我正在尝试向以下网址发送请求
https://cactus.nci.nih.gov/chemical/structure/530-62-1/smiles
此请求应返回纯文本:
Clc1ccc(C=O)cc1
在像这样的游乐场中使用代码非常合适:
var cas = "530-62-1"
let url = URL(string: "https://cactus.nci.nih.gov/chemical/structure/\(cas)/smiles")
var result = ""
let task = URLSession.shared.dataTask(with: url!) {(data, response, error) in
//print(response!)
result = String(data: data!, encoding: String.Encoding(rawValue: String.Encoding.utf8.rawValue))!
print(result)
}
task.resume()
但是,如果我尝试使用我的macOS项目中的代码(使用Swift 4和Xcode 9)来定位macOS 10.13,我得到了
请求的网址是: https://cactus.nci.nih.gov/chemical/structure/104-88-1/smiles 2017-10-10 17:23:08.475739 + 0100 AimieSmiles [18012:3495056] dnssd_clientstub ConnectToServer:connect()失败 path:/ var / run / mDNSResponder Socket:11 Err:-1 Errno:1 操作不 允许 2017-10-10 17:23:08.476341 + 0100 AimieSmiles [18012:3495056] [] nw_resolver_create_dns_service_locked DNSServiceCreateDelegateConnection失败: ServiceNotRunning ( - 65563) 2017-10-10 17:23:08.476719 + 0100 AimieSmiles [18012:3495056] TIC TCP Conn失败[1:0x60c000162dc0]:10:-72000 Err(-65563)
如果我尝试使用Alamofire(我只是想检查一下这种可能性,请使用像这样的代码:
func alamoRequest(cas: String) -> String {
var smilesResult = ""
var stringURL = "https://cactus.nci.nih.gov/chemical/structure/\(cas)/smiles"
var url = URL(string: stringURL)!
Alamofire.request(url).responseString { response in
print("Request: \(String(describing: response.request))") // original url request
print("Response: \(String(describing: response.response))") // http url response
print("Result: \(response.result)") // response serialization result
print("Error: \(String(describing: response.error))")
if let result = response.result.value {
smilesResult = result
print("Result: \(result)") // serialized json response
} else if let data = response.data, let utf8Text = String(data: data, encoding: .utf8) {
smilesResult = utf8Text
print("Data: \(utf8Text)") // original server data as UTF8 string
}
}
return smilesResult
}
我收到以下错误:
请求: 可选(https://cactus.nci.nih.gov/chemical/structure/514-10-3/smiles) 响应:nil结果:FAILURE错误:可选(错误 Domain = NSURLErrorDomain Code = -1003“具有指定的服务器 无法找到主机名。“ UserInfo = {NSUnderlyingError = 0x60c000450800 {错误 Domain = kCFErrorDomainCFNetwork Code = -1003“(null)” 的UserInfo = {_ kCFStreamErrorCodeKey = -72000, _kCFStreamErrorDomainKey = 10}},NSErrorFailingURLStringKey = https://cactus.nci.nih.gov/chemical/structure/514-10-3/smiles, NSErrorFailingURLKey = https://cactus.nci.nih.gov/chemical/structure/514-10-3/smiles, _kCFStreamErrorDomainKey = 10,_kCFStreamErrorCodeKey = -72000,NSLocalizedDescription = 具有指定主机名的服务器无法 找到。})
从错误中查看URL无效或无法从macOS应用程序识别?奇怪的是,它在游乐场中工作得很好......
我尝试启用应用传输安全设置 - >允许任意负载 - >在plist中是,但这没有任何区别。
答案 0 :(得分:3)
问题变得微不足道:我只需要启用App Sandbox并检查传入和传出的网络连接。