以下卷曲作品
curl -G -H "api_key: MYAPIKEY" https://api.semantics3.com/test/v1/products -d 'q={"upc":"70411576937"}'
但是，尝试将其转换为iOS时，出现以下错误:
Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost." {NSErrorFailingURLStringKey=https://api.semantics3.com/test/v1/products,...}
我已经在下面附加了我的代码，但是我认为我的问题是正在提交到URL的json数据之前的“q =“。如果是这样，这叫什么？如何在json数据前加上“q =”？由于iOS为我们提供不相关的错误消息的坚定能力，我无法确切地说出。谢谢。
var urlString = "https://api.semantics3.com/test/v1/products"
var request = NSMutableURLRequest(URL: NSURL(string: urlString)!)
var response: NSURLResponse?
var error: NSErrorPointer = nil
var reqText = ["upc": "70411576937"]
var err: NSError?
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(reqText, options: nil, error: &err)
request.HTTPMethod = "GET"
request.addValue("MYAPIKEY", forHTTPHeaderField: "api_key")
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
var session = NSURLSession.sharedSession()
var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
var strData = NSString(data: data, encoding: NSUTF8StringEncoding)
if(err != nil) {
println(err!.localizedDescription)
}
else {
//this is where the error is printed
println(error)
var parseError : NSError?
// parse data
let unparsedArray: AnyObject? = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments, error: &parseError)
println(parseError)
if let resp = unparsedArray as? NSDictionary {
println(resp)
}
}
})
task.resume()
最佳答案
GET HTTP方法中未使用主体。使用以下代码来连接您的参数:
extension String {
/// Percent escape value to be added to a URL query value as specified in RFC 3986
///
/// This percent-escapes all characters besize the alphanumeric character set and "-", ".", "_", and "~".
///
/// http://www.ietf.org/rfc/rfc3986.txt
///
/// :returns: Return precent escaped string.
func stringByAddingPercentEncodingForURLQueryValue() -> String? {
let characterSet = NSMutableCharacterSet.alphanumericCharacterSet()
characterSet.addCharactersInString("-._~")
return self.stringByAddingPercentEncodingWithAllowedCharacters(characterSet)
}
}
extension Dictionary {
/// Build string representation of HTTP parameter dictionary of keys and objects
///
/// This percent escapes in compliance with RFC 3986
///
/// http://www.ietf.org/rfc/rfc3986.txt
///
/// :returns: String representation in the form of key1=value1&key2=value2 where the keys and values are percent escaped
func stringFromHttpParameters() -> String {
let parameterArray = map(self) { (key, value) -> String in
let percentEscapedKey = (key as! String).stringByAddingPercentEncodingForURLQueryValue()!
let percentEscapedValue = (value as! String).stringByAddingPercentEncodingForURLQueryValue()!
return "\(percentEscapedKey)=\(percentEscapedValue)"
}
return join("&", parameterArray)
}
}
var urlString = "https://api.semantics3.com/test/v1/products"
var reqText = ["upc": "70411576937"]
var err: NSError?
let parameterString = reqText.stringFromHttpParameters()
let requestURL = NSURL(string:"\(urlString)?\(parameterString)")!
var request = NSMutableURLRequest(URL: NSURL(string: urlString)!)
var response: NSURLResponse?
var error: NSError?
request.HTTPMethod = "GET"
request.addValue("MYAPIKEY", forHTTPHeaderField: "api_key")
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
var session = NSURLSession.sharedSession()
部分编辑:SWIFT 2.1(更新)
extension Dictionary {
func stringFromHttpParameters() -> String {
let parameterArray = self.map { (key, value) -> String in
let percentEscapedKey = (key as! String).stringByAddingPercentEncodingForURLQueryValue()!
let percentEscapedValue = (value as! String).stringByAddingPercentEncodingForURLQueryValue()!
return "\(percentEscapedKey)=\(percentEscapedValue)"
}
return parameterArray.joinWithSeparator("&")
}
}