# $http.post表单提交的问题

// Use x-www-form-urlencoded Content-Type 
$httpProvider.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded;charset=utf-8';
/** 
 * * The workhorse; converts an object to x-www-form-urlencoded serialization. 
 * * @param {Object} obj * @return {String} 
 * */
var param = function (obj) {
      var query = '',
            name, value, fullSubName, subName, subValue, innerObj, i;
      for (name in obj) {
            value = obj[name];
            if (value instanceof Array) {
                  for (i = 0; i < value.length; ++i) {
                        subValue = value[i];
                        fullSubName = name + '[' + i + ']';
                        innerObj = {};
                        innerObj[fullSubName] = subValue;
                        query += param(innerObj) + '&';
                  }
            } else if (value instanceof Object) {
                  for (subName in value) {
                        subValue = value[subName];
                        fullSubName = name + '[' + subName + ']';
                        innerObj = {};
                        innerObj[fullSubName] = subValue;
                        query += param(innerObj) + '&';
                  }
            } else if (value !== undefined && value !== null) query += encodeURIComponent(name) + '=' + encodeURIComponent(value) + '&';
      }
      return query.length ? query.substr(0, query.length - 1) : query;
};
// Override $http service's default transformRequest 
$httpProvider.defaults.transformRequest = [function (data) {
      return angular.isObject(data) && String(data) !== '[object File]' ? param(data) : data;
}];