Send SMS twilio by postman through wso2 - wso2

Question

I want to Send SMS twilio by postman through Wso2 ESB , the body , to and from parameters submitted through postman to wso2 sequence , I'm trying to do it by payloadFactory but it does not work , it said :
<TwilioResponse>
<RestException>
<Code>21602</Code>
<Message>Message body is required.</Message>
<MoreInfo>https://www.twilio.com/docs/errors/21602</MoreInfo>
<Status>400</Status>
</RestException>
I'm using https://api.twilio.com/2010-04-01/Accounts/AC*****************/Messages
as endpoint to send it to Twilio
my sequence :
<property expression="json-eval($.Body)" name="Body" scope="default"
type="STRING" xmlns:ns="http://org.apache.synapse/xsd"/>
<property expression="json-eval($.To)" name="To" scope="default"
type="STRING" xmlns:ns="http://org.apache.synapse/xsd"/>
<property expression="json-eval($.From)" name="From" scope="default"
type="STRING" xmlns:ns="http://org.apache.synapse/xsd"/>
<payloadFactory media-type="json">
<format> { "Body": $1, "From": $2 ,"To": $3 } </format>
<args>
<arg evaluator="xml" expression="get-property('Body')"
literal="false" xmlns:ns="http://org.apache.synapse/xsd"/>
<arg evaluator="xml" expression="get-property('From')"
literal="false" xmlns:ns="http://org.apache.synapse/xsd"/>
<arg evaluator="xml" expression="get-property('To')"
literal="false" xmlns:ns="http://org.apache.synapse/xsd"/>
</args>
</payloadFactory>
<call>
<endpoint key="twill2"/>
</call>
<send/>
and my postman request :
{
"Body":"hi dear",
"To":"+(***) *******",
"From":"+1 *******"
}

Answer 1

We have observed that in some cases even though the body is present in the request endpoints returning this error. This is due to the additional headers present or absence of some headers. Can you please try adding the following properties prior to the endpoint call
<property action="remove" name="TRANSPORT_HEADERS" scope="axis2"/>
<property name="setCharacterEncoding" scope="axis2" value="false"/>
<property name="DISABLE_CHUNKING" scope="axis2" value="true"/>
<property name="ContentType" scope="axis2" value="application/json"/>
You can refer to the documentation 1, [2], [3], [4] for additional details on the above properties.
1-https://docs.wso2.com/display/EI660/Generic+Properties#GenericProperties-TRANSPORT_HEADERS
[2]-https://docs.wso2.com/display/EI6xx/Axis2+Properties#Axis2Properties-setCharacterEncoding
[3]-https://docs.wso2.com/display/EI660/HTTP+Transport+Properties#HTTPTransportProperties-DISABLE_CHUNKINGDISABLE_CHUNKING
[4]-https://docs.wso2.com/display/EI660/Generic+Properties#GenericProperties-ContentType
Updated
Can you enable wire in ESB server and attach logs when you invoke the endpoint directly. Refer to the blog [5] on enabling wire logs. Also please attach the curl command of the postman request. You can obtain this by selecting the code button in postman and selecting curl.
[5]-http://lakshanigamage.blogspot.com/2015/03/how-to-enable-wire-logs-in-wso2-esbapim.html