딱히 포맷을 가리진 않는다고 한다.
그래서 json을 보내던, plain text를 보내던 바이너리를 보내던
바이너리를 base64encode 하던 상관없나 보다.
[링크 : https://www.emqx.com/en/blog/how-to-process-json-hex-and-binary-data-in-mqtt]
귀찮으면(!) 파일을 그냥 던져도 되나보다.
| $ mosquitto_pub --help mosquitto_pub is a simple mqtt client that will publish a message on a single topic and exit. mosquitto_pub version 2.0.11 running on libmosquitto 2.0.11. Usage: mosquitto_pub {[-h host] [--unix path] [-p port] [-u username] [-P password] -t topic | -L URL} {-f file | -l | -n | -m message} [-c] [-k keepalive] [-q qos] [-r] [--repeat N] [--repeat-delay time] [-x session-expiry] [-A bind_address] [--nodelay] [-i id] [-I id_prefix] [-d] [--quiet] [-M max_inflight] [-u username [-P password]] [--will-topic [--will-payload payload] [--will-qos qos] [--will-retain]] [{--cafile file | --capath dir} [--cert file] [--key file] [--ciphers ciphers] [--insecure] [--tls-alpn protocol] [--tls-engine engine] [--keyform keyform] [--tls-engine-kpass-sha1]] [--tls-use-os-certs] [--psk hex-key --psk-identity identity [--ciphers ciphers]] [--proxy socks-url] [--property command identifier value] [-D command identifier value] mosquitto_pub --help -A : bind the outgoing socket to this host/ip address. Use to control which interface the client communicates over. -d : enable debug messages. -c : disable clean session/enable persistent client mode When this argument is used, the broker will be instructed not to clean existing sessions for the same client id when the client connects, and sessions will never expire when the client disconnects. MQTT v5 clients can change their session expiry interval with the -x argument. -D : Define MQTT v5 properties. See the documentation for more details. -f : send the contents of a file as the message. -h : mqtt host to connect to. Defaults to localhost. -i : id to use for this client. Defaults to mosquitto_pub_ appended with the process id. -I : define the client id as id_prefix appended with the process id. Useful for when the broker is using the clientid_prefixes option. -k : keep alive in seconds for this client. Defaults to 60. -L : specify user, password, hostname, port and topic as a URL in the form: mqtt(s)://[username[:password]@]host[:port]/topic -l : read messages from stdin, sending a separate message for each line. -m : message payload to send. -M : the maximum inflight messages for QoS 1/2.. -n : send a null (zero length) message. -p : network port to connect to. Defaults to 1883 for plain MQTT and 8883 for MQTT over TLS. -P : provide a password -q : quality of service level to use for all messages. Defaults to 0. -r : message should be retained. -s : read message from stdin, sending the entire input as a message. -t : mqtt topic to publish to. -u : provide a username -V : specify the version of the MQTT protocol to use when connecting. Can be mqttv5, mqttv311 or mqttv31. Defaults to mqttv311. -x : Set the session-expiry-interval property on the CONNECT packet. Applies to MQTT v5 clients only. Set to 0-4294967294 to specify the session will expire in that many seconds after the client disconnects, or use -1, 4294967295, or ∞ for a session that does not expire. Defaults to -1 if -c is also given, or 0 if -c not given. --help : display this message. --nodelay : disable Nagle's algorithm, to reduce socket sending latency at the possible expense of more packets being sent. --quiet : don't print error messages. --repeat : if publish mode is -f, -m, or -s, then repeat the publish N times. --repeat-delay : if using --repeat, wait time seconds between publishes. Defaults to 0. --unix : connect to a broker through a unix domain socket instead of a TCP socket, e.g. /tmp/mosquitto.sock --will-payload : payload for the client Will, which is sent by the broker in case of unexpected disconnection. If not given and will-topic is set, a zero length message will be sent. --will-qos : QoS level for the client Will. --will-retain : if given, make the client Will retained. --will-topic : the topic on which to publish the client Will. --cafile : path to a file containing trusted CA certificates to enable encrypted communication. --capath : path to a directory containing trusted CA certificates to enable encrypted communication. --cert : client certificate for authentication, if required by server. --key : client private key for authentication, if required by server. --keyform : keyfile type, can be either "pem" or "engine". --ciphers : openssl compatible list of TLS ciphers to support. --tls-version : TLS protocol version, can be one of tlsv1.3 tlsv1.2 or tlsv1.1. Defaults to tlsv1.2 if available. --insecure : do not check that the server certificate hostname matches the remote hostname. Using this option means that you cannot be sure that the remote host is the server you wish to connect to and so is insecure. Do not use this option in a production environment. --tls-engine : If set, enables the use of a TLS engine device. --tls-engine-kpass-sha1 : SHA1 of the key password to be used with the selected SSL engine. --tls-use-os-certs : Load and trust OS provided CA certificates. --psk : pre-shared-key in hexadecimal (no leading 0x) to enable TLS-PSK mode. --psk-identity : client identity string for TLS-PSK mode. --proxy : SOCKS5 proxy URL of the form: socks5h://[username[:password]@]hostname[:port] Only "none" and "username" authentication is supported. See https://mosquitto.org/ for more information. |
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