Amazon Gateway API with Lambda - Could not parse request body into json - api

Question

I seem to be getting a issue with Amazon Gateway API not liking my sent params for example.
$.ajax({
url: "https://tibqwxuqoh.execute-api.us-east-1.amazonaws.com/dev/getitems",
type: "POST",
data: {
"device": "test",
"datetime": "1446757400919"
},
success: function (returnhtml) {
console.log(returnhtml);
$("#result").append("DOES NOT WORK - <br>" + JSON.stringify(returnhtml));
}
});
$.ajax({
url: "https://tibqwxuqoh.execute-api.us-east-1.amazonaws.com/dev/getitems",
type: "POST",
data: {},
success: function (returnhtml) {
console.log(returnhtml);
$("#result").append("<br>WORKS ???? - <br>" + JSON.stringify(returnhtml));
}
});
Here is a working example.
http://jsfiddle.net/Uwcuz/4315/
Can someone let me know why it wont let me send params every time i add a parameter i get this error.
{
Type = User;
message = "Could not parse request body into json.";
}
OK THIS WORKS BUT SEEMS A BIT WEIRD TO ME.
$.ajax({
url: "https://tibqwxuqoh.execute-api.us-east-1.amazonaws.com/dev/getitems",
type: "POST",
data: "{\"device\": \"test\",\"datetime\": \"1446757444524\"}",
success: function (returnhtml) {
console.log(returnhtml);
$("#result").append("WORKS - <br>" + JSON.stringify(returnhtml));
}
});

Answer 1

The problem lies in how you send the data to API Gateway.
Without knowing the details of your API configuration I am guessing that you have a Request Mapping setup for application/json.
jQuery will by default post your data as application/x-www-form-urlencoded but you want to send it as json.
You can do this without having to fiddle too much with the data yourself:
var requestParams = {
url: "https://tibqwxuqoh.execute-api.us-east-1.amazonaws.com/dev/getitems",
method: "POST,
contentType: "application/json",
dataType: "json",
data: JSON.stringify({
"device": "test",
"datetime": "1446757400919"
});
};
var request = $.ajax(requestParams);
The key here is JSON.stringify() and telling jQuery that the dataType is json as well as setting the contentType to application/json.