I'm currently building an MvcEndpoint in a SpringBoot Application to return the result of an Http GET call to another service. This service returns a JSON content, which has the header Transfer-Encoding valued to "chunked".
My endpoint is then consumed by a Node.js server. This Node.js server returns a parse error with code HPE_UNEXPECTED_CONTENT_LENGTH when consuming the endpoint, because the response headers contains both Transfer-encoding:chunked and Content-Length values.
This is considered has an error as specified in RFC 7230 section 126.96.36.199 :
??If a message is received with both a Transfer-Encoding and a Content-Length header field, the Transfer-Encoding overrides the Content-Length. Such a message might indicate an attempt to perform request smuggling (Section 9.5) or response splitting (Section 9.4) and ought to be handled as an error. A sender MUST remove the received Content-Length field prior to forwarding such a message downstream.??