Separate request/4,5,6 into headers/4,5 and request/5,6

This cleaner separation gets rid of the implicit body check
that was causing issues for many users. Now the body is
either given explicitly or it is expected via future
gun:data/3 calls.

1 files changed, 4 insertions, 12 deletions

diff --git a/doc/src/manual/gun.request.asciidoc b/doc/src/manual/gun.request.asciidoc
index ec169ac..f5c1cd8 100644
--- a/doc/src/manual/gun.request.asciidoc
+++ b/doc/src/manual/gun.request.asciidoc
@@ -8,9 +8,6 @@ gun:request - Perform the given request
 
 [source,erlang]
 ----
-request(ConnPid, Method, Path, Headers)
-    -> StreamRef
-
 request(ConnPid, Method, Path, Headers, Body)
     -> request(ConnPid, Method, Path, Headers, Body, #{})
 
@@ -31,15 +28,6 @@ Perform the given request.
 This is a general purpose function that should only be
 used when other method-specific functions do not apply.
 
-The behavior of this function varies depending on whether
-a body is provided.
-
-The function `request/4` expects either a content-length
-or content-type header to indicate that a body will be
-sent afterwards. Gun will assume the request has no body
-otherwise. The body can then be sent using
-link:man:gun:data(3)[gun:data(3)].
-
 The function `request/5,6` sends the entire request, including
 the request body, immediately. It is therefore not possible
 to use link:man:gun:data(3)[gun:data(3)] after that. You
@@ -81,6 +69,9 @@ to this new stream.
 
 == Changelog
 
+* *2.0*: Implicit body detection has been removed. The body
+         must now be provided either directly (even if empty)
+         or using link:man:gun:headers(3)[gun:headers(3)].
 * *1.0*: Function introduced.
 
 == Examples
@@ -97,6 +88,7 @@ StreamRef = gun:request(ConnPid, <<"PUT">>,
 == See also
 
 link:man:gun(3)[gun(3)],
+link:man:gun:headers(3)[gun:headers(3)],
 link:man:gun:await(3)[gun:await(3)],
 link:man:gun:await_body(3)[gun:await_body(3)],
 link:man:gun_push(3)[gun_push(3)],