How to send a query parameter containing == statement in Integration Studio? - wso2

Question

In Integration Studio, I am working on generating a new API by taking the query parameter from outside and sending it to an API that runs the query parameter as follows. The query structure of the endpoint I call works as follows.
Integration Studio Call http endpoint:
http://localhost:8080/Energy?q=year>2019;month==1
WSO2 Integration Studio Generated API
http://localhost:8290/Energy/Test?q=year>2019;month==1
This is how I will send the query parameter (year>2019;month==1) that I will get from outside. But it does not accept == character.
I can get the part up to the == statement in the Query parameter, but not the == and beyond.
Below is my sample xml work.
Example Xml:
<?xml version="1.0" encoding="UTF-8"?>
<api context="/Energy" name="Energy" xmlns="http://ws.apache.org/ns/synapse">
<resource methods="GET" url-mapping="/Test">
<inSequence>
<property expression="$url:q" name="uri.var.ep.q" scope="default"
type="STRING"/>
<log>
<property expression="$url:q" name="QueryParameter"/>
</log>
<call>
<endpoint>
<http method="get" uri-template="http://localhost:8080/Energy?q==
{uri.var.ep.q}">
<suspendOnFailure>
<initialDuration>-1</initialDuration>
<progressionFactor>-1</progressionFactor>
<maximumDuration>0</maximumDuration>
</suspendOnFailure>
<markForSuspension>
<retriesBeforeSuspension>0</retriesBeforeSuspension>
</markForSuspension>
</http>
</endpoint>
</call>
<script language="js"><![CDATA[var data = mc.getPayloadJSON();
mc.setPayloadJSON(JSON.stringify(data));]]></script>
<property name="messageType" scope="axis2" type="STRING"
value="application/json"/>
<jsontransform description="convert to json">
<property name="synapse.commons.json.output.autoPrimitive" value="true"/>
<property name="synapse.commons.enableXmlNullForEmptyElement"
value="false"/>
</jsontransform>
<respond/>
</inSequence>
<outSequence/>
<faultSequence/>
</resource>
</api>

Answer 1

Some characters are reserved when it comes to URI construction. For example according to RFC2396 and RFC3986 following characters are reserved and you are not able to use them as values in query parameters, path parameters, or in the URI itself.
reserved = ";" | "/" | "?" | ":" | "#" | "&" | "=" | "+" |
"$" | ","
If you want to use these special characters you need to use URL encoding to encode the special characters, there are online tools for encoding as well.
In your case, you can use the following URL when calling the API which will allow you to extract the query parameters properly.
http://localhost:8080/Energy?q=year%3E2019%3Bmonth%3D%3D1