Categories
asp.net-web-api c# json mongodb

how to post arbitrary json object to webapi

How do I / is it possible to pass in a json object to a webapi controller (POST) and not have a class to map it to, but rather handle it as arbitrary content?

So if I pass in from my client like so:

        createRecord: function (model, data, callback, callbackParams) {
var request = jQuery.ajax({
type: "POST", // default = GET,
url: '/api/' + model + '/',
data: data,
contentType: 'application/json',
success: function (msg) {
$('#results').text(msg);
if (callback) // only fire a callback if it has been specified
callback(msg, callbackParams);
},
error: function (jqXHR, textStatus) {
alert('Request failed: ' + textStatus);
}
});
}

and data is something like:

{ "_id" : ObjectId("5069f825cd4c1d590cddf206"), "firstName" : "John", "lastName" : "Smith", "city" : "Vancouver", "country" : "Canada" }

My controller will be able to parse it? And next time the data may not match that signature (eg:

{ "_id" : ObjectId("5069f825cd4c1d56677xz6"), "company" : "Acme" }

In my controller, I have tried:

public HttpResponseMessage Post([FromBody]JObject value)

and:

public HttpResponseMessage Post([FromBody]string value)

and (because this is actually to work with a mongo db):

public HttpResponseMessage Post([FromBody]BsonDocument value)

but it looks like the object mapper wants to map to something other than string…

You can have your post method that takes in a HttpRequestMessage to by pass the model binding logic and you can read the content of the request directly:

    public HttpResponseMessage Post(HttpRequestMessage req)
{
var data = req.Content.ReadAsStringAsync().Result; // using .Result here for simplicity...
...
}

By the way, the reason why the action that takes in JObject doesn’t work is because of ‘ObjectId(“…”)’ that is used as the value of “_id” in your data…