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matope.mayamiko
PostPosted: Mon Jan 20, 2020 12:38 am Post subject: Access POST parameters in compute node Reply with quote

Newbie

Joined: 20 Jan 2020
Posts: 3

Hello

I'm quite new to IBM IIB and I'm trying to develop a REST service that can be consumed by other services. I have done most of the work but my question is on the compute node. I am able to access values that I pass to the service using GET with the code below

Code:
SET myValue = InputLocalEnvironment.REST.Input.Parameters.myValue;


What I want to know is how can I access values that I send to the service using HTTP POST. I tried with the same code above but it does not work
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timber
PostPosted: Mon Jan 20, 2020 1:02 am Post subject: Reply with quote

Grand Master

Joined: 25 Aug 2015
Posts: 1141

Are these 'values that you send to the service' supplied in
a) query parameters in the URL or
b) fields in the JSON body?

If b), then you need to access the message body in the usual way:
Code:

DECLARE myParam1 CHAR = InputBody.JSON.Data.path.to.your.field;
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matope.mayamiko
PostPosted: Mon Jan 20, 2020 1:23 am Post subject: Reply with quote

Newbie

Joined: 20 Jan 2020
Posts: 3

I am passing the values as HTTP POST parameter. below is a sample raw request

Code:
POST /localhost/myServiceHTTP/1.1
Host: localhost
Content-Type: application/x-www-form-urlencoded
Content-Length: 158

Test=928361283&Amount=1000.00
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timber
PostPosted: Mon Jan 20, 2020 3:21 am Post subject: Reply with quote

Grand Master

Joined: 25 Aug 2015
Posts: 1141

Quote:
I am passing the values as HTTP POST parameter
That does not answer my question. There are multiple ways to pass POST parameters.
Code:
Content-Type: application/x-www-form-urlencoded
That does answer the question, though. You are sending the parameters as x-www-form-urlencoded.

IIB does not automatically decode x-www-form-urlencoded params. You should proceed as follows:
- Insert a Trace node immediately after the HTTP node
- Set the Pattern property of the Trace node to ${Root}
- Put a message through the flow, then look carefully at the tree structure in the Trace node output.
- Write ESQL to extract the parameters from the incoming message.
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matope.mayamiko
PostPosted: Tue Jan 21, 2020 2:17 am Post subject: Reply with quote

Newbie

Joined: 20 Jan 2020
Posts: 3

Thanks, I put a trace node and realised that content type of application/x-www-form-urlencoded was being passed as a BLOB. I just had to cast the blob back to a string and now I can read the parameters
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