plugin for Backbone that send the models as application/json encoded bodies

BackboneSyncJSON.js

    methodMap = {
      'create': 'POST',
      'update': 'PUT',
      'delete': 'DELETE',
      'read': 'GET'
    };
    getUrl = function(object) {
      if (!(object && object.url)) {
        throw new Error("A 'url' property or function must be specified");
      } else {
        return _.isFunction(object.url) ? object.url() : object.url;
      }
    };
    return (Backbone.sync = function(method, model, success, error) {
      var data, sendModel, type;
      type = methodMap[method];
      sendModel = method === "create" || method === "update";
      data = sendModel ? JSON.stringify(model) : {};
      if (Backbone.emulateHttp && (type === 'PUT' || type === 'DELETE')) {
        data._method = type;
        type = 'POST';
      }
      return $.ajax({
        url: getUrl(model),
        type: type,
        contentType: "application/json",
        processData: false,
        data: data,
        dataType: 'json',
        success: success,
        error: error
      });
    });