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SwiftでHTTPリクエストする

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SwiftでシンプルにHTTP-GETするサンプルコードは多数見かけるが、HTTP-POSTする例を見かけないので、HTTP-GET、JSONデータをHTTP-POSTするコードをシンプルに書いてみた。

環境
- Xcode 6.1
- iOS 8.1

ViewController.swift
import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }


    // HTTP-GET
    @IBAction func getAsync(sender: AnyObject) {

        // create the url-request
        let urlString = "http://httpbin.org/get"
        var request = NSMutableURLRequest(URL: NSURL(string: urlString)!)

        // set the method(HTTP-GET)
        request.HTTPMethod = "GET"

        // use NSURLSessionDataTask
        var task = NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: { data, response, error in
            if (error == nil) {
                var result = NSString(data: data, encoding: NSUTF8StringEncoding)!
                println(result)
            } else {
                println(error)
            }
        })
        task.resume()

    }


    // HTTP-POST
    @IBAction func postAsync(sender: AnyObject) {

        // create the url-request
        let urlString = "http://httpbin.org/post"
        var request = NSMutableURLRequest(URL: NSURL(string: urlString)!)

        // set the method(HTTP-POST)
        request.HTTPMethod = "POST"
        // set the header(s)
        request.addValue("application/json", forHTTPHeaderField: "Content-Type")

        // set the request-body(JSON)
        var params: [String: AnyObject] = [
            "foo": "bar",
            "baz": [
                "a": 1,
                "b": 20,
                "c": 300
            ]
        ]
        request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: nil)

        // use NSURLSessionDataTask
        var task = NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: {data, response, error in
            if (error == nil) {
                var result = NSString(data: data, encoding: NSUTF8StringEncoding)!
                println(result)
            } else {
                println(error)
            }
        })
        task.resume()

    }

}
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