NSURLSession経由でHTTP requestを投げるサンプルコード Swift版

GET HTTP Request (非同期)

import UIKit

//playgroundで実行する際に必要なだけ
import XCPlayground

//Construct url object via string
var url = NSURL(string: "http://www.example.com/")
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config)
var req = NSURLRequest(URL: url!)

//NSURLSessionDownloadTask is retured from session.dataTaskWithRequest
var task = session.dataTaskWithRequest(req, completionHandler: {
    (data, resp, err) in
        println(resp.URL!)
        println(NSString(data: data, encoding: NSUTF8StringEncoding))
    })
task.resume()

//playgroundで実行する際に必要なだけ
XCPSetExecutionShouldContinueIndefinitely()

URL Loading System Programming Guide
NSURLSession のまとめ

POST HTTP Request

下記のようにncコマンドでlistenしておくと、postされるリクエストをターミナルで見る事ができるので、オススメ。

$nc -l 1234

• Getのコードとの差はHTTPMethodとHTTPBodyのプロパティの値だけ

import UIKit

//playgroundで実行する際に必要なだけ
import XCPlayground

//Construct url object via string
var url = NSURL(string: "http://localhost:1234/")
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config)
var req = NSMutableURLRequest(URL: url!)
req.HTTPMethod = "POST"
req.HTTPBody = "id=13&name=Jack".dataUsingEncoding(NSUTF8StringEncoding)
var task = session.dataTaskWithRequest(req, completionHandler: {
    (data, resp, err) in
        println(resp.URL!)
        println(NSString(data: data, encoding: NSUTF8StringEncoding))
    })
task.resume()

//playgroundで実行する際に必要なだけ
XCPSetExecutionShouldContinueIndefinitely()

JSON POST HTTP Request

• 通常のPOSTとの差はContentTypeの指定とBody部分のデータをNSJSONSerialization経由でJSON化する部分くらい

import UIKit

//playgroundで実行する際に必要なだけ
import XCPlayground

let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config)

//Construct url object via string
var url = NSURL(string: "http://localhost:1234/")
//Construct object to be converted to json
let params:[String: AnyObject] = [
    "email" : "aaaa",
    "userPwd" : "bbbb" ]
var req = NSMutableURLRequest(URL: url!)
req.HTTPMethod = "POST"
req.setValue("application/json; charaset=utf-8", forHTTPHeaderField: "Content-Type")

//Convert founcation object to json and set to HTTP body
var err: NSError?
req.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: NSJSONWritingOptions.allZeros, error: &err)

var task = session.dataTaskWithRequest(req, completionHandler: {
    (data, resp, err) in
        println(resp.URL!)
        println(NSString(data: data, encoding: NSUTF8StringEncoding))
    })
task.resume()

//playgroundで実行する際に必要なだけ
XCPSetExecutionShouldContinueIndefinitely()

###NSJSONSerialization

• JSONとFoundationオブジェクトの変換を行うクラス

NSJSONSerialization Class Reference

How to POST JSON data using NSURLSession in swift