htparse is written by Mark Ellzey and part of libevhtp.
https://github.com/ellzey/libevhtp

The included code are modified by me for bugfixes.
See my fork:
https://github.com/tatsuhiro-t/libevhtp/tree/master/htparse

The default log level is now WARNING.

Put libhtparse in examples/htparse

This option sets maximum receive buffer size for incoming control
frame.  Basically the library checks the length field of the incoming
control frame. For frames with name/value header block, the library
also checks the length of inflated block is also under the limit. This
is done while incrementally inflating block. If the length of frames
with name/value header block exceeds the limit, the library will issue
RST_STREAM with FRAME_TOO_LARGE. For other frames, it will issue
GOAWAY.

Current SPDY/3 spec does not clearly prohibit to send
delta_window_size which makes resulting window size more than initial
window size. For this reason, spdylay_submit_window_update() can send
delta_window_size in [1, (1 << 31)-1], inclusive, without bounded by
stream's recv_window_size. Of course, the application is now
responsible to keep the resulting window size <= (1 << 31)-1.

spdylay_submit_window_update() now returns
SPDYLAY_ERR_INVALID_ARGUMENT if delta_window_size is 0 or negative.