swift - 我想通过 Swift 实现 `curl --header $1`。(NSURLSession 的标题)

Question

我想将以下 curl 操作成 swift。我不知道如何在 Swift 中编写 NSURLSession 的 header 。

curl -X GET --header "X-Auth-Token: abcdef" https://devapi.thecurrencycloud.com/v2/rates/detailed?buy_currency=EUR&sell_currency=USD&fixed_side=buy&amount=1000

这是我的代码，但它在句子末尾返回了错误。你能告诉我问题是什么吗？

func exchangerate(){
    let token = "abcdef"
    let request = NSMutableURLRequest(URL: NSURL(string: "https://devapi.thecurrencycloud.com/v2/rates/detailed")!)
    var buyCurrency = "EUR"
    var sellCurrency = "USD"
    var fixSide = "buy"
    var amount = "1000"
    var postString:NSString = "buy_currency=\(buyCurrency)&sell_currency=\(sellCurrency)&fixed_side=\(fixSide)&amount=\(amount)"

    request.HTTPMethod = "GET"
    request.setValue(token, forHTTPHeaderField: "X-Auth-Token")
    request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)

    let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
        data, response, error in

        if error != nil {
            println("error=\(error)")
            return
        }

        println("response = \(response)")

        let responseStringExchangeRate = NSString(data: data, encoding: NSUTF8StringEncoding)
        println("responseStringExchangeRate = \(responseStringExchangeRate)")
    }
    task.resume()

}

error=Error Domain=NSURLErrorDomain Code=-1005 “操作无法完成。(NSURLErrorDomain 错误 -1005。)” UserInfo=0x7fea7b4d63f0 {NSErrorFailingURLStringKey= https://devapi.thecurrencycloud.com/v2/rates/detailed , NSErrorFailingURLKey= https://devapi.thecurrencycloud.com/v2/rates/detailed , _kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-4, NSUnderlyingError=0x7fea7d805ba0 “操作无法完成。(kCFErrorDomainCFNetwork 错误 -1005。)”

Answer 1

我已经解决了如下问题。感谢您的帮助。

func exchangerate(){
let token = "abcdef"
var buyCurrency = "EUR"
var sellCurrency = "USD"
var fixSide = "buy"
var amount = "1000"
// let request = NSMutableURLRequest(URL: NSURL(string: "https://devapi.thecurrencycloud.com/v2/rates/detailed")!)
var buyCurrency = "EUR"
//var postString:NSString = "buy_currency=\(buyCurrency)&sell_currency=\(sellCurrency)&fixed_side=\(fixSide)&amount=\(amount)"
let request = NSMutableURLRequest(URL: NSURL(string: "https://devapi.thecurrencycloud.com/v2/rates/detailed?buy_currency=\(buyCurrency)&sell_currency=\(sellCurrency)&fixed_side=\(fixSide)&amount=\(amount)")!)


request.HTTPMethod = "GET"

request.setValue(token, forHTTPHeaderField: "X-Auth-Token")
// request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)

let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
    data, response, error in

    if error != nil {
        println("error=\(error)")
        return
    }

    println("response = \(response)")

    let responseStringExchangeRate = NSString(data: data, encoding: NSUTF8StringEncoding)
    println("responseStringExchangeRate = \(responseStringExchangeRate)")
}
task.resume()