NATS command line utility
$ natscat
natscat [messages...]
Options:
--version Show version number [boolean]
----nats, -n nats url
----subject, -j subjects
----subscribe, -s subscribe [boolean]
----publish, -p publish [boolean]
----request, -r request [boolean]
----file, -f input json or yaml file
--help Show help [boolean]
subscribe to subject
# subscribe
$ natscat -sc test.subject
2019-04-26 10:10:11.524 subscribed to test.subject
2019-04-26 10:10:33.095 <=== hello natscat test.subject publish message to subject
# publish
$ natscat -pc test.subject "hello natscat"
2019-04-26 10:10:33.098 ===> hello natscat test.subjectsubscribe and reply
# subscribe & reply
$ natscat -sc test.subject "you too"
2019-04-26 10:13:18.921 subscribed to test.subject
2019-04-26 10:13:25.564 <=== hello natscat test.subject
2019-04-26 10:13:25.568 ===> you too _INBOX.IN62QEIRU5TYT3Q0UEERN5.IN62QEIRU5TYT3Q0UEERR7 request
# request
$ natscat -rc test.subject "hello natscat"
2019-04-26 10:13:24.896 ===> hello natscat test.subject
2019-04-26 10:13:25.569 <=== you too test.subjectsend multiple message to multiple subject
$ natscat -p -j test.subject1 -j test.subject2 message1 message2
2019-04-26 10:21:28.977 ===> message1 test.subject1
2019-04-26 10:21:29.655 ===> message1 test.subject2
2019-04-26 10:21:29.656 ===> message2 test.subject1
2019-04-26 10:21:29.658 ===> message2 test.subject2send json messages from yaml/json file
$ cat > messages.yaml <<EOF
first: message
---
{"second": "message"}
EOF
$ natscat -pj test.subject -f message.yaml
2019-04-26 10:24:08.861 ===> {"first":"message"} test.subject
2019-04-26 10:24:09.526 ===> {"second":"message"} test.subjectspecify nats server
$ export NATS=127.0.0.1:4222
$ natscat -pj test.subject hello
2019-04-26 10:34:08.515 connecting to nats 127.0.0.1:4222
2019-04-26 10:34:09.194 ===> hello test.subject
$ natscat -n nats:4222 -pj test.subject hello
2019-04-26 10:35:08.893 connecting to nats nats:4222
2019-04-26 10:35:09.558 ===> hello test.subject
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