Function sanitizeJsonpCallbackParam

test/angular/1.7/angular.js:13386–13408

(url, cbKey)

    }

    function sanitizeJsonpCallbackParam(url, cbKey) {
      var parts = url.split('?');
      if (parts.length > 2) {
        // Throw if the url contains more than one `?` query indicator
        throw $httpMinErr('badjsonp', 'Illegal use more than one "?", in url, "{1}"', url);
      }
      var params = parseKeyValue(parts[1]);
      forEach(params, function(value, key) {
        if (value === 'JSON_CALLBACK') {
          // Throw if the url already contains a reference to JSON_CALLBACK
          throw $httpMinErr('badjsonp', 'Illegal use of JSON_CALLBACK in url, "{0}"', url);
        }
        if (key === cbKey) {
          // Throw if the callback param was already provided
          throw $httpMinErr('badjsonp', 'Illegal use of callback param, "{0}", in url, "{1}"', cbKey, url);
        }
      });

      // Add in the JSON_CALLBACK callback param value
      url += ((url.indexOf('?') === -1) ? '?' : '&') + cbKey + '=JSON_CALLBACK';

      return url;
    }
  }];
}