There are three handler that need to be patched all at once with the
server itself being marked with set_content_streaming
For two simple handler just get the content string with
read_entire_stream_contiguous helper. This is what httpd server did
anyway.
The "start_restore" handler used the contiguous contents to parse json
from using rjson utility. This handler is patched to use
read_entire_stream() that returns a vector of temporary buffers. The
rjson parser has a helper to pars from that vector, so the change is
also optimization.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
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