waiting for response, token extraction

Wi-Fi password: 12345678

## Access

Live stream: rtsp://192.168.42.1/live

# Shoot

Photo download: http://192.168.42.1:50422/20190417/IMG_20190417_164229.JPG

Control (JSON): TCP 192.168.42.1:7878

## Shoot

	./shoot.sh

{ for f in commands/*; do cat "$f"; sleep 4; done } | nc 192.168.42.1 7878

#!/bin/bash

#HOSTNAME="192.168.42.1"

HOSTNAME="localhost"

PORT="7878"

set -e # fail on error

#set -x # print executed commanads

set -u # fail on invalid variable

set -o pipefail # fail if any command in pipeline fails

# create FIFOs if missing

[ -p data_to_camera ] || mkfifo data_to_camera

#{ for f in commands/*; do cat "$f"; sleep 4; done } | nc 192.168.42.1 7878

#{

#	for i in $(seq 1 110); do

#		echo -n '{"rval":0,"msg_id":257,"param":2}{"rval":0,"msg_id":261,"param":"b6291d832eb3cbd92c724f32437e95c3","update":0}' | cut -c $i

#		sleep 0.05;

#	done

#	

#} | {

get_JSON() {

	while read -n1 char; do

		#echo -n $char >&2

		RESPONSE="$RESPONSE$char"

		# find the end of the response (assuming non-balanced brackets do not appear e.g. inside strings) ... (proper JSON parsing would be needed)

		if [ "$char" == '{' ]; then

			OPEN_BRACKETS=$(expr $OPEN_BRACKETS + 1 || true)

		elif [ "$char" == '}' ]; then

			OPEN_BRACKETS=$(expr $OPEN_BRACKETS - 1 || true)

			if [ $OPEN_BRACKETS -eq 0 ]; then

				echo "Received JSON: $RESPONSE" >&2

				# TODO: assert contains '"rval":0'

				echo "$RESPONSE"

				RESPONSE=''

				break

			fi

		fi

	done

}

commander() {

	RESPONSE=''

	OPEN_BRACKETS=0

	# 01 Request a token/session id

	echo '{"msg_id":257,"token":0}'

	TOKEN="$(get_JSON | sed 's/.*"param":\([0-9][0-9]*\).*/\1/')"

	# TODO: assert is numeric

	# 02 something ???

	echo '{"msg_id":4097,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 03 Get config

	echo '{"msg_id":1539,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 04 maybe start streaming ???

	echo '{"param":"192.168.42.3","type":"TCP","msg_id":261,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 05 Get camera settings

	echo '{"msg_id":4365,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 06 set time and shoot

	echo '{"param":"2019-04-17-16-42-19-3","msg_id":6147,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 07 get sd status

	echo '{"msg_id":4358,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 08 get info

	echo '{"msg_id":4364,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 09 set path

	echo '{"param":"/tmp/SD0/DCIM/","msg_id":1283,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 10 get files

	echo '{"param":"/tmp/SD0/DCIM/","msg_id":1283,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 11 set path 2

	echo '{"param":"/tmp/SD0/DCIM/20150101/","msg_id":1283,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 12 get files

	echo '{"msg_id":1282,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 13 set path

	echo '{"param":"/tmp/SD0/DCIM/20190417/","msg_id":1283,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 14 get files

	echo '{"msg_id":1282,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 15 get status

	echo '{"msg_id":4864,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 16 give me and maybe shoot

	echo '{"param":"/tmp/SD0/DCIM/20190417/IMG_20190417_164229.JPG","msg_id":1026,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 17 give me or generate thumbnail

	echo '{"param":"/tmp/SD0/DCIM/20190417/IMG_20190417_164229.JPG","type":"thumb","msg_id":1025,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 18 ???

	echo '{"msg_id":6154,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

	# 19 ???

	echo '{"msg_id":6154,"token":'$TOKEN'}'

	DUMMY="$(get_JSON)"

}

# Do it...

nc -v "$HOSTNAME" "$PORT" 0<data_to_camera | commander 1>data_to_camera  || (

	# TODO: handle known errors? (e.g. connection refused)

	echo Error $?; false

)

echo "Yee!"