http::message::content

Set or clear the Content-Length field.

void
content_length(
    boost::optional< std::uint64_t > const& value);

This function adjusts the Content-Length field as follows:

If value specifies a value, the Content-Length field is set to the value. Otherwise
The Content-Length field is erased.

If "chunked" token appears as the last item in the Transfer-Encoding field it is unconditionally removed.

Name	Description
`value`	The value to set for Content-Length.