iOS Swift POST api with x-www-form-urlencoded

I have to make an API call with headers as "application/x-www-form-urlencoded" and in body "data" as key and vakue as a JSON string. I have to pass the data as application/x-www-form-urlencoded format. I have attached the screenshot of postman where it is working fine.

[image with headers marked][image with post data as x-www-form-urlencoded marke]

I have tried many links like POST request using application/x-www-form-urlencoded. But couldn't find a correct one.

I'm fine to use other frameworks like Alamofire to solve this issue.

I'm using the below code for this.

let url = URL(string: "http://mylocalhost/get-user-details")!
var request = URLRequest(url: url)
let jsonString = ["email":"example@domain.com"]
let postData = ["data":jsonString]
let jsonData = try! JSONSerialization.data(withJSONObject: postData, options: .prettyPrinted)

request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.httpMethod = "POST"
request.httpBody = jsonData

let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else { // check for fundamental networking error
print("error=(error)")
return
}

if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is (httpStatus.statusCode)")
print("response = (response)")
}

let responseString = String(data: data, encoding: .utf8)
print("responseString = (responseString)")
}

task.resume()


JSONSerialization.data(withJSONObject: postData, options: .prettyPrinted). Don't use prettyPrinted, that's adding line breaks which aren't useful. Use JSONSerialization.data(withJSONObject: postData, options: ) instead. Also, I'm wondering if you don't have infant a JSON inside JSON. Meaning jsonString needs to be "{"email":"example@domain.com"}, because clearly, naming that var jsonString when it's a Dictionary, that's misleading, but the POSTMAN could say so.
– Larme
Jun 29 at 11:18

JSONSerialization.data(withJSONObject: postData, options: .prettyPrinted)

prettyPrinted

JSONSerialization.data(withJSONObject: postData, options: )

jsonString

"{"email":"example@domain.com"}

jsonString

Why don't you simply use "application/json" in "Content-Type".
– sohan vanani
Jun 29 at 11:36

3 Answers
3

Try this

var request = URLRequest(url: URL(string: strURL)!)
request.httpMethod = "POST"
let params = ["email":"example@domain.com"]
let postString = params
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.cachePolicy = URLRequest.CachePolicy.reloadIgnoringCacheData
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
DispatchQueue.main.async {
guard let data = data, error == nil else {
print(error! as NSError)
return
}
do {
let jsonDic = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String:AnyObject]
success(jsonDic! as NSDictionary)
} catch {
print(error as NSError)
}
}
}
task.resume()


If you are want to use Alamofire then use this method.

func request(_ method: HTTPMethod
, _ URLString: String
, parameters: [String : AnyObject]? = [:]
, headers: [String : String]? = [:]
, onView: UIView?, vc: UIViewController, completion:@escaping (Any?) -> Void
, failure: @escaping (Error?) -> Void) {

Alamofire.request(URLString, method: method, parameters: parameters, encoding: URLEncoding.default, headers: headers)
.responseJSON { response in


switch response.result {
case .success:
completion(response.result.value!)
case .failure(let error):
failure(error)
guard error.localizedDescription == JSON_COULDNOT_SERIALISED else {

return
}
}
}
}


Pass this in header parameter

["Content-Type": "application/x-www-form-urlencoded"]


Share you API call response or error you are getting as images are not properly attached.

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