Cannot Read JSON request body parameters in wso2 ESB as an api - json

Question

I have created an API in the WSO2 ESB (4.8.1) and I wanted to send a PUT request to that API with a request body. I have tried with the sample
and I wanted to log a property values in the insequence of the defined API.
This is my request body:
This is the way how I tried to log the location name:
But I’m getting an error like this:
(ERROR - SynapseJsonPath #stringValueOf. Error evaluating JSON Path . Returning empty result. Error>>> invalid path)
So how can I read these values?

Answer 1

To achieve your requirement, you should send the "Content-Type" HTTP header with the request like below,
"Content-Type : application/json"
enter image description here
Then you can log the specific JSON element like below.
<log>
<property name="location" expression="json-eval($.coordinates.location[0].name)"></property>
</log>
Then you can see following log,
enter image description here
Thanks.

Answer 2

If you want to get single variable from user in json request you can use this code
Use This json:
{
"namee":"UsmanYaqooooooooooob"
}
Api Code:
<api xmlns="http://ws.apache.org/ns/synapse" name="Hello" context="/hello">
<resource methods="POST" uri-template="/post">
<inSequence>
<log level="custom">
<property name="===========inSequence" value="****"></property>
<property name="locationsssssssss" expression="json-eval(.namee)"></property>
</log>
<payloadFactory media-type="json">
<format>{"hello":"world"}</format>
<args></args>
</payloadFactory>
<property name="messageType" value="text/xml"></property>
<respond></respond>
</inSequence>
</resource>
</api>