Converting curl command to iOS - ios

Question

The following curl works
curl -G -H "api_key: MYAPIKEY" https://api.semantics3.com/test/v1/products -d 'q={"upc":"70411576937"}'
However, upon trying to convert it to iOS I get the following error:
Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost." {NSErrorFailingURLStringKey=https://api.semantics3.com/test/v1/products,...}
I have attached my code below but I believe that my problem is the "q=" right before the json data that is being submitted to the URL. If so, what is this called and how do I put "q=" before my json data? I can't exactly tell though, due to iOS' unfaltering ability to provide us with unrelated error messages. Thank you.
var urlString = "https://api.semantics3.com/test/v1/products"
var request = NSMutableURLRequest(URL: NSURL(string: urlString)!)
var response: NSURLResponse?
var error: NSErrorPointer = nil
var reqText = ["upc": "70411576937"]
var err: NSError?
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(reqText, options: nil, error: &err)
request.HTTPMethod = "GET"
request.addValue("MYAPIKEY", forHTTPHeaderField: "api_key")
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
var session = NSURLSession.sharedSession()
var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
var strData = NSString(data: data, encoding: NSUTF8StringEncoding)
if(err != nil) {
println(err!.localizedDescription)
}
else {
//this is where the error is printed
println(error)
var parseError : NSError?
// parse data
let unparsedArray: AnyObject? = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments, error: &parseError)
println(parseError)
if let resp = unparsedArray as? NSDictionary {
println(resp)
}
}
})
task.resume()

Answer 1

Body is not used in GET http methods. Use the following code to concat your params:
extension String {
/// Percent escape value to be added to a URL query value as specified in RFC 3986
///
/// This percent-escapes all characters besize the alphanumeric character set and "-", ".", "_", and "~".
///
/// http://www.ietf.org/rfc/rfc3986.txt
///
/// :returns: Return precent escaped string.
func stringByAddingPercentEncodingForURLQueryValue() -> String? {
let characterSet = NSMutableCharacterSet.alphanumericCharacterSet()
characterSet.addCharactersInString("-._~")
return self.stringByAddingPercentEncodingWithAllowedCharacters(characterSet)
}
}
extension Dictionary {
/// Build string representation of HTTP parameter dictionary of keys and objects
///
/// This percent escapes in compliance with RFC 3986
///
/// http://www.ietf.org/rfc/rfc3986.txt
///
/// :returns: String representation in the form of key1=value1&key2=value2 where the keys and values are percent escaped
func stringFromHttpParameters() -> String {
let parameterArray = map(self) { (key, value) -> String in
let percentEscapedKey = (key as! String).stringByAddingPercentEncodingForURLQueryValue()!
let percentEscapedValue = (value as! String).stringByAddingPercentEncodingForURLQueryValue()!
return "\(percentEscapedKey)=\(percentEscapedValue)"
}
return join("&", parameterArray)
}
}
var urlString = "https://api.semantics3.com/test/v1/products"
var reqText = ["upc": "70411576937"]
var err: NSError?
let parameterString = reqText.stringFromHttpParameters()
let requestURL = NSURL(string:"\(urlString)?\(parameterString)")!
var request = NSMutableURLRequest(URL: NSURL(string: urlString)!)
var response: NSURLResponse?
var error: NSError?
request.HTTPMethod = "GET"
request.addValue("MYAPIKEY", forHTTPHeaderField: "api_key")
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
var session = NSURLSession.sharedSession()
PARTIAL EDIT: SWIFT 2.1 (updated)
extension Dictionary {
func stringFromHttpParameters() -> String {
let parameterArray = self.map { (key, value) -> String in
let percentEscapedKey = (key as! String).stringByAddingPercentEncodingForURLQueryValue()!
let percentEscapedValue = (value as! String).stringByAddingPercentEncodingForURLQueryValue()!
return "\(percentEscapedKey)=\(percentEscapedValue)"
}
return parameterArray.joinWithSeparator("&")
}
}

Answer 2

Convert your JSON to a string, prepend the q= to this, then convert the resulting string to Data before assigning it to the request's HTTPBody.
Something like this perhaps:
let array = [ "one", "two" ]
let data = NSJSONSerialization.dataWithJSONObject(array, options: nil, error: nil)
let body= "q=" + NSString(data: data!, encoding: NSUTF8StringEncoding)
request.HTTPBody = body.dataUsingEncoding(NSUTF8StringEncoding)