GET url connection with Json ios - swift

Question

I'm learning swift and I need to make a GET request, so this is my code:

    var j = ["user": "[email protected]"]
    var e: NSError?
    let jsonData = NSJSONSerialization.dataWithJSONObject(j,options: NSJSONWritingOptions(0),error: &e) 
    var jsonString = NSString(data: jsonData!, encoding: NSUTF8StringEncoding)

    var urlPath = "http://test.example.io/materials?query=\(jsonString)";
    println(urlPath)

    var url: NSURL = NSURL(string: urlPath)
    var request: NSMutableURLRequest =  NSMutableURLRequest(URL: url)
    request.addValue("xxxxxxxxxxxxxxxxxxxx" , forHTTPHeaderField: "Teech-Application-Id")
    request.addValue("xxxxxxxxxxxxxxxxxxxx" , forHTTPHeaderField: "Teech-REST-API-Key")
    request.addValue("application/json" , forHTTPHeaderField: "Content-Type")
    request.HTTPMethod = "GET"

    println(request)

And this is my output debug

http://test.example.io/materials?query={"user":"[email protected]"}

<NSMutableURLRequest: 0x7f8ee3480320> { URL: (null), headers: {
"Content-Type" = "application/json";
"Teech-Application-Id" = xxxxxxxxxxxxxxxxxxxxxxxx;
"Teech-REST-API-Key" = xxxxxxxxxxxxxxxxxxxxxxxxx;
} }

Why the first print function return the correct url and inside the print request there is a null url, where is my mistake ? I've tried with a url without a json and it runs.

Answer 1

I done it, the solution is escaping the string.

var escapedSearchTerm = urlPath.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)
var url: NSURL = NSURL(string: escapedSearchTerm!)