Rails backend is struggling to receive Crossrider ajax post requests with JSON payload

I am encountering an issue where my attempts to post a JSON object to a remote server (Rails) are failing. The POST parameters seem to be converted to a url-encoded string instead of being sent as 'application/json'. Here is an example of what I am trying to do:

appAPI.request.post({
  url: "http://mybackend",
  postData: {hello: 'world', foo: 'bar'},
  onSuccess: function(response) {
    console.log("postback succeeded with response: " + response)
  },
  onFailure: function(httpCode) {
    console.log("postback failure: " + httpCode)
  },
  contentType: 'application/json'
});

However, this results in an HTTP 500 error with the server complaining about a malformed JSON object:

Error occurred while parsing request parameters.
Contents:

MultiJson::LoadError (784: unexpected token at 'hello=world&foo=bar'): 
  /Users/hammady/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/json/common.rb:148:in `parse'
  ...

I need help in figuring out how to successfully send the JSON object to my Rails backend without it being converted to a url-encoded string.

Answer №1

The initial step is to convert the object into a string.

dataToSend: JSON.stringify({name: 'John', age: 30});

Answer №2

For converting the data into a string, it is recommended to utilize the JSON.stringify function.

appAPI.request.post({
  url: "http://mybackend",
  postData: JSON.stringify({name: 'John', age: 30}),
  onSuccess: function(response) {
    console.log("Successful post request with response: " + response)
  },
  onFailure: function(httpCode) {
    console.log("Post request failed with HTTP code: " + httpCode)
  },
  contentType: 'application/json'
});

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