Http Request to send data

[perico]

Hello,

I need to send data in a specific format via http, like this: http://192.168.X.X/apienergia/funcions.php?funcio=updateComptadorGET&tag=X&valor=X&datahora=X , where tag, valor and datahora are the variables that I need to send.

I'm doing what you can see in the image, and as you can see it doesn't send correctly (msg.payload : string [0])

Somebody knows which could be the problem?

Thank you,
Roger.

[UnborN]

Hello .. the problem is not very clear .. so you get a reply back as an empty string ?
it all depends on your device's documentation .. do you have a link ?

also have you tried in the Function node (just before your http-request)

let tag = msg.payload.deveuil;
let valor = msg.payload.Comptador;
let datahora = msg.payload.DataHora;

msg.url = `http://192.168.X.X/apienergia/funcions.php?funcio=updateComptadorGET&tag=${tag}&valor=${valor}&datahora=${datahora}`
msg.method = "POST"

return msg;

ps. in the test, clear the url from the http-request node since we are sending it from the function

[perico]

Hello UnborN,

Yes, I have an empty string. All that I need to do is reply this http://192.168.X.X/apienergia/funcions.php?funcio=updateComptadorGET&tag=X&valor=X&datahora=X with my data.

I put like what you explain but it happens the same because it doesn't detect the variables.

Thank you,
Roger.

[UnborN]

@perico

it doesn't detect the variables

Do you have any Documenation for the device ?

[perico]

It is an api with this code:

I don't know anything else because it's from other teammate.

Thank you,
Roger.

[UnborN]

dont know php but that function tries to get the url parameters and if funcio is updateComptador

BUT you are sending?funcio=updateComptadorGET&tag=X ..
maybe that extra GET in updateComptadorGET is the problem ?

try .. ?funcio=updateComptador&tag=X ..

[EDIT]

Something to try

let tag = msg.payload.deveuil;
let valor = msg.payload.Comptador;
let datahora = msg.payload.DataHora;

msg.url = `http://192.168.X.X/apienergia/funcions.php?funcio=updateComptador`
msg.method = "POST"
msg.headers = { "Content-type": "application/x-www-form-urlencoded" }

msg.payload = { "tag": tag, "valor": valor, "datahora": datahora }

return msg;

[perico]

I'm trying and trying so many options but I can achieve it. With your function UnborN now I have the next:

Any more idea on how I can send this data to this API rest with Node-RED, I don't know what else to do.

Very gratefull,
Roger.

[UnborN]

You have to study the PHP code and see what it does
a quick search for $_POST

An associative array of variables passed to the current script via the HTTP POST method when using application/x-www-form-urlencoded or multipart/form-data as the HTTP Content-Type in the request.

We tried urlencoded .. try multipart/form-data
im not sure of the syntax but there is an example at the end of the http-request node's help tab.

maybe ..

let tag = msg.payload.deveuil;
let valor = msg.payload.Comptador;
let datahora = msg.payload.DataHora;

msg.url = `http://192.168.X.X/apienergia/funcions.php?funcio=updateComptador`
msg.method = "POST"
msg.headers = { "Content-type": "multipart/form-data" }

msg.payload = {
    "tag": { "value": tag },
    "valor": { "value": valor },
    "datahora": { "value": datahora }
}

return msg;

ps1. also check why it returns a 404 .. do you have the IP and url correct ?
ps2. are you sure its a POST request .. maybe its method is GET ?
it not common and usually request that send data are POST but worth to try.

[perico]

Good morning,

Thanks for all your help UnborN, so sorry, the developer jnow says me that I need to to a GET.

[Steve-Mcl]

As far as i can see from your earlier post,

@perico

http://192.168.X.X/apienergia/funcions.php?funcio=updateComptadorGET&tag=X&valor=X&datahora=X with my data.

and your PHP screenshot...

@perico

... you simply need to create a URL with query parameters.

let tag = msg.payload.deveuil;
let valor = msg.payload.Comptador;
let datahora = msg.payload.DataHora;

msg.url = `http://192.168.X.X/apienergia/funcions.php?funcio=updateComptador&tag=${tag}&valor=${valor}&datahora=${datahora}`
msg.method = "GET"

//Should be no harm including values in payload...
msg.payload = { "tag": tag, "valor": valor, "datahora": datahora }
//... but you can probably delete the above line if needed

return msg;

Send the output of the function to a HTTP Request node (leave the URL field blank so that it is populated by the value generated in msg.url

Also, send the output of the function to a debug node (set to show complete msg) and show us what you get in the debug sidebar.

[perico]

Hello Steve,

By one hand:

By the other hand:

[Steve-Mcl]

You didn't use the code I wrote. It still has GET in the middle. And, the code for the url string is a regular string '' instead of a template string ``

[Steve-Mcl]

Also, can you put a debug BEFORE the function so we can see what is in msg.payload.

[perico]

Sorry Steve, I have little knowledge programing and I thinked that it was the same. Now it's working well but with the "GET" in the middle.

I attach de solution if it's usefull for somebody.

Many thanks Steve and UnborN for all your help.

[UnborN]

@perico

Now it's working well but with the "GET" in the middle.

I dont think its working because of GET in the url .. ?funcio=updateComptadorGET ..
you get a reply statusCode 200 because the msg.method is "GET"

but have you confirmed that the PHP executed as it should ?
the php code you shared says if funcio === "updateComptador"
so if you have in url .. ?funcio=updateComptadorGET .. i wonder if it executes