URL query 파싱 및 json string 변환

// 사용 방법
let url = URL(string:"https://www.test.com/myconmand?param1=ASDF&param2=1234")!
let qParams = url.queryParams().toJsonString()
let param2 = url.valueOf("param2")

print(
    """
    scheme      = \(url.scheme ?? "")
    host        = \(url.host ?? "")
    path        = \(url.path)
    query       = \(url.query ?? "")
    qParams     = \(qParams)
    param2      = \(param2 ?? "")
    """
)

// 결과 
scheme      = https
host        = www.test.com
path        = /myconmand
query       = param1=ASDF&param2=1234
qParams     = {"param1":"ASDF","param2":"1234"}
param2      = 1234

extension URL {
    
    func queryParams() -> [String:Any] {
        let queryItems = URLComponents(url: self, resolvingAgainstBaseURL: false)?.queryItems
        let queryTuples: [(String, Any)] = queryItems?.compactMap{
            guard let value = $0.value else { return nil }
            return ($0.name, value)
        } ?? []
        return Dictionary(uniqueKeysWithValues: queryTuples)
    }
    
    func valueOf(_ queryParamaterName: String) -> String? {
        guard let url = URLComponents(string: self.absoluteString) else { return nil }
        return url.queryItems?.first(where: { $0.name == queryParamaterName })?.value
    }
    
}

extension Dictionary {

    func toJsonData() -> Data {
        var jsonData: Data?
        do {
            jsonData = try JSONSerialization.data(withJSONObject: self, options: .init(rawValue: 0))
        } catch {
            print(error)
        }
        return jsonData!
    }

    func toJsonDataPrettyPrinted() -> Data {
        var jsonData: Data?
        do {
            jsonData = try JSONSerialization.data(withJSONObject: self, options: JSONSerialization.WritingOptions.prettyPrinted)
        } catch {
            print(error)
        }
        return jsonData!
    }
    
    func toJsonString() -> String {
        return toJsonData().toString()
    }
    
    func toPrettyPrintedJsonString() -> String {
        return toJsonDataPrettyPrinted().toString()
    }
    
}

extension Data {
    func hexString() -> String {
        return map { String(format: "%02hhx", $0) }.joined()
    }
    
    func toString() -> String {
        return String(data: self, encoding: String.Encoding.utf8)!
    }
}

 

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