我正在尝试向以下 URL 发出请求
https://cactus.nci.nih.gov/chemical/structure/530-62-1/smiles
此请求应该只返回纯文本:
Clc1ccc(C=O)cc1
在 Playground 中使用这样的代码效果非常好:
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,如果我尝试在针对 macOS 10.13 的 macOS 项目(使用 Swift 4 和 Xcode 9)中使用代码,我会得到
URL for request is: 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() failed path:/var/run/mDNSResponder Socket:11 Err:-1 Errno:1 Operation not permitted 2017-10-10 17:23:08.476341+0100 AimieSmiles[18012:3495056] [] nw_resolver_create_dns_service_locked DNSServiceCreateDelegateConnection failed: ServiceNotRunning(-65563) 2017-10-10 17:23:08.476719+0100 AimieSmiles[18012:3495056] TIC TCP Conn Failed [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,使用这样的代码:
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:
Request: Optional(https://cactus.nci.nih.gov/chemical/structure/514-10-3/smiles) Response: nil Result: FAILURE Error: Optional(Error Domain=NSURLErrorDomain Code=-1003 "A server with the specified hostname could not be found." UserInfo={NSUnderlyingError=0x60c000450800 {Error Domain=kCFErrorDomainCFNetwork Code=-1003 "(null)" 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=A server with the specified hostname could not be found.})
从错误来看,该 URL 无效,或者无法被 macOS 应用程序识别?奇怪的是,它在 Playground 上运行良好......
我尝试在 plist 中启用应用程序传输安全设置 --> 允许任意加载 --> 是,但这没有什么区别。
最佳答案
问题其实很简单:我只需要启用应用程序沙箱并检查传入和传出的网络连接。
关于https - URLSession 或 Alamofire.Request 不适用于 URL 中的破折号?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46671635/