Getting server error message while parsing json using NSURLConnection in Objective C - objective-c

Question

[
{
"CouponQtn":1,
"DeliveryDist":14,
"Sizes":"not selected",
"CustomerAlternateMobile":"01700790900",
"deliveryCharge":0,
"DealId":744706,
"PaymentType":"MPD",
"OrderFrom":"ios",
"CardType":"Manual",
"OrderSource":"app",
"CustomerId":630142,
"MerchantId":15196,
"AdvPaymentType":0,
"CustomerBillingAddress":"Khulna",
"CustomerMobile":"01700790900",
"Color":"",
"AdvPayPhoneId":0,
"OrderCouponPrice":375
}
]
This is my json format populated from the app and I am sending it to server in a post method to get a desired json result. But the server is providing me an unknown error. But it is working in Postman as well
Here I convert my array of dictionary to json
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:orderArray
options:kNilOptions
error:nil];
NSString*jsonStr = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
//NSString* jsonStr = [NSString stringWithUTF8String:[jsonData bytes]];
tempDic = [apiCom getNodeDataByPOST:CART_ORDER_URL parameter:[NSString stringWithFormat:#"%#",jsonStr]];
Here orderArray is my array of dictionary and my parsing code is provided below
-(NSDictionary*)getNodeDataByPOST:(NSString*)url parameter:(id)parameter{
NSDictionary *dictionaryData;
NSDictionary *dic;
Reachability *reachTest = [Reachability reachabilityWithHostName:#"www.apple.com"];
NetworkStatus internetStatus = [reachTest currentReachabilityStatus];
if ((internetStatus != ReachableViaWiFi) && (internetStatus != ReachableViaWWAN)){
dictionaryData = [[NSDictionary alloc] initWithObjectsAndKeys:#"error",#"status",#"No Network",#"message",nil];
dic = [NSDictionary dictionaryWithObjectsAndKeys:dictionaryData, #"response",nil];
return dic;
}
else{
NSURL *adUrl =[NSURL URLWithString:url];
NSMutableURLRequest *requestURL = [NSMutableURLRequest requestWithURL:adUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:900.00];
//NSLog(#"%#",requestURL);
[requestURL setHTTPMethod:#"POST"];
NSError *error=nil ;
if ([parameter isKindOfClass : [NSString class]]) {
[requestURL setHTTPBody:[parameter dataUsingEncoding:NSUTF8StringEncoding]];
}
// else if([parameter isKindOfClass:[NSDictionary class]]) {
// [requestURL setHTTPBody:parameter];
// }
else if([parameter isKindOfClass:[NSArray class]]||[parameter isKindOfClass:[NSDictionary class]]) {
[requestURL setHTTPBody:[NSJSONSerialization dataWithJSONObject:parameter options:0 error:nil]];
}
else {
[requestURL setHTTPBody:parameter];
}
NSHTTPURLResponse *response;
NSError *error1=nil;
// NSLog(#"%#\n\n%#",s,parameter);
NSData *apiData = [NSURLConnection sendSynchronousRequest:requestURL returningResponse:&response error:&error1];
if (!apiData) {
NSLog(#"Error: %#", [error localizedDescription]);
}
if (response.statusCode == 0) {
dictionaryData = [[NSDictionary alloc] initWithObjectsAndKeys:#"error",#"status",#"Server Error",#"message",nil];
return dic;
}
else if(response.statusCode == 404) {
dictionaryData= [[NSDictionary alloc] initWithObjectsAndKeys:#"error",#"status",#"Server is Currently Down.",#"message", nil];
return dic;
}
else {
dictionaryData = [NSJSONSerialization JSONObjectWithData:apiData options:kNilOptions error:&error];
}
}
return dictionaryData;
}
I didn't find any coding or logical error from my side. I have used this code several times and it worked fine. Is there any settings are permission required in the app side?
Thanks ....

Answer 1

You said that its working fine in Postman, you should check if the request in to send in form-url encoded formate. If it is, you should add the following line
[requestURL setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];

Answer 2

I use this line and works like a magic for me
[requestURL setValue:#"application/json; charset=utf-8" forHTTPHeaderField:#"Content-Type"];