i have a json request and my problem is that the response from the server does not have time to come and because of this I get an error because I'm working with data (in viewdidload()) which is not yet available. I tried to read about synchronous and asynchronous requests but I don't understand how to do them.
in viewDidLoad() i call my fucn which is call to the my server and i wait a json, after executing the function, I start working with the data that should come , But the code does not wait for the moment when they come and go further. Can I specify a delay or something like that?
Alamofire.request(url, method: .post, parameters: params, encoding: JSONEncoding.default, headers: headers).responseJSON {
(response: DataResponse) in
switch(response.result) {
case .success(let value):
let json = JSON(value)
for index in 0 ..< json["items"].count {
let path = json["items"][index]
self.Data.append(ProfileModel())
self.Data[index].name = path["name"].stringValue
self.Data[index].email = path["email"].stringValue
self.Data[index].created = path["created"].double!
self.tableView.reloadData()
}
DispatchQueue.main.async {
}
case .failure(let error):
print(error)
break
}
}.resume()
}
I have migrated my project to Swift 3 (and updated Alamofire to latest Swift 3 version with pod 'Alamofire', '~> 4.0' in the Podfile).
I now get an "Extra argument in call" error on every Alamofire.request. Eg:
let patientIdUrl = baseUrl + nextPatientIdUrl
Alamofire.request(.POST, patientIdUrl, parameters: nil, headers: nil, encoding: .JSON)
Can anybody tell me why ?
According to Alamofire documentation for version 4.0.0 URL request with HTTP method would be followings:
Alamofire.request("https://httpbin.org/get") // method defaults to `.get`
Alamofire.request("https://httpbin.org/post", method: .post)
Alamofire.request("https://httpbin.org/put", method: .put)
Alamofire.request("https://httpbin.org/delete", method: .delete)
So your url request will be:
Alamofire.request(patientIdUrl, method: .post, parameters: nil, encoding: JSONEncoding.default, headers: nil)
and a sample request will be:
Alamofire.request(url, method: .post, parameters: param, encoding: JSONEncoding.default, headers: [AUTH_TOKEN_KEY : AUTH_TOKEN])
.responseJSON { response in
print(response.request as Any) // original URL request
print(response.response as Any) // URL response
print(response.result.value as Any) // result of response serialization
}
Hope this helps!
This one worked for me. No need to remove encoding parameter
Update for Swift 5.x
Alamofire uses the Result type introduced in Swift 5.Also Alamofire.request has been changed to AF.request which will now read their switch response.result value with .success and .failure
AF.request("https://yourServiceURL.com", method: .get, parameters: [:], encoding: URLEncoding.default, headers: ["":""]).responseJSON { (response) in
switch response.result {
case let .success(value):
print(value)
case let .failure(error):
print(error)
}
}
Swift 3.x / 4.x
Alamofire.request("https://yourServiceURL.com", method: .post, parameters: parameters, encoding: JSONEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in
switch(response.result) {
case .success(_):
if let data = response.result.value{
print(response.result.value)
}
break
case .failure(_):
print(response.result.error)
break
}
}
and make sure that the parameters are of type
[String:Any]?
In case of Get
Alamofire.request("https://yourGetURL.com", method: .get, parameters: ["":""], encoding: URLEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in
switch(response.result) {
case .success(_):
if let data = response.result.value{
print(response.result.value)
}
break
case .failure(_):
print(response.result.error)
break
}
}
Even works with
JSONEncoding.default
For Headers
If you are passing headers, make sure their type should be [String:String]
Go through the Parameter Encoding Link
https://github.com/Alamofire/Alamofire/blob/master/Documentation/Alamofire%204.0%20Migration%20Guide.md#parameter-encoding-protocol
Post method Alamofire 4.0 with Swift 3.0 and xCode 8.0
Alamofire.request(URL, method: .post, parameters: PARAMS)
.responseJSON { closureResponse in
if String(describing: closureResponse.result) == "SUCCESS"
{
// Sucess code
}
else
{
// Failure Code
}
}
My solution is if you are using headers, its type must be [String:String].
This error is up to parameters value. It has to be [String: String]
let url = URL(string: "http://yourURLhere")!
let params: [String: String] = ["name": "oskarko", "email": "youremail#here.com", "sex": "male"]
Alamofire.request(url, method: .post, parameters: params, encoding: URLEncoding.default, headers: nil).validate(statusCode: 200..<600).responseJSON() { response in
switch response.result {
case .success:
var result = [String:String]()
if let value = response.result.value {
let json = JSON(value)
}
case .failure(let error):
print("RESPONSE ERROR: \(error)")
}
}
I just resolved the same problem as you have. The problem is I have imported Alamofire in the header, so I just remove the Alamofire when call request. Like that:
request(.POST, patientIdUrl, parameters: nil, headers: nil, encoding:
.JSON)
I hope it can help you.
I ran into this same Extra argument 'method' in call error when my URL variable was out of scope.
In your case, please make sure both baseUrl and nextPatientIdUrl are in scope when they are being used Alamofire.request(patientIdUrl,..) method.
Hopefully this resolves your issue. Thanks You!
func API()
{
if Reachability.isConnectedToNetwork()
{
let headers = ["Vauthtoken":"Bearer \(apiToken)"]
print(headers)
// let parameter = ["iLimit":"10","iOffset":"0","iThreadId":"1"]
ApiUtillity.sharedInstance.showSVProgressHUD(text: "Loding...")
Alamofire.request(ApiUtillity.sharedInstance.API(Join: "vehicle/CurrentVehicleLists"), method:.get, parameters:nil, headers: headers).responseJSON { response in
switch response.result {
case .success:
print(response)
ApiUtillity.sharedInstance.dismissSVProgressHUD()
let dictVal = response.result.value
let dictMain:NSDictionary = dictVal as! NSDictionary
let statusCode = dictMain.value(forKey: "status") as! Int
if(statusCode == 200)
{
}
else if statusCode == 401
{
}
else
{
}
case .failure(let error):
print(error)
ApiUtillity.sharedInstance.dismissSVProgressHUD()
}
}
} else
{
ApiUtillity.sharedInstance.dismissSVProgressHUD()
ApiUtillity.sharedInstance.showErrorMessage(Title: "Internet Connection", SubTitle: "Internet connection Faild", ForNavigation: self.navigationController!)
}
}
For me this is working.
For GET Request
Alamofire.request("http://jsonplaceholder.typicode.com/todos/1/get").responseJSON { (response:DataResponse<Any>) in
switch(response.result) {
case .success(_):
if response.result.value != nil{
print(response.result.value!)
}
break
case .failure(_):
print(response.result.error)
break
}
}
For POST
let parameters = NSDictionary(object: "nara", forKey: "simha" as NSCopying)
Alamofire.request("http://jsonplaceholder.typicode.com/posts", method: HTTPMethod.post, parameters: parameters as? Parameters, encoding: JSONEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in
switch(response.result) {
case .success(_):
if response.result.value != nil{
print(response.result.value!)
}
break
case .failure(_):
print(response.result.error)
break
}
}
Thanks #Rajan Maheswari.
I fixed this issue with:
Reorder parameters (url then method type).
Change Encoding Enum to be "JSONEncoding.default" for example.
Note that: Alamofire methods signature change in Swift 3
Two things that I found worth noting.
Remove the first url label before its value. Use
Alamofire.request("https://yourServiceURL.com", method: .post,
instead of Alamofire.request(url: "https://yourServiceURL.com",
method: .post,.
Make sure the data type of the parameters is [String:
String]. Declare it explicitly.
I copy this code from Alamofire,create a URLRequest and used Alamofire.request(URLRequest) method, avoid this error
originalRequest = try URLRequest(url: url, method: method, headers: headers)
let encodedURLRequest = try encoding.encode(originalRequest!, with: parameters)
I fixed this issue this way:
Just remove extra parameters, just parameters, encoding and headers, if these parameters are nil you can remove then and leave this way,
Alamofire.request(yourURLString, method: .post)
If you have added Alamofire files locally then don't use "Alamofire" before request
let apipath = “your api URL”
request(apipath, method: .post, parameters: parameters, encoding: URLEncoding.default, headers: nil).responseJSON { response in switch(response.result) {
case .success(_):
do {
let JSON = try JSONSerialization.jsonObject(with: response.data! as Data, options:JSONSerialization.ReadingOptions(rawValue: 0))
guard let JSONDictionary: NSDictionary = JSON as? NSDictionary else {
print("Not a Dictionary")
return
}
print("Post Response : \(JSONDictionary)")
}
catch let JSONError as NSError {
print("\(JSONError)")
}
break
case .failure(_):
print("failure Http: \(String(describing: response.result.error?.localizedDescription))")
break
}
}
In past version of Alamofire, for send method,header and parameter I used to do like this:
Alamofire.request(.GET, URLRequest, headers:headers, parameters: parameters)
but version 4 and swift 3 is different.
How can I set method, send header & parameter?
The migration guide at Alamofire github explains this very well.
Take a look here:
// Alamofire 3
let parameters: [String: AnyObject] = ["foo": "bar"]
Alamofire.request(.GET, urlString, parameters: parameters, encoding: .JSON)
.progress { bytesRead, totalBytesRead, totalBytesExpectedToRead in
print("Bytes: \(bytesRead), Total Bytes: \(totalBytesRead), Total Bytes Expected: \(totalBytesExpectedToRead)")
}
.validate { request, response in
// Custom evaluation closure (no access to server data)
return .success
}
.responseJSON { response in
debugPrint(response)
}
// Alamofire 4
let parameters: Parameters = ["foo": "bar"]
Alamofire.request(urlString, method: .get, parameters: parameters, encoding: JSONEncoding.default)
.downloadProgress(queue: DispatchQueue.utility) { progress in
print("Progress: \(progress.fractionCompleted)")
}
.validate { request, response, data in
// Custom evaluation closure now includes data (allows you to parse data to dig out error messages if necessary)
return .success
}
.responseJSON { response in
debugPrint(response)
}
The migration guide explained well, but there are no headers in the example, just to avoid confusions, bellow I add the example of a GET request to add them.
Alamofire.request(URL, method: .get, parameters: parameters, headers: headers)
.validate { request, response, data in
return .success
}
.responseJSON { response in
switch response.result {
case .success:
// do something
break
case .failure(let error):
// handle error
break
}
}
I found this information in here so, go and check it there if you have question related with the headers in the request.
I'm using Alamofire for my http requests but I'm not able to get error message from requests that don't pass validation
Alamofire.request(method, url, headers: headers, parameters: parameters, encoding: encoding)
.validate(statusCode: 200..<300)
.responseJSON { response in
switch response.result {
case .Success:
// response.result.value returns JSON
case .Failure(let error):
// response.result.value returns nil
}
}
How can I get data (JSON) if I get error code 400 and others. The API is sending the data in body even if the request was not successful.
As Following SaiCYLi, Only way to get response data is avoid using validate.
See Result.swift in Alamofire.
There is blocker.
public var value: Value? {
switch self {
case .Success(let value):
return value
case .Failure:
return nil
}
}
I wanted comment to you instead of answering. But I have reputation less than 50. Sorry.
just delete your validation of status code
Code:
Alamofire.request(method, url, headers: headers, parameters: parameters, encoding: encoding)
.responseJSON {
response in
let statusCode = response.response.statusCode
switch statusCode {
case 200..<300:
// Success
case 404:
// not found
default:
// something else
}
}
I have a pretty simple scenario that I'm struggling with. I'm using Alamofire to register a user on a rest API. The first call to register is successful and the user can log in. The second call, when trying to register with the same email address should result in a HTTP status code 409 from the server. Alamofire, however, returns a .Success with an empty request and response. I have tested this this API with postman and it correctly returns a 409.
Why is Alamofire not returning .Failure(error), where the error has status code info etc?
Here is the call I run with the same input each time.
Alamofire.request(.POST, "http://localhost:8883/api/0.1/parent", parameters: registrationModel.getParentCandidateDictionary(), encoding: .JSON).response(completionHandler: { (req, res, d, e) -> Void in
print(req, res, d, e)
})
From the Alamofire manual:
Validation
By default, Alamofire treats any completed request to be successful,
regardless of the content of the response. Calling validate before a
response handler causes an error to be generated if the response had
an unacceptable status code or MIME type.
You can manually validate the status code using the validate method, again, from the manual:
Alamofire.request(.GET, "https://httpbin.org/get", parameters: ["foo": "bar"])
.validate(statusCode: 200..<300)
.validate(contentType: ["application/json"])
.response { response in
print(response)
}
Or you can semi-automatically validate the status code and content-type using the validate with no arguments:
Alamofire.request(.GET, "https://httpbin.org/get", parameters: ["foo": "bar"])
.validate()
.responseJSON { response in
switch response.result {
case .success:
print("Validation Successful")
case .failure(let error):
print(error)
}
}
If using response, you can check the NSHTTPURLResponse parameter:
Alamofire.request(urlString, method: .post, parameters: registrationModel.getParentCandidateDictionary(), encoding: JSONEncoding.default)
.response { response in
if response.response?.statusCode == 409 {
// handle as appropriate
}
}
By default, 4xx status codes aren't treated as errors, but you can use validate to treat it as an such and then fold it into your broader error handling:
Alamofire.request(urlString, method: .post, parameters: registrationModel.getParentCandidateDictionary(), encoding: JSONEncoding.default)
.validate()
.response() { response in
guard response.error == nil else {
// handle error (including validate error) here, e.g.
if response.response?.statusCode == 409 {
// handle 409 here
}
return
}
// handle success here
}
Or, if using responseJSON:
Alamofire.request(urlString, method: .post, parameters: registrationModel.getParentCandidateDictionary(), encoding: JSONEncoding.default)
.validate()
.responseJSON() { response in
switch response.result {
case .failure:
// handle errors (including `validate` errors) here
if let statusCode = response.response?.statusCode {
if statusCode == 409 {
// handle 409 specific error here, if you want
}
}
case .success(let value):
// handle success here
print(value)
}
}
The above is Alamofire 4.x. See previous rendition of this answer for earlier versions of Alamofire.
if you use validate() you'll loose the error message from server, if you want to keep it, see this answer https://stackoverflow.com/a/36333378/1261547
Here is my code for AlamoFire error catching:
switch response.result {
case .success(let value):
completion(.success(value))
case .failure(var error):
var errorString: String?
if let data = response.data {
if let json = try? (JSONSerialization.jsonObject(with: data, options: []) as! [String: String]) {
errorString = json["error"]
}
}
let error = MyError(str: errorString!)
let x = error as Error
print(x.localizedDescription)
completion(.failure(x))
}
and the MyError class difinition:
class MyError: NSObject, LocalizedError {
var desc = ""
init(str: String) {
desc = str
}
override var description: String {
get {
return "MyError: \(desc)"
}
}
//You need to implement `errorDescription`, not `localizedDescription`.
var errorDescription: String? {
get {
return self.description
}
}
}