“msgpack” & “zlib” & “http” example

General
1

I would like to send a JSON package that gets “msgpack” and then compressed down using “zlib” down a post message to a server.

I tried to find examples online (here in the forum and on the internet) and could not find one.

I appreciate any advice on how to get a simple example running!

Thanks.

[{"id":"1ffa7fc1.97d7f","type":"msgpack","z":"b0e8c135.b7fa5","name":"","x":640,"y":360,"wires":[["8c50397.47b5dc8","d36df86c.c3f438"]]},{"id":"dc1720e6.2f7c1","type":"debug","z":"b0e8c135.b7fa5","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":850,"y":320,"wires":[]},{"id":"8c50397.47b5dc8","type":"function","z":"b0e8c135.b7fa5","name":"zlib (?)","func":"//https://stackoverflow.com/questions/33488690/node-red-access-to-zlib\n\ncontext.global.zlib.gunzip(msg.payload, function(err, buffer){\n    \n    if (!err)\n    \n        { \n            console.log(\"*** ZLIB WORKING ***\")\n            node.send( { payload: buffer.toString() });\n        }\n\n    else { console.log(\"***ERROR HANDLER ZLIB***\") } }); \n    \nreturn msg;","outputs":1,"noerr":0,"x":830,"y":360,"wires":[["dc1720e6.2f7c1","7fc0db56.a563b4"]]},{"id":"7fc0db56.a563b4","type":"http request","z":"b0e8c135.b7fa5","name":"SAMPLES","method":"POST","ret":"obj","paytoqs":false,"url":"localhost:1881","tls":"","proxy":"","x":1050,"y":360,"wires":[["930b0948.4e45e8"]]},{"id":"ff9018c0.4b46e8","type":"inject","z":"b0e8c135.b7fa5","name":"","topic":"","payload":"{\"who\":\"me\",\"what\":\"help\"}","payloadType":"json","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":490,"y":360,"wires":[["1ffa7fc1.97d7f"]]},{"id":"930b0948.4e45e8","type":"debug","z":"b0e8c135.b7fa5","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":1050,"y":320,"wires":[]},{"id":"d36df86c.c3f438","type":"debug","z":"b0e8c135.b7fa5","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":650,"y":320,"wires":[]}]

Update:

  • I added some "code" that I believe works, but would really like a second/third set of eyes to make sure I am doing the correct thing here!
  • To test I create a simple TCP server to catch the response by: :~$ nc -l -p 1881

Thanks!

2

You appear to have used two non-standard nodes but have not told us what they are (presumable node-red-contrib-something) so it is difficult to be certain, but on the principle you appear to have found nodes to do the pack and the compression it is difficult to see how your flow could be improved on. Assuming it does what you want that is.