Question

我正在尝试使用网络服务将阿拉伯语翻译成英语。构造URL时出错。我已经定义了这些案例：

enum MyErrors: Error {
    case urlParsingError(String)
    case nonDictonaryObjectReturned(Any)
}

我的代码是：

func translateWord (text: String, ToLan:String) {

   // the text is "مرحبا" and ToLan is "en"

    do {
        let jsonString = "https://translate.yandex.net/api/v1.5/tr.json/translate?key=apikey&text=\(text)&lang=\(ToLan)"

        guard let url = URL(string: jsonString) else {
            throw MyErrors.urlParsingError(jsonString)
        }

        let data = try Data(contentsOf: url, options: Data.ReadingOptions())

        let jsonObject = try JSONSerialization.jsonObject(with: data,options: .allowFragments)
        guard let dictionary = jsonObject as? [AnyHashable: Any] else {
            throw MyErrors.nonDictonaryObjectReturned(jsonObject)
        }
        let result = dictionary["text"] as? [Any]
        let translattedSTR = result?.first as? String
        let encodedData = translattedSTR?.data(using: String.Encoding.utf8)!
        print(encodedData!)
        self.textresult.text = translattedSTR


    } catch {
        print("caught error \(error)")
    }

但不幸的是，它打印

捕获错误urlParsingError（输出网址）

另外，我的结构看起来像[this]（https://translate.yandex.net/api/v1.5/tr.json/translate?key= apikey＆amp; text =مرحبا＆amp; lang = en）

Answer 1

您需要正确编码查询参数的值。一个好的解决方案是使用URLComponents来构建您的查询。

然后这些行：

let jsonString = "https://translate.yandex.net/api/v1.5/tr.json/translate?key=myAPIkey&text=\(text)&lang=\(ToLan)"

guard let url = URL(string: jsonString) else {
    throw MyErrors.urlParsingError(jsonString)
}

需要替换为：

let baseString = "https://translate.yandex.net/api/v1.5/tr.json/translate"
var comps = URLComponents(string: baseString)!
let keyQuery = URLQueryItem(name: "key", value: "myAPIKey")
let textQuery = URLQueryItem(name: "text", value: text)
let langQuery = URLQueryItem(name: "lang", value: ToLan)
comps.queryItems = [ keyQuery, textQuery, langQuery ]
guard let url = comps.url else {
    throw MyErrors.urlParsingError("\(comps)")
}

结果网址现在是：

https://translate.yandex.net/api/v1.5/tr.json/translate?key=myAPIkey&text=%D9%85%D8%B1%D8%AD%D8%A8%D8%A7&lang=en

Answer 2

您必须对String进行编码才能获得有效的URL。您可以使用String.addingPercentEncoding(withAllowedCharacters: )。

执行此操作

let jsonString = "https://translate.yandex.net/api/v1.5/tr.json/translate?key=trnsl.1.1.20170517T154730Z.927d87b76de60242.7a92e4612778a4838d40ab192df5297d2a1af4ed&text=\(text)&lang=\(ToLan)"

guard let encodedJsonString = jsonString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed), let url = URL(string: encodedJsonString) else {
    throw MyErrors.urlParsingError(jsonString)
}

编码的网址变为：

https://translate.yandex.net/api/v1.5/tr.json/translate?key=trnsl.1.1.20170517T154730Z.927d87b76de60242.7a92e4612778a4838d40ab192df5297d2a1af4ed&text=%D9%85%D8%B1%D8%AD%D8%A8%D8%A7&lang=en

使用阿拉伯文本进行URL解析错误

2 个答案: