Not able to extract response dynamic header value from target response

Google Cloud Apigee
1

from target response header I am getting the variable named “Tr-ui” from the target. But I am not able to extract that variable using the extract variable policy. Value of that variable will be JSON.

Below is the configuration. But I am not able to see the extra header in trace itself

response {extraHeaderValue} targetHeader true

2

Can you please post your trace?

Are you able to see the header in the backend response variable?

3

yes I am able to see in target response. But it is not showing in extract policy output. In extract variable policy, under the variables section NOTHING Is showing. i mean the targetHeader.extraHeaderValue

4

I am also having the same issue, could you please share how you fix this issue.

5

You can directly try the variable as response.header.Tr-ui

Please check this.

6

My requirement is to extract the content-range from the response header, from the target i recevied as below

keep-alive 569 count 1-1/1 application/json;charset=UTF-8 Tue, 20 Oct 2020 22:17:04 GMT nginx max-age=15768000; includeSubDomains 10160b61-080c-4c00-6aa4-622b1884f36a

i tried below in the assign policy.

{response.header.content-range}

I tried with extract variable also,

{content-range} true response

but both are not working.

7

You have to extract using extract variable policy xpath not using header.

Your source will be the header, and using xpath XML extraction you have to extract the value.

8

could you please help with the Xpath and extract variable syntex is correct or not

/ResponseMessage/Headers/*/{content-range}

Input Header:

Header name=“Connection”>keep-alive

569 count 1-1/1 application/json;charset=UTF-8 Tue, 20 Oct 2020 22:17:04 GMT
9

use the below code and you will get the value you want in the variable content-range. It should be attached in the response.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ExtractVariables async="false" continueOnError="false" enabled="true" name="Extract-Variables-1">
    <DisplayName>Extract Variables-1</DisplayName>
    <Properties/>
    <IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
    <Source clearPayload="false">response</Source>
    <XMLPayload stopPayloadProcessing="false">
        <Namespaces/>
        <Variable name="content-range">
            <XPath>//ResponseMessage/Headers/Header[3]</XPath>
        </Variable>
    </XMLPayload>
</ExtractVariables>