IBM Swift Sandbox: Running NSURLSession: Error running code: unknown error code 132

Question

I am trying to execute the following script:

import Foundation

class TestURLSession{

var session: NSURLSession!

func run(){
    session = NSURLSession.sharedSession()

    let url = NSURL(string: "http://www.veenex.de/tmp/json")
    let request = NSMutableURLRequest(URL: url!)
    request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
    request.HTTPMethod = "GET"

    let getDataTask = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in

        // HTTP Response contains an error
        if let httpResponse = response as? NSHTTPURLResponse {
            if httpResponse.statusCode != 200 {
                print("response was not 200: \(response)")
                return
            }
        }

        // Error submitting Request
        if error != nil {
            print("error submitting request: \(error)")
            return
        }

        // print data
        if data != nil{

            do {
                let json = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers) as! NSArray

                for entry in json {
                    print(entry)
                }

            } catch {
                print("Error printing data")
            }

        }


    });

    getDataTask.resume()
}

}

let testURLSession = TestURLSession()
testURLSession.run()

But I receive the error message: "Error running code: unknown error code 132.". Executing the code in the Xcode Playground it works.

Answer 1

A pure Swift implementation of NSURLSession has not been written yet. Check out the NSURLSession.swift file on Apple's GitHub repo for Foundation.

Every method is NSUnimplemented(), which means, well, it hasn't been implemented yet. Until this class is finished, it will not be available for use on Linux and IBM's Swift Sandbox.

Answer 2

I dug into the error and this is the message that wasn't being sent for some reason:

fatal error: sharedSession() is not yet implemented: file Foundation/NSURLSession.swift, line 87
0  swift            0x0000000002f4abf8 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
1  swift            0x0000000002f493f6 llvm::sys::RunSignalHandlers() + 54
2  swift            0x0000000002f4b726
3  libpthread.so.0  0x00007fd9dae43d10
4  libswiftCore.so  0x00007fd9d0e5eac3 _TTSf4s_s_s_n___TFs16_assertionFailedFTVs12StaticStringSSS_Su_T_ + 147
5  libFoundation.so 0x00007fd9d3a5c21f
6  libFoundation.so 0x00007fd9d3b178de
7  libFoundation.so 0x00007fd9dbce10c7
8  libFoundation.so 0x00007fd9dbce1079
9  swift            0x0000000000d0da24 llvm::MCJIT::runFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) + 996
10 swift            0x0000000000d1102f llvm::ExecutionEngine::runFunctionAsMain(llvm::Function*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, char const* const*) + 1263
11 swift            0x0000000000bebdf8 swift::RunImmediately(swift::CompilerInstance&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, swift::IRGenOptions&, swift::SILOptions const&) + 2312
12 swift            0x000000000076656e
13 swift            0x0000000000761dfe frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 2590
14 swift            0x000000000075d513 main + 2835
15 libc.so.6        0x00007fd9da1e8a40 __libc_start_main + 240
16 swift            0x000000000075c8f9 _start + 41
Stack dump:
0.  Program arguments: /usr/bin/swift -frontend -interpret /swift-execution/code-tmp.swift -target x86_64-unknown-linux-gnu -disable-objc-interop -module-name main -lFoundation -lETSocket 
/usr/bin/doit.sh: line 19:    10 Illegal instruction     timeout 5 swift -lFoundation -lETSocket -v /swift-execution/$fileroot

So yea, we have something that's not yet implemented in Swift. I will improve the error messaging in our next patch to the Sandbox.