Failure response from alamofire swift3 - ios

Question

Hello I get stucked with alamofire.
let keys = [CNContactPhoneNumbersKey, CNContactGivenNameKey]
let request = CNContactFetchRequest(keysToFetch: keys as [CNKeyDescriptor])
let contactStore = CNContactStore()
do {
try contactStore.enumerateContacts(with: request) {
(contact, stop) in
// Array containing all unified contacts from everywhere
self.contacts.append(contact)
}
}
catch {
print("unable to fetch contacts")
}
var contactArray = [[String:String]]()
for i in 0..<contacts.count{
var mobiles = ""
for num in contacts[i].phoneNumbers {
mobiles = num.value.stringValue
}
var theDict = ["contact_id": "\(i)", "full_name": contacts[i].givenName, "mobile_number": "\(mobiles)"]
contactArray.append(theDict)
}
dictParams["contacts"] = dictContacts
let theParams = ["contacts":contactArray] as [String:AnyObject]
print("dict theParams: \(theParams)")
this is the printed parameters
dict theParams: ["contacts": <Swift._SwiftDeferredNSArray 0x604000233280>(
{
"contact_id" = 0;
"full_name" = Kate;
"mobile_number" = "62123123";
},
{
"contact_id" = 1;
"full_name" = Daniel;
"mobile_number" = "621231123";
},
{
"contact_id" = 2;
"full_name" = John;
"mobile_number" = "625435345";
}
)
]
and i send it to alamofire with this code
func sendFriendList(dictContacts: [String:AnyObject] ,successBlock:((_ isSuccess: Bool, _ theFriendsResponse: FriendsResponse)->Void)?,errorBlock:((_ errorString:String)->Void)? )-> Void
{
Alamofire.request("url/ListRetrieve",
method: .post,
parameters: dictContacts,
encoding: URLEncoding.default,
headers: headers)
.responseJSON { response in
print("this is response retrieve \(response)")
and the response from alamofire:
this is the response = retrieve FAILURE: responseSerializationFailed(Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 1." UserInfo={NSDebugDescription=Invalid value around character 1.}))
but if I change the parameters only string like this
["contacts":"test contact"]
the alamofire response become success and it's work.
please help me :) thank you

Answer 1

It's not the Alamofire issue. The api needs the "contacts" parameter as String and you are sending an Array of Dictionaries. If you are sending the Array data in "contacts" parameter ask the api developers to change the parameter type or if possible send string as data in "contacts" parameter.
The issue :
this is the response = retrieve FAILURE: responseSerializationFailed(Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 1." UserInfo={NSDebugDescription=Invalid value around character 1.}))
is also stating the invalid character only.

Answer 2

My Parameters is like
// .toJson to your array object or dictonary object and try out
let parameters: [String : Any] = [
"products":[
["pid":"72","qnty":"1"],
["pid":"4","qnty":"1"],
["pid":"3","qnty":"1"]
].toJson ?? "[]",
]
Use this extension for converting Array object to JSON string.
extension Array where Element: Codable {
public var toData: Data {
let encoder = JSONEncoder()
do {
return try encoder.encode(self)
}
catch {
fatalError(error.localizedDescription)
}
}
public var toJson: String? {
return toData.toJson
}
}

Answer 3

Use responseString instead of responseJSON. Then use JSONSerialization to convert response to JSON.
Something like :
JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
func convertToDictionary(text: String) -> [String: Any]? {
if let data = text.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print(error.localizedDescription)
}
}
return nil
}