IOS getting response null in http request - ios

Question

I'm sending a request to a server to test a specific situation. The response is a custom 510 http error and the content is the info of the error.
The web service works fine the first time a send the request. The next time I tried to replicate the error the response is nil. But, if I change the request avoiding the error, it works fine and the response is what it is supposed to be.
I'm executing the request with a brand new object each time.
#interface SCBaseConnection()
#property (strong, nonatomic) NSURLSessionDownloadTask *task;
#end
#implementation SCBaseConnection
- (instancetype) initWithUrl:(NSString *)url
path:(NSString *)path
body:(NSString *)body
headers:(NSDictionary *)headers
method:(NSString *)method
requestCode:(NSInteger)requestCode
{
self = [super init];
NSLog(#"%#", headers);
NSURL *uri = [NSURL URLWithString:[NSString stringWithFormat:#"%#%#", url, path]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:uri];
request.HTTPMethod = method;
if (body) {
request.HTTPBody = [body dataUsingEncoding:NSUTF8StringEncoding];
}
if (headers) {
NSArray *keys = [headers allKeys];
for (NSString *key in keys) {
[request setValue:[headers objectForKey:key] forHTTPHeaderField:key];
}
}
NSURLSession *session = [NSURLSession sessionWithConfiguration: [NSURLSessionConfiguration defaultSessionConfiguration]];
self.task = [session downloadTaskWithRequest:request completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {
int statusCode = (int)[response getStatusCode];
NSLog(#"%#", #(statusCode));
if (HTTP_UNAUTHORIZED == statusCode) {
[[NSNotificationCenter defaultCenter] postNotificationName:kUnauthorizedHttpRequest object:response];
}
if (error) {
[MCMGeneralUtils logError:error];
NSLog(#"%#", error.userInfo);
NSLog(#"%#", error);
}
NSData *res = [self dataFromFile:location];
dispatch_async(dispatch_get_main_queue(), ^{
[self.delegate didConnectionFinished:self
statusCode:statusCode
response:res
requestPath:path
requestCode:requestCode];
});
}];
return self;
}
This is the content of the error.userInfo after the second request.
NSErrorFailingURLKey = "http://192.168.1.201:23111/api/paciente";
NSErrorFailingURLStringKey = "http://192.168.1.201:2311/api/paciente";
NSLocalizedDescription = "The requested URL was not found on this server.";
The first time the request has no errors.
UPDATE
- (IBAction)save:(UIBarButtonItem *)sender
{
MCMPatientNew *patient = [MCMPatientNew new];
patient.name = self.name;
patient.lastname = self.lastname;
patient.fullname = [NSString stringWithFormat:#"%# %#", self.name, self.lastname];
patient.email = self.email;
patient.phones = [self extracPhones];
patient.patientNew = YES;
NSError *error = nil;
if ([patient assertPatient:&error]) {
MCMUser *user = [MCMUser loadUserInManagedContext:self.managedContext];
patient.delegate = self;
[patient storePatientInManagedContext:self.managedContext];
if ([MCMGeneralUtils isInternetRechable]) {
[self presentViewController:self.serverConnectionAlert animated:YES completion:nil];
[patient postPatientWithToken:user.token doctorId:user.userId];
} else {
[self storeInRequestLogWithRequestCode:REQUEST_CODE_PACIENTE_INSERT
appId:patient.appId
ready:YES
inManagedContext:self.managedContext];
[self cancel:nil];
[self postNotificationWithObject:patient];
}
} else {
[self displayErrorMessageWithErrorInfo:error.userInfo];
}
}
UPDATE 2
- (void)postPatientWithToken:(NSString *)accessToken doctorId:(NSNumber *)doctorId
{
NSMutableDictionary *mutable = [NSMutableDictionary dictionaryWithDictionary:[self jsonToPost]];
[mutable setObject:doctorId forKey:#"doctorId"];
NSDictionary *body = #{#"obj" : mutable};
[self connectToServerWithAccessToken:accessToken
body:body
path:PATH_PACIENTE_INSERT
method:HTTP_METHOD_POST
requestCode:REQUEST_CODE_PACIENTE_INSERT
delegate:self];
}
-
- (void)connectToServerWithAccessToken:(NSString *)accessToken
body:(NSDictionary *)body
path:(NSString *)path
method:(NSString *)method
requestCode:(NSInteger)requestCode
delegate:(id<SCBaseConnectionDelegate>)delegate
{
NSString *authenticator = [NSString stringWithFormat:#"Bearer %#", accessToken];
NSDictionary *headers = #{HEADER_CONTENT_TYPE : CONTENT_TYPE_APPLICATION_JSON,
HEADER_AUTHORIZATION : authenticator};
NSString *bodyStr = body ? [SCJson jsonFromDictionary:body] : #"";
SCBaseConnection *connection = [[SCBaseConnection alloc] initWithUrl:API_URL
path:path
body:bodyStr
headers:headers
method:method
requestCode:requestCode];
connection.delegate = delegate;
[connection execute];
}
-
- (BOOL)execute
{
if (self.task) {
[self.task resume];
return YES;
}
return NO;
}