Sending POST request in ESB mule

Question

I try to send the post request to API using ESB mule. Hence i have created flow like this.

<?xml version="1.0" encoding="UTF-8"?>

<mule xmlns:json="http://www.mulesoft.org/schema/mule/json" 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" 
    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/json http://www.mulesoft.org/schema/mule/json/current/mule-json.xsd">
    <http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8110" doc:name="HTTP Listener Configuration"/>
    <http:request-config name="HTTP_Request_Configuration" protocol="HTTPS" host="api.bonanza.com" port="443" doc:name="HTTP Request Configuration"/>
    <flow name="bonanza_fetchtoken_ceFlow">
        <http:listener config-ref="HTTP_Listener_Configuration" path="/fetchtoken" allowedMethods="GET" doc:name="HTTP"/>
        <message-properties-transformer doc:name="Message Properties">
            <add-message-property key="X-BONANZLE-API-DEV-NAME" value="t*****I"/>
            <add-message-property key="X-BONANZLE-API-CERT-NAME" value="l*****F"/>
        </message-properties-transformer>
        <set-payload value="fetchTokenRequest" doc:name="Set Payload"/>
        <set-property propertyName="Content-Type" value="application/json" doc:name="Property"/>
        <json:object-to-json-transformer doc:name="Object to JSON"/>
        <http:request config-ref="HTTP_Request_Configuration" path="/api_requests/secure_request" method="POST" doc:name="HTTP">
            <http:success-status-code-validator values="0..599"/>
        </http:request>
    </flow>
</mule>

In the API documentation, they have provided the sample code for java to send and receive response and it is working in my local too. The java code snippet is below.

import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.HttpURLConnection;

public class FetchToken {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        try {
            String devId = "t******I";
            String certId = "l*******F";

            URL url = new URL("https://api.bonanza.com/api_requests/secure_request");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            connection.setRequestMethod("POST");
            connection.setDoOutput(true);
            connection.setRequestProperty("Accept", "application/json");
            connection.setRequestProperty("X-BONANZLE-API-DEV-NAME", devId);
            connection.setRequestProperty("X-BONANZLE-API-CERT-NAME", certId);

            OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());

            String requestName = "fetchTokenRequest";

            writer.write(requestName);
            writer.flush();
            writer.close();

            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String response = in.readLine();

            JSONObject jsonResponse = new JSONObject(response);

            if (jsonResponse.optString("ack").equals("Success") 
                    && jsonResponse.optJSONObject("fetchTokenResponse") != null) {
                // Success! Now read more keys from the json object
                JSONObject fetchTokenJson = jsonResponse.optJSONObject("fetchTokenResponse");

                System.out.println("Your token: " + fetchTokenJson.optString("authToken"));
                System.out.println("Token expiration time: " + fetchTokenJson.optString("hardExpirationTime"));
                System.out.println("Authentication URL: " + fetchTokenJson.optString("authenticationURL"));
            }


        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

I am not java expertise. How they are sending post payload (fetchTokenRequest) in Java in the above sample. How can i send same payload in the mule ESB.

If it is stream post payload, how can i send stream post payload in ESB mule ?

Answer 1

In your sample, whatever payload your http listener is listening to will be your payload for post request. To use a different payload, use <set-payload doc:name="Set Payload" value="your_value"/> before outbound http.

Set Content-Type to application/json After set-payload , use <json:object-to-json-transformer/>