Empty reply from server - creating an HTTP Endpoint

General
1

I am trying to create an HTTP Endpoint using the description provided here: https://cookbook.nodered.org/http/create-an-http-endpoint
Using the example code together with the mentioned curl-command I get the reply "curl: (52) Empty reply from server".
I am using a Debian operated local system an I have installed node-red using the description provided here: https://nodered.org/docs/getting-started/raspberrypi
What am I doing wrong?
Many thanks!

2

Difficult to say without more info...

  • Share your flow
  • Share your curl command

NOTE: Please wrap code in a code fence to avoid forum formatting making flow/curl command unusable.
```
like this, between back ticks
```

3

I am using 1:1 the example provided here: https://cookbook.nodered.org/http/create-an-http-endpoint

Flow: [ { "id": "8fb7704d922a7884", "type": "tab", "label": "Flow 1", "disabled": false, "info": "", "env": [] }, { "id": "59ff2a1.fa600d4", "type": "http in", "z": "8fb7704d922a7884", "name": "", "url": "/hello", "method": "get", "swaggerDoc": "", "x": 100, "y": 180, "wires": [ [ "54c1e70d.ab3e18" ] ] }, { "id": "54c1e70d.ab3e18", "type": "template", "z": "8fb7704d922a7884", "name": "page", "field": "payload", "fieldType": "msg", "format": "handlebars", "syntax": "mustache", "template": "<html>\n <head></head>\n <body>\n <h1>Hello World!</h1>\n </body>\n</html>", "x": 250, "y": 180, "wires": [ [ "266c286f.d993d8" ] ] }, { "id": "266c286f.d993d8", "type": "http response", "z": "8fb7704d922a7884", "name": "", "x": 390, "y": 180, "wires": [] } ]

URL command: root@nodered:~# curl http://localhost:1880/hello curl: (52) Empty reply from server root@nodered:~#

4

What you have posted works perfectly fine for me...

image

image

Question...

  • Why are you running curl as root user?
  • Are you using the node-red-start command to start node-red
    • in other words, what user is running node-red? If you used the installer script, then it would be installed as PI or the user you initially ran the script as.
5

Many thanks for your help!

No special reason for this. Simply because I log on to the machine via SSH as root@...

I have installed Node-Red as root and as described here: Running on Raspberry Pi : Node-RED (nodered.org)
I run Node-Red as a service and I have enabled Autostart on boot as described in the above document with the following command: sudo systemctl enable nodered.service

6

I have tried now not to start node-red as a service but to start manually as root: Same result.
I also have tried to change port 1880 to 80 in the settings file: Same result too.
Where else can I look? I am very grateful for any help!

7

The problem seems to be in the settings for https: As soon as I specify a "key" and a "cert" under "https", the Node-Red server only accepts https connections, even if I set "requireHttps" to "false".
Is this the way it should be?

8

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