Azure Machine Learning REST API: no body - rest

Question

I am simply strying to call the REST API end point of a machine learning experiment created with Azure. I keep getting this error message:
{
"error": {
"code": "BadArgument",
"message": "Invalid argument provided.",
"details": [
{
"code": "RequestBodyInvalid",
"message": "No request body provided or error in deserializing the request body."
}
]
}
}
I have looked it up on their documentation: https://learn.microsoft.com/en-us/azure/machine-learning/machine-learning-web-service-error-codes
All it says is that my bod is empty, I am not sure how can it be empty, here is my code:
router.post('/rating/new', function(req, res) {
var postData = {
"Inputs": {
"input2":
[
{
'Col1': "A11",
'Col2': "6",
'Col3': "A34",
'Col4': "A43",
'Col5': "1169",
'Col6': "A65",
'Col7': "A75",
'Col8': "4",
'Col9': "A93",
'Col10': "A101",
'Col11': "4",
'Col12': "A121",
'Col13': "67",
'Col14': "A143",
'Col15': "A152",
'Col16': "2",
'Col17': "A173",
'Col18': "1",
'Col19': "A192",
'Col20': "A201",
'Col21': "1",
}
],
},
"GlobalParameters": {
}
};
// Configure the request
var options = {
url: config.ML_PREDICTIVE.url,
method: 'POST',
headers: {
'Content-Type':'application/json',
'Authorization':('Bearer ' + config.ML_PREDICTIVE.apiKey)},
form: postData
}
console.log(JSON.stringify(options));
// Start the request
request.post(options, function (error, response, body) {
if(error){
res.status(403).send(error);
}
if(response.statusCode != 200){
res.status(403).send(response.body);
}
if (!error && response.statusCode == 200) {
console.log(body)
}
})
});
The only thing I see that could go wrong is that "form" in the request is not considered body by azure, I have tried with "body" as well no success.
Please help !

Answer 1

According to the code you provided, the variable postData is not valid JSON string. You'd need to use JSON.stringify() method to convert postData value to a JSON string before you send a POST request.