The client key and id is currently supplied in a cookie. This
provides a way for a client to determine it's id in order to match
it within the state response. However if cookies are disabled or
the source domain differs from the ustreamer domain the cookie will
not be set.
This provides an alternate way for a client to find the state
response associated with it's connection by including the client
provided key in the state response. If the client does not supply
a key, the value 0 is supplied.
Signed-off-by: Russ Dill <russ.dill@gmail.com>
evbuffer_add_file takes ownership for the file descriptor we pass
and manages closing it. Closing it ourselves will lead to the function
only being able to make very small transfers.
Signed-off-by: Russ Dill <russ.dill@gmail.com>
On Raspberry Pi OS Bullseye:
```sh
$ make WITH_OMX=1
[...]
== LD ustreamer.bin
/usr/bin/ld: warning: libbrcmGLESv2.so, needed by /opt/vc/lib/libopenmaxil.so, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: libbrcmEGL.so, needed by /opt/vc/lib/libopenmaxil.so, not found (try using -rpath or -rpath-link)
[...]
$ ./ustreamer --features
./ustreamer: error while loading shared libraries: libopenmaxil.so: cannot open shared object file: No such file or directory
$ LD_LIBRARY_PATH=/opt/vc/lib/ ./ustreamer --features
+ WITH_OMX
- WITH_GPIO
+ WITH_PTHREAD_NP
+ WITH_SETPROCTITLE
+ HAS_PDEATHSIG
```
This change documents a gotcha that can occur when clients deploy uStreamer behind an nginx proxy. By default, nginx buffers responses, which introduces latency into the video stream. Disabling the buffer eliminates this latency.
