wiremock request matching from key=value pair - wiremock

Question

I am using json mapping to match the request. The request coming as content-type application/x-www-form-urlencoded which means as a Key=value pair and the value contains xml data. For example:
REQUEST=<?xml version="1.0" encoding="UTF-8"?>
<n:request xmlns:n="schema uri" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="schema location">
<header userId="userId" password="password" requesterId="123" version="100" language="de">
<product>xxx</product>
</header>
<subject>
<party externalIdentifier="1">
<address externalIdentifier="11">
<person>
<firstName>rinku</firstName>
<lastName>chy</lastName>
<birthDate>1973-12-10</birthDate>
</person>
<street>street</street>
<number>12</number>
<countryCode>de</countryCode>
<zipCode>123</zipCode>
<city>city</city>
</address>
</party>
</subject>
</n:request>
The purpose is to find the product name and the person's name. I have tried both xpath as well as query parameters expression to match the request as stated in http://wiremock.org/docs/request-matching/. But couldn't manage to get a solution yet.For example
{
"request": {
"method": "POST",
"urlPattern": "/mock.*",
"queryParameters": {
"product": {
"matches": "xxx"
}
},
// tried both seperately
"bodyPatterns": [
{
"matchesXPath": "//*[local-name()='request']/*[local-name()='header']/*[local-name()='product'][text()='xxx']"
}
]
},
"response": {
"status": 200,
"bodyFileName": "response.xml",
"headers": {
"Content-Type": "text/xml; charset=UTF-8",
"Content-Location": "response.xml"
}
}
}
Always getting the same error "[WireMock] (qtp2017957857-34) Warning: failed to parse the XML document. Reason: Content is not allowed in prolog.
Can anyone have a clue how to match such a request?

Answer 1

I found the solution. There is an option to intercept and modify requests. Visit -> http://wiremock.org/docs/extending-wiremock/ in the section "Intercepting and modifying requests".
public class RequestFilter extends StubRequestFilter {
#Override
public RequestFilterAction filter(Request request) {
// removed "REQUEST=" from request body
Request modifyRequest = RequestWrapper.create()
.transformBody(requestBody -> Body.fromOneOf(null, requestBody.asString().substring(8)), null, null))
.wrap(request);
return RequestFilterAction.continueWith(modifyRequest);
}
#Override
public String getName() {
return "my-request-filter";
}}