A JSON parsing error occurred, here are the details: - ios
Code
func callAddWithPOST(Name mname:String, PhoneNo mphone:String, Email memail:String, Comment mcomments:String){
var names = [String]()
let login = ["countryId":"1"]
print("Your Result is : = \(login)")
let url = NSURL(string: "http://photokeeper.mgtcloud.co.uk/commonwebservice.asmx/getStateList")!
let session = NSURLSession.sharedSession()
let request = NSMutableURLRequest(URL: url)
do {
let auth = try NSJSONSerialization.dataWithJSONObject(login, options: .PrettyPrinted)
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
request.HTTPMethod = "POST"
request.HTTPBody = auth
let task = session.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in
let badJsonString = "This really isn't valid JSON at all"
let badJsonData = badJsonString.dataUsingEncoding(NSUTF8StringEncoding)!
do {
let parsed = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments)
print(parsed)
let otherParsed = try NSJSONSerialization.JSONObjectWithData(badJsonData, options: NSJSONReadingOptions.AllowFragments)
}
catch let error as NSError {
print("A JSON parsing error occurred, here are the details:\n \(error)")
}
print("Done.")
})
task.resume()
} catch {
print("Error")
}}
OUTPUT
{
d = "{\"result\":[{\"stateId\":3871,\"stateName\":\"Aberdeenshire\"},{\"stateId\":3872,\"stateName\":\"Anglesey/Sir Fon\"},{\"stateId\":3873,\"stateName\":\"Angus\"},{\"stateId\":3874,\"stateName\":\"Antrim\"},{\"stateId\":3875,\"stateName\":\"Argyll And Bute\"},{\"stateId\":3876,\"stateName\":\"Armagh\"},{\"stateId\":3877,\"stateName\":\"Ayrshire\"},{\"stateId\":3878,\"stateName\":\"Bedfordshire\"},{\"stateId\":3879,\"stateName\":\"Berkshire\"},{\"stateId\":3880,\"stateName\":\"Blaenau Gwent/Blaenau Gwent\"},{\"stateId\":3881,\"stateName\":\"Bristol\"},{\"stateId\":3882,\"stateName\":\"Buckinghamshire\"},{\"stateId\":3883,\"stateName\":\"Caerphilly/Caerffili\"},{\"stateId\":3884,\"stateName\":\"Cambridgeshire\"},{\"stateId\":3885,\"stateName\":\"Cardiff/Caerdydd\"},{\"stateId\":3886,\"stateName\":\"Cardiganshire/Ceredigion\"},{\"stateId\":3888,\"stateName\":\"Carmarthenshire/Sir Gaerfyrddin\"},{\"stateId\":3890,\"stateName\":\"Cheshire\"},{\"stateId\":3891,\"stateName\":\"Clackmannanshire\"},{\"stateId\":3893,\"stateName\":\"Conwy/Conwy\"},{\"stateId\":3895,\"stateName\":\"County Durham\"},{\"stateId\":3896,\"stateName\":\"Cumbria\"},{\"stateId\":3897,\"stateName\":\"Denbighshire/Sir Ddinbych\"},{\"stateId\":3898,\"stateName\":\"Derbyshire\"},{\"stateId\":3899,\"stateName\":\"Devon\"},{\"stateId\":3901,\"stateName\":\"Dorset\"},{\"stateId\":3902,\"stateName\":\"Down\"},{\"stateId\":3904,\"stateName\":\"Dumfries And Galloway\"},{\"stateId\":3905,\"stateName\":\"Dunbartonshire\"},{\"stateId\":3906,\"stateName\":\"Dundee\"},{\"stateId\":3907,\"stateName\":\"Durham/North Yorkshire\"},{\"stateId\":3908,\"stateName\":\"East Lothian\"},{\"stateId\":3909,\"stateName\":\"East Sussex\"},{\"stateId\":3910,\"stateName\":\"East Yorkshire\"},{\"stateId\":3911,\"stateName\":\"Edinburgh\"},{\"stateId\":3912,\"stateName\":\"Essex\"},{\"stateId\":3913,\"stateName\":\"Fermanagh\"},{\"stateId\":3914,\"stateName\":\"Fife\"},{\"stateId\":3915,\"stateName\":\"Flintshire/Sir Fflint\"},{\"stateId\":3917,\"stateName\":\"Glamorgan/Morgannwg\"},{\"stateId\":3918,\"stateName\":\"Glasgow\"},{\"stateId\":3919,\"stateName\":\"Gloucestershire\"},{\"stateId\":3920,\"stateName\":\"Gwynedd/Gwynedd\"},{\"stateId\":3921,\"stateName\":\"Hampshire\"},{\"stateId\":3922,\"stateName\":\"Herefordshire\"},{\"stateId\":3923,\"stateName\":\"Hertfordshire\"},{\"stateId\":3924,\"stateName\":\"Highland\"},{\"stateId\":3925,\"stateName\":\"Kent\"},{\"stateId\":3929,\"stateName\":\"Lanarkshire\"},{\"stateId\":3930,\"stateName\":\"Lancashire\"},{\"stateId\":3932,\"stateName\":\"Leicestershire\"},{\"stateId\":3935,\"stateName\":\"Lincolnshire\"},{\"stateId\":3936,\"stateName\":\"London\"},{\"stateId\":3937,\"stateName\":\"Londonderry\"},{\"stateId\":3940,\"stateName\":\"Manchester\"},{\"stateId\":3943,\"stateName\":\"Merthyr Tydfil/Merthyr Tydfil\"},{\"stateId\":3944,\"stateName\":\"Midlothian\"},{\"stateId\":3946,\"stateName\":\"Monmouthshire/Sir Fynwy\"},{\"stateId\":3947,\"stateName\":\"Moray\"},{\"stateId\":3948,\"stateName\":\"Neath Port Talbot\"},{\"stateId\":3949,\"stateName\":\"Newport\"},{\"stateId\":3950,\"stateName\":\"Norfolk\"},{\"stateId\":3951,\"stateName\":\"Northamptonshire\"},{\"stateId\":3952,\"stateName\":\"Northumberland\"},{\"stateId\":3953,\"stateName\":\"Nottinghamshire\"},{\"stateId\":3955,\"stateName\":\"Orkney\"},{\"stateId\":3956,\"stateName\":\"Oxfordshire\"},{\"stateId\":3957,\"stateName\":\"Pembrokeshire/Sir Benfro\"},{\"stateId\":3958,\"stateName\":\"Perth And Kinross\"},{\"stateId\":3959,\"stateName\":\"Powys/Powys\"},{\"stateId\":3960,\"stateName\":\"Renfrewshire\"},{\"stateId\":3962,\"stateName\":\"Rutland\"},{\"stateId\":3963,\"stateName\":\"Scottish Borders\"},{\"stateId\":3964,\"stateName\":\"Shetland Isles\"},{\"stateId\":3965,\"stateName\":\"Shropshire\"},{\"stateId\":3967,\"stateName\":\"Somerset\"},{\"stateId\":3968,\"stateName\":\"South Yorkshire\"},{\"stateId\":3969,\"stateName\":\"Staffordshire\"},{\"stateId\":3970,\"stateName\":\"Stirling\"},{\"stateId\":3971,\"stateName\":\"Suffolk\"},{\"stateId\":3972,\"stateName\":\"Surrey\"},{\"stateId\":3973,\"stateName\":\"Swansea\"},{\"stateId\":3975,\"stateName\":\"Torfaen\"},{\"stateId\":3976,\"stateName\":\"Tyrone\"},{\"stateId\":3977,\"stateName\":\"Warwickshire\"},{\"stateId\":3979,\"stateName\":\"West Lothian\"},{\"stateId\":3980,\"stateName\":\"West Midlands\"},{\"stateId\":3981,\"stateName\":\"West Sussex\"},{\"stateId\":3982,\"stateName\":\"West Yorkshire\"},{\"stateId\":3983,\"stateName\":\"Western Isles\"},{\"stateId\":3987,\"stateName\":\"Wiltshire\"},{\"stateId\":3988,\"stateName\":\"Worcestershire\"},{\"stateId\":3989,\"stateName\":\"Wrexham\"}],\"status\":\"success\"}";
}
A JSON parsing error occurred, here are the details:
Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.}
Done.
I AM GETTING ERROR - Invalid value around character 0. I want to get data in proper format with desired key and value, will anybody please help me to fix this issues.
Your JSON response is corrupted. Use JSONLint to verify it.
Convert it from
{\"result\":[{\"stateId\":3871,\"stateName\":\"Aberdeenshire\"}
to
{
"result": {
"stateId": 3871,
"stateName": "Aberdeenshire"
}
}
Notice the removal of the backslashes.
Looks like you are getting String in your response, so try something like this.
do {
let parsed = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments) as! [String: AnyObject]
let responseStr = parsed["d"] as! String
let correctData = responseStr.dataUsingEncoding(NSUTF8StringEncoding)
let responseDic = try NSJSONSerialization.JSONObjectWithData(correctData, options: NSJSONReadingOptions.AllowFragments) as! [String: AnyObject]
print(responseDic)
}
catch let error as NSError {
print("A JSON parsing error occurred, here are the details:\n \(error)")
}
Try this,
if let result:String = parsed["d"]! {
let result = convertStringToDictionary(text: result)
print("Converted result = \(result)")
}
//SWIFT 3
func convertStringToDictionary(text: String) -> [String:AnyObject]? {
if let data = text.data(using: String.Encoding.utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String:AnyObject]
} catch let error as NSError {
print(error)
}
}
return nil
}
//SWIFT 2
func convertStringToDictionary(text: String) -> [String:AnyObject]? {
if let data = text.dataUsingEncoding(NSUTF8StringEncoding) {
do {
return try NSJSONSerialization.JSONObjectWithData(data, options: []) as? [String:AnyObject]
} catch let error as NSError {
print(error)
}
}
return nil
}
Related
How to avoid "Error Domain=NSCocoaErrorDomain Code=3840" in Swift?
I keep getting this particular error when trying to parse a JSON response in Swift:
Error Domain=NSCocoaErrorDomain Code=3840 "No value." UserInfo={NSDebugDescription=No value.}
Code:
let dict = [
"phone": phone,
"firstname": "\(String(describing: firstName))",
"lastname": "\(String(describing: lastName))"
]
as [String: Any]
if let jsonData = try? JSONSerialization.data(withJSONObject: dict, options: []) {
var request = URLRequest(url: URL(string: "\(config.baseURL)employee")!)
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData
request.timeoutInterval = 30.0
let task = URLSession.shared.dataTask(with: request) { data, response, error in
if error != nil {
DispatchQueue.main.async {
self.alertController.singleButtonAlertController("Error", (error?.localizedDescription)!, self, self.defaultAction)
return
}
}
guard let data_ = data else {
return
}
do {
let jsonObj = try JSONSerialization.jsonObject(with: data_, options: .mutableContainers) as? NSDictionary
guard let parseJSON = jsonObj else {
return
}
self.navigationItem.rightBarButtonItem = self.rightBarButton
let meta = parseJSON["meta"] as? [String:Any]
let status = meta!["status"] as? String
if status == "200" {
isEmployeeModified = true
self.dismiss(animated: true, completion: nil)
} else {
let info = meta!["info"] as? String
let message = meta!["message"] as? String
DispatchQueue.main.async {
self.alertController.singleButtonAlertController(info!, message!, self, self.defaultAction)
}
}
} catch let error as NSError {
print(error)
}
}
task.resume()
I have used similar codes in other parts of the project and everything checks out.
According to this Error, the response from your server is not a valid JSON
Can you use responseString instead of responseJSON like below
Alamofire.request(URL, method: requestMethod, parameters: params).responseString{ response in
print(response)
}
I was able to figure out what was wrong and I'm going to explain this here for future readers. Apparently, I was doing a GET request the wrong way, so when I intend to do a POST request, for some reason, it still sees it as a GET request and that was why I kept getting the response: Error Domain=NSCocoaErrorDomain Code=3840 "No value." UserInfo={NSDebugDescription=No value.}
Below is my refactored code and it works without any hassle:
let dict = [
"phone": phone,
"firstname": firstName,
"lastname": lastName
] as [String : Any]
guard let jsonData = try? JSONSerialization.data(withJSONObject: dict, options: []) else {
return
}
guard let url = URL(string: "\(config.baseURL)employee") else {
return
}
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData as Data
request.timeoutInterval = 10
let session = URLSession.shared
session.dataTask(with: request) { (data, response, error) in
if let response = response {
print("JSON Response: \(response)")
}
if error != nil {
DispatchQueue.main.async {
self.navigationItem.rightBarButtonItem = self.rightBarButton
self.alertController.singleButtonAlertController("Error", (error?.localizedDescription)!, self, self.defaultAction)
return
}
}
if let data = data {
do {
let parseJSON = try JSONSerialization.jsonObject(with: data, options: []) as? NSDictionary
let meta = parseJSON!["meta"] as? [String:Any]
let status = meta!["status"] as? String
if status == "200" {
isEmployeeModified = true
self.dismiss(animated: true, completion: nil)
} else {
let info = meta!["info"] as? String
let message = meta!["message"] as? String
DispatchQueue.main.async {
self.alertController.singleButtonAlertController(info!, message!, self, self.defaultAction)
}
}
} catch {
print(error)
}
}
}.resume()
error while doing JSON Serialization ErrorDomain Code=3840
I am trying to delete a post in a table view, but I get an error while doing JSON serialization, in this line
let json = try JSONSerialization.jsonObject(with: data!, options: []) as? [String: AnyObject]
if i access the url through the browser, the data is successfully deleted in the database, and if it is accessed from the browser, it also gives the json response back like this
{"message":"successfully deleted","result":1,"status":"Image has been
deleted from drive"}
but i got an error that says the json text did not start with array or object (code =3840), but as you can see above, it is a json dictionary
Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}
here is the full code i use. what went wrong in here? Thanks
func deletePost(_ indexPath: IndexPath) {
let tweet = tweetsArray[indexPath.row]
let uuid = tweet["uuid"] as! String
let imagePath = tweet["imagePath"] as! String
let url = URL(string: "http://localhost/Twitter/post.php")
var request = URLRequest(url: url!)
request.httpMethod = "POST"
let body = "uuid=\(uuid)&path=\(imagePath)"
request.httpBody = body.data(using: String.Encoding.utf8)
let session = URLSession.shared
let task = session.dataTask(with: request) { (data, response, error) in
if error == nil {
do {
let json = try JSONSerialization.jsonObject(with: data!, options: []) as? [String: AnyObject]
guard let parsedJSON = json else {
print("error while parsing JSON")
return
}
let jsonMessage = parsedJSON["message"]
if jsonMessage != nil {
// hilangkan data di array
self.tweetsArray.remove(at: indexPath.row)
self.imagesArray.remove(at: indexPath.row)
// hilangkan rownya pada table view
self.tableView.deleteRows(at: [indexPath], with: .automatic)
self.tableView.reloadData()
}
}
catch {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = "\(error)"
self.showAlert(alertTitle: "sorry", alertMessage: message, actionTitle: "OK")
})
return
}
}
else {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = "\(error!.localizedDescription)"
self.showAlert(alertTitle: "sorry", alertMessage: message, actionTitle: "OK")
})
return
}
}
task.resume()
}
You can try to Print out your server response. Please change the code in your catch block like. and identifying an error in server side or not.
Your server data is proper json formate then print out your server data and check a server data is valid or not.
URLSession.shared.dataTask(with: url) { (data, response, error) in
if let jsonData = data {
do {
let parsedData = try JSONSerialization.jsonObject(with: jsonData, options: .mutableLeaves) as! [String: AnyObject]
if let area = parsedData["AREA"] as? [[String: AnyObject]] {
for a in area {
print(a["area_name"])
print(a["price"])
}
}
}
catch let err{
print("\n\n===========Error===========")
print("Error Code: \(error!._code)")
print("Error Messsage: \(error!.localizedDescription)")
if let data = data, let str = String(data: data, encoding: String.Encoding.utf8){
print("Server Error: " + str)
}
debugPrint(error)
print("===========================\n\n")
debugPrint(err)
}
}
else {
debugPrint(error as Any)
}
}.resume()
Json parsing using URLSession not working
Iam getting an error while i try to send the POST request in swift 3. Any one please suggest me the correct syntax for URLSession.shared method in swift 3. this is what i tried. iam new here.
let task = URLSession.shared.dataTask(with: request, completionHandler: {
(data, response, error) in
if error != nil{
print("error");
return
}
do{
let myjson = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
if let parsejson = myjson{
var msg: String!
msg = parsejson["message"] as! String?
print(msg)
}catch error {
print ("")
}
}
})
task.resume().
Here's working URLSession.shared code. I don't have your URL so I used one that is online, free, and produces JSON:
let someURL = URL(string:"https://jsonplaceholder.typicode.com/posts/2")!
let request = URLRequest(url: someURL)
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if error != nil {
print("error")
return
}
guard let data = data else {
print("No data")
return
}
do {
if let myjson = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? Dictionary<String,Any> {
if let title = myjson["title"] {
print("Title was \"\(title)\"")
}
}
} catch {
print("Error parsing JSON: \(error)")
}
}
task.resume()
This outputs Title was "qui est esse" for me.
JSON conversion is getting failed
Please review my code am badly stuck on this issue.
JSON conversion is not happening & it is going into catch block & printing following error.
Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}
I've tried everything which is suggested here on StackOverflow but no luck.
I've trimmed my code for better understanding.
import Foundation
class Server
{
class func convertStringToDictionary(_ data: Data) -> [String:Any]?
{
do
{
let convertedDict = try JSONSerialization.jsonObject(with: data, options: []) as? [String:Any]
return convertedDict
}
catch let error as NSError
{
print(error)
}
return nil
}
class func registerUser( userInfo: String)
{
let url = URL(string: "http://132.148.18.11/missedprayers/welcome/register")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
let postString = "request=" + userInfo
request.httpBody = postString.data(using: .utf8)
//----------------------------------------
let task = URLSession.shared.dataTask(with: request)
{
data, response, error in
guard let data = data, error == nil
else
{
print("error=\(error)")
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200
{
print("statusCode should be 200, but is \(httpStatus.statusCode)")
print("response = \(response)")
}
//--------------
let finalData = Server.convertStringToDictionary(data)
print(finalData)
}
task.resume()
}
func submitBtnTapped(_ sender: AnyObject)
{
let userInfoDict = [
"name":"Maaz Patel",
"phoneNum":"+91899885623",
"email":"maaz#gmail.com",
"city":"pune",
"country":"India",
"dobEnglish":"11-02-1992",
"app":"Dalail",
"aqeeda":"Sufi",
"gender":"male",
"MCCycle":""
]
//-------------------
do
{
let jsonData = try JSONSerialization.data(withJSONObject: userInfoDict, options: [] )
let jsonStr = String.init(data: jsonData, encoding: String.Encoding.utf8)
Server.registerUser(userInfo: jsonStr!)
}
catch let error as NSError
{
print(error)
}
}
}
Consider "SubmitBtnTapped" function is getting called from somewhere.
When am trying on Postman it's working also on Android same web service is working fine.
cannot invoke 'jsonObjectWithData'
I cannot figure out how to solve this issue.
This comes from a youtube tutorial to build a simple Weather App.
The tutorial was uploaded in March 2015 and therefor written in a previous version of Swift, there it worked, with the current Swift 2 it doesn't.
The error I get is: "cannot invoke 'jsonObjectWithData' with an argument list of type '(NSData, options: nil, error: NSError)'"
func getWeatherData(urlString:String) {
let url = NSURL(string: urlString)
let task = NSURLSession.sharedSession().dataTaskWithURL(url!){ (data, response, error) in
dispatch_async(dispatch_get_main_queue(), {
self.setLabels(data)
})
}
task.resume()
}
func setLabels(weatherData: NSData) {
var jsonError: NSError
let json = NSJSONSerialization.JSONObjectWithData(weatherData, options: nil, error: jsonError)
if let name = json["name"] as? String {
self.ResultLabel.text = name
}
}
if you want to get this code ready for Swift 2, you have to run the JSONParser with try and catch possible errors.
private func httpGetRequest(request: NSURLRequest!, callback: (NSData?, String?) -> Void) {
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request){
(data, response, error) -> Void in
if error != nil {
callback(nil, error!.localizedDescription)
} else {
callback(data, nil)
}
}
task!.resume()
}
func setLabels(weatherData: NSData) {
do {
let json = try NSJSONSerialization.JSONObjectWithData(weatherData, options: NSJSONReadingOptions.MutableContainers) as! NSDictionary
if let name = json["name"] as? String {
self.resultLabel.text = name
}
} catch {
print(error)
self.resultLabel.text = "Lorem Ipsum"
}
}
func loadWeatherData() {
let weatherRequest = NSMutableURLRequest(URL: NSURL(string: "Your URL String goes here")!)
httpGetRequest(weatherRequest){
(data, error) -> Void in
if error != nil {
print("Error: \(error)")
} else {
self.setLabels(data!)
}
}
}
Hope that will help to solve your Problems.
Try this: var jsonError: NSError? let json = NSJSONSerialization.JSONObjectWithData(weatherData, options: nil, error: &jsonError)
in swift 3.0 and Swift 4.2
try this ...
do {
let jsonData = try JSONSerialization.data(withJSONObject: your array or dictionary, options: JSONSerialization.WritingOptions()) as Data
let json = try JSONSerialization.jsonObject(with: jsonData as Data, options: JSONSerialization.ReadingOptions(rawValue: UInt(0)))
}
catch
{
}
You need to pass the error pointer into NSJSONSerialization.JSONObjectWithData(...) with &. let json = NSJSONSerialization.JSONObjectWithData(weatherData, options: nil, error: &jsonError) // &jsonError points to the NSErrorPointer of the NSError object
In swift 3 you can try this:
func setLabels(weatherData: NSData) {
do {
var jsonError: NSError
let json = try JSONSerialization.jsonObject(with: weatherData as Data, options: []) as! NSDictionary
if let name = json["name"] as? String {
self.ResultLabel.text = name
}
} catch {
}
}
In Swift 3, you can fix the same error with the code below:
do{
let jsonData = try JSONSerialization.jsonObject(with: (data)!, options: JSONSerialization.ReadingOptions.mutableContainers) as! [String: AnyObject]
}catch{
print("Error while parsing JSON: Handle it")
}