HI, I trying to make a REST API call to external Application from Cloud page, But getting 500 internal error

Question

I trying to make a REST API POST request to an external Application from the Cloud page But getting 500 internal error. Can you please help me out with this on what mistake I'm doing

%%[
    set @uname = "Harish"
    set @pwd = "Password"
    set @auth = Concat(@uname, @pwd)
    set @url = "https://endpointurl.com"
    
    set @payload = '{
        "addSeminarCustomerInputField":{
            "seminarCustomerField":{
                "additionalAttendeesField":0,
                "confirmedField":true,
                "customer_IDField":1170, 
                "isHandicappedField":false,
                "isHearingImpairedField":false,
                "isVisionImpairedField":false,
                "notesField":"Test Notes",
                "seminar_IDField":3
            }
        }
    }'
     
      SET @req = HTTPPost2(@url, "application/json", @payload, false, @response, "Authorization", @auth)
      
      
     ]%%
    
    Res = %%=v(@response)=%%

Postman code:

curl --location --request POST 'https://endpointurl.com' \
--header 'Authorization: Basic Q0JDX0FQSTpjYmNhcGkyMDIw' \
--header 'Content-Type: application/json' \
--header 'Cookie: ASP.NET_SessionId=on4xa3ow4hta45lipltm5x0w' \
--data-raw '{
    "addSeminarCustomerInputField":{
        "seminarCustomerField":{
            "additionalAttendeesField":0,
            "confirmedField":true,
            "customer_IDField":1170,
            "isHandicappedField":false,
            "isHearingImpairedField":false,
            "isVisionImpairedField":false,
            "notesField":"Test Notes",
            "seminar_IDField":3
        }
    }
}'

Answer 1

I believe the issue is because in your HTTPPost2 function itself. Based on the documentation the parameters are as followed:

Please pay attention to parameter 5 and 6 in your code:

SET @req = HTTPPost2(@url, "application/json",  @payload, false, "Authorization", @auth,  @response)

You have moved your @response variable to #7 The correct way would be:

SET @req = HTTPPost2(@url, "application/json",  @payload, false, @response, "Authorization", @auth)

---

Edit:

My code example was missing parameter 6 as I have described above:

SET @req = HTTPPost2(@url, "application/json",  @payload, false, @response, @responseRowSet, "Authorization", @auth)

ResponseRowSet need to be set as parameter 6 not your first header value.

Also, you should review Authentication vs Authorization. If you stick with Authorization please have a read at here

You may want to change your @auth variable to:

set @auth = Concat('Basic ',Base64Encode(Concat(@uname,':',@pwd)))