public void Intercept(IInvocation invocation)
{
var client = new RestClient(_baseUrl);
client.Timeout = int.Parse(ConfigurationManager.AppSettings[CLINET_REST_TIMEOUT]);
var methodInfo = invocation.Method;
var route = methodInfo.GetCustomAttributes <RouteAttribute>().First().Template;
var method = GetHttpMethod(methodInfo);
var restRequest = new RestRequest(route, method);
// adds "Token" to header
var url = _baseUrl + route;
if (!IsLogin(url) && !IsExchangeRates(url) && !IsRegister(url) && !IsRegisterPending(url) && !IsAnonymous(url))
{
restRequest.AddHeader(TOKEN_HEADER, _token.GetToken());
}
// adds "Accept-Language" to header
string uiLanguage = Thread.CurrentThread.CurrentUICulture.Name;
if (uiLanguage.Equals(SPANISH_LANGUAGE))
{
restRequest.AddHeader(ACCEPT_LANGUAGE_HEADER, uiLanguage);
}
else
{
restRequest.AddHeader(ACCEPT_LANGUAGE_HEADER, ENGLISH_LANGUAGE);
}
// adds client ip address to header.
restRequest.AddHeader(CLIENT_IP_ADDRESS, HttpContext.Current.Request.UserHostAddress);
// adds validation code to heander.
SetValidationCode(restRequest);
// adds j1kpme4dvag1dt0tmjbx0oeh to ASP.NET_SessionId cookie. POS backend's session id will be hardcoded.
restRequest.AddCookie(ASP_NET_SESSION_ID, HttpContext.Current.Session.SessionID);
var parameters = methodInfo.GetParameters();
// handles the segment parameters in url, i.e. {controller}/{id}, the id is a segment parameter
var segmentCount = route.Count(c => c == '{');
for (var i = 0; i < segmentCount; i++)
{
restRequest.AddUrlSegment(parameters[i].Name, invocation.Arguments[i].ToString());
}
// handles the parameters except segment parameters
for (var i = segmentCount; i < parameters.Count(); i++)
{
var parameter = parameters[i];
var argument = invocation.Arguments[i];
var argumentType = argument.GetType();
if ((argumentType.IsPrimitive || argumentType.IsValueType || argumentType == typeof(string)))
{
AddSimpleParameter(restRequest, parameter, argument, argumentType);
}
else if (argumentType.IsArray)
{
AddArrayParameter(restRequest, parameter, argument, argumentType);
}
else
{
AddObjectParameter(restRequest, parameter, argument, argumentType);
}
}
var methodName = methodInfo.ReflectedType.FullName + "." + methodInfo.Name;
_loggerHelper.LogWebRequest(methodName, LogWebRequestState.Request, LogWebRequestType.Exec);
// handles the response
var response = client.Execute(restRequest);
_loggerHelper.LogWebRequest(methodName, LogWebRequestState.Completed, LogWebRequestType.Exec);
int responseCode = (int)response.StatusCode;
if (responseCode == 200)
{
var returnValue = JsonConvert.DeserializeObject(response.Content, methodInfo.ReturnType, _jsonSerializerSettings);
invocation.ReturnValue = returnValue;
}
else if (responseCode != 204)
{
if (string.IsNullOrEmpty(response.Content))
{
_loggerHelper.LogWebRequest(methodName, LogWebRequestState.Error, LogWebRequestType.Exec, response.ErrorMessage);
throw new Exception(response.ErrorMessage);
}
else
{
_loggerHelper.LogWebRequest(methodName, LogWebRequestState.Error, LogWebRequestType.Exec, response.Content);
throw new WebException(response.Content);
}
}
else
{
if (string.IsNullOrEmpty(response.Content))
{
_loggerHelper.LogWebRequest(methodName, LogWebRequestState.Error, LogWebRequestType.Exec, response.ErrorMessage);
}
else
{
_loggerHelper.LogWebRequest(methodName, LogWebRequestState.Error, LogWebRequestType.Exec, response.Content);
}
}
}
