I am trying to connect to my localhost API (that I need to build along with the iOS swift app) that returns a json string. The API is written in Laravel 4 framework.
Here is the iOS Swift code to connect and receive the code:
func checkEmail() {
var request = NSMutableURLRequest(URL: NSURL(string: "http://localhost:3306/laravel/rojectapi/checkEmail"))
var session = NSURLSession.sharedSession()
request.HTTPMethod = "POST"
var params = ["email":"myemail#me.com", "password":"password"] as Dictionary
var err: NSError?
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: &err)
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
println("Response: \(response)")
var strData = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Body: \(strData)")
var err: NSError?
var json = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error: &err) as NSDictionary
println("hey")
if(err) {
println(err!.localizedDescription)
}
else {
var success = json["success"] as? Int
println("Success: \(success)")
}
})
task.resume()
}
The Laravel PHP Route:
Route::post('/checkEmail', array(
'as' => 'checkEmail',
'uses' => 'FrontEndController#checkEmail'
));
And then the front-end-controller with the checkEmail method:
public function checkEmail() {
$validator = Validator::make(Input::all(), array(
'email' => 'required|unique:users|email'
));
if($validator->fails()) {
return $validator->messages()->toJson();
} else {
return Response::json(array('success' => true));
}
}
Am I not connecting to the server correctly? I need to do so on my iPhone 5s connected to my laptop, as well as in the emulator. I have tried name.local, localhost:<post> and name.local:<post> in the URL.
Update
I got the code from this tutorial
Either pass NSJSONReadingAllowFragments (.AllowFragments in Swift) or format your JSON properly.
A simple google search revealed that error 3840 is caused due to improperly formatted JSON being passed to the iOS JSON parser.
This occurs if the API is expecting some data from you and you are not able to send it or it is not being received by the APi, try to Echo out the parameter which are received by the API as a response to your iOS Request, It may also occur if you APi Implementation has some error in it, though you may be able to see this error in your Web Console.
I have this error, when i add languages to Localizations in project. When i add language, must change from "localizable strings" to "interface builder storyboard". I mean project of iOS app. Could help you.
Related
I am trying to make a request to a PHP server from my swift app. For some reason php is showing an empty array as the $_REQUEST variable. I have looked through stack overflow and implemented everything I can find that might help, but still getting an empty array in php. Here is the relevant swift code...
func connect(_ pin: String, completion: #escaping(Result<ConnectResponse?, Error>) -> ()) {
let params: [String : Any] = [
"mobile_pin_connect": pin,
"device_info": UIDevice().model,
"additional_info": UIDevice().systemVersion
]
doRequest(params: params) { (data) in
if let data = data {
do {
let res = try JSONDecoder().decode(Dictionary<String, String>.self, from: data)
completion(.success(
ConnectResponse(success: (res["success"] == "true"), connect_id: res["connect_id"] ?? nil, error: res["error"] ?? nil)))
} catch {
completion(.failure(error))
}
} else {
print("in else block")
}
}
}
fileprivate func doRequest(params: [String: Any], completion: #escaping (Data?) -> ()) {
let body = createJsonBody(params)!
self.request.httpBody = body
print("Sending request with thw following variables")
print(String(data: body, encoding: .utf8)!)
print(String(data: self.request.httpBody!, encoding: .utf8))
URLSession.shared.dataTask(with: self.request) { (data, response, error) in
if let error = error {
print("Error in request: \(error)")
completion(nil)
}
let stringResult = String(data: data!, encoding: .utf8)!
let properResult = String(stringResult.map {
$0 == "." ? "=" : $0
})
let decodedData = Data(base64Encoded: properResult)
completion(decodedData)
}.resume()
}
fileprivate func createJsonBody(_ params: [String: Any]) -> Data? {
do {
let jsonData = try JSONSerialization.data(withJSONObject: params)
let body = Data(jsonData).base64EncodedData()
return body
} catch {
print("Unable to create json body: " + error.localizedDescription, error)
return nil
}
}
That sends the request to the server, the setup for the request is in the static var setup...
private static var sharedConnector: ApiConnector = {
let url = URL(string: "https://mywebsiteURLhere.com/api/mobile/challenge")
var request = URLRequest(url: url!)
request.httpMethod = "POST"
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
let connector = ApiConnector(request)
return connector
}()
So I have the right header values for application/json I have the request method set to post, I am base64encoding the json data and in PHP I have the setup getting php://input...
$rawRequest = file_get_contents("php://input");
and dumping the $_REQUEST variable to an error log, but I always get array\n(\n)\n
it is just showing an empty array
I even did
error_log("Raw request from index.php");
error_log(print_r($rawRequest, true));
and it logs a completely empty line.
I can't figure out why PHP is getting nothing in the request, from everything I have seen online I am doing the request correctly in swift. Any help is really appreciated. Thank you
As per your Swift Code, Can you please replace the following method.
fileprivate func createJsonBody(_ params: [String: Any]) -> Data? {
do {
let jsonData = try JSONSerialization.data(withJSONObject: params)
let body = Data(jsonData)
return body
} catch {
print("Unable to create json body: " + error.localizedDescription, error)
return nil
}
}
You need to replace this line let body = Data(jsonData) with
let body = Data(jsonData).base64EncodedData()
Without seeing your PHP code, it is difficult to determine the entire picture. However, whatever steps you perform to encode your data via the client (Swift) you must reverse to successfully decode the message on the server.
For example, if you prepare and send the request from your client as follows.
Client:
JSON encode data
base-64 encode
send data
The your server must reverse the steps to successfully decode the data.
Server:
recv data
base-64 decode data
JSON decode data
Unless your server requires it, I would remove the base-64 encode step, as it only complicates your encode / decode process.
I have created a working example: https://github.com/stuartcarnie/stackoverflow/tree/master/q59329179
Clone it or pull down the specific code in your own project.
To test, open up a terminal and run the php server:
$ cd q59329179/php
$ php -S localhost:8080 router.php
PHP 7.3.9 Development Server started at Thu Dec 19 10:47:58 2019
Listening on http://localhost:8080
Document root is /Users/stuartcarnie/projects/stackoverflow/q59329179/php
Press Ctrl-C to quit.
Test it works with curl in another terminal session:
$ curl -XPOST localhost:8080 --data-binary '{"string": "foo", "number": 5}'
Note you should see output in the php session:
[Thu Dec 19 11:33:43 2019] Array
(
[string] => foo
[number] => 5
)
Run the Swift test:
$ cd q59329179/swift
$ swift run request
Note again, decoded output in php session:
[Thu Dec 19 11:20:49 2019] Array
(
[string] => string value
[number] => 12345
[bool] =>
)
Your request is probably not arriving through the POST structure, but is kept in the request body.
Try running this as your first PHP operation:
$raw = file_get_contents('php://input');
and see what, if anything, is now into $raw. You should see a Base64 encoded string there, that you need to decode - like this, if you need an array:
$info = json_decode(base64_decode($raw), true);
I've tested your code and it's working fine. The issue might be at your PHP end. I've tested the following code on local server as well as on httpbin
The output from a local server (recent version of XAMPP (php 7.3.12)):
Sending request with thw following variables
eyJhZGRpdGlvbmFsX2luZm8iOiIxMy4yLjIiLCJtb2JpbGVfcGluX2Nvbm5lY3QiOiIxMjM0IiwiZGV2aWNlX2luZm8iOiJpUGhvbmUifQ==
result eyJhZGRpdGlvbmFsX2luZm8iOiIxMy4yLjIiLCJtb2JpbGVfcGluX2Nvbm5lY3QiOiIxMjM0IiwiZGV2aWNlX2luZm8iOiJpUGhvbmUifQ==
message ["additional_info": "13.2.2", "mobile_pin_connect": "1234", "device_info": "iPhone"]
Code:
ApiConnector.swift
import Foundation
import UIKit
class ApiConnector{
var request: URLRequest
private init(request: URLRequest) {
self.request = request
}
public static var sharedConnector: ApiConnector = {
let url = URL(string: "http://localhost/post/index.php")
var request = URLRequest(url: url!)
request.httpMethod = "POST"
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
let connector = ApiConnector(request: request)
return connector
}()
func connect(_ pin: String, completion: #escaping(Result<Dictionary<String, String>, Error>) -> ()) {
let params: [String : Any] = [
"mobile_pin_connect": pin,
"device_info": UIDevice().model,
"additional_info": UIDevice().systemVersion
]
doRequest(params: params) { (data) in
if let data = data {
do {
let res = try JSONDecoder().decode(Dictionary<String, String>.self, from: data)
completion(.success(res))
} catch {
completion(.failure(error))
}
} else {
print("in else block")
}
}
}
fileprivate func doRequest(params: [String: Any], completion: #escaping (Data?) -> ()) {
let body = createJsonBody(params)!
self.request.httpBody = body
print("Sending request with thw following variables")
print(String(data: body, encoding: .utf8)!)
URLSession.shared.dataTask(with: self.request) { (data, response, error) in
if let error = error {
print("Error in request: \(error)")
completion(nil)
}
let stringResult = String(data: data!, encoding: .utf8)!
print("result \(stringResult)")
let properResult = String(stringResult.map {
$0 == "." ? "=" : $0
})
let decodedData = Data(base64Encoded: properResult)
completion(decodedData)
}.resume()
}
fileprivate func createJsonBody(_ params: [String: Any]) -> Data? {
do {
let jsonData = try JSONSerialization.data(withJSONObject: params)
let body = Data(jsonData).base64EncodedData()
return body
} catch {
print("Unable to create json body: " + error.localizedDescription, error)
return nil
}
}
}
ViewController.swift
import UIKit
class ViewController: UIViewController {
let session = URLSession.shared
override func viewDidLoad() {
super.viewDidLoad()
ApiConnector.sharedConnector.connect("1234") { (result) in
switch result {
case .success(let message):
print("message \(message)")
case .failure(let error):
print(error.localizedDescription)
}
}
}
}
index.php
echo file_get_contents("php://input");
You can verify your code by doing a request to https://httpbin.org/post
output:
Sending request with thw following variables
eyJkZXZpY2VfaW5mbyI6ImlQaG9uZSIsImFkZGl0aW9uYWxfaW5mbyI6IjEzLjIuMiIsIm1vYmlsZV9waW5fY29ubmVjdCI6IjEyMzQifQ==
result {
"args": {},
"data": "eyJkZXZpY2VfaW5mbyI6ImlQaG9uZSIsImFkZGl0aW9uYWxfaW5mbyI6IjEzLjIuMiIsIm1vYmlsZV9waW5fY29ubmVjdCI6IjEyMzQifQ==",
"files": {},
"form": {},
"headers": {
"Accept": "*/*",
"Accept-Encoding": "gzip, deflate",
"Accept-Language": "en-us",
"Content-Length": "108",
"Content-Type": "application/json; charset=utf-8",
"Host": "httpbin.org",
"User-Agent": "SessionTest/1 CFNetwork/1120 Darwin/19.0.0"
},
"json": null,
"origin": "122.173.135.243, 122.173.135.243",
"url": "https://httpbin.org/post"
}
in else block
If you are running an older version of PHP then You might need HTTP_RAW_POST_DATA
Have look at this SO for more info on PHP side.
Hi all I am trying my hands on Swift and I am trying to post users registration data. I know how to do it firebase but my main project is in php mysql so I want to connect it with swift
#IBAction func signUp(_ sender: Any) {
//check textfield data
checkTextFields()
//create user
let url = NSURL(string: "http://localhost:8888/helo/register.php")
let request = NSMutableURLRequest(url: url! as URL)
request.httpMethod = "POST"
//apending body to url
let body = "Fullname=\(name.text!.lowercased())&userName=\(userName.text!.lowercased())&emailAddress=\(emailAddress.text!.lowercased())&password=\(password.text!.lowercased())"
request.httpBody = body.data(using: String.Encoding.utf8)
//lunching
URLSession.shared.dataTaskWithRequest(request as URLRequest, completionHandler: { (data:NSData?, response:URLResponse?, error:NSError?) in
if error == nil{
dispatch_async(dispatch_get_main_queue(),{
do {
let json = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as?
NSDictionary
guard let parseJSON = json else{
print("Error while parsing")
return
}
let id = parseJSON["id"]
if id != nil {
print(parseJSON)
}
}catch{
print("Caugth an error: \(error)")
}
})
}else{
print("error: \(error)")
}
} )
}
I am getting an error on the line where I have commented as as lunching which say
Cannot convert value of type '(NSData?, URLResponse?, NSError?) -> ()' to expected argument type '(Data?, URLResponse?, Error?) -> Void'
I am new to Swift any help is welcome thank you all. I am using Xcode 9
After enough reading, I just realised I was doing a very tedious and using orthodox method when things have improved. I removed the whole code and did everything with Alamofire. Its really easy and straight forward. I will post the code below to help others who encounter similar problems later on.
//Constant that holds the URL for our web servicer
let URL_USER_REGISTER = "http://localhost:8888/members/register.php?"
Alamofire.request(URL_USER_REGISTER, method: .post, parameters: parameters).responseJSON{
response in
//printing response
print(response)
//getting json value from the server
if let result = response.result.value {
//converting it as NSDictionary
let jsonData = result as! NSDictionary
//displaying the message in label
self.lableMessage.text = jsonData.value(forKey: "message") as! String?
}
}
you have to first import Alamofire.
This is my code and I am unable to compile it .
I am trying to login to my server but it doesnt allow me so
Sorry I am new at programming and I've researched on stackoverflow, regarding this error , I can only parse Dictionary or Array. but I've googled by copying my JSON response but it doesnt work.
Any Suggestions would be helpful !!
import UIKit
class Login: UIViewController {
#IBOutlet var Username: UITextField!
#IBOutlet var Password: UITextField!
#IBAction func Login(sender: UIButton) {
let username=Username.text
let password=Password.text
let URL_LOGIN="http://172.22.95.116/SoilCondition/app/getLogin.php?USERNAME=" + username! + "&PASSWORD=" + password!;
let requestURL = NSURL(string: URL_LOGIN)
let request = NSMutableURLRequest(URL: requestURL!)
request.HTTPMethod = "POST"
let postParameters = "username="+username!+"&password="+password!;
request.HTTPBody = postParameters.dataUsingEncoding(NSUTF8StringEncoding)
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request){
data, response, error in guard let data = data where error == nil
else {
print("error: \(error)")
return
}
do{
let myJSON = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers) as? NSDictionary
if let parseJSON = myJSON{
var msg: String!
msg = parseJSON["message"] as! String?
print(msg)
}
/* if let parseJSON = myJSON {
var msg : String!
msg = parseJSON["message"] as! String?
print(msg)
}*/
/*if data != nil {
json = NSString(data: data, encoding: NSUTF8StringEncoding) as! String
println("json: \(json)")
if let dictionary = parseJSON(jsonString) {
println("dictionary: \(dictionary)")
}*/
} catch let parseError{
print(parseError)
}
}
task.resume()
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
I found this question regarding error code 3840.
As it says there, the problem could be that your server doesn't return valid JSON to you.
Now, you say:
I can only parse Dictionary or Array
I don't know if that means that you are able to actually parse the response you receive from the server into valid JSON here:
let myJSON = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers) as? NSDictionary
But if it doesn't then a good place to start could be to verify whether your server actually returns valid JSON to you.
To do so, you could try calling your server directly from cURL or postman and see what you get in return.
Hope that helps you.
I'm working on an app in Swift. I need to call PHP webservice from this app.
Below code for webservice:
// ViewController.swift
// SwiftPHPMySQL
//
// Created by Belal Khan on 12/08/16.
// Copyright © 2016 Belal Khan. All rights reserved.
//
import UIKit
class ViewController: UIViewController {
//URL to our web service
let URL_SAVE_TEAM = "http://192.168.1.103/MyWebService/api/createteam.php"
//TextFields declarations
#IBOutlet weak var textFieldName: UITextField!
#IBOutlet weak var textFieldMember: UITextField!
//Button action method
#IBAction func buttonSave(sender: UIButton) {
//created NSURL
let requestURL = NSURL(string: URL_SAVE_TEAM)
//creating NSMutableURLRequest
let request = NSMutableURLRequest(URL: requestURL!)
//setting the method to post
request.HTTPMethod = "POST"
//getting values from text fields
let teamName=textFieldName.text
let memberCount = textFieldMember.text
//creating the post parameter by concatenating the keys and values from text field
let postParameters = "name="+teamName!+"&member="+memberCount!;
//adding the parameters to request body
request.HTTPBody = postParameters.dataUsingEncoding(NSUTF8StringEncoding)
//creating a task to send the post request
let task = NSURLSession.sharedSession().dataTaskWithRequest(request){
data, response, error in
if error != nil{
print("error is \(error)")
return;
}
//parsing the response
do {
//converting resonse to NSDictionary
let myJSON = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as? NSDictionary
//parsing the json
if let parseJSON = myJSON {
//creating a string
var msg : String!
//getting the json response
msg = parseJSON["message"] as! String?
//printing the response
print(msg)
}
} catch {
print(error)
}
}
//executing the task
task.resume()
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
I have this array:
let arr = ["aaa", "wassd", "wesdsd"]
Now I need to send this array as parameter like this:
let postParameters = "name="+teamName!+"&member="+memberCount!;
I've done this:
let postParameters = "name="+teamName!+"&member="+memberCount!+"&arr="+arr;
but getting this error:
Expression was too long to be solved in a reasonable time. consider breaking the expression into distinct sub expressions.
Any help would be appreciated.
A little confused about what you are trying to achieve exactly, but it seems you are trying to send an array in a form-url-encoded request which is not how it works.
You can either iterate through the array and individually assign them to values in the request parameter with something like so:
var postParameters = "name=\(teamName)&member=\(member)"
let arr = ["aaa", "wassd", "wesdsd"]
var index = 0
for param in arr{
postParameters += "&arr\(index)=\(item)"
index++
}
print(postParameters) //Results all array items as parameters seperately
Ofcourse, this is a kind of dirty solution and is assuming I'm correct about you trying to send an array incorrectly. If possible, I would send the request as an application/json request, as this would make things much easier and less dirty:
func sendRequest() {
let sessionConfig = NSURLSessionConfiguration.defaultSessionConfiguration()
/* Create session, and optionally set a NSURLSessionDelegate. */
let session = NSURLSession(configuration: sessionConfig, delegate: nil, delegateQueue: nil)
guard var URL = NSURL(string: "http://192.168.1.103/MyWebService/api/createteam.php") else {return}
let request = NSMutableURLRequest(URL: URL)
request.HTTPMethod = "POST"
// Headers
request.addValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
// JSON Body
let bodyObject = [
"name": "\(teamName)",
"member": "\(member)",
"arr": [
"aaa",
"wassd",
"wesdsd"
]
]
request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(bodyObject, options: [])
/* Start a new Task */
let task = session.dataTaskWithRequest(request, completionHandler: { (data: NSData?, response: NSURLResponse?, error: NSError?) -> Void in
if (error == nil) {
// Success
let statusCode = (response as! NSHTTPURLResponse).statusCode
print("URL Session Task Succeeded: HTTP \(statusCode)")
}
else {
// Failure
print("URL Session Task Failed: %#", error!.localizedDescription);
}
})
task.resume()
session.finishTasksAndInvalidate()
}
Hopefully this can get you in the right direction. Good luck!
I'm trying to test an OAuth2 implementation in a Xcode Playground, using a PHP API and a Swift client. Basically, my code looks like this
let url = NSURL(string: "http://localhost:9142/account/validate")!
var request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"
request.HTTPBody!.setValue("password", forKey: "grant_type")
// Other values set to the HTTPBody
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) { (response, data, error) in
// Handle response here
}
But I keep getting this error when I instantiate the url variable :
fatal error: unexpectedly found nil while unwrapping an Optional value
I tried not unwrapping it when I instantiate it but rather when I use it, it didn't change anything, the error appears on the first time I unwrap it.
It keeps getting even weirder.. The following
let url = NSURL(string: "http://localhost:9142/account/validate")!
println(url)
outputs
http://localhost:9142/account/validate
fatal error: unexpectedly found nil while unwrapping an Optional value
I really don't understand where the error can come from, as I'm really new to Swift
What is happening is you are forced unwrapping the HTTPBody which is set to nil, causing a runtime error at this line:
request.HTTPBody!.setValue("password", forKey: "grant_type")
You need to create an NSData object for your request body and then assign it to the request.HTTPBody as per the following code:
let url = NSURL(string: "http://localhost:9142/account/validate")!
var request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"
// Create a parameter dictionary and assign to HTTPBody as NSData
let params = ["grant_type": "password"]
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: NSJSONWritingOptions.allZeros, error: nil)
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) { (response, data, error) in
// Handle response here
}
I hope this helps solves your problem.
Update:
In order to serialise data without using a JSON serializer, you can create your own similar to below:
func dataWithParameterDictionary(dict: Dictionary<String, String>) -> NSData? {
var paramString = String()
for (key, value) in dict {
paramString += "\(key)=\(value)";
}
return paramString.dataUsingEncoding(NSASCIIStringEncoding, allowLossyConversion: false)
}
and call it like such:
let dict = ["grant_type": "password"]
let data = dataWithParameterDictionary(dict)
request.HTTPBody = data