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net/http: Server's http.Request strips Transfer-Encoding header #11675

solderjs opened this issue Jul 11, 2015 · 1 comment


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commented Jul 11, 2015

Probably a low-priority issue. Not a big deal, just a little confusing.

Also, I'm well-aware that browsers don't send with Transfer-Encoding: chunked, but there are clients that can.

Perhaps this is intentional, but if so, I didn't see it in the documentation.

Here's a little demo code

func (m *myHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
  for k, v := range r.Header {
    fmt.Println(k, v)

  fmt.Fprintf(w, "Hi there, I love %s!", r.URL.Path[1:])
# curl can send it
http://localhost/pizza -X POST -H "Transfer-Encoding: chunked" -d 'foo=bar&baz=grault' -vv

# the server doesn't show it
User-Agent [curl/7.37.1]
Accept [*/*]
Content-Type [application/x-www-form-urlencoded]
&{0xc20807c300 0xc208032340 0xc20805c240 false {0 0} false}
# yet other headers show up as expected
http://localhost/pizza -X POST -H "X-Transfer-Encoding: chunked" -d 'foo=bar&baz=grault' -vv

# server shows this
X-Transfer-Encoding [chunked]
Content-Length [18]
Content-Type [application/x-www-form-urlencoded]
User-Agent [curl/7.37.1]
Accept [*/*]
&{0xc2080aa700 <nil> <nil> false {0 0} false}

@bradfitz bradfitz changed the title Server's http.Request strips Transfer-Encoding header net/http: Server's http.Request strips Transfer-Encoding header Jul 14, 2015


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commented Jul 22, 2015


Go does this intentionally: it handles decoding the transfer-encoding, so by the time the body arrives at ServeHTTP the handler should not care at all. I believe this is working as intended.

Do you need the Transfer-Encoding for some reason?

@rsc rsc closed this Aug 6, 2015

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