Help required HTTP POST implementation

[Raj2022]

I made a few apps using MIT AI. Thanks to the team.
I want to create a new channel in my Thingspeak account.
They recommend the below explained in (Create new channel with HTTP POST - MATLAB - MathWorks India)

POST https://api.thingspeak.com/channels.json
api_key=XXXXXXXXXXXXXXXX
name=My New Channel

expected response is as below with a new channel created on thingspeaks.
{
"id": 4,
"name": "My New Channel",
"description": null,
"metadata": null,
"latitude": null,
"longitude": null,
"created_at": "2014-03-25T13:12:50-04:00",
"elevation": null,
"last_entry_id": null,
"ranking": 15,
"username": "iothans",
"tags": [],
"api_keys":
[
{
"api_key": "XXXXXXXXXXXXXXXX",
"write_flag": true
}
]
}

after launching the app channel is not created and the responses on the app is

[Kevinkun]

you can not post a list, but try to post a string like aa=bb&cc=dd, or use a buildRequestData block

[Taifun]

Also you forgot to set the request header

Content-Type
application/x-www-form-urlencoded

Taifun

[Raj2022]

@Kevinkun

buildRequestData

But buildRequestData is a call so do I post the URL first?

[Taifun]

Here is an example App Inventor Tutorials and Examples: MySQL | Pura Vida Apps
Remove the Get method
EDIT: Add the Request header block

@Taifun

Content-Type
application/x-www-form-urlencoded

Use the Post method together with the BuildRequestData method as shown in the example
Taifun

[Raj2022]

Thank you Taifun and Kevinkun, I could create the channel successfully.
the blocks are as seen below. I still need your help in passing three more parameters.
name=My Channel (this is done with your help)
public_flag=true
field1=Stuff
field2=Things
field3=Data

These are working blocks for channel creation.

I tried this

and this but no success. ( creates a channel with the name " MyChannel1\nfield1=Stuff\nfield2=Things\nfield3=Data")

Please guide

[Kevinkun]

@Kevinkun

post a string like aa=bb&cc=dd

use & not \n

[Taifun]

The request header block needs a list of sublist, each of the sublists is a tag/value pair.. as it is working without being correct, you can omit that block

Also the BuildRequestData method needs a list of sublists, i.e.withoug the =

name
MyChannel1

field1
Stuff

field2
Things

field3
data

Taifun

[Raj2022]

@Raj2022

Thank you Taifun and Kevinkun,

Thank you Taifun and Kevinkun, I think my issues are addressed.
Below is the block I used for testing and it worked

[Kevinkun]

but your block is not correct for the RequestHeaders, it should be a list of list, as @Taifun mentioned in last post.
Did you got any error message?

[Raj2022]

This is in continuation of the below post

Help required HTTP POST implementation

Here is an example App Inventor Tutorials and Examples: MySQL | Pura Vida Apps Remove the Get method EDIT: Add the Request header block Use the Post method together with the BuildRequestData method as shown in the example Taifun

The result of above was & it is working

But I tried to modify the data as below

The system works but I get a message as

Please help to find the error.

[Juan_Antonio]

A few days ago we found an error in the SpreadSheet component with the join block. I don't know if the join with Web has the same error.

https://community.appinventor.mit.edu/t/testers-wanted-google-sheets-component/49195/58

Check to put the data in an Intermediate Label.

[Kevinkun]

header should be a list of list.
You need to add a 'make a list' block.

[Raj2022]

Tried the below blocks, same response with no success also the channel is not created.

[Taifun]

You misunderstood..
The request header must be a list of lists, I.e. 2 make a list blocks....
See again

Help required HTTP POST implementation

The request header block needs a list of sublist, each of the sublists is a tag/value pair.. as it is working without being correct, you can omit that block Also the BuildRequestData method needs a list of sublists, i.e.withoug the = name MyChannel1 field1 Stuff field2 Things field3 data Taifun

Taifun

[Raj2022]

Thanks Juan,
I tried as suggested by you.
But no change.

[Raj2022]

Dear Taifun,
if I change anything in request header the channel creation is not happing as per requirements.
We can only work with the PostText.

[Kevinkun]

do you know the meaning of 'list of list'?

or set the header as a Dictionary.