HTTPBuilder set request contenttype - json

Question

I am using the following code to execute a HTTP POST towards an external system. The problem is that the external system always gets a 'null' content type when using the code below. Is there a way to set the contenttype when using HTTPBuilder.
I tried other tools that execute the same request but then the remote system gets a good contentType ('application/json').
def execute(String baseUrl, String path, Map requestHeaders=[:], Map query=[:], method = Method.POST) {
try {
def http = new HTTPBuilder(baseUrl)
def result = null
// perform a ${method} request, expecting TEXT response
http.request(method, ContentType.JSON) {
uri.path = path
uri.query = query
// add possible headers
requestHeaders.each { key, value ->
headers."${key}" = "${value}"
}
// response handler for a success response code
response.success = { resp, reader ->
result = reader.getText()
}
}
return result
} catch (groovyx.net.http.HttpResponseException ex) {
ex.printStackTrace()
return null
} catch (java.net.ConnectException ex) {
ex.printStackTrace()
return null
}
}

Answer 1

Adding a specific header to the request seems to solve my problem.
def execute(String baseUrl, String path, Map requestHeaders=[:], Map query=[:], method = Method.POST) {
try {
def http = new HTTPBuilder(baseUrl)
def result = null
// perform a ${method} request, expecting TEXT response
http.request(method, ContentType.JSON) {
uri.path = path
uri.query = query
headers.'Content-Type' = 'application/json'
// add possible headers
requestHeaders.each { key, value ->
headers."${key}" = "${value}"
}
// response handler for a success response code
response.success = { resp, reader ->
result = reader.getText()
}
}
return result
} catch (groovyx.net.http.HttpResponseException ex) {
ex.printStackTrace()
return null
} catch (java.net.ConnectException ex) {
ex.printStackTrace()
return null
}
}

Answer 2

Try setting the requestContentType in the body of your request block...
http.request(method, ContentType.JSON) {
uri.path = path
uri.query = query
requestContentType = groovyx.net.http.ContentType.URLENC
.......
}