header.go
func (h *RequestHeader) SetContentLength(contentLength int) {
	h.parseRawHeaders()
	h.contentLength = contentLength
	if contentLength >= 0 {
		h.contentLengthBytes = AppendUint(h.contentLengthBytes[:0], contentLength)
		h.h = delAllArgsBytes(h.h, strTransferEncoding)
	} else {
		h.contentLengthBytes = h.contentLengthBytes[:0]
		h.h = setArgBytes(h.h, strTransferEncoding, strChunked, argsHasValue)
	}
}
func (h *RequestHeader) SetContentLength(contentLength int) {
	h.parseRawHeaders()
	h.contentLength = contentLength
	if contentLength >= 0 {
		h.contentLengthBytes = AppendUint(h.contentLengthBytes[:0], contentLength)
		h.h = delAllArgsBytes(h.h, strTransferEncoding)
	} else {
		h.contentLengthBytes = h.contentLengthBytes[:0]
		h.h = setArgBytes(h.h, strTransferEncoding, strChunked, argsHasValue)
	}
}
func ( h * RequestHeader ) SetContentLength ( contentLength int ) { h . parseRawHeaders ( ) h . contentLength = contentLength if contentLength >= 0 { h . contentLengthBytes = AppendUint ( h . contentLengthBytes [ : 0 ] , contentLength ) h . h = delAllArgsBytes ( h . h , strTransferEncoding ) } else { h . contentLengthBytes = h . contentLengthBytes [ : 0 ] h . h = setArgBytes ( h . h , strTransferEncoding , strChunked , argsHasValue ) } }
// SetContentLength sets Content-Length header value.
//
// Negative content-length sets 'Transfer-Encoding: chunked' header.
SetContentLength sets Content - Length header value . Negative content - length sets Transfer - Encoding : chunked header .