Sending Http Post request returns 500 status code in IoS - ios

Question

I am trying to send Receipt data of NSData type(converted to string) and several other parameters of type as String in Http Post request.
func receiptValidation(productId:String)
{
let SUBSCRIPTION_SECRET = My_SecretKey
let defaults = UserDefaults.standard
let receiptPath = Bundle.main.appStoreReceiptURL?.path
if FileManager.default.fileExists(atPath: receiptPath!){
var receiptData:NSData?
do{
receiptData = try NSData(contentsOf: Bundle.main.appStoreReceiptURL!, options: NSData.ReadingOptions.alwaysMapped)
}
catch{
print("ERROR: " + error.localizedDescription)
}
let receiptString = receiptData?.base64EncodedString(options: NSData.Base64EncodingOptions(rawValue: 0))
// let base64encodedReceipt = receiptData?.base64EncodedString(options: NSData.Base64EncodingOptions.endLineWithCarriageReturn)
let requestDictionary = ["receipt-data":receiptString!,"password":SUBSCRIPTION_SECRET]
guard JSONSerialization.isValidJSONObject(requestDictionary) else { print("requestDictionary is not valid JSON"); return }
do {
let requestData = try JSONSerialization.data(withJSONObject: requestDictionary)
let requestDataString = NSString(data: requestData, encoding: String.Encoding.utf8.rawValue)
//https://<apiProxyServer>:<apiProxyServerPort>/api/validate-receipt-data
let URLForApplication:String = String(format:"%#/api/validate-receipt-data",opcodeDetails["apiProxyBaseUrl"]!) // this works but as noted above it's best to use your own trusted server
let url:URL! = URL.init(string: URLForApplication)
var request = URLRequest.init(url: url)
request.httpMethod = "POST"
let configure = URLSessionConfiguration.background(withIdentifier: Bundle.main.bundleIdentifier!)
var postString:[String:Any]=[
"receiptData": requestDataString
"deviceType":"IOS",
"subscriberId":encodeString(normalString: defaults.array(forKey: "userDetails")?.first as! String),
"password":encodeString(normalString: defaults.array(forKey: "userDetails")?.last as! String),
"productId":encodeString(normalString: productId),
"code":opcodeDetails["opCode"]!
]
do {
let receiptData = try JSONSerialization.data(withJSONObject: postString)
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.httpBody = receiptData
} catch let error {
print(error.localizedDescription)
}
let session = URLSession(configuration:configure,
delegate:applicationDelegate.application,
delegateQueue:OperationQueue.main)
session1 = session
let connection = session1?.dataTask(with: request)
connection?.resume()
} catch let error as NSError {
print("json serialization failed with error: \(error)")
}
}
}
Where encodeString() is a defined method
func encodeString(normalString:String) -> String {
let allowedCharacters = CharacterSet.letters
let encodedString:String!=normalString.addingPercentEncoding(withAllowedCharacters: allowedCharacters)
return encodedString
}
There were no problem on server side.But I could not get success response instead What I am getting is {"status":"failure","statusCode":500,"message":"Resource url not found!"}.What mistake am i doing with this code?.Anyone please help me.Thanks in advance.

Answer 1

Try appending '/' at the end of URL.
Eg:
google.com/api/post and google.com/api/post/ are different and trailing slash sometimes gives 500 error, in case of Django-Backend it does.