How to send NSData as parameter in POST method swift - ios

Question

I'm trying to send a PDF file's NSData to server as a parameter in POST method, by converting PDF into NSData and then NSData to String,
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString
let getPDFPath = paths.stringByAppendingPathComponent("resume.pdf")
let pdfdata = NSData(contentsOfFile: getPDFPath)
let dataString: String? = "\(pdfdata!)"
And uploading as parameter using NSURLSession like this,
let request = NSMutableURLRequest(URL: NSURL(string: "http://someurl/pdf.aspx")!)
request.HTTPMethod = "POST"
let postString = "pdfdata=\(dataString!)"
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) { data, response, error in
guard error == nil && data != nil else { // check for fundamental networking error
print("error=\(error)")
return }
if let httpStatus = response as? NSHTTPURLResponse where httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is \(httpStatus.statusCode)")
print("response = \(response)")
}
let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)
print("responseString = \(responseString)")
}
task.resume()
But it's always giving me Error :
Error Domain=NSURLErrorDomain Code=-1005 "The network connection was
lost." UserInfo={NSUnderlyingError=0x7f8d63f34250 {Error
Domain=kCFErrorDomainCFNetwork Code=-1005 "(null)"
UserInfo={_kCFStreamErrorCodeKey=-4, _kCFStreamErrorDomainKey=4}},
NSErrorFailingURLStringKey=http://someurl/pdf.aspx,
NSErrorFailingURLKey=http://someurl/pdf.aspx,
_kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-4, NSLocalizedDescription=The network connection was lost.}
Things i have tried:
Restarting Simulator
Reset All settings of Simulator
Same error with Alamofire
Tried different Simulators
App Transport Security is YES in info.plist
Only one PDF file (which is 21kb) gets uploaded, others not

Answer 1

It looks like your App Transport Security settings don't allow you to go to the specified URL.
Insert this in your app's plist file:
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>

Answer 2

Since iOS9 you are required to use https only for security reasons. You may edit the Info.plist file and add an exception for your domain.
<key>NSAppTransportSecurity</key>
<dict>
<key>NSExceptionDomains</key>
<dict>
<key>yourdomain.com</key>
<dict>
<key>NSExceptionAllowsInsecureHTTPLoads</key>
<true/>
<key>NSIncludesSubdomains</key>
<true/>
</dict>
</dict>
</dict>
Read more about App Transport Security here:
https://developer.apple.com/library/prerelease/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html#//apple_ref/doc/uid/TP40009251-SW33