来自 rest 响应的 cookie 保存在会话变量中。
<set-session-variable variableName="incomingCookies" value="#[org.mule.transport.http.CookieHelper.parseCookiesAsAClient(message.inboundProperties['set-cookie'],null)]" doc:name="Set incomingCookies as Session Variable"/>
<set-variable variableName="cookie-name" value="#[org.mule.transport.http.CookieHelper.getCookieValueFromCookies(incomingCookieMap,'cookie-name')]" doc:name=“Set cookie-name as Flow Variable”/>
您可以使用类似的方法从 CookieHelper 类中的 parseCookiesAsAServer 方法从休息请求中提取 cookie。
更多关于 CookieHelper 类的信息在这里https://www.mulesoft.org/docs/site/3.8.0/apidocs/org/mule/transport/http/CookieHelper.html
【讨论】：
这不再适用于新的 http:listener 组件。 设置该属性将给出：
org.xml.sax.SAXParseException: cvc-complex-type.3.2.2: Attribute 'enableCookies' is not allowed to appear in element 'http:listener'.
那么如何使用新的 http:listener 组件来做到这一点... 我遇到的一个问题是我需要访问传入的 cookie，而 Mule 仅以未格式化的字符串提供 cookie。
所以这是我的一个朋友开发的一个选项，我对其进行了一些改进，以便在流程中轻松访问 cookie：
package transformers;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.mule.api.MuleMessage;
import org.mule.api.transformer.TransformerException;
import org.mule.api.transport.PropertyScope;
import org.mule.transformer.AbstractMessageTransformer;
import org.mule.transport.http.CookieHelper;
import org.apache.commons.httpclient.Cookie;
public class CookieGrabber extends AbstractMessageTransformer {
public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException {
Object _CookieHeader = message.getInboundProperty("Cookie");
List<Cookie> _CookieList = null;
Map<String,String> _CookieMap = new HashMap<String,String>();
try {
//Grab the cookies from the header and put them into a List
_CookieList = (List<Cookie>) Arrays.asList(CookieHelper.parseCookiesAsAServer(_CookieHeader.toString(),
new URI("" + message.getInboundProperty("host"))));
//And put them in a convenient List which can be accessed from the flow
message.setProperty("incomingCookieList", _CookieList, PropertyScope.SESSION);
//Let's also put them in a nice Map, since incoming cookies will
//usually only contain a name and a value, so let's get easy access to them by their name.
for (Cookie _Cookie : _CookieList){
_CookieMap.put(_Cookie.getName(), _Cookie.getValue());
}
message.setProperty("incomingCookieMap", _CookieMap, PropertyScope.SESSION);
} catch (URISyntaxException e) {
e.printStackTrace();
}
return message;
}
}
然后是这个流程示例，它显示了如何使用此代码 sn-p。 它包含一个设置一些 cookie 的侦听器，将其转发到“代理”，该代理将读取 cookie，但还将请求转发到另一个端点，使其成为透明代理，但在此过程中会读取 cookie。
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:json="http://www.mulesoft.org/schema/mule/json"
xmlns:tracking="http://www.mulesoft.org/schema/mule/ee/tracking"
xmlns:http="http://www.mulesoft.org/schema/mule/http"
xmlns="http://www.mulesoft.org/schema/mule/core"
xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
xmlns:spring="http://www.springframework.org/schema/beans"
version="EE-3.6.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.mulesoft.org/schema/mule/ee/tracking http://www.mulesoft.org/schema/mule/ee/tracking/current/mule-tracking-ee.xsd
http://www.mulesoft.org/schema/mule/json http://www.mulesoft.org/schema/mule/json/current/mule-json.xsd">
<custom-transformer class="transformers.CookieGrabber"
name="MyCookieTranformer"
doc:name="Java"/>
<http:listener-config name="HTTP_Configuration_CookieHandlerExample"
host="0.0.0.0"
port="8080"
doc:name="HTTP Listener Configuration"/>
<http:request-config name="HTTP_Request_Configuration"
host="localhost"
port="8080"
doc:name="HTTP Request Configuration"/>
<flow name="CookieSetterFlow">
<http:listener config-ref="HTTP_Configuration_CookieHandlerExample"
path="/setCookies/*"
doc:name="setCookies"
doc:description="Call this module by entering http://localhost:8080/setCookie"/>
<message-properties-transformer doc:name="Set the cookies"
doc:description="Set some random cookies in the header">
<add-message-property key="Cookie"
value="token=abcde; name=dennis"/>
</message-properties-transformer>
<http:request config-ref="HTTP_Request_Configuration"
path="/proxyCookie"
method="GET"
doc:name="call proxyCookies"
doc:description="Invoke the cookieReceiver with the cookies we've just set. Note the failure status code validator with a non-existing http code. It's a nasty bug, but it works like this...">
<http:failure-status-code-validator values="00000"/>
</http:request>
</flow>
<flow name="CookieProxyFlow">
<http:listener config-ref="HTTP_Configuration_CookieHandlerExample"
path="/proxyCookie"
doc:name="proxyCookies"
doc:description="This connector will proxy the cookieReceiver"/>
<transformer ref="MyCookieTranformer"
doc:name="GrabCookies"
doc:description="Use our custom transformers.CookieGrabber class to put the cookies in a nice java.util.List in a session variable."/>
<logger message="CookieProxy: Value of cookie "token": "#[sessionVars.incomingCookieMap.get('token')]"."
level="INFO"
doc:name="Have a cookie!"
doc:description="Let get a cookie value, simply by referring the name of it as the key from our map"/>
<flow-ref name="copy-and-clean-headers"
doc:name="copy-and-clean-headers"
doc:description="Cope the headers and clean the Mule stuff from the headers to forward it clean to the receiver."/>
<set-property propertyName="host"
value="localhost"
doc:name="Set Host"
doc:description="Now not really necessary, but you'll probably want to set the hostname to the actual service endpoint."/>
<http:request config-ref="HTTP_Request_Configuration"
path="/receiveCookie"
method="GET"
doc:name="forward to receiveCookies"
doc:description="Invoke the cookieReceiver.">
<http:failure-status-code-validator values="00000"/>
</http:request>
<flow-ref name="copy-and-clean-headers"
doc:name="copy-and-clean-headers"
doc:description="Again copy the headers and clean the Mule http stuff."/>
</flow>
<sub-flow name="copy-and-clean-headers" >
<copy-properties propertyName="*"
doc:name="Copy All HTTP Headers"/>
<remove-property propertyName="Content-Length"
doc:name="Remove Content Length"/>
<remove-property propertyName="MULE_*"
doc:name="Remove MULE Properties"/>
<remove-property propertyName="X_MULE*"
doc:name="Remove X_MULE Properties"/>
<remove-property propertyName="http.*"
doc:name="Remove http Properties"/>
</sub-flow>
<flow name="CookieReceiverFlow">
<http:listener config-ref="HTTP_Configuration_CookieHandlerExample"
path="/receiveCookie"
doc:name="receiveCookies"
doc:description="This connector receives the cookies we've just set"/>
<transformer ref="MyCookieTranformer"
doc:name="GrabCookies"
doc:description="Use our custom transformers.CookieGrabber class to put the cookies in a nice java.util.List in a session variable."/>
<logger message="CookieReceiver: Value of cookie "token": "#[sessionVars.incomingCookieMap.get('token')]". Yep, still there :)"
level="INFO"
doc:name="Have a cookie!"
doc:description="Let get a cookie value, simply by referring the name of it as the key from our map"/>
<set-payload value="#[sessionVars.incomingCookieList.toArray(String)]"
doc:name="Put CookieList to payload"
doc:description="Put the session vairable List that contains the cookies in the payload"/>
<json:object-to-json-transformer returnClass="java.lang.String"
doc:name="Object to JSON"
doc:description="Convert our payload to a JSON object"/>
</flow>
</mule>
你可以通过运行它并打开这个页面来测试它：http://localhost:8080/setCookies
希望这会有所帮助。
【讨论】：
您可以通过以下方式获取 cookie：
#[headers:INBOUND:cookie] or #[message.inboundProperties['cookie']]
【讨论】：