swift http request can't get non-200 response - ios

Question

I am using below swift code to make a http request. If the server response 200 OK response, swift can work properly. However, the completionHandler callback never get called until timeout when the server response other than 200 status. Is there any other setting on swift to prevent receiving other status response?
let urlStr = "http://xxxxx"
let url = NSURL(string: urlStr)!
let request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "post"
let task = NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: {(data, response, error) in
guard let _:NSData = data, let _:NSURLResponse = response where error == nil else {
// no response code
print("response")
return
}
print("get response from register service \(data) \(error)")
})
task.resume()
If that happens, I get timeout error below:
get login response nil error:Optional(Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={NSErrorFailingURLStringKey=http://XXXXX, NSErrorFailingURLKey=http://localhost:8080/nurse/login, _kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-2103, NSLocalizedDescription=The request timed out.})
Also I tested with curl command and I was able to get the response as below. So the server side works fine for me. I believe the problem is on the client side.
$ curl -i -X POST -d 'mobile=1234' http://localhost:8080/nurse/login
HTTP/1.1 10029
Server: Apache-Coyote/1.1
X-Application-Context: application
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: *
Access-Control-Allow-Headers: access_token
Content-Type: text/plain;charset=UTF-8
Content-Length: 18
Date: Thu, 24 Mar 2016 02:39:09 GMT

Answer 1

This seems like a server side problem. The code below works (in Playground):
Try using this url and see if this is happening for you.
Also, I would use a simple tool like curl to test manually your server side before debugging Swift code:
curl -i -X POST -d 'name=yoyo' http://putsreq.com/vccZnwiNpP23RF7nwOPE
EDIT
Here is a function that does what you want. I hardcoded your URL and things are working now.
func postSomeStuff(data: String, completion: (data: NSData?, error: NSError?)->Void) {
let post: NSString = "data=\(data)"
let url = NSURL(string: "http://123.56.184.207:8080/nurse/login")!
let postData = post.dataUsingEncoding(NSUTF8StringEncoding)!
let postLength = String(postData.length)
let request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"
request.HTTPBody = postData
request.setValue(postLength, forHTTPHeaderField: "Content-Length")
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.setValue("*/*", forHTTPHeaderField: "Accept")
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
config.timeoutIntervalForRequest = 120
config.timeoutIntervalForResource = 240
let session = NSURLSession(configuration: config)
let task = session.dataTaskWithRequest(request) { urlData, response, reponseError in
if let receivedData = urlData {
let res = response as! NSHTTPURLResponse!;
NSLog("Response code: %ld", res.statusCode);
if 200..<300 ~= res.statusCode {
completion(data: receivedData, error: nil)
} else {
let returnedError = NSError(domain: "getSomeStuff", code: 1, userInfo: [:])
completion(data: nil, error: returnedError)
}
} else {
var userInfo: [NSObject: AnyObject] = [:]
if let error = reponseError {
userInfo["message"] = error.localizedDescription
userInfo["cause"] = error
}
let returnedError = NSError(domain: "myFunc", code: 2, userInfo: userInfo)
completion(data: nil, error: returnedError)
}
}
task.resume()
}
postSomeStuff("yoyo") { data , err in
if let data = data { print(data) }
if let err = err { print(err) }
}
let sema = dispatch_semaphore_create(0);
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
// Used only in Playground
XCPSetExecutionShouldContinueIndefinitely(true)