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

Posted 2023-02-24

【中文标题】我想通过 Swift 实现 `curl --header $1`。（NSURLSession 的标头）

【英文标题】：I'd like to actualize `curl --header $1` by Swift.( Header of NSURLSession)

【发布时间】：2015-01-06 21:19:07

【问题描述】：

我想将以下 curl 操作为 swift。我不知道如何在 Swift 中编写 NSURLSession 的标头。

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，但它在句末返回错误。你能告诉我是什么问题吗？

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 error -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。)"

【参考方案1】：

我已经解决了以下问题。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()