diff options
Diffstat (limited to 'doc/src/guide/req_body.asciidoc')
| -rw-r--r-- | doc/src/guide/req_body.asciidoc | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/doc/src/guide/req_body.asciidoc b/doc/src/guide/req_body.asciidoc index 4906811..88389f6 100644 --- a/doc/src/guide/req_body.asciidoc +++ b/doc/src/guide/req_body.asciidoc @@ -74,17 +74,33 @@ only up to 1MB for up to 5 seconds: #{length => 1000000, period => 5000}). ---- -You may also disable the length limit: +These two options can effectively be used to control +the rate of transmission of the request body. + +It is also possible to asynchronously read the request +body using auto mode: [source,erlang] -{ok, Data, Req} = cowboy_req:read_body(Req0, #{length => infinity}). +---- +Ref = make_ref(), +cowboy_req:cast({read_body, self(), Ref, auto, infinity}, Req). +---- -This makes the function wait 15 seconds and return with -whatever arrived during that period. This is not -recommended for public facing applications. +Cowboy will wait indefinitely for data and then send a +`request_body` message as soon as it has data available, +regardless of length. -These two options can effectively be used to control -the rate of transmission of the request body. +[source,erlang] +---- +receive + {request_body, Ref, nofin, Data} -> + do_something(Data); + {request_body, Ref, fin, _BodyLen, Data} -> + do_something(Data) +end. +---- + +Asynchronous reading of data pairs well with loop handlers. === Streaming the body |