func (t *Transport) getBodyWriterState(cs *clientStream, body io.Reader) (s bodyWriterState) {
s.cs = cs
if body == nil {
return
}
resc := make(chan error, 1)
s.resc = resc
s.fn = func() {
resc <- cs.writeRequestBody(body, cs.req.Body)
}
s.delay = t.expectContinueTimeout()
if s.delay == 0 ||
!httplex.HeaderValuesContainsToken(
cs.req.Header["Expect"],
"100-continue") {
return
}
s.fnonce = new(sync.Once)
// Arm the timer with a very large duration, which we'll
// intentionally lower later. It has to be large now because
// we need a handle to it before writing the headers, but the
// s.delay value is defined to not start until after the
// request headers were written.
const hugeDuration = 365 * 24 * time.Hour
s.timer = time.AfterFunc(hugeDuration, func() {
s.fnonce.Do(s.fn)
})
return
}
// Determine whether to hang up after sending a request and body, or
// receiving a response and body
// 'header' is the request headers
func shouldClose(major, minor int, header Header, removeCloseHeader bool) bool {
if major < 1 {
return true
}
conv := header["Connection"]
hasClose := httplex.HeaderValuesContainsToken(conv, "close")
if major == 1 && minor == 0 {
return hasClose || !httplex.HeaderValuesContainsToken(conv, "keep-alive")
}
if hasClose && removeCloseHeader {
header.Del("Connection")
}
return hasClose
}